CN110762003B - Drying device for treating compressed air by utilizing waste heat of screw air compressor - Google Patents
Drying device for treating compressed air by utilizing waste heat of screw air compressor Download PDFInfo
- Publication number
- CN110762003B CN110762003B CN201911015570.7A CN201911015570A CN110762003B CN 110762003 B CN110762003 B CN 110762003B CN 201911015570 A CN201911015570 A CN 201911015570A CN 110762003 B CN110762003 B CN 110762003B
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- heat exchange
- compressed air
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- 239000002918 waste heat Substances 0.000 title claims abstract description 35
- 238000001035 drying Methods 0.000 title claims abstract description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 146
- 239000006096 absorbing agent Substances 0.000 claims abstract description 43
- 239000000498 cooling water Substances 0.000 claims abstract description 30
- 238000007605 air drying Methods 0.000 claims abstract description 18
- 239000002699 waste material Substances 0.000 claims abstract description 6
- 239000007921 spray Substances 0.000 claims description 32
- 239000007789 gas Substances 0.000 claims description 21
- 238000010438 heat treatment Methods 0.000 claims description 10
- 238000003860 storage Methods 0.000 claims description 8
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 238000011084 recovery Methods 0.000 claims description 3
- 239000003507 refrigerant Substances 0.000 abstract description 23
- 238000005057 refrigeration Methods 0.000 abstract description 13
- 238000001816 cooling Methods 0.000 abstract description 7
- 239000003921 oil Substances 0.000 description 15
- 239000010687 lubricating oil Substances 0.000 description 11
- 230000009471 action Effects 0.000 description 8
- 238000000034 method Methods 0.000 description 7
- 230000008569 process Effects 0.000 description 7
- AMXOYNBUYSYVKV-UHFFFAOYSA-M lithium bromide Chemical compound [Li+].[Br-] AMXOYNBUYSYVKV-UHFFFAOYSA-M 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 6
- 241000190070 Sarracenia purpurea Species 0.000 description 5
- 239000007788 liquid Substances 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- UQMRAFJOBWOFNS-UHFFFAOYSA-N butyl 2-(2,4-dichlorophenoxy)acetate Chemical compound CCCCOC(=O)COC1=CC=C(Cl)C=C1Cl UQMRAFJOBWOFNS-UHFFFAOYSA-N 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000009833 condensation Methods 0.000 description 2
- 230000005494 condensation Effects 0.000 description 2
- 239000002826 coolant Substances 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000005461 lubrication Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 239000002250 absorbent Substances 0.000 description 1
- 230000002745 absorbent Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000002440 industrial waste Substances 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000009834 vaporization Methods 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
Classifications
-
- 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
- F04C18/16—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 helical teeth, e.g. chevron-shaped, screw type
-
- 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
- F04C29/0092—Removing solid or liquid contaminants from the gas under pumping, e.g. by filtering or deposition; Purging; Scrubbing; Cleaning
-
- 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
- F04C29/02—Lubrication; Lubricant separation
- F04C29/026—Lubricant separation
-
- 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
-
- 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
- F04C29/042—Heating; Cooling; Heat insulation by injecting a fluid
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The invention discloses a drying device for treating compressed air by utilizing waste heat of a screw air compressor, and belongs to the technical field of waste heat utilization of screw air compressors and compressed air drying. The device comprises a screw air compressor and a refrigeration cycle composed of an intercommunicated generator, a condenser and an intercommunicated evaporator and absorber, wherein an inner water pipe is connected with a pipe bundle pipe of the generator, the screw air compressor is respectively connected with an outer air pipe and an outer oil pipe, the outer air pipe is sequentially led to a compressed air precooler and a compressed air drying treatment heat exchanger, the inner water pipe and the pipe bundle pipe of the generator form waste hot water circulation, the pipe bundle pipe of the condenser and the absorber form cooling water circulation, the pipe bundle pipe of the compressed air drying treatment heat exchanger and the evaporator form chilled water circulation, the generator and the absorber form solution circulation, and the device utilizes working waste heat of the screw machine as a refrigeration heat source of the refrigeration cycle, so that the refrigeration cycle water is cooled by low-temperature refrigerant, and the purpose of indirectly cooling the compressed air drying is achieved.
Description
[ Field of technology ]
The invention relates to a drying device for treating compressed air by utilizing waste heat of a screw air compressor, and belongs to the technical field of waste heat utilization of the screw air compressor and compressed air drying treatment.
[ Background Art ]
The motor manufacturing industry commonly adopts a screw air compressor as an air source power device, and the provided air source power is supplied to a large number of motor tooling equipment and automatic manufacturing equipment. On the one hand, in the operation process of the screw air compressor, heat energy is generated by air compression and lubricating oil in an oil way has sealing movement heat during air compression, however, the existing motor manufacturing enterprises can discharge the lubricating oil as industrial waste heat in an ineffective way, and the oil temperature as high as about 90 ℃ is not well utilized; on the other hand, the use of a moisture-containing air source has a great influence on motor tooling equipment and automatic manufacturing equipment, and a high-precision transmission system of the equipment is easy to rust.
In view of this, how to effectively utilize the operation waste heat of the screw air compressor to provide dry compressed air for motor manufacturing production is a direction of urgent need in the motor industry.
The generators, condensers, evaporators and absorbers of the refrigeration cycle of the prior art generally adopt coil pipes for heat exchange, and the coil pipes have the defect of smaller heat exchange area.
[ Invention ]
The present invention addresses the above-described shortcomings of the prior art by providing a drying apparatus for treating compressed air with waste heat from a screw air compressor.
In order to solve the technical problems, the invention provides the following solutions:
The utility model provides an utilize drying device of screw air compressor machine waste heat treatment compressed air, includes generator, condenser, evaporimeter, absorber and interconnect's screw air compressor machine, oil and gas separator, and generator, condenser, evaporimeter, absorber have generator shell pipe, condenser shell pipe, evaporimeter shell pipe and absorber shell pipe respectively, and its improvement point lies in: the compressed air drying treatment heat exchanger comprises a heat exchanger shell tube, a fifth fin type heat exchange tube bundle tube positioned in the heat exchanger shell tube, and air baffle plates which are staggered and inserted on the fifth fin type heat exchange tube bundle tube at intervals, wherein the main cavity is communicated with the heat exchanger shell tube through a first bridge interface, the heat exchanger shell tube is sequentially communicated with a second bridge interface, the first auxiliary cavity, the heat exchange tube and the second auxiliary cavity, the second auxiliary cavity is externally connected with gas utilization equipment, the sleeve type heat exchanger consists of an outer air pipe, an outer oil pipe and a heat exchange inner water pipe sequentially penetrating through the outer air pipe and the outer oil pipe, the exhaust end of the oil-gas separator is connected with the inlet of the main cavity through the outer air pipe, the oil discharge end of the oil-gas separator is fed back to the screw air compressor through the outer oil pipe, a generator spray header and a first fin type heat exchange tube bundle pipe are respectively arranged in the generator shell pipe up and down, a second fin type heat exchange tube bundle pipe is arranged in the condenser shell pipe, an evaporator spray header and a third fin type heat exchange tube bundle pipe are respectively arranged in the evaporator shell pipe up and down, an absorber spray header and a fourth fin type heat exchange tube bundle pipe are respectively arranged in the absorber shell pipe up and down, the upper space of the generator shell pipe is communicated with the upper space of the condenser shell pipe, the upper space of the evaporator shell pipe is communicated with the upper space of the absorber shell pipe, the two ends of the solution pipeline I are respectively connected with a solution cup a arranged at the bottom of the generator shell and a solution cup b arranged at the bottom of the absorber shell, the bottom opening of the solution cup b is communicated with the absorber spray header through a solution pump, the two ends of the solution pipeline II are respectively connected with the bottom opening of the solution cup b and the generator spray header, the solution pipeline II is provided with another solution pump, the bottom of the condenser shell is communicated to the upper part of the evaporator shell through a U-shaped throttling spray pipe, the water cup arranged at the bottom of the evaporator shell is communicated to the evaporator spray header through an evaporator circulating water pump, the fourth fin type heat exchange tube bundle tube and the second fin type heat exchange tube bundle tube form a cooling water circulation pipeline, the heat exchange inner water tube and the first fin type heat exchange tube bundle tube form a waste heat supply circulation pipeline, and the third fin type heat exchange tube bundle tube and the fifth fin type heat exchange tube bundle tube form a chilled water circulation pipeline.
The waste heat water heating circulation pipeline is connected with a water storage device for waste heat recovery and a waste heat water circulation pump.
A water vapor passage a is connected between the upper space of the generator shell tube and the upper space of the condenser shell tube.
The cooling water circulating pipeline is connected with a cooling water tower and a cooling water circulating pump.
The frozen water circulating pipeline is connected with a frozen water accumulator and a frozen water circulating pump.
A water vapor passage b is connected between the upper space of the evaporator shell and the upper space of the absorber shell.
The solution pipeline I and the solution pipeline II pass through a sealed shell and form the solution heat exchanger.
The condenser shell tube is externally connected with a vacuumizing device.
The heat exchanger shell and tube is provided with a water storage cup with a drainer at the bottom wall.
The vacuum pumping device is arranged to prevent outside air from leaking into the refrigeration cycle system, ensure that the interior of the refrigeration cycle system is in a good vacuum state, and simultaneously pump out non-condensable gas in the refrigeration cycle system.
The invention has the following advantages and beneficial effects:
The device comprises a generator, a solution heat exchanger, a condenser, a U-shaped joint spray pipe, an evaporator, an absorber, a cooling water circulation pipeline and the like to form refrigeration circulation, wherein the refrigeration circulation fully absorbs working waste heat of compressed air and lubricating oil carried by a screw air compressor to be used as a heat source for refrigeration, the sleeve-type heat exchanger continuously transmits heat to the generator for heating solution in a shell pipe of the generator, proper low-temperature refrigerant water is continuously prepared in the refrigeration circulation process by utilizing the change of the concentration of the solution, the low-temperature refrigerant water is continuously vaporized under the refrigeration circulation low-pressure condition to be used for cooling the chilled water, the cooled chilled water is continuously output to a compressed air drying processor to flow through a fifth fin type heat exchange tube bundle pipe, and the compressed air flowing through the compressed air drying processor is cooled by the chilled water at low temperature to promote the compressed air to be dried.
The device has extremely low electric energy consumption, only needs to provide a very small amount of electric quantity for the fan, the two solution pumps and the four water pumps of the cooling water tower, not only avoids the heat emission of the screw air compressor to the external environment, but also returns lubricating oil supplied to the screw air compressor after heat exchange of the sleeve heat exchanger to be low-temperature lubricating oil, avoids the excessively rapid viscosity reduction of the lubricating oil due to high temperature, and ensures the continuous sealing lubrication of the screw air compressor.
Compared with the coil pipes in the prior art, the first fin type heat exchange tube bundle pipe arranged in the generator shell pipe has larger heat exchange area, and only a small amount of heat supply is needed to evaporate water in the solution; compared with the coil pipes in the prior art, the second fin type heat exchange tube bundle pipe arranged in the condenser shell pipe has a larger heat exchange area, and can be beneficial to accelerating the condensation of water vapor; compared with the coil pipes in the prior art, the third fin type heat exchange tube bundle pipe arranged in the evaporator shell pipe has larger heat exchange area, and can accelerate the vaporization of the refrigerant water; the fourth fin type heat exchange tube bundle tube arranged in the absorption shell tube has larger heat exchange area compared with the coil tube in the prior art, and accelerates solution cooling.
[ Description of the drawings ]
Fig. 1 is a schematic structural view of the present invention.
[ Detailed description ] of the invention
Referring to fig. 1, a drying device for treating compressed air by utilizing waste heat of a screw air compressor includes a generator, a condenser, an evaporator, an absorber, and a screw air compressor 11 and an oil-gas separator 12 which are connected with each other, wherein the generator, the condenser, the evaporator, and the absorber are respectively provided with a generator shell tube 5, a condenser shell tube 6, an evaporator shell tube 7, and an absorber shell tube 8, and the improvement points thereof are as follows: the device also comprises a compressed air drying processor and a sleeve type heat exchanger 2, wherein the compressed air drying processor consists of a compressed air precooler 3 and a compressed air drying treatment heat exchanger 4, the compressed air precooler 3 comprises a precooler shell tube and a heat exchange tube 31, the precooler shell tube is divided into a main cavity 30, a first auxiliary cavity 30a and a second auxiliary cavity 30b, the main cavity 30 is provided with an inlet h1, the heat exchange tubes 31 which are arranged at intervals extend along the length direction of the main cavity 30, two ends of each heat exchange tube 31 are respectively communicated with the first auxiliary cavity 30a and the second auxiliary cavity 30b, the compressed air drying treatment heat exchanger 4 comprises a heat exchanger shell tube 40, a fifth fin type heat exchange tube bundle tube 41 positioned in the heat exchanger shell tube 40 and a gas baffle plate 42 which is misplaced and inserted on the fifth fin type heat exchange tube bundle tube 41 at intervals, the main cavity 30 is communicated with the heat exchanger shell tube 40 through a first bridge interface 40a, the heat exchanger shell tube 40 is sequentially communicated with a second bridge interface 40b, a first auxiliary cavity 30a, a heat exchange tube 31 and a second auxiliary cavity 30b, the second auxiliary cavity 30b is externally connected with gas utilization equipment through an outlet h2 of the second auxiliary cavity, the sleeve type heat exchanger 2 consists of an outer gas tube 21, an outer oil tube 22 and a heat exchange inner water tube 23 sequentially penetrating through the outer gas tube 21 and the outer oil tube 22, an exhaust end 121 of the oil-gas separator 12 is connected with an inlet h1 of the main cavity 30 through the outer gas tube 21, an oil discharge end 122 of the oil-gas separator 12 is connected with the other end of the screw air compressor 11 through the outer oil tube 22, a generator spray header 51 is vertically arranged in the generator shell tube 5, a gas discharge end, The first fin type heat exchange tube bundle tube 50 is provided with a second fin type heat exchange tube bundle tube 60 in the condenser shell tube 6, the evaporator shell tube 7 is internally and vertically provided with an evaporator spray header 71 and a third fin type heat exchange tube bundle tube 70, the absorber shell tube 8 is internally and vertically provided with an absorber spray header 81 and a fourth fin type heat exchange tube bundle tube 80, the upper space of the generator shell tube 5 is communicated with the upper space of the condenser shell tube 6, the upper space of the evaporator shell tube 7 is communicated with the upper space of the absorber shell tube 8, a solution pipeline I91 and a solution pipeline II 92 are arranged between the generator shell tube 5 and the absorber shell tube 8, two ends of the solution pipeline I91 are respectively connected with a solution cup a 52 arranged at the bottom of the generator shell tube 5 and a solution cup b 82 arranged at the bottom of the absorber shell tube 8, the bottom opening of the solution cup b 82 is communicated with the absorber spray header 81 through a solution pump P1, two ends of a solution pipeline II 92 are respectively connected with the bottom opening of the solution cup b 82 and the generator spray header 51, another solution pump P2 is arranged on the solution pipeline II 92, the bottom of the condenser shell tube 6 is communicated with the upper part of the evaporator shell tube 7 through a U-shaped throttling spray tube 73, the water cup 72 arranged at the bottom of the evaporator shell tube 7 is communicated with the evaporator spray header 71 through an evaporator circulating water pump b3, the fourth fin type heat exchange tube bundle tube 80 and the second fin type heat exchange tube bundle tube 60 form a cooling water circulation pipeline, the heat exchange inner water pipe 23 and the first fin type heat exchange tube bundle tube 50 form a waste hot water heat supply circulation pipeline, the third fin type heat exchange tube bundle tube 70 and the fifth fin type heat exchange tube bundle tube 41 form a chilled water circulation line.
The lithium bromide solution (hereinafter referred to as solution) used in the invention adopts a binary working substance pair mixture composed of refrigerant water and absorbent lithium bromide. Wherein, the boiling point of water is low under the condition of low pressure, and lithium bromide is very easy to absorb and refrigerate.
The hot water heating circulation pipeline is connected with a water storage device T1 for waste heat recovery and a waste hot water circulation pump b1.
The water flows out from the water reservoir T1, flows through the heat exchange inner water pipe 23, the waste hot water circulating pump b1 and the first fin type heat exchange tube bundle pipe 50, and then flows back to the water reservoir T1 to form a waste hot water heat supply circulating pipeline, and the circulating pipeline sequentially absorbs the waste heat of the high-temperature compressed air flowing in the outer air pipe 21 and the waste heat of the high-temperature oil flowing in the outer oil pipe 22 when the water flows through the whole heat exchange inner water pipe 23, and is used for heating the dilute solution sprayed on the heat exchange tube bundle pipe 50 when the heat-carrying water flows into the first fin type heat exchange tube bundle pipe 50.
A water vapor passage a 5-6 is connected between the upper space of the generator shell tube 5 and the upper space of the condenser shell tube 6.
When the dilute solution is sprayed onto the first fin type heat exchange tube bundle tubes 50, the water of the dilute solution is evaporated into water vapor which flows from the upper space of the generator shell tube 5 into the upper space of the condenser shell tube 6 due to the heating of the dilute solution by the hot water flowing in the tubes.
