CN215638931U - Device for using waste heat of ammonia distillation waste liquid for increasing temperature of salt water - Google Patents
Device for using waste heat of ammonia distillation waste liquid for increasing temperature of salt water Download PDFInfo
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- CN215638931U CN215638931U CN202121829947.5U CN202121829947U CN215638931U CN 215638931 U CN215638931 U CN 215638931U CN 202121829947 U CN202121829947 U CN 202121829947U CN 215638931 U CN215638931 U CN 215638931U
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- 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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/52—Heat recovery pumps, i.e. heat pump based systems or units able to transfer the thermal energy from one area of the premises or part of the facilities to a different one, improving the overall efficiency
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Abstract
The utility model discloses a device for increasing the temperature of salt water by using waste heat of ammonia evaporation waste liquid, which comprises an ammonia evaporation waste liquid pool, wherein the ammonia evaporation waste liquid pool is connected with a waste liquid pump through a waste liquid pipeline and then is connected with a heat exchanger, the heat exchanger is provided with a heating medium water pipeline and a cooling medium water pipeline which are respectively connected with a heat pump, and the heat pump is also provided with a salt water supply/water outlet pipeline which is respectively connected with a salt water pump and a salt dissolving device; the heat pump is also provided with water inlet/outlet pipelines respectively connected to a water supply device, a steam and/or high-temperature hot water delivery device. According to the utility model, the heat in the ammonia distillation waste liquid is transferred to the refrigerant water through the heat exchanger, the heat of the heat medium water is transferred to the water supply by using the heat pump, high-temperature steam or hot water is produced, meanwhile, the waste heat of the heat pump is taken away by using the salt solution, so that the effect of killing two birds with one stone is achieved, the temperature of the ammonia distillation waste liquid is fully utilized through the heat pump, the recovery and the high-efficiency utilization of the low-temperature waste heat of the ammonia distillation waste liquid are realized, and the purposes of energy conservation, consumption reduction, cost reduction and efficiency improvement are achieved.
Description
Technical Field
The utility model relates to a device for using waste heat of ammonia distillation waste liquid for increasing the temperature of salt water.
Background
In the ammonia-soda process soda production process, the temperature of ammonia distillation waste liquid reaches more than 100 ℃, and huge heat is contained. Taking the ammonia-soda process soda production device of Shandong Hai chemical group soda plant as an example, the single plant has the largest capacity world, the discharge amount of the ammonia evaporation waste liquid is large, long-time technical exploration and a series of researches are carried out for recovering the heat of the ammonia evaporation waste liquid, firstly, the heat is recovered by utilizing the natural flash steam of the high-temperature ammonia evaporation waste liquid, and the device is put into industrial application, secondary flash is added on the basis of the natural flash of the waste liquid, the 0.35Mpa steam is used as power steam for injection flash, the low-pressure steam emitted by flash is used for production, the energy-saving and consumption-reducing effects are better, the temperature of the ammonia evaporation waste liquid can be reduced to be lower than 90 ℃, the heat is partially recovered, but further flash is limited by power and cost, and the further utilization of the heat is limited. At present, ammonia distillation waste liquid below 90 ℃ is discharged from a waste liquid pool through a waste liquid pump, so that heat waste is caused.
In the production processes of soda ash, chlor-alkali and the like, saturated salt water is required to be prepared, the saturated salt water is generally prepared by dissolving solid raw salt into salt dissolving water, and in the raw salt dissolving process, the salt dissolving speed is influenced by the temperature of the salt dissolving water, so that the production efficiency is influenced. At present, after the brine that the brine pump comes is heated to the steam that adopts in the production process usually, let in the salt dissolving device and carry out the salt dissolving to satisfy the production needs, if can adopt ammonia still process waste liquid waste heat to carry out the temperature, will reduce heat energy consumption by a wide margin.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem of overcoming the defects in the prior art and provides a device for using the waste heat of ammonia distillation waste liquid for increasing the temperature of salt water.
In order to solve the technical problem, the utility model comprises an ammonia distillation waste liquid pool, which is structurally characterized in that the ammonia distillation waste liquid pool is connected with a waste liquid pump through a waste liquid pipeline and then is connected with a heat exchanger, the heat exchanger is provided with a heating medium water pipeline and a cooling medium water pipeline which are respectively connected with a heat pump, and the heat pump is also provided with a salt dissolving water supply/water outlet pipeline which is respectively connected with a salt dissolving water pump and a salt dissolving device; the heat pump is also provided with water inlet/outlet pipelines respectively connected to a water supply device, a steam and/or high-temperature hot water delivery device.
The heat exchanger comprises a double-pipe heat exchanger, a shell-and-tube heat exchanger, a corrugated pipe heat exchanger, a scaling pipe heat exchanger, a plate heat exchanger, a shell-and-plate heat exchanger or a welded plate heat exchanger.
After adopting above-mentioned structure, carry the waste liquid in the ammonia still waste liquid pond to the heat exchanger through the waste liquid pump, with heat transfer to refrigerant water, as the heat source with heat transfer to heat pump by heat medium water again, set up the main advantage of heat exchanger and medium water: firstly, the abrasion of the ammonia evaporation waste liquid on the heat pump material is reduced, and high repair cost is avoided; secondly, the heat exchanger is independently arranged to extract heat, so that the heat exchange efficiency can be improved; thirdly, the medium water is beneficial to avoiding the ammonia evaporation waste liquid from polluting the heat absorption solvent in the heat pump.
The advantages of using the salt solution as the circulating cooling water of the heat pump are as follows: firstly, the heat taken away by the circulating cooling water is directly utilized, and good economic benefit is generated; and the chemical salt water temperature raising system replaces a conventional circulating water system, so that the power consumption required by heat removal after the circulating water is heated is saved, and the operating cost can be effectively reduced.
The device can fully utilize the waste heat of the ammonia distillation waste liquid, and can obtain steam and/or high-temperature hot water for other industrial production and life to generate good economic benefit.
Drawings
The following detailed description of embodiments of the utility model is provided in conjunction with the appended drawings:
FIG. 1 is a schematic view of the apparatus of the present invention.
Detailed Description
Referring to fig. 1, the device for using the waste heat of the ammonia evaporation waste liquid to heat the salt water comprises an ammonia evaporation waste liquid pool 1, wherein the ammonia evaporation waste liquid pool 1 is connected to a waste liquid pump 3 through a first waste liquid pipeline 2, then a second waste liquid pipeline 4 is connected to a heat exchanger 5, and then is output by a waste liquid discharge pipeline 6 to be discharged, and the heat exchanger 5 is provided with a heat medium water pipeline 7 and a refrigerant water pipeline 8 which are respectively connected to a heat pump 9 as heat supply components of the heat pump. The heat pump 9 is further provided with a brine water supply line 15 and a brine water outlet line 12 connected to a brine pump 14 and a salt dissolving device 13, respectively, and a brine water supply line 19 is connected in front of the brine pump 14 as a cooling component of the heat pump 9. The heat pump 9 is also provided with a water inlet pipeline 10 and a water outlet pipeline 11 which are respectively connected to a water supply device 16 and a steam and/or high-temperature hot water delivery device 17, the water supply device 16 is connected with a water inlet pipeline 20, and the steam and/or high-temperature hot water delivery device 17 outputs heat through a steam and/or high-temperature hot water output pipeline 18 to serve as a heat output part of the heat pump.
The heat exchanger 5 adopts a double-pipe heat exchanger, a shell-and-tube heat exchanger, a corrugated pipe heat exchanger, a scaling pipe heat exchanger, a plate-and-shell heat exchanger and a welded plate heat exchanger, wherein the ammonia distillation waste liquid passes through a pipe pass, and the medium water passes through a shell pass. The heat pump 9 is a second-class absorption heat pump, and the main structure inside the pump includes four parts, namely an absorber, a generator, a condenser and an evaporator, and the pump is a device which takes a low-temperature heat source (waste hot water) as a driving heat source, and prepares a high-temperature heat medium (high-temperature hot water and/or steam) with a temperature higher than that of the low-temperature heat source under the condition of adopting cooling water, so as to realize heat energy transmission from low temperature to high temperature. The waste heat in various forms, including waste hot water or other medium at 80 deg.c to produce hot water or steam at 20 deg.c higher than that of waste heat source, may be recovered and utilized. The use of circulating water is an important part of the energy consumption of the second type of heat pump, and the structure and the working principle of the heat pump 9 are common knowledge. The waste liquid pump 3, the salt dissolving device 13, the salt dissolving water pump 14, the water supply device 16 and the steam and/or high-temperature hot water conveying device 17 are all universal devices.
The working process of the utility model is as follows:
in the embodiment, ammonia evaporation waste liquid from an ammonia evaporation waste liquid pool 1 is used as a heat source, the temperature is 85 ℃, the ammonia evaporation waste liquid is conveyed to a heat exchanger 5 through a first waste liquid pipeline 2 and a waste liquid pump 3 through a second waste liquid pipeline 4, heat medium water from the heat exchanger 5 is conveyed to an absorber of a heat pump 9 through a heat medium water pipeline 7, cold medium water from the heat pump 9 returns to the heat exchanger 5 through a cold medium water pipeline 8 to continuously exchange heat, waste liquid after heat exchange is conveyed to resources through a waste liquid discharge pipeline 6 to be recycled, and calcium chloride and sodium chloride products are produced; the salt solution from the salt solution water supply pipeline 19 is used as cooling water, the temperature is 28 ℃, the salt solution pump 14 is conveyed to a cooler of the heat pump 9 through the salt solution water supply pipeline 15, the salt solution with the temperature of 52 ℃ is discharged after heat exchange by the heat pump 9 and is conveyed into the salt dissolving device 13 through the salt solution water outlet pipeline 12 for salt dissolving, the dissolving rate of the original salt is accelerated, and the production efficiency is improved; the temperature of water supplied from a water pipeline 20 is 22 ℃, the water is conveyed to a heat pump 9 by a water supply device 16 through a water inlet pipeline 10, the heat in the ammonia evaporation waste liquid is absorbed through the action of an absorber and an evaporator, the temperature of the water supplied is increased, low-pressure steam at 108 ℃ is obtained, and the low-pressure steam is output through a water outlet pipeline 11 and a steam and/or high-temperature hot water conveying device 17 and a steam and/or high-temperature hot water output pipeline 18 and is used for other industrial production.
Claims (2)
1. A device for using waste heat of ammonia evaporation waste liquid for increasing the temperature of salt solution comprises an ammonia evaporation waste liquid pool, and is characterized in that the ammonia evaporation waste liquid pool is connected with a waste liquid pump through a waste liquid pipeline and then is connected to a heat exchanger, the heat exchanger is provided with a heat medium water pipeline and a refrigerant water pipeline which are respectively connected to a heat pump, and the heat pump is also provided with a salt solution water supply/discharge pipeline which is respectively connected to a salt solution pump and a salt solution device; the heat pump is also provided with water inlet/outlet pipelines respectively connected to a water supply device, a steam and/or high-temperature hot water delivery device.
2. The device for increasing the temperature of the salt water by using the waste heat of the ammonia distillation waste liquid according to claim 1, wherein the heat exchanger comprises a double-pipe heat exchanger, a shell-and-tube heat exchanger, a corrugated pipe heat exchanger, a zoom pipe heat exchanger, a plate-and-shell heat exchanger or a welded plate heat exchanger.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121829947.5U CN215638931U (en) | 2021-08-06 | 2021-08-06 | Device for using waste heat of ammonia distillation waste liquid for increasing temperature of salt water |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121829947.5U CN215638931U (en) | 2021-08-06 | 2021-08-06 | Device for using waste heat of ammonia distillation waste liquid for increasing temperature of salt water |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215638931U true CN215638931U (en) | 2022-01-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121829947.5U Active CN215638931U (en) | 2021-08-06 | 2021-08-06 | Device for using waste heat of ammonia distillation waste liquid for increasing temperature of salt water |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215638931U (en) |
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2021
- 2021-08-06 CN CN202121829947.5U patent/CN215638931U/en active Active
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