Waste gas treatment system for reclaimed rubber production

Abstract

The utility model provides a kind of waste gas treatment system for reclaimed rubber production, belong to waste gas treatment technical field, including high-temperature waste gas discharge pipeline, pretreatment module, separation module and decomposition module, the air inlet end of pretreatment module is communicated with high-temperature waste gas discharge pipeline, the air inlet end of separation module is communicated with the air outlet end of pretreatment module, the air inlet end of decomposition module is communicated with the air outlet end of separation module, high-temperature waste gas is first passed into pretreatment module, pretreatment module carries out cooling, washing and removes dust to high-temperature waste gas, to output dust removal waste gas, avoid high-temperature, high dust waste gas to the loss of subsequent separation module, dust removal waste gas is then passed into separation module, separation module carries out oil mist separation to dust removal waste gas, to output oil removal waste gas, avoid oil-containing waste gas to the loss of subsequent decomposition module, finally oil removal waste gas is passed into decomposition module, decomposition module carries out catalytic oxidation decomposition pollutant to oil removal waste gas, finally obtains up-to-standard gas and is discharged.

Description

Technical Field

[0001] This utility model relates to the field of waste gas treatment technology, and in particular to a waste gas treatment system for the production of recycled rubber. Background Technology

[0002] The production of recycled rubber, especially in the mixing and vulcanization workshops, generates a large amount of complex waste gas. Although the concentration of pollutants in this waste gas is not high, the total emission volume is large, and it contains various malodorous substances such as industrial dust, sulfides, amines, H2S, NH3, CS2, mercaptans, and volatile organic compounds. These harmful components not only directly endanger the health of production workers, but also diffuse over long distances through the air, creating long-term and widespread malodorous pollution in the surrounding areas, causing continuous impacts on the factory area and the external environment, and easily leading to disturbances to residents. Therefore, the efficient collection and deep purification of rubber production waste gas has become an urgent task for enterprises to improve the working environment, fulfill their environmental responsibilities, and achieve green production.

[0003] In the prior art, for example, Chinese invention patent with authorization announcement number "CN115382344B" discloses a rubber fume treatment system, which includes an activated carbon adsorption box, a desorption and regeneration device, a spray tower, and an electrostatic oil fume purifier. The top of the spray tower is connected to a rubber fume duct, which is connected to the inlet of the electrostatic oil fume purifier. The activated carbon adsorption box is connected to an inlet pipe and a first discharge pipe. The inlet pipe is connected to the outlet of the electrostatic oil fume purifier, and both the inlet pipe and the first discharge pipe are equipped with a first valve. The desorption and regeneration device includes a heating chamber, a combustion chamber, and a first heat exchanger connected in sequence. The tube-side inlet of the first heat exchanger is connected to the combustion chamber. The tube-side outlet of the first heat exchanger is connected to the activated carbon adsorption box via a desorption hot gas inlet pipe. The activated carbon adsorption box is connected to the heating chamber via a desorption hot gas outlet pipe. Both the desorption hot gas inlet pipe and the desorption hot gas outlet pipe are equipped with a third valve. The combustion chamber is filled with a honeycomb precious metal catalyst, and the combustion chamber is connected to a second discharge pipe.

[0004] However, when using the aforementioned existing technology to treat the high-temperature exhaust gas generated by the desulfurization tank depressurization, the high-temperature exhaust gas will directly enter the spray tower for impact treatment. The huge temperature difference will cause some of the absorbent liquid in the spray tower to evaporate rapidly. This not only reduces the dust removal efficiency of the spray tower, but also carries a large amount of water vapor and unremoved dust into the subsequent electrostatic fume purifier. The unremoved dust will condense with the oil mist in the electrostatic field to form aerosols, and quickly adhere to the plates and wires, causing the electrostatic fume purifier to lose efficiency or even become completely blocked, which seriously affects the continuous and stable operation of the exhaust gas treatment system. Summary of the Invention

[0005] In view of this, it is necessary to provide a waste gas treatment system for recycled rubber production to solve the technical problem that when treating high-temperature waste gas generated by desulfurization tank depressurization, the high-temperature waste gas directly enters the spray tower for impact treatment. The huge temperature difference causes some of the absorbent liquid in the spray tower to evaporate rapidly, which not only reduces the dust removal efficiency of the spray tower, but also carries a large amount of water vapor and unremoved dust into the subsequent electrostatic fume purifier. The unremoved dust will condense with oil mist in the electrostatic field to form aerosols, which will quickly adhere to the plates and wires, causing the electrostatic fume purifier to lose efficiency or even become completely blocked, seriously affecting the continuous and stable operation of the waste gas treatment system.

