CN112648191B - Medium consistency stock pump and conveying system thereof - Google Patents
Medium consistency stock pump and conveying system thereof Download PDFInfo
- Publication number
- CN112648191B CN112648191B CN202011527387.8A CN202011527387A CN112648191B CN 112648191 B CN112648191 B CN 112648191B CN 202011527387 A CN202011527387 A CN 202011527387A CN 112648191 B CN112648191 B CN 112648191B
- Authority
- CN
- China
- Prior art keywords
- pump
- pipe
- medium
- consistency
- water
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D7/00—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts
- F04D7/02—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type
- F04D7/04—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type the fluids being viscous or non-homogenous
- F04D7/045—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type the fluids being viscous or non-homogenous with means for comminuting, mixing stirring or otherwise treating
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
- F04D15/02—Stopping of pumps, or operating valves, on occurrence of unwanted conditions
- F04D15/0209—Stopping of pumps, or operating valves, on occurrence of unwanted conditions responsive to a condition of the working fluid
- F04D15/0218—Stopping of pumps, or operating valves, on occurrence of unwanted conditions responsive to a condition of the working fluid the condition being a liquid level or a lack of liquid supply
- F04D15/0227—Lack of liquid level being detected using a flow transducer
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/007—Details, component parts, or accessories especially adapted for liquid pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/58—Cooling; Heating; Diminishing heat transfer
- F04D29/586—Cooling; Heating; Diminishing heat transfer specially adapted for liquid pumps
Abstract
The invention discloses a medium consistency pump and a conveying system thereof, and the medium consistency pump comprises a pump body, wherein a turbulence generator is arranged at the front end of a conveying impeller, a fluidization area is formed at the front end of the turbulence generator, a gaseous separation area is formed at the top end of the turbulence generator, a pumping area is formed between an impeller of the conveying impeller and a chamber of the pump body, the conveying impeller generates centrifugal force in the rotating process so that a degassing area is formed between the back side of the conveying impeller and the side wall of the chamber of the pump body, and a fiber recovery area is formed at the center of the back side of the conveying impeller; the system also comprises a conveying system, wherein the conveying system consists of a medium-consistency vertical pipe, a medium-consistency slurry pump, a vacuum pump vapor-liquid separator, an electric controller and a sealing cooling water inlet pipe. The invention can fluidize and degas the medium-consistency slurry by arranging the specific medium-consistency slurry pump, thereby improving the conveying capacity of the medium-consistency slurry, and can automatically regulate and dilute the liquid level in the medium-consistency vertical pipe by matching with a specific conveying system.
Description
Technical Field
The invention relates to the technical field of slurry conveying, in particular to a medium consistency pump and a conveying system thereof.
Background
In the medium-concentration bleaching production process, because the flow of the slurry is unstable or the concentration is unstable, the liquid level of the medium-concentration vertical pipe is often fluctuated, which is unfavorable for the subsequent production process. The frequency of a motor is adjusted according to the change of the liquid level so as to change the rotating speed of a medium consistency pump, so that the aim of adjusting the flow and stabilizing the liquid level of a vertical pipe is fulfilled. However, when the rotation speed is reduced to a certain value, the situation that pumping cannot be performed easily occurs due to the characteristics of high air content, high viscosity, high conveying resistance and the like of the medium-concentration slurry.
Disclosure of Invention
The invention aims to provide a medium consistency pump and a conveying system thereof. According to the invention, the specific medium-consistency slurry pump is arranged to fluidize and degas medium-consistency slurry, so that the conveying capacity of the medium-consistency slurry is improved, and the medium-consistency slurry pump is matched with a specific conveying system for use, so that the liquid level in the medium-consistency vertical pipe can be automatically adjusted and diluted, and the inconvenience in conveying due to high viscosity of the slurry in the medium-consistency vertical pipe is avoided.
The technical scheme of the invention is as follows: the medium consistency pump and the conveying system thereof comprise a medium consistency pump, wherein the medium consistency pump comprises a pump body, a slurry inlet pipe and a slurry outlet pipe are arranged on the pump body, a rotating shaft is arranged in the pump body, a conveying impeller is arranged on the rotating shaft, a turbulence generator is arranged at the front end of the conveying impeller, the turbulence generator and the conveying impeller are coaxially arranged, a fluidization region is formed at the front end of the turbulence generator, a gas separation region is formed at the top end of the turbulence generator, a pumping region is formed between the impeller of the conveying impeller and a chamber of the pump body, a gas removal region is formed between the back side of the conveying impeller and the side wall of the chamber of the pump body by the centrifugal force generated by the conveying impeller in the rotating process, a fiber recovery region is formed at the center of the back side of the conveying impeller, the rotating shaft is sealed with the pump body through a mechanical sealing element, and a cooling water pipe is arranged in the mechanical sealing element; the pump body is provided with a discharge pipe connected with the fiber recovery area; a degassing conduit element connected with a degassing region is arranged on the pump body;
the device is characterized by also comprising a conveying system, wherein the conveying system consists of a medium-consistency vertical pipe, a medium-consistency slurry pump, a vacuum pump vapor-liquid separator, an electric controller and a sealing cooling water inlet pipe, the medium-consistency vertical pipe is connected with a dilution water inlet pipe group, the bottom of the medium-consistency vertical pipe is provided with a liquid outlet pipe, the liquid outlet pipe is connected with a slurry inlet pipe of the medium-consistency slurry pump through a first conveying pipe, and a degassing conduit element on the medium-consistency slurry pump is connected with an air inlet pipe of the vacuum pump vapor-liquid separator through a first connecting pipe; be connected with the second conveyer pipe on the play thick liquid pipe on the medium consistency pump, the tip of second conveyer pipe is equipped with out thick liquid aperture governing valve F3, the mechanical seal inlet tube on the vacuum pump vapour and liquid separator is gone into the union coupling through first branch pipe and sealed cooling water, condenser tube on the medium consistency pump goes into the union coupling through second branch pipe and sealed cooling water, be equipped with liquid level detection unit YC in the medium consistency riser, liquid level detection unit YC, medium consistency pump, vacuum pump vapour and liquid separator all are connected with the electropneumatic controller electricity.
In the medium consistency slurry pump and the conveying system thereof, the dilution water inlet pipe group comprises a water inlet main pipe, the water inlet main pipe is provided with a dilution water stop valve F0 and a dilution water pressure gauge P1, the lower end of the medium consistency vertical pipe is provided with a dilution water pipe, the top end of the medium consistency vertical pipe is provided with a dilution water nozzle, the water inlet main pipe is connected with the dilution water pipe through a first water inlet branch pipe, the water inlet main pipe is connected with the dilution water nozzle through a second water inlet branch pipe, and the first water inlet branch pipe is provided with a lower dilution opening degree regulating valve F2; and an upper dilution opening regulating valve F1 is arranged on the second water inlet branch pipe.
In the medium consistency pump and the conveying system thereof, the first branch pipe is provided with the first sealing water flow detector VS, and the second branch pipe is provided with the second sealing water flow detector MS.
In the medium consistency pump and the conveying system thereof, the sealing cooling water inlet pipe is provided with a sealing water stop valve F5.
In the medium consistency pump and the conveying system thereof, the first connecting pipe is provided with a medium consistency pump air release valve F4, a vacuum air release pipe and a vacuum degree detection pressure gauge P2; the vacuum air release pipe is provided with a vacuum air release valve F7, the first connecting pipe is connected with washing water inlet pipe, and the washing water inlet pipe is provided with a washing water valve F6.
In the above-mentioned medium consistency pump and its conveying system, the dilution water stop valve F0, the upper dilution opening regulating valve F1, the lower dilution opening regulating valve F2, the slurry outlet opening regulating valve F3, the medium consistency pump air release valve F4, the sealing water stop valve F5, the flushing water valve F6, the vacuum air release valve F7, the first sealing water flow detector VS, and the second sealing water flow detector MS are respectively electrically connected to the electric controller.
In the medium consistency slurry pump and the conveying system thereof, the control method of the conveying system is to detect the slurry liquid level height in the medium consistency vertical pipe through the liquid level detection unit YC, detect the flow of mechanical seal water on the vapor-liquid separator of the vacuum pump through the first seal water flow detector VS, and detect the flow of mechanical seal water on the medium consistency slurry pump through the second seal water flow detector MS; when the slurry liquid level in the intermediate concentration vertical pipe is normal and the mechanical seal water flow on the vacuum pump gas-liquid separator and the mechanical seal water flow on the intermediate concentration pump are both normal, starting the intermediate concentration pump and the vacuum pump gas-liquid separator; when one or more of the slurry liquid level height in the medium-concentration vertical pipe, the mechanical seal water flow on the vacuum pump gas-liquid separator and the mechanical seal water flow on the medium-concentration slurry pump are abnormal, the medium-concentration slurry pump and the vacuum pump gas-liquid separator are immediately stopped; when the liquid level deviation of the medium-concentration vertical pipe exceeds a preset value Q, the opening degree of an upper dilution opening degree water valve F1 is increased or decreased according to the liquid level deviation; when the medium consistency pump stops running or the liquid level deviation value of the vertical pipe is lower than a preset value Q, the upper dilution opening water valve F1 is immediately closed; after the medium consistency pump operates for a preset time and the liquid level deviation exceeds a preset value M, the lower dilution opening water valve F2 is opened, dilution water is injected into the medium consistency vertical pipe, and the lower dilution opening water valve F2 is immediately closed until the liquid level deviation value is lower than a preset value Q or the medium consistency pump stops operating; when the medium consistency pump works, the vacuum pump vapor-liquid separator is utilized to suck the gas separated from the slurry when the medium consistency pump works, so that the degassing effect is achieved.
In the control method of the medium consistency pump and the conveying system thereof, when the mechanical seal water flow on the vacuum pump gas-liquid separator and the mechanical seal water flow on the medium consistency pump are lower than the minimum given flow, the medium consistency pump and the vacuum pump gas-liquid separator are shut down and an alarm is given.
In the above-described medium consistency pump and the control method of the conveying system thereof, the discharge opening degree adjusting valve F3 is opened after the medium consistency pump is started, and the discharge opening degree adjusting valve F3 is immediately closed after the medium consistency pump is stopped.
