CN205299570U - A surperficial formula gas gas heater for afterbody flue - Google Patents
A surperficial formula gas gas heater for afterbody flue Download PDFInfo
- Publication number
- CN205299570U CN205299570U CN201521084456.7U CN201521084456U CN205299570U CN 205299570 U CN205299570 U CN 205299570U CN 201521084456 U CN201521084456 U CN 201521084456U CN 205299570 U CN205299570 U CN 205299570U
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- flue gas
- valve
- gas
- exchange unit
- gas heat
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/30—Technologies for a more efficient combustion or heat usage
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- Exhaust Gas Treatment By Means Of Catalyst (AREA)
- Treating Waste Gases (AREA)
Abstract
(B, ) the utility model discloses a surperficial formula gas gas heater for afterbody flue. Present heat exchanger all adopt electrical heating or extraction in the stove flue gas carry out the heat transfer through the heat exchanger to the stove outside, cigarette wind pipe arrangement is complicated, arrange that the comparison is difficult, the cost is also higher. The utility model discloses a constitution includes: cold air conduit (b) (b) 1 (b) (b), cold air conduit be connected with governing valve (b) (b) 2 (b) (b), the governing valve be connected with surperficial formula gas gas heater (b) (b) 3 (b) (b), surperficial formula gas gas heater be connected with shut -off valve (b) (b) 4 (b) (b), the shut -off valve be connected with thermocouple (b) (b) 5 (b) (b), the thermocouple be connected with hot air pipe way (b) (b) 6 (b) (b). (B, )
Description
Technical field:
This utility model relates to a kind of surface-type flue gas heat-exchange unit for back-end ductwork.
Background technology:
Current station boiler existing urea pyrolysis system is both needed to hot blast, makes carbamide decompose by hot blast, and then manufactures required ammonia. The hot blast of conventional urea pyrolysis system heats cold wind typically via electric heating system, along with power plant is more and more stricter to the control of station service power consumption rate in recent years, the shortcoming that electrical heating power consumption is big comes into one's own, and for reducing power consumption, some engineering adopts and extracts high-temperature flue gas in boiler, it is connected to the heat exchanger heating cold wind outside stove, it is many that the method connects pipeline, causes pipe arrangement very complicated, and the floor space of heater is big simultaneously, being inconvenient to arrange, cost is also significantly high.
Utility model content:
The purpose of this utility model is to provide a kind of surface-type flue gas heat-exchange unit for back-end ductwork.
Above-mentioned purpose is realized by following technical scheme:
A kind of surface-type flue gas heat-exchange unit for back-end ductwork, its composition includes: cold-air duct, described cold-air duct is connected with regulating valve, described adjustment valve is connected with surface-type flue gas heat-exchange unit, described surface-type flue gas heat-exchange unit is connected with shut-off valve, described shut-off valve is connected with thermocouple, and described thermocouple is connected with hot-air duct.
The described surface-type flue gas heat-exchange unit for back-end ductwork, described surface-type flue gas heat-exchange unit is arranged in the back-end ductwork place of boiler.
The beneficial effects of the utility model:
1, this utility model surface-type smoke heat exchanger system does not adopt traditional electrical heating or extracts inner flue gas of the stove to the mode outside stove, and by surface-type flue gas heat-exchange unit is arranged in back-end ductwork, boiler platform space need not be taken, more save space, by boiler tail flue gas directly and cold air heat exchange in surface-type flue gas heat-exchange unit, reach to meet the demand of heating cold wind, heats is more preferably, only air channel need to be arranged outside stove, pipe arrangement is simple, small investment, run easy to operate, there is good economy, adaptability and market potential, practical, there is good development prospect.
, this utility model is by surface-type heat exchanger and furnace high-temperature flue gas heat exchange, heat transfer effect is better, can ensure that continuous print hot blast rate simultaneously, can prevent traditional mode of heating from causing pyrolysis installation not come into operation owing to heater power-off and flue gas ejector break down, affect denitrating system devoting rate, improve the reliability of urea pyrolysis system.
, this utility model can according under different load, by the adjustment valve of entrance, regulate the cold flow through surface-type heat exchanger, and then regulate the temperature of cold wind outlet, adapting to boiler different load urea pyrolysis put into operation the temperature of hot blast demand, the method for operation is relatively flexible.
, the relatively whole boiler thermodynamic system of this utility model, recept the caloric less, on the thermal balance of whole steam generator system without impact.
Accompanying drawing illustrates:
Accompanying drawing 1 is structural representation of the present utility model.
Detailed description of the invention:
Embodiment 1:
A kind of surface-type flue gas heat-exchange unit for back-end ductwork, its composition includes: cold-air duct 1, it is characterized in that: described cold-air duct is connected with regulating valve 2, described adjustment valve is connected with surface-type flue gas heat-exchange unit 3, described surface-type flue gas heat-exchange unit is connected with shut-off valve 4, described shut-off valve is connected with thermocouple 5, and described thermocouple is connected with hot-air duct 6.
Embodiment 2:
The surface-type flue gas heat-exchange unit for back-end ductwork according to embodiment 1, described surface-type flue gas heat-exchange unit is arranged in the back-end ductwork place of boiler.
Embodiment 3:
The described surface-type flue gas heat-exchange unit for back-end ductwork, under boiler maximum continuous rating, temperature is 20 DEG C, and flow is at 3500NM
3
The cold wind of/h, by cold-air duct, when control valve opening is 85%, by surface-type flue gas heat-exchange unit, when outlet temperature reaches 600 DEG C, opening shut-off valve, the cold wind after heat exchange passes through hot-air duct, mix with the ammonia produced, subsequently in denitrification apparatus, and smoke reaction, reach the purpose of denitration, thermocouple is set before hot-air duct simultaneously, the temperature of the facial flue gas heat-exchange unit outlet of reconciliation statement;
At low load, required cold wind is few, and simultaneously required hot blast temperature is low, and temperature is 20 DEG C, and flow is at 2700NM
3
The cold wind of/h, pass through cold-air duct, at control valve opening when 60%, by surface-type flue gas heat-exchange unit, when outlet temperature reaches about 500 DEG C, open shut-off valve, cold wind after heat exchange passes through hot-air duct, mixes with the ammonia produced, subsequently in denitrification apparatus, with smoke reaction, reach the purpose of denitration.
Claims (2)
1. the surface-type flue gas heat-exchange unit for back-end ductwork, its composition includes: cold-air duct, it is characterized in that: described cold-air duct is connected with regulating valve, described adjustment valve is connected with surface-type flue gas heat-exchange unit, described surface-type flue gas heat-exchange unit is connected with shut-off valve, described shut-off valve is connected with thermocouple, and described thermocouple is connected with hot-air duct.
2. the surface-type flue gas heat-exchange unit for back-end ductwork according to claim 1, is characterized in that: described surface-type flue gas heat-exchange unit is arranged in the back-end ductwork place of boiler.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521084456.7U CN205299570U (en) | 2015-12-23 | 2015-12-23 | A surperficial formula gas gas heater for afterbody flue |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521084456.7U CN205299570U (en) | 2015-12-23 | 2015-12-23 | A surperficial formula gas gas heater for afterbody flue |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205299570U true CN205299570U (en) | 2016-06-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201521084456.7U Active CN205299570U (en) | 2015-12-23 | 2015-12-23 | A surperficial formula gas gas heater for afterbody flue |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205299570U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105423323A (en) * | 2015-12-23 | 2016-03-23 | 哈尔滨锅炉厂有限责任公司 | Surface type gas-gas heater for tail flue and heat exchange method thereof |
-
2015
- 2015-12-23 CN CN201521084456.7U patent/CN205299570U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105423323A (en) * | 2015-12-23 | 2016-03-23 | 哈尔滨锅炉厂有限责任公司 | Surface type gas-gas heater for tail flue and heat exchange method thereof |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |