CN204569809U - Flue gases of cock oven residual heat using device - Google Patents
Flue gases of cock oven residual heat using device Download PDFInfo
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- CN204569809U CN204569809U CN201520224583.6U CN201520224583U CN204569809U CN 204569809 U CN204569809 U CN 204569809U CN 201520224583 U CN201520224583 U CN 201520224583U CN 204569809 U CN204569809 U CN 204569809U
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- reboiler
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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
A kind of flue gases of cock oven residual heat using device, arranges flue multiple line on coke oven underground flue side, and flue multiple line is installed gas approach valve, fume afterheat combination heat-exchanger rig, smoke induced draught fan and exhanst gas outlet valve; Described fume afterheat combination heat-exchanger rig comprises drum, reboiler, vaporizer and economizer, and described reboiler is arranged in drum, and is fixed on drum outer wall; The water-in of described reboiler is connected with ammonia circulation pump outlet by pipeline, and the import of ammonia circulation pump is connected with the cold water pipe of ammonia still, and the water outlet of reboiler is connected with the hot-water line of ammonia still; Vapour outlet on described drum connects steam outer net.The utility model can utilize fume afterheat heating from the recycling waste water of ammonia still, can also produce low-pressure saturated steam.
Description
Technical field:
The utility model belongs to field of Environment Protection, particularly a kind of flue gases of cock oven residual heat using device.
Background technology:
In coking production and gas purification process, contain a large amount of residual heat resources, have and recycle value greatly, coke oven flue waste gas heat accounts for 17%, coke oven flue tolerance is larger, according to the type of furnace, hole count, the combustion medium difference of coke oven, exhaust gas volumn is generally several ten thousand to about 300,000, and temperature is between 230--300 DEG C, domestic have Some Enterprises to utilize hot pipe technique direct production steam, its advantage is: 1. fume afterheat direct steam generation, a heat exchange, and heat exchange efficiency is high; Can by flue gas heat efficient recovery, the rate of recovery reaches 40-50%.2. water side is through water that is softening and deoxygenation, and water side is not corroded, and flue gas is surveyed and adopted heat pipe heat exchanging technology, solves low-temperature dew point corrosion problem.Shortcoming is: 1. produce after steam, then carry out ammonia still process, increases (with steam condensate equivalent) processing costs of waste water and the environmental protection pressure of discharge of wastewater.2. have the converting heat of 15% to become hot water in steam, do not participate in ammonia still process, steam heat utilization ratio is low, causes overall thermal utilization ratio low.
Patent network discloses the utility model patent of the patent No. 201210079169.1, the equipment of the method use of this patent utilization flue gases of cock oven waste heat ammonia still process, described flue gas waste heat recovery equipment comprises heat smoke and draws and low-temperature flue gas recovery discharge equipment, gas-liquid heat-exchange, tower reactor wastewater circulation device.Another publication 201110372553.6, provides one and effectively utilizes flue gases of cock oven waste heat, reduces the method and apparatus of wastewater discharge in ammonia still process process simultaneously; The advantage of these two patents is flue gas and recycling waste water direct heat exchange, a heat exchange, and heat exchange efficiency is high, reduces the wastewater treatment expense of the waste water increase that steam ammonia still process brings simultaneously; Shortcoming is: 1. deposed ammonia directly and smoke contacts, and pipe is outer forms dew point corrosion, and waste water vaporization in pipe, in vaporizer, there is ammonia Existential Space, ammonia causes wall erosion, and the interchanger life-span is extremely low, unless selected expensive alloy material.2. as ammonia still process thermal source, the heat of about 25-30% in flue gas, is only had effectively to utilize, other heats or directly discharge.
Summary of the invention
The purpose of this utility model is just to overcome above-mentioned the deficiencies in the prior art, and a kind of flue gases of cock oven residual heat using device is provided, first this device meets the object that heating cycle waste water realizes ammonia still process, residue available energy can be changed into steam again grid-connected simultaneously.
For achieving the above object, the utility model is achieved through the following technical solutions: a kind of flue gases of cock oven residual heat using device, it is characterized in that: flue multiple line is set on coke oven underground flue side, flue multiple line is installed gas approach valve, fume afterheat combination heat-exchanger rig, smoke induced draught fan and exhanst gas outlet valve; Described fume afterheat combination heat-exchanger rig comprises drum, reboiler, vaporizer and economizer, and described reboiler is arranged in drum, and is fixed on drum outer wall; The water-in of described reboiler is connected with ammonia circulation pump outlet by pipeline, and the import of ammonia circulation pump is connected with the cold water pipe of ammonia still, and the water outlet of reboiler is connected with the hot-water line of ammonia still; Vapour outlet on described drum connects steam outer net.
Above-mentioned flue multiple line and underground flue be arranged in parallel.
Above-mentioned vaporizer and economizer adopt heat pipe structure.
Above-mentioned reboiler adopts serpentine tube or pipe shell type heat exchange structure, and outside welding or the flange of adopting is fixed on drum.
Above-mentioned reboiler is fixed on distance drum more than liquid level 100mm by support.
The utility model has following advantage and positively effect:
1, the utility model combines heat-exchanger rig by fume afterheat, can efficient recovery fume afterheat, part waste heat is delivered in ammonia still and is flashed off steam, thus realize the object of ammonia still process after heating ammonia still process recycling waste water to superheat state by the reboiler be arranged in drum.And in drum the water of condensation of steam continue through vaporizer absorb flue gas heat carry out steam/water circulating produce steam, steam delivers to steam outer net by the vapour outlet of drum, and the recovery utilization rate of waste heat reaches about 50%
2, the utility model is by the mode of steam indirect heating waste water, avoids flue gas direct heating waste water to form dewpoint corrosion at tube wall, avoids forming ammonia corrosion in waste water side simultaneously, improves the work-ing life of heat-exchange system.
3, the utility model is by the direct ammonia still process of heating cycle waste water, decreases steam ammonia still process and the wastewater treatment expense, the minimizing wastewater discharge that increase, provides Reliable guarantee, produce huge environmental benefit to the wastewater zero discharge of coke-oven plant.
Accompanying drawing illustrates:
Fig. 1 is structural representation of the present utility model;
Fig. 2 is the structural representation of fume afterheat combination heat-exchanger rig.
Embodiment:
As shown in Figure 1, 2: a kind of flue gases of cock oven residual heat using device, at the other flue multiple line that be arranged in parallel of coke oven underground flue, flue multiple line is installed gas approach valve 1, fume afterheat combination heat-exchanger rig 2, smoke induced draught fan 3 and exhanst gas outlet valve 4.At coke oven underground flue top drilling, increase flue damper plate valve 5, before chimney valve, extract flue gas, install the smoke induced draught fan of fume afterheat combination heat-exchanger rig also by increasing additional, the flue gas after heat exchange is delivered to original place lower flue, again from smoke stack emission.
Described fume afterheat combination heat-exchanger rig comprises drum 6, reboiler 7, two groups of vaporizers and economizers.Described reboiler adopts serpentine tube or pipe shell type heat exchange pattern, and reboiler is arranged in drum, and its outside welding or flange of adopting is fixed on drum, and its inside is fixed on distance drum more than liquid level 100mm by support.Reboiler is by vapor condensation heat-exchange, its shell side walks steam, tube side walks distilled ammonia wastewater, the water-in of reboiler is connected by the outlet of pipeline with ammonia circulation pump 8, the import of ammonia circulation pump is connected with the cold water pipe of ammonia still, the water outlet of reboiler is connected with the hot-water line of ammonia still, and pipeline arranges constant pressure valve, stopping valve etc.Vapour outlet on described drum connects steam outer net.
Described vaporizer and economizer adopt heat pipe structure, can realize enhanced heat exchange under Low Temperature Difference.
Described ammonia circulation pump adopts variable frequency control, according to the payload of ammonia steaming system, and variable frequency adjustment quantity of circulating water.Steam more than needed after realizing ammonia still process, delivers to pipe network by vapour line.
Working process of the present utility model is:
1, vaporizer and economizer absorb the heat of flue gas, by the steam/water circulating of heat transfer tube, in drum, flash off the saturation steam of design rated pressure, the acid dew point of interchanger wall temperature higher than flue gas can be controlled in this way, prevent fume side generation dew point corrosion.
2, when ammonia steaming system works, the waste water of ammonia still is delivered to the water-in of reboiler on drum by ammonia circulation pump, reboiler utilizes vaporizer and economizer to deliver to the flue gas heat in drum and the steam in drum carries out heat exchange, recirculated water (excessively hot) after heating is delivered to ammonia still by the water outlet of reboiler and is flashed off steam, realizes ammonia still process.And in drum the water of condensation of steam continue through vaporizer absorb flue gas heat carry out steam/water circulating produce steam, steam delivers to steam outer net by the vapour outlet of drum.
3, when ammonia steaming system does not work, close ammonia circulation pump and be connected the water inlet pipe of reboiler, the valve of rising pipe, reboiler quits work, and the heat that vaporizer and economizer absorb flue gas delivers to full scale production steam after drum, delivers to steam outer net by vapour line.
The utility model can utilize fume afterheat heating from the recycling waste water of ammonia still, can also produce low-pressure saturated steam.
Claims (5)
1. a flue gases of cock oven residual heat using device, is characterized in that: arrange flue multiple line on coke oven underground flue side, and flue multiple line is installed gas approach valve, fume afterheat combination heat-exchanger rig, smoke induced draught fan and exhanst gas outlet valve; Described fume afterheat combination heat-exchanger rig comprises drum, reboiler, vaporizer and economizer, and described reboiler is arranged in drum, and is fixed on drum outer wall; The water-in of described reboiler is connected with ammonia circulation pump outlet by pipeline, and the import of ammonia circulation pump is connected with the cold water pipe of ammonia still, and the water outlet of reboiler is connected with the hot-water line of ammonia still; Vapour outlet on described drum connects steam outer net.
2. flue gases of cock oven residual heat using device according to claim 1, is characterized in that: above-mentioned flue multiple line and underground flue be arranged in parallel.
3. flue gases of cock oven residual heat using device according to claim 1, is characterized in that: above-mentioned vaporizer and economizer adopt heat pipe structure.
4. flue gases of cock oven residual heat using device according to claim 1, is characterized in that: above-mentioned reboiler adopts serpentine tube or pipe shell type heat exchange structure, and outside welding or the flange of adopting is fixed on drum.
5. flue gases of cock oven residual heat using device according to claim 1, is characterized in that: above-mentioned reboiler is fixed on distance drum more than liquid level 100mm by support.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520224583.6U CN204569809U (en) | 2015-04-14 | 2015-04-14 | Flue gases of cock oven residual heat using device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520224583.6U CN204569809U (en) | 2015-04-14 | 2015-04-14 | Flue gases of cock oven residual heat using device |
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| Publication Number | Publication Date |
|---|---|
| CN204569809U true CN204569809U (en) | 2015-08-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201520224583.6U Expired - Fee Related CN204569809U (en) | 2015-04-14 | 2015-04-14 | Flue gases of cock oven residual heat using device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107191906A (en) * | 2017-06-19 | 2017-09-22 | 江苏永钢集团有限公司 | One kind sintering flue gas waste heat recovery system |
-
2015
- 2015-04-14 CN CN201520224583.6U patent/CN204569809U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107191906A (en) * | 2017-06-19 | 2017-09-22 | 江苏永钢集团有限公司 | One kind sintering flue gas waste heat recovery system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150819 Termination date: 20170414 |