CN114603226B - Brazing furnace waste gas treatment system - Google Patents
Brazing furnace waste gas treatment system Download PDFInfo
- Publication number
- CN114603226B CN114603226B CN202210245085.4A CN202210245085A CN114603226B CN 114603226 B CN114603226 B CN 114603226B CN 202210245085 A CN202210245085 A CN 202210245085A CN 114603226 B CN114603226 B CN 114603226B
- Authority
- CN
- China
- Prior art keywords
- evaporator
- condenser
- flue gas
- waste
- inlet
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 239000002912 waste gas Substances 0.000 title claims abstract description 66
- 238000005219 brazing Methods 0.000 title claims abstract description 36
- 239000003507 refrigerant Substances 0.000 claims abstract description 75
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 68
- 239000003546 flue gas Substances 0.000 claims abstract description 68
- 239000002918 waste heat Substances 0.000 claims abstract description 54
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 43
- 239000000498 cooling water Substances 0.000 claims abstract description 35
- 238000005057 refrigeration Methods 0.000 claims abstract description 14
- 238000000746 purification Methods 0.000 claims abstract description 5
- 239000007788 liquid Substances 0.000 claims description 61
- 239000007789 gas Substances 0.000 claims description 18
- 239000000779 smoke Substances 0.000 claims description 9
- 229920000742 Cotton Polymers 0.000 claims description 7
- 239000000428 dust Substances 0.000 claims description 5
- 229920004933 Terylene® Polymers 0.000 claims description 4
- 239000004744 fabric Substances 0.000 claims description 4
- 239000005020 polyethylene terephthalate Substances 0.000 claims description 4
- 238000003466 welding Methods 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 3
- 230000001502 supplementing effect Effects 0.000 claims description 3
- 230000029058 respiratory gaseous exchange Effects 0.000 claims 1
- 238000001816 cooling Methods 0.000 abstract description 8
- 238000007710 freezing Methods 0.000 abstract description 8
- 230000008014 freezing Effects 0.000 abstract description 8
- 238000010438 heat treatment Methods 0.000 abstract description 6
- 239000002699 waste material Substances 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 6
- 238000011084 recovery Methods 0.000 description 4
- 230000030279 gene silencing Effects 0.000 description 3
- 238000001704 evaporation Methods 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 230000036541 health Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000000137 annealing Methods 0.000 description 1
- 229910000963 austenitic stainless steel Inorganic materials 0.000 description 1
- 239000012752 auxiliary agent Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 229910001105 martensitic stainless steel Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 238000005496 tempering Methods 0.000 description 1
- 239000002341 toxic gas Substances 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K1/00—Soldering, e.g. brazing, or unsoldering
- B23K1/008—Soldering within a furnace
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/02—Particle separators, e.g. dust precipitators, having hollow filters made of flexible material
- B01D46/023—Pockets filters, i.e. multiple bag filters mounted on a common frame
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K3/00—Tools, devices, or special appurtenances for soldering, e.g. brazing, or unsoldering, not specially adapted for particular methods
- B23K3/08—Auxiliary devices therefor
- B23K3/085—Cooling, heat sink or heat shielding means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B27/00—Machines, plants or systems, using particular sources of energy
- F25B27/02—Machines, plants or systems, using particular sources of energy using waste heat, e.g. from internal-combustion engines
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B9/00—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point
- F25B9/08—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point using ejectors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D15/00—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies
- F28D15/02—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies in which the medium condenses and evaporates, e.g. heat pipes
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/27—Relating to heating, ventilation or air conditioning [HVAC] technologies
- Y02A30/274—Relating to heating, ventilation or air conditioning [HVAC] technologies using waste energy, e.g. from internal combustion engine
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Chimneys And Flues (AREA)
- Treating Waste Gases (AREA)
Abstract
The invention discloses a brazing furnace waste gas treatment system which comprises a high-temperature flue gas waste heat refrigeration structure and a waste gas purification structure, wherein the high-temperature flue gas waste heat refrigeration structure comprises a flue gas waste heat recoverer, an ejector, a condenser, a refrigerant pump, an expansion valve, an evaporator and the like which are connected through pipelines, a water inlet and a water outlet of the condenser are connected into a brazing furnace cooling water tower and a cooling water pump, and a water inlet and a water outlet of the evaporator are connected into a brazing furnace freezing water tank and a freezing water pump. The waste gas purifying structure comprises a valve, a three-way pipe and a waste gas purifying box, wherein the waste gas purifying box is connected with the high-temperature flue gas waste heat refrigerating structure through the three-way pipe, and purified waste gas is discharged into the atmosphere through an air outlet. The invention utilizes the high-temperature flue gas waste heat refrigeration structure to carry out waste heat refrigeration on the high-temperature flue gas exhausted by the preheating and heating areas of the brazing furnace by combining with the cooling part of the brazing furnace, improves the efficiency of a cooling system, reduces energy waste, and simultaneously uses the waste gas purifying device to purify the heat exchanged flue gas and the low-temperature waste gas from the brazing curtain chamber, thereby reducing the pollution to the environment.
Description
Technical Field
The invention relates to the technical field of brazing furnaces, in particular to a brazing furnace waste gas treatment system.
Background
A brazing furnace is an apparatus for metal brazing and bright heat treatment. Suitable for small and medium-sized stainless steel parts (tableware, cutters, hardware, etc.) produced in batches, such as bright quenching and tempering of martensitic stainless steel and bright annealing of austenitic stainless steel.
Because the preheating zone and the heating zone in the brazing furnace are mainly heated by adopting a burner in recent years, high-temperature flue gas can be generated in the gas heating process, a large amount of waste heat is carried when the high-temperature flue gas is discharged out of the furnace, the energy waste caused by the discharge of the high-temperature flue gas into the air through a ventilation pipeline is large, and the untreated flue gas is directly discharged to pollute the workshop environment. In addition, the brazing furnace can generate waste gas in a brazing curtain chamber during brazing, the main components of the waste gas come from welding auxiliary agents, and toxic gas and particles contained in low-temperature waste gas formed after cooling are directly discharged, so that the harm to human health can be caused, and the environment is polluted.
The object of the present invention is to solve the above technical problems at least to some extent.
Disclosure of Invention
Aiming at the technical problems existing in the prior art, the invention aims to provide a braze welding furnace waste gas treatment system.
The technical scheme of the invention is as follows:
the brazing furnace waste gas treatment system comprises a high-temperature flue gas waste heat refrigeration structure and a waste gas purification structure, wherein the high-temperature flue gas waste heat refrigeration structure comprises a flue gas waste heat recoverer, an ejector, a condenser, a refrigerant pump, an expansion valve, an evaporator and the like, and all the components are connected through pipelines. The waste gas purifying structure comprises a valve, a three-way pipe and a waste gas purifying box, wherein the waste gas purifying box is connected with the high-temperature flue gas waste heat utilization structure through the three-way pipe, and the valve is arranged on the three-way pipe.
The gas outlet of the flue gas waste heat recoverer is connected with the inlet of the ejector, the outlet of the ejector is connected with the inlet of the condenser, the first drainage port of the condenser is communicated with the liquid inlet of the flue gas waste heat recoverer through the refrigerant pump, the second drainage port of the condenser is connected with the liquid inlet of the evaporator through the expansion valve, and the gas outlet of the evaporator is connected with the inlet of the ejector; the outlet of the flue gas waste heat recoverer is communicated with the waste gas purifying box through a three-way pipe, and the valve is arranged on two branches of the three-way pipe.
The flue gas waste heat recoverer is a heat pipe waste heat recoverer and comprises a recoverer box body and heat pipes, wherein the recoverer box body is divided into an upper box body and a lower box body, the lower box body is provided with a smoke inlet and a smoke outlet, the upper box body is provided with a liquid inlet and a gas outlet, a plurality of heat pipes are uniformly arranged in the recoverer box body, after high-temperature flue gas enters the lower box body from the smoke inlet, the heat pipes are used for carrying out heat exchange to heat refrigerant liquid input by the liquid inlet in the upper box body to generate refrigerant steam, and the refrigerant steam enters the ejector through a pipeline; the ejector is used for compressing the refrigerant steam from the flue gas waste heat recoverer and the refrigerant steam of the evaporator, and delivering the mixed steam to the condenser for generating the refrigerant steam.
The condenser comprises a condenser shell tube, a condenser bracket, a first drainage port, a second drainage port, a condenser tube plate, a cooling water inlet, a cooling water outlet, a condenser heat transfer tube and a condenser air inlet, wherein the condenser heat transfer tube is arranged on the condenser tube plate and is connected with the cooling water inlet and the cooling water outlet, cooling water is provided by a cooling water tower of a brazing furnace through a cooling water pump, refrigerant steam output from an ejector enters the condenser from the condenser air inlet, and the refrigerant steam is subjected to heat exchange with the cooling water in the condenser heat transfer tube through the condenser heat transfer tube to generate refrigerant liquid to be discharged from the first drainage port and the second drainage port respectively.
The inlet end of the refrigerant pump is communicated with the first drainage port, the outlet end of the refrigerant pump is connected with the liquid inlet of the flue gas waste heat device, and the refrigerant pump receives the refrigerant liquid from the first drainage port and conveys the refrigerant liquid to the liquid inlet for supplementing the refrigerant liquid in the flue gas waste heat device.
The expansion valve is arranged at the inlet of the evaporator, throttles the refrigerant liquid into low-temperature low-pressure vaporific hydraulic refrigerant, and creates conditions for the evaporation of the refrigerant. The temperature sensing bag in the expansion valve is arranged on the air outlet of the evaporator and is in close contact with the pipeline to sense the temperature of superheated steam at the outlet of the evaporator, so that the expansion valve is adjusted.
The evaporator comprises an evaporator shell tube, an evaporator tube plate, an evaporator support, an evaporator liquid inlet, an evaporator air outlet, a chilled water liquid outlet, a heat transfer tube, a flow dividing plate and a chilled water liquid inlet, wherein the heat transfer tube is arranged on the evaporator tube plate and connected with the evaporator liquid inlet and the evaporator air outlet, chilled water enters the evaporator from the chilled water liquid inlet, flows out of the chilled water liquid outlet after being subjected to flow division refrigeration through the heat transfer tube and the flow dividing plate, and is provided by a chilled water pump through a chilled water tank of a brazing furnace.
The valve is a butterfly valve and is respectively arranged on two pipelines of the three-way pipe and used for controlling the entry of low-temperature flue gas and waste gas.
The waste gas purifying box comprises a box body, a ground foot, a box door, a filter bag support, an impeller, a motor, silencing cotton, an air inlet and an air outlet, wherein the filter bag and the filter bag support are arranged in a lower cavity of the box body, the impeller and the motor are arranged in the lower cavity of the box body, silencing cotton is arranged in an upper cavity of the box body, noise generated during operation is reduced, waste gas enters the waste gas purifying box through the air inlet, the motor drives the impeller to rotate for sucking the waste gas into the filter bag, and the waste gas is discharged through the air outlet after dust removal of the filter bag, so that the waste gas purifying work is completed.
The filter bags and the filter bag supports are combined to form a cloth bag, waste gas is filtered, the filter bags are made of terylene materials, and a plurality of filter bags are neatly arranged in the waste gas purifying box.
Compared with the prior art, the invention has the following beneficial effects:
1. and the high-temperature flue gas directly discharged by the brazing furnace is subjected to waste heat refrigeration by using waste heat utilization equipment, and the refrigeration condenser and the evaporator are connected with a water cooling circulation system of the brazing furnace, so that the efficiency of a cooling system is improved, and the energy loss is reduced.
2. The waste gas purifying box is further arranged, the temperature of the waste gas is reduced after waste heat recovery, the dust removing efficiency is improved, the waste gas purifying box adopts a cloth bag type dust removing structure, the dust removing efficiency is high, the performance is stable, pollutants contained in the waste gas are effectively treated, the emission pollution is reduced, and the harm to human health and the environment is reduced.
3. The butterfly valve and the three-way pipeline are arranged to treat high-temperature flue gas and low-temperature waste gas generated by the residual heat area, the heating area and the brazing curtain chamber of the brazing furnace singly or comprehensively, so that the equipment has strong applicability.
Drawings
FIG. 1 is an overall block diagram of the present invention;
FIG. 2 is a heat exchange structure diagram of the flue gas waste heat recovery device of the invention;
FIG. 3 is a heat exchange block diagram of a condenser of the present invention;
FIG. 4 is a diagram of the heat exchange structure of the evaporator of the present invention;
fig. 5 is a structural view of the exhaust gas purifying tank of the present invention;
FIG. 6 is a schematic diagram of a system according to the present invention.
In the figure: 1. a flue gas waste heat recoverer; 11. a recycler box; 12. a heat pipe; 13. a smoke inlet; 14. a smoke outlet; 15. a liquid inlet; 16. an air outlet; 2. an ejector; 3. a condenser; 31. a condenser shell tube; 32. a condenser bracket; 33. a first drainage port; 34. a second drainage port; 35. condenser tube plates; 36. a cooling water inlet; 37. a cooling water outlet; 38. a condenser heat transfer tube; 39. a condenser air inlet; 4. a refrigerant pump; 5. an expansion valve; 6. an evaporator; 61. an evaporator shell tube; 62. evaporator tube sheets; 63. an evaporator support; 64. a liquid inlet of the evaporator; 65. an evaporator air outlet; 66. a chilled water outlet; 67. a heat transfer tube; 68. a diverter plate; 69. a chilled water inlet; 7. a valve; 8. a three-way pipe; 9. an exhaust gas purifying tank; 91. a case; 92. a foot margin; 93. a door; 94. a filter bag; 95. a filter bag support; 96. an impeller; 97. a motor; 98. silencing cotton; 99. an air inlet; 910. and an exhaust port.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described in detail below with reference to the accompanying drawings and examples of the present invention. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
On the contrary, the invention is intended to cover any alternatives, modifications, equivalents, and variations as may be included within the spirit and scope of the invention as defined by the appended claims. Further, in the following detailed description of the present invention, certain specific details are set forth in order to provide a better understanding of the present invention. The present invention will be fully understood by those skilled in the art without the details described herein.
Reference is made to FIGS. 1-6
The utility model provides a braze welding furnace exhaust-gas treatment system, includes high temperature flue gas waste heat refrigeration structure and exhaust purification structure, and high temperature flue gas waste heat refrigeration structure includes parts such as flue gas waste heat recoverer 1, sprayer 2, condenser 3, refrigerant pump 4, expansion valve 5 and evaporimeter 6, passes through the pipe connection between each part. The waste gas purifying structure comprises a valve 7, a three-way pipe 8 and a waste gas purifying box 9, wherein the waste gas purifying box 9 is connected with the high-temperature flue gas waste heat utilization structure through the three-way pipe 8, and the valve 7 is arranged on the three-way pipe 8.
The specific connection relation of each component is as follows: the gas outlet 16 of the flue gas waste heat recovery device 1 is connected with the inlet of the ejector 2, the outlet of the ejector 2 is connected with the inlet of the condenser 3, the first drainage port 33 of the condenser 3 is communicated with the liquid inlet 15 of the flue gas waste heat recovery device 1 through the refrigerant pump 4, the second drainage port 34 of the condenser 3 is connected with the evaporator liquid inlet 64 of the evaporator 6 through the expansion valve 5, and the evaporator gas outlet 65 of the evaporator 6 is connected with the inlet of the ejector 2; the smoke outlet 14 of the smoke waste heat recoverer 1 is communicated with the waste gas purifying box 9 through a three-way pipe 8, and the valve 7 is arranged on two branches of the three-way pipe 8.
In contrast to fig. 2, the flue gas waste heat recoverer 1 is a heat pipe waste heat recoverer, and comprises a recoverer box 11 and heat pipes 12, wherein the recoverer box 11 is divided into an upper box and a lower box, the lower box is provided with a flue inlet 13 and a flue outlet 14, the upper box is provided with a liquid inlet 15 and a gas outlet 16, a plurality of heat pipes 12 are uniformly arranged in the recoverer box 11, high-temperature flue gas enters the lower box from the flue inlet 13, and after heat exchange is carried out through the heat pipes 12, refrigerant liquid input by the liquid inlet 15 in the upper box is heated to generate refrigerant steam, and the refrigerant steam enters the ejector 2 through a pipeline;
further, the ejector 2 and the flue gas waste heat recoverer 1 are connected by a pipe for compressing the refrigerant vapor from the flue gas waste heat recoverer 1 and the refrigerant vapor of the evaporator 6 and delivering the mixed vapor to the condenser 3 for producing the refrigerant liquid.
In contrast to fig. 3, the condenser 3 includes a condenser shell tube 31, a condenser bracket 32, a first drainage port 33, a second drainage port 34, a condenser tube plate 35, a cooling water inlet 36, a cooling water outlet 37, a condenser heat transfer tube 38, and a condenser air inlet 39. The condenser heat transfer tube 38 is mounted on the condenser tube plate 35 and connected to the cooling water inlet 36 and the cooling water outlet 37, the cooling water is supplied from the cooling water tower of the brazing furnace by the cooling water pump, the refrigerant vapor output from the ejector 2 enters the condenser from the condenser air inlet 39, and the refrigerant vapor exchanges heat with the cooling water in the condenser heat transfer tube 38 through the condenser heat transfer tube 38 to generate refrigerant liquid to be discharged from the first drainage port 33 and the second drainage port 34, respectively.
As can be seen by comparing fig. 1, 2 and 3, the inlet end of the refrigerant pump 4 is connected to the first drainage port 33, the outlet end is connected to the inlet 15 of the flue gas waste heat device 1, and the refrigerant pump 4 receives the refrigerant liquid from the first drainage port 33 and delivers it to the inlet 15 for supplementing the refrigerant liquid in the flue gas waste heat device 1.
The expansion valve 5 is installed at the inlet of the evaporator 6 to throttle the refrigerant into a low-temperature low-pressure vaporous hydraulic refrigerant, thereby creating conditions for the evaporation of the refrigerant. The bulb in the expansion valve 5 is tied to the evaporator outlet 65 and is in close contact with the pipe to sense the superheated steam temperature of the evaporator outlet 65, thereby adjusting the expansion valve 5.
Referring to fig. 4, the evaporator 6 includes an evaporator shell tube 61, an evaporator tube plate 62, an evaporator bracket 63, an evaporator liquid inlet 64, an evaporator air outlet 65, a chilled water liquid outlet 66, a heat transfer tube 67, a flow dividing plate 68, and a chilled water liquid inlet 69. The heat transfer pipe 67 is installed on the evaporator tube plate 62 and is connected with the evaporator liquid inlet 64 and the evaporator air outlet 65, chilled water enters the evaporator 6 from the chilled water liquid inlet 69, and flows out from the chilled water liquid outlet 66 after being split-cooled by the heat transfer pipe 67 and the splitter plate 68, and the chilled water is provided by a chilled water tank of a brazing furnace through a chilled water pump.
The valve 7 is a butterfly valve and is respectively arranged on two pipelines of the three-way pipe 8 and used for controlling the entry of low-temperature flue gas and waste gas.
Referring to fig. 5, the exhaust gas purifying box 9 includes a box body 91, a foot 92, a box door 93, a filter bag 94, a filter bag holder 95, an impeller 96, a motor 97, a noise damping cotton 98, an air inlet 99, and an air outlet 910. The filter bag 94 and the filter bag bracket 95 are arranged in the lower cavity of the box body 91, the impeller 96 and the motor 97 are arranged in the lower cavity of the box body 91, the noise reduction cotton 98 is arranged in the upper cavity of the box body 91, noise generated during operation is reduced, waste gas enters the waste gas purifying box 9 through the air inlet 99, the motor 97 drives the impeller 96 to rotate for sucking the waste gas into the filter bag 94, and the waste gas is discharged through the air outlet 910 after being dedusted by the filter bag 94, so that the waste gas purifying work is completed.
The filter bags 94 and the filter bag brackets 95 are combined to form a cloth bag, waste gas is filtered, the filter bags 94 are made of terylene materials, and a plurality of filter bags 94 are neatly arranged in the waste gas purifying box 9.
FIG. 6 is a schematic diagram of the system of the present invention, which operates as follows:
firstly, a brazing furnace cooling water tower and a cooling water pump are connected with a cooling water inlet 36 and a cooling water outlet 37 in a condenser 3, a brazing furnace freezing water tank and a freezing water pump are connected with a freezing water inlet 69 and a freezing water outlet 66 in an evaporator 6, then a valve 7 in a three-way pipe 8 and a flue gas waste heat recoverer 1 are opened, and the other valve 7 is closed. When the preheating zone and the heating zone of the brazing furnace work to generate high-temperature flue gas, the high-temperature flue gas is connected into the flue gas waste heat recoverer 1, the high-temperature flue gas exchanges heat into the upper box body through the heat pipe 12, and the refrigerant liquid in the upper box body is heated to generate refrigerant steam. The refrigerant steam enters the ejector 2 and is mixed with the refrigerant steam from the evaporator 6 to be pressurized to form high-temperature high-pressure refrigerant steam, the high-temperature high-pressure refrigerant steam enters the condenser 3, the high-temperature high-pressure refrigerant steam exchanges heat with a cooling water loop in a condenser heat transfer pipe, and low-temperature high-pressure refrigerant liquid is formed after cooling. The low-temperature low-pressure refrigerant liquid is throttled by the expansion valve 5 to generate low-temperature low-pressure refrigerant liquid, then enters the evaporator 6, after the chilled water is introduced into the evaporator 6, the chilled water exchanges heat with the low-temperature low-pressure refrigerant liquid in the heat transfer pipe 67, and then the chilled water is cooled and refrigerated. The low-temperature low-pressure refrigerant liquid absorbs heat to form high-temperature low-pressure refrigerant steam which is connected into the ejector 2, and the low-temperature high-pressure refrigerant liquid is conveyed to the flue gas waste heat recoverer through the refrigerant pump 4 to form a refrigerant circulation structure, so that the waste heat refrigeration work of high-temperature flue gas is completed.
The converted low-temperature flue gas then enters the waste gas purifying box 9, the motor 97 drives the impeller 96 to rotate to generate negative pressure, so that the low-temperature flue gas is filtered and collected by the terylene filter bag 94, and purified gas is discharged from the exhaust port 910 of the waste gas purifying box 9, thereby completing the waste gas purifying work. In addition, two valves 7 can be opened simultaneously to treat high-temperature flue gas and low-temperature waste gas simultaneously, the valve 7 in the three-way pipe 8 and the valve 7 in the flue gas waste heat recoverer 1 can be closed selectively, and the other valve 7 is opened and closed to only clean the low-temperature waste gas from the brazing curtain chamber, so that the equipment applicability is strong.
According to the invention, the water inlet and outlet of the condenser are connected to the brazing furnace cooling water tower and the cooling water pump, the water inlet and outlet of the evaporator is connected to the brazing furnace freezing water tank and the freezing water pump, the high-temperature flue gas waste heat refrigeration structure is combined with the brazing furnace water cooling system, so that the efficiency of the brazing furnace cooling system is improved, the energy waste is reduced, and meanwhile, the flue gas after heat exchange and the low-temperature waste gas from the brazing curtain chamber are purified by the waste gas purification device, and the pollution to the environment is reduced.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.
Claims (6)
1. A braze welding furnace exhaust gas treatment system, characterized in that: the high-temperature flue gas waste heat refrigerating structure comprises a flue gas waste heat recoverer (1), an ejector (2), a condenser (3), a refrigerant pump (4), an expansion valve (5) and an evaporator (6) which are connected through pipelines, wherein the waste gas purifying structure comprises a valve (7), a three-way pipe (8) and a waste gas purifying box (9), the waste gas purifying box (9) is connected with the high-temperature flue gas waste heat refrigerating structure through the three-way pipe (8), and the valve (7) is arranged on the three-way pipe (8);
the gas outlet (16) of the flue gas waste heat recoverer is connected with the inlet of the ejector (2), the outlet of the ejector (2) is connected with the inlet of the condenser (3), the first drainage port (33) of the condenser (3) is communicated with the liquid inlet (15) of the flue gas waste heat recoverer (1) through the refrigerant pump (4), the second drainage port (34) of the condenser (3) is connected with the evaporator liquid inlet (64) of the evaporator (6) through the expansion valve (5), and the evaporator gas outlet (65) of the evaporator (6) is connected with the inlet of the ejector (2); the smoke outlet (14) of the smoke waste heat recoverer (1) is communicated with the waste gas purifying box (9) through a three-way pipe (8), and the valve (7) is arranged on two branches of the three-way pipe (8);
the flue gas waste heat recoverer (1) is a heat pipe waste heat recoverer and comprises a recoverer box body (11) and heat pipes (12), wherein the recoverer box body (11) is divided into an upper box body and a lower box body, the lower box body is provided with a flue gas inlet (13) and a flue gas outlet (14), the upper box body is provided with a liquid inlet (15) and a gas outlet (16), a plurality of heat pipes (12) are uniformly arranged inside the recoverer box body (11), after high-temperature flue gas enters the lower box body from the flue gas inlet (13), the heat pipes (12) are used for carrying out heat exchange to heat a refrigerant liquid input by the liquid inlet (15) in the upper box body to generate refrigerant vapor, the refrigerant vapor enters an ejector (2) through a pipeline, and the ejector (2) is used for compressing the refrigerant vapor from the flue gas waste heat recoverer (1) and the refrigerant vapor from the evaporator (6) and conveying the mixed vapor to the condenser (3) for generating the refrigerant liquid;
the valve (7) is a butterfly valve and is respectively arranged on two pipelines of the three-way pipe (8) and used for controlling the entry of low-temperature flue gas and waste gas;
waste gas purifying case (9) include box (91), lower margin (92), chamber door (93), filter bag (94), filter bag support (95), impeller (96), motor (97), amortization cotton (98), air inlet (99) and gas vent (910), filter bag (94) and filter bag support (95) set up in the lower intracavity of box (91), impeller (96) and motor (97) set up in the lower intracavity of box (91), amortization cotton (98) are arranged in the box (91) epicoele, noise that produces when reducing the work, waste gas gets into waste gas purifying case (9) by air inlet (99), drive impeller (96) rotatory breathing in with waste gas suction filter bag (94) by motor (97), be discharged by gas vent (910) after the dust removal of filter bag (94), accomplish the purification work of waste gas.
2. A braze furnace exhaust treatment system as recited in claim 1, wherein: the condenser (3) comprises a condenser shell tube (31), a condenser bracket (32), a first drainage port (33), a second drainage port (34), a condenser tube plate (35), a cooling water inlet (36), a cooling water outlet (37), a condenser heat transfer tube (38) and a condenser air inlet (39), wherein the condenser heat transfer tube (38) is arranged on the condenser tube plate (35) and is connected with the cooling water inlet (36) and the cooling water outlet (37), cooling water is provided by a cooling water tower of a brazing furnace through a cooling water pump, refrigerant steam output from the ejector (2) enters the condenser from the condenser air inlet (39), and refrigerant steam is exchanged with cooling water in the condenser heat transfer tube (38) through the condenser heat transfer tube (38) to generate refrigerant liquid to be discharged from the first drainage port (33) and the second drainage port (34) respectively.
3. A braze furnace exhaust treatment system as recited in claim 2, wherein: the inlet end of the refrigerant pump (4) is communicated with the first drainage port (33), the outlet end of the refrigerant pump (4) is connected with the liquid inlet (15) of the flue gas waste heat recoverer (1), and the refrigerant pump (4) receives the refrigerant liquid from the first drainage port (33) and conveys the refrigerant liquid to the liquid inlet (15) for supplementing the refrigerant liquid in the flue gas waste heat recoverer (1).
4. A braze furnace exhaust treatment system as recited in claim 1, wherein: the expansion valve (5) is arranged at the inlet of the evaporator (6) to throttle the refrigerant liquid into low-temperature low-pressure vaporific hydraulic refrigerant, and the temperature sensing bag in the expansion valve (5) is arranged on the air outlet (65) of the evaporator and is in close contact with a pipeline.
5. A braze furnace exhaust treatment system as recited in claim 1, wherein: the evaporator (6) comprises an evaporator shell tube (61), an evaporator tube plate (62), an evaporator bracket (63), an evaporator liquid inlet (64), an evaporator air outlet (65), a chilled water liquid outlet (66), a heat transfer tube (67), a flow dividing plate (68) and a chilled water liquid inlet (69), wherein the heat transfer tube (67) is arranged on the evaporator tube plate (62) and connected with the evaporator liquid inlet (64) and the evaporator air outlet (65), chilled water enters the evaporator (6) from the chilled water liquid inlet (69), flows out from the chilled water liquid outlet (66) after being subjected to flow division refrigeration through the heat transfer tube (67) and the flow dividing plate (68), and is provided by a chilled water tank of a brazing furnace through a chilled water pump.
6. A braze furnace exhaust treatment system as recited in claim 1, wherein: the filter bag (94) and the filter bag support (95) are combined to form a cloth bag, waste gas is filtered, the filter bag (94) is made of terylene materials, and the filter bags (94) are neatly arranged in the waste gas purifying box (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210245085.4A CN114603226B (en) | 2022-03-14 | 2022-03-14 | Brazing furnace waste gas treatment system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210245085.4A CN114603226B (en) | 2022-03-14 | 2022-03-14 | Brazing furnace waste gas treatment system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114603226A CN114603226A (en) | 2022-06-10 |
| CN114603226B true CN114603226B (en) | 2024-04-02 |
Family
ID=81863407
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210245085.4A Active CN114603226B (en) | 2022-03-14 | 2022-03-14 | Brazing furnace waste gas treatment system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114603226B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117066748A (en) * | 2023-10-16 | 2023-11-17 | 扬州市杨永焊管设备制造有限公司 | Pipe welding equipment for thin-wall metal pipe |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201615649U (en) * | 2009-10-27 | 2010-10-27 | 中国石油化工股份有限公司 | Oil gas recycling device utilizing steam-ejection refrigeration |
| CN104889522A (en) * | 2015-06-17 | 2015-09-09 | 盐城市飞亚利机械有限公司 | Waste heat recovery type brazing furnace |
| CN105627622A (en) * | 2016-03-23 | 2016-06-01 | 上海海洋大学 | Jetting type auto-cascade refrigeration system for waste heat recovery of tuna clipper |
| CN206912432U (en) * | 2017-06-14 | 2018-01-23 | 浙江瑞光真空电气有限公司 | Curtain room waste gas purification apparatus before and after a kind of soldering oven |
| CN215034283U (en) * | 2021-03-10 | 2021-12-07 | 锦州华光开关管有限公司 | Air charging and exhausting cooling device of vertical vacuum brazing furnace |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6780225B2 (en) * | 2002-05-24 | 2004-08-24 | Vitronics Soltec, Inc. | Reflow oven gas management system and method |
-
2022
- 2022-03-14 CN CN202210245085.4A patent/CN114603226B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201615649U (en) * | 2009-10-27 | 2010-10-27 | 中国石油化工股份有限公司 | Oil gas recycling device utilizing steam-ejection refrigeration |
| CN104889522A (en) * | 2015-06-17 | 2015-09-09 | 盐城市飞亚利机械有限公司 | Waste heat recovery type brazing furnace |
| CN105627622A (en) * | 2016-03-23 | 2016-06-01 | 上海海洋大学 | Jetting type auto-cascade refrigeration system for waste heat recovery of tuna clipper |
| CN206912432U (en) * | 2017-06-14 | 2018-01-23 | 浙江瑞光真空电气有限公司 | Curtain room waste gas purification apparatus before and after a kind of soldering oven |
| CN215034283U (en) * | 2021-03-10 | 2021-12-07 | 锦州华光开关管有限公司 | Air charging and exhausting cooling device of vertical vacuum brazing furnace |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114603226A (en) | 2022-06-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN114603226B (en) | Brazing furnace waste gas treatment system | |
| CN1807848A (en) | Double-fluid steam type double power generation arrangement | |
| CN104958993A (en) | Novel desorption regeneration process and device using granular active carbon adsorption and vapor indirect heating | |
| CN201308802Y (en) | Freezing method gas dust removal dehumidification device | |
| CN210638065U (en) | Gas boiler flue gas is totally disappeared white and waste heat degree of depth recycle system | |
| CN202366602U (en) | Concentration and condensation recovery equipment for Freon in insulating layer of waste refrigerator | |
| CN210601824U (en) | Waste heat recovery system of range hood | |
| CN102251080A (en) | Direct gas quenching unit for mesh-belt continuous brazing furnace | |
| CN203704428U (en) | Flue gas hot water single-effect or dual-effect composite-type lithium bromide absorption-type cold water and cold hot water unit | |
| CN103759467A (en) | Two-section smoke hot water single-dual effect composite lithium bromide absorption refrigerating unit | |
| CN105605721A (en) | Device for utilizing exhaust gas in hot working workshop | |
| CN111023627A (en) | Heat pump normal-pressure single-effect evaporator and using method thereof | |
| CN214745672U (en) | Multistage waste heat comprehensive utilization device of power plant | |
| CN212902801U (en) | Organic waste gas condensation recovery device | |
| CN212457284U (en) | Isolation ward exhaust system of high-temperature CO2 air source heat pump | |
| CN205403238U (en) | Take gas gas heater's two -period form flue gas hot water type lithium bromide absorbed refrigeration machine | |
| CN205227927U (en) | Air source flue gas source heat pump hot water system | |
| CN2667415Y (en) | Residual heat type double-effect lithium bromide absorption type, cold water, cold/heat water machine set | |
| CN208704196U (en) | A kind of classification heat pump steam generation facility | |
| CN103759459A (en) | Flue gas and hot water single and double effect compounded lithium-bromide absorption refrigerating unit | |
| CN210332158U (en) | Catalytic combustion waste gas treatment system beneficial to desorption | |
| CN107621097A (en) | A kind of composite magnetic suspension cold water source pump | |
| CN108362034B (en) | Environment-friendly and efficient smoke type lithium bromide absorption type cold and hot water unit | |
| JP2003138949A (en) | Gas turbine intake device | |
| CN213454511U (en) | Water cooler of industrial waste heat recovery device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |