CN220039214U - Waste heat recovery and utilization system for caustic soda flake production - Google Patents
Waste heat recovery and utilization system for caustic soda flake production Download PDFInfo
- Publication number
- CN220039214U CN220039214U CN202321278820.8U CN202321278820U CN220039214U CN 220039214 U CN220039214 U CN 220039214U CN 202321278820 U CN202321278820 U CN 202321278820U CN 220039214 U CN220039214 U CN 220039214U
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- China
- Prior art keywords
- pipe
- caustic soda
- water
- condenser
- mixing pipeline
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- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 title claims abstract description 118
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 21
- 239000002918 waste heat Substances 0.000 title claims abstract description 19
- 238000011084 recovery Methods 0.000 title claims abstract description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 83
- 239000003513 alkali Substances 0.000 claims abstract description 42
- 238000002156 mixing Methods 0.000 claims abstract description 39
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 33
- 239000003546 flue gas Substances 0.000 claims abstract description 33
- 238000005507 spraying Methods 0.000 claims abstract description 16
- 239000007788 liquid Substances 0.000 claims abstract description 14
- 238000010438 heat treatment Methods 0.000 claims abstract description 7
- 239000007921 spray Substances 0.000 claims description 24
- 238000010025 steaming Methods 0.000 claims description 6
- 239000005060 rubber Substances 0.000 claims description 4
- 238000009833 condensation Methods 0.000 claims 3
- 230000005494 condensation Effects 0.000 claims 3
- 235000011121 sodium hydroxide Nutrition 0.000 abstract description 32
- 238000010411 cooking Methods 0.000 abstract description 14
- 238000000034 method Methods 0.000 abstract description 13
- 239000002912 waste gas Substances 0.000 abstract description 6
- 239000000126 substance Substances 0.000 description 9
- 238000009835 boiling Methods 0.000 description 8
- 230000029087 digestion Effects 0.000 description 8
- 239000007789 gas Substances 0.000 description 7
- 239000012535 impurity Substances 0.000 description 7
- 238000001816 cooling Methods 0.000 description 4
- 238000004064 recycling Methods 0.000 description 4
- 229920000297 Rayon Polymers 0.000 description 3
- 239000003245 coal Substances 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- 238000001914 filtration Methods 0.000 description 3
- 239000003208 petroleum Substances 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000002964 rayon Substances 0.000 description 2
- 238000007670 refining Methods 0.000 description 2
- 239000000344 soap Substances 0.000 description 2
- 229920000298 Cellophane Polymers 0.000 description 1
- 229920000742 Cotton Polymers 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 238000000889 atomisation Methods 0.000 description 1
- 229910001570 bauxite Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007123 defense Effects 0.000 description 1
- 238000007791 dehumidification Methods 0.000 description 1
- 230000003009 desulfurizing effect Effects 0.000 description 1
- 239000003599 detergent Substances 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000000975 dye Substances 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000123 paper Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000000575 pesticide Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 238000009987 spinning Methods 0.000 description 1
- 239000000271 synthetic detergent Substances 0.000 description 1
- 239000004753 textile Substances 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
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- Paper (AREA)
Abstract
The utility model discloses a waste heat recovery and utilization system for caustic soda production, which comprises a caustic soda cooking device and a condenser, wherein the top of the caustic soda cooking device is communicated with an alkali steam pipe, one side of a bottom heating layer of the caustic soda cooking device is communicated with a flue gas pipe, one end of the alkali steam pipe and one end of the flue gas pipe are connected with a mixing pipeline together, a spraying mechanism is arranged on the mixing pipeline, one end of the mixing pipeline is communicated with an air inlet of the condenser through a heat exchange pipe, a liquid inlet of the condenser is connected with a caustic soda tank through an alkali pipe, a liquid outlet of the condenser is connected with the caustic soda cooking device through a preheating pipe, a condensed water pipe is connected with a condensed water outlet of the condenser, steam formed in the caustic soda cooking process and flue gas for providing heat for the caustic soda cooking device are converged into the mixing pipeline, the steam and the flue gas are cooled through the spraying mechanism on the mixing pipeline, then low-temperature alkali liquor in the caustic soda tank is preheated, and high-temperature waste gas in the caustic soda cooking process is reused.
Description
Technical Field
The utility model relates to the technical field of caustic soda flake production, in particular to a waste heat recycling system for caustic soda flake production.
Background
Caustic soda flakes, chemical name sodium hydroxide, white semitransparent flake solids, are basic chemical raw materials, and are widely used in the light spinning industry of paper making, synthetic detergents and soaps, viscose, rayon and cotton, the pesticide, dye, rubber and chemical industry, petroleum drilling, petroleum industry of refining petroleum grease and refining tar, and in the national defense industry, mechanical industry, wood processing, metallurgical industry, medical industry and city construction. It is also used for manufacturing chemicals, paper, soap and detergents, rayon and cellophane, processing bauxite to prepare alumina, mercerizing textile, water treatment, etc.
When the existing pot-type stewing method utilizes coal to heat, the temperature of the discharged flue gas and the heat in alkali steam are high, waste is caused by directly carrying out tail gas treatment, alkaline substances contained in the alkali steam form certain corrosion on a pipeline, and the service life of equipment is reduced.
Disclosure of Invention
The utility model aims to provide a waste heat recovery and utilization system for caustic soda flake production, which solves the problems that when the existing pot-type cooking method is used for heating by using coal, the temperature of discharged flue gas and the heat in alkali steam are high, waste is caused by directly carrying out tail gas treatment, alkaline substances contained in the alkali steam form certain corrosion on a pipeline, and the service life of equipment is reduced.
In order to solve the technical problems, the utility model provides a waste heat recovery and utilization system for caustic soda production, which comprises a caustic soda cooking device and a condenser, wherein an alkali steam pipe is communicated with the top of the caustic soda cooking device, a flue pipe is communicated with one side of a bottom heating layer of the caustic soda cooking device, a mixing pipeline is commonly connected with one end of the flue pipe by the alkali steam pipe, a spraying mechanism is arranged on the mixing pipeline, one end of the mixing pipeline is communicated with an air inlet of the condenser through a heat exchange pipe, a liquid inlet of the condenser is connected with a caustic soda tank through an alkali liquor pipe, a liquid outlet of the condenser is connected with the caustic soda cooking device through a preheating pipe, a condensate water outlet of the condenser is connected with a condensate water pipe, and a fan is arranged on the condensate water pipe.
As a preferred embodiment, the spraying mechanism comprises a water pipe arranged outside the mixing pipeline, one end of the water pipe is connected with a water supply tank, the lower surface of the water pipe is fixedly connected with a plurality of spraying pipes, and the other ends of the spraying pipes penetrate through the upper surface of the mixing pipeline and extend into the mixing pipeline.
As a preferred embodiment, the bottom side of the spray pipe is provided with an atomizing spray header.
As a preferred embodiment, the water supply tank further comprises a water return pipe, wherein one end of the water return pipe is connected with the bottom of the mixing pipeline, and the other end of the water return pipe is connected with the water supply tank;
the bottom one side of supply tank is connected with the filter through the filter pump, the discharge gate of filter pass through the filtration water pipe with supply tank top one side intercommunication.
As a preferred embodiment, the filter is a bag filter.
As a preferable implementation mode, a water-stopping rubber ring is arranged between the water delivery pipe and the spray pipe.
As a preferred embodiment, the condenser is a shell-and-tube heat exchanger.
Compared with the prior art, the waste heat recovery and utilization system for caustic soda flake production provided by the utility model at least comprises the following beneficial effects:
1. converging steam formed in the process of caustic soda sheet digestion and flue gas for providing heat for a caustic soda sheet digestion device into a mixing pipeline, cooling the steam and the flue gas through a spraying mechanism on the mixing pipeline, preheating low-temperature alkali liquor in an alkali liquor tank, and recycling high-temperature waste gas in the process of caustic soda sheet digestion;
2. the spraying mechanism is arranged on the mixing pipeline to spray alkaline substances in the mixing pipeline, so that the cleaning times of the mixing pipeline are reduced, and the service life of the caustic soda flake production equipment is prolonged;
3. the filter is arranged at one end of the water supply tank, impurities collected in the spray water are recovered through the filter, the recovery difficulty is effectively reduced, meanwhile, the filtered spray water can be reused, and the waste gas treatment cost is reduced.
Drawings
For a clearer description of the technical solutions of the present utility model, the drawings that are required to be used in the embodiments will be briefly described, and it will be obvious to those skilled in the art that other drawings can be obtained from these drawings without making any effort.
FIG. 1 is a schematic diagram of a system for recycling waste heat generated in caustic soda flakes according to the present utility model;
in the figure: 1. a caustic soda flake cooking device; 2. an alkali vapor tube; 3. a flue pipe; 4. a mixing pipe; 41. a water supply tank; 42. a filter pump; 43. a filter; 44. a filtering water pipe; 45. a water pipe; 46. a shower pipe; 47. an atomizing spray header; 48. a water return pipe; 5. a heat exchange tube; 6. a condenser; 61. an air inlet; 62. a condensed water outlet; 63. a liquid inlet; 64. a liquid outlet; 7. a preheating tube; 8. a condenser water pipe; 9. a blower; 10. an alkali liquor tube; 11. an alkali solution tank.
Detailed Description
In order to enable those skilled in the art to better understand the technical solutions of the present utility model, the following description will make clear and complete descriptions of the technical solutions of the embodiments of the present utility model with reference to the accompanying drawings.
The utility model aims to provide a waste heat recovery and utilization system for caustic soda flake production, which solves the problems that when the traditional pot-type cooking method is used for heating by using coal, the temperature of discharged flue gas and the heat in alkali steam are high, waste is caused by directly carrying out tail gas treatment, alkaline substances contained in the alkali steam form certain corrosion on a pipeline, and the service life of equipment is reduced.
Fig. 1 is a schematic structural diagram of a waste heat recovery and utilization system for caustic soda flake production, which is provided by the utility model, and is shown in fig. 1.
The waste heat recovery and utilization system for caustic soda flake production comprises a caustic soda flake digestion device 1 and a condenser 6, wherein the structure and the working principle of the caustic soda flake digestion device 1 can be seen in the prior art, and a pan-type digestion method is the prior art which is easily thought of, and is not the focus of the utility model, so the details are not provided herein. The top of the caustic soda sheet boiling device 1 is communicated with an alkali steam pipe 2, steam generated in the caustic soda sheet boiling process is discharged from the alkali steam pipe 2, the temperature of the steam generated in the caustic soda sheet boiling process is higher, alkaline substances are contained in the steam, one side of a bottom heating layer of the caustic soda sheet boiling device 1 is communicated with a flue gas pipe 3, flue gas heated by the caustic soda sheet boiling device 1 is discharged through the flue gas pipe 3, the temperature of the flue gas is higher, one ends of the caustic soda sheet boiling device 2 and the flue gas pipe 3 are commonly connected with a mixing pipeline 4, the steam and the flue gas generated in the caustic soda sheet boiling process are collected through the mixing pipeline 4, the steam and the flue gas cannot be directly preheated to liquid caustic soda with lower temperature due to the higher temperature, a spraying mechanism is arranged on the mixing pipeline 4, cooling treatment is carried out on the steam and the flue gas through the spraying mechanism, the spraying water sprays and removes solid impurities in the steam and the flue gas, and the treatment cost of the later stage is reduced. One end of the mixing pipeline 4 is communicated with an air inlet 61 of a condenser 6 through a heat exchange pipe 5, the structure and the working principle of the condenser 6 can be seen in the prior art, waste gas after cooling treatment enters the condenser 6 through the heat exchange pipe 5, a liquid inlet 63 of the condenser 6 is connected with an alkali liquor tank 11 through an alkali liquor pipe 10, alkali liquor placed in the alkali liquor tank 11 enters the condenser 6 through the liquid inlet 63, a liquid outlet 64 of the condenser 6 is connected with a caustic soda slice steaming device 1 through a preheating pipe 7, preheated alkali liquor can be added into the caustic soda slice steaming device 1 for boiling, a condensed water outlet 62 of the condenser 6 is connected with a condensed water pipe 8, a fan 9 is arranged on the condensed water pipe, flue gas and steam continuously enter the condenser 6 through the fan 9, heat in the flue gas and steam can be subjected to heat exchange with the alkali liquor in the alkali liquor tank 11 through the condenser 6, moisture in the flue gas and steam can be condensed and discharged in the heat exchange process, the dehumidification function is achieved, the heat in the flue gas and the steam can be fully recycled, and after the steam is discharged from the outlet 62, and the flue gas and steam can be subjected to subsequent drying and desulfurizing treatment.
The spraying mechanism is including setting up at the outside raceway 45 of mixing tube 4, the one end of raceway 45 is connected with water supply tank 41, place in the water supply tank 41 and spray required water, the lower fixed surface of raceway 45 is connected with a plurality of shower 46, during the actual setting, in order to improve the stability of raceway 45, can set up the bracing piece that is used for supporting raceway 45 in the top outside of mixing tube 4, the other end of shower 46 passes mixing tube 4 upper surface and extends to its inside, shower water in the water supply tank 41 gets into in a plurality of shower 46 through raceway 45, and then spray the gas in the mixing tube 4 through shower 46. Preferably, the bottom side of the spray pipe 46 is provided with an atomizing spray header 47. The spray water is atomized and sprayed out through the atomizing spray header 47, and the atomized water is fully contacted with the flue gas and the steam, so that solid impurity particles in the waste gas are fully captured.
In order to further save water resources, the embodiment further comprises a water return pipe 48, wherein one end of the water return pipe 48 is connected with the bottom of the mixing pipeline 4, the other end of the water return pipe 48 is connected with the water supply tank 41, and spray water collected in the mixing pipeline 4 flows back into the water supply tank 41 through the water return pipe 48; a filter 43 is connected to the bottom side of the water supply tank 41 through a filter pump 42, water in the water supply tank 41 is pumped out by the filter pump 42, and a discharge port of the filter 43 communicates with the top side of the water supply tank 41 through a filter water pipe 44. The water in the water supply tank 41 enters the filter 43 through the filter pump 42, so that impurities in the spray water can be filtered, the water filtered by the filter 43 returns to the water supply tank 41 again through the water filtering pipe 44, smoke and steam can be sprayed again, and when the water supply tank 41 is actually arranged, for example, when the water circulation use temperature in the water supply tank 41 is too high, a person skilled in the art can perform cooling treatment on the spray water according to requirements.
In order to facilitate the collection of impurities in the shower water, the filter 43 is, as a preferred embodiment, a bag filter. The inside of the bag filter is supported by a metal basket, spray water flows in from an inlet, flows out from an outlet after being filtered by the filter bag, and impurities are intercepted in the filter bag and can be continuously used after the filter bag is replaced regularly.
Preferably, a water-stopping rubber ring is arranged between the water delivery pipe 45 and the spray pipe 46, so that the usability of the device is improved. In order to improve the heat exchange efficiency of the alkali liquor and the waste gas, the condenser 6 is a shell-and-tube heat exchanger, the flue gas and the steam are added into the tube side, the alkali liquor is conveyed into the shell side of the condenser, the alkali liquor is preheated, and meanwhile, the evaporated gas is cooled and condensed into condensed water, so that the heat recycling is completed.
The utility model provides a waste heat recovery and utilization system for caustic soda flake production, which comprises a caustic soda flake digestion device 1, wherein steam generated during heating of alkali liquor enters a mixing pipeline 4 through an alkali steam pipe 2, flue gas for providing heat for the caustic soda flake digestion device 1 enters the mixing pipeline 4 through a flue gas pipe 3, water in a water supply tank 41 enters the mixing pipeline 4 through a water pipe 45 and a spray pipe 46, then is sprayed through an atomization spray header 47, the flue gas and the steam are cooled, impurities in the gas are captured, a fan 9 is started, the gas in the mixing pipeline 4 enters a condenser 6, heat in the flue gas and the steam exchanges heat with the alkali liquor in an alkali liquor tank 11 through the condenser 6, and moisture in the flue gas and the steam can be condensed and discharged in the heat exchange process, so that the heat in the flue gas and the steam is fully recovered.
Other embodiments of the utility model will be apparent to those skilled in the art from consideration of the specification and practice of the application disclosed herein. This application is intended to cover any variations, uses, or adaptations of the utility model following, in general, the principles of the utility model and including such departures from the present disclosure as come within known or customary practice within the art to which the utility model pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope of the utility model being indicated by the following claims.
It is to be understood that the utility model is not limited to the precise arrangements and instrumentalities shown in the drawings, which have been described above, and that various modifications and changes may be effected without departing from the scope thereof. The embodiments of the present utility model described above do not limit the scope of the present utility model.
Claims (7)
1. The utility model provides a piece alkali production waste heat recovery utilizes system which characterized in that includes: the device comprises a sheet alkali steaming device (1) and a condenser (6), wherein an alkali steam pipe (2) is arranged at the top of the sheet alkali steaming device (1) in a communicating manner, a flue gas pipe (3) is arranged at one side of a bottom heating layer of the sheet alkali steaming device (1) in a communicating manner, a mixing pipeline (4) is connected with one end of the flue gas pipe (3) in a common mode, a spraying mechanism is arranged on the mixing pipeline (4), one end of the mixing pipeline (4) is communicated with an air inlet (61) of the condenser (6) through a heat exchange pipe (5), an alkali liquid tank (11) is connected with a liquid inlet (63) of the condenser (6) through an alkali liquid pipe (10), a liquid outlet (64) of the condenser (6) is connected with the sheet alkali steaming device (1) through a preheating pipe (7), a condensation water pipe (8) is connected with a condensation water outlet (62) of the condenser (6), and a fan (9) is arranged on the condensation water pipe.
2. The caustic soda flake production waste heat recovery and utilization system according to claim 1, wherein the spraying mechanism comprises a water delivery pipe (45) arranged outside the mixing pipeline (4), one end of the water delivery pipe (45) is connected with a water supply tank (41), the lower surface of the water delivery pipe (45) is fixedly connected with a plurality of spraying pipes (46), and the other end of each spraying pipe (46) penetrates through the upper surface of the mixing pipeline (4) and extends into the mixing pipeline.
3. The caustic soda flake production waste heat recovery and utilization system of claim 2, wherein an atomizing spray header (47) is provided at the bottom side of the spray pipe (46).
4. The caustic soda flake production waste heat recovery and utilization system according to claim 2, further comprising a water return pipe (48), wherein one end of the water return pipe (48) is connected with the bottom of the mixing pipe (4), and the other end of the water return pipe (48) is connected with the water supply tank (41);
the bottom side of the water supply tank (41) is connected with a filter (43) through a filter pump (42), and a discharge hole of the filter (43) is communicated with the top side of the water supply tank (41) through a filter water pipe (44).
5. The caustic soda flake production waste heat recovery and utilization system of claim 4, wherein the filter (43) is a bag filter.
6. The waste heat recovery and utilization system for caustic soda flake production of claim 2, wherein a water stop rubber ring is arranged between the water pipe (45) and the spray pipe (46).
7. The caustic soda flake production waste heat recovery and utilization system of claim 1, wherein the condenser (6) is a shell-and-tube heat exchanger.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321278820.8U CN220039214U (en) | 2023-05-24 | 2023-05-24 | Waste heat recovery and utilization system for caustic soda flake production |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321278820.8U CN220039214U (en) | 2023-05-24 | 2023-05-24 | Waste heat recovery and utilization system for caustic soda flake production |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220039214U true CN220039214U (en) | 2023-11-17 |
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ID=88738302
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321278820.8U Active CN220039214U (en) | 2023-05-24 | 2023-05-24 | Waste heat recovery and utilization system for caustic soda flake production |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220039214U (en) |
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2023
- 2023-05-24 CN CN202321278820.8U patent/CN220039214U/en active Active
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