Sewage pump is a non-clogging pump, and other pumps, impeller, pressure water chamber, sewage pump is the two core components. The performance of the merits, also on behalf of the merits of pump performance, anti-clogging performance of sewage pumps, the level of efficiency, as well as cavitation performance, anti-wear performance is mainly by the leaf pump and pressure chamber two parts to ensure. It is mainly used for conveying liquid containing suspended solids such as fiber, paper dust, particles, etc. It is widely used in environmental protection, municipal, water conservancy, sewage treatment, etc. The impeller is the key to the non-clogging performance. Structure is divided into four categories: blade (open, closed), swirl, flow channel, (including single-channel and dual flow) spiral centrifugal four.
Open impeller is easy to manufacture and can be easily cleaned and repaired when the impeller is clogged. However, in the long run, the clearance between the blade and the side wall of the pressurized water chamber will increase under the abrasion of particles. So that efficiency is reduced. And the increase in the gap will destroy the pressure distribution on the blade. Not only produce a lot of vortex loss, but also increase the axial force of the pump, at the same time, due to increased clearance, the flow of liquid flow stability is damaged, the pump vibration, the type impeller is not easy to transport Large particles and long fiber medium, from the performance point of view, the type of impeller efficiency is low, the maximum efficiency is about equivalent to about 92% of ordinary closed impeller, lift curve is relatively flat.
2, swirling impeller:
The use of this type of impeller pump, impeller part or all of the compression chamber flow path. So no clogging performance, particle capacity and long fiber through the ability of strong. Particle flow in the pressurized water chamber by the impeller rotation generated by the eddy current driven by the movement of suspended particles itself does not produce energy, but in the liquid and the exchange of energy within the channel. In the course of the flow, suspended particles or long fibers do not contact with the leaves, leaves more wear and less light, there is no gap due to increased wear and tear in the long run will not cause serious decline in efficiency, the use of the Type impeller pump suitable for pumping large particles and long fibers containing medium.
From the performance point of view, the efficiency of the impeller is low, only about 70% of the ordinary closed impeller, lift curve is relatively flat.
3, the closed impeller:
This type of impeller normal efficiency is higher. And in the long-term operation of the situation is relatively stable, the use of this type of impeller pump axial force is small, and can be set on the front and rear cover vane. The vane on the front cover can reduce the vortex loss of the impeller inlet and the wear of the seal ring. The secondary vane on the rear cover not only acts to balance the axial force, but also prevents the suspension particles from entering the mechanical seal chamber to protect the mechanical seal. However, the type of impeller without blocking the poor, easy to winding, not suitable for pumping with large particles (long fibers) and other untreated sewage media.
4, flow-channel impeller:
The impeller is a non-blade impeller, the impeller is a flow from the inlet to the outlet of a curved flow channel. So it is suitable for pumping medium containing large particles and long fibers. Anti-blocking good.
From the performance point of view, the type of impeller efficiency and general closed impeller little difference, but with the type of impeller pump head curve is steep drop. Power curve is relatively stable, not easy to produce super-power problem, but the type of impeller cavitation performance is not as good as ordinary closed impeller, especially suitable for use in the import of pressure pump.
5, spiral centrifugal impeller:
The blades of the impeller are twisted helical blades extending axially from the suction port on the conical hub body. The impeller pump and the capacity of the pump and the role of centrifugal pump, suspended particles in the leaves flow through, do not impact any part of the pump, so the non-destructive good. And the destructiveness of the conveyed material is small. Due to the propulsive effect of the spiral, the suspended particles through the strong, so the pump impeller with the type suitable for pumping large particles and long fibers containing medium, and high concentrations of media. The destruction of the transmission medium has strict requirements of the occasion has obvious characteristics.
Sewage pump model:
LW; WL vertical sewage pump: WL, LW vertical non-clogging sewage pump can be mobile, can also be fixed for the construction, farmland irrigation and drainage, enterprises and institutions in the process of sewage, pumping and transportation, Transportation of sewage, but also for the hydrophobic pump, pulp pumps, irrigation and so on.
