CN203700298U - Waste heat recovery and utilization system used for semi-water gas of ammonia synthesis - Google Patents
Waste heat recovery and utilization system used for semi-water gas of ammonia synthesis Download PDFInfo
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- CN203700298U CN203700298U CN201420036643.7U CN201420036643U CN203700298U CN 203700298 U CN203700298 U CN 203700298U CN 201420036643 U CN201420036643 U CN 201420036643U CN 203700298 U CN203700298 U CN 203700298U
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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
- 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
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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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
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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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
- Y02P20/129—Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines
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Abstract
The utility model provides a waste heat recovery and utilization system used for semi-water gas of ammonia synthesis. The semi-water gas generated in a gas furnace sequentially passes through a waste heat boiler, a scrubber tower, a desulfurization tower, and a compressor, and then enters a synthesis tower for synthesis; the gas outlet end of the waste heat boiler is connected with the scrubber tower through a heat exchanger; a graphite heat exchanger is arranged between the desulfurization tower and the compressor. According to the semi-water gas waste heat recovery and utilization system, the temperature of the semi-water gas is lowered through a water flowing layer heat exchanger; the recovered heat can generate hot water to push a lithium bromide unit to prepare cooling water to supply the graphite heat exchanger to cool the semi-water gas at the inlet of the compressor, effective recovery and utilization of the waste heat is realized, the efficiency of the compressor is increased, and the production of ammonia synthesis is increased.
Description
Technical field
The utility model relates to heat recovery technical field, is specifically related to a kind of waste heat recycling system for the synthesis of ammonia semi-water gas.
Background technology
Synthetic ammonia industry, fertilizer industry and Coal Chemical Industry industry all relate to synthetic ammonia related process, ammonia synthesis process comprises several steps such as gasification, desulfurization, compression and ammonia synthesis, wherein gasification exactly solid fuel is vaporized into lead in scrubber tower after semi-water gas wash, cooling.Because the temperature of semi-water gas is higher, and be wherein contained in a large amount of solid particulates, easily general interchanger is stopped up, so conventional waste heat boiler carries out heat exchange processing at present, but its cooling-down effect is not obvious, is 150 DEG C-180 DEG C from waste heat boiler semi-water gas temperature out, and contain a large amount of water vapour, these semi-water gass enter after scrubber tower, need to carry out this water vapor of condensation by a large amount of water, and coal gas is lowered the temperature.In scrubber tower, the heat of semi-water gas is taken away by gas washing water, causes energy wastage; Drop into again on the other hand large number quipments and operation cost and carry out cooling gas washing water, so just formed the repetition and waste of the energy.
In addition, the semi-water gas temperature of the inlet mouth of compression section is higher, especially reaches summer more than 40 DEG C, thereby affects compressor efficiency.By calculating, 1 DEG C of the every reduction of semi-water gas temperature, the efficiency of compressor just increases by 0.32%.Reduce semi-water gas temperature so set up an interchanger at the inlet mouth of compression section, thereby reach the efficiency that improves compressor.
Utility model content
In order to address the above problem, the utility model provides a kind of waste heat recycling system for the synthesis of ammonia semi-water gas, according to the feature of semi-water gas and synthetic ammonia compressor, effectively reclaim the waste heat of semi-water gas, and utilize the semi-water gas of the inlet mouth of this waste heat to compression section to lower the temperature, reach the object that reduces energy consumption, improves output.
In order to achieve the above object, the utility model provides a kind of waste heat recycling system for the synthesis of ammonia semi-water gas, the semi-water gas that gas furnace produces is successively by entering in synthetic tower and synthesize after waste heat boiler, scrubber tower, thionizer, compressor, and the outlet side of described waste heat boiler is connected with scrubber tower by interchanger; Between described thionizer and compressor, be provided with graphite heat exchanger.
Further, in order to make full use of the exchanging heat of water flow layer interchanger, the feed-water end of described graphite heat exchanger is connected with the cooling water outlet end of lithiumbromide unit, the heat source water of described lithiumbromide unit into and out of end go out with the water coolant of described interchanger respectively, inlet side is connected to form a circulation.
Further, large and cause dust stratification serious for fear of dust in semi-water gas, and cause the not high problem of heat exchange efficiency of tubular heat exchanger, the utility model adopts water flow layer interchanger, described water flow layer interchanger comprises heat transfer tube, the inlet end of heat transfer tube is arranged with the shaped as frame tank being connected with heat transfer tube vertical seal, and its top passes tank and is positioned at above tank; The heat transfer tube sidewall that is positioned at tank inside is provided with prosopyle.
In order to make the water entering in heat transfer tube by prosopyle form equally distributed moisture film at heat transfer tube inwall, on the top tube wall of described heat transfer tube, be arranged with cross section and become point water cap of N-shaped, and divide the inside length of water cap to be not less than the height of described tank.
