CN102425976A - Automatic temperature regulating method of high-temperature flue gas for metal heat exchanger - Google Patents
Automatic temperature regulating method of high-temperature flue gas for metal heat exchanger Download PDFInfo
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- CN102425976A CN102425976A CN2011104221071A CN201110422107A CN102425976A CN 102425976 A CN102425976 A CN 102425976A CN 2011104221071 A CN2011104221071 A CN 2011104221071A CN 201110422107 A CN201110422107 A CN 201110422107A CN 102425976 A CN102425976 A CN 102425976A
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Abstract
The invention relates to an automatic temperature regulating method of high-temperature flue gas for metal heat exchanger. The automatic temperature regulating method is applied to kilns in the industries of metallurgy, petrifaction, building materials and the like. According to the automatic temperature regulating method disclosed by the invention, a cooling medium is supplied by a cooling medium supplying unit; and the flow of the cooling medium added into the exchanger is automatically controlled by a logic control unit, so that the temperature of flue gas in the heat exchanger meets the requirement of inlet temperature. Compared with the prior art, the automatic temperature regulating method disclosed by the invention has the advantages that: under the condition of not changing traditional equipment, the temperature of waste gas at an inlet of the heat exchanger can be automatically regulated, the requirement of the metal exchanger on the temperature of gas at the inlet is met, the safe operation of the equipment is ensured and the service life of the equipment is prolonged.
Description
Technical field
The present invention relates to the flue gas automatic temperature-control method of the metallic recuperator of the recovery high-temperature flue gas waste heat that industry kilns such as metallurgy, petrochemical industry, building materials use.
Background technology
Be used to reclaim the high-temperature flue gas waste heat that kiln discharges metallic recuperator since small investment, compact equipment, advantage such as occupation of land is little, maintenance is few be widely used in industries such as metallurgy, petrochemical industry, building materials.But metallic recuperator has certain restriction to the temperature of inlet high-temperature flue gas, and general temperature can not be above 800 ℃.Otherwise, the service life that can reduce metallic recuperator.Severe patient more, the heat resisting steel of heat exchanger is receiving under the action of high temperature, and intensity reduces greatly and causes heat exchanger and deform, or the excessive phenomenon such as local weld cracking that causes of stress, has a strong impact on to produce and the safe operation of equipment.
Summary of the invention
The purpose of this invention is to provide a kind of high-temperature flue gas automatic temperature-control method that is used for metallic recuperator; This method is under the situation that does not change existing equipment; Can realize regulating automatically the EGT of heat exchanger entrance; Satisfy the requirement of metallic recuperator, guarantee the safe operation of equipment, improve the service life of equipment the porch gas temperature.
For realizing above-mentioned purpose, the present invention adopts following technical scheme to realize:
A kind of high-temperature flue gas automatic temperature-control method that is used for metallic recuperator; This method infeeds cooling medium through the cooling medium feed unit; And control automatically through logic control element and to add the inner cooling medium consumption of heat exchanger, make the flue-gas temperature that gets in the heat exchanger satisfy the inlet temperature requirement; Specifically may further comprise the steps:
1) related device comprises temperature detecting unit, logic control element, cooling medium feed unit, flow automatic control unit, automatic temperature-control body;
2) described temperature detecting unit is used for detecting the gas outlet temperature after high-temperature flue gas entry temperature and the heat exchange;
3) described logic control element reaches the rule of thumb cooling medium addition of data in advance setting according to the high-temperature flue gas entry temperature of temperature detecting unit detection, and the aperture of automatic regulating valve when calculating the equipment initial launch is carried out temperature and just regulated;
4) gas outlet temperature after the heat exchange that detects according to temperature detecting unit of described logic control element; This temperature and the inlet operating temperature that the heat exchanger that presets can bear are compared; Automatic regulating valve aperture to after the first adjusting is adjusted automatically, and control gets into the cooling medium consumption of heat exchanger automatically; Realize that control automatically gets into the inner flue-gas temperature of metallic recuperator.
Carry the pipe outlet of cooling medium that atomizer is installed in the said automatic temperature-control body; According to the size and the pressure cooling medium that connect heat exchanger entrance waste gas caliber; Corresponding atomizer is installed; When guaranteeing that high-temperature flue gas is flowed through automatic temperature-regulator with cooling medium evenly, stably mix cooling apace.
Compared with prior art, advantage of the present invention is:
Solved the problem of metal current heat exchanger, guaranteed heat exchanger operate as normal under specified serviceability temperature the hot-gas temperature restriction; Prolong heat exchanger service life, simple in structure, compact, safe and reliable, need not regular maintenance, can under any hot conditions, use.
Description of drawings
Fig. 1 is a schematic diagram of the present invention;
Fig. 2 is main TV structure figure of the present invention;
Fig. 3 is plan structure figure of the present invention.
Among the figure: 1-cooling medium feed unit 2-automatic regulating valve 3-flow automatic control unit 4-automatic temperature-control body 5-atomizer 6-inlet temperature thermocouple 7-outlet temperature thermocouple 8-metallic recuperator 9-temperature detecting unit 10-logic control element
The specific embodiment
Be described further below in conjunction with the accompanying drawing specific embodiments of the invention:
See Fig. 1～Fig. 3, a kind of high-temperature flue gas automatic temperature-regulator that is used for metallic recuperator comprises cooling medium feed unit 1, flow automatic control unit 3, automatic temperature-control body 4, atomizer 5, temperature detecting unit 9 and logic control element 10.Cooling medium feed unit 1 is used for liquid state such as demineralized water, compressed air or gaseous cooling medium are sent into metallic recuperator inside through conveyance conduit; Flow automatic control unit 3 is used for detecting and controlling automatically the feed flow of cooling medium; Temperature detecting unit 9 comprises inlet temperature thermocouple 6 and outlet temperature thermocouple 7, is used for detecting the gas outlet temperature after high-temperature flue gas entry temperature and the heat exchange respectively.
High-temperature flue gas entry temperature that logic control element 10 detects according to temperature detecting unit and the inlet operating temperature that can bear according to the heat exchanger that presets and the empirical datas such as ability of heat exchanger preestablish the cooling medium addition; The aperture of automatic regulating valve when calculating the equipment initial launch is carried out temperature and is just regulated; Logic control element is again according to gas outlet temperature after the heat exchange of temperature detecting unit detection; This temperature and the inlet operating temperature that the heat exchanger that presets can bear are compared; Automatic regulating valve aperture to after the first adjusting is adjusted automatically, realizes that control automatically gets into the inner flue-gas temperature of metallic recuperator.
In automatic temperature-control body 4, carry the pipe outlet of cooling medium that atomizer 5 is installed; According to the size and the pressure cooling medium that connect heat exchanger entrance waste gas caliber; Corresponding atomizer is installed; When guaranteeing that high-temperature flue gas is flowed through automatic temperature-regulator with cooling medium evenly, stably mix cooling apace.
Cooling medium feed unit 1 sprays into cooling medium in the automatic temperature-control body 4 through automatic regulating valve 2, atomizer 5 through pipeline; Cooling medium is in atomizing rapidly on whole entrance cross-section under the effect of atomizer 5 in automatic temperature-control body 4; And with high-temperature flue gas rapid mixing, the cooling of process, the temperature that the temperature stabilization of high-temperature flue gas is set at the metallic recuperator inlet.
Can adopt different cooling mediums according to the characteristic of flue gas system and requirement etc.:
1) if EGT and heat exchanger entrance require differ less, the ability of smoke evacuation system has and can adopt gaseous cooling medium to lower the temperature under the situation more than needed.
2), can adopt the liquid cooling medium cooling under the surplus capacity condition of limited of smoke evacuation system if the temperature that EGT and heat exchanger entrance require differs greatly.Mainly be to utilize liquid medium, can reduce the consumption of cooling medium so to greatest extent, reduce the load of smoke evacuation system in the character of carrying out to absorb when states of matter changes (gasification) great amount of heat.
Claims (2)
1. high-temperature flue gas automatic temperature-control method that is used for metallic recuperator; It is characterized in that; This method infeeds cooling medium through the cooling medium feed unit; And control automatically through logic control element and to add the inner cooling medium consumption of heat exchanger, make the flue-gas temperature that gets in the heat exchanger satisfy the inlet temperature requirement; Specifically may further comprise the steps:
1) related device comprises temperature detecting unit, logic control element, cooling medium feed unit, flow automatic control unit, automatic temperature-control body;
2) described temperature detecting unit is used for detecting the gas outlet temperature after high-temperature flue gas entry temperature and the heat exchange;
3) described logic control element reaches the rule of thumb cooling medium addition of data in advance setting according to the high-temperature flue gas entry temperature of temperature detecting unit detection, and the aperture of automatic regulating valve when calculating the equipment initial launch is carried out temperature and just regulated;
4) gas outlet temperature after the heat exchange that detects according to temperature detecting unit of described logic control element; This temperature and the inlet operating temperature that the heat exchanger that presets can bear are compared; Automatic regulating valve aperture to after the first adjusting is adjusted automatically, and control gets into the cooling medium consumption of heat exchanger automatically; Realize that control automatically gets into the inner flue-gas temperature of metallic recuperator.
2. a kind of high-temperature flue gas automatic temperature-control method that is used for metallic recuperator according to claim 1 is characterized in that, carries the pipe outlet of cooling medium that atomizer is installed in the said automatic temperature-control body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011104221071A CN102425976B (en) | 2011-12-15 | 2011-12-15 | Automatic temperature regulating method of high-temperature flue gas for metal heat exchanger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011104221071A CN102425976B (en) | 2011-12-15 | 2011-12-15 | Automatic temperature regulating method of high-temperature flue gas for metal heat exchanger |
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| CN102425976A true CN102425976A (en) | 2012-04-25 |
| CN102425976B CN102425976B (en) | 2013-04-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2011104221071A Active CN102425976B (en) | 2011-12-15 | 2011-12-15 | Automatic temperature regulating method of high-temperature flue gas for metal heat exchanger |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105986068A (en) * | 2014-12-24 | 2016-10-05 | 珠海市钧兴机电有限公司 | Rapid heat conduction steel heat treatment system |
| CN109945732A (en) * | 2019-03-15 | 2019-06-28 | 中国建材国际工程集团有限公司 | Unitized exchanger and its temperature control method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6233215A (en) * | 1985-08-01 | 1987-02-13 | Mitsubishi Heavy Ind Ltd | Gas heater |
| US4842055A (en) * | 1987-08-04 | 1989-06-27 | Kabushiki Kaisha Toshiba | Heat exchanger |
| CN101624525A (en) * | 2008-07-11 | 2010-01-13 | 中冶焦耐工程技术有限公司 | Cold-side adjustment method for temperature and pressure of high temperature flue gas system of heat recovery coke oven |
| CN102252339A (en) * | 2011-05-12 | 2011-11-23 | 华北电力大学（保定） | System for reducing discharge smoke temperature of power station boiler |
-
2011
- 2011-12-15 CN CN2011104221071A patent/CN102425976B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6233215A (en) * | 1985-08-01 | 1987-02-13 | Mitsubishi Heavy Ind Ltd | Gas heater |
| US4842055A (en) * | 1987-08-04 | 1989-06-27 | Kabushiki Kaisha Toshiba | Heat exchanger |
| CN101624525A (en) * | 2008-07-11 | 2010-01-13 | 中冶焦耐工程技术有限公司 | Cold-side adjustment method for temperature and pressure of high temperature flue gas system of heat recovery coke oven |
| CN102252339A (en) * | 2011-05-12 | 2011-11-23 | 华北电力大学（保定） | System for reducing discharge smoke temperature of power station boiler |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105986068A (en) * | 2014-12-24 | 2016-10-05 | 珠海市钧兴机电有限公司 | Rapid heat conduction steel heat treatment system |
| CN109945732A (en) * | 2019-03-15 | 2019-06-28 | 中国建材国际工程集团有限公司 | Unitized exchanger and its temperature control method |
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| Publication number | Publication date |
|---|---|
| CN102425976B (en) | 2013-04-10 |
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