PW; PWL centrifugal sewage pump: PW series sewage pump is suitable for pumping liquids below 80 ℃ with fiber or other suspended matter for urban industrial and mining enterprises to use sewage water stool.
XWJ-type energy-saving non-clogging pulp pump: XWJ-type pulp pump can be widely used in light industry, paper industry temperature is below 110 ℃, the concentration of less than 6% slurry transport, but also for industrial and urban water supply, drainage and other occasions .
WQ; QW submersible sewage pump: WQ; QW submersible sewage pump uses a unique structure and a new mechanical seal, can effectively transport containing solid and long fibers.
GW-type sewage pump: GW pipeline sewage pump is the use of advanced technology at home and abroad to develop a successful energy-efficient sewage pump, widely used in high-rise buildings, long-distance pipeline pressurized water or other media purposes.
ZJWQK automatic mixing with cutting sewage pump: automatic mixing sewage pump, with cutting sewage pump, automatic mixing with a cutting pump with large flow channel anti-blocking hydraulic components designed single-channel half-open impeller structure, sewage capacity, Blocking, can effectively through the pump diameter of 5 times the diameter of fiber material and pump diameter of about 30% to 80% of the solid particles. Its unique tearing mechanism can tear fiber material, cut off, and then smooth discharge without adding a filter on the pump.
The so-called rational election pump, is to consider the pump unit and pump station investment and operating costs and other comprehensive technical and economic indicators, so that in line with economic, security, the principle of application. Specifically, the following aspects:
Must meet the requirements of the use of flow and head, which requires the pump operating point (the device characteristic curve and pump performance curve intersection) often remain in the high-performance range of operation, so not only save power and damage to parts.
1. The selected water pump should be small, light weight, low cost, but also has good characteristics and high efficiency.
2. Has a good anti-cavitation performance, so that both reduce the excavation depth of the pump house, not to pump cavitation, smooth operation, long life.
3. According to the selected pump construction pump station, less investment, low operating costs.
Pump selection steps
First, the list of basic data:
1, the media properties: media name, specific gravity, viscosity, corrosion, toxicity and so on.
2, the medium contained in the particle diameter, content.
3, the medium temperature: (℃)
4, the required flow
General industrial pumps in the process can ignore the leakage in the pipeline system, but must take into account the process of change in the flow of the impact. Agricultural pumps If the use of open channel water, but also must consider the leakage and evaporation.
5, the pressure: suction tank pressure, drainage tank pressure, pipeline system pressure drop (head loss).
6, pipe system data (diameter, length, pipe attachment type and number of suction pool to the pressure tank geometric elevation, etc.).
The device characteristic curve should also be made if required.
In the design layout pipeline, should note the following:
A, reasonable choice of pipe diameter, pipe diameter, at the same flow rate, the flow velocity is small, the resistance loss is small, but the price is high, the pipe diameter is small, will lead to a sharp increase in resistance loss, the selected pump head increase, With the increase in power, costs and operating costs have increased. So should be considered from the technical and economic point of view.
B, the exhaust pipe and its joints should consider the maximum pressure can withstand.
C, pipe layout should be arranged as straight as possible to minimize the pipe fittings and to minimize the length of the pipe must be turned when the bending radius of the elbow pipe diameter should be 3 to 5 times the angle as much as 90 Lt; 0 & gt; C.
D, the pump must be installed on the discharge side of the valve (ball valve or globe valve, etc.) and check valve. The valve is used to adjust the operating point of the pump. The check valve prevents the pump from reversing when the liquid is backflow and prevents the pump from hitting the water hammer. (When the liquid backflow, it will have a huge reverse pressure, damage to the pump)
Second, determine the flow head
Determination of flow
A, if the production process has been given the minimum, normal, maximum flow, the maximum flow should be considered.
B, if the production process only gives the normal flow, should consider leaving a certain margin.
For ns> 100 high flow low unexpected pump, the flow margin to take 5%, on ns <50 low-flow high-lift pump, the flow margin to take 10%, 50 ≤ ns ≤ 100 pump, the flow margin Take 5%, poor quality and poor operating conditions of the pump, the flow margin should be taken 10%.
C, if the basic data only to the weight flow, should be converted into volume flow.
Open impeller is easy to manufacture and can be easily cleaned and repaired when the impeller is clogged. However, in the long run, the clearance between the blade and the side wall of the pressurized water chamber will increase under the abrasion of particles. So that efficiency is reduced. And the increase in the gap will destroy the pressure distribution on the blade. Not only produce a lot of vortex loss, but also increase the axial force of the pump, at the same time, due to increased clearance, the flow of liquid flow stability is damaged, the pump vibration, the type impeller is not easy to transport Large particles and long fiber medium, from the performance point of view, the type of impeller efficiency is low, the maximum efficiency is about equivalent to about 92% of ordinary closed impeller, lift curve is relatively flat.
2, swirling impeller:
The use of this type of impeller pump, impeller part or all of the compression chamber flow path. So no clogging performance, particle capacity and long fiber through the ability of strong. Particle flow in the pressurized water chamber by the impeller rotation generated by the eddy current driven by the movement of suspended particles itself does not produce energy, but in the liquid and the exchange of energy within the channel. In the course of the flow, suspended particles or long fibers do not contact with the leaves, leaves more wear and less light, there is no gap due to increased wear and tear in the long run will not cause serious decline in efficiency, the use of the Type impeller pump suitable for pumping large particles and long fibers containing medium.
From the performance point of view, the efficiency of the impeller is low, only about 70% of the ordinary closed impeller, lift curve is relatively flat.
3, the closed impeller:
This type of impeller normal efficiency is higher. And in the long-term operation of the situation is relatively stable, the use of this type of impeller pump axial force is small, and can be set on the front and rear cover vane. The vane on the front cover can reduce the vortex loss of the impeller inlet and the wear of the seal ring. The secondary vane on the rear cover not only acts to balance the axial force, but also prevents the suspension particles from entering the mechanical seal chamber to protect the mechanical seal. However, the type of impeller without blocking the poor, easy to winding, not suitable for pumping with large particles (long fibers) and other untreated sewage media.
4, flow-channel impeller:
The impeller is a non-blade impeller, the impeller is a flow from the inlet to the outlet of a curved flow channel. So it is suitable for pumping medium containing large particles and long fibers. Anti-blocking good.
From the performance point of view, the type of impeller efficiency and general closed impeller little difference, but with the type of impeller pump head curve is steep drop. Power curve is relatively stable, not easy to produce super-power problem, but the type of impeller cavitation performance is not as good as ordinary closed impeller, especially suitable for use in the import of pressure pump.
5, spiral centrifugal impeller:
The blades of the impeller are twisted helical blades extending axially from the suction port on the conical hub body. The impeller pump and the capacity of the pump and the role of centrifugal pump, suspended particles in the leaves flow through, do not impact any part of the pump, so the non-destructive good. And the destructiveness of the conveyed material is small. Due to the propulsive effect of the spiral, the suspended particles through the strong, so the pump impeller with the type suitable for pumping large particles and long fibers containing medium, and high concentrations of media. The destruction of the transmission medium has strict requirements of the occasion has obvious characteristics.
Sewage pump model:
LW; WL vertical sewage pump: WL, LW vertical non-clogging sewage pump can be mobile, can also be fixed for the construction, farmland irrigation and drainage, enterprises and institutions in the process of sewage, pumping and transportation, Transportation of sewage, but also for the hydrophobic pump, pulp pumps, irrigation and so on.
PW; PWL centrifugal sewage pump: PW series sewage pump is suitable for pumping liquids below 80 ℃ with fiber or other suspended matter for urban industrial and mining enterprises to use sewage water stool.
XWJ-type energy-saving non-clogging pulp pump: XWJ-type pulp pump can be widely used in light industry, paper industry temperature is below 110 ℃, the concentration of less than 6% slurry transport, but also for industrial and urban water supply, drainage and other occasions .
