CN109925841B - Energy-efficient organic waste gas purification system - Google Patents
Energy-efficient organic waste gas purification system Download PDFInfo
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Abstract
The invention relates to a high-efficiency energy-saving organic waste gas purification system, which comprises a waste gas collecting pipeline, an exhaust smoke window, a high-temperature gas-gas heat exchanger, a high-temperature furnace, a primary water-gas heat exchanger and an exhaust fan, wherein the high-temperature gas-gas heat exchanger is arranged between the waste gas collecting pipeline and the exhaust smoke window, the high-temperature gas-gas heat exchanger comprises a low-temperature gas channel and a high-temperature gas channel, organic waste gas in the waste gas collecting pipeline enters the low-temperature gas channel, exchanges heat with high-temperature gas in the high-temperature gas channel to heat and raise temperature, and enters the high-temperature furnace through the high-temperature pipeline after primary decomposition, the organic waste gas is continuously decomposed into carbon dioxide and water for the second time in the high-temperature furnace, high-temperature purified gas generated by the decomposition and heat release of the organic waste gas in the high-. The invention has the advantages of high heat exchange efficiency, good high temperature resistance effect, good waste gas decomposition and purification, high utilization rate of waste gas decomposition heat energy, long service life and the like.
Description
Technical Field
The invention relates to the technical field of workshop organic waste gas treatment in the printing field, in particular to a high-efficiency energy-saving organic waste gas purification system.
Background
In the printing industry, materials such as organic solvents, films, paper, ink and the like are adopted for printing, and the materials are treated in the process
Especially, the drying process generates a large amount of organic waste gas. To prevent the organic waste gas from polluting the environment, it is obviously necessary to
The exhaust gas can be discharged after being treated. With the increasing emphasis on environmental protection in China, the more the requirement on organic waste gas treatment
The higher. The existing modes of plasma, activated carbon adsorption, RPO ceramic adsorption and desorption heat treatment and the like have the problems of low treatment efficiency, low purification degree, high treatment cost and the like.
Disclosure of Invention
In order to solve the technical problems, the invention provides the high-efficiency energy-saving organic waste gas purification system which has high heat exchange efficiency, good high-temperature resistant effect, good waste gas decomposition and purification, high waste gas decomposition heat energy utilization rate and long service life.
In order to achieve the above purpose, the following technical solutions are provided.
The utility model provides an energy-efficient organic waste gas purification system, is including the waste gas collection pipeline that is used for collecting workshop organic waste gas and the emission smoke window that is used for the purified gas of discharge system purification back, still includes high temperature gas heat exchanger, high-temperature furnace, one-level aqueous vapor heat exchanger and exhaust fan. The high-temperature gas-gas heat exchanger, the high-temperature furnace, the primary gas-gas heat exchanger and the exhaust fan are arranged between the waste gas collecting pipeline and the exhaust smoke window. The high-temperature gas-gas heat exchanger comprises a low-temperature gas channel and a high-temperature gas channel, wherein low-temperature organic waste gas in the waste gas collecting pipeline enters the low-temperature gas channel of the high-temperature gas-gas heat exchanger, exchanges heat with high-temperature gas in the high-temperature gas channel in the high-temperature gas-gas heat exchanger to heat, is primarily decomposed in the high-temperature gas-gas heat exchanger, is heated through heat exchange of the high-temperature gas-gas heat exchanger, and is primarily decomposed into organic waste gas, the organic waste gas is continuously decomposed secondarily in the high-temperature furnace to be thoroughly decomposed into carbon dioxide and water, a communication port communicated with the high-temperature gas channel of the high-temperature gas-gas heat exchanger is arranged on the high-temperature furnace, high-temperature purified gas generated by heat release of decomposition of the organic waste gas in the high-temperature furnace enters the high-temperature gas channel in the high-temperature gas-gas heat exchanger through the communication port, finally, the smoke enters the smoke discharge window to be discharged. According to the efficient energy-saving organic waste gas purification system, the high-temperature gas-gas heat exchanger, the high-temperature furnace, the primary water-gas heat exchanger, the exhaust fan and the exhaust smoke window are arranged, so that organic waste gas generated in a workshop and collected in the waste gas collection pipeline is subjected to heat exchange and temperature rise in the high-temperature gas-gas heat exchanger, and primary decomposition is realized, namely the organic waste gas is incompletely decomposed once in the high-temperature gas-gas heat exchanger; organic waste gas after primary decomposition is conveyed into the high-temperature furnace through the high-temperature pipeline and is continuously decomposed in the high-temperature furnace, secondary complete decomposition is achieved, organic waste gas after secondary complete decomposition in the high-temperature furnace is thoroughly converted into water and carbon dioxide and emits a large amount of heat, high-temperature purified gas is formed in the high-temperature furnace, the high-temperature purified gas in the high-temperature furnace enters the high-temperature gas-gas heat exchanger through a communication port communicated with the high-temperature gas-gas heat exchanger and is used for circularly heating the organic waste gas entering the high-temperature gas-gas heat exchanger, and the heat utilization rate in the high-temperature furnace and the heat exchange effect of the high-temperature gas. The high-temperature purified gas enters the first-stage water-gas heat exchanger after being subjected to heat exchange and cooling through the high-temperature gas-gas heat exchanger, is subjected to water-gas heat exchange with the first-stage water-gas heat exchanger, is continuously subjected to heat exchange and cooling, and is exhausted to the exhaust smoke window through the exhaust fan.
Further, organic waste gas is imported to the high temperature gas heat exchanger through the draught fan, the draught fan is arranged at the front end of the waste gas collecting pipeline, organic waste gas in a workshop is collected to the waste gas collecting pipeline through the draught fan and is imported to the high temperature gas heat exchanger, and the organic waste gas is convenient to collect.
