CN204042853U - Steam boiler waste heat reclaims and system for deoxidizing by heat power - Google Patents
Steam boiler waste heat reclaims and system for deoxidizing by heat power Download PDFInfo
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- CN204042853U CN204042853U CN201420463199.7U CN201420463199U CN204042853U CN 204042853 U CN204042853 U CN 204042853U CN 201420463199 U CN201420463199 U CN 201420463199U CN 204042853 U CN204042853 U CN 204042853U
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Abstract
The utility model discloses a kind of steam boiler waste heat to reclaim and system for deoxidizing by heat power, the exhanst gas outlet of steam boiler by flue successively with boiler economizer, low temperature exhaust heat retracting device, chimney is communicated with, steam boiler connects steam pipeline, softened water tank is communicated with the upper water inlet of the deoxygenation head of thermal deaerator, the lower inlet of deoxygenation head is communicated with steam pipeline, the water inlet of low temperature exhaust heat retracting device is communicated with the water tank of oxygen-eliminating device by down-comer, delivery port is communicated with the water tank of oxygen-eliminating device by tedge, series circulation water pump on down-comer, series voltage-regulating valve on tedge, the water inlet of boiler economizer is communicated with the water tank of oxygen-eliminating device, delivery port is communicated with the water inlet of steam boiler.The utility model can effective recovered flue gas low temperature exhaust heat, reduce exhaust gas temperature to 130-140 DEG C, improve boiler thermal output, and do not block up in fume side, rotten, leak, the problem of mill, there is not oxygen corrosion and steam hammer phenomenon in water side, realize steam generator system safe operation.
Description
Technical field
The utility model belongs to boiler afterheat and reclaims field, particularly relates to a kind of steam boiler waste heat and reclaims and system for deoxidizing by heat power.
Background technology
China's coal-burned industrial boiler hundreds of thousands platform, the combustion system of boiler, heat-supplying mode and exhaust gas temperature are also different.Conventional vapor boiler is because of the difference of pressure of steam supply, and simultaneously because of the difference of combustion system and fuel element, exhaust gas temperature is generally at 160-180 DEG C, even higher, causes mass energy to waste.
By the pressure that energy prices go up and industry energy conservation reduces discharging, part boiler has carried out reducing energy consumption, generally adopts after boiler economizer, then increases soft water preheating device, to reduce exhaust gas temperature.As shown in Figure 1, low temperature exhaust heat retracting device 3a is directly connected on steam generator system flue collector, and flue gas system is boiler 1a, boiler economizer 2a, low temperature exhaust heat retracting device 3a, dust-removing desulfurating apparatus 4a, air-introduced machine 5a, chimney 6a are communicated with by flue successively; Water system comprises softened water tank 7a, softened water pump 71a, low temperature exhaust heat retracting device 3a, thermal deaerator 8a, boiler feed pump 21a.The normal temperature demineralized water of 20 DEG C, low temperature exhaust heat retracting device 3a is delivered to by softened water pump 71a, after being heated to 40-60 DEG C, upper water inlet through deoxygenation head 81a delivers to thermal deaerator 8a, contact with the external steam counter-flow of deoxygenation head lower inlet, water is heated to more than 104 DEG C, completes demineralized water deoxygenation, and deaerated water is delivered to after boiler economizer 2a heats further by boiler feed pump 21a and entered boiler 1a moisturizing.
Said apparatus is in the starting stage, really the effect reducing exhaust gas temperature is played, but just there is various problem after running a period of time: (1) heat transferring medium and demineralized water inlet temperature are normal temperature 20 DEG C, the wall temperature of heated surface of low temperature exhaust heat retracting device is at 30-40 DEG C, and flue gas dew point is at about 110 DEG C, the SO now in flue gas
2, SO
3acid dew H is formed at heating surface with water
2sO
4and H
2sO
3, thus there is corrosion and dust stratification, equipment just causes heat exchange efficiency sharply to decline in 3-5 month in operation, causes boiler normally not run time serious because ash is stifled; (2) demineralized water is without deoxygenation, and heat exchanger tube, in water side, electrochemical corrosion and oxygen corrosion occurs, and particularly select the area of surface water, heat exchanger tube corrodes from the inside to the outside gradually, causes leakage, stops, and accelerate gas-side corrosion and dust stratification; (3) because boiler operatiopn load variations, boiler water supply is discontinuous, steams in boiler economizer, then produces carbonated drink hammering after supplying water, and causes device damage for a long time.After above problem causes waste-heat recovery device to run a period of time, problem occurs frequently, and finally has to remove.
Utility model content
The technical problems to be solved in the utility model be to provide a kind of reduce exhaust gas temperature, improve boiler thermal output, ensure safe operation of the boiler steam boiler waste heat reclaim and system for deoxidizing by heat power.
For solving the problems of the technologies described above, the utility model adopts following technical scheme:
A kind of steam boiler waste heat reclaims and system for deoxidizing by heat power, comprise steam boiler, boiler economizer, low temperature exhaust heat retracting device, chimney, softened water tank, thermal deaerator, the exhanst gas outlet of steam boiler by flue successively with boiler economizer, low temperature exhaust heat retracting device, chimney is communicated with, the steam (vapor) outlet of steam boiler connects steam pipeline, wherein said softened water tank is communicated with by the upper water inlet of supply channel with the deoxygenation head of thermal deaerator, supply channel to be connected softened water pump, the lower inlet of deoxygenation head is communicated with steam pipeline by steam branch line, steam branch line to be connected steam control valve, the water inlet of low temperature exhaust heat retracting device is communicated with the water tank of thermal deaerator by down-comer, delivery port is communicated with the water tank of thermal deaerator by tedge, series circulation water pump on down-comer, series voltage-regulating valve on tedge, the water inlet of the heat exchanger tube of boiler economizer is communicated with the water tank of thermal deaerator by pipeline, pipeline to be connected boiler water pump, delivery port is communicated with the water inlet of steam boiler by pipeline.
The utility model steam boiler waste heat reclaims and system for deoxidizing by heat power, wherein said low temperature exhaust heat retracting device comprises upper shell, lower house and some heat exchange units, on, opened by flue gas baffle for separating between lower house, each heat exchange unit comprises some phase transformation heat pipes, upper collecting chamber pipe, lower box collecting pipe, heat exchanger tube, upper collecting chamber pipe and lower box collecting pipe are arranged in upper shell, upper collecting chamber pipe, be connected by heat exchanger tube between lower box collecting pipe, phase transformation heat pipe is positioned at lower house, be heat transferring medium in phase transformation heat pipe, phase transformation heat pipe stretches in corresponding heat exchanger tube through flue gas dividing plate, the upper collecting chamber pipe of a upper heat exchange unit and the lower box collecting pipe of next heat exchange unit pass through pipeline communication, the lower box collecting pipe of first heat exchange unit is communicated with the water tank of thermal deaerator by down-comer, the upper collecting chamber pipe of last heat exchange unit is communicated with the water tank of thermal deaerator by tedge.
The utility model steam boiler waste heat reclaims and system for deoxidizing by heat power, wherein also comprises dust-removing desulfurating apparatus and air-introduced machine, and the lower house of low temperature exhaust heat retracting device is communicated with dust-removing desulfurating apparatus, air-introduced machine, chimney successively by flue.
The utility model steam boiler waste heat reclaims and system for deoxidizing by heat power, closed circuit heating circulation system is formed between low temperature exhaust heat retracting device and thermal deaerator, what run all the time in low temperature exhaust heat retracting device is the recirculated water of more than 104-120 DEG C, the wall surface temperature of heat exchanger tube controls more than 110 DEG C, heat exchanging pipe wall can not form acid dew, thus ensures dew point corrosion and dust stratification can not occur; Be simultaneously 104 DEG C of deaerated water due to what adopt in heat exchanger tube, thus avoid the dissolving O in water
2with intermetallic generation electrochemical corrosion, heat exchanger tube water side is caused to reveal.The utility model can effective recovered flue gas low temperature exhaust heat, reduce exhaust gas temperature to 130-140 DEG C, improve boiler thermal output, and do not block up in fume side, rotten, leak, the problem of mill, there is not oxygen corrosion and steam hammer phenomenon in water side, realize steam generator system safe operation.
Below in conjunction with drawings and Examples, the utility model is described in further detail.
Accompanying drawing explanation
Fig. 1 is the structural representation of prior art steam boiler waste heat recovery system;
Fig. 2 is the structural representation of the recovery of the utility model steam boiler waste heat and system for deoxidizing by heat power;
Fig. 3 is the structural representation of low temperature exhaust heat retracting device;
Fig. 4 is the structural representation of heat exchange unit in low temperature exhaust heat retracting device.
Detailed description of the invention
As shown in Figure 2, the utility model steam boiler waste heat reclaims and system for deoxidizing by heat power comprises steam boiler 1, boiler economizer 2, low temperature exhaust heat retracting device 3, dust-removing desulfurating apparatus 4, air-introduced machine 5, chimney 6, softened water tank 7, thermal deaerator 8, and the exhanst gas outlet of steam boiler 1 is communicated with boiler economizer 2, low temperature exhaust heat retracting device 3, dust-removing desulfurating apparatus 4, air-introduced machine 5, chimney 6 successively by flue.The steam (vapor) outlet of steam boiler 1 connects steam pipeline 11, steam is delivered to user side and uses.Softened water tank 7 is communicated with by the upper water inlet 82 of the deoxygenation of supply channel 71 and thermal deaerator 8 81, supply channel 71 to be connected softened water pump 72, the lower inlet 83 of deoxygenation 81 is communicated with steam pipeline 11 by steam branch line 84, steam control valve 85 that steam branch line 84 is connected.
Composition graphs 3, shown in Fig. 4, low temperature exhaust heat retracting device 3 comprises upper shell 31, lower house 32 and some heat exchange units, on, separated by flue gas dividing plate 33 between lower house, four heat exchange units shown in figure, each heat exchange unit comprises some phase transformation heat pipes 34, upper collecting chamber pipe 35, lower box collecting pipe 36, heat exchanger tube 37, each heat exchange unit shown in figure comprises four phase transformation heat pipes 34, upper collecting chamber pipe 35 and lower box collecting pipe 36 are arranged in upper shell 31, upper collecting chamber pipe, be connected by heat exchanger tube 37 between lower box collecting pipe, phase transformation heat pipe 34 is positioned at lower house 32, phase transformation heat pipe 34 stretches in corresponding heat exchanger tube 37 through flue gas dividing plate 33.The upper collecting chamber pipe 35 of a upper heat exchange unit passes through pipeline communication with the lower box collecting pipe 36 of next heat exchange unit.Be heat transferring medium in phase transformation heat pipe 34.
The lower box collecting pipe 36 of first heat exchange unit of low temperature exhaust heat retracting device 3 is communicated with the water tank of thermal deaerator 8 by down-comer 86, the upper collecting chamber pipe 35 of last heat exchange unit of low temperature exhaust heat retracting device 3 is communicated with the water tank of thermal deaerator 8 by tedge 87, series circulation water pump 88 on down-comer 86, series voltage-regulating valve 89 on tedge 87.The water inlet of the heat exchanger tube 21 of boiler economizer 2 is communicated with by the water tank of pipeline with thermal deaerator 8, boiler water pump 22 that pipeline is connected, and delivery port is communicated with by the water inlet of pipeline with steam boiler 1.
The utility model steam boiler waste heat reclaims and the course of work of system for deoxidizing by heat power is: 20 DEG C of normal temperature demineralized waters are by softened water pump 72, upper water inlet through deoxygenation 81 enters oxygen-eliminating device 8, with the external steam of deoxygenation head lower inlet and the self-produced steam of low temperature exhaust heat retracting device, mixing adverse current thermoplastic water to 104 DEG C completes deoxygenation; 104 DEG C of deaerated water from oxygen-eliminating device 8 are divided into two-way, one tunnel enters in low temperature exhaust heat retracting device 3 through water circulating pump 88, under the pressure of setting, flue gas carries out heat exchange by the heat transferring medium in phase transformation heat pipe 34 and deaerated water, be heated to form the superheated water of more than 120 DEG C, superheated water is sent back in oxygen-eliminating device 8, reduces pressure and produces low-pressure steam, for deoxygenation, not enough steam is supplemented by Boiler Steam; Another road is delivered in boiler economizer 2 under boiler water pump 22 acts on, and with flue gas heat exchange, delivers to boiler 1 moisturizing after being heated.High-temperature flue gas is once cooled to 180 DEG C through boiler economizer 2, then after low temperature exhaust heat retracting device 3 reducing temperature twice to 140 DEG C, after dust-removing desulfurating apparatus 4 dust-removal and desulfurizing, discharges from chimney 6 through air-introduced machine 5.So move in circles, ensure that steam boiler and residual neat recovering system normally run.
The utility model steam boiler waste heat reclaims and system for deoxidizing by heat power has the following advantages:
1, closed circuit heating circulation system is formed between low temperature exhaust heat retracting device and thermal deaerator, what run all the time in low temperature exhaust heat retracting device is the recirculated water of more than 104-120 DEG C, the wall surface temperature of heat exchanger tube controls more than 110 DEG C, heat exchanging pipe wall can not form acid dew, thus ensures dew point corrosion and dust stratification can not occur; Be simultaneously 104 DEG C of deaerated water due to what adopt in heat exchanger tube, thus avoid the dissolving O in water
2with intermetallic generation electrochemical corrosion, heat exchanger tube water side is caused to reveal;
2, low temperature exhaust heat retracting device passes through water circulating pump, keep deaerated water continuous-flow heat exchange, 104 DEG C of deaerated water are through low temperature exhaust heat retracting device, be heated to form the superheated water of more than 120 DEG C with flue gas heat exchange, then send oxygen-eliminating device decompression back to, flash distillation forms the low-pressure saturated steam of more than 104 DEG C, to boiler replenishing water deoxygenation, substitute or Some substitute from the high-grade steam of boiler, utilize fume afterheat directly to carry out thermal de-aeration, saved the part energy;
3, the tedge between low temperature exhaust heat retracting device and oxygen-eliminating device increases pressure regulator valve, can according to flue-gas temperature height, smoke components difference (as moisture, dust and SO
2, SO
3content etc.) and the size of water side temperature rise, determine the pressure size in low temperature exhaust heat retracting device, by pressure regulator valve level pressure, ensure not steam in water side, keep superheated water state, avoid producing steam in low temperature exhaust heat retracting device and steam hammer occurring, cause heat exchanger tube to shake and fatigue stress breakage;
4, heat exchanger tube water inlet and gas approach are in the same way, adopt following current heat exchange, i.e. relative low temperature water and high-temperature flue gas heat exchange, relatively-high temperature water and low-temperature flue gas heat exchange, and same raising heat exchanging pipe wall temperature, avoids the formation of dewpoint corrosion and dust stratification;
5, low temperature exhaust heat retracting device adopts the separated version of fume side and water side, water side adopts sleeve structure, the heat transferring medium in flue gas and phase transformation heat pipe is adopted to carry out heat exchange, heat transferring medium carries out the mode of heat exchange with water again, flue gas is not directly contacted with water side heat exchanger tube, prevent dew point corrosion and dust stratification further, bearing capacity is strong; Low temperature exhaust heat retracting device comprises several heat exchange units, and water enters next heat exchange unit heat exchange successively after first heat exchange unit heat exchange, flows out, good effect of heat exchange from last heat exchange unit.
Above-described embodiment is only be described preferred embodiment of the present utility model; not scope of the present utility model is limited; under the prerequisite not departing from the utility model design spirit; the various distortion that those of ordinary skill in the art make the technical solution of the utility model and improvement, all should fall in protection domain that the utility model claims determine.
Claims (3)
1. a steam boiler waste heat reclaims and system for deoxidizing by heat power, comprise steam boiler, boiler economizer, low temperature exhaust heat retracting device, chimney, softened water tank, thermal deaerator, the exhanst gas outlet of steam boiler by flue successively with boiler economizer, low temperature exhaust heat retracting device, chimney is communicated with, the steam (vapor) outlet of steam boiler connects steam pipeline, it is characterized in that: described softened water tank is communicated with by the upper water inlet of supply channel with the deoxygenation head of thermal deaerator, supply channel to be connected softened water pump, the lower inlet of deoxygenation head is communicated with steam pipeline by steam branch line, steam branch line to be connected steam control valve, the water inlet of low temperature exhaust heat retracting device is communicated with the water tank of thermal deaerator by down-comer, delivery port is communicated with the water tank of thermal deaerator by tedge, series circulation water pump on down-comer, series voltage-regulating valve on tedge, the water inlet of the heat exchanger tube of boiler economizer is communicated with the water tank of thermal deaerator by pipeline, pipeline to be connected boiler water pump, delivery port is communicated with the water inlet of steam boiler by pipeline.
2. steam boiler waste heat according to claim 1 reclaims and system for deoxidizing by heat power, it is characterized in that: described low temperature exhaust heat retracting device comprises upper shell, lower house and some heat exchange units, on, opened by flue gas baffle for separating between lower house, each heat exchange unit comprises some phase transformation heat pipes, upper collecting chamber pipe, lower box collecting pipe, heat exchanger tube, upper collecting chamber pipe and lower box collecting pipe are arranged in upper shell, upper collecting chamber pipe, be connected by heat exchanger tube between lower box collecting pipe, phase transformation heat pipe is positioned at lower house, be heat transferring medium in phase transformation heat pipe, phase transformation heat pipe stretches in corresponding heat exchanger tube through flue gas dividing plate, the upper collecting chamber pipe of a upper heat exchange unit and the lower box collecting pipe of next heat exchange unit pass through pipeline communication, the lower box collecting pipe of first heat exchange unit is communicated with the water tank of thermal deaerator by down-comer, the upper collecting chamber pipe of last heat exchange unit is communicated with the water tank of thermal deaerator by tedge.
3. steam boiler waste heat according to claim 2 reclaims and system for deoxidizing by heat power, it is characterized in that: also comprise dust-removing desulfurating apparatus and air-introduced machine, the lower house of low temperature exhaust heat retracting device is communicated with dust-removing desulfurating apparatus, air-introduced machine, chimney successively by flue.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420463199.7U CN204042853U (en) | 2014-08-15 | 2014-08-15 | Steam boiler waste heat reclaims and system for deoxidizing by heat power |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420463199.7U CN204042853U (en) | 2014-08-15 | 2014-08-15 | Steam boiler waste heat reclaims and system for deoxidizing by heat power |
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| Publication Number | Publication Date |
|---|---|
| CN204042853U true CN204042853U (en) | 2014-12-24 |
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ID=52243512
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|---|---|---|---|
| CN201420463199.7U Expired - Fee Related CN204042853U (en) | 2014-08-15 | 2014-08-15 | Steam boiler waste heat reclaims and system for deoxidizing by heat power |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105202524A (en) * | 2015-09-21 | 2015-12-30 | 东港市华瑞彩钢有限公司 | Automatic water-feeding device for boiler |
| CN107940440A (en) * | 2017-12-13 | 2018-04-20 | 北京京诚凤凰工业炉工程技术有限公司 | New heating power deaeration in condenser system |
| CN110906312A (en) * | 2019-12-05 | 2020-03-24 | 徐州工业锅炉有限公司 | Condensing boiler drum liquid level control system with energy-saving technology |
| CN111609393A (en) * | 2020-05-29 | 2020-09-01 | 青岛创客智造机械设备有限公司 | Boiler synergy integration system |
-
2014
- 2014-08-15 CN CN201420463199.7U patent/CN204042853U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105202524A (en) * | 2015-09-21 | 2015-12-30 | 东港市华瑞彩钢有限公司 | Automatic water-feeding device for boiler |
| CN107940440A (en) * | 2017-12-13 | 2018-04-20 | 北京京诚凤凰工业炉工程技术有限公司 | New heating power deaeration in condenser system |
| CN107940440B (en) * | 2017-12-13 | 2024-03-26 | 北京京诚凤凰工业炉工程技术有限公司 | Thermal vacuum deoxidizing system |
| CN110906312A (en) * | 2019-12-05 | 2020-03-24 | 徐州工业锅炉有限公司 | Condensing boiler drum liquid level control system with energy-saving technology |
| CN111609393A (en) * | 2020-05-29 | 2020-09-01 | 青岛创客智造机械设备有限公司 | Boiler synergy integration system |
| CN111609393B (en) * | 2020-05-29 | 2022-04-29 | 青岛创客智造机械设备有限公司 | Boiler synergy integration 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: 20141224 Termination date: 20190815 |