[0006] The technical solution adopted by this utility model to solve its technical problem is:

[0007] This utility model provides a waste gas treatment system for recycled rubber production, including a high-temperature waste gas emission pipe, a pretreatment module, a separation module, and a decomposition module. The inlet of the pretreatment module is connected to the high-temperature waste gas emission pipe, and the pretreatment module is used to cool, wash, and remove dust from the high-temperature waste gas, and output dust-removed waste gas. The inlet of the separation module is connected to the outlet of the pretreatment module, and the separation module is used to separate oil mist from the dust-removed waste gas, and output oil-removed waste gas. The inlet of the decomposition module is connected to the outlet of the separation module, and the decomposition module is used to catalytically oxidize and decompose pollutants in the oil-removed waste gas, and discharge compliant gas.

[0008] Preferably, the pretreatment module includes a first spray tower and a bag filter. The bottom of the first spray tower is connected to the high-temperature exhaust gas pipeline, and the top of the first spray tower is connected to a first pipeline. The first pipeline is connected to the inlet of the bag filter, and the outlet of the bag filter is connected to a second pipeline. The second pipeline is connected to the air inlet of the separation module.

[0009] Preferably, the first spray tower includes a first spray tower body and a bottom cooling water tank. The bottom of the first spray tower body is connected to the high-temperature exhaust gas discharge pipe, and the top of the first spray tower body is connected to the first pipe. The first pipe is connected to the inlet of the bag filter. The first spray tower body is also provided with a coolant outlet and a first spray liquid inlet. The coolant outlet is located at the bottom of the first spray tower body and is connected to the bottom cooling water tank. The bottom cooling water tank is connected to the first spray liquid inlet through a pumping pipe so that the coolant at the bottom of the first spray tower body flows into the bottom cooling water tank for recooling. The coolant in the bottom cooling water tank is pumped to the first spray liquid inlet of the first spray tower body through the pumping pipe for cooling spraying.

[0010] Preferably, the bag filter includes a dust collector body and a pulse valve. An air inlet and an air outlet are respectively opened on opposite side walls of the dust collector body. A first pipe is connected to the air inlet, and the air outlet is connected to a second pipe. The dust collector body is divided into a bag chamber and a hopper chamber from top to bottom. A plurality of filter bags are arranged in the bag chamber. The air inlet is connected to the bottom of the bag chamber through a guide channel, and the air outlet is connected to the top of the bag chamber through the guide channel. The pulse valve is located at the top of the dust collector body and is used to blow compressed air into the filter bags of the bag chamber.

[0011] Preferably, the separation module includes a second spray tower and an oil fume purifier. The air outlet of the pretreatment module is connected to the bottom of the second spray tower. A third pipe is connected to the top of the second spray tower. The third pipe is connected to the inlet of the oil fume purifier. A fourth pipe is connected to the outlet of the oil fume purifier. The fourth pipe is connected to the air inlet of the decomposition module.

[0012] Preferably, the fume purifier includes a fume purifier body and a control cabinet. The control cabinet is located on one side of the fume purifier body. The third pipe is connected to the inlet of the fume purifier body, and the outlet of the fume purifier body is connected to the fourth pipe. At least one electrostatic field component is provided inside the fume purifier body. The electrostatic field component is electrically connected to the control cabinet. The electrostatic field component is used to generate an electrostatic field to capture small-diameter fume particles for oil mist separation.

[0013] Preferably, the decomposition module includes a primary filter, an activated carbon adsorption bed, a desorption mechanism, and an exhaust mechanism. The exhaust end of the separation module is connected to the inlet end of the primary filter, the exhaust end of the primary filter is connected to the top of the activated carbon adsorption bed, and the bottom of the activated carbon adsorption bed is connected to the desorption mechanism and the exhaust mechanism through two pipes respectively.

[0014] Preferably, the waste gas treatment system for recycled rubber production further includes a high-temperature waste gas recovery device, which is connected to the high-temperature waste gas emission pipeline through an inlet branch pipe. The high-temperature waste gas recovery device is used to convert the high-temperature waste gas into non-condensable gas for auxiliary combustion.

[0015] Preferably, the high-temperature exhaust gas recovery device comprises a condensation water tank, a cooling bent pipe, an oil recovery tank, a recovery pipeline and a combustion furnace, wherein the cooling bent pipe is coiled in the condensation water tank, the oil recovery tank is located below the condensation water tank, the intake branch pipe is in communication with the inlet of the cooling bent pipe, the outlet of the cooling bent pipe is in communication with the inlet of the oil recovery tank, the outlet of the oil recovery tank is in communication with the recovery pipeline, and the recovery pipeline is in communication with the combustion chamber of the combustion furnace, so that non-condensable gas is introduced into the combustion chamber of the combustion furnace for auxiliary combustion.