Furthermore, the heat exchange tube of the high-temperature gas-gas heat exchanger is a multi-head spiral heat exchange tube, and the multi-head spiral heat exchange tube is made of high-temperature-resistant stainless steel. The setting of bull spiral heat exchange tube to the material of equal quality, intersects in ordinary heat exchange tube, the heat transfer area of effective increase, specifically, the heat transfer area of spiral heat exchange tube increases to original 1.3 times, and then effectively promotes heat exchange efficiency. The multi-head spiral heat exchange tube is made of high-temperature-resistant stainless steel, the high-temperature-resistant stainless steel can normally work at 1000 ℃, the service life is long, and the service life of the whole high-temperature gas-gas heat exchanger is prolonged.
Further, the high-temperature gas-gas heat exchanger is a gas-gas heat exchanger which heats the organic waste gas with the temperature of 50 +/-10 ℃ at the inlet to 700 +/-50 ℃ from low temperature through the high-temperature gas-gas heat exchanger, the organic waste gas is primarily decomposed in the high-temperature gas-gas heat exchanger for one time, and the organic waste gas after primary decomposition enters the high-temperature furnace through a high-temperature pipeline. The organic waste gas is subjected to heat exchange with high-temperature gas in the high-temperature furnace through the high-temperature gas-gas heat exchanger, the temperature of the organic waste gas is directly raised to about 700 ℃, the temperature of the organic waste gas is greatly close to the temperature of 800 ℃ required for complete decomposition of the organic waste gas, the organic waste gas is preliminarily decomposed in the high-temperature gas-gas heat exchanger, the heat exchange efficiency is effectively improved, the realization of energy conservation and emission reduction is facilitated, and the enterprise operation cost is reduced.
Furthermore, the high-efficiency energy-saving organic waste gas purification system also comprises a temperature control system, wherein the temperature control system is connected with a high-temperature furnace, and honeycomb ceramics with a heat storage function are arranged in the high-temperature furnace. The arrangement of the honeycomb ceramics effectively prolongs the time for the organic waste gas to pass through, so that the organic waste gas can be fully decomposed.
Further, the temperature in the high-temperature furnace is controlled to be 800 +/-50 ℃ by a temperature control system, organic waste gas is decomposed for the second time after entering the high-temperature furnace, and the organic waste gas is thoroughly decomposed into carbon dioxide and water in the high-temperature furnace and releases a large amount of heat. The high-temperature purified gas in the high-temperature furnace is cooled to 200 +/-10 ℃ after heat exchange through the high-temperature gas-gas heat exchanger, specifically, the high-temperature purified gas in the high-temperature furnace enters the high-temperature gas-gas heat exchanger through a high-temperature gas input end of the high-temperature gas-gas heat exchanger, organic waste gas in the high-temperature gas-gas heat exchanger is preheated, and the temperature of the purified gas output from the high-temperature gas-gas heat exchanger is about 200 ℃ after heat exchange.
Furthermore, the high-efficiency energy-saving organic waste gas purification system also comprises high-temperature hot water equipment, wherein the high-temperature hot water equipment comprises a primary water inlet and a primary water outlet, the primary water-gas heat exchanger comprises a primary purified gas channel and a primary hot water channel, purified gas at about 200 ℃ output by the high-temperature water-gas heat exchanger enters the primary purified gas channel of the primary water-gas heat exchanger, water in the high-temperature hot water equipment flows out of the primary water outlet and enters the primary hot water channel, the water returns to the high-temperature hot water equipment from the primary water inlet after heat exchange, and the temperature of the heated water in the high-temperature hot water equipment is above 90 ℃. The hot water with the temperature of more than 90 ℃ obtained after the heat exchange of the primary water-gas heat exchanger can be used for supplying heat for printing and compounding machines in workshops, and can also be used for central heating in cold weather in the north. The arrangement of the high-temperature hot water equipment is beneficial to the heat recovery of the primary water-gas heat exchanger, and the heat recovery utilization rate is improved.
Furthermore, the high-efficiency energy-saving organic waste gas purification system also comprises a secondary water-gas heat exchanger, wherein the secondary water-gas heat exchanger is arranged on the exhaust smoke window and comprises a secondary purified gas channel and a secondary hot water channel, normal-temperature tap water enters a secondary water inlet of the secondary water-gas heat exchanger, the water temperature at a secondary outlet of the secondary water-gas heat exchanger is 50-80 ℃, an inlet of the secondary purified gas channel of the secondary water-gas heat exchanger is communicated with an outlet of a primary purified gas channel of the primary water-gas heat exchanger, and purified gas after heat exchange and temperature reduction through the primary water-gas heat exchanger enters the secondary purified gas channel through an exhaust fan and is exhausted through the exhaust smoke window after heat exchange with water in the secondary hot water channel. The temperature of the hot water prepared by the secondary water-gas heat exchanger is 50-80 ℃, and the hot water can be used for supplying hot water to dormitories and kitchens and can also be used for central heating in cold weather in the north.
Compared with the prior art, the high-efficiency energy-saving organic waste gas purification system has the following beneficial effects:
firstly, the waste gas decomposition and purification effect is good, the high-efficiency energy-saving organic waste gas purification system preheats the organic waste gas in a high-temperature gas-gas heat exchanger to decompose the organic waste gas primarily, then the organic waste gas is conveyed into a high-temperature furnace through a high-temperature pipeline and is decomposed continuously in the high-temperature furnace to realize secondary complete decomposition, the organic waste gas after secondary complete decomposition in the high-temperature furnace is completely converted into water and carbon dioxide, and the organic waste gas treatment efficiency of the high-efficiency energy-saving organic waste gas purification system is more than 99.5 percent.