WQ; QW submersible sewage pump: WQ; QW submersible sewage pump uses a unique structure and a new mechanical seal, can effectively transport containing solid and long fibers.
GW-type sewage pump: GW pipeline sewage pump is the use of advanced technology at home and abroad to develop a successful energy-efficient sewage pump, widely used in high-rise buildings, long-distance pipeline pressurized water or other media purposes.
ZJWQK automatic mixing with cutting sewage pump: automatic mixing sewage pump, with cutting sewage pump, automatic mixing with a cutting pump with large flow channel anti-blocking hydraulic components designed single-channel half-open impeller structure, sewage capacity, Blocking, can effectively through the pump diameter of 5 times the diameter of fiber material and pump diameter of about 30% to 80% of the solid particles. Its unique tearing mechanism can tear fiber material, cut off, and then smooth discharge without adding a filter on the pump.
The so-called rational election pump, is to consider the pump unit and pump station investment and operating costs and other comprehensive technical and economic indicators, so that in line with economic, security, the principle of application. Specifically, the following aspects:
Must meet the requirements of the use of flow and head, which requires the pump operating point (the device characteristic curve and pump performance curve intersection) often remain in the high-performance range of operation, so not only save power and damage to parts.
1. The selected water pump should be small, light weight, low cost, but also has good characteristics and high efficiency.
2. Has a good anti-cavitation performance, so that both reduce the excavation depth of the pump house, not to pump cavitation, smooth operation, long life.
3. According to the selected pump construction pump station, less investment, low operating costs.
Pump selection steps
First, the list of basic data:
1, the media properties: media name, specific gravity, viscosity, corrosion, toxicity and so on.
2, the medium contained in the particle diameter, content.
3, the medium temperature: (℃)
4, the required flow
General industrial pumps in the process can ignore the leakage in the pipeline system, but must take into account the process of change in the flow of the impact. Agricultural pumps If the use of open channel water, but also must consider the leakage and evaporation.
5, the pressure: suction tank pressure, drainage tank pressure, pipeline system pressure drop (head loss).
6, pipe system data (diameter, length, pipe attachment type and number of suction pool to the pressure tank geometric elevation, etc.).
The device characteristic curve should also be made if required.
In the design layout pipeline, should note the following:
A, reasonable choice of pipe diameter, pipe diameter, at the same flow rate, the flow velocity is small, the resistance loss is small, but the price is high, the pipe diameter is small, will lead to a sharp increase in resistance loss, the selected pump head increase, With the increase in power, costs and operating costs have increased. So should be considered from the technical and economic point of view.
B, the exhaust pipe and its joints should consider the maximum pressure can withstand.
C, pipe layout should be arranged as straight as possible to minimize the pipe fittings and to minimize the length of the pipe must be turned when the bending radius of the elbow pipe diameter should be 3 to 5 times the angle as much as 90 Lt; 0 & gt; C.
D, the pump must be installed on the discharge side of the valve (ball valve or globe valve, etc.) and check valve. The valve is used to adjust the operating point of the pump. The check valve prevents the pump from reversing when the liquid is backflow and prevents the pump from hitting the water hammer. (When the liquid backflow, it will have a huge reverse pressure, damage to the pump)
Second, determine the flow head
Determination of flow
A, if the production process has been given the minimum, normal, maximum flow, the maximum flow should be considered.
B, if the production process only gives the normal flow, should consider leaving a certain margin.
For ns> 100 high flow low unexpected pump, the flow margin to take 5%, on ns <50 low-flow high-lift pump, the flow margin to take 10%, 50 ≤ ns ≤ 100 pump, the flow margin Take 5%, poor quality and poor operating conditions of the pump, the flow margin should be taken 10%.
C, if the basic data only to the weight flow, should be converted into volume flow.
Manufacturers recommend: Shenlong stainless steel sewage pump
Keywords:Sewage pump, sewage pump works, sewage pump selection
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