[0016] Preferably, the cooling bent pipe comprises at least one inverted U-shaped pipe, and the bent part of the inverted U-shaped pipe is transitioned by an arc pipe.

[0017] It can be seen from the above technical solutions that the exhaust gas treatment system for reclaimed rubber production provided by the present utility model comprises a high-temperature exhaust gas discharge pipeline, a pretreatment module, a separation module and a decomposition module, wherein the intake end of the pretreatment module is in communication with the high-temperature exhaust gas discharge pipeline, the intake end of the separation module is in communication with the outlet end of the pretreatment module, the intake end of the decomposition module is in communication with the outlet end of the separation module. When treating high-temperature exhaust gas generated by pressure relief of a desulfurization tank, the high-temperature exhaust gas is first introduced into the pretreatment module, which cools, washes and removes dust from the high-temperature exhaust gas, thereby outputting dust-removed exhaust gas, avoiding the loss of the subsequent separation module caused by high-temperature and high-dust exhaust gas; then the dust-removed exhaust gas is introduced into the separation module, which performs oil mist separation on the dust-removed exhaust gas, thereby outputting deoiled exhaust gas, avoiding the loss of the subsequent decomposition module caused by oil-containing exhaust gas; finally the deoiled exhaust gas is introduced into the decomposition module, which catalytically oxidizes and decomposes pollutants in the deoiled exhaust gas, and decomposes residual volatile organic compounds (VOC s ) and odorous substances into harmless carbon dioxide and water completely, and finally obtains standard-compliant gas for emission. Therefore, the present utility model sequentially removes different pollutants in high-temperature exhaust gas in a targeted manner through the pretreatment module, the separation module and the decomposition module, which not only ensures the cleanliness of the finally emitted gas, but also effectively protects each treatment module, and improves the continuity and stability of the operation of the treatment system. Description of Drawings

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the accompanying drawings required for the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some embodiments of the present utility model, and those skilled in the art can obtain other accompanying drawings based on these drawings without creative effort.

[0019] Figure 1 is a functional block diagram of the exhaust gas treatment system for reclaimed rubber production.

[0020] Figure 2 This is a top view of the waste gas treatment system used in the production of recycled rubber.

[0021] Figure 3 This is an isometric drawing of a portion of the waste gas treatment system used in the production of recycled rubber.

[0022] Figure 4 This is a cross-sectional view of the first spray tower.

[0023] Figure 5 This is the first sectional view of a bag filter.

[0024] Figure 6 This is a second sectional view of a bag filter.

[0025] Figure 7 This is a cross-sectional view of the second spray tower.

[0026] Figure 8 This is an isometric drawing of an oil fume purifier.

[0027] Figure 9 This is the isometric view of the decomposed module.

[0028] Figure 10 This is an isometric view of the high-temperature waste gas recovery device from the first angle.

[0029] Figure 11 This is an isometric view of the high-temperature waste gas recovery device from the second angle.

[0030] Figure 12 This is a schematic diagram of the cooling bend.

[0031] In the figure: 10, waste gas treatment system for reclaimed rubber production; 110, high-temperature waste gas discharge pipe; 120, pretreatment module; 121, first spray tower; 1211, first spray tower body; 12111, cooling liquid outlet; 12112, first spray liquid inlet; 1212, bottom cooling water tank; 122, bag filter; 1221, filter body; 12211, air inlet; 12212, air outlet; 12213, bag chamber; 12214, ash hopper chamber; 12215, flow guide channel; 12216, ventilation hole; 12217, cover plate; 1222, pulse valve; 123, first pipeline; 124, second pipeline; 130, separation module; 131, second spray tower; 1311, second spray tower body; 13111, circulating liquid outlet; 13112, second spray liquid inlet; 1312, bottom circulating water tank; 132, oil fume purifier; 1321, purifier body; 13211, electrostatic field assembly; 1322, control cabinet; 133, third pipeline; 134, fourth pipeline; 140, decomposition module; 141, primary filter; 142, activated carbon adsorption bed; 143, desorption mechanism; 144, exhaust mechanism; 150, high-temperature waste gas recovery device; 151, condensation water tank; 152, cooling bent pipe; 1521, n-shaped pipeline; 1522, arc pipeline; 153, oil liquid recovery tank; 154, recovery pipeline; 155, combustion furnace; 160, intake branch pipe. Detailed Description of Embodiments

[0032] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only part of the embodiments of the present utility model, not all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort shall fall within the protection scope of the present utility model.

[0033] In the description of the present utility model, it should be understood that the terms "upper", "middle", "outer", "inner", "lower" and other terms indicating orientation or positional relationship are only for facilitating the description of the present utility model and simplifying the description, rather than indicating or implying that the indicated components or elements must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation to the present utility model.

[0034] Please refer to Figures 1 to 3This utility model provides a waste gas treatment system 10 for recycled rubber production, including a high-temperature waste gas emission pipe 110, a pretreatment module 120, a separation module 130, and a decomposition module 140. The inlet of the pretreatment module 120 is connected to the high-temperature waste gas emission pipe 110. The pretreatment module 120 is used to cool, wash, and remove dust from the high-temperature waste gas, and output dust-removed waste gas to avoid damage to the subsequent separation module 130 caused by high-temperature and high-dust waste gas. The inlet of the separation module 130 is connected to the outlet of the pretreatment module 120. The separation module 130 is used to separate oil mist from the dust-removed waste gas and output oil-removed waste gas to avoid oil-containing waste gas. To minimize the wear and tear on the subsequent decomposition module 140, the inlet of the decomposition module 140 is connected to the outlet of the separation module 130. The decomposition module 140 is used to catalytically oxidize and decompose pollutants in the oil-removed waste gas, completely decomposing the residual volatile organic compounds (VOCs) and malodorous substances in the waste gas into harmless carbon dioxide and water, and emitting compliant gas. In this way, the pretreatment module 120, the separation module 130, and the decomposition module 140 sequentially remove different pollutants from the high-temperature waste gas, ensuring not only the cleanliness of the final emitted gas but also effectively protecting each treatment module and improving the continuity and stability of the treatment system operation.

[0035] For further details, please refer to Figures 4 to 6 The pretreatment module 120 includes a first spray tower 121 and a bag filter 122. The bottom of the first spray tower 121 is connected to the high-temperature exhaust gas discharge pipe 110, and the top of the first spray tower 121 is connected to a first pipe 123, which is connected to the inlet of the bag filter 122. The outlet of the bag filter 122 is connected to a second pipe 124, which is connected to the air inlet of the separation module 130. Specifically, the first spray tower 121 uses coolant to directly cool and rapidly cool the high-temperature exhaust gas. Subsequently, the bag filter 122 performs deep filtration on the pre-cooled exhaust gas, efficiently capturing fine dust, forming a stepped combination of "cooling + fine filtration". This makes the dust removal efficiency of the pretreatment module 120 far exceed that of a single device, effectively eliminating the temperature and dust load in the exhaust gas.

[0036] Furthermore, the first spray tower 121 includes a first spray tower body 1211 and a bottom cooling water tank 1212. The bottom of the first spray tower body 1211 is connected to the high-temperature exhaust gas discharge pipe 110, and the top of the first spray tower body 1211 is connected to a first pipe 123, which is connected to the inlet of the bag filter 122. The first spray tower body 1211 is also provided with a coolant outlet 12111 and a first spray liquid inlet 12112. The coolant outlet 12111 is located at the bottom of the first spray tower body 1211 and is connected to the bottom cooling water tank 1212. The bottom cooling water tank 1212 is connected to the first spray liquid inlet 12112 through a pumping pipe so that the coolant at the bottom of the first spray tower body 1211 flows into the bottom cooling water tank 1212. For further cooling, the coolant in the bottom cooling water tank 1212 is pumped through a pumping pipe to the first spray liquid inlet 12112 of the first spray tower body 1211 for cooling spraying. When the first spray tower 121 treats high-temperature exhaust gas, the high-temperature exhaust gas enters from the bottom of the first spray tower body 1211. The coolant in the bottom cooling water tank 1212 is pumped through a pumping pipe to the first spray liquid inlet 12112 at the top of the first spray tower body 1211. This allows the coolant to spray the high-temperature exhaust gas from top to bottom in the first spray tower body 1211, making full countercurrent contact with the high-temperature exhaust gas entering from the bottom of the first spray tower body 1211. After cooling and washing, the coolant flows back to the bottom cooling water tank 1212 for further cooling, thus forming a continuous cycle and greatly reducing the amount of cooling water discharged.

[0037] In a preferred embodiment, there may be two first spray liquid inlets 12112, one of which is located in the middle of the first spray tower body 1211 and the other is located at the top of the first spray tower body 1211, thereby forming a middle spray layer and a top spray layer within the first spray tower body 1211. This allows the high-temperature exhaust gas and coolant to come into contact in layers, improving the heat exchange efficiency between the high-temperature exhaust gas and the coolant and ensuring that the high-temperature exhaust gas can be cooled to a safe temperature range.

[0038] Furthermore, to ensure the long-term stable operation of the bag filter 122 without clogging and to provide a clean air source for subsequent waste gas treatment, the bag filter 122 includes a dust collector body 1221 and a pulse valve 1222. An inlet 12211 and an outlet 12212 are respectively opened on opposite side walls of the dust collector body 1221. A first pipe 123 is connected to the inlet 12211, and a second pipe 124 is connected to the outlet 12212. The dust collector body 1221 is divided from top to bottom into a bag chamber 12213 and a hopper chamber 12214. Several filter bags are installed in the bag chamber 12213. The inlet 12211 is connected to the bottom of the bag chamber 12213 through a guide channel 12215, and the outlet 12212 is connected to the bottom of the bag chamber 12213 through the guide channel. 12215 is connected to the top of bag chamber 12213, allowing exhaust gas to enter bag chamber 12213 from the bottom, pass through the filter bag upwards, and be discharged from the outlet 12212. This helps dust to adhere evenly to the surface of the filter bag and effectively captures submicron fine dust. Pulse valve 1222 is located at the top of dust collector body 1221. Pulse valve 1222 is used to instantly inject compressed air into the filter bag of bag chamber 12213. The airflow of compressed air will cause the filter bag to expand and shake violently, forming a reverse impact from the inside to the outside, thereby completely peeling off the dust cake layer attached to the outer surface of the filter bag. The shaken-off dust falls directly into the ash hopper 12214 below under the action of gravity, thus completing efficient dust removal and ensuring that the filter bag continues to have good filtration performance.

[0039] In a preferred embodiment, the top of the flow channel 12215 is provided with a plurality of ventilation holes 12216 communicating with the bag chamber 12213. Each ventilation hole 12216 is provided with a cover plate 12217 above it. The cover plate 12217 is adapted to the size of the ventilation hole 12216 and covers the ventilation hole 12216. The opening and closing between the air outlet 12212 and the bag chamber 12213 is controlled by driving the cover plate 12217 to rise or fall by a telescopic cylinder. When the pulse valve 1222 sprays compressed air into the filter bag of the bag chamber 12213 for dust cleaning, the cover plate 12217 is driven to fall by the telescopic cylinder so that the cover plate 12217 covers the ventilation hole 12216, thereby preventing the dust of the filter bag in the bag chamber 12213 from being discharged from the air outlet 12212 into the subsequent separation module 130.

[0040] Furthermore, to completely eliminate the risk of pollution and toxicity to subsequent decomposition modules from oily components in the dust removal exhaust gas, please refer to... Figures 7 to 8The separation module 130 includes a second spray tower 131 and an oil fume purifier 132. The outlet of the pretreatment module 120 is connected to the bottom of the second spray tower 131. Specifically, a second pipe 124 is connected to the bottom of the second spray tower 131, and a third pipe 133 is connected to the top of the second spray tower 131. The third pipe 133 is connected to the inlet of the oil fume purifier 132, and the outlet of the oil fume purifier 132 is connected to a fourth pipe 134. The fourth pipe 134 is connected to the inlet of the decomposition module 140. Specifically, the second spray tower 131 uses a specific absorbent (such as an alkaline solution or a special emulsion) to perform secondary washing on the dust removal exhaust gas, removing part of the dust through chemical absorption. The first spray tower 121 uses a lower liquid-to-gas ratio for spraying, which aims to precisely control the humidity of the exhaust gas. If the humidity of the exhaust gas is too high, condensation will easily occur in the fume purifier 132, leading to short circuits in the electric field and corrosion. If the exhaust gas is too dry, it will not be conducive to the charging of oil mist and will affect the collection efficiency. Therefore, by stabilizing the humidity within a suitable range, the aforementioned risks can be avoided, and the conductivity of the exhaust gas can be enhanced by water vapor, thereby improving the removal efficiency of the electrostatic field for fine particulate matter. In contrast, the first spray tower 121 needs to use a higher liquid-to-gas ratio for spraying to maximize the heat exchange efficiency and quickly reduce the temperature of the high-temperature exhaust gas to a safe temperature range.

[0041] Furthermore, to improve the utilization rate of the absorbent liquid in the second spray tower 131, the second spray tower 131 includes a second spray tower body 1311 and a bottom circulating water tank 1312. The bottom of the second spray tower body 131 is connected to the second pipe 124, and the top of the second spray tower body 131 is connected to a third pipe 133, which is connected to the inlet of the fume purifier 132. The second spray tower body 131 is also provided with a circulating liquid outlet 13111 and a second spray liquid inlet 13112. The circulating liquid outlet 13111 is located at the bottom of the first spray tower body 1211 and is connected to the bottom circulating water tank 1312. The bottom circulating water tank 1312 is connected to the first spray tower body 1211 by a pump. The delivery pipeline is connected to the second spray liquid inlet 13112. When the second spray tower 131 treats the dust removal exhaust gas, the dust removal exhaust gas enters from the bottom of the second spray tower 131 body. The absorbent liquid in the bottom circulating water tank 1312 is pumped to the second spray liquid inlet 13112 at the top of the second spray tower 131 body through the pump pipeline. This allows the absorbent liquid to spray the dust removal exhaust gas from top to bottom in the second spray tower 131 body, and to have sufficient countercurrent contact with the dust removal exhaust gas entering from the bottom of the second spray tower 131 body. After washing, the absorbent liquid flows back to the bottom circulating water tank 1312, thus forming a continuous cycle. This allows the limited absorbent liquid to be reused repeatedly, greatly reducing the frequency of absorbent liquid replenishment.

[0042] Similarly, there are two second spray liquid inlets 13112. One second spray liquid inlet 13112 is located in the middle of the body of the second spray tower 131, and the other second spray liquid inlet 13112 is located at the top of the body of the second spray tower 131. This forms a middle spray layer and a top spray layer within the body of the second spray tower 131, allowing the dust removal exhaust gas and the absorption liquid to come into contact in layers, increasing the contact probability between the dust removal exhaust gas and the absorption liquid, and reducing the risk of dust removal exhaust gas escaping.

[0043] Furthermore, the fume purifier 132 includes a fume purifier body 1321 and a control cabinet 1322. The control cabinet 1322 is located on one side of the fume purifier body 132. A third pipe 133 is connected to the inlet of the fume purifier body 132, and a fourth pipe 134 is connected to the outlet of the fume purifier body 132. The fourth pipe 134 is connected to the air inlet of the decomposition module 140. Two electrostatic field components 13211 are provided inside the fume purifier body, and both electrostatic field components 13211 are electrically connected to the control cabinet 1322. Used to generate an electrostatic field to capture small-diameter oil fume particles for oil mist separation. When the exhaust gas discharged from the second spray tower 131 enters the body of the oil fume purifier 132, the control cabinet 1322 applies high-voltage DC power to the electrostatic field component 13211. The electrostatic field component 13211 generates a high-voltage electrostatic field. Under the action of the high-voltage electric field, the oil mist droplets in the exhaust gas become charged. The tiny oil mist droplets move towards the positive and negative plates of the electric field under the action of the electric field force and airflow and are collected on the plates. Under the action of their own gravity, they flow to the oil collection tray of the oil fume purifier 132 and are discharged through the oil outlet of the oil collection tray.

[0044] For further details, please refer to Figure 9The decomposition module 140 includes a primary filter 141, an activated carbon adsorption bed 142, a desorption mechanism 143, and an exhaust mechanism 144. The outlet of the separation module 130 is connected to the inlet of the primary filter 141. Specifically, the fourth pipe 134 is connected to the inlet of the primary filter 141, and the outlet of the primary filter 141 is connected to the top of the activated carbon adsorption bed 142. The bottom of the activated carbon adsorption bed 142 is connected to the desorption mechanism 143 and the exhaust mechanism 144 through two pipes respectively. The primary filter 141 adopts a three-stage series design of "primary filter layer + medium filter layer + high efficiency filter layer", and the material of each filter layer is precisely matched with the interception particle size: breaking through the problem of insufficient precision of traditional single filtration, realizing step-by-step filtration from coarse to fine, avoiding dust clogging of activated carbon or contaminating the catalyst, and extending the life of core components. The activated carbon adsorption bed 142 includes four parallel activated carbon adsorption boxes, each adsorption box is independently equipped with a "desorption initial valve" and a "desorption return valve". The system can switch between single-chamber and multi-chamber configurations via valve control (e.g., while some chambers desorb, the remaining chambers continue adsorption), ensuring continuous system operation and overcoming the efficiency bottleneck of "shutdown desorption" in traditional single-bed designs; the adsorption capacity of a single chamber reaches 10,000 m³ / h. 3 / h, multiple boxes in parallel significantly improve the overall processing capacity. The desorption mechanism 143 adopts a collaborative design of "electric heater + palladium catalyst + multi-stage fan": the electric heater operates at a temperature of 300-350℃, which can heat the desorbed gas to 220-250℃ (catalytic reaction initiation temperature); the palladium catalyst can activate the oxidation-reduction reaction of organic matter and oxygen at around 220℃, decomposing it into CO2 and H2O (harmless products); the primary and secondary desorption fans work together with the exhaust fan to form a stable airflow, ensuring that the hot air circulates fully in the desorption circuit, improving the desorption and decomposition efficiency.

[0045] In this utility model, the primary filter 141, the activated carbon adsorption bed 142, the desorption mechanism 143, and the exhaust mechanism 144 can all adopt existing technologies. For example, Chinese invention patent application number "202511235630.1" discloses an industrial waste gas treatment device and application method.

[0046] Furthermore, existing treatment methods typically result in products rich in combustible VOCs. s Treating high-temperature exhaust gas as pure pollutants and directly discharging it after filtration and purification essentially treats a potential energy source as waste, resulting in significant resource waste. To solve this problem, please refer to... Figures 10 to 12 The waste gas treatment system 10 for recycled rubber production also includes a high-temperature waste gas recovery device 150. The high-temperature waste gas recovery device 150 is connected to the high-temperature waste gas emission pipe 110 through an air inlet branch pipe 160. The high-temperature waste gas recovery device 150 is used to convert high-temperature waste gas into non-condensable gas for auxiliary combustion.

[0047] Specifically, the high-temperature exhaust gas recovery device 150 comprises a condensing water tank 151, a cooling bent pipe 152, an oil-liquid recovery tank 153, a recovery pipeline 154 and a combustion furnace 155. The cooling bent pipe 152 is coiled in the condensing water tank 151, the oil-liquid recovery tank 153 is located below the condensing water tank 151, an intake branch pipe 160 communicates with an inlet of the cooling bent pipe 152, an outlet of the cooling bent pipe 152 communicates with an inlet of the oil-liquid recovery tank 153, an outlet of the oil-liquid recovery tank 153 communicates with the recovery pipeline 154, and the recovery pipeline 154 communicates with a combustion chamber of the combustion furnace 155, so that non-condensable gas is introduced into the combustion chamber of the combustion furnace 155 for auxiliary combustion. High-temperature exhaust gas is introduced into the cooling bent pipe 152 coiled in the condensing water tank 151 through the intake branch pipe 160, so that the high-temperature exhaust gas and circulating condensed water in the condensing water tank 151 perform high-efficiency heat exchange, prompting oily components in the high-temperature exhaust gas to condense and liquefy to form oil and non-condensable gas. The oil flows into the oil-liquid recovery tank 153 below under the guidance of the non-condensable gas for separation, and the combustible VOC-rich s non-condensable gas is introduced into the combustion chamber of the combustion furnace 155 through the recovery pipeline 154, and is used as an auxiliary fuel to realize resource utilization. Meanwhile, condensed water heated during heat exchange can be used as a heat source for circulating systems such as plant area heating, thereby realizing waste heat recovery.

[0048] Further, the cooling bent pipe 152 comprises at least one zigzag-shaped pipeline 1521, and the bent part of the zigzag-shaped pipeline 1521 is transited by an arc pipeline 1522. Specifically, three zigzag-shaped pipelines 1521 form one group, and four groups of zigzag-shaped pipelines 1521 are stacked in the condensing water tank 151. An outlet of the intake branch pipe 160 is provided with four interfaces, and the four interfaces at the outlet of the intake branch pipe 160 respectively communicate with inlets of the four groups of zigzag-shaped pipelines 1521 in a one-to-one correspondence. Correspondingly, an inlet of the recovery pipeline 154 is provided with four interfaces, and the four interfaces at the inlet of the recovery pipeline 154 respectively communicate with outlets of the four groups of zigzag-shaped pipelines 1521 in a one-to-one correspondence. Control valves are arranged on both the intake branch pipe 160 and the recovery pipeline 154 to control the on-off of the intake branch pipe 160 and the recovery pipeline 154.

[0049] What is disclosed above is only preferred embodiments of the present utility model. Certainly, the scope of rights of the present utility model cannot be limited thereby. A person skilled in the art can understand all or part of the processes for implementing the above embodiments, and equivalent changes made according to the claims of the present utility model still fall within the scope covered by the utility model.

Claims

1. A waste gas treatment system for recycled rubber production, characterized in that: The system includes a high-temperature exhaust gas emission pipe, a pretreatment module, a separation module, and a decomposition module. The inlet of the pretreatment module is connected to the high-temperature exhaust gas emission pipe. The pretreatment module is used to cool, wash, and remove dust from the high-temperature exhaust gas, and output dust-removed exhaust gas. The inlet of the separation module is connected to the outlet of the pretreatment module. The separation module is used to separate oil mist from the dust-removed exhaust gas and output oil-removed exhaust gas. The inlet of the decomposition module is connected to the outlet of the separation module. The decomposition module is used to catalytically oxidize and decompose pollutants in the oil-removed exhaust gas and emit compliant gas.

2. The waste gas treatment system for recycled rubber production according to claim 1, characterized in that: The pretreatment module includes a first spray tower and a bag filter. The bottom of the first spray tower is connected to the high-temperature exhaust pipe, and the top of the first spray tower is connected to a first pipe. The first pipe is connected to the inlet of the bag filter, and the outlet of the bag filter is connected to a second pipe. The second pipe is connected to the air inlet of the separation module.

3. The waste gas treatment system for recycled rubber production according to claim 2, characterized in that: The first spray tower includes a first spray tower body and a bottom cooling water tank. The bottom of the first spray tower body is connected to the high-temperature exhaust gas emission pipe, and the top of the first spray tower body is connected to the first pipe, which is connected to the inlet of the bag filter. The first spray tower body is also provided with a coolant outlet and a first spray liquid inlet. The coolant outlet is located at the bottom of the first spray tower body and is connected to the bottom cooling water tank. The bottom cooling water tank is connected to the first spray liquid inlet through a pumping pipe so that the coolant at the bottom of the first spray tower body flows into the bottom cooling water tank for recooling. The coolant in the bottom cooling water tank is pumped to the first spray liquid inlet of the first spray tower body through the pumping pipe for cooling spraying.

4. The waste gas treatment system for recycled rubber production according to claim 2, characterized in that: The baghouse dust collector includes a dust collector body and a pulse valve. An air inlet and an air outlet are respectively opened on opposite side walls of the dust collector body. A first pipe is connected to the air inlet, and the air outlet is connected to a second pipe. The dust collector body is divided into a bag chamber and a hopper chamber from top to bottom. A number of filter bags are arranged in the bag chamber. The air inlet is connected to the bottom of the bag chamber through a guide channel, and the air outlet is connected to the top of the bag chamber through the guide channel. The pulse valve is located at the top of the dust collector body and is used to blow compressed air into the filter bags in the bag chamber.

5. The waste gas treatment system for recycled rubber production according to claim 1, characterized in that: The separation module includes a second spray tower and an oil fume purifier. The air outlet of the pretreatment module is connected to the bottom of the second spray tower. A third pipe is connected to the top of the second spray tower and is connected to the inlet of the oil fume purifier. A fourth pipe is connected to the outlet of the oil fume purifier and is connected to the air inlet of the decomposition module.

6. The waste gas treatment system for recycled rubber production according to claim 5, characterized in that: The lampblack purifier comprises a lampblack purifier body and a control cabinet, wherein the control cabinet is arranged on one side of the lampblack purifier body, the third pipeline communicates with an inlet of the lampblack purifier body, an outlet of the lampblack purifier body is connected with the fourth pipeline, at least one electrostatic field component is arranged in the lampblack purifier body, the electrostatic field component is electrically connected with the control cabinet, and the electrostatic field component is used for generating an electrostatic field to capture small-particle-size lampblack particles for oil-gas separation.

7. The waste gas treatment system for recycled rubber production according to claim 1, characterized in that: The decomposition module comprises a primary filter, an activated carbon adsorption bed, a desorption mechanism and an exhaust mechanism, wherein a gas outlet end of the separation module communicates with a gas inlet end of the primary filter, a gas outlet end of the primary filter communicates with the top of the activated carbon adsorption bed, and the bottom of the activated carbon adsorption bed communicates with the desorption mechanism and the exhaust mechanism respectively through two pipelines.

8. The waste gas treatment system for recycled rubber production according to claim 1, characterized in that: The waste gas treatment system for reclaimed rubber production further comprises a high-temperature waste gas recovery device, wherein the high-temperature waste gas recovery device communicates with the high-temperature waste gas discharge pipeline through an intake branch pipe, and the high-temperature waste gas recovery device is used for converting high-temperature waste gas into non-condensable gas for auxiliary combustion.

9. The waste gas treatment system for recycled rubber production according to claim 8, characterized in that: The high-temperature waste gas recovery device comprises a condensation water tank, a cooling bent pipe, an oil-liquid recovery tank, a recovery pipeline and a combustion furnace, wherein the cooling bent pipe is coiled in the condensation water tank, the oil-liquid recovery tank is located below the condensation water tank, the intake branch pipe communicates with an inlet of the cooling bent pipe, an outlet of the cooling bent pipe communicates with an inlet of the oil-liquid recovery tank, an outlet of the oil-liquid recovery tank communicates with the recovery pipeline, and the recovery pipeline communicates with a combustion chamber of the combustion furnace, so that non-condensable gas is introduced into the combustion chamber of the combustion furnace for auxiliary combustion.

10. The waste gas treatment system for recycled rubber production according to claim 9, characterized in that: The cooling bent pipe at least comprises an inverted U-shaped pipeline, and bent parts of the inverted U-shaped pipeline are in transition through arc-shaped pipelines.

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