So the utlity model has following beneficial effect:
1, the utility model is established a water flow layer interchanger between waste heat boiler and scrubber tower, by through the further heat exchange cooling of the cooling semi-water gas of waste heat boiler, makes to reduce to 90 DEG C of left and right from the temperature of interchanger semi-water gas out; Thereby it is cooling that minimizing is carried out semi-water gas in scrubber tower, reduce cost.
2, between thionizer and compressor, graphite heat exchanger is set, the temperature of the semi-water gas after desulfurization is further lowered the temperature, be down to 20 DEG C of left and right, thereby greatly improve the working efficiency of compressor simultaneously.
3, graphite heat exchanger water coolant is provided by lithiumbromide unit, and the heat source water of lithiumbromide unit into and out of end go out with the water coolant of water flow layer interchanger respectively, inlet side is connected to form a circulation; Make after water coolant heat absorption, to offer lithiumbromide unit in water flow layer interchanger and freeze as heat source water, take full advantage of heat circulation, energy-saving and cost-reducing.
4, because the coefficient of heat transfer of semi-water gas and water is larger, and the coefficient of heat transfer of water and carbon steel is larger, so the heat exchange efficiency of the water flow layer interchanger that the utility model adopts is high tens times, traditional tubular heat exchanger is that direct semi-water gas and carbon steel are carried out to heat exchange, and its efficiency is low.
5, the top of the heat transfer tube in water flow layer interchanger is provided with a point water cap, makes the water in tank form the mobile moisture film of equally distributed one deck at the inwall of heat transfer tube, makes the transmission of heat more even; And mobile moisture film is flushed to its bottom by the dust that enters heat transfer tube inside and collects, and is finally taken out of by flowing water, avoids heat transfer tube laying dust and obstruction; Solve its dew point corrosion problem simultaneously, increased the work-ing life of heat transfer tube and interchanger.
Brief description of the drawings
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.
Fig. 1 is the utility model structural representation;
Fig. 2 is the water flow layer heat exchanger structure schematic diagram in the utility model;
In figure: 1-gas furnace, 2-waste heat boiler, 3-water flow layer interchanger, 3-1-heat transfer tube, 3-2-tank, 3-3-divides water cap, 4-scrubber tower, 5-thionizer, 6-graphite heat exchanger, 7-compressor, 8-lithiumbromide unit.
Embodiment
As shown in Figure 1, a kind of waste heat recycling system for the synthesis of ammonia semi-water gas, between thionizer 5 and compressor 7, be provided with graphite heat exchanger 6, the feed-water end of graphite heat exchanger 6 is connected with the cooling water outlet end of lithiumbromide unit 8, the heat source water of described lithiumbromide unit 8 into and out of end go out with the water coolant of water flow layer interchanger 3 respectively, inlet side is connected to form a circulation.
The semi-water gas that gas furnace 1 produces is successively by entering in synthetic tower and synthesize after waste heat boiler 2, water flow layer interchanger 3, scrubber tower 4, thionizer 5, graphite heat exchanger 6, compressor 7.Its temperature control is as described below:
Gas furnace 1 makes the semi-water gas of 300 DEG C of left and right high temperature, and after waste heat boiler 2 reclaims a part of heat, temperature is reduced to 150 DEG C of left and right; Then in the moving layer of ingoing stream interchanger 3, carry out heat exchange, its temperature is reduced to 90 DEG C of left and right and is entered in scrubber tower 4, reduce to 40 DEG C of left and right by a small amount of recirculated water washing, cooling rear temperature, then in thionizer 5, carry out desulfurization through going after roots blower pressurization, semi-water gas temperature after desulfurization is 40 DEG C of left and right, finally enters in graphite heat exchanger 6, after dark cooling temperature is reduced to 20 DEG C of left and right, to enter compressor 7 and compress.
In the moving layer of the thermal source water outlet ingoing stream of 75 DEG C of left and right of lithiumbromide unit 8 interchanger 3, carry out heat exchange simultaneously, make its temperature be elevated to 95 DEG C of left and right; The heat source water of 95 DEG C is got back to lithiumbromide unit 8 for the production of the cold water of 7 DEG C as thermal source, and this cold water of 7 DEG C is lowered the temperature to semi-water gas as the water coolant of graphite heat exchanger, and after heat exchange, temperature rises to 12 DEG C, then returns lithiumbromide unit and be cooled and recycle.The heat source water of 95 DEG C is dropped to 75 DEG C of left and right by the rear temperature of lithium bromide water solution heat absorption simultaneously, and then the heated recycle of backwater fluidised bed interchanger 3.
As shown in Figure 2, water flow layer interchanger 3 comprises heat transfer tube 3-1, and the inlet end of heat transfer tube 3-1 is arranged with the shaped as frame tank 3-2 being connected with heat transfer tube vertical seal, and its top passes tank and is positioned at above tank 3-2; The heat transfer tube 3-1 sidewall that is positioned at tank inside is provided with multiple prosopyles.On the top tube wall of heat transfer tube 3-1, be arranged with point water cap 3-3 that cross section becomes N-shaped, and the inside length of point water cap 3-3 is not less than the height of tank 3-2.
The inner tube that recirculated water in tank 3-2 enters heat transfer tube 3-1 by being located at the prosopyle of heat transfer tube 3-1 upper portion side wall, and by point water cap 3-3 that is set in heat transfer tube 3-1 top, the water entering in heat transfer tube 3-1 is evenly distributed on to the mobile moisture film of its inwall formation one deck.The semi-water gas heat that enters the high temperature in heat transfer tube 3-1 is passed to rapidly to the mobile moisture film of heat transfer tube 3-1 inwall, mobile moisture film is delivered to heat the outer wall of heat transfer tube 3-1 again, improve its heat exchange efficiency, and avoided dust to pile up and wearing and tearing or obstruction at heat transfer tube 3-1 inwall.
Above embodiment is not limited only to this semi-water gas waste heat recovery utilization system protection domain, all modify based on present method thought or change all belong to protection domain of the present utility model.
Claims (4)
1. the waste heat recycling system for the synthesis of ammonia semi-water gas, the semi-water gas that gas furnace produces, successively by entering in synthetic tower and synthesize after waste heat boiler, scrubber tower, thionizer, compressor, is characterized in that: the outlet side of described waste heat boiler is connected with scrubber tower by interchanger; Between described thionizer and compressor, be provided with graphite heat exchanger.
2. the waste heat recycling system for the synthesis of ammonia semi-water gas according to claim 1, it is characterized in that: the feed-water end of described graphite heat exchanger is connected with the cooling water outlet end of lithiumbromide unit, the heat source water of described lithiumbromide unit into and out of end go out with the water coolant of described interchanger respectively, inlet side is connected to form a circulation.
3. the waste heat recycling system for the synthesis of ammonia semi-water gas according to claim 1 and 2, it is characterized in that: described interchanger is water flow layer interchanger, described water flow layer interchanger comprises heat transfer tube, the inlet end of heat transfer tube is arranged with the shaped as frame tank being connected with heat transfer tube vertical seal, and its top passes tank and is positioned at above tank; The heat transfer tube sidewall that is positioned at tank inside is provided with prosopyle.
4. the waste heat recycling system for the synthesis of ammonia semi-water gas according to claim 3, is characterized in that: on the top tube wall of described heat transfer tube, be arranged with point water cap of cross section one-tenth N-shaped, the inside length of point water cap is not less than the height of described tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420036643.7U CN203700298U (en) | 2014-01-21 | 2014-01-21 | Waste heat recovery and utilization system used for semi-water gas of ammonia synthesis |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420036643.7U CN203700298U (en) | 2014-01-21 | 2014-01-21 | Waste heat recovery and utilization system used for semi-water gas of ammonia synthesis |
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| Publication Number | Publication Date |
|---|---|
| CN203700298U true CN203700298U (en) | 2014-07-09 |
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| CN201420036643.7U Expired - Fee Related CN203700298U (en) | 2014-01-21 | 2014-01-21 | Waste heat recovery and utilization system used for semi-water gas of ammonia synthesis |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104876241A (en) * | 2015-05-26 | 2015-09-02 | 安徽瀚洋节能科技有限公司 | Semi-water gas waste heat recycling system used for ammonia synthesis |
| CN105112107A (en) * | 2014-12-02 | 2015-12-02 | 芜湖三峰节能设备有限公司 | Waste heat recovery and utilization system for semi-water gas in ammonia synthesizing process |
-
2014
- 2014-01-21 CN CN201420036643.7U patent/CN203700298U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105112107A (en) * | 2014-12-02 | 2015-12-02 | 芜湖三峰节能设备有限公司 | Waste heat recovery and utilization system for semi-water gas in ammonia synthesizing process |
| CN104876241A (en) * | 2015-05-26 | 2015-09-02 | 安徽瀚洋节能科技有限公司 | Semi-water gas waste heat recycling system used for ammonia synthesis |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP03 | Change of name, title or address |
Address after: 230000 D monomer 2D6 room, workshop D-6D-11, science and Technology Industrial Park, 168 camphor Road, hi tech Zone, Anhui, Hefei Patentee after: ANHUI RESOURCE SAVING & ENVIRONMENTAL TECHNOLOGY CO., LTD. Address before: Bao road in Yaohai District of Hefei city in Anhui province 230000 No. 1 Yaohai city science and Technology Industrial Park Patentee before: Anhui Section Source of Energy-Saving Technology Co., Ltd. |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140709 Termination date: 20200121 |
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| CF01 | Termination of patent right due to non-payment of annual fee |