Secondly, the heat exchange efficiency is high, on one hand, organic waste gas is continuously decomposed in the high-temperature furnace, secondary complete decomposition is realized, the organic waste gas after secondary complete decomposition in the high-temperature furnace is completely converted into water and carbon dioxide, simultaneously, a large amount of heat is released, and the generated high-temperature gas enters the organic waste gas in the high-temperature gas-gas heat exchanger to be circularly heated, so that the heat utilization rate in the high-temperature furnace and the heat exchange effect of the high-temperature gas-gas heat exchanger are effectively improved; on the other hand, the setting of bull spiral heat exchange tube in the high temperature gas heat exchanger to the material of equal quality, intersects in ordinary heat exchange tube, the heat transfer area of effective increase, specifically, the heat transfer area increase of spiral heat exchange tube to original 1.3 times, and then effectively promotes heat exchange efficiency.
Third, high temperature resistant effectual, long service life, the bull spiral heat exchange tube adopts high temperature resistant stainless steel to make in the high temperature gas heat exchanger, and high temperature resistant stainless steel can normally work under 1000 ℃, long service life, and then promotes the life of whole high temperature gas heat exchanger.
Fourthly, the heat utilization rate is high, the high-temperature gas in the high-temperature furnace enters the high-temperature gas-gas heat exchanger to circularly heat and exchange the organic waste gas, and the heat released by the organic waste gas in the high-temperature furnace is effectively utilized; the high-temperature hot water equipment and the secondary water-gas heat exchanger are respectively used for recovering and utilizing the heat energy of the primary water-gas heat exchanger, and the heat energy recovery utilization rate of the system is effectively improved.
Drawings
FIG. 1 is a block diagram of an energy-efficient organic waste gas purification system according to the present invention.
Detailed Description
The energy-efficient organic waste gas purification system and the massage control method according to the present invention will be described in further detail with reference to the following embodiments and accompanying drawings.
Example 1
The invention provides a high-efficiency energy-saving organic waste gas purification system, which selects methanol as a fuel for a printing workshop in a natural gas-free area. The high-temperature gas-gas heat exchanger, the high-temperature furnace, the primary gas-gas heat exchanger and the exhaust fan are arranged between the waste gas collecting pipeline and the exhaust smoke window. The high-temperature gas-gas heat exchanger comprises a low-temperature gas channel and a high-temperature gas channel, wherein low-temperature organic waste gas in the waste gas collecting pipeline enters the low-temperature gas channel of the high-temperature gas-gas heat exchanger, exchanges heat with high-temperature gas in the high-temperature gas channel in the high-temperature gas-gas heat exchanger to heat, is primarily decomposed in the high-temperature gas-gas heat exchanger, is heated through heat exchange of the high-temperature gas-gas heat exchanger, and is primarily decomposed into organic waste gas, the organic waste gas is continuously decomposed secondarily in the high-temperature furnace to be thoroughly decomposed into carbon dioxide and water, a communication port communicated with the high-temperature gas channel of the high-temperature gas-gas heat exchanger is arranged on the high-temperature furnace, high-temperature purified gas generated by heat release of decomposition of the organic waste gas in the high-temperature furnace enters the high-temperature gas channel in the high-temperature gas-gas heat exchanger through the communication port, finally, the smoke enters the smoke discharge window to be discharged. According to the efficient energy-saving organic waste gas purification system, the high-temperature gas-gas heat exchanger, the high-temperature furnace, the primary water-gas heat exchanger, the exhaust fan and the exhaust smoke window are arranged, so that organic waste gas generated in a workshop and collected in the waste gas collection pipeline is subjected to heat exchange and temperature rise in the high-temperature gas-gas heat exchanger, and primary decomposition is realized, namely the organic waste gas is incompletely decomposed once in the high-temperature gas-gas heat exchanger; organic waste gas after primary decomposition is conveyed into the high-temperature furnace through the high-temperature pipeline and is continuously decomposed in the high-temperature furnace, secondary complete decomposition is achieved, organic waste gas after secondary complete decomposition in the high-temperature furnace is thoroughly converted into water and carbon dioxide and emits a large amount of heat, high-temperature purified gas is formed in the high-temperature furnace, the high-temperature purified gas in the high-temperature furnace enters the high-temperature gas-gas heat exchanger through a communication port communicated with the high-temperature gas-gas heat exchanger and is used for circularly heating the organic waste gas entering the high-temperature gas-gas heat exchanger, and the heat utilization rate in the high-temperature furnace and the heat exchange effect of the high-temperature gas. The high-temperature purified gas enters the first-stage water-gas heat exchanger after being subjected to heat exchange and cooling through the high-temperature gas-gas heat exchanger, is subjected to water-gas heat exchange with the first-stage water-gas heat exchanger, is continuously subjected to heat exchange and cooling, and is exhausted to the exhaust smoke window through the exhaust fan.
Referring to fig. 1, organic waste gas is imported into the high-temperature gas-gas heat exchanger after passing through the induced draft fan, the induced draft fan is arranged at the front end of the waste gas collecting pipeline, organic waste gas in a workshop is collected into the waste gas collecting pipeline through the induced draft fan and is imported into the high-temperature gas-gas heat exchanger, and the organic waste gas is convenient to collect.
Referring to fig. 1, the heat exchange tube in the high-temperature gas-gas heat exchanger is a multi-head spiral heat exchange tube, and the multi-head spiral heat exchange tube is made of high-temperature resistant stainless steel. The setting of bull spiral heat exchange tube to the material of equal quality, intersects in ordinary heat exchange tube, the heat transfer area of effective increase, specifically, the heat transfer area of spiral heat exchange tube increases to original 1.3 times, and then effectively promotes heat exchange efficiency. The multi-head spiral heat exchange tube is made of high-temperature-resistant stainless steel, the high-temperature-resistant stainless steel can normally work at 1000 ℃, the service life is long, and the service life of the whole high-temperature gas-gas heat exchanger is prolonged.
Referring to fig. 1, the high temperature gas-gas heat exchanger is a gas-gas heat exchanger which heats the organic waste gas at 40 ℃ at the inlet to 650 ℃ from low temperature through the high temperature gas-gas heat exchanger, the organic waste gas is primarily decomposed in the high temperature gas-gas heat exchanger, and the organic waste gas after primary decomposition enters the high temperature furnace through the high temperature pipeline. The organic waste gas is subjected to heat exchange with high-temperature gas in the high-temperature furnace through the high-temperature gas-gas heat exchanger, the temperature of the organic waste gas is directly raised to nearly 700 ℃, the temperature of the organic waste gas is greatly close to 800 ℃ required by complete decomposition of the organic waste gas, the organic waste gas is preliminarily decomposed in the high-temperature gas-gas heat exchanger, the heat exchange efficiency is effectively improved, the energy conservation and emission reduction are facilitated, and the enterprise operation cost is reduced.
Referring to fig. 1, the high-efficiency energy-saving organic waste gas purification system of the present invention further comprises a temperature control system, wherein the temperature control system is connected with a high temperature furnace, and honeycomb ceramics with a heat storage function are arranged in the high temperature furnace. The arrangement of the honeycomb ceramics effectively prolongs the time for the organic waste gas to pass through, so that the organic waste gas can be fully decomposed. The temperature in the high-temperature furnace is controlled at 750 ℃ by a temperature control system, organic waste gas is decomposed for the second time after entering the high-temperature furnace, and the organic waste gas is thoroughly decomposed into carbon dioxide and water in the high-temperature furnace and releases a large amount of heat. The high-temperature purified gas in the high-temperature furnace is cooled to 190 ℃ after heat exchange through the high-temperature gas-gas heat exchanger, specifically, the high-temperature purified gas in the high-temperature furnace enters the high-temperature gas-gas heat exchanger through a high-temperature gas input end of the high-temperature gas-gas heat exchanger, organic waste gas in the high-temperature gas-gas heat exchanger is preheated, and the temperature of the purified gas output from the high-temperature gas-gas heat exchanger is about 200 ℃ after heat exchange. The high-efficiency energy-saving organic waste gas purification system also comprises high-temperature hot water equipment, wherein the high-temperature hot water equipment comprises a primary water inlet and a primary water outlet, the primary water-gas heat exchanger comprises a primary purified gas channel and a primary hot water channel, purified gas at about 200 ℃ output by the high-temperature gas-gas heat exchanger enters the primary purified gas channel of the primary water-gas heat exchanger, water in the high-temperature hot water equipment flows out of the primary water outlet and enters the primary hot water channel, the water returns to the high-temperature hot water equipment from the primary water inlet after heat exchange, and the temperature of the heated water in the high-temperature hot water equipment is above. The hot water with the temperature of over 90 ℃ obtained after the heat exchange of the primary water-gas heat exchanger can be used for supplying heat for printing and compounding machines in workshops, can also be used for central heating in northern cold weather, and can also be used as a heat source of a lithium bromide absorption refrigerator to drive a central air conditioner. The arrangement of the high-temperature hot water equipment is beneficial to the heat recovery of the primary water-gas heat exchanger, and the heat recovery utilization rate is improved. The high-efficiency energy-saving organic waste gas purification system also comprises a secondary water-gas heat exchanger, wherein the secondary water-gas heat exchanger is arranged on the exhaust smoke window and comprises a secondary gas purification channel and a secondary hot water channel, normal-temperature tap water enters a secondary water inlet of the secondary water-gas heat exchanger, the water temperature at a secondary outlet of the secondary water-gas heat exchanger is 50 ℃, an inlet of the secondary gas purification channel of the secondary water-gas heat exchanger is communicated with an outlet of the primary gas purification channel of the primary water-gas heat exchanger, purified gas subjected to heat exchange and temperature reduction by the primary water-gas heat exchanger enters the secondary gas purification channel through an exhaust fan, and is subjected to heat exchange with water in the secondary hot water channel and then is exhausted through. The temperature of the hot water prepared by the secondary water-gas heat exchanger is 50 ℃, the hot water can be used for supplying hot water for dormitories and kitchens, can also be used for central heating in northern cold weather, and can also be used as a heat source of a lithium bromide absorption refrigerator to drive a central air conditioner.
Example 2
In areas without natural gas, methanol is selected as the fuel for the printing workshop in the embodiment 1, and in this case, the fuel can also be selected from other alcohol-based fuels besides the methanol in the embodiment 1.
The embodiment selects ethanol as fuel, and the invention provides a high-efficiency energy-saving organic waste gas purification system which comprises a waste gas collecting pipeline for collecting organic waste gas generated by workshop combustion, an exhaust smoke window for exhausting purified gas purified by the system, a high-temperature gas-gas heat exchanger, a high-temperature furnace, a primary water-gas heat exchanger and an exhaust fan. The high-temperature gas-gas heat exchanger, the high-temperature furnace, the primary gas-gas heat exchanger and the exhaust fan are arranged between the waste gas collecting pipeline and the exhaust smoke window. The high-temperature gas-gas heat exchanger comprises a low-temperature gas channel and a high-temperature gas channel, wherein low-temperature organic waste gas in the waste gas collecting pipeline enters the low-temperature gas channel of the high-temperature gas-gas heat exchanger, exchanges heat with high-temperature gas in the high-temperature gas channel in the high-temperature gas-gas heat exchanger to heat, is primarily decomposed in the high-temperature gas-gas heat exchanger, is heated through heat exchange of the high-temperature gas-gas heat exchanger, and is primarily decomposed into organic waste gas, the organic waste gas is continuously decomposed secondarily in the high-temperature furnace to be thoroughly decomposed into carbon dioxide and water, a communication port communicated with the high-temperature gas channel of the high-temperature gas-gas heat exchanger is arranged on the high-temperature furnace, high-temperature purified gas generated by heat release of decomposition of the organic waste gas in the high-temperature furnace enters the high-temperature gas channel in the high-temperature gas-gas heat exchanger through the communication port, finally, the smoke enters the smoke discharge window to be discharged. According to the efficient energy-saving organic waste gas purification system, the high-temperature gas-gas heat exchanger, the high-temperature furnace, the primary water-gas heat exchanger, the exhaust fan and the exhaust smoke window are arranged, so that organic waste gas generated in a workshop and collected in the waste gas collection pipeline is subjected to heat exchange and temperature rise in the high-temperature gas-gas heat exchanger, and primary decomposition is realized, namely the organic waste gas is incompletely decomposed once in the high-temperature gas-gas heat exchanger; organic waste gas after primary decomposition is conveyed into the high-temperature furnace through the high-temperature pipeline and is continuously decomposed in the high-temperature furnace, secondary complete decomposition is achieved, organic waste gas after secondary complete decomposition in the high-temperature furnace is thoroughly converted into water and carbon dioxide and emits a large amount of heat, high-temperature purified gas is formed in the high-temperature furnace, the high-temperature purified gas in the high-temperature furnace enters the high-temperature gas-gas heat exchanger through a communication port communicated with the high-temperature gas-gas heat exchanger and is used for circularly heating the organic waste gas entering the high-temperature gas-gas heat exchanger, and the heat utilization rate in the high-temperature furnace and the heat exchange effect of the high-temperature gas. The high-temperature purified gas enters the first-stage water-gas heat exchanger after being subjected to heat exchange and cooling through the high-temperature gas-gas heat exchanger, is subjected to water-gas heat exchange with the first-stage water-gas heat exchanger, is continuously subjected to heat exchange and cooling, and is exhausted to the exhaust smoke window through the exhaust fan.
Referring to fig. 1, organic waste gas is imported into the high-temperature gas-gas heat exchanger after passing through the induced draft fan, the induced draft fan is arranged at the front end of the waste gas collecting pipeline, organic waste gas in a workshop is collected into the waste gas collecting pipeline through the induced draft fan and is imported into the high-temperature gas-gas heat exchanger, and the organic waste gas is convenient to collect.
Referring to fig. 1, the heat exchange tube in the high-temperature gas-gas heat exchanger is a multi-head spiral heat exchange tube, and the multi-head spiral heat exchange tube is made of high-temperature resistant stainless steel. The setting of bull spiral heat exchange tube to the material of equal quality, intersects in ordinary heat exchange tube, the heat transfer area of effective increase, specifically, the heat transfer area of spiral heat exchange tube increases to original 1.3 times, and then effectively promotes heat exchange efficiency. The multi-head spiral heat exchange tube is made of high-temperature-resistant stainless steel, the high-temperature-resistant stainless steel can normally work at 1000 ℃, the service life is long, and the service life of the whole high-temperature gas-gas heat exchanger is prolonged.
Referring to fig. 1, the high temperature gas-gas heat exchanger is a gas-gas heat exchanger which heats the organic waste gas at the inlet of 50 ℃ from low temperature to 700 ℃ after passing through the high temperature gas-gas heat exchanger, the organic waste gas is primarily decomposed in the high temperature gas-gas heat exchanger, and the organic waste gas after primary decomposition enters the high temperature furnace through the high temperature pipeline. The organic waste gas is subjected to heat exchange with high-temperature gas in the high-temperature furnace through the high-temperature gas-gas heat exchanger, the temperature of the organic waste gas is directly raised to 700 ℃, the temperature of the organic waste gas is greatly close to the temperature of 800 ℃ required for complete decomposition of the organic waste gas, the organic waste gas is preliminarily decomposed in the high-temperature gas-gas heat exchanger, the heat exchange efficiency is effectively improved, the energy conservation and emission reduction are favorably realized, and the enterprise operation cost is reduced.
Referring to fig. 1, the high-efficiency energy-saving organic waste gas purification system of the present invention further comprises a temperature control system, wherein the temperature control system is connected with a high temperature furnace, and honeycomb ceramics with a heat storage function are arranged in the high temperature furnace. The arrangement of the honeycomb ceramics effectively prolongs the time for the organic waste gas to pass through, so that the organic waste gas can be fully decomposed. The temperature in the high-temperature furnace is controlled to be 800 ℃ by a temperature control system, organic waste gas is decomposed for the second time after entering the high-temperature furnace, and the organic waste gas is thoroughly decomposed into carbon dioxide and water in the high-temperature furnace and releases a large amount of heat. The high-temperature purified gas in the high-temperature furnace is cooled to 200 ℃ after heat exchange through the high-temperature gas-gas heat exchanger, and specifically, the high-temperature purified gas in the high-temperature furnace enters the high-temperature gas-gas heat exchanger through a high-temperature gas input end of the high-temperature gas-gas heat exchanger, organic waste gas in the high-temperature gas-gas heat exchanger is preheated, and the temperature of the purified gas output from the high-temperature gas-gas heat exchanger is about 200 ℃ after heat exchange. The high-efficiency energy-saving organic waste gas purification system also comprises high-temperature hot water equipment, wherein the high-temperature hot water equipment comprises a primary water inlet and a primary water outlet, the primary water-gas heat exchanger comprises a primary purified gas channel and a primary hot water channel, purified gas at about 200 ℃ output by the high-temperature gas-gas heat exchanger enters the primary purified gas channel of the primary water-gas heat exchanger, water in the high-temperature hot water equipment flows out of the primary water outlet and enters the primary hot water channel, the water returns to the high-temperature hot water equipment from the primary water inlet after heat exchange, and the temperature of the heated water in the high-temperature hot water equipment is above. The hot water with the temperature of over 90 ℃ obtained after the heat exchange of the primary water-gas heat exchanger can be used for supplying heat for printing and compounding machines in workshops, can also be used for central heating in northern cold weather, and can also be used as a heat source of a lithium bromide absorption refrigerator to drive a central air conditioner. The arrangement of the high-temperature hot water equipment is beneficial to the heat recovery of the primary water-gas heat exchanger, and the heat recovery utilization rate is improved. The high-efficiency energy-saving organic waste gas purification system also comprises a secondary water-gas heat exchanger, wherein the secondary water-gas heat exchanger is arranged on the exhaust smoke window and comprises a secondary gas purification channel and a secondary hot water channel, normal-temperature tap water enters a secondary water inlet of the secondary water-gas heat exchanger, the water temperature at a secondary outlet of the secondary water-gas heat exchanger is 50 ℃, an inlet of the secondary gas purification channel of the secondary water-gas heat exchanger is communicated with an outlet of the primary gas purification channel of the primary water-gas heat exchanger, purified gas subjected to heat exchange and temperature reduction by the primary water-gas heat exchanger enters the secondary gas purification channel through an exhaust fan, and is subjected to heat exchange with water in the secondary hot water channel and then is exhausted through. The temperature of the hot water prepared by the secondary water-gas heat exchanger is 70 ℃, the hot water can be used for supplying hot water for dormitories and kitchens, can also be used for central heating in northern cold weather, and can also be used as a heat source of a lithium bromide absorption refrigerator to drive a central air conditioner.
Example 3
The invention provides a high-efficiency energy-saving organic waste gas purification system, which selects natural gas as fuel for a printing workshop in a region with natural gas, and comprises a waste gas collecting pipeline for collecting organic waste gas generated by workshop combustion, an exhaust smoke window for exhausting purified gas purified by the system, a high-temperature gas-gas heat exchanger, a high-temperature furnace, a primary water-gas heat exchanger and an exhaust fan. The high-temperature gas-gas heat exchanger, the high-temperature furnace, the primary gas-gas heat exchanger and the exhaust fan are arranged between the waste gas collecting pipeline and the exhaust smoke window. The high-temperature gas-gas heat exchanger comprises a low-temperature gas channel and a high-temperature gas channel, wherein low-temperature organic waste gas in the waste gas collecting pipeline enters the low-temperature gas channel of the high-temperature gas-gas heat exchanger, exchanges heat with high-temperature gas in the high-temperature gas channel in the high-temperature gas-gas heat exchanger to heat, is primarily decomposed in the high-temperature gas-gas heat exchanger, is heated through heat exchange of the high-temperature gas-gas heat exchanger, and is primarily decomposed into organic waste gas, the organic waste gas is continuously decomposed secondarily in the high-temperature furnace to be thoroughly decomposed into carbon dioxide and water, a communication port communicated with the high-temperature gas channel of the high-temperature gas-gas heat exchanger is arranged on the high-temperature furnace, high-temperature purified gas generated by heat release of decomposition of the organic waste gas in the high-temperature furnace enters the high-temperature gas channel in the high-temperature gas-gas heat exchanger through the communication port, finally, the smoke enters the smoke discharge window to be discharged. According to the efficient energy-saving organic waste gas purification system, the high-temperature gas-gas heat exchanger, the high-temperature furnace, the primary water-gas heat exchanger, the exhaust fan and the exhaust smoke window are arranged, so that organic waste gas generated in a workshop and collected in the waste gas collection pipeline is subjected to heat exchange and temperature rise in the high-temperature gas-gas heat exchanger, and primary decomposition is realized, namely the organic waste gas is incompletely decomposed once in the high-temperature gas-gas heat exchanger; organic waste gas after primary decomposition is conveyed into the high-temperature furnace through the high-temperature pipeline and is continuously decomposed in the high-temperature furnace, secondary complete decomposition is achieved, organic waste gas after secondary complete decomposition in the high-temperature furnace is thoroughly converted into water and carbon dioxide and emits a large amount of heat, high-temperature purified gas is formed in the high-temperature furnace, the high-temperature purified gas in the high-temperature furnace enters the high-temperature gas-gas heat exchanger through a communication port communicated with the high-temperature gas-gas heat exchanger and is used for circularly heating the organic waste gas entering the high-temperature gas-gas heat exchanger, and the heat utilization rate in the high-temperature furnace and the heat exchange effect of the high-temperature gas. The high-temperature purified gas enters the first-stage water-gas heat exchanger after being subjected to heat exchange and cooling through the high-temperature gas-gas heat exchanger, is subjected to water-gas heat exchange with the first-stage water-gas heat exchanger, is continuously subjected to heat exchange and cooling, and is exhausted to the exhaust smoke window through the exhaust fan.
Referring to fig. 1, organic waste gas is imported into the high-temperature gas-gas heat exchanger after passing through the induced draft fan, the induced draft fan is arranged at the front end of the waste gas collecting pipeline, organic waste gas in a workshop is collected into the waste gas collecting pipeline through the induced draft fan and is imported into the high-temperature gas-gas heat exchanger, and the organic waste gas is convenient to collect.
Referring to fig. 1, the heat exchange tube in the high-temperature gas-gas heat exchanger is a multi-head spiral heat exchange tube, and the multi-head spiral heat exchange tube is made of high-temperature resistant stainless steel. The setting of bull spiral heat exchange tube to the material of equal quality, intersects in ordinary heat exchange tube, the heat transfer area of effective increase, specifically, the heat transfer area of spiral heat exchange tube increases to original 1.3 times, and then effectively promotes heat exchange efficiency. The multi-head spiral heat exchange tube is made of high-temperature-resistant stainless steel, the high-temperature-resistant stainless steel can normally work at 1000 ℃, the service life is long, and the service life of the whole high-temperature gas-gas heat exchanger is prolonged.
Referring to fig. 1, the high temperature gas-gas heat exchanger is a gas-gas heat exchanger which heats the organic waste gas at 60 ℃ at the inlet to 750 ℃ from low temperature through the high temperature gas-gas heat exchanger, the organic waste gas is primarily decomposed in the high temperature gas-gas heat exchanger, and the organic waste gas after primary decomposition enters the high temperature furnace through the high temperature pipeline. The organic waste gas is subjected to heat exchange with high-temperature gas in the high-temperature furnace through the high-temperature gas-gas heat exchanger, the temperature of the organic waste gas is directly increased to 700 ℃, the temperature of the organic waste gas is greatly close to 800 ℃ required by complete decomposition of the organic waste gas, the organic waste gas is preliminarily decomposed in the high-temperature gas-gas heat exchanger, the heat exchange efficiency is effectively improved, the energy conservation and emission reduction are facilitated, and the enterprise operation cost is reduced.
Referring to fig. 1, the high-efficiency energy-saving organic waste gas purification system of the present invention further comprises a temperature control system, wherein the temperature control system is connected with a high temperature furnace, and honeycomb ceramics with a heat storage function are arranged in the high temperature furnace. The arrangement of the honeycomb ceramics effectively prolongs the time for the organic waste gas to pass through, so that the organic waste gas can be fully decomposed. The temperature in the high-temperature furnace is controlled to be 850 ℃ by a temperature control system, organic waste gas is decomposed for the second time after entering the high-temperature furnace, and the organic waste gas is thoroughly decomposed into carbon dioxide and water in the high-temperature furnace and releases a large amount of heat. The high-temperature purified gas in the high-temperature furnace is cooled to 210 ℃ after heat exchange through the high-temperature gas-gas heat exchanger, and specifically, the high-temperature purified gas in the high-temperature furnace enters the high-temperature gas-gas heat exchanger through a high-temperature gas input end of the high-temperature gas-gas heat exchanger, organic waste gas in the high-temperature gas-gas heat exchanger is preheated, and the temperature of the purified gas output from the high-temperature gas-gas heat exchanger is about 200 ℃ after heat exchange. The high-efficiency energy-saving organic waste gas purification system also comprises high-temperature hot water equipment, wherein the high-temperature hot water equipment comprises a primary water inlet and a primary water outlet, the primary water-gas heat exchanger comprises a primary purified gas channel and a primary hot water channel, purified gas at about 200 ℃ output by the high-temperature gas-gas heat exchanger enters the primary purified gas channel of the primary water-gas heat exchanger, water in the high-temperature hot water equipment flows out of the primary water outlet and enters the primary hot water channel, the water returns to the high-temperature hot water equipment from the primary water inlet after heat exchange, and the temperature of the heated water in the high-temperature hot water equipment is above. The hot water with the temperature of over 90 ℃ obtained after the heat exchange of the primary water-gas heat exchanger can be used for supplying heat for printing and compounding machines in workshops, can also be used for central heating in northern cold weather, and can also be used as a heat source of a lithium bromide absorption refrigerator to drive a central air conditioner. The arrangement of the high-temperature hot water equipment is beneficial to the heat recovery of the primary water-gas heat exchanger, and the heat recovery utilization rate is improved. The high-efficiency energy-saving organic waste gas purification system also comprises a secondary water-gas heat exchanger, wherein the secondary water-gas heat exchanger is arranged on the exhaust smoke window and comprises a secondary gas purification channel and a secondary hot water channel, normal-temperature tap water enters a secondary water inlet of the secondary water-gas heat exchanger, the water temperature at a secondary outlet of the secondary water-gas heat exchanger is 80 ℃, an inlet of the secondary gas purification channel of the secondary water-gas heat exchanger is communicated with an outlet of the primary gas purification channel of the primary water-gas heat exchanger, purified gas subjected to heat exchange and temperature reduction by the primary water-gas heat exchanger enters the secondary gas purification channel through an exhaust fan, and is exhausted through the exhaust smoke window after being subjected to heat exchange with water in the secondary. The temperature of the hot water prepared by the secondary water-gas heat exchanger is 80 ℃, and the hot water can be used for supplying hot water to dormitories and kitchens; in the cold weather in the north, the solar water heater can also be used for central heating; it can also be used as heat source of lithium bromide absorption refrigerator to drive central air conditioner.
Referring to fig. 1, in combination with the above embodiments, the energy-efficient organic waste gas purification system of the present invention preferably uses natural gas as a fuel for a printing shop in a region with natural pool; in areas without natural gas supply, alcohol-based fuels such as methanol, ethanol and the like are selected as fuels for printing workshops.
Referring to fig. 1, combining the above several embodiments, the exhaust gas purification and heat recovery principle of the energy-efficient organic exhaust gas purification system of the present invention is as follows:
organic waste gas that the workshop was collected is imported high temperature gas heat exchanger through the draught fan, carries out the heat exchange at high temperature gas heat exchanger and heaies up to about 700 ℃ to carry out preliminary decomposition back, get into the high temperature furnace through high temperature tube, put honeycomb pottery in the high temperature furnace, honeycomb pottery both plays the heat retaining effect, plays the dwell time of extension waste gas in the high temperature district again simultaneously, makes the organic waste gas of entering fully decompose, reaches 99.8% purification efficiency. The temperature in the high-temperature furnace is kept at about 800 ℃ by a temperature control system, the waste gas is thoroughly decomposed into carbon dioxide and water through the high-temperature furnace, simultaneously releases a large amount of heat, enters the high-temperature gas-gas heat exchanger to exchange heat with the organic waste gas entering the high-temperature gas-gas heat exchanger, preheats the organic waste gas entering the high-temperature gas-gas heat exchanger at the input end through heat exchange, the temperature of purified gas output from the high-temperature gas-gas heat exchanger is about 200 ℃, the purified gas after heat exchange and temperature reduction in the high-temperature gas-gas heat exchanger enters the primary gas-gas heat exchanger, water in the high-temperature water heating equipment is heated to 90-100 ℃, and then is discharged to a smoke window through an exhaust fan, a secondary water-gas heat exchanger is added at the lower end of the chimney, after the water in the secondary water-gas heat exchanger exchanges heat with purified gas, the water is heated to a temperature of 60-80 ℃ and finally the purified gas after purification and heat exchange is discharged from the top of the chimney. The hot water heated to 90-100 ℃ can be used for supplying heat to workshop printing and compounding machines; in northern areas, hot water in the water tank can also supply heat to workshops in winter; the hot water heated to 60-80 ℃ can be used for supplying hot water to dormitories and kitchens, and can also be used for central heating in the cold weather in the north.
The above embodiments are only specific embodiments of the present invention, and the description thereof is specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications are possible without departing from the inventive concept, and such obvious alternatives fall within the scope of the invention.
Claims (7)
1. An efficient energy-saving organic waste gas purification system comprises a waste gas collecting pipeline for collecting workshop organic waste gas, a discharge smoke window for purifying gas purified by a discharge system, and is characterized by further comprising a high-temperature gas-gas heat exchanger, a high-temperature furnace, a primary water-gas heat exchanger and an exhaust fan, wherein the high-temperature gas-gas heat exchanger, the high-temperature furnace, the primary water-gas heat exchanger and the exhaust fan are arranged between the waste gas collecting pipeline and the discharge smoke window, the high-temperature gas-gas heat exchanger comprises a low-temperature gas channel and a high-temperature gas channel, organic waste gas in the waste gas collecting pipeline enters the low-temperature gas channel of the high-temperature gas-gas heat exchanger to exchange heat with high-temperature gas in the high-temperature gas-gas heat exchanger to heat, and is primarily decomposed in the high-temperature gas-gas heat exchanger, and the high-temperature gas-gas heat exchanger heats organic waste gas with the temperature of 50 +/-10 ℃ at an inlet to 700 +/-, organic waste gas is primarily decomposed in the high-temperature gas-gas heat exchanger, the organic waste gas subjected to heat exchange and temperature rise of the high-temperature gas-gas heat exchanger and primary decomposition enters the high-temperature furnace through a high-temperature pipeline, the temperature in the high-temperature furnace is controlled to be 800 +/-50 ℃ by a temperature control system, the organic waste gas is secondarily decomposed after entering the high-temperature furnace, the organic waste gas is thoroughly decomposed into carbon dioxide and water in the high-temperature furnace and releases a large amount of heat, a communication port communicated with a high-temperature gas channel of the high-temperature gas-gas heat exchanger is arranged on the high-temperature furnace, high-temperature purified gas generated by heat release of the organic waste gas in the high-temperature furnace enters the high-temperature gas channel in the high-temperature gas-gas heat exchanger through the communication port, and purified gas after passing through the high.
2. The system for purifying organic waste gas with high efficiency and energy saving as claimed in claim 1, wherein the organic waste gas is input into the high temperature gas-gas heat exchanger through an induced draft fan, and the induced draft fan is arranged at the front end of the waste gas collecting pipeline.
3. The system for purifying organic waste gas with high efficiency and energy saving as claimed in claim 2, wherein the heat exchange tubes in the high temperature gas-gas heat exchanger are multi-head spiral heat exchange tubes, and the multi-head spiral heat exchange tubes are made of high temperature resistant stainless steel materials.
4. An energy-efficient organic waste gas purification system according to any one of claims 1 to 3, further comprising a temperature control system, wherein the temperature control system is connected with a high temperature furnace, and honeycomb ceramics with heat storage function is arranged in the high temperature furnace.
5. The system for purifying organic waste gas with high efficiency and energy saving according to claim 4, wherein the high temperature purified gas in the high temperature furnace is cooled to 200 ℃ ± 10 ℃ after heat exchange through the high temperature gas-gas heat exchanger.
6. The system according to claim 5, further comprising a high temperature water heater, wherein the high temperature water heater comprises a primary water inlet and a primary water outlet, the primary water-gas heat exchanger comprises a primary purified gas channel and a primary water heating channel, purified gas in the high temperature water-gas heat exchanger enters the primary purified gas channel of the primary water-gas heat exchanger, water in the high temperature water heater flows out from the primary water outlet and enters the primary water heating channel, the water returns to the high temperature water heater through the primary water inlet after heat exchange, and the temperature of the heated water in the high temperature water heater is above 90 ℃.
7. The system for purifying organic waste gas with high efficiency and energy saving as claimed in claim 6, further comprising a secondary water-gas heat exchanger, wherein the secondary water-gas heat exchanger is arranged on the exhaust smoke window, the secondary water-gas heat exchanger comprises a secondary purified gas channel and a secondary hot water channel, normal temperature tap water enters from a secondary water inlet of the secondary water-gas heat exchanger, the water temperature at a secondary outlet of the secondary water-gas heat exchanger is 50-80 ℃, an inlet of the secondary purified gas channel of the secondary water-gas heat exchanger is communicated with an outlet of the primary purified gas channel of the primary water-gas heat exchanger, purified gas after heat exchange and temperature reduction by the primary water-gas heat exchanger enters the secondary purified gas channel through an exhaust fan, and is exhausted through the exhaust smoke window after heat exchange with water in.
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