CN103697620A - Waste heat refrigeration method and device of urea high pressure temperature regulation water - Google Patents
Waste heat refrigeration method and device of urea high pressure temperature regulation water Download PDFInfo
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- CN103697620A CN103697620A CN201310725530.8A CN201310725530A CN103697620A CN 103697620 A CN103697620 A CN 103697620A CN 201310725530 A CN201310725530 A CN 201310725530A CN 103697620 A CN103697620 A CN 103697620A
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Abstract
The invention relates to a waste heat refrigeration method and device of urea high pressure temperature regulation water. The outlet end of the high pressure temperature regulation water of a high pressure scrubber is connected with a main route and a bypass; the bypass is connected with the heat source inlet of a lithium bromide refrigeration unit; the heat source outlet of the lithium bromide refrigeration unit is connected with the main route. The waste heat refrigeration method includes that the high pressure temperature regulation water is utilized as a heat source of the lithium bromide refrigeration unit, wherein the temperature of the high pressure temperature regulation water is 128 to 132 DEG C when out of the high pressure scrubber; heat exchange is performed on the high pressure temperature regulation water in the lithium bromide refrigeration unit; the high pressure temperature regulation water returns back to the high pressure scrubber when the temperature of the high pressure temperature regulation water out of the lithium bromide refrigeration unit decreases to 110 DEG C. According to the waste heat refrigeration method and device of the urea high pressure temperature regulation water, the heat of the high pressure scrubber can be recycled and accordingly the purposes of energy conservation and emission reduction can be achieved.
Description
Technical field
The present invention relates to the recycling of the high water transfer waste heat of urea in nitrogen fertilizer production.
Background technology
The factor that affects output in summer in Ammonia Production is mainly that each section of inlet temperature of nitrogen-hydrogen compressor is high, causes compressor gas mass flow not enough.Reduce the gas mass flow that one section of inlet temperature of compressor can be removed the water capacity of one section of inlet gas and be improved compressor.Decarbonizing section adopts NHD decarbonization process, and summer, conversion gas temperature was higher, causes ice maker load excessive, and the moisture of simultaneously bringing decarbonization system into is more, affects loss and workshop section's energy consumption of decarbonizing section NHD solution.
Nitrogen fertilizer production industry has been done more work in the energy-saving and emission-reduction such as water saving, UTILIZATION OF VESIDUAL HEAT IN, waste gas recovery, water reuse, reduction waste residue remaining carbon.Wherein, lithium bromide refrigerating technology is exactly a good power-saving technology of application.Take Shanxi orchid Coal Chemical Industry Co., Ltd is example, and company's synthetic ammonia yearly productive capacity is 200,000 tons/year, existing urea production system, and urea production ability is 300,000 tons/year.In urea production process, produce a large amount of low-grade hot water, these waste heats will cause very large waste if not being used.At present, in urea production process, utilize high water transfer to take away the heat that the first ammonium absorption condensation in high pressure scrubber produces, flow and temperature by high water transfer regulate the temperature of controlling high pressure scrubber operation, by cooling water, be dispersed into atmospheric environment again, existing technological operation index is: the flow 220m of high water transfer
3/ h ~ 250m
3/ h, enters 110 ℃ of left and right of temperature of high pressure scrubber, goes out 130 ℃ of left and right of temperature of high pressure scrubber, goes to return high pressure scrubber circulation after the cooling of demineralized water cooler after circulating pump pressurization.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of urea high water transfer utilizing waste heat for refrigeration method and device of heat of recoverable high pressure scrubber.
For solving above technical problem, the high water transfer utilizing waste heat for refrigeration of a kind of urea of the present invention method, by the temperature that goes out high pressure scrubber, be that the high water transfer of 128 ℃-132 ℃ is as the thermal source of lithium bromide refrigerating unit, high water transfer is in the heat exchange of lithium bromide refrigerating unit, and the lofty tone coolant-temperature gage that goes out lithium bromide refrigerating unit is down to 110 ℃ and is returned to high pressure scrubber again.
For realizing above-mentioned method, the high water transfer heat refrigeration apparatus of a kind of urea of the present invention, in high pressure scrubber water out end connection main road and bypass to a high-profile, wherein, bypass connects the thermal source entrance of lithium bromide refrigerating unit, lithium bromide refrigerating unit thermal source outlet is connected to main road, and main road connects water pump to a high-profile, goes out the lofty tone water inlet that is connected to high pressure scrubber after water pump to a high-profile.
Design of the present invention is to utilize out the high water transfer of high pressure scrubber to make the thermal source of lithium bromide refrigerating unit.Lithium bromide refrigerating unit be take water as cold-producing medium, and lithium-bromide solution is absorbent, produces the chilled water of 6 ℃ of left and right, for the production of technical process.High water transfer is cooling after lithium bromide refrigerating unit, then enters high pressure scrubber and recycle.
As preferred technical scheme, the present invention also comprises an elevated tank, and elevated tank connects water chiller to a high-profile.
Compared with prior art, the present invention is by the high water transfer waste heat recovery of urea, with the first ammonium absorption condensation of high pressure scrubber, produces 4,300,000 kilocalories/up to 4,600,000 kilocalories/time heat Calculation, utilize 200m
3the high water transfer of/h, 130 ℃ of left and right, after heat exchange, recovered temperature is reduced to 110 ℃, can effectively utilize the waste heat in 4,000,000 kilocalories/time.
Secondly, the present invention utilizes the urea waste heat that grade is lower to adopt absorption refrigeration generation low-temperature cold water cooling compressor one to enter gas, can realize volume increase consumption reduction, reaches energy-saving and emission-reduction; The cooling conversion gas of low-temperature cold water that utilizes urea Technique of Utilizing Waste Heat For Refrigeration to produce, can realize energy-saving and cost-reducing; The cooling low-temperature cold water that utilizes urea Technique of Utilizing Waste Heat For Refrigeration to produce of the synthesis gas degree of depth is cooling to the further degree of depth of synthesis gas, can reduce ice maker load, reduces circulator gasinlet temperature, improves circulator inflate quantity, can realize the energy-saving and cost-reducing object of synthesis technique.
Accompanying drawing explanation
Fig. 1 is connection diagram of the present invention.
In figure, 1-lithium bromide refrigerating unit, 2-high pressure scrubber, 3-main road, 4-bypass, 5-is water pump to a high-profile, and 6-is water cooler to a high-profile, 7-elevated tank.
The specific embodiment
In order to make those skilled in the art better understand the present invention, below in conjunction with accompanying drawing, the present invention is done to further clear, complete explanation.
The high water transfer utilizing waste heat for refrigeration of a kind of urea of the present invention method, by the temperature that goes out high pressure scrubber 2, be that the high water transfer of 128 ℃-132 ℃ is as the thermal source of lithium bromide refrigerating unit 1, high water transfer is in 1 heat exchange of lithium bromide refrigerating unit, and the lofty tone coolant-temperature gage that goes out lithium bromide refrigerating unit 1 is down to 110 ℃ and is returned to high pressure scrubber 2 again.
The high water transfer heat refrigeration apparatus of urea of the present invention, in high pressure scrubber 2 water out end connection main road 3 and bypass 4 to a high-profile, shunting place in main road 3 and bypass 4 is provided with flow control valve, wherein, bypass 4 connects the thermal source entrance of lithium bromide refrigerating unit 1, the 1 thermal source outlet of lithium bromide refrigerating unit is connected to main road 3, main road 3 connects water pump 5 to a high-profile, go out to a high-profile and be divided into two-way after water pump 5, one tunnel is connected directly to the lofty tone water inlet of high pressure scrubber 2, is connected to the lofty tone water inlet of high pressure scrubber 2 after another road connection lofty tone water cooler.
During lithium bromide refrigerating unit 1 underload, utilize flow control valve to reduce the flow of bypass, recycling to a high-profile water cooler is controlled high pressure scrubber inflow temperature.
When lithium-bromide absorption-type refrigerating machine group 1 high load capacity, go out the high water transfer return water temperature of lithium bromide refrigerating unit 1 lower than 110 ℃, utilize flow control valve to increase hot water bypass flow.
According to urea production situation, in conjunction with refrigeration requirement, consider unit efficiency, if select 1 one of lithium bromide refrigerating units about 3,000,000 kilocalories/time, recyclable 4,000,000 kilocalories/up to 4,200,000 kilocalories/time heat.
Further, the present invention also comprises an elevated tank 7, and elevated tank 7 connects water chiller to a high-profile.In elevated tank 7, desalted water is housed, when lithium bromide refrigerator 1 breaks down, supplements the high water transfer that enters high pressure scrubber 2.
The scope of protection of present invention is not limited to the above specific embodiment; to those skilled in the art; the present invention can have various deformation and change, all any modifications of doing within design of the present invention and principle, improves and is equal within replacement all should be included in protection scope of the present invention.
Claims (3)
1. the high water transfer utilizing waste heat for refrigeration of a urea method, it is characterized in that: by the temperature that goes out high pressure scrubber (2), be that the high water transfer of 128 ℃-132 ℃ is as the thermal source of lithium bromide refrigerating unit (1), high water transfer is in lithium bromide refrigerating unit (1) heat exchange, and the lofty tone coolant-temperature gage that goes out lithium bromide refrigerating unit (1) is down to 110 ℃ and is returned to high pressure scrubber (2) again.
2. the high water transfer heat refrigeration apparatus of urea, it is characterized in that: high pressure scrubber (2) to a high-profile water out end connects main road (3) and bypass (4), wherein, bypass (4) connects the thermal source entrance of lithium bromide refrigerating unit (1), the outlet of lithium bromide refrigerating unit (1) thermal source is connected to main road (3), main road (3) connects water pump (5) to a high-profile, goes out the lofty tone water inlet that is connected to high pressure scrubber (2) after water pump (5) to a high-profile.
3. the high water transfer heat refrigeration apparatus of urea according to claim 2, is characterized in that: also comprise an elevated tank (7), elevated tank (7) connects water chiller to a high-profile.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310725530.8A CN103697620A (en) | 2013-12-25 | 2013-12-25 | Waste heat refrigeration method and device of urea high pressure temperature regulation water |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310725530.8A CN103697620A (en) | 2013-12-25 | 2013-12-25 | Waste heat refrigeration method and device of urea high pressure temperature regulation water |
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| Publication Number | Publication Date |
|---|---|
| CN103697620A true CN103697620A (en) | 2014-04-02 |
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ID=50359236
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310725530.8A Pending CN103697620A (en) | 2013-12-25 | 2013-12-25 | Waste heat refrigeration method and device of urea high pressure temperature regulation water |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104085900A (en) * | 2014-06-23 | 2014-10-08 | 山东晋煤明水化工集团有限公司 | Method for cooling synthetic ammonia by using urea work section high-pressure temperature-regulation water waste heat |
| CN113654270A (en) * | 2021-08-18 | 2021-11-16 | 山东联盟化工股份有限公司 | Efficient urea hot water waste heat recovery process |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101504224A (en) * | 2009-03-16 | 2009-08-12 | 浙江工商大学 | Solar energy and engine exhaust heat dual-power refrigeration air conditioner for vehicle |
| CN101871700A (en) * | 2009-04-22 | 2010-10-27 | 钱伟民 | Double source parallel step type heat pump hot water air-conditioning system |
| CN203083196U (en) * | 2012-12-18 | 2013-07-24 | 河北科技大学 | Device for producing low-temperature water by means of urea waste heat |
| CN103292513A (en) * | 2013-05-03 | 2013-09-11 | 上海交通大学 | Solar energy driven single-effect and double-effect coupled lithium bromide refrigerator |
| CN103418211A (en) * | 2013-08-23 | 2013-12-04 | 湖北宜化化工股份有限公司 | Process and device for heat utilization of high-pressure temperature-regulation water in shell side of high pressure scrubber in production in urea steam stripping method |
-
2013
- 2013-12-25 CN CN201310725530.8A patent/CN103697620A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101504224A (en) * | 2009-03-16 | 2009-08-12 | 浙江工商大学 | Solar energy and engine exhaust heat dual-power refrigeration air conditioner for vehicle |
| CN101871700A (en) * | 2009-04-22 | 2010-10-27 | 钱伟民 | Double source parallel step type heat pump hot water air-conditioning system |
| CN203083196U (en) * | 2012-12-18 | 2013-07-24 | 河北科技大学 | Device for producing low-temperature water by means of urea waste heat |
| CN103292513A (en) * | 2013-05-03 | 2013-09-11 | 上海交通大学 | Solar energy driven single-effect and double-effect coupled lithium bromide refrigerator |
| CN103418211A (en) * | 2013-08-23 | 2013-12-04 | 湖北宜化化工股份有限公司 | Process and device for heat utilization of high-pressure temperature-regulation water in shell side of high pressure scrubber in production in urea steam stripping method |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104085900A (en) * | 2014-06-23 | 2014-10-08 | 山东晋煤明水化工集团有限公司 | Method for cooling synthetic ammonia by using urea work section high-pressure temperature-regulation water waste heat |
| CN113654270A (en) * | 2021-08-18 | 2021-11-16 | 山东联盟化工股份有限公司 | Efficient urea hot water waste heat recovery process |
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Application publication date: 20140402 |
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