CN210398946U - Energy-saving emission-reducing system for treating gravure organic waste gas through double channels - Google Patents
Energy-saving emission-reducing system for treating gravure organic waste gas through double channels Download PDFInfo
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- CN210398946U CN210398946U CN201920680305.XU CN201920680305U CN210398946U CN 210398946 U CN210398946 U CN 210398946U CN 201920680305 U CN201920680305 U CN 201920680305U CN 210398946 U CN210398946 U CN 210398946U
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G7/00—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals
- F23G7/06—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases
- F23G7/07—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases in which combustion takes place in the presence of catalytic material
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Abstract
The utility model discloses an energy-saving and emission-reducing system for treating gravure organic waste gas by two channels, which comprises an outer channel, wherein organic waste gas is introduced into the outer channel, and a high-temperature furnace is arranged inside the outer channel; the inner passage is arranged inside the outer passage and communicated with the high-temperature furnace to be used as a heat source; the outer passage comprises a preheating passage, a slow flow passage and a return air heat preservation passage, the preheating passage, the slow flow passage and the return air heat preservation passage are sequentially communicated, the preheating passage is communicated with an air outlet of the gravure equipment, and the return air heat preservation passage is communicated with an air inlet of the gravure equipment; the organic waste gas sequentially passes through an air outlet, a preheating passage, a slow flow passage, an air return heat preservation passage and an air inlet of the gravure equipment to form internal circulation; the heat source flows in the inner passage and can be discharged to the outside. The utility model discloses solved emission reduction, energy-conservation and safe tripartite problem systematically, produced good economic benefits and social.
Description
Technical Field
The utility model relates to a gravure organic waste gas's processing field, in particular to two pass treatment gravure organic waste gas's energy saving and emission reduction system.
Background
The packaging and printing industry generates a large amount of organic waste gases, which mainly include VOCs. At present, the domestic main VOCs treatment is divided into source control, process management and terminal treatment. The main technology for controlling the source is to use water-based ink; the process management mainly comprises the steps of finely managing the printing process and reducing the generation of VOCs; the end treatment mainly comprises recovery and elimination. For example: the active carbon and the UV are photolyzed, the waste gas enters an active carbon/UV photolysis device to be treated, and then is directly discharged into the atmosphere, only one function of emission reduction is completed, and the technology belongs to a single point position, namely the point technology.
At present, with the popularization of heat release technologies in the treatment processes of heat storage oxidation, catalytic combustion and the like, the design of recycling heat released in the treatment process while reducing emission is more and more favored, and two functions of emission reduction and energy conservation are completed, wherein two functions are combined into one line, and the technology can be called as a line technology. In current line technique, when handling the gravure waste gas of low concentration, big amount of wind, must concentrate earlier, then carry out direct combustion with the organic waste gas of high concentration in a limited high temperature space, waste gas and heat source are on same route, and is the same with "some technique" moreover, and the gas after the processing directly discharges the atmosphere to two safety problems appear easily: the possibility of explosion and unstable treatment performance of high-concentration organic waste gas at high temperature and in a limited space bring about the possibility of exceeding the emission standard.
For example, in comparison with document 1: li hui, huang yan peng, huang cao ji, equipment for treating VOCs process waste gas in packaging and printing industry: guangdong, CN107774093A [ P ]].2018-03-09. Containing VOCSFrom the gas collection assemblyThe pipe enters an adsorption device, and the treated waste gas is discharged through a purification and evacuation pipeline; when the adsorption is saturated, the system enters a desorption period, the adsorbed VOCs are desorbed by hot air, and the concentrated VOCs gas obtained by desorption is sent to the first heat exchanger through the desorption induced draft tube for preheating and then transferred to the oxidation chamber for oxidation. And part of the emptied purified gas is heated by the second heat exchanger and transferred into the adsorption box through the desorption hot air pipe for desorption, and the adsorbent saturated in adsorption is desorbed and regenerated. The combustion system is arranged on the left vertical surface of the oxidation chamber to provide heat energy for the oxidation chamber. In short, the reference 1 adopts an adsorption and desorption technique to concentrate the VOCs generated by the package printing, then stores heat and burns the VOCs with open fire to process the VOCs, and exchanges heat to recycle heat energy to achieve the purpose of energy conservation. But two security issues are easily presented: the possibility of explosion and unstable treatment performance of high-concentration organic waste gas at high temperature and in a limited space bring about the possibility of exceeding the emission standard. The technology of the utility model directly collects the existing low-concentration gravure organic waste gas, and the organic waste gas is separated from the open fire through the inside and outside division double-channel design of the tube in the tube, thereby greatly improving the safety of the technology; the treated gas is not directly discharged into the atmosphere, but circulates in a production area, so that the stability of the emission reduction effect is improved.
Comparison document 2: the Tianhong flag printing industry VOCs zero emission technology is in the reason of meeting cold [ J ]. China economic periodicals, 2017, (33) 56-57. The method discloses an internationally advanced new technology-VOCs (volatile organic compounds) zero-emission, high-efficiency and energy-saving green intaglio printing press which can be widely applied to the printing industry, and although the VOCs problem is solved from the source, the method is large in investment and high in updating cost, and the popularization difficulty of the technology is serious considering the actual demands and the tiny profits of enterprises with multiple batches and small batches. The technology of the utility model is directly installed on the existing equipment of enterprises, and the production equipment is not required to be replaced; and the excellent energy-saving characteristic ensures the use process, namely the profit process, and the enterprise popularization difficulty is small.
Comparison document 3: jiahai Liang, Zhao Jun, Li Yu Pau, Hu shou Gen. Green energy saving technology of gravure industry [ J ]. Package academic, 2015, (02): 53-58. The energy-saving emission-reducing scheme is practical and feasible through the discussion of main related technologies such as energy conservation of a hot air drying system of the gravure printing machine, comprehensive treatment of printing organic waste gases (VOCs), recycling of waste heat of a main heat source of a gravure enterprise and the like. On the basis, the thermal combustion type oxidizer is further combined with a hot water two-stage lithium bromide unit, the problem that the thermal combustion type oxidizer is high in operation cost is solved, the cost of the gravure printing industry is reduced by 20-40%, but the thermal combustion type oxidizer needs to be improved and designed from multiple aspects, and is complex in structure, high in application difficulty and low in feasibility; but also belongs to the technology of emission reduction and energy conservation, has the characteristics of open flame combustion of high-concentration and high-pressure organic waste gas and direct discharge to the atmosphere after treatment, has higher hidden danger in safety and has deficiency in the stability of emission reduction effect.
In summary, although the research on VOCs related in domestic and foreign published documents is numerous, the research is mainly focused on emission reduction or energy conservation and emission reduction, and the problems of emission reduction, energy conservation and safety are rarely considered systematically. Moreover, the existing treatment technologies have the problems of high application difficulty, high manufacturing cost and operation cost, low economic benefit and the like, and are difficult to mobilize the enthusiasm of most domestic small and medium-sized enterprises for actively carrying out environmental treatment.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that an energy saving and emission reduction system of gravure organic waste gas is handled to dual-channel is provided, has not only solved emission reduction, energy-conservation and safe tripartite problem, and is with low costs moreover, can produce good economic benefits and social.
In order to achieve the technical effect, the utility model provides a dual-channel treatment gravure organic waste gas's energy saving and emission reduction system, include:
the device comprises an outer passage, an organic waste gas inlet passage and a high-temperature furnace, wherein the high-temperature furnace is arranged in the outer passage;
the inner passage is arranged inside the outer passage and communicated with the high-temperature furnace to be used as a heat source;
the outer passage comprises a preheating passage, a slow flow passage and a return air heat preservation passage, the preheating passage, the slow flow passage and the return air heat preservation passage are sequentially communicated, the preheating passage is communicated with an air outlet of the gravure equipment, and the return air heat preservation passage is communicated with an air inlet of the gravure equipment;
the organic waste gas sequentially passes through an air outlet, a preheating passage, a slow flow passage, an air return heat preservation passage and an air inlet of the gravure equipment to form internal circulation;
the heat source flows in the inner passage and can be discharged to the outside.
In an improvement of the above aspect, the high temperature furnace is provided in the slow flow passage so that the organic waste gas contacts a wall surface of the inner passage in the slow flow passage to cause a catalytic oxidation reaction and a high temperature oxidation reaction.
As an improvement of the scheme, the temperature of the tube wall of the inner passage in the slow flow passage is 500-950 ℃, and the temperature of the tube wall of the inner passage close to the high-temperature furnace is 800-930 ℃.
As an improvement of the scheme, the temperature of the pipe wall of the inner passage in the preheating passage is 100-500 ℃; the pipe wall temperature of the inner passage in the return air heat-preservation passage is 100-500 ℃.
As an improvement of the scheme, a partition plate is arranged in the slow flow passage, and the partition plate divides the slow flow passage into slow flow air passages.
As an improvement of the scheme, the gravure equipment comprises an oven and an ink tank, air outlets of the oven and the ink tank are communicated with the preheating passage, and an air inlet of the oven is communicated with the return air heat-preserving passage.
As an improvement of the scheme, the preheating passage is communicated with the slow flow passage through a main fan, the return air heat-preservation passage is communicated with an air inlet of the drying oven through an air heater, and air outlets of the drying oven and the ink groove are communicated with the preheating passage through a waste gas exhaust fan.
As an improvement of the scheme, the main fan is a variable frequency fan.
As an improvement of the scheme, the inner passage comprises an inner passage main pipe and a pressure return pipe, the pressure return pipe is provided with a one-way pressure release valve, and the pressure return pipe is communicated with the high-temperature furnace through a natural gas fan.
As an improvement of the scheme, the inner passage is provided with a first outlet, and a tail gas fan is arranged at the first outlet so as to communicate the inner passage with the outside;
the slow flow passage is provided with an air supply fan so as to communicate the slow flow passage with the outside.
Implement the utility model discloses following beneficial effect has:
the utility model relates to a pipe structure in pipe, comprehensive solution emission reduction, energy-conservation and safe tripartite problem, three one-point becomes the face, is the "face technique" of an emphasis system solution problem, has following advance:
1. more stable emission reduction: organic waste gas, namely VOCs-carrying airflow, circulates in a production area formed by an outer passage, the organic waste gas is not directly discharged to the atmosphere, only a small amount of organic waste gas enters the inner passage when pressure relief is needed, and the small amount of VOCs is basically treated in a long and sufficient natural gas flame and heat state; even if the high-temperature furnace occasionally works insufficiently, the insufficiently processed VOCs enter the next internal circulation along with the hot return air, so that the atmosphere is not polluted, the emission reduction effect is more stable, and good social benefits are formed.
2. More excellent energy conservation: the hot air flow treated by the high-temperature furnace can be introduced into the return air heat-preserving passage in percent and enters production equipment to participate in production, so that the production equipment can basically maintain normal operation without using electric energy or steam energy, and the total energy consumption of production is greatly reduced; in addition, the natural gas generated by the open flame combustion partially enters the preheating passage through drainage, the collected VOCs airflow is preheated, the efficiency of oxidation treatment of the high-temperature furnace is favorably ensured, and the treated gas is kept at the temperature required by the oven after partially entering the return air heat-preservation passage. Therefore, when the enterprise uses the technology to process VOCs to reach the emission standard, the production energy consumption is obviously reduced, a new profit growth point is formed, and good economic benefits can be obtained.
3. A more secure system: the slow flow passage is provided with an air supplementing fan communicated with the atmosphere and is matched with the first outlet of the inner passage, so that the high-temperature furnace is not over high in temperature, heat source airflow is smooth and free of high pressure, and the possibility of explosion of the inner passage is greatly reduced; the concentration of VOCs to be treated is low, the VOCs are difficult to directly burn, and the double-channel design with internal and external separation ensures that the VOCs do not contact open fire and are difficult to fire; the airflow carrying the VOCs is connected with the inner passage through the one-way pressure relief valve at the outer passage, so that the outer passage can be prevented from generating high pressure, and the safety of organic waste gas treatment is improved.
4. More convenient environmental protection supervision's system: not only the enterprise need use hot return air to reduce the energy consumption and obtain new profit growth point, if not operating moreover the utility model relates to a system, printing combined process can not start, consequently, the utility model discloses will handle VOCs and enterprise's profit and combine organically, install the utility model discloses afterwards, not only fundamentally has solved the difficult problem that prior art operating rate is low, can avoid current enterprise to escape environmental protection department's supervision and punishment's disorderly through shutting down moreover, has both solved in the past "detection personnel enter the factory, and the workshop is shut down and is dealt with" exhaust gas monitoring law enforcement difficult problem makes things convenient for environmental protection department to supervise the management again, has obvious social.
5. More widely used systems: the utility model discloses according to local conditions, it is little to take up an area of, can be under the condition that maintains original production technology, directly install on gravure enterprise's existing equipment. Moreover, relative to the most prevalent RTO/RCO technology of current, the utility model discloses whole investment cost is low, and the operation not only does not consume money but also can give birth to money, therefore the enterprise acceptance is higher, has fully solved emission reduction, energy-conservation and safe system problem among gravure enterprise's the organic waste gas treatment, and the marketing degree of difficulty is lower, and application prospect is wider.
Drawings
Fig. 1 is a schematic structural diagram of the energy saving and emission reduction system of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings. Only this statement, the utility model discloses the upper and lower, left and right, preceding, back, inside and outside etc. position words that appear or will appear in the text only use the utility model discloses an attached drawing is the benchmark, and it is not right the utility model discloses a concrete restriction.
The utility model provides an energy saving and emission reduction system of gravure organic waste gas is handled to dual channel, include:
the device comprises an outer passage 1, wherein organic waste gas is introduced into the outer passage 1, and a high-temperature furnace 3 is arranged inside the outer passage 1;
an inner passage 2, the inner passage 2 being provided inside the outer passage 1 and communicating with the high temperature furnace 3 as a heat source;
the outer passage 1 comprises a preheating passage 11, a slow flow passage 12 and a return air heat-insulation passage 13, the preheating passage 11, the slow flow passage 12 and the return air heat-insulation passage 13 are sequentially communicated, the preheating passage 11 is communicated with an air outlet of the gravure equipment 10, and the return air heat-insulation passage 13 is communicated with an air inlet of the gravure equipment 10;
the organic waste gas sequentially passes through an air outlet, a preheating passage, a slow flow passage, an air return heat preservation passage and an air inlet of the gravure equipment to form internal circulation; the heat source flows in the inner passage and can be discharged to the outside.
The utility model discloses inside and outside divided dual-channel has been set up, include: (1) inner path 2 taken as a heat source: the heat source is natural gas burnt by open fire, and the generated high-temperature airflow transmits heat to the airflow containing organic waste gas collected from the drying oven of the gravure equipment through the well-designed inner passage 2 and the corresponding preheating passage 11, slow flow passage 12 and return air heat-preserving passage 13; (2) outer path 1 for the flow of organic waste gas: the large-air-volume air flow carrying the organic waste gas is collected from an oven, an ink groove/a glue groove and other devices of the gravure equipment, and then returns to the oven in a hot air mode through a preheating passage 11, a slow flow passage 12 and a return air heat preservation passage 13. The organic waste gas is treated by catalytic oxidation reaction and high-temperature oxidation reaction on the surface of the pipe wall under high temperature. Therefore, the utility model discloses from the actual production, handle gravure organic waste gas through the double-channel device, solved the problem of discharging reduction, energy-conservation and safe tripartite systematically, fundamentally solves from the produced organic waste gas emission of oven up to standard.
It should be noted that the gravure organic waste gas of the present invention refers to organic waste gas generated by gravure printing machine, compound machine and coating machine in gravure industry, which is organic waste gas generated by alcohol and ester solution, including but not limited to organic solvent and mixture commonly used in packaging and printing industry such as ethyl acetate, n-propyl acetate, n-butyl acetate, isopropanol and butanone.
It should also be noted that, the utility model relates to a tubular construction in pipe, outer route is as the outer tube, and interior route is as the inner tube, the centre of outer tube can be located to the inner tube, also can locate the bottom or be the side, no matter the size, shape and the position of outer tube and inner tube, it all belongs to the utility model discloses a protection scope.
Preferably, the high temperature furnace 3 is provided in the slow flow path 12 so that the organic exhaust gas contacts the high temperature tube wall surface of the inner path 2 in the slow flow path 12 to cause a catalytic oxidation reaction and a high temperature oxidation reaction. The utility model discloses be provided with unhurried current route 12, organic waste gas can reduce transmission rate in unhurried current route 12, perhaps prolongs transmission path for organic waste gas takes place abundant catalytic oxidation reaction and high temperature oxidation reaction with the high temperature pipe wall of inner path 2, and organic waste gas is decomposed completely.
As an embodiment of the slow flow passage, a partition 14 is provided in the slow flow passage 12, and the partition 14 divides the slow flow passage 12 into slow flow air passages. The baffle plate 14 can change the slow flow passage 12 into a plurality of parallel slow flow air passages, and the transmission path of the organic waste gas is prolonged, so that the aim of slow flow is fulfilled.
It should be noted that the slow flow passage 12 of the present invention can also have other implementation manners, for example, a baffle is provided, or an S-shaped or other curved slow flow air passage is provided, as long as it achieves the purpose of slow flow.
It should be further noted that the slow flow channel 12 of the present invention may also be a straight tube without obstacles, which may also realize sufficient catalytic oxidation reaction and high temperature oxidation reaction between the organic waste gas and the high temperature tube wall of the inner passage 2. In this case, if the purpose of the slow flow is to be achieved, the flow rate of the organic waste gas may be controlled, and the flow rate is not limited thereto.
The temperature of the tube wall of the inner passage 2 in the slow flow passage 12 is 500-950 ℃, and the temperature of the tube wall of the inner passage 2 close to the high temperature furnace 3 is 800-930 ℃. The organic waste gas and the high-temperature pipe wall of the inner passage 2 generate sufficient catalytic oxidation reaction and high-temperature oxidation reaction to generate harmless high-temperature gas.
The pipe wall temperature of the inner passage 2 in the preheating passage 11 is 100-500 ℃; the pipe wall temperature of the inner passage 2 in the return air heat-preservation passage 13 is 100-500 ℃. The heat generated by the natural gas combusted by open fire flows through drainage, and a part of the heat enters a preheating passage to preheat the collected VOCs airflow, wherein the preheating temperature is maintained at 100-500 ℃; one portion enters the return air heat preservation path to maintain the clean heat flow at the required temperature of the oven, about 100-. When the technology is used for treating the VOCs by the enterprises to reach the emission standard, the energy consumption is obviously reduced, the direct income increase of the enterprises is realized, the VOCs treatment is organically combined with the enterprise profit, and the problem of low operation rate in the prior art is fundamentally solved.
And, because the utility model discloses inside and outside two channel design of cutting apart, the inner passage can play the effect of generating heat for a long time, can keep from energy saving and emission reduction system to gravure equipment's transport hot-blast main's temperature stability, and this pipeline has the temperature about 50 meters on average to remain stable basically, is favorable to fully processing organic waste gas, realizes more thorough emission reduction.
Further, in order to realize the good connection of interior route and outer route to and the security of assurance system, the utility model discloses a plurality of fans, return pressure pipeline, check valve and tonifying qi fan have been set up.
The gravure equipment 10 comprises an oven 20 and an ink tank 30, air outlets of the oven 20 and the ink tank 30 are communicated with the preheating passage 11, and an air inlet of the oven 20 is communicated with the return air heat-preserving passage 13. Organic waste gas collected by the oven 20 and the ink groove 30 enters the preheating passage 11 for preheating through air outlets of the oven 20 and the ink groove 30, then enters the slow flow passage 12 for sufficient catalytic oxidation reaction and high-temperature oxidation reaction, and processed air flow forms hot return air, passes through the return air heat preservation passage 13, and enters the oven again through an air inlet of the oven 20 for drying ink.
Preferably, the preheating passage 11 is communicated with the slow flow passage 12 through a main fan 4, the return air heat preservation passage 13 is communicated with an air inlet of the oven 20 through an air heater 5, and air outlets of the oven 20 and the ink tank 30 are communicated with the preheating passage 11 through an exhaust air suction fan 6. The main blower 4, the hot air blower 5 and the exhaust gas suction blower 6 control the gas flow of the organic exhaust gas so that the internal circulation can be smoothly and stably performed. Preferably, the main fan 4 is a variable frequency fan, and regulates and controls the air quantity and the air speed entering the slow flow passage 12.
The inner passage 2 comprises an inner passage main pipe 21 and a pressure return pipe 22, the pressure return pipe 22 is provided with a one-way pressure release valve 23, and the pressure return pipe 22 is communicated with the high-temperature furnace 3 through a natural gas fan 7. The treated organic waste gas may generate residual VOCSGas, back pressure pipe 22 will balance the VOCSThe gas is fed into the high temperature furnace 3 for combustion, which facilitates the combustion of natural gas and allows the removal of VOCs therein by the combustion processSGas, energy-saving effect and VOC reductionSAnd (5) discharging gas.
The inner passage 2 is provided with a first outlet 24, and a tail gas fan (not shown in the figure) is installed at the first outlet 24 so as to communicate the inner passage 2 with the outside. The high-temperature heat source carries out the heat exchange through interior route, becomes low temperature gas to discharge through first export and tail gas fan, enable the unobstructed nothing high pressure of air current, greatly reduced entire system the possibility of explosion appear.
The slow flow passage 12 is provided with an air supply fan (not shown in the figure) so that the slow flow passage 12 is communicated with the outside, the air flow is smooth without high pressure, the possibility of explosion of the whole system is greatly reduced, and the safety of internal circulation is ensured.
To sum up, the utility model discloses a theory of operation as follows:
1. the utility model collects organic waste gas through the oven 20 and the ink groove 30, and the collected organic waste gas enters the preheating passage 11 for preheating through the air outlets of the oven 20 and the ink groove 30 under the action of the waste gas exhaust fan 6;
2. the preheated organic waste gas enters a slow flow passage 12 under the action of a main fan 4, a high-temperature furnace 3 is arranged in the slow flow passage 12, and the organic waste gas contacts the surface of the high-temperature pipe wall of an inner passage 2 in the slow flow passage 12 to generate catalytic oxidation reaction and high-temperature oxidation reaction to generate harmless high-temperature gas to form hot return air;
3. the hot return air flows through the return air heat preservation passage 13 and enters the oven again through the air inlet of the oven 20 under the action of the air heater 5 for drying the ink, so that the internal circulation, namely the internal circulation, of the VOCs production area without emission to the atmosphere is formed.
4. When the temperature of the hot return air is higher than the temperature required by the oven, fresh air is sent to the oven 20 from the environment to be cooled, at the moment, as the pressure is increased, the one-way pressure release valve 23 is opened, redundant organic waste gas is pumped into the high-temperature furnace 3 through the natural gas fan 7 and is combusted along with natural gas, and the produced carbon dioxide and water are discharged to the atmosphere along with the combustion products of the natural gas and the first outlet 24.
5. The heat source is natural gas which is burnt by open fire in the high-temperature furnace 3, the generated high-temperature airflow conducts heat to VOCs-containing airflow outside the pipe through the inner passage 2, finally the high-temperature airflow is sent into a washing tower, a filtering tank and a trickling filter tower through a fan to be treated and then directly discharged into the atmosphere, and the inlet of the passage is a natural gas fan in the high-temperature furnace 3.
The utility model discloses a pollution control effect as follows:
1. the total VOCs can be lower than 30mg/m3And the total VOCs in the period II meets the local standard DB44/815-2010 volatile organic compound emission standard of the printing industry of Guangdong province: standard maximum allowable discharge concentration 120mg/m3。
2. The organic waste gas treatment efficiency of a packaging and printing enterprise can reach 95%.
3. The energy cost saving efficiency can reach 40-50%.
4. Treatment scale: installation the utility model discloses behind the energy saving and emission reduction system, 4 imprints and 4 do the production of working simultaneously of duplicator take the VOCs air current can be handled to a high temperature furnace.
The enterprise is using the utility model discloses when handling VOCs and reaching emission standard, energy cost is showing and is reducing, realizes that the enterprise directly increases receipts, will handle VOCs and enterprise's profit and organically combine, fundamentally has solved the difficult problem that prior art purification efficiency is low, running cost is high. Moreover, the utility model discloses energy saving and emission reduction system's input construction cost is lower, according to the engineering scale of difference to based on current price of goods level, the cost is about 300 + 600 ten thousand/every set, is far less than current environmental treatment equipment.
The utility model discloses an industrial application as follows:
embodiment 1
1. The operation unit is as follows: the enterprise of exclusive foreign business operation established in 1997 occupies a floor area of approximately 16000 square meters. The labels of PVC shrink film, the labels of OPP pearlized film automatic labeling and various packaging bags, and other plastic packaging products are produced by professional printing, the annual production capacity of the labels is 30 hundred million, and the annual output of the composite packaging bags can reach 5 hundred million sets.
2. Pollution characteristics: the VOCs content is low, and the air volume is large; the four gravure presses were run essentially continuously, releasing an average daily amount of solvent of about 3060 kg.
3. Engineering scale: a set of energy-saving and emission-reducing system.
4. Operating time: 2 years old
5. The operation effect is as follows:
A. the four gravure printing machines continuously operate daily, and after the technology is checked and accepted to operate, the emission continuously reaches the standard under the condition of maintaining daily production, thereby meeting the requirement of environmental protection.
B. Energy cost: saving about 49% of energy cost.
C. The method is simple and easy to operate, low in energy cost, low in material consumption, high in safety and free of special people for taking charge of device operation.
6. The total investment cost of the equipment is lower, wherein the construction cost of the engineering infrastructure is about 100 ten thousand, and the investment cost of the equipment is about 230 ten thousand.
The foregoing is a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the principle of the present invention, and these improvements and decorations are also considered as the protection scope of the present invention.
Claims (10)
1. The utility model provides an energy saving and emission reduction system of gravure organic waste gas is handled to two routes which characterized in that includes:
the device comprises an outer passage, an organic waste gas inlet passage and a high-temperature furnace, wherein the high-temperature furnace is arranged in the outer passage;
the inner passage is arranged inside the outer passage and communicated with the high-temperature furnace to be used as a heat source;
the outer passage comprises a preheating passage, a slow flow passage and a return air heat preservation passage, the preheating passage, the slow flow passage and the return air heat preservation passage are sequentially communicated, the preheating passage is communicated with an air outlet of the gravure equipment, and the return air heat preservation passage is communicated with an air inlet of the gravure equipment;
the organic waste gas sequentially passes through an air outlet, a preheating passage, a slow flow passage, an air return heat preservation passage and an air inlet of the gravure equipment to form internal circulation;
the heat source flows in the inner passage and can be discharged to the outside.
2. The energy saving and emission reduction system for dual-channel treatment of gravure organic exhaust gas as set forth in claim 1, wherein the high temperature furnace is disposed in the slow flow channel so that the organic exhaust gas undergoes catalytic oxidation reaction and high temperature oxidation reaction by contacting the wall surface of the inner channel in the slow flow channel.
3. The energy-saving emission-reducing system for treating gravure organic waste gas through two channels as claimed in claim 2, wherein the temperature of the tube wall of the inner channel in the slow flow channel is 500-950 ℃, and the temperature of the tube wall of the inner channel close to the high temperature furnace is 800-930 ℃.
4. The energy-saving and emission-reducing system for treating gravure organic waste gas through two channels as claimed in claim 3, wherein the temperature of the tube wall of the inner channel in the preheating channel is 100-500 ℃;
the pipe wall temperature of the inner passage in the return air heat-preservation passage is 100-500 ℃.
5. The energy-saving emission-reducing system for the dual-channel treatment of gravure organic exhaust gas as claimed in claim 1, wherein a partition plate is arranged in the slow flow channel, and the partition plate divides the slow flow channel into slow flow air channels.
6. The energy-saving emission-reducing system for treating gravure organic waste gas through two channels as claimed in claim 1, wherein the gravure equipment comprises an oven and an ink tank, the air outlets of the oven and the ink tank are communicated with the preheating channel, and the air inlet of the oven is communicated with the return air heat-preserving channel.
7. The energy-saving and emission-reducing system for treating gravure organic waste gas through two channels as claimed in claim 6, wherein the preheating channel is communicated with the slow flow channel through a main blower, the return air heat preservation channel is communicated with the air inlet of the oven through an air heater, and the air outlets of the oven and the ink tank are communicated with the preheating channel through a waste gas exhaust blower.
8. The energy-saving and emission-reducing system for treating gravure organic waste gas through two channels according to claim 7, wherein the main blower is a variable frequency blower.
9. The energy-saving emission-reducing system for treating gravure organic waste gas through two channels according to claim 1, wherein the inner channel comprises an inner channel main pipe and a back pressure pipe, the back pressure pipe is provided with a one-way pressure relief valve, and the back pressure pipe is communicated with the high-temperature furnace through a natural gas fan.
10. The energy-saving emission-reducing system for treating gravure organic waste gas through two channels according to claim 1, wherein the inner channel is provided with a first outlet, and a tail gas fan is installed at the first outlet so as to communicate the inner channel with the outside;
the slow flow passage is provided with an air supply fan so as to communicate the slow flow passage with the outside.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810452713.XA CN108644794A (en) | 2018-05-13 | 2018-05-13 | A kind of improvement VOCs systems |
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| CN110094744A (en) * | 2018-05-13 | 2019-08-06 | 佛山市佳威节能环保设备有限公司 | A kind of energy-saving and emission-reduction system of binary channel processing gravure organic exhaust gas |
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| CN110500599A (en) * | 2019-08-07 | 2019-11-26 | 佛山市佳威节能环保设备有限公司 | A kind of energy-saving and emission-reduction system of gravure organic exhaust gas |
| CN112590264A (en) * | 2020-10-30 | 2021-04-02 | 佛吉亚(柳州)汽车座椅有限公司 | Method for reducing VOC (volatile organic compounds) of sponge of automobile seat |
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| JP2002257314A (en) * | 2001-03-02 | 2002-09-11 | Ngk Insulators Ltd | Hot blast generator |
| CN201149374Y (en) * | 2008-01-04 | 2008-11-12 | 南通凯迪自动机械有限公司 | Hot-blast stove through burning waste gas |
| JP4875675B2 (en) * | 2008-08-29 | 2012-02-15 | 本田技研工業株式会社 | Exhaust gas recycling system |
| CN101829649A (en) * | 2010-05-26 | 2010-09-15 | 浙江华立涂装设备有限公司 | Drying oven for spraying |
| KR101428542B1 (en) * | 2013-01-18 | 2014-08-11 | 주식회사 경동나비엔 | Combustor with air intake preheater |
| CN203147773U (en) * | 2013-02-20 | 2013-08-21 | 南通亿能彩钢板有限公司 | Direct heat supplying system by high-temperature incineration of waste gas |
| CN203980300U (en) * | 2014-07-08 | 2014-12-03 | 金继伟 | Adopt the off-gas oxidizing device of heat exchanger tube |
| CN205351348U (en) * | 2016-01-19 | 2016-06-29 | 周海波 | Film drying chamber gas catalysis nonflame heating VOC processing system |
| CN205332771U (en) * | 2016-01-22 | 2016-06-22 | 历升涂装设备(南京)有限公司 | Polyploid waste gas strile -backs and burns heated air circulation stove |
| GB2553563A (en) * | 2016-09-09 | 2018-03-14 | Richard Mcgee Donald | Apparatus for removing organic vapours from gaseous streams |
| CN106807191A (en) * | 2017-02-22 | 2017-06-09 | 郭满强 | One kind is for processing VOC gas method for pyrolysis |
| CN106731446A (en) * | 2017-02-22 | 2017-05-31 | 郭满强 | One kind is for processing VOC gas pyrolysis ovens |
| CN108644794A (en) * | 2018-05-13 | 2018-10-12 | 佛山市佳威节能环保设备有限公司 | A kind of improvement VOCs systems |
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| CN110094744A (en) * | 2018-05-13 | 2019-08-06 | 佛山市佳威节能环保设备有限公司 | A kind of energy-saving and emission-reduction system of binary channel processing gravure organic exhaust gas |
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| CN108644794A (en) | 2018-10-12 |
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| CN210398945U (en) | 2020-04-24 |
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