Compared with the prior art, the invention has the following advantages:
1. the invention combines the conveying impeller and the turbulence generator together for use, when the pump body works, a fluidization area is formed at the front end of the turbulence generator to fluidize slurry with medium concentration, and a fiber network structure is destroyed and separated into single fibers in the fluidization area, so that the slurry is fluidized to be similar to liquid, the conveying impeller is convenient to convey the fluidized slurry, and a gaseous separation area is formed at the top end of the turbulence generator; form gaseous separation district on turbulent generator's top, can go out the air separation in the thick liquids and leading-in to the degasification district, the gas that utilizes the degasification pipe component of being connected with the degasification district will be separated out is derived outside the pump body, thereby effectively improved well underflow pump conveying capacity, and the dorsal part center department that produces centrifugal force and make at the rotation in-process forms the fibre recovery district, utilize fibre recovery district to come to retrieve and get into row material pipe and discharge in this district the fibre that contains in the air that gaseous separation district separated out, ensure that well underflow pump can reliably operate for a long time, and can retrieve the fibre and can not have fibrous loss.
In addition, the invention can detect the slurry liquid level in the neutral density vertical pipe through the liquid level detection unit YC, and controls the dilution water to enter the pipe group to adjust the dilution water in the neutral density vertical pipe according to the detection result so as to ensure that the slurry liquid level of the neutral density vertical pipe is at a proper liquid level, thereby avoiding the situation that the slurry liquid level in the neutral density vertical pipe is too low, playing the role of automatically adjusting the slurry liquid level in the neutral density vertical pipe, avoiding the phenomena of large slurry viscosity and large conveying resistance and the situation that the slurry cannot be pumped, and connecting the vacuum pump vapor-liquid separator with a degassing conduit element on the neutral density pump to carry out vacuum exhaust so as to ensure that the neutral density slurry pump can reliably run for a long time, and respectively cooling the neutral density slurry pump and the vacuum pump vapor-liquid separator through the dilution water entering the pipe group, effectively avoids the damage of the medium consistency pump and the vacuum pump gas-liquid separator due to overhigh temperature in the working process.
2. The invention injects dilution water into the medium-concentration vertical pipe by arranging a specific dilution water inlet pipe group, mainly increases and decreases the opening degree of an upper dilution opening degree water valve F1 according to the liquid level deviation when the liquid level deviation of the medium-concentration vertical pipe exceeds a preset value Q, but the maximum opening degree should not exceed a preset maximum opening degree value; when the medium consistency pump stops running or the liquid level deviation value of the vertical pipe is lower than a preset value Q, the upper dilution opening water valve F1 is immediately closed; after the medium consistency pump operates for a preset time and the liquid level deviation exceeds a preset value M, the lower dilution opening water valve F2 is opened, dilution water is injected into the medium consistency vertical pipe, the lower dilution opening water valve F2 is immediately closed until the liquid level deviation value is lower than a preset value Q or the medium consistency pump MP stops operating, the dilution water is added into the medium consistency vertical pipe by flexibly controlling the upper dilution opening water valve F1 and the lower dilution opening water valve F2, the situation that the medium consistency vertical pipe is continuously reduced because the feeding speed of the medium consistency pump is higher than the maximum water inlet speed of the first water inlet branch pipe is avoided, at the moment, the dilution water is simultaneously added into the medium consistency vertical pipe through the first water inlet branch pipe and the second water inlet branch pipe, the situation that the dilution water is rapidly added into the medium consistency vertical pipe when the liquid level of the medium consistency vertical pipe is lower is ensured, the liquid level of the medium consistency vertical pipe is at a proper liquid level higher, and the dilution water is continuously added into the medium consistency vertical pipe through the first water inlet branch pipe, meanwhile, frequent opening of the lower dilution opening water valve F2 and the upper dilution opening water valve F1 is avoided, the medium consistency pump can continuously feed at a constant conveying speed, the feeding stability is good, when the liquid level is lowered to a lower position, the lower dilution opening water valve F2 is opened, water is injected into the medium consistency vertical pipe again, and when the liquid level in the medium consistency vertical pipe is at a proper liquid level with a high liquid level, the lower dilution opening water valve F2 is closed and circulates in sequence.
3. The invention detects the flow of the mechanical seal water on the vacuum pump steam-liquid separator by using the first seal water flow detector VS, detects the flow of the mechanical seal water on the medium consistency stock pump by using the second seal water flow detector MS, and immediately stops the medium consistency stock pump and the vacuum pump steam-liquid separator when one or more of the mechanical seal water flow on the vacuum pump steam-liquid separator and the mechanical seal water flow on the medium consistency stock pump is abnormal, so as to carry out thermal protection on the medium consistency stock pump and the vacuum pump steam-liquid separator and avoid the medium consistency stock pump and the vacuum pump steam-liquid separator from being damaged due to overhigh working temperature.
4. The invention is provided with a medium consistency pump air escape valve F4, a vacuum air escape pipe and a vacuum degree detection pressure gauge P2 on a first connecting pipe; be equipped with vacuum release valve F7 on the vacuum release pipe, be connected with the sparge water on the first connecting pipe and go into the pipe, the sparge water is gone into and is equipped with wash water valve F6 on the pipe, utilizes the sparge water to go into the pipe and washes the clear miscellaneous of centering underflow pump.
Drawings
FIG. 1 is a schematic view of the construction of a medium consistency pump of the present invention;
fig. 2 is a system block diagram of a delivery system.
