CN111852860A - Gas-liquid mixing and conveying device with three-jaw rotor - Google Patents
Gas-liquid mixing and conveying device with three-jaw rotor Download PDFInfo
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- CN111852860A CN111852860A CN202010541636.2A CN202010541636A CN111852860A CN 111852860 A CN111852860 A CN 111852860A CN 202010541636 A CN202010541636 A CN 202010541636A CN 111852860 A CN111852860 A CN 111852860A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
- F04C18/08—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
- F04C18/12—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type
- F04C18/14—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons
- F04C18/18—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons with similar tooth forms
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
- F04C18/08—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
- F04C18/082—Details specially related to intermeshing engagement type pumps
- F04C18/084—Toothed wheels
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C23/00—Combinations of two or more pumps, each being of rotary-piston or oscillating-piston type, specially adapted for elastic fluids; Pumping installations specially adapted for elastic fluids; Multi-stage pumps specially adapted for elastic fluids
- F04C23/02—Pumps characterised by combination with or adaptation to specific driving engines or motors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
- F04C29/04—Heating; Cooling; Heat insulation
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04F—PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED; SIPHONS
- F04F5/00—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow
- F04F5/14—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being elastic fluid
- F04F5/24—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being elastic fluid displacing liquids, e.g. containing solids, or liquids and elastic fluids
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04F—PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED; SIPHONS
- F04F5/00—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow
- F04F5/54—Installations characterised by use of jet pumps, e.g. combinations of two or more jet pumps of different type
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Jet Pumps And Other Pumps (AREA)
- Applications Or Details Of Rotary Compressors (AREA)
Abstract
The invention discloses a gas-liquid mixing and conveying device with a three-jaw rotor, which comprises a displacement pump, a heat exchanger and a Venturi tube, wherein the heat exchanger comprises a gas inlet, a gas outlet and a condensate outlet, the gas inlet is a medium inlet, the gas outlet is connected with an inlet of the displacement pump, an outlet of the displacement pump is connected with an inlet of the Venturi tube, and the condensate outlet is connected with a throat tube of the Venturi tube. The positive displacement pump comprises a plurality of stages of compression stages, each stage of compression stage comprises a partition plate, a first rotor, a second rotor, a pump cover, an air inlet pipe and an air outlet pipe, the two rotors are mutually meshed in the pump cover, and the air inlet and the air outlet of each stage of compression stage form a serial or parallel connection relationship through the air inlet pipe and the air outlet pipe; when in series connection: the compression stage interstage and the first stage inlet are both provided with heat exchangers, and the last stage compression stage air outlet pipe is connected with the inlet of the venturi tube; when in parallel connection: the heat exchangers are respectively arranged in front of the plurality of compression stages or share one heat exchanger, and the outlet gas of the plurality of compression stages is collected and then connected with the inlet of the Venturi tube.
Description
Technical Field
The invention relates to the field of gas-liquid conveying devices, in particular to a gas-liquid mixing conveying device with a three-jaw rotor.
Background
In many chemical processes, it is common to encounter gas-liquid mixtures for transport or, although the original medium is in the gas phase, but the liquid phase is separated out when the pressure is slightly increased, the gas-liquid two-phase state of most of the media is related to the pressure and the temperature, for example, water, the water vapor under normal pressure is changed into liquid when the temperature is reduced to be lower than 100 ℃, the water vapor is separated from the gas, likewise, the water vapor under 150 ℃ is isothermally compressed, the water vapor can still be forced to be changed into the liquid, therefore, if the process medium directly enters the displacement pump for compression, the condensable substances in the process medium can be separated out from the gas phase, and the diaphragm type displacement pump with low removal efficiency can simultaneously process two phases, such as a screw pump, a gear pump and a claw pump, which are inconvenient for processing the medium with liquid, the work performance is reduced, but also can damage the machine, and the diaphragm pump is used for gas-liquid conveying, and not only the flow is lower, but also the outlet pressure fluctuation degree is large.
In the prior art, the components of the process medium are changed by either forced cooling of the gas before the gas enters the delivery pump to separate out the condensate and draining the condensate or addition of a polymerization inhibitor and a pour inhibitor before the process medium enters the delivery pump, and subsequent treatment is required to change the original components in many process flows: the first method has the problem of uneven mixing when the condensate is directly pressurized and injected into the high-pressure gas in the subsequent steps; in the second method, not only can no proper polymerization inhibitor or retarder be found, but also the subsequent separation is troublesome.
In addition, when gas is pressurized and conveyed, because single-stage boosting is not enough, multi-stage compression is often used, the multi-stage gas booster pump in the prior art is compact or considered in other aspects, inter-stage flow channels are all positioned in the pump, and only a first-stage gas inlet and a last-stage gas outlet are arranged outside, so that the design only has the problem of heat dissipation for pure dry gas, and because the compression heat of multi-stage compression needs to be dissipated, a pump body is often provided with a plurality of complex internal cooling water flow channels to prevent the excessive temperature rise of the machine from influencing a plurality of fit clearances in the pump body, and the clearances are all crucial to the work of the pump; for the working condition containing condensable medium, the multi-stage gas booster pumps all select hard resistance, are easy to damage and require frequent maintenance. The heat dissipation of the gas delivery pump starts from external conditions, how to enhance the heat dissipation performance is considered, and the heat dissipation performance is not considered from the compression ratio and the periodic gas quantity of the heat source body-process gas.
Disclosure of Invention
The invention aims to provide a gas-liquid mixing and conveying device with a three-jaw rotor, which is used for solving the problems in the prior art.
In order to achieve the purpose, the invention provides the following technical scheme:
The utility model provides a gas-liquid mixture conveyor with three-jaw rotor, includes displacement pump, heat exchanger and venturi, and the heat exchanger includes that air inlet, gas outlet and lime set export, and the air inlet is the medium entry, and the displacement pump import is connected to the gas outlet, and the venturi import is connected to the displacement pump export, and the lime set exit linkage venturi choke.
The invention condenses the condensable matter in the process gas in advance by a cooling method, the condensable matter is led to the throat part of the Venturi tube through a condensate outlet, the dry gas is led to the displacement pump for compression and pressure boosting, the boosted gas enters from the main gas inlet of the Venturi tube, the condensate liquid discharged from the heat exchanger is pumped in the throat part, and the condensate liquid is mixed together and discharged to a high-pressure area. The amplitude of the temperature reduction of the process medium by the heat exchanger is related to the pressure increasing ratio of the displacement pump, as long as the liquid substance does not appear in the process medium after the pressure is increased, the temperature reduction amplitude is achieved, and according to different media processed by the device, the temperature reduction requirement is calculated by searching a gas-liquid balance curve chart of the medium, and then the proper cooling water temperature and flow are selected. The condensate condensed by the heat exchanger is a part of the original process medium, and is mixed with the gas phase through the Venturi tube at the tail end of the device to be output outwards, so that the purpose of not changing the process components is achieved, and the mixing of the inner throat part of the Venturi tube is carried out under the high-speed flow, so that the mixing is very uniform.
Furthermore, the positive displacement pump comprises a plurality of stages of compression stages, each stage of compression stage comprises a partition plate, a first rotor, a second rotor, a pump cover, an air inlet pipe and an air outlet pipe, the partition plate and the pump cover are locked in series by using a fastening piece, the first rotor and the second rotor which are meshed with each other are arranged in the pump cover, the air inlet and the air outlet of each stage of compression stage are connected to the outside of the pump through the air inlet pipe and the air outlet pipe, and each stage of compression stage is connected in series or in parallel;
when in series connection: the gas-liquid mixing conveying device is provided with heat exchangers of which the number is the same as that of the compression stages of the displacement pump in series, the heat exchanger is arranged between a gas inlet pipe of each stage of compression stage and a gas outlet pipe of the preceding stage of compression stage, and the gas outlet pipe of the last stage of compression stage is connected with an inlet of a venturi tube;
when in parallel connection: the heat exchangers are respectively arranged in front of the plurality of compression stages or share one heat exchanger, and the outlet gas of the plurality of compression stages is collected and then connected with the inlet of the Venturi tube.
The compression stage that baffle, first rotor, second rotor, pump cover, intake pipe and outlet duct constitute can a lot of establish ties on a pump, as long as the intensity of main shaft is enough.
When the series connection is used, can reach multistage pressure boost purpose, moreover, all add the heat exchanger between stage and the stage, can effectively take away the produced heat of each level compression, prevent the gas of last one-level because the acting power of overheated influence next stage rotor part, moreover, the heat exchanger is hardly just can condense out with the whole condensation of the congealable matter in the medium at the first level, because pressure this moment is lower, need very low temperature just can condense out the condensate that just appeared when the last compression, so hierarchical cooling, not only effectively take away the heat of each level, but also condense out the condensate under the different pressure points respectively, reduce the performance demand of first level heat exchanger.
The compression stages are connected in parallel, which can increase the gas handling capacity of the device.
The first rotor and the second rotor are claw-shaped rotors, the compression stage further comprises an air inlet disc and an air outlet disc, the air inlet disc and the air outlet disc are arranged on the end face of the pump cover, the circle center of the air inlet disc is located on the axis of the first rotor, the circle center of the air outlet disc is located on the axis of the second rotor, mounting lugs are arranged on the end faces, away from the rotors, of the air inlet disc and the air outlet disc in the radial direction respectively, mounting holes corresponding to the mounting lugs are formed in the end face, away from the rotors, of the pump cover, the number of the mounting holes is more than that of the mounting lugs, and sealing rings are arranged on cylindrical contact faces, with the; an air inlet hole is formed in the disc surface of the air inlet disc, one end of the air inlet hole faces the first rotor, the other end of the air inlet hole is connected with the air inlet pipe, an air outlet hole is formed in the disc surface of the air outlet disc, and one end of the air outlet hole faces the second rotor and the other end of the air outlet hole is connected with the air outlet pipe.
The external connecting ports of the compression cavity where the rotor is located are respectively an air inlet hole and an air outlet hole, the air inlet and exhaust flow principle of the claw pump is elaborated in the prior art, the invention is not repeated, the air inlet and exhaust port is arranged on a disc, particularly the air inlet hole is arranged on an air inlet disc which can rotate around the axis of the first rotor, the air inlet disc is fixed on the end surface of the pump cover through an installation lug, the installation holes on the end surface of the pump cover are multiple, the installation lug can select the installation holes with proper angle positions according to requirements to install, the installation lugs are installed on different angles, the air inlet disc is set with the rotation angle, the position of the air inlet hole relative to the first rotor can be changed, the air inlet amount is different in one period due to different positions of the air inlet hole, when the claw tip of the first rotor just needs to be swept to the cavity wall, if the, the suction is the greatest at this inlet disc angle. The single-period air suction quantity is changed from the heat dissipation consideration, although a heat exchanger is arranged between stages for carrying away heat when each compression stage of the device is used in series, the heat of compression in a single compression stage can only be dissipated through a pump body, the heat is related to the compression ratio and the gas quantity of single-stage compression, and the compression ratio is an amount which is inconvenient to change, because the heat is determined by the inlet and outlet pressure value of the device, the single-period air suction quantity belongs to a process part served by the device, the priority of parameters of the process part is the highest and cannot be changed, the single-period air suction quantity in the device can be controlled to change the heat quantity of the single stage, the smaller the air suction quantity is, the smaller the heat quantity is, the single-period air suction quantity is suitable for being used in the severe surrounding environment, such as unsmooth ventilation and the like, and the reduction.
Preferably, the first rotor and the second rotor are three-jaw rotors. Compared with a two-claw rotor, the three-claw rotor has better air inlet and outlet uniformity, the exhaust air volume and the pressure fluctuation are small, and the fluctuation degree of condensate liquid is reduced in the Venturi tube in the follow-up process of pumping and discharging. Of course, four claws and five claws have smaller exhaust fluctuation, but the number of the claws is increased, the air quantity change range of the air inlet disc is reduced, and therefore the number of the claws is three.
Preferably, the heat exchanger is a shell and tube heat exchanger, the heat exchanger is arranged vertically, the process medium conveyed by the gas-liquid mixing and conveying device passes through the tube pass of the heat exchanger, the gas inlet is arranged below the gas outlet, the gas outlet is arranged above the gas inlet, and the condensate outlet is positioned on the side of the gas inlet.
The shell and tube heat exchanger is vertically arranged, a condensate outlet is arranged below the shell and tube heat exchanger, and liquid condensed in the gas rising process flows to the lower part, so that the gas discharged from the upper outlet is dry.
The gas phase stop valve is arranged on a connecting pipeline from a condensate outlet to a venturi tube throat and comprises a section of pipe body, a valve ball, a valve pad and a blocking net, wherein the inlet and the outlet of the gas phase stop valve are respectively arranged at two ends of the pipe body, the diameter of the inlet is larger than that of the outlet, the annular valve pad is arranged on the inner surface of a pipe diameter change section of the pipe body, the blocking net is arranged on the inlet side in the pipe body, the blocking net and the valve pad are provided with the valve ball, and the outer diameter of the valve ball is larger than that of the outlet; the outlet is connected with the venturi tube throat, the inlet is connected with the condensate outlet, the outlet faces downwards, and the inlet is arranged upwards.
Liquid is from last down flowing into gaseous phase stop valve, and the valve ball is hollow, and density is less than liquid greatly, receives the buoyancy come-up, opens the flow channel down, thereby the lime set can pass through, and the lime set in the heat exchanger is clean by the suction, and gaseous phase down arrives valve ball department, and gaseous buoyancy does not enough hold up the valve ball, and the valve ball drops and contacts with the valve pad to end the gaseous phase.
The gas phase stop valve is arranged to ensure that the total efficiency of the device is higher, because the working efficiency of the claw pump is higher relative to a Venturi tube (equivalent to a jet pump) when gas is conveyed, if the stop valve is not arranged on a path from a condensate outlet to the throat part of the Venturi tube, the condensate of the heat exchanger is pumped to be clean, then the gas phase inlet gas of the heat exchanger is continuously pumped, a part of process gas is blown away from the Venturi tube, the boosting energy of the Venturi tube for the part of gas is from the main inlet of the Venturi tube, and the energy of the main inlet gas is transferred to the Venturi tube by the volume pump, so the direct working part of the device is the volume pump, the gas phase of the process medium is pressurized from the volume pump, the working efficiency is higher than that of the part of gas pumped from the Venturi tube, and the liquid phase of condensable matter is pumped from the Venturi tube for the purpose of protecting the volume pump, although pumping is less efficient.
Preferably, the base radii of the first rotor and the second rotor are different. The base circles of the rotors are contacted at a certain angle when the claw tips and the claw bottoms are in meshing contact, and the radii of the base circles are different, so that the linear speeds of the rotors and the base circles at the contact positions are different, and a certain scraping effect is achieved on some adhered matters on the contact surfaces of the base circles.
As optimization, the air inlet hole is connected with the air inlet pipe through the clamping sleeve adapter, and the air outlet hole is also connected with the air outlet pipe through the clamping sleeve adapter. The cutting ferrule connects the convenience.
Compared with the prior art, the invention has the beneficial effects that: the heat exchangers are arranged among the plurality of compression stages used in series on the displacement pump and in front of the first-stage inlet, so that components which can be condensed in the compression are separated from the process gas firstly, the displacement pump only processes dry gas, the purpose of protecting the displacement pump is achieved, condensed substances in the heat exchangers are subsequently sucked into the Venturi tube and effectively mixed with high-pressure gas, and the components of the process medium conveyed by the device are completely unchanged; the multi-stage heat exchanger separates condensable substances at different pressure points, so that the refrigeration requirement is low; the graded heat exchangers also respectively take away the heat of each stage of compression of gas in the displacement pump, and the heat of compression is effectively controlled by matching with the adjustment of the air inlet disc in the displacement pump on the single-period air inlet amount, so that the efficient and stable operation of the machine is kept; the gas phase stop valve ensures that only condensate accumulated in the heat exchanger reaches the throat part of the Venturi tube, and gas phase advances from the path of the volumetric pump, so that the working efficiency of the whole device is increased; the three-jaw rotor has small pressure fluctuation degree of air outlet.
Drawings
In order that the present invention may be more readily and clearly understood, a more particular description of the invention briefly described above will be rendered by reference to specific embodiments that are illustrated in the appended drawings.
FIG. 1 is a process flow diagram of the present invention when used in series;
FIG. 2 is a schematic external view of the positive displacement pump of the present invention;
FIG. 3 is an exploded schematic view of a single stage compression stage of the present invention;
FIG. 4 is a front view of the pump cover, intake disc, and exhaust disc of the present invention;
FIG. 5 is a first schematic view of the first and second rotors of the present invention;
FIG. 6 is a first schematic drawing of the first and second rotors of the present invention;
FIG. 7 is a schematic structural view of a heat exchanger according to the present invention;
fig. 8 is a structural view of the gas phase shutoff valve of the present invention.
In the figure: 1-partition plate, 21-first rotor, 22-second rotor, 3-pump cover, 41-air inlet disk, 411-air inlet hole, 42-air outlet disk, 421-air outlet hole, 43-sealing ring, 44-mounting lug, 45-clamping sleeve adapter, 51-air inlet tube, 52-air outlet tube, 6-heat exchanger, 61-air inlet, 62-air outlet, 63-condensate outlet, 7-gas phase stop valve, 71-inlet, 72-outlet, 73-valve ball, 74-valve pad, 75-baffle net and 8-venturi tube.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1 and 7, the gas-liquid mixing and conveying device with the three-jaw rotor comprises a displacement pump, a heat exchanger 6 and a venturi tube 8, wherein the heat exchanger 6 comprises a gas inlet 61, a gas outlet 62 and a condensate outlet 63, the gas inlet 61 is a medium inlet, the gas outlet 62 is connected with an inlet of the displacement pump, an outlet of the displacement pump is connected with an inlet of the venturi tube 8, and the condensate outlet 63 is connected with a throat of the venturi tube 8.
The invention condenses the condensable matter in the process gas by a cooling method, leads the condensable matter to the throat part of the Venturi tube 8 through the condensate outlet 63, leads the dry gas to the displacement pump for compression and pressure boosting, leads the boosted gas to enter from the main air inlet of the Venturi tube 8, sucks the condensate liquid discharged by the heat exchanger 6 at the throat part, mixes the condensate liquid together and discharges the condensate liquid to a high-pressure area. The amplitude of the temperature reduction of the process medium by the heat exchanger 6 is related to the pressure increasing ratio of the displacement pump, as long as the liquid substance does not appear after the pressure of the cooled process medium is increased, the temperature reduction amplitude is achieved, according to different media processed by the device, the temperature reduction requirement is calculated by searching a gas-liquid balance curve chart of the medium, and then the proper cooling water temperature and flow are selected. The condensate condensed by the heat exchanger 6 is a part of the original process medium, and is mixed with the gas phase through the Venturi tube 8 at the tail end of the device to be output outwards, so that the purpose of not changing the process components is achieved, and the mixing of the inner throat part of the Venturi tube 8 is carried out under the high-speed flow, so that the mixing is very uniform.
As shown in fig. 2 and 3, the positive displacement pump includes a plurality of stages of compression stages, each stage of compression stage includes a partition plate 1, a first rotor 21, a second rotor 22, a pump cover 3, an air inlet pipe 51 and an air outlet pipe 52, the partition plate 1 and the pump cover 3 are fastened in series by fasteners, the first rotor 21 and the second rotor 22 which are meshed with each other are arranged in the pump cover 3, air inlet and outlet ports of each stage of compression stage are connected to the outside of the pump by the air inlet pipe 51 and the air outlet pipe 52, and each stage of compression stage constitutes a serial or parallel relationship; figure 1 is a flow chart of the series state,
when in series connection: the gas-liquid mixing conveying device is provided with heat exchangers 6 of which the number is the same as that of the series stages of the compression stages of the displacement pump, the heat exchanger 6 is arranged between a compression stage gas inlet pipe 51 of each stage and a front stage compression stage gas outlet pipe 52, and the gas outlet pipe 52 of the last stage compression stage is connected with the inlet of a Venturi tube 8;
when in parallel connection: the heat exchangers 6 are respectively arranged in front of the plurality of compression stages or share one heat exchanger 6, and the outlet gas of the plurality of compression stages is gathered and then connected with the inlet of the Venturi tube 8.
The compression stages formed by the partition board 1, the first rotor 21, the second rotor 22, the pump cover 3, the air inlet pipe 51 and the air outlet pipe 52 can be connected in series on one pump, as long as the strength of the main shaft is enough.
When the series connection is used, can reach multistage pressure boost purpose, moreover, all add the heat exchanger between stage and the stage, can effectively take away the produced heat of each level compression, prevent the gas of last one-level because the acting power of overheated influence next stage rotor part, moreover, heat exchanger 6 is hardly just can condense out with the whole condensation of the congealable matter in the medium at the first level, because pressure this moment is lower, need very low temperature just can condense out the condensate that just appeared when the last compression, so hierarchical cooling, not only effectively take away the heat of each level, but also condense out the condensate under the different pressure points respectively, reduce the performance demand of first grade heat exchanger 6.
The compression stages are connected in parallel, which can increase the gas handling capacity of the device.
As shown in fig. 3 to 6, the first rotor 41 and the second rotor 42 are claw-shaped rotors, the compression stage further includes an air inlet disc 41 and an air outlet disc 42, the air inlet disc 41 and the air outlet disc 42 are disposed on the end surface of the pump cover 3, the center of circle of the air inlet disc 41 is located on the axis of the first rotor 41, the center of circle of the air outlet disc 42 is located on the axis of the second rotor 42, the end surfaces of the air inlet disc 41 and the air outlet disc 42 departing from the rotors are respectively provided with mounting lugs 44 along the radial direction, the end surface of the pump cover 3 departing from the rotors is provided with mounting holes corresponding to the mounting lugs 44, the number of the mounting holes is more than that of the mounting lugs 44, and the cylindrical contact surfaces of the air inlet disc 41 and the; an air inlet hole 411 is formed in the disc surface of the air inlet disc 41, one end of the air inlet hole 411 faces the first rotor 41, the other end of the air inlet hole 411 is connected with the air inlet pipe 51, an air outlet hole 421 is formed in the disc surface of the air outlet disc 42, and one end of the air outlet hole 421 faces the second rotor 22 and the other end of the air outlet hole 421 is connected with the air outlet pipe 52.
The external connecting ports of the compression cavity where the rotor is located are an air inlet 411 and an air outlet 421 respectively, the air inlet and exhaust flow principle of the claw pump has been explained in detail in the prior art, the invention is not repeated, in the invention, the air inlet and exhaust port is arranged on a disc, especially the air inlet 411 is arranged on an air inlet disc 41 which can rotate around the axis of the first rotor 21, the air inlet disc 41 is fixed on the end surface of the pump cover 3 through an installation lug 44, the installation holes on the end surface of the pump cover 3 are multiple, the installation lug 44 can select the installation hole with a proper angle position as required to install, as shown in figures 5 and 6, the installation lug 44 is installed on different angles, the rotation angle of the air inlet disc 41 is set, the position of the air inlet 411 relative to the first rotor 21 can be changed, as shown in figures 5 and 6, the air inlet 411 causes different air intakes in one period at, when the tips of the first rotor 21 are just about to sweep over the chamber wall (indicated by arrows in fig. 6), if the first rotor 21 is just about to cover the air inlet holes 411, the air intake amount is the largest at one angle of the air inlet plate 41, and the air intake amount is smaller at another angle of the air inlet plate 41 in fig. 5. The single-period air suction quantity is changed from the heat dissipation consideration, although the heat exchanger 6 is arranged between the stages for carrying away heat when the compression stages of the device are used in series, the heat of compression in a single compression stage can only be dissipated through the pump body, the heat is related to the compression ratio and the gas quantity of single-stage compression, and the compression ratio is an amount which is inconvenient to change, because the heat is determined by the inlet and outlet pressure values of the device, the single-period air suction quantity in the device belongs to the process part served by the device, the priority of the parameters of the process part is the highest and cannot be changed, the single-period air suction quantity in the device can be controlled to change the heat quantity of the single stage, the smaller the air suction quantity is, the smaller the heat quantity is, the single-period air suction quantity is suitable for being used in the severe surrounding environment, such as unsmooth ventilation and the.
As shown in fig. 5 and 6, the first rotor 41 and the second rotor 42 are three-jaw rotors. Compared with a two-claw rotor, the three-claw rotor has better air inlet and outlet uniformity, the exhaust air volume and pressure fluctuation are small, and the fluctuation degree of condensate liquid is reduced in the Venturi tube 8 in the follow-up process of pumping and discharging. Of course, the four claws and the five claws have smaller exhaust fluctuation, but the number of the claws is increased, the air amount change range of the air inlet disc 41 is reduced, and therefore the number of the claws is three.
As shown in fig. 1 and 7, the heat exchanger 6 is a shell and tube heat exchanger, the heat exchanger 6 is vertically arranged, the process medium conveyed by the gas-liquid mixing and conveying device passes through the tube pass of the heat exchanger 6, the gas inlet 61 is arranged at the lower part, the gas outlet 62 is arranged at the upper part, and the condensate outlet 63 is positioned at the side of the gas inlet 61.
The tube type heat exchanger 6 is vertically arranged, the condensate outlet 63 is arranged at the lower part, liquid condensed in the gas rising process flows to the lower part, and therefore gas flowing out from the upper outlet is dry.
As shown in fig. 1 and 8, a gas phase stop valve 7 is arranged on a connecting pipeline from a condensate outlet 63 to a throat of a venturi tube 8, the gas phase stop valve 7 comprises a section of pipe body, a valve ball 73, a valve pad 74 and a blocking net 75, an inlet 71 and an outlet 72 of the gas phase stop valve 7 are respectively arranged at two ends of the pipe body, the caliber of the inlet 71 is larger than that of the outlet 72, an annular valve pad 74 is arranged on the inner surface of a pipe diameter change section of the pipe body, the blocking net 75 is arranged on the inlet 71 side in the pipe body, the valve ball 73 is arranged on the blocking net 75 and the valve pad 74, and the outer diameter of the valve; the outlet 72 is connected with the throat of the Venturi tube 8, the inlet 71 is connected with the condensate outlet 63, the outlet 72 faces downwards, and the inlet 71 faces upwards.
Liquid is from last down flowing into gaseous phase stop valve 7, and valve ball 73 is hollow, and density is less than liquid greatly, receives the buoyancy come-up, opens the flow channel down, thereby the lime set can pass through, and the lime set in heat exchanger 6 is sucked totally, and gaseous phase arrives valve ball 73 department down, and gaseous buoyancy holds up valve ball 73 inadequately, and valve ball 73 drops and contacts with valve gasket 74 to cut off the gaseous phase.
The gas phase stop valve 7 is provided to make the overall efficiency of the device higher, because the working efficiency of the claw pump is higher relative to the venturi tube 8 (equivalent to a jet pump) when gas is delivered, if no stop valve is provided on the path from the condensate outlet 63 to the throat of the venturi tube 8, the gas phase inlet gas of the heat exchanger 6 is continuously pumped after the condensate of the heat exchanger 6 is pumped completely, a part of the process gas is blown away from the venturi tube 8, the pressurizing energy of the venturi tube 8 to the part of the gas comes from the main inlet of the venturi tube 8, and the energy of the main inlet gas is transferred to the venturi tube by the positive displacement pump, so the direct working part of the device is the positive displacement pump, the gas phase of the process medium is pressurized from the positive displacement pump, the working efficiency is higher than that a part of the gas is pumped from the venturi tube 8, and the liquid phase of the condensable matter is pumped from the venturi tube 8 for the purpose of protecting the positive displacement pump, although pumping is less efficient.
As shown in fig. 5 and 6, the base radii of the first rotor 41 and the second rotor 42 are different. The base circles of the rotors are contacted at a certain angle when the claw tips and the claw bottoms are in meshing contact, and the radii of the base circles are different, so that the linear speeds of the rotors and the base circles at the contact positions are different, and a certain scraping effect is achieved on some adhered matters on the contact surfaces of the base circles.
As shown in fig. 3, the air inlet 411 is connected to the air inlet pipe 51 through the adapter 45, and the air outlet 421 is also connected to the air outlet pipe 52 through the adapter 45. The cutting ferrule connects the convenience.
The main working principle of the device is as follows: when the compression stages of the displacement pump are used in series: the process medium enters the device from the gas inlet 61 of the first-stage heat exchanger 6, the condensed dry gas enters the first-stage compression stage, the gas outlet pipe 52 of the first-stage compression stage is connected with the gas inlet 61 of the next-stage heat exchanger 6, so that the multi-stage series connection is carried out, the gas outlet pipe 52 of the last stage is connected to the Venturi tube 8, when the pressure gas passes through the Venturi tube 8, low pressure is generated at the throat part to suck the liquid phase of the process medium discharged from the condensate outlet 63 of each heat exchanger 6, and the liquid phase is mixed into the original components and then is conveyed to the. The use of displacement pumps in parallel with each compression stage increases the gas throughput of the plant.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Claims (2)
1. The utility model provides a gas-liquid mixture conveyor with three-jaw rotor which characterized in that: the gas-liquid mixing and conveying device comprises a displacement pump, a heat exchanger (6) and a Venturi tube (8), wherein the heat exchanger (6) comprises a gas inlet (61), a gas outlet (62) and a condensate outlet (63), the gas inlet (61) is a medium inlet, the gas outlet (62) is connected with an inlet of the displacement pump, an outlet of the displacement pump is connected with an inlet of the Venturi tube (8), and the condensate outlet (63) is connected with a throat pipe of the Venturi tube (8);
The positive displacement pump comprises a plurality of compression stages, each compression stage comprises a partition plate (1), a first rotor (21), a second rotor (22), a pump cover (3), an air inlet pipe (51) and an air outlet pipe (52), the partition plate (1) and the pump cover (3) are locked in series by using fasteners, the first rotor (21) and the second rotor (22) which are meshed with each other are arranged in the pump cover (3), air inlet and outlet ports of each compression stage are connected to the outside of the pump through the air inlet pipe (51) and the air outlet pipe (52), and each compression stage is connected in series or in parallel;
when in series connection: the gas-liquid mixing conveying device is provided with heat exchangers (6) which are connected with the compression stages of the displacement pump in series and have the same number of stages, the heat exchanger (6) is arranged between a gas inlet pipe (51) of each stage of compression stage and a gas outlet pipe (52) of a preceding stage of compression stage, and the gas outlet pipe (52) of a last stage of compression stage is connected with an inlet of a Venturi tube (8);
when in parallel connection: the heat exchangers (6) are respectively arranged in front of the plurality of compression stages or share one heat exchanger (6), and the outlet gas of the plurality of compression stages is collected and then connected with the inlet of a Venturi tube (8);
the first rotor (41) and the second rotor (42) are claw-shaped rotors, the compression stage further comprises an air inlet disc (41) and an air outlet disc (42), the air inlet disc (41) and the air outlet disc (42) are arranged on the end face of the pump cover (3), the circle center of the air inlet disc (41) is located on the axis of the first rotor (41), the circle center of the air outlet disc (42) is located on the axis of the second rotor (42), the end faces, departing from the rotors, of the air inlet disc (41) and the air outlet disc (42) are respectively provided with mounting lugs (44) along the radial direction, the end face, departing from the rotors, of the pump cover (3) is provided with mounting holes corresponding to the mounting lugs (44), the number of the mounting holes is more than that of the mounting lugs (44), and sealing rings (43) are arranged on cylindrical contact faces, respectively, of the air inlet disc (41) and the; an air inlet hole (411) is formed in the disc surface of the air inlet disc (41), one end of the air inlet hole (411) faces to the first rotor (41), the other end of the air inlet hole (411) is connected with an air inlet pipe (51), an air outlet hole (421) is formed in the disc surface of the air outlet disc (42), one end of the air outlet hole (421) faces to the second rotor (22), and the other end of the air outlet hole (421) is connected with an air outlet pipe (52);
The base radii of the first rotor (41) and the second rotor (42) are different; air inlet pipe (51) is connected through cutting ferrule adapter (45) in inlet port (411), outlet port (421) also connect outlet duct (52) through cutting ferrule adapter (45).
2. A gas-liquid mixing and conveying apparatus with a three-jaw rotor according to claim 1, characterized in that: the first rotor (41) and the second rotor (42) are three-jaw rotors.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010541636.2A CN111852860A (en) | 2019-09-03 | 2019-09-03 | Gas-liquid mixing and conveying device with three-jaw rotor |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910826154.9A CN110566457B (en) | 2019-09-03 | 2019-09-03 | Gas-liquid mixing and conveying device with three-jaw rotor |
| CN202010541636.2A CN111852860A (en) | 2019-09-03 | 2019-09-03 | Gas-liquid mixing and conveying device with three-jaw rotor |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910826154.9A Division CN110566457B (en) | 2019-09-03 | 2019-09-03 | Gas-liquid mixing and conveying device with three-jaw rotor |
Publications (1)
| Publication Number | Publication Date |
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| CN111852860A true CN111852860A (en) | 2020-10-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910826154.9A Active CN110566457B (en) | 2019-09-03 | 2019-09-03 | Gas-liquid mixing and conveying device with three-jaw rotor |
| CN202010541314.8A Withdrawn CN111852859A (en) | 2019-09-03 | 2019-09-03 | Gas-liquid mixing and conveying device with three-jaw rotor |
| CN202010541636.2A Withdrawn CN111852860A (en) | 2019-09-03 | 2019-09-03 | Gas-liquid mixing and conveying device with three-jaw rotor |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910826154.9A Active CN110566457B (en) | 2019-09-03 | 2019-09-03 | Gas-liquid mixing and conveying device with three-jaw rotor |
| CN202010541314.8A Withdrawn CN111852859A (en) | 2019-09-03 | 2019-09-03 | Gas-liquid mixing and conveying device with three-jaw rotor |
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| CN (3) | CN110566457B (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115596665B (en) * | 2022-12-09 | 2023-03-14 | 中核第七研究设计院有限公司 | Exhaust structure of claw-shaped dry-type gas transmission pump |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003326196A (en) * | 2002-05-13 | 2003-11-18 | Denso Corp | Ejector |
| JP2005037093A (en) * | 2003-07-18 | 2005-02-10 | Tgk Co Ltd | Refrigerating cycle |
| TWI479078B (en) * | 2007-11-14 | 2015-04-01 | Ulvac Inc | Multistage dry pump |
| US20110016895A1 (en) * | 2008-05-21 | 2011-01-27 | Carrier Corporation | Methods and Systems for Injecting Liquid Into a Screw Compressor for Noise Suppression |
| CN204477400U (en) * | 2015-01-29 | 2015-07-15 | 天津大学 | A kind of one-way valve |
| CN108343605B (en) * | 2018-05-10 | 2023-08-18 | 中国石油大学(华东) | Three-jaw type vacuum pump |
-
2019
- 2019-09-03 CN CN201910826154.9A patent/CN110566457B/en active Active
- 2019-09-03 CN CN202010541314.8A patent/CN111852859A/en not_active Withdrawn
- 2019-09-03 CN CN202010541636.2A patent/CN111852860A/en not_active Withdrawn
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| Publication number | Publication date |
|---|---|
| CN110566457B (en) | 2020-07-10 |
| CN110566457A (en) | 2019-12-13 |
| CN111852859A (en) | 2020-10-30 |
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Application publication date: 20201030 |