CN103486898A - Automatic safe control device of industrial waste heat recovery system - Google Patents
Automatic safe control device of industrial waste heat recovery system Download PDFInfo
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- CN103486898A CN103486898A CN201310416323.4A CN201310416323A CN103486898A CN 103486898 A CN103486898 A CN 103486898A CN 201310416323 A CN201310416323 A CN 201310416323A CN 103486898 A CN103486898 A CN 103486898A
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Abstract
The invention provides an automatic safe control device of an industrial waste heat recovery system. The automatic safe control device is based on the industrial waste heat recovery system. Temperature sensors are mounted on a heat-pipe-type cooler and are used for measuring the temperature; the port of a condenser is provided with a temperature sensor for measuring the cooling amount of the entire system, and a pressure sensor is mounted on the condenser for measuring the pressure of working fluid inside the system; signals of the sensors are inputted into the control system, and safe and effective utilization of industrial waste can be realized by controlling the number of the working fluid inside the system.
Description
Technical field
The present invention relates to automation field, relate in particular to a kind of automatic safety-control device of industrial afterheat recovery system.
Background technology
Industrial exhaust heat is prevalent in the industries such as electric power, metallurgy, chemical industry, and its boiler tail flue gas contains huge heat, so how the heat in flue gas is taken out and take full advantage of the above-mentioned energy, is one of main research of energy-saving and emission-reduction.High efficient heat exchanging mode in industrial exhaust heat utilization at present mainly comprises following two kinds: heat exchanger direct heat transfer and heat exchange of heat pipe.For heat exchanger direct heat transfer mode, due to be heated material directly and flue gas carry out heat exchange, the temperature difference is larger, easily causes the heat exchanger surface corrosion, has a strong impact on the life-span of heat exchanger.
At present the more waste heat recovery mode of application is heat exchange of heat pipe, because heat pipe is to adopt the principle of Working fluid phase changing to carry out heat exchange, more than the surface temperature that therefore can effectively guarantee heat exchanger maintains the dew-point temperature of flue gas, overcomes the dew point corrosion problem of flue gas.
Yet, in the industrial afterheat recovery system of existing employing heat exchange of heat pipe, due to after the structure of heat exchange of heat pipe determines, its heat exchange amount is difficult to be adjusted according to the heat exchange amount demand of system, and when thermic load generation big ups and downs, heat exchange of heat pipe is inner can explosion even occur the very large thermal stress of generation.
Summary of the invention
(1) technical problem that will solve
In view of above-mentioned technical problem, the invention provides a kind of automatic safety-control device of industrial afterheat recovery system, to promote the security of industrial afterheat recovery system.
(2) technical scheme
A kind of automatic safety-control device of industrial afterheat recovery system is provided according to an aspect of the present invention.This industrial afterheat recovery system comprises: heat pipe type heat exchanger (100); Condenser (200), its steam inlet is connected with the steam (vapor) outlet of heat pipe type heat exchanger (100) by steam pipework, its condensation water outlet is connected to the condensation water entrance of heat pipe type heat exchanger (100) by the liquid back pipe road, its exhaust outlet is communicated to the external world; Water pump (300), it is got the liquid end and is connected to working medium liquid pool (700), and its outlet end is connected to the fluid infusion mouth of condenser.This automatic safety-control device comprises: pressure sensor (601) is arranged in condenser (200), for measuring the inner pressure of condenser (200); Vent valve (603), be magnetic valve, is arranged between described condenser working medium outlet and external environment; Control device (500), be connected to described pressure sensor (601), for carrying out following control flow: when the numerical value of pressure sensor (601) induction surpasses the 3rd threshold value, send instruction steam escape valve (603) is opened.
(3) beneficial effect
From technique scheme, can find out, the automatic safety-control device of industrial afterheat recovery system of the present invention has following beneficial effect:
(1) pressure sensor is set in condenser, when pressure arrives predetermined threshold value, control device sends instruction opens steam escape valve (603), thereby make the pressure in condenser remain on level of security, while having avoided user's thermic load generation big ups and downs, heat exchange of heat pipe is inner can produce very large power pressure and thermal stress, the danger of residual neat recovering system generation explosion;
(2) import and export at condenser 200 is equipped with the heat that temperature sensor reclaims for residual neat recovering system, the quantity of the waste heat recovery amount of contrast residual heat system and user's inner two matter of heat demand amount adjustment System, thereby change the heat exchange amount of whole system, while further having avoided user's thermic load generation big ups and downs, heat exchange of heat pipe is inner can produce very large power pressure and thermal stress, the danger of residual neat recovering system generation explosion;
(2) temperature sensor is installed for the temperature of measuring the heat collector outer surface and the temperature of flue gas in the outside of residual neat recovering system heat collector 100, and control the temperature on residual neat recovering system heat collector surface by control device, guarantee the dew-point temperature of the hull-skin temperature of heat collector higher than flue gas, overcome heat transmission equipment dew point corrosion problem common in existing residual neat recovering system.
The accompanying drawing explanation
The structural representation that Fig. 1 is embodiment of the present invention industrial afterheat recovery system.
[main element symbol description of the present invention]
The 100-heat pipe type heat exchanger; The 200-condenser;
The 300-water pump; 401-the first temperature sensor;
402-the second temperature sensor; The 403-three-temperature sensor;
The 500-control device; The 601-pressure sensor;
The 602-liquid feed valve; The 603-vent valve;
700-working medium liquid pool.
The specific embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, below in conjunction with specific embodiment, and, with reference to accompanying drawing, the present invention is described in more detail.It should be noted that, in accompanying drawing or specification description, similar or identical part is all used identical figure number.The implementation that does not illustrate in accompanying drawing or describe is form known to a person of ordinary skill in the art in affiliated technical field.In addition, although this paper can provide the demonstration of the parameter that comprises particular value, should be appreciated that, parameter is without definitely equaling corresponding value, but can in acceptable error margin or design constraint, be similar to corresponding value.The direction term of mentioning in embodiment, such as " on ", D score, 'fornt', 'back', " left side ", " right side " etc., be only the direction with reference to accompanying drawing.Therefore, the direction term of use is not to be used for limiting the scope of the invention for explanation.
The invention provides a kind of automatic safety-control device of industrial afterheat recovery system.In this automatic safety-control device, on heat collector, mounting temperature sensor is respectively used to measure the temperature on heat collector surface, the heat-obtaining amount of temperature sensor measurement whole system is installed in the import and export of condenser, on condenser, the setting pressure sensor carrys out the pressure of measuring system internal working medium, the signal of the sensor is input to the PLC control system, and in control system, two prime number amounts realize safe, effective utilization of two amateurish heat.
In one exemplary embodiment of the present invention, provide a kind of automatic safety-control device.Please refer to Fig. 1, the industrial afterheat recovery system of this automatic safety-control device based on comprising heat pipe type heat exchanger 100, condenser 200 and water pump 300.
The heat-obtaining plate that heat pipe type heat exchanger 100 is identical by polylith forms, and heat-obtaining plate quantity is determined by needed thermic load.Every heat-obtaining plate surface is with fin as the expansion heat-transfer surface, and expansion has ripple on the heat-transfer surface surface, and the disturbance of surveying for increasing flue gas improves convection transfer rate, increases the heat exchange area on heat-obtaining plate surface simultaneously.The inner surface of heat-obtaining intralamellar part cavity is carved with micro channels for strengthening the heat exchange of heat collector inside.
Water pump 300, it is got the liquid end and is connected to working medium liquid pool 700, and its outlet end is connected to the fluid infusion mouth of condenser 200, for increase the working medium quantity of system heat-obtaining amount replenishment system inside at needs.
Heat pipe type heat exchanger 100 absorbs heat from flue gas, orders about its inner liquid refrigerant and undergoes phase transition, and becomes steam.This steam is delivered to condenser 200 by steam pipework.Condenser 200 utilizes the heat carried in steam to add thermal material, simultaneously, after the steam release heat, is condensed into liquid refrigerant.This liquid refrigerant is back to heat pipe heat collector 100 by the liquid back pipe road.
This automatic safety-control device comprises: sets of temperature sensors, PLC control device 500, pressure sensor 601, liquid feed valve 602 and vent valve 603.Below respectively each part of the present embodiment industrial afterheat recovery system is described in detail.
Sets of temperature sensors, comprise several temperature sensors, and wherein: the first temperature sensor 401 is arranged at the heat pipe type heat exchanger outer surface outside, for surveying the temperature of heat pipe type heat exchanger 100 place environment flue gases; The second temperature sensor 402, be arranged at the outer surface of heat pipe type heat exchanger, for surveying the temperature on heat collector surface; Three-temperature sensor 403, be arranged at the outer surface of condenser outside arrival end, for measuring the temperature of condenser outside arrival end outer surface; Three-temperature sensor 404, be arranged at the outer surface of the condenser outside port of export, for measuring the temperature of condenser outside port of export outer surface;
(1) when the temperature value of the first temperature sensor 401 inductions is greater than the setting first threshold, show that flue-gas temperature is higher, can from flue gas, extract heat, now send instruction water pump 300, liquid feed valve 602, steam escape valve 603 are opened, residual neat recovering system be filled to the distilled water of some.Then send instruction water pump 300 and liquid feed valve 602 are closed, keep steam escape valve 302 in open mode, after incoagulable gas is substantially drained, sends instruction and make steam escape valve 60 close 3.Now system enters the beginning waste heat recovery, and wherein, this first threshold generally is set as 50 ℃;
(2) when the difference of the temperature value of the second temperature sensor 402 induction and flue gas dew point temperature is less than Second Threshold, sending instruction opens steam escape valve 603, reduce the working medium quantity of industrial afterheat recovery internal system, thereby reduce the heat-obtaining amount of system, prevent the dew point corrosion on heat-obtaining heat collector surface, wherein, this Second Threshold generally is set as 10 ℃;
(3) when the difference of the temperature value of the second temperature sensor 402 induction and flue gas dew point temperature is greater than the 3rd threshold value, send instruction water pump 300 and liquid feed valve 602 are opened, increase the quantity of internal system working medium, increase the heat exchange amount of system, wherein, the 3rd threshold value generally is set as 40 ℃;
(4) when pressure sensor 601 induction numerical value while surpassing the 3rd threshold value, send instruction steam escape valve 603 opened, guarantee the safety of system, wherein, the 3rd threshold value generally is set as 80% of maximum pressure value that the industrial afterheat recovery system can bear.
(5) when the temperature difference of three-temperature sensor 403 and the 4th temperature sensor 404 is less than the 4th threshold value, sending instruction opens water pump 300 and liquid feed valve 602, increase the quantity of internal system working medium to increase the heat exchange amount of system, wherein, the 4th threshold value depends on the demand for heat to material in condenser, for example, need to be by material from 50 ℃ of environment temperature heating.
It should be noted that, above-mentioned each control flow does not have proper precedence relationship, wherein according to circumstances selects an execution and gets final product.
So far, by reference to the accompanying drawings the present embodiment be have been described in detail.According to above description, those skilled in the art should have clearly understanding to industrial afterheat recovery system of the present invention.
In addition, the above-mentioned definition to each element is not limited in various concrete structures or the shape of mentioning in embodiment, and those of ordinary skill in the art can replace simply to it with knowing, for example:
(1) the working medium distilled water used in residual neat recovering system at present can also change into other latent heats of vaporization large, be easy to obtain working medium;
(2) the PLC control system can adopt other control system to substitute;
(3) can carry out as required rationally to arrange the value of first threshold, Second Threshold, the 3rd threshold value and the 4th threshold value.
In sum, it is non-adjustable that industrial afterheat recovery system of the present invention has solved the dew point corrosion, the heat exchange amount that exist in existing residual neat recovering system, and the technological deficiency that produces explosion during heat exchange amount generation acute variation, the temperature that can control the heat collector surface prevents lower than dew point, control the heat-obtaining amount by the temperature of measuring flue gas, prevent that system pressure is too high, greatly promoted security and the efficiency of industrial afterheat recovery.
Above-described specific embodiment; purpose of the present invention, technical scheme and beneficial effect are further described; institute is understood that; the foregoing is only specific embodiments of the invention; be not limited to the present invention; within the spirit and principles in the present invention all, any modification of making, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (10)
1. the automatic safety-control device of an industrial afterheat recovery system, this industrial afterheat recovery system comprises:
Heat pipe type heat exchanger (100);
Condenser (200), its steam inlet is connected with the steam (vapor) outlet of heat pipe type heat exchanger (100) by steam pipework, its condensation water outlet is connected to the condensation water entrance of heat pipe type heat exchanger (100) by the liquid back pipe road, its exhaust outlet is communicated to the external world;
Water pump (300), it is got the liquid end and is connected to working medium liquid pool (700), and its outlet end is connected to the fluid infusion mouth of condenser;
It is characterized in that, this automatic safety-control device comprises:
Pressure sensor (601), be arranged in condenser (200), for measuring the inner pressure of condenser (200);
Vent valve (603), be magnetic valve, is arranged between described condenser working medium outlet and external environment;
Control device (500), be connected to described pressure sensor (601), for carrying out following control flow: when the numerical value of pressure sensor (601) induction surpasses the 3rd threshold value, send instruction steam escape valve (603) is opened.
2. automatic safety-control device according to claim 1, is characterized in that, described the 3rd threshold value is 80% of the maximum pressure value that can bear of described industrial afterheat recovery system.
3. automatic safety-control device according to claim 1, is characterized in that, also comprises:
Sets of temperature sensors comprises:
The second temperature sensor (402), be arranged at the outer surface of described heat pipe type heat exchanger (100), for surveying the temperature on heat pipe heat collector (100) surface;
Liquid feed valve (602), be magnetic valve, is arranged between the outlet end and condenser working medium inlet of described water pump;
Described control device (500), be connected to described the second temperature sensor (402), for carrying out following control flow: when the difference of the temperature value of the second temperature sensor (402) induction and flue gas dew point temperature is less than Second Threshold, the transmission instruction is opened steam escape valve (603); Or, when the difference of the temperature value of the second temperature sensor (402) induction and flue gas dew point temperature is greater than the 3rd threshold value, the transmission instruction is opened water pump (300) and liquid feed valve (602).
4. automatic safety-control device according to claim 3, is characterized in that, described Second Threshold is 10 ℃.
5. automatic safety-control device according to claim 3 is characterized in that:
Described sets of temperature sensors also comprises: three-temperature sensor (403) is arranged at the outer surface of condenser outside arrival end, for measuring the temperature of condenser outside arrival end outer surface; The 4th temperature sensor (404), be arranged at the outer surface of the condenser outside port of export, for measuring the temperature of condenser outside port of export outer surface;
Described control device (500), be connected to described the first temperature sensor (401), also for carrying out following control flow: when the temperature difference of three-temperature sensor 403 and the 4th temperature sensor 404 is less than the 4th threshold value, sends instruction water pump (300) and liquid feed valve (602) are opened.
6. automatic safety-control device according to claim 5, is characterized in that, described the 4th threshold value depends on the demand for heat to material in condenser.
7. automatic safety-control device according to claim 5 is characterized in that:
Described sets of temperature sensors also comprises: the first temperature sensor (401) is arranged at the heat pipe type heat exchanger outer surface outside, for surveying the temperature of heat pipe type heat exchanger 100 place environment flue gases;
Described control device (500), be connected to described the first temperature sensor (401), for carrying out following control flow: when the temperature value of the first temperature sensor (401) induction is greater than the setting first threshold, sends instruction water pump (300), liquid feed valve (602) and steam escape valve (603) are opened; Then send instruction water pump (300) and liquid feed valve (602) are closed, keep steam escape valve (302) in open mode, after incoagulable gas is substantially drained, sends instruction steam escape valve (603) cuts out.
8. automatic safety-control device according to claim 7, is characterized in that, described first threshold is 50 ℃.
9. according to the described automatic safety-control device of any one in claim 1 to 8, it is characterized in that:
The heat-obtaining plate that described heat pipe type heat exchanger (100) is identical by polylith forms, and every heat-obtaining plate surface is with fin as the expansion heat-transfer surface, and expansion has ripple on the heat-transfer surface surface.
10. according to the described automatic safety-control device of any one in claim 1 to 8, it is characterized in that: described working medium is distilled water.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310416323.4A CN103486898B (en) | 2013-09-13 | 2013-09-13 | The automatic safety-control device of industrial afterheat recovery system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310416323.4A CN103486898B (en) | 2013-09-13 | 2013-09-13 | The automatic safety-control device of industrial afterheat recovery system |
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| CN103486898A true CN103486898A (en) | 2014-01-01 |
| CN103486898B CN103486898B (en) | 2015-10-21 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104728826A (en) * | 2015-03-19 | 2015-06-24 | 中国华能集团清洁能源技术研究院有限公司 | Constant temperature economizer |
| CN105806111A (en) * | 2014-12-31 | 2016-07-27 | 亚申科技研发中心（上海）有限公司 | Heat exchange system based on super thermal conductance principle |
| CN109341388A (en) * | 2018-12-20 | 2019-02-15 | 江苏广旭热管科技有限公司 | The plate type heat exchanger with pulsating heat pipes of two-direction heat-exchanging |
| CN115557553A (en) * | 2022-09-26 | 2023-01-03 | 杭州清源再生物资利用有限公司 | Tank body for recovering waste heat of industrial wastewater |
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| JPH0821698A (en) * | 1994-04-07 | 1996-01-23 | Tetsuji Yoshinaga | Exhaust heat recovering apparatus with circulating circuit |
| CN2716761Y (en) * | 2004-04-02 | 2005-08-10 | 天津力源永春科技发展有限公司 | Intellectualized controller for heat exchanging machine set |
| CN201314797Y (en) * | 2008-12-03 | 2009-09-23 | 沈阳铝镁设计研究院 | Waste heat recovery device and control system thereof |
| JP2012207833A (en) * | 2011-03-29 | 2012-10-25 | Kurita Water Ind Ltd | Method of estimating cleaning effect of cooling water line in refrigerating system |
| CN103016137A (en) * | 2011-09-21 | 2013-04-03 | 株式会社丰田自动织机 | Waste heat recovery system |
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2013
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0821698A (en) * | 1994-04-07 | 1996-01-23 | Tetsuji Yoshinaga | Exhaust heat recovering apparatus with circulating circuit |
| CN2716761Y (en) * | 2004-04-02 | 2005-08-10 | 天津力源永春科技发展有限公司 | Intellectualized controller for heat exchanging machine set |
| CN201314797Y (en) * | 2008-12-03 | 2009-09-23 | 沈阳铝镁设计研究院 | Waste heat recovery device and control system thereof |
| JP2012207833A (en) * | 2011-03-29 | 2012-10-25 | Kurita Water Ind Ltd | Method of estimating cleaning effect of cooling water line in refrigerating system |
| CN103016137A (en) * | 2011-09-21 | 2013-04-03 | 株式会社丰田自动织机 | Waste heat recovery system |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105806111A (en) * | 2014-12-31 | 2016-07-27 | 亚申科技研发中心（上海）有限公司 | Heat exchange system based on super thermal conductance principle |
| CN104728826A (en) * | 2015-03-19 | 2015-06-24 | 中国华能集团清洁能源技术研究院有限公司 | Constant temperature economizer |
| CN109341388A (en) * | 2018-12-20 | 2019-02-15 | 江苏广旭热管科技有限公司 | The plate type heat exchanger with pulsating heat pipes of two-direction heat-exchanging |
| CN115557553A (en) * | 2022-09-26 | 2023-01-03 | 杭州清源再生物资利用有限公司 | Tank body for recovering waste heat of industrial wastewater |
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| CN103486898B (en) | 2015-10-21 |
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