CN114307216A - Ammonia steam condensation cooling system of ammonia still utilizing air cooler - Google Patents
Ammonia steam condensation cooling system of ammonia still utilizing air cooler Download PDFInfo
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Abstract
The invention belongs to the technical field of ammonia vapor condensation cooling of ammonia stills, and particularly relates to an ammonia still ammonia vapor condensation cooling system utilizing an air cooler, which comprises a first-section air cooler, a gas-liquid separator and a second-section air cooler, wherein one end of the first-section air cooler is communicated with an ammonia vapor outlet of the ammonia still, the other end of the first-section air cooler is communicated with an inlet of the gas-liquid separator, and an air outlet of the gas-liquid separator is communicated with an air inlet of the second-section air cooler; the invention uses the air cooler on the ammonia steam cooling process of the ammonia still to replace a dephlegmator and an ammonia steam condensation cooler, is a revolutionary technical change and a subversive innovation on the aspect of the ammonia steam condensation cooling specialty of the ammonia still, has the advantages of energy saving, environmental protection, safety and simple and convenient operation, belongs to clean and environment-friendly production, develops a production process device with more energy saving, more environmental protection, lower cost, simpler and safer production process device, and has good optimization effect on various operation indexes of the ammonia still.
Description
Technical Field
The invention belongs to the technical field of ammonia steam condensation and cooling of ammonia stills, and particularly relates to an ammonia steam condensation and cooling system of an ammonia still by using an air cooler.
Background
As shown in figure 1, in the cooling system of domestic coke-oven plant, ammonia water enters an ammonia still a, the generated ammonia vapor enters an ammonia dephlegmator b, then is separated by a gas-liquid separator c, and the uncondensed ammonia vapor is condensed by an ammonia vapor condensing cooler d, and the process has the following defects:
1. the process adopts an open-circuit cooling tower circulating cooling water system f, prepared cooling water is introduced into a circulating cooling water reservoir g, a circulating cooling water pump e is adopted to convey the cooling water to the ammonia steam cooling process for cooling, the cooling water then flows back to a heat exchange system h for heat exchange, and the consumption index of fresh water of the coke per ton is high due to evaporation loss of the cooling tower water and the objective existence of frequent pollution discharge for ensuring water quality, and the energy consumption of unit process is difficult to control below a unit product energy consumption allowance admittance value 122kgce/t coke of a newly-built coke production device in coke unit product energy consumption allowance (GB 21342-2013); with the required quantity of circulating cooling water 4400m3Calculated by/h, the amount of water resources wasted per hour is specifically as follows: the evaporation loss is 82.94m3H, the loss of wind-blown splash is 4.4m3Per h, the pollution discharge loss is 39m3/h。
The total reserve of water on the earth is about 13.9 x 108Km3And about 97 percent of the salt water is ocean salt water which cannot be directly utilized by human beings. The total amount of fresh water is only 0.36 × 108Km3And 77.2% of fresh water which is less than 3% of the total water of the earth exists on polar regions and mountains in the form of glaciers and ice caps, and is difficult to be directly utilized by human; 22.4% is groundwater and soil water, wherein 2/3 groundwater is deeply buried in the ground; the total amount of ground water of rivers, lakes and the like is only 0.36 percent of the total amount of fresh water. Only 20% of fresh water is easy to be used by human beings, and the fresh water of rivers and lakes which can be directly taken and used only accounts for 0.3% of the total amount of the fresh water, and the fresh water resource for the direct use of human beingsThe source is very limited.
2. The chemicals added into the circulating water every day are a sterilizing algicide and a scale and corrosion inhibitor (corrosive), the annual chemical cost is 21 ten thousand yuan, the operation cost and the labor intensity of workers are increased, the environment is polluted, and the method is not energy-saving and environment-friendly.
3. The matched dephlegmator and ammonia vapor condensation cooler of the ammonia still of the coking industrial chemical production unit belong to the place which needs cooling medium with higher temperature difference, and are heavy disaster areas with high temperature and easy scaling, the heat exchange tube array circulating cooling water channel of the dephlegmator and the ammonia vapor condensation cooler is easy to scale, and needs chemical cleaning once every year, and the dephlegmator and the ammonia vapor condensation cooler have reduced the service life of equipment because of frequent cleaning and have caused equipment accidents such as internal leakage.
4. After the heat exchange tube array circulating cooling water channels of the dephlegmator and the ammonia vapor condensation cooler are scaled, waste liquid generated in the chemical cleaning process belongs to dangerous waste and is not easy to treat.
Therefore, the ammonia vapor condensation cooling system of the ammonia still needs to be improved.
Disclosure of Invention
In order to solve the technical problem, the invention provides an ammonia still ammonia steam condensation cooling system using an air cooler.
The invention is realized by the following technical scheme.
An ammonia tower ammonia vapor condensation cooling system utilizing an air cooler comprises a first-section air cooler, a gas-liquid separator and a second-section air cooler, wherein one end of the first-section air cooler is communicated with an ammonia vapor outlet of an ammonia tower, the other end of the first-section air cooler is communicated with an inlet of the gas-liquid separator, and an air outlet of the gas-liquid separator is communicated with an air inlet of the second-section air cooler;
the section of air cooler is the same with the two-section air cooler structure, and all includes two sets of heat transfer tubulation and draught fan, and is two sets of the heat transfer tubulation becomes the V type and arranges, the draught fan sets up in V type heat transfer tubulation top, and ammonia steam walks the tube side and with the indirect heat transfer is carried out to the air outside the heat transfer tubulation. Here need notice, the structural style of air condensing cooler is "V type induced air formula" structure, and the fan is in the top of V type air condensing cooler heat transfer tubulation, can not use the A type air cooling condenser of power plant, is difficult to collect the drainage of gathering in order to prevent the aqueous ammonia that the condensation got off, and can produce ammonium sulfate salt with the hydrogen sulfide in the gas mixture and block up the tubulation.
Preferably, the heat exchange tube nest is a tube body composed of a base layer and a coating, the base layer is made of carbon steel, the coating is made of 316L, fins are arranged on the outer wall of the heat exchange tube nest, and the fins are made of 1060 Al. The outer diameter of the row tube is 25mm, the wall thickness is 3mm, the fin height is 16mm, the fin thickness is 0.4m, the fin ratio is 23.4, the fin type DR is a fin type DR, and the tube drainage is a 4-row 2 process. The head-on wind speed is 2.8 m/s. The number of the tube bundles is 24, and the number of the single-tube-bundle heat exchange tubes is 182. The base layer and the coating layer are completely metallurgically combined, the composite material is a novel material, the complementary advantages of the material are fully realized, the composite material has the corrosion resistance, the wear resistance, the diamagnetism and the decoration of 316L, and has the good weldability, the formability, the drawability and the heat conductivity of carbon steel, the application of the composite material can obviously improve the strength, the rigidity and the impact load strength, the weight of a structural part is reduced, the technical requirement is ensured, the cost can be greatly reduced, and the composite material is a new-generation energy-saving and environment-friendly product.
Preferably, the first stage air cooler and the second stage air cooler are respectively provided with a set of low pressure compressed air cleaning system, and the low pressure compressed air cleaning system includes: the installation tube is vertically fixedly connected to the bottom frame, three compressed air nozzles are fixedly connected to the installation tube from top to bottom, and the compressed air nozzles and the compressed air main tube of the air compression station are connected through a pressure hose and a quick coupling. And opening the compressed air electric main valve during cleaning. Compressed air source parameters: air quantity is 500m3The compressed air pressure is required to be 0.2MPa (g), the flushing with clear water is not needed any more, the surplus compressed air in the plant is fully utilized, the water resource is saved, and the current situation that the outer wall of the equipment tube is corroded when the flushing is carried out with water is avoided.
Preferably, after the air outside the heat exchange tube nest and the ammonia gas heat exchange in the tube, the draught fan continuously exhausts the air, and the fan rotating speed is controlled by adjusting the frequency of the draught fan to control the back temperature of the ammonia gas mixed gas cooler in the tube.
Preferably, the temperature of ammonia vapor at the outlet of the ammonia still is 101-103 ℃, a mixture of ammonia vapor and ammonia water is formed after passing through the first section of air cooler, the temperature of the mixture cannot be too low, the condensed partial ammonia vapor is prevented from reacting with hydrogen sulfide to generate ammonium sulfate salt to block a pipeline, the rotating speed of a fan is adjusted and controlled through the frequency of the induced draft fan, the cooling air volume is indirectly controlled, the temperature of the ammonia vapor mixed air cooler is controlled, and the temperature is controlled at 93-96 ℃.
Preferably, the temperature of the ammonia gas separated by the gas-liquid separator is 93-96 ℃.
Preferably, ammonia water with the mass concentration of 15-20% is prepared after condensation by the two-stage air cooler, and the temperature is 40-45 ℃. The rotating speed of the draught fan is adjusted and controlled through the frequency of the draught fan, the cooling air quantity is indirectly controlled, the temperature of ammonia water is controlled, the temperature cannot be lower than 40 ℃, the condensed part of ammonia water is prevented from reacting with hydrogen sulfide to generate ammonium sulfate salt, condensation crystallization is prevented from blocking a pipeline, and the ammonia water with the mass concentration of 15% -20% is prepared.
Preferably, the ammonia water condensed by the secondary air cooler enters an HPF desulfurization solution reaction tank.
Preferably, the gas-liquid separator is also provided with an ammonia water outlet, the ammonia water outlet of the gas-liquid separator is communicated with the top of the ammonia still through an ammonia water reflux pump, and the temperature of the top of the ammonia still is controlled by adjusting the reflux quantity.
Compared with the prior art, the invention has the following beneficial effects:
the invention improves the ammonia vapor condensation cooling system of the traditional ammonia still, utilizes the renewable resource of nature air to replace the circulating cooling water of the open cooling tower to condense, cool and cool the high-temperature ammonia vapor produced by the ammonia still, can condense, cool and cool the 103-105 ℃ ammonia vapor (containing water vapor) evaporated from the ammonia still to 45-50 ℃, compared with the traditional process system which uses the circulating cooling water system of the open cooling tower, a dephlegmator and an ammonia vapor condensation cooler to condense, cool and cool the ammonia vapor, the invention has the following advantages:
(1) the power consumption is reduced because no circulating water pump is arranged;
(2) fresh water is not consumed any more by the system, the consumption of fresh water per ton of coke is reduced, and the energy consumption per unit procedure is better controlled to be below a unit product energy consumption allowance admission value of 122kgce/t coke of a newly built coke production device in the coke unit product energy consumption allowance (GB 21342-2013);
(3) the natural air is used as a cooling medium, so that the environment is protected;
(4) the system does not need to add a sterilization algicide and a scale and corrosion inhibitor (with corrosivity), does not have the phenomenon that the pipeline is scaled and needs frequent chemical cleaning, and prolongs the service life of equipment. The operation cost is reduced, the environment is protected, the safety is realized, the operation is simple, and no hazardous waste is generated;
the system for condensing and cooling the ammonia steam evaporated from the ammonia still by using the novel air cooler is revolutionary technical change and subversive innovation in the professional ammonia steam condensation and cooling of the ammonia still, has the advantages of energy conservation, environmental protection, safety and simple and convenient operation, belongs to clean and environment-friendly production, develops a more energy-saving, more environment-friendly, lower-cost, simpler and safer production process device, and has good optimization effect on various operation indexes of the ammonia still.
Drawings
FIG. 1 is an ammonia vapor condensing and cooling system (inside the outline) of a conventional ammonia still;
FIG. 2 is an ammonia vapor condensing and cooling system of an ammonia still utilizing an air cooler according to the present invention;
FIG. 3 is a schematic diagram of a specific structure of the primary air cooler or the secondary air cooler in FIG. 2;
description of reference numerals:
a. ammonia water enters an ammonia still, b, an ammonia dephlegmator, c, a gas-liquid separator, d, an ammonia vapor condensation cooler, e, a circulating cooling water pump, f, an open-circuit cooling tower circulating cooling water system, g, a circulating cooling water reservoir, h and a heat exchange system;
1. the device comprises a first-section air cooler, a second-section air cooler, a heat exchange tube array, a draught fan, a base frame, a compressed air nozzle and an installation tube, wherein the first-section air cooler is 2, the second-section air cooler is 3, the heat exchange tube array is 4, the draught fan is 5, the base frame is 51, and the installation tube is 52.
Detailed Description
In order to make the technical solutions of the present invention better understood and implemented by those skilled in the art, the present invention is further described below with reference to the following specific embodiments and the accompanying drawings, but the embodiments are not meant to limit the present invention. The experimental methods and the detection methods described in the following examples are all conventional methods unless otherwise specified; the reagents and materials are commercially available, unless otherwise specified.
As shown in figure 1, a 4-seat JNX2-70-2 type single-heat top-loading coke oven produces 280 ten thousand tons of coke annually, a gas purification device is matched with the top-loading coke oven and is implemented in two stages, and the gas treatment capacity (dry gas) is 77602Nm3H x2, industrial or civil use of purified coke oven gas, 100m produced per hour of the system3And (3) the residual ammonia water needs to be subjected to ammonia distillation treatment in an ammonia distillation tower a, 0.4-0.5 MPa of low-pressure steam at 160 ℃ is consumed, and 10t/h is consumed. 108m of produced qualified ammonia distillation wastewater (ammonia nitrogen is less than or equal to 150mg/L)3H, sending the sewage to a sewage treatment plant for purification treatment; 2m of produced 15 to 20 percent strong ammonia water3And/h for use in a HPF desulfurization unit. The traditional condensation cooling process is that ammonia water enters an ammonia still a, generated ammonia vapor enters an ammonia dephlegmator b, then is separated by a gas-liquid separator c, uncondensed ammonia vapor is condensed by an ammonia vapor condensation cooler d, the process adopts the open-circuit cooling tower to circulate cooling water, has large water consumption, needs to use medicaments to treat the circulating water, is easy to scale equipment and the like, in order to solve the problems, the invention provides an ammonia steam condensation cooling system of an ammonia still utilizing an air cooler, as shown in FIG. 2 (the process flow on the left side of the ammonia still a in FIG. 2 is the same as that in FIG. 1), comprising a first-stage air cooler 1, a gas-liquid separator c and a second-stage air cooler 2, one end of the first-section air cooler 1 is communicated with an ammonia gas outlet of an ammonia still a, the other end of the first-section air cooler is communicated with an inlet of the gas-liquid separator c, and an air outlet of the gas-liquid separator c is communicated with an air inlet of the second-section air cooler 2; after ammonia steam from the ammonia still a is condensed by the first-stage air cooler 1 and the second-stage air cooler 2, 15-20% ammonia water can be prepared, the water used by the condensation cooling system shown in figure 1 is replaced for circulating cooling, and water resources are savedThe power consumption has been reduced to the source, and the pipeline can not the scale deposit, need not carry out chemical cleaning, has improved the life of equipment, and does not have the useless production of danger, has also reduced the running cost, has reduced workman intensity of labour.
One section air cooler 1 with 2 structures of two-stage process air cooler are the same, all include two sets of heat transfer tubulation 3 and draught fan 4, and are two sets of heat transfer tubulation 3 become the V type and arrange, can not use the A type air cooling condenser of power plant, because prevent that the aqueous ammonia that the condensation got off is difficult to collect and gather the drainage and go out, and can block up the tubulation with hydrogen sulfide generation ammonium sulfate salt in the gas mixture, draught fan 4 sets up in the heat transfer tubulation 3 top of V type, and draught fan 4's blade material FRP, ammonia steam walk the tube side and with 3 outside of tubes air of heat transfer tubulation carry out indirect heat transfer. The cooling method comprises the following steps: the intraductal ammonia vapour that leads to of heat transfer tubulation 3, the contact of the outside of tubes and outside air, the air temperature outside the tubes is low, and the heat of ammonia vapour is absorbed by the air, and draught fan 4 constantly arranges the outside air of heat transfer tubulation 3 to the atmosphere in, reduces the temperature of near air outside the heat transfer tubulation 3 for the heat of ammonia vapour can continuously be absorbed, thereby has realized the refrigerated purpose of condensation. In addition, the rotating speed of the draught fan can be controlled by adjusting the frequency of the draught fan 4, and the air quantity is indirectly controlled, so that the temperature of the ammonia-steam mixed gas cooler in the pipe is controlled.
Because ammonia water has corrosivity, the pipeline can be corroded by long-time use, in order to prevent the problem, the invention uses an anticorrosive material to prepare the pipeline, in particular, the heat exchange tube array 3 can be made of a stainless steel composite plate of Dalianganmai equipment manufacturing company Limited and is made of a stainless steel composite plate which takes carbon steel as a base layer and stainless steel 316L as a coating layer, the base layer and the coating layer realize complete metallurgical bonding and are novel materials, the complementary advantages of the materials are fully realized, the corrosion resistance, the wear resistance, the diamagnetism and the decoration of 316L are realized, and the weldability, the formability, the ductility and the heat conductivity of the carbon steel are good, the application of the material can obviously improve the strength, the rigidity and the impact load strength, reduce the weight of structural parts, greatly reduce the cost while ensuring the technical requirements, and is a new generation of energy-saving and environment-friendly product. The outer diameter of the tube array is 25mm, the wall thickness is 3mm, the material of fins on the outer wall of the tube array is 1060Al, the height of the fins is 16mm, the thickness of the fins is 0.4m, the fin ratio is 23.4, the fin type DR is adopted, and the tube drainage is a 4-row 2 process. The head-on wind speed is 2.8 m/s. The number of the tube bundles is 24, and the number of the single-tube-bundle heat exchange tubes is 182.
The temperature of ammonia vapor at the outlet of the ammonia still a is 101-103 ℃, and after the ammonia vapor is treated by the first-section air cooler 1, a mixture of ammonia vapor and ammonia water is formed, and the temperature is 93-96 ℃. The rotating speed of the draught fan is adjusted and controlled through the frequency of the draught fan 4, the cooling air quantity is indirectly controlled, the temperature behind the ammonia-steam mixed gas cooler is controlled, the temperature cannot be too low, and the phenomenon that the ammonium sulfate salt generated by the reaction of part of the condensed ammonia steam and hydrogen sulfide blocks a pipeline is prevented. The temperature of ammonia gas separated by the gas-liquid separator c is 93-96 ℃, ammonia water with the mass concentration of 15% -20% is prepared after condensation of the two-stage air cooler 2, the temperature is 40-45 ℃, the rotating speed of a fan is controlled through frequency adjustment of the draught fan, the cooling air quantity is indirectly controlled, the temperature of the ammonia water is controlled, the temperature cannot be lower than 40 ℃, the condensed part of ammonia water is prevented from reacting with hydrogen sulfide to generate ammonium sulfate salt, the ammonium sulfate salt is condensed and crystallized to block a pipeline, the ammonia water with the mass concentration of 15% -20% is prepared, and the ammonia water condensed by the two-stage air cooler 2 enters an HPF desulfurization liquid reaction tank. The gas-liquid separator c is also provided with an ammonia water outlet, the ammonia water outlet of the gas-liquid separator c is communicated with the top of the ammonia still a through an ammonia water reflux pump, part of ammonia water is sent to the top of the ammonia still to reflux through the ammonia water reflux pump, and the temperature of the top of the ammonia still is adjusted and controlled through the reflux quantity.
As shown in fig. 3, the primary air cooler 1 and the secondary air cooler 2 are respectively provided with a set of low-pressure compressed air cleaning system, and the low-pressure compressed air cleaning system includes: chassis 5 and installation pipe 52, chassis 5 sets up the heat transfer tubulation 3 tops of V type, vertical rigid coupling has installation pipe 52 on the chassis 5, installation pipe 52 top-down evenly distributed has three compressed air nozzle 51, compressed air nozzle 51 is connected through pressure-resistant hose and quick-operation joint between the compressed air person in charge in compressed air nozzle and the air compression station, compressed air source parameter: air quantity is 500m3H, compressed air pressure requirement 0.2MPa (g); conventional processThe chemical cleaning of the circulating cooling water channels of the heat exchange tube arrays of the division condenser and the ammonia vapor condensation cooler is carried out regularly, equipment accidents such as internal leakage and the like of the division condenser and the ammonia vapor condensation cooler are caused by frequent cleaning, the service life of the equipment is reduced, and a large amount of chemical reagents are used in the process to cause pollution.
According to the invention, an air cooler is used on the ammonia steam cooling process of the ammonia still to replace a dephlegmator and an ammonia steam condensation cooler, the system does not consume fresh water any more, the consumption of fresh water per ton of coke is reduced, and the energy consumption of unit process is better controlled below the unit product energy consumption allowance admittance value of 122kgce/t coke of a newly-built coke production device in the coke unit product energy consumption allowance (GB 21342-2013). The air of nature is used as cooling medium, so that the environment is protected. The system does not need to add a sterilization algicide and a scale and corrosion inhibitor (with corrosivity), does not have the phenomenon that the pipeline is scaled and needs frequent chemical cleaning, and prolongs the service life of equipment. The method has the advantages of low operation cost, environmental protection, safety, simple operation and no generation of hazardous wastes. The ammonia still ammonia condensing and cooling device is revolutionary technical change and subversive innovation in the aspect of ammonia condensing and cooling specialty, has the advantages of energy saving, environmental protection, safety and simple and convenient operation, belongs to clean and environment-friendly production, develops a production process device with more energy saving, more environmental protection, lower cost, simpler and safer operation, and has good optimization effect on all operation indexes of the ammonia still.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, it is intended that such changes and modifications be included within the scope of the appended claims and their equivalents.
Claims (9)
1. The ammonia tower ammonia vapor condensation cooling system utilizing the air cooler is characterized by comprising a first-section air cooler (1), a gas-liquid separator (c) and a second-section air cooler (2), wherein one end of the first-section air cooler (1) is communicated with an ammonia vapor outlet of an ammonia still (a), the other end of the first-section air cooler is communicated with an inlet of the gas-liquid separator (c), and an air outlet of the gas-liquid separator (c) is communicated with an air inlet of the second-section air cooler (2);
one section air cooler (1) with two-section air cooler (2) structure is the same, all includes two sets of heat transfer tubulation (3) and draught fan (4), and is two sets of heat transfer tubulation (3) become the V type and arrange, draught fan (4) set up in the heat transfer tubulation (3) top of V type, ammonia steam walk the tube side and with the air of heat transfer tubulation (3) outside of the tubes carries out indirect heat transfer.
2. The ammonia still ammonia steam condensation cooling system using air cooler as claimed in claim 1, wherein said heat exchange tubes (3) are tubes composed of base layer and coating layer, said base layer is made of carbon steel, said coating layer is made of 316L, said heat exchange tubes (3) are provided with fins on their outer wall, said fins are made of 1060 Al.
3. The ammonia still ammonia steam condensation cooling system using air cooler as claimed in claim 1, wherein said primary air cooler (1) and said secondary air cooler (2) are respectively equipped with a set of low pressure compressed air cleaning system, said low pressure compressed air cleaning system comprising: chassis (5) and installation pipe (52), chassis (5) set up the heat transfer tubulation (3) top of V type, vertical rigid coupling has installation pipe (52) on chassis (5), installation pipe (52) top-down evenly distributed has three compressed air nozzle (51), compressed air nozzle (51) and air compression station's compressed air are responsible for between and are connected through pressure-resistant hose and quick-operation joint.
4. The ammonia still ammonia steam condensation cooling system using the air cooler as claimed in claim 1, wherein the air outside the heat exchange tubes (3) is continuously exhausted to the atmosphere through the induced draft fan (4) after heat exchange with the ammonia steam in the tubes, and the temperature of the ammonia-steam mixed gas cooler in the tubes is controlled by adjusting the frequency of the induced draft fan (4) to control the rotating speed of the fan.
5. The ammonia steam condensation cooling system of the ammonia still utilizing the air cooler as claimed in claim 1, wherein the temperature of the ammonia steam at the outlet of the ammonia still (a) is 101-103 ℃, and after the ammonia steam is condensed by the primary air cooler (1), a mixture of the ammonia steam and the ammonia water is formed, and the temperature is 93-96 ℃.
6. The ammonia vapor condensation cooling system of the ammonia still using the air cooler as claimed in claim 1, wherein the temperature of the ammonia vapor separated by the gas-liquid separator (c) is 93-96 ℃.
7. The ammonia steam condensation cooling system of the ammonia still utilizing the air cooler as claimed in claim 1, wherein the ammonia water with mass concentration of 15-20% is prepared after the condensation of the two-stage air cooler (2), and the temperature is 40-45 ℃.
8. The ammonia steam condensation cooling system of the ammonia still utilizing the air cooler as claimed in claim 1, wherein the ammonia water condensed by the secondary air cooler (2) enters the HPF desulfurization solution reaction tank.
9. The ammonia still ammonia vapor condensation cooling system using air cooler as claimed in claim 1, wherein the gas-liquid separator (c) is further provided with an ammonia water outlet, the ammonia water outlet of the gas-liquid separator (c) is communicated with the top of the ammonia still (a) through an ammonia water reflux pump, and the temperature of the top of the ammonia still (a) is controlled by adjusting the reflux amount.
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| CN210486160U (en) * | 2019-03-22 | 2020-05-08 | 川屹节能科技（上海）有限公司 | Combined cooling system for ammonia absorption refrigerator |
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