The cooling water circulating pipeline is connected with a cooling water tower T2 and a cooling water circulating pump b2.
The cooling water flows out of the cooling water tower T2, is supplied to the fourth fin-type heat exchange tube bundle tube 80 by the cooling water circulation pump b2, flows into the second fin-type heat exchange tube bundle tube 60, and then flows back to the cooling water tower T2, thereby forming a cooling water circulation line. However, the cooling water flowing in the second fin-type heat exchange tube bundle tubes 60 condenses the water vapor inside the condenser shell tube 6 into refrigerant water, which flows out of the condenser shell tube 6.
The refrigerant water flows through the U-shaped throttling spray pipe 73, the refrigerant water drops flowing into the evaporator shell 7 are sprayed onto the third fin type heat exchange tube bundle pipe 70 under the action of the pressure difference formed at the two ends of the pipe, and flow downwards to be collected into the water cup 72 positioned at the bottom of the evaporator shell 7, and the evaporator circulating water pump b3 continuously conveys the refrigerant water in the water cup 72 to the evaporator spray header 71 and sprays the refrigerant water onto the third fin type heat exchange tube bundle pipe 70, so that the refrigerant water absorbs the heat of the chilled water flowing into the third fin type heat exchange tube bundle pipe 70.
The frozen water circulating pipeline is connected with a frozen water accumulator T3 and a frozen water circulating pump b4.
Chilled water flows out of the chilled water reservoir T3, flows through the chilled water circulation pump, the third fin-type heat exchange tube bundle tubes 70 and the fifth fin-type heat exchange tube bundle tubes 41 in sequence, and then flows back to the chilled water reservoir T3 to form a chilled water circulation pipeline.
A water vapor passage b 7-8 is connected between the upper space of the evaporator shell tube 7 and the upper space of the absorber shell tube 8.
When the coolant water falls onto the third fin type heat exchange tube bundle tubes 70, in which the chilled water flows, the coolant water is vaporized into water vapor by absorbing the heat of the chilled water, and the water vapor flows into the upper space of the absorber casing 8 from the upper space of the evaporation casing 7.
The solution pipe I91 and the solution pipe II 92 are provided through one seal housing 90, and the solution pipe I91, the solution pipe II 92 and the seal housing 90 constitute the solution heat exchanger 9.
The concentration and the temperature of the solution flowing in the solution pipe I91 are different from those of the solution flowing in the solution pipe II 92, and the flowing directions of the solutions are opposite. In detail, the solution heated by the generator shell tube 5 becomes a concentrated solution with higher temperature due to evaporation of moisture, the concentrated solution flows automatically into the solution cup b 82 positioned at the bottom of the absorber shell tube 8, the concentrated solution in the solution cup b 82 is conveyed to the absorber spray header 81 by means of the solution pump P1 and then sprayed on the fourth fin type heat exchange tube bundle tube 80, the water vapor filled in the absorber shell tube 8 is absorbed in the spraying process, the concentrated solution is diluted into a diluted solution and flows back into the solution cup b 82 again, and the diluted solution flows into the solution pipeline II 92 by the other solution pump P2 and is sprayed on the first fin type heat exchange tube bundle tube 50 by the generator spray header 51, and the circulation is performed.
The high-temperature concentrated solution flowing in the pipe I91 and the low-temperature diluted solution flowing in the pipe II 92 in the sealed housing 90 exchange heat with each other in the sealed housing 90.
The condenser shell 6 is externally connected with a vacuum pumping device 61.
The generator shell tube 5, the condenser shell tube 6, the evaporator shell tube 7 and the absorber shell tube 8 used in the invention ensure that all shell tubes are in a vacuum state through the vacuumizing device 61.
The compressed air containing moisture after heat exchange and cooling in the double pipe heat exchanger 2 flows into the main cavity 30 through the inlet h1 and flows into the heat exchanger shell tube 40 by bypassing the gaps between the heat exchange tubes 31, at the same time, the chilled water flowing in the third fin type heat exchange tube bundle tube 70 completes heat exchange with the refrigerant water (located in the evaporator shell tube 7), and the chilled water is cooled and flows into the fifth fin type heat exchange tube bundle tube 41, so that the compressed air containing moisture flowing out of the fifth fin type heat exchange tube bundle tube 41 and located in the heat exchanger shell tube 40 is indirectly cooled, after the cooling reaches a certain dew point temperature, the moisture contained in the compressed air is separated out, the dried compressed air is obtained, flows out through the second bridge interface 40b and flows through the first auxiliary cavity 30a, the heat exchange tube 31 and the second auxiliary cavity 30b in sequence, and the compressed air power without moisture is provided for air using equipment.
The heat exchanger shell 40 is provided with a water storage cup 43 with a drain at its bottom wall.
The working process of the invention is as follows: after the high-temperature high-pressure oil-gas mixture flowing out of one end of the screw air compressor 11 is treated by the oil-gas separator 12, compressed air flows into the outer air pipe 21 through the exhaust end 121, lubricating oil flows into the outer oil pipe 22 through the oil discharge end 122, meanwhile, circulating water for absorbing waste heat flows into the heat exchange inner water pipe 23, and the water, the high-temperature compressed air and the high-temperature lubricating oil respectively flow in opposite directions to perform reverse heat exchange in the sleeve heat exchanger 2, and the heat exchange result is that: after the water absorbs the waste heat of the high-temperature compressed air and the high-temperature lubricating oil to be heated, the waste heat flows through the first fin type heat exchange tube bundle tube 50 under the action of the waste heat water circulating pump b1, and flows back to the water receiver T1 after being cooled, wherein the high-temperature hot water flowing through the first fin type heat exchange tube bundle tube 50 is used for continuously heating the solution sprayed on the surface of the tube 50; at the same time, the compressed air and the lubricating oil are respectively cooled, the cooled compressed air flows into the main cavity 30 of the compressed air precooler 3, and the cooled lubricating oil flows back into the screw air compressor 11 from the other end of the screw air compressor 11, so that the low-temperature lubrication requirement of the screw air compressor 11 is met.
The solution is from a solution cup b 82 which is stored at the bottom of the absorber shell tube 8, is supplied to the generator spray header 51 through a solution pipeline II 92 under the pressurizing action of another solution pump P2, is continuously sprayed to the first fin type heat exchange tube bundle tube 50 by the solution, and is subjected to hot water heat exchange with the tube 50 in the process of spraying the solution, so that the water vapor which is evaporated by heating the solution enters the condenser shell tube 6 through a water vapor channel 5-6 (however, the concentrated solution is stored in the solution cup a 52 and flows back to the solution cup b 82 through a solution pipeline I91).
The water vapor enters the condenser shell tube 6 and exchanges heat with the second fin type heat exchange tube bundle tube 60, the cooling water from the cooling water tower T2 continuously flows in the tube 60 (under the pressurizing action of the cooling water circulating pump b2, the cooling water flowing out of the cooling water tower T2 flows through the fourth fin type heat exchange tube bundle tube 80 and flows back to the cooling water tower T2 after passing through the second fin type heat exchange tube bundle tube 60), the water vapor exchanges heat with the cooling water in the second fin type heat exchange tube bundle tube 60 and is condensed into the refrigerant water, the refrigerant water flowing out of the condenser shell tube 6 is depressurized and throttled by the U-shaped throttle spray tube 73 and then is sprayed onto the third fin type heat exchange tube bundle tube 70 in the evaporator shell tube 7 at a low level Wen Di so as to absorb the heat of the freezing water in the tube 70, and the evaporator circulating water pump b3 pressurizes the refrigerant water stored in the water cup 72 at the bottom of the evaporator shell tube 7 through the evaporator spray head 71 on the third fin type heat exchange tube bundle tube 70. However, the chilled water from the chilled water reservoir T3 flows continuously in the third finned heat exchanger tube bundle tubes 70, and the chilled water also flows in the fifth finned heat exchanger tube bundle tubes 41, and the chilled water exchanges heat with the compressed air flowing in the heat exchanger shell tubes 40 (the chilled water flowing out of the chilled water reservoir T3 flows through the third finned heat exchanger tube bundle tubes 70 and the fifth finned heat exchanger tube bundle tubes 41 by the chilled water circulation pump b4 under a supercharging effect, and then flows back to the chilled water reservoir T3). When the refrigerant water sprayed on the third fin type heat exchange tube bundle tubes 70 absorbs the heat of the chilled water in the tubes 70, the refrigerant water is vaporized into refrigerant vapor, and the refrigerant vapor enters the absorber shell tube 8 through the water vapor channels 7-8.
Because the absorber shell tube 8 sprays the solution of the solution cup b 82 through the absorber spray header 81 continuously through the solution pump P1, the refrigerant vapor is mixed with the sprayed concentrated solution, so that the concentrated solution is dissolved and absorbed by the concentrated solution, when the concentrated solution becomes a dilute solution, a large amount of heat is generated due to the absorption of the refrigerant vapor, the heated solution is sprayed and drops on the fourth fin type heat exchange tube bundle tube 80, cooling water flows in the fourth fin type heat exchange tube bundle tube 80, and the circulating cooling water absorbs the heat of the solution outside the fourth fin type heat exchange tube bundle tube 80 and then enters the second fin type heat exchange tube bundle tube 60 to absorb the heat of the water vapor entering the condenser shell tube 6 from the generator shell tube 5 again, so that the water vapor is condensed into the refrigerant water again, and the circulating is continuously repeated.
The compressed air cooled by the sleeve heat exchanger 2 flows into the main cavity 30 of the compressed air precooler 3 from the air outlet pipe 211 of the outer air pipe 21 through the inlet h1, the flow path of the compressed air flows along the main cavity 30 and then flows into the heat exchange shell 40 of the compressed air drying heat exchanger 4 through the first bridge port 40a, then flows into the first auxiliary cavity 30a through the second bridge port 40b, then flows into the heat exchange pipe 31 and then flows into the second auxiliary cavity 30b, and finally, the dry compressed air is conveyed to the external air supply through the outlet h2 of the second auxiliary cavity 30 b. Wherein,
Because the chilled water is chilled water which absorbs the water cooling capacity of the refrigerant when in the third fin type heat exchange tube bundle tube 70, the low-temperature chilled water flowing out of the third fin type heat exchange tube bundle tube 70 enters the fifth fin type heat exchange tube bundle tube 41, and the low-temperature chilled water generates heat exchange with the compressed air flowing in the heat exchange tube shell tube 40 in the flowing process, and the compressed air flows slowly under the condition of being blocked by the air blocking piece 42 for a plurality of times, so that the compressed air fully contacts with the fins of the fifth fin type heat exchange tube bundle tube 41, the heat of the compressed air is taken away by the chilled water, the compressed air is rapidly cooled, the moisture contained in the wet compressed air reaches the saturation temperature and is rapidly condensed, and the moisture in the compressed air is condensed to form water drops, thereby realizing the drying treatment of the compressed air. Most of the water vapor is condensed into liquid water by contacting with the fins, the liquid water flowing downwards is collected into the water storage cup 43 with the drainer (not shown), when the water storage cup 43 does not reach a certain water level, the pressure of the compressed air filled in the heat exchanger shell tube 40 closes the drainer, no air flow leakage is caused, when the water level rises to a certain height, the water storage cup 43 with the drainer is automatically opened under the action of water buoyancy, the liquid water is quickly discharged under the action of air pressure, the drainer after water drainage loses the action of water buoyancy, and the drainer is automatically closed under the action of self gravity and air pressure.
When the compressed air subjected to the drying and cooling treatment flows into the heat exchange tube 31, the compressed air and the high-temperature water-containing compressed air which flows into the main cavity 30 later but is untreated are subjected to heat exchange in the compressed air precooler 3, and the heat exchange results in that on one hand, the cold energy carried by the dry cold-state compressed air is recovered, and the compressed air carrying a large amount of water vapor and having a higher temperature is cooled by the cold energy, so that the heat load of the compressed air drying treatment heat exchanger 4 is reduced, and the energy saving purpose is achieved; on the other hand, the temperature of the low-temperature dry compressed air in the compressed air precooler 3 is raised, so that the dry compressed air is prevented from rusting caused by condensation on the outer wall of the air conveying pipeline because the temperature is lower than the external environment temperature in the air supply and conveying process of air supply equipment.
Claims (9)
1. The utility model provides an utilize drying device of screw air compressor machine waste heat treatment compressed air, includes generator, condenser, evaporimeter, absorber and interconnect's screw air compressor machine, oil and gas separator, and generator, condenser, evaporimeter, absorber have generator shell pipe, condenser shell pipe, evaporimeter shell pipe and absorber shell pipe, its characterized in that respectively: also included are a compressed air drying processor and a sleeve heat exchanger,
The compressed air drying processor consists of a compressed air precooler and a compressed air drying heat exchanger, the compressed air precooler comprises a precooler shell pipe and heat exchange tubes, the precooler shell pipe is divided into a main cavity, a first auxiliary cavity and a second auxiliary cavity, the main cavity is provided with an inlet, the heat exchange tubes which are arranged at intervals extend along the length direction of the main cavity, two ends of each heat exchange tube are respectively communicated with the first auxiliary cavity and the second auxiliary cavity, the compressed air drying heat exchanger comprises a heat exchange shell pipe, a fifth fin type heat exchange tube bundle pipe positioned in the heat exchange shell pipe and a gas baffle which is misplaced and inserted on the fifth fin type heat exchange tube bundle pipe at intervals, the main cavity is communicated with the heat exchange shell pipe through a first bridge interface, the heat exchange tubes and the second auxiliary cavity are sequentially communicated with a second bridge interface, the first auxiliary cavity, the heat exchange tubes and the second auxiliary cavity are connected with gas utilization equipment,
The sleeve type heat exchanger consists of an outer air pipe, an outer oil pipe and a heat exchange inner water pipe sequentially penetrating the outer air pipe and the outer oil pipe, the exhaust end of the oil-gas separator is connected with the inlet of the main cavity body through the outer air pipe, the oil discharge end of the oil-gas separator is fed back to the screw air compressor through the outer oil pipe,
The generator shell tube is internally and vertically provided with a generator spray header and a first fin type heat exchange tube bundle tube, the condenser shell tube is internally provided with a second fin type heat exchange tube bundle tube, the evaporator shell tube is internally and vertically provided with an evaporator spray header and a third fin type heat exchange tube bundle tube, the absorber shell tube is internally and vertically provided with an absorber spray header and a fourth fin type heat exchange tube bundle tube, the upper space of the generator shell tube is communicated with the upper space of the condenser shell tube, the upper space of the evaporator shell tube is communicated with the upper space of the absorber shell tube, a solution pipeline I and a solution pipeline II are arranged between the generator shell tube and the absorber shell tube, the two ends of the solution pipeline I are respectively connected with a solution cup a arranged at the bottom of the generator shell tube and a solution cup b arranged at the bottom of the absorber shell tube, the bottom opening of the solution cup b is communicated with the absorber spray header through a solution pump, the two ends of the solution pipeline II are respectively connected with the bottom opening of the solution cup b, the generator spray header is arranged on the solution pipeline II, the bottom of the condenser shell tube is communicated with the evaporator shell tube through a U-shaped evaporator shell tube to the evaporator spray header through the evaporator spray header, the water pump is arranged at the bottom of the evaporator shell tube,
The fourth fin type heat exchange tube bundle tube and the second fin type heat exchange tube bundle tube form a cooling water circulation pipeline, the heat exchange inner water tube and the first fin type heat exchange tube bundle tube form a waste hot water heat supply circulation pipeline, and the third fin type heat exchange tube bundle tube and the fifth fin type heat exchange tube bundle tube form a chilled water circulation pipeline.
2. The drying apparatus for treating compressed air by utilizing waste heat of a screw air compressor according to claim 1, wherein: the waste heat water heating circulation pipeline is connected with a water receiver for waste heat recovery and a waste heat water circulation pump.
3. The drying apparatus for treating compressed air by utilizing waste heat of a screw air compressor according to claim 1, wherein: a water vapor channel a is connected between the upper space of the generator shell tube and the upper space of the condenser shell tube.
4. The drying apparatus for treating compressed air by utilizing waste heat of a screw air compressor according to claim 1, wherein: and the cooling water circulating pipeline is connected with a cooling water tower and a cooling water circulating pump.
5. The drying apparatus for treating compressed air by utilizing waste heat of a screw air compressor according to claim 1, wherein: the frozen water circulating pipeline is connected with a frozen water accumulator and a frozen water circulating pump.
6. The drying apparatus for treating compressed air by utilizing waste heat of a screw air compressor according to claim 1, wherein: a water vapor channel b is connected between the upper space of the evaporator shell and the upper space of the absorber shell.
7. The drying apparatus for treating compressed air by utilizing waste heat of a screw air compressor according to claim 1, wherein: the solution pipeline I and the solution pipeline II pass through a sealed shell and form the solution heat exchanger.
8. The drying apparatus for treating compressed air by utilizing waste heat of a screw air compressor according to claim 1, wherein: the condenser shell tube is externally connected with a vacuumizing device.
9. The drying apparatus for treating compressed air by utilizing waste heat of a screw air compressor according to claim 1, wherein: the heat exchanger shell and tube is provided with a water storage cup with a drainer at the bottom wall.
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