1. A medium consistency vertical pipe; 2. a medium consistency pump; 3. a vacuum pump vapor-liquid separator; 4. an electrical controller; 5. sealing the cooling water inlet pipe; 6. the dilution water enters the pipe group; 7. a liquid outlet pipe; 8. a first delivery pipe; 9. a first connecting pipe; 10. a second delivery pipe; 11. a first branch pipe; 12. a second branch pipe; 13. a main water inlet pipe; 14. a dilution water pipe; 15. a dilution water nozzle; 16. a first water inlet branch pipe; 17. a second water inlet branch pipe; 18. a vacuum release pipe; 19. introducing washing water into a pipe; 20. a pump body; 21. a rotating shaft; 22. a conveying impeller; 23. a fluidization region; 24. a gaseous separation zone; 25. a pumping zone; 26. a fiber recovery zone; 27. a degassing zone; 28. a mechanical seal; 29. a cooling water pipe; 30. a pulp inlet pipe; 31. a pulp outlet pipe; 32. a turbulence generator; 33. a discharge pipe; 34. a slurry injection pipe; 35. and detecting the pipe orifice.
Detailed Description
The invention is further illustrated by the following figures and examples, which are not to be construed as limiting the invention.
The embodiment is as follows: a medium consistency pump and a conveying system thereof, as shown in fig. 1-2, including a medium consistency pump 2, wherein the medium consistency pump 2 includes a pump body 20, a slurry inlet pipe 30 and a slurry outlet pipe 31 are arranged on the pump body 20, a rotating shaft 21 is arranged in the pump body 20, a conveying impeller 22 is arranged on the rotating shaft 21, a turbulence generator 32 is arranged at the front end of the conveying impeller 22, the turbulence generator 32 is arranged coaxially with the conveying impeller 22, a fluidizing region 23 is formed at the front end of the turbulence generator 32, a gaseous separating region 24 is formed at the top end of the turbulence generator 32, a pumping region 25 is formed between the impeller of the conveying impeller 22 and the chamber of the pump body 20, the conveying impeller 22 generates centrifugal force during rotation to form a degassing region 27 between the back side of the conveying impeller 22 and the chamber side wall of the pump body 20, and a fiber recovering region 26 is formed at the center of the back side of the conveying impeller 22, the rotating shaft 21 is sealed with the pump body 20 through a mechanical seal 28, a cooling water pipe 29 is arranged in the mechanical sealing element 28; the pump body 20 is provided with a discharge pipe 33 connected with the fiber recovery area 26; the pump body 20 is provided with a degassing conduit element connected with a degassing area 27; the invention combines the conveying impeller 22 and the turbulence generator 32 for use, when the pump body 20 works, a fluidization area 23 is formed at the front end of the turbulence generator 32 to fluidize the pulp with medium concentration, and a fiber network structure is destroyed and separated into single fibers in the fluidization area 23, so that the pulp is fluidized to be similar to liquid, the conveying impeller 22 is convenient to convey the fluidized pulp, and a gaseous separation area 24 is formed at the top end of the turbulence generator 32; form gaseous state separation region 24 at turbulence generator 32's top, can go out the air separation in the thick liquids and leading-in to the degasification district 27, utilize the degasification pipe component of being connected with degasification district 27 to lead out the gas of going out outside pump body 20, thereby effectively improved middling slurry pump 2 conveying capacity, and the dorsal part center department that produces centrifugal force and make at the rotation in-process forms fibre recovery region 26, utilize fibre recovery region 26 to retrieve and get into row material pipe 33 and discharge in this district the fibre that contains in the air that gaseous state separation region 24 separated out, ensure that middling slurry pump 2 can reliably operate for a long time, and can retrieve the fibre and do not have the loss of fibre.
The device is characterized by further comprising a conveying system, wherein the conveying system is composed of a medium-consistency vertical pipe 1, a medium-consistency slurry pump 2, a vacuum pump steam-liquid separator 3, an electric controller 4 and a sealing cooling water inlet pipe 5, a dilution water inlet pipe group 6 is connected to the medium-consistency vertical pipe 1, a liquid outlet pipe 7 is arranged at the bottom of the medium-consistency vertical pipe 1, the liquid outlet pipe 7 is connected with a slurry inlet pipe 30 of the medium-consistency slurry pump 2 through a first conveying pipe 8, and a degassing conduit element on the medium-consistency slurry pump 2 is connected with an air inlet pipe of the vacuum pump steam-liquid separator 3 through a first connecting pipe 9; be connected with second conveyer pipe 10 on the play thick liquid pipe on the well thick liquid pump 2, the tip of second conveyer pipe 10 is equipped with out thick liquid aperture governing valve F3, mechanical seal inlet tube on the vacuum pump vapour and liquid separator 3 is gone into pipe 5 through first branch pipe 11 and seal cooling water and is connected, condenser pipe on the well thick liquid pump 2 is gone into pipe 5 through second branch pipe 12 and seal cooling water and is connected, be equipped with liquid level detection unit YC in the well thick vertical pipe 1, liquid level detection unit YC, well thick liquid pump 2, vacuum pump vapour and liquid separator 3 all are connected with 4 electricity of electropneumatic controller. In addition, the invention can transmit the slurry by arranging a specific transmission system containing the medium consistency pump 2, ensure that the medium consistency pump 2 can continuously operate efficiently and safely, detect the slurry liquid level in the medium consistency vertical pipe 1 by the liquid level detection unit YC, control the dilution water to enter the pipe group 6 to adjust the dilution water in the medium consistency vertical pipe 1 according to the detection result, ensure that the slurry liquid level of the medium consistency vertical pipe 1 is at a proper liquid level, thereby avoiding the situation that the slurry liquid level in the medium consistency vertical pipe 1 is too low, playing the role of automatically adjusting the slurry liquid level in the medium consistency vertical pipe 1, avoiding the phenomena of large slurry viscosity and large transmission resistance and the situation that pumping cannot be carried out, connecting the vacuum pump steam-liquid separator 3 with a degassing conduit element on the medium consistency pump 2 to carry out vacuum exhaust so as to ensure that the medium consistency pump 2 can operate reliably for a long time, and the dilute water enters the pipe group 6 to respectively carry out water cooling on the medium-consistency slurry pump 2 and the vacuum pump vapor-liquid separator 3, thereby effectively avoiding the medium-consistency slurry pump 2 and the vacuum pump vapor-liquid separator 3 from being damaged due to overhigh temperature in the working process. And a slurry injection pipe 34 is arranged on the medium concentration vertical pipe 1. The second conveying pipe 10 is provided with a detection pipe opening 35, and the detection pipe opening 35 is provided with a detection opening and closing valve F8. When the liquid level in the medium concentration vertical pipe 1 exceeds the highest alarm liquid level for a preset time, a feeding stopping signal is sent to the previous process so as to stop feeding. The high limit alarm and the low limit alarm and the time delay alarm signal function are set for the liquid level of the medium concentration vertical pipe 1. When the medium consistency pump 2 is operated but the vacuum pump vapor-liquid separator 3 is not started, an alarm is given.
The dilution water inlet pipe group 6 comprises a water inlet main pipe 13, a dilution water stop valve F0 and a dilution water pressure gauge P1 are arranged on the water inlet main pipe 13, a dilution water pipe 14 is arranged at the lower end of the medium concentration vertical pipe 1, a dilution water nozzle 15 is arranged at the top end of the medium concentration vertical pipe 1, a first water inlet branch pipe 16 is connected between the water inlet main pipe 13 and the dilution water pipe 14, the water inlet main pipe 13 and the dilution water nozzle 15 are connected through a second water inlet branch pipe 17, and a lower dilution opening degree adjusting valve F2 is arranged on the first water inlet branch pipe 16; the second water inlet branch pipe 17 is provided with an upper dilution opening regulating valve F1, dilution water is added inwards by flexibly controlling an upper dilution opening water valve F1 and a lower dilution opening water valve F2, so that the situation that the intermediate-concentration vertical pipe 1 is continuously reduced because the feeding speed of the intermediate-concentration slurry pump 2 is higher than the maximum water inlet speed of the first water inlet branch pipe 16 is avoided, dilution water is simultaneously added into the intermediate-concentration vertical pipe 1 through the first water inlet branch pipe 16 and the second water inlet branch pipe 17 at the same time, the situation that the dilution water can be rapidly added into the intermediate-concentration vertical pipe 1 when the liquid level of the intermediate-concentration vertical pipe 1 is lower is ensured, the liquid level of the intermediate-concentration vertical pipe 1 is in a proper liquid level with higher liquid level, the dilution water is continuously added into the intermediate-concentration vertical pipe 1 through the first water inlet branch pipe 16, the frequent opening of the lower dilution opening water valve F2 and the upper dilution opening water valve F1 is avoided, and the intermediate-concentration slurry pump 2 can continuously feed at a constant conveying speed, the feeding stability is good, when the liquid level is lowered to a lower position, the lower dilution opening water valve F2 is opened, water is injected into the middle concentration vertical pipe 1 again, and when the liquid level in the middle concentration vertical pipe 1 is at a proper liquid level with a high liquid level, the lower dilution opening water valve F2 is closed to cycle sequentially.
The system is characterized in that a first sealing water flow detector VS is arranged on the first branch pipe 11, a second sealing water flow detector MS is arranged on the second branch pipe 12, the first sealing water flow detector VS is used for detecting the flow of mechanical sealing water on the vacuum pump gas-liquid separator 3, the second sealing water flow detector MS is used for detecting the flow of the mechanical sealing water on the medium consistency pump 2, when one or more of the mechanical sealing water flow on the vacuum pump gas-liquid separator 3 and the mechanical sealing water flow on the medium consistency pump 2 are abnormal, the medium consistency pump 2 and the vacuum pump gas-liquid separator 3 are immediately stopped to carry out thermal protection on the medium consistency pump 2 and the vacuum pump gas-liquid separator 3, and the situation that the medium consistency pump 2 and the vacuum pump gas-liquid separator 3 are damaged due to overhigh working temperature is avoided.
The first connecting pipe 9 is provided with a medium consistency pump air release valve F4, a vacuum air release pipe 18 and a vacuum degree detection pressure gauge P2; the vacuum air release pipe 18 is provided with a vacuum air release valve F7, the first connecting pipe 9 is connected with flushing water inlet pipe 19, the flushing water inlet pipe 19 is provided with a flushing water valve F6, and the flushing water inlet pipe 19 is used for flushing impurities of the medium-consistency slurry pump 2.
The dilution water stop valve F0, the upper dilution opening regulating valve F1, the lower dilution opening regulating valve F2, the slurry outlet opening regulating valve F3, the medium consistency pump air release valve F4, the sealing water stop valve F5, the flushing water valve F6, the vacuum air release valve F7, the first sealing water flow detector VS and the second sealing water flow detector MS are respectively and electrically connected with the electric controller 4.
The control method of the conveying system comprises the steps that the liquid level height of slurry in the vertical centering pipe is detected through a liquid level detection unit YC, the flow of mechanical seal water on a vapor-liquid separator of a vacuum pump is detected through a first seal water flow detector VS, and the flow of the mechanical seal water on a centering slurry pump is detected through a second seal water flow detector MS; when the slurry liquid level in the intermediate concentration vertical pipe is normal and the mechanical seal water flow on the vacuum pump gas-liquid separator and the mechanical seal water flow on the intermediate concentration pump are both normal, starting the intermediate concentration pump and the vacuum pump gas-liquid separator; when one or more of the slurry liquid level height in the medium-concentration vertical pipe, the mechanical seal water flow on the vacuum pump gas-liquid separator and the mechanical seal water flow on the medium-concentration slurry pump are abnormal, the medium-concentration slurry pump and the vacuum pump gas-liquid separator are immediately stopped; when the liquid level deviation of the medium-concentration vertical pipe exceeds a preset value Q, the opening degree of an upper dilution opening degree water valve F1 is increased or decreased according to the liquid level deviation; when the medium consistency pump stops running or the liquid level deviation value of the vertical pipe is lower than a preset value Q, the upper dilution opening water valve F1 is immediately closed; after the medium consistency pump operates for a preset time and the liquid level deviation exceeds a preset value M, the lower dilution opening water valve F2 is opened, dilution water is injected into the medium consistency vertical pipe, and the lower dilution opening water valve F2 is immediately closed until the liquid level deviation value is lower than a preset value Q or the medium consistency pump stops operating; when the medium consistency pump works, the vacuum pump vapor-liquid separator is utilized to suck the gas separated from the slurry when the medium consistency pump works, so that the degassing effect is achieved.
And when the mechanical seal water flow on the vacuum pump gas-liquid separator and the mechanical seal water flow on the medium consistency pump are lower than the minimum given flow, stopping the medium consistency pump and the vacuum pump gas-liquid separator and giving an alarm.
The discharge opening degree adjusting valve F3 is opened after the medium consistency pump is started, and the discharge opening degree adjusting valve F3 is immediately closed after the medium consistency pump is stopped.
The working principle is as follows: the invention combines the conveying impeller 22 and the turbulence generator 32 for use, when the pump body 20 works, a fluidization area 23 is formed at the front end of the turbulence generator 32 to fluidize the pulp with medium concentration, and a fiber network structure is destroyed and separated into single fibers in the fluidization area 23, so that the pulp is fluidized to be similar to liquid, the conveying impeller 22 is convenient to convey the fluidized pulp, and a gaseous separation area 24 is formed at the top end of the turbulence generator 32; form gaseous state separation region 24 at turbulence generator 32's top, can go out the air separation in the thick liquids and leading-in to the degasification district 27, utilize the degasification pipe component of being connected with degasification district 27 to lead out the gas of going out outside pump body 20, thereby effectively improved middling slurry pump 2 conveying capacity, and the dorsal part center department that produces centrifugal force and make at the rotation in-process forms fibre recovery region 26, utilize fibre recovery region 26 to retrieve and get into row material pipe 33 and discharge in this district the fibre that contains in the air that gaseous state separation region 24 separated out, ensure that middling slurry pump 2 can reliably operate for a long time, and can retrieve the fibre and do not have the loss of fibre.
In addition, the invention can transmit the slurry by arranging a specific transmission system containing the medium consistency pump 2, ensure that the medium consistency pump 2 can continuously operate efficiently and safely, detect the slurry liquid level in the medium consistency vertical pipe 1 by the liquid level detection unit YC, control the dilution water to enter the pipe group 6 to adjust the dilution water in the medium consistency vertical pipe 1 according to the detection result, ensure that the slurry liquid level of the medium consistency vertical pipe 1 is at a proper liquid level, thereby avoiding the situation that the slurry liquid level in the medium consistency vertical pipe 1 is too low, playing the role of automatically adjusting the slurry liquid level in the medium consistency vertical pipe 1, avoiding the phenomena of large slurry viscosity and large transmission resistance and the situation that pumping cannot be carried out, connecting the vacuum pump steam-liquid separator 3 with a degassing conduit element on the medium consistency pump 2 to carry out vacuum exhaust so as to ensure that the medium consistency pump 2 can operate reliably for a long time, and the dilute water enters the pipe group 6 to respectively carry out water cooling on the medium-consistency slurry pump 2 and the vacuum pump vapor-liquid separator 3, thereby effectively avoiding the medium-consistency slurry pump 2 and the vacuum pump vapor-liquid separator 3 from being damaged due to overhigh temperature in the working process.
Claims (9)
1. Well underflow pump and conveying system thereof, its characterized in that: including well thick liquid pump (2), well thick liquid pump (2) are including the pump body (20), are equipped with into thick liquid pipe (30) and play thick liquid pipe (31) on the pump body (20), be equipped with pivot (21) in the pump body (20), be equipped with delivery impeller (22) on pivot (21), the front end of delivery impeller (22) is equipped with turbulence generator (32), turbulence generator (32) and delivery impeller (22) coaxial arrangement, the front end of turbulence generator (32) forms fluidization region (23), the top of turbulence generator (32) forms gaseous state disengagement zone (24), form pumping region (25) between the cavity of the impeller of delivery impeller (22) and pump body (20), delivery impeller (22) produce centrifugal force and make in the rotation process and remove gas region (27) between the cavity lateral wall of the pump body (20), and a fiber recovery area (26) is formed at the center of the back side of the conveying impeller (22), the rotating shaft (21) is sealed with the pump body (20) through a mechanical sealing piece (28), and a cooling water pipe (29) is arranged in the mechanical sealing piece (28); a discharge pipe (33) connected with the fiber recovery area (26) is arranged on the pump body (20); a degassing conduit element connected with the degassing area (27) is arranged on the pump body (20);
the device is characterized by also comprising a conveying system, wherein the conveying system consists of a medium-consistency vertical pipe (1), a medium-consistency slurry pump (2), a vacuum pump vapor-liquid separator (3), an electric controller (4) and a sealing cooling water inlet pipe (5), a dilution water inlet pipe group (6) is connected to the medium-consistency vertical pipe (1), a liquid outlet pipe (7) is arranged at the bottom of the medium-consistency vertical pipe (1), the liquid outlet pipe (7) is connected with a slurry inlet pipe (30) of the medium-consistency slurry pump (2) through a first conveying pipe (8), and a degassing conduit element on the medium-consistency slurry pump (2) is connected with an air inlet pipe of the vacuum pump vapor-liquid separator (3) through a first connecting pipe (9); be connected with second conveyer pipe (10) on the play thick liquid pipe on well thick liquid pump (2), the tip of second conveyer pipe (10) is equipped with out thick liquid aperture governing valve F3, the mechanical seal inlet tube on vacuum pump vapour and liquid separator (3) is gone into pipe (5) through first branch pipe (11) and sealed cooling water and is connected, the cooling water pipe on well thick liquid pump (2) is gone into pipe (5) through second branch pipe (12) and sealed cooling water and is connected, be equipped with liquid level detection unit YC in well thick riser (1), liquid level detection unit YC, well thick liquid pump (2), vacuum pump vapour and liquid separator (3) all are connected with electropneumatic controller (4) electricity.
2. The medium consistency pump and the conveying system thereof as claimed in claim 1, wherein: the dilution water inlet pipe group (6) comprises a water inlet main pipe (13), a dilution water stop valve F0 and a dilution water pressure gauge P1 are arranged on the water inlet main pipe (13), a dilution water pipe (14) is arranged at the lower end of the medium concentration vertical pipe (1), a dilution water nozzle (15) is arranged at the top end of the medium concentration vertical pipe (1), a first water inlet branch pipe (16) is connected between the water inlet main pipe (13) and the dilution water pipe (14), the water inlet main pipe (13) and the dilution water nozzle (15) are connected through a second water inlet branch pipe (17), and a lower dilution opening degree adjusting valve F2 is arranged on the first water inlet branch pipe (16); and an upper dilution opening regulating valve F1 is arranged on the second water inlet branch pipe (17).
3. The medium consistency pump and the conveying system thereof as claimed in claim 2, wherein: and a first sealing water flow detector VS is arranged on the first branch pipe (11), and a second sealing water flow detector MS is arranged on the second branch pipe (12).
4. A medium consistency pump and its delivery system as defined in claim 3, wherein: and a sealing water stop valve F5 is arranged on the sealing cooling water inlet pipe (5).
5. The medium consistency pump and the conveying system thereof as claimed in claim 4, wherein: the first connecting pipe (9) is provided with a medium consistency pump air release valve F4, a vacuum air release pipe (18) and a vacuum degree detection pressure gauge P2; be equipped with vacuum release valve F7 on vacuum release pipe (18), be connected with the sparge water on first connecting tube (9) and go into pipe (19), be equipped with wash water valve F6 on the sparge water pipe (19).
6. The medium consistency pump and the conveying system thereof as claimed in claim 5, wherein: the dilution water stop valve F0, the upper dilution opening regulating valve F1, the lower dilution opening regulating valve F2, the slurry outlet opening regulating valve F3, the medium consistency pump air release valve F4, the sealing water stop valve F5, the flushing water valve F6, the vacuum air release valve F7, the first sealing water flow detector VS and the second sealing water flow detector MS are respectively and electrically connected with the electric controller (4).
7. The control method for implementing the medium consistency pump and the conveying system thereof as claimed in claim 6 is characterized in that: the control method of the conveying system comprises the steps of detecting the liquid level height of slurry in the vertical centering pipe through a liquid level detection unit YC, detecting the flow of mechanical seal water on a vapor-liquid separator of a vacuum pump through a first seal water flow detector VS, and detecting the flow of the mechanical seal water on a centering thick slurry pump through a second seal water flow detector MS; when the slurry liquid level in the intermediate concentration vertical pipe is normal and the mechanical seal water flow on the vacuum pump gas-liquid separator and the mechanical seal water flow on the intermediate concentration pump are both normal, starting the intermediate concentration pump and the vacuum pump gas-liquid separator; when one or more of the slurry liquid level height in the medium-concentration vertical pipe, the mechanical seal water flow on the vacuum pump gas-liquid separator and the mechanical seal water flow on the medium-concentration slurry pump are abnormal, the medium-concentration slurry pump and the vacuum pump gas-liquid separator are immediately stopped; when the liquid level deviation of the medium-concentration vertical pipe exceeds a preset value Q, the opening of an upper dilution opening regulating valve F1 is increased or decreased according to the liquid level deviation; when the medium consistency pump stops running or the liquid level deviation value of the vertical pipe is lower than a preset value Q, the upper dilution opening regulating valve F1 is immediately closed; after the medium consistency pump operates for a preset time and the liquid level deviation exceeds a preset value M, the lower dilution opening regulating valve F2 is opened, dilution water is injected into the medium consistency vertical pipe, and the lower dilution opening regulating valve F2 is immediately closed until the liquid level deviation value is lower than a preset value Q or the medium consistency pump stops operating; when the medium consistency pump works, the vacuum pump vapor-liquid separator is utilized to suck the gas separated from the slurry when the medium consistency pump works, so that the degassing effect is achieved.
8. The medium consistency pump and the control method of the conveying system thereof according to claim 7, characterized in that: when the mechanical seal water flow on the vacuum pump vapor-liquid separator and the mechanical seal water flow on the medium consistency pump are lower than the minimum given flow, the medium consistency pump and the vacuum pump vapor-liquid separator are shut down and alarm is given.
9. The medium consistency pump and the control method of the conveying system thereof according to claim 7, characterized in that: the discharge opening degree adjusting valve F3 is opened after the medium consistency pump is started, and the discharge opening degree adjusting valve F3 is immediately closed after the medium consistency pump is stopped.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011527387.8A CN112648191B (en) | 2020-12-22 | 2020-12-22 | Medium consistency stock pump and conveying system thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011527387.8A CN112648191B (en) | 2020-12-22 | 2020-12-22 | Medium consistency stock pump and conveying system thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112648191A CN112648191A (en) | 2021-04-13 |
| CN112648191B true CN112648191B (en) | 2022-07-19 |
Family
ID=75359017
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011527387.8A Active CN112648191B (en) | 2020-12-22 | 2020-12-22 | Medium consistency stock pump and conveying system thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112648191B (en) |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6692234B2 (en) * | 1999-03-22 | 2004-02-17 | Water Management Systems | Pump system with vacuum source |
| CN201539415U (en) * | 2009-10-30 | 2010-08-04 | 华南理工大学 | Medium-consistency slurry pump system device |
| CN201836059U (en) * | 2010-06-01 | 2011-05-18 | 杭州萧山美特轻工机械有限公司 | Turbulent medium-consistency stuff pump with variable helical angles |
| CN105780573B (en) * | 2016-04-14 | 2017-11-07 | 华南理工大学 | A kind of middle underflow pump standpipe liquid level Automatic adjustment method |
-
2020
- 2020-12-22 CN CN202011527387.8A patent/CN112648191B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN112648191A (en) | 2021-04-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103874641B (en) | Separator and method for pneumatic type materiel delivery system | |
| CN103061384B (en) | Secondary-pressurizing energy-saving water-supply system for high-rise building and energy-saving water supply method | |
| CN112648191B (en) | Medium consistency stock pump and conveying system thereof | |
| CN103908159B (en) | Quick defoaming method for soybean milk machine | |
| US5338341A (en) | Separator for removing gases from water | |
| CN106437840A (en) | Negative pressure water tank based automatic drainage device for mining and drainage method thereof | |
| US5324166A (en) | Apparatus and method for pumping a liquid | |
| CN110668520B (en) | Method and device for removing hydrogen in electrolytic ship ballast water management system | |
| CN106823876A (en) | A kind of device for matching somebody with somebody liquid for emulsion | |
| CN103790059A (en) | Device and method for medium-concentration beating fed through medium-concentration pulp pump | |
| CN103644090B (en) | A kind of liquid vapour jet-type takes out negative pressure system and controlling method thereof | |
| CN206746336U (en) | A kind of device for matching somebody with somebody liquid for emulsion | |
| CN113398844A (en) | Negative pressure automatic liquid discharge recovery kettle | |
| CN210511636U (en) | Drainage control system of condensate water tank | |
| CN210595236U (en) | Liquid pumping device | |
| CN102207356B (en) | Method and system for controlling stagnation and blockage of condenser in circulating water waste heat recovery system | |
| JP2696124B2 (en) | Steam turbine equipment | |
| CN220622121U (en) | Liquid discharge vacuum pump system | |
| CN104197197A (en) | On-line switching method for slurry and water in long-distance slurry pipeline transportation system | |
| CN210369289U (en) | Circulation system for dredging tunnel | |
| CN220238183U (en) | Device for recycling waste heat of cyclohexanol dehydrogenation reaction product | |
| CN210845363U (en) | Exhaust device for discharging air bubbles in high-pressure water pipeline | |
| CN209238195U (en) | A kind of separator of diethyldithiocarbamate | |
| CN212025373U (en) | Stem cell culture perfusion device | |
| CN210495691U (en) | Gas-liquid separation tank |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |