Energy-saving waste gas treatment system

Abstract

The utility model provides an energy-saving waste gas treatment system which comprises a waste gas inlet which is respectively provided with a low-concentration waste gas treatment channel and a high-concentration waste gas treatment channel which can be quickly switched; the waste gas inlet is connected with injection type plasma equipment through the low-concentration waste gas treatment channel, and an outlet of the injection type plasma equipment is connected with the waste gas outlet; the waste gas inlet is sequentially connected with a filtering device and a combustion device through the high-concentration waste gas treatment channel, and waste gas combusted by the combustion device enters the waste gas outlet through injection type plasma equipment. The energy-saving waste gas treatment system disclosed by the utility model solves the technical problem of relatively large energy waste caused by full-load operation of environment-friendly equipment when waste gas treatment equipment in related technologies treats low-concentration rubber processing waste gas.

Description

Technical Field

[0001] The utility model relates to the technical field of rubber processing waste gas, in particular to an energy-saving waste gas treatment system. Background Art

[0002] In the existing technology, the entire treatment process of rubber processing waste gas treatment equipment needs to go through multiple steps and is completed by multiple devices, such as dust removal fans, adsorption fans, RTO equipment, etc. In actual operation, the total installed capacity of rubber processing waste gas treatment equipment is about 280KW, and the average operation rate is about 280KW per hour.

[0003] However, in the actual production process, the rubber processing waste gas on site can be divided into high-concentration waste gas and low-concentration waste gas according to the VOC concentration. When processing low-concentration rubber, low-VOC concentration waste gas will be generated, and the full-load operation of environmental protection equipment will cause a large waste of energy.

[0004] Therefore, the prior art needs to be further developed. Utility Model Content

[0005] The purpose of this utility model is to overcome the above technical deficiencies and provide an energy-saving exhaust gas treatment system to solve the technical problem in the related technology that when the exhaust gas treatment equipment treats low-concentration rubber processing exhaust gas, the environmental protection equipment runs at full load, resulting in a large waste of energy.

[0006] In order to achieve the above technical objectives, the utility model adopts the following technical solutions: an energy-saving exhaust gas treatment system is provided, including: an exhaust gas inlet, the exhaust gas inlet is respectively provided with a low-concentration exhaust gas treatment channel and a high-concentration exhaust gas treatment channel that can be quickly switched; a low-concentration exhaust gas treatment channel, the exhaust gas inlet is connected to the injection type plasma equipment through the low-concentration exhaust gas treatment channel, and the outlet of the injection type plasma equipment is connected to the exhaust gas outlet; a high-concentration exhaust gas treatment channel, the exhaust gas inlet is connected to the filtering device and the combustion device in sequence through the high-concentration exhaust gas treatment channel, and the exhaust gas after combustion in the combustion device enters the exhaust gas outlet through the injection type plasma equipment.

[0007] Furthermore, the energy-saving exhaust gas treatment system includes a switching valve, and the exhaust gas inlet is connected to one of the low-concentration exhaust gas treatment channel or the high-concentration exhaust gas treatment channel via the switching valve.

[0008] Furthermore, the energy-saving exhaust gas treatment system includes a detection instrument for detecting exhaust gas concentration, and the detection instrument is located at the exhaust gas inlet.

[0009] Furthermore, the filtering device includes multiple, and the multiple filtering devices include: a dehumidification device, the air inlet of the dehumidification device is connected to the exhaust gas inlet; an oil removal device, the air inlet of the oil removal device is connected to the dehumidification device, and the oil removal device is used to remove oil, gas and dust in the exhaust gas; a multi-stage filter, the air inlet of the multi-stage filter is connected to the oil removal device, and the multi-stage filter is used to perform multi-stage filtration of the exhaust gas.

[0010] Furthermore, the plurality of filtering devices include a zeolite wheel device, and the zeolite wheel device is located between the multi-stage filter and the combustion device.

[0011] Furthermore, the zeolite rotor device includes: a first zeolite rotor device, the air outlet of the first zeolite rotor device is connected to the adsorption zone of the second zeolite rotor device, and the outlet of the desorption zone of the first zeolite rotor device is connected to the combustion device; a second zeolite rotor device, the air outlet of the second zeolite rotor device is connected to the combustion device, and the outlet of the desorption zone of the second zeolite rotor device is connected to the exhaust gas inlet.

[0012] Furthermore, the energy-saving waste gas treatment system also includes a spray tower, which is arranged before the waste gas inlet; wherein the waste gas inlet includes a pre-wash spray tower and an emulsion spray tower which are arranged in sequence.

[0013] Furthermore, the energy-saving waste gas treatment system also includes: a first dust removal device, which is located before the pre-wash spray tower; and a second dust removal device, which is located between the emulsion spray tower and the waste gas inlet.

[0014] Furthermore, the energy-saving exhaust gas treatment system includes an exhaust fan, which is located between the injection plasma equipment and the exhaust gas outlet, and the outlet of the exhaust fan faces the exhaust gas outlet.

[0015] Furthermore, the energy-saving exhaust gas treatment system also includes an air supply fan, which is located between the oil removal device and the multi-stage filter, and the air outlet of the air supply fan faces the multi-stage filter.

[0016] Beneficial effects:

[0017] The energy-saving waste gas treatment system includes two treatment channels, a low-concentration waste gas treatment channel and a high-concentration waste gas treatment channel. When the waste gas to be treated is of low concentration, the waste gas inlet is connected to the low-concentration waste gas treatment channel, and the waste gas at the waste gas inlet enters the injection plasma equipment and is decomposed before entering the waste gas outlet. When the waste gas to be treated is of high concentration, the waste gas inlet is connected to the high-concentration waste gas treatment channel, and the waste gas at the waste gas inlet is filtered and incinerated and decomposed, and then enters the injection plasma equipment and is decomposed before entering the waste gas outlet, so that the high-concentration waste gas can be deeply treated. When treating low-concentration waste gas, no deep treatment process is required, which can reduce the energy consumption of the entire system, so as to solve the technical problem in the related technology that when the waste gas treatment equipment treats low-concentration rubber processing waste gas, the environmental protection equipment runs at full load, resulting in a large waste of energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a structural diagram of the energy-saving exhaust gas treatment system used in the embodiment of the present utility model switching to a low-concentration exhaust gas treatment channel;

[0019] Figure 2 It is a structural diagram of the energy-saving exhaust gas treatment system used in the embodiment of the present utility model switching to a high-concentration exhaust gas treatment channel.

[0020] The above drawings include the following reference numerals:

[0021] 10. Low-concentration exhaust gas treatment channel; 20. High-concentration exhaust gas treatment channel; 1. Exhaust gas inlet; 11. First dust removal device; 2. Injection plasma equipment; 3. Exhaust gas outlet; 31. Exhaust fan; 4. Combustion device; 5. Dehumidification device; 6. Oil removal device; 61. Air supply fan; 7. Multi-stage filter; 8. Zeolite rotor equipment; 91. Pre-wash spray tower; 92. Emulsion spray tower. DETAILED DESCRIPTION

[0022] In order to enable those skilled in the art to better understand the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of this application.

[0023] According to the embodiment of the present invention, an energy-saving exhaust gas treatment system is provided. Figures 1 to 2, including: an exhaust gas inlet 1, the exhaust gas inlet 1 is respectively provided with a low-concentration exhaust gas treatment channel 10 and a high-concentration exhaust gas treatment channel 20 that can be quickly switched; the low-concentration exhaust gas treatment channel 10, the exhaust gas inlet 1 is connected to the injection type plasma equipment 2 through the low-concentration exhaust gas treatment channel 10, and the outlet of the injection type plasma equipment 2 is connected to the exhaust gas outlet 3; the high-concentration exhaust gas treatment channel 20, the exhaust gas inlet 1 is connected to the filtering device and the combustion device 4 in sequence through the high-concentration exhaust gas treatment channel 20, and the exhaust gas after combustion in the combustion device 4 enters the exhaust gas outlet 3 through the injection type plasma equipment 2.

[0024] Through the above-mentioned arrangement, the energy-saving waste gas treatment system includes two treatment channels, a low-concentration waste gas treatment channel 10 and a high-concentration waste gas treatment channel 20. When the waste gas to be treated is of low concentration, the waste gas inlet 1 is connected to the low-concentration waste gas treatment channel 10, and the waste gas of the waste gas inlet 1 enters the injection plasma equipment 2 and is decomposed before entering the waste gas outlet 3. When the waste gas to be treated is of high concentration, the waste gas inlet 1 is connected to the high-concentration waste gas treatment channel 20, and the waste gas of the waste gas inlet 1 is filtered and incinerated and decomposed, and then enters the injection plasma equipment 2 and is decomposed before entering the waste gas outlet 3, so that the high-concentration waste gas can be deeply treated, and no deep treatment process is required when treating low-concentration waste gas, which can reduce the energy consumption of the entire system, so as to solve the technical problem in the related technology that when the waste gas treatment equipment treats low-concentration rubber processing waste gas, the environmental protection equipment runs at full load, resulting in a large waste of energy.

[0025] It can be understood that when the exhaust gas to be treated is of low concentration, the filtering device and the combustion device 4 located on the high-concentration exhaust gas treatment channel 20 are both in a standby state.

[0026] In some embodiments, the combustion device 4 is an RTO system. The exhaust gas enters the RTO and is completely oxidized and burned into CO2 and H2O at a high temperature of 800°C. The treated exhaust gas is discharged through the main exhaust pipe in compliance with the standards.

[0027] In the energy-saving exhaust gas treatment system of this embodiment, see Figure 1 or Figure 2 The energy-saving exhaust gas treatment system includes a switching valve, through which the exhaust gas inlet 1 is connected to either the low-concentration exhaust gas treatment channel 10 or the high-concentration exhaust gas treatment channel 20. Through the above arrangement, rapid switching between the low-concentration exhaust gas treatment channel 10 and the high-concentration exhaust gas treatment channel 20 is achieved.

[0028] In the energy-saving exhaust gas treatment system of this embodiment, see Figure 1 or Figure 2 The energy-saving exhaust gas treatment system includes a detection instrument for detecting the exhaust gas concentration, and the detection instrument is located at the exhaust gas inlet 1. Through the above settings, after the exhaust gas passes through the detection instrument, the concentration of the exhaust gas is judged, and then the corresponding treatment channel is selected to be opened.

[0029] In some embodiments, the detection instrument is located at the rear end of the second dust removal device.

[0030] The energy-saving waste gas treatment system in this embodiment is applied to a mixing line. The detection instrument can be used to detect the VOC (volatile organic compound) concentration in the waste gas. The energy-saving waste gas treatment system controls the switching valve to switch channels according to the measured VOC concentration.

[0031] In some embodiments, the low concentration formulation is tentatively set to an inlet concentration of ≤50 mg / m 3 The formula has a VOC detection concentration of ≤50mg / m 3 The system determines that the exhaust gas is of low concentration; the VOC concentration is 50mg / m 3 -200mg / m 3 When the system determines that the exhaust gas is of medium concentration, the VOC concentration is 200mg / m 3 When the exhaust gas concentration is medium to high, the system automatically connects the exhaust gas inlet 1 to the high-concentration exhaust gas treatment channel 20. When the exhaust gas concentration is low, the system automatically connects the exhaust gas inlet 1 to the low-concentration exhaust gas treatment channel 10.

[0032] In the energy-saving exhaust gas treatment system of this embodiment, see Figure 1 or Figure 2 The filtering device includes multiple filtering devices, which are arranged in sequence: a dehumidification device 5, the air inlet of the dehumidification device 5 is connected to the exhaust gas inlet 1; an oil removal device 6, the air inlet of the oil removal device 6 is connected to the dehumidification device 5, and the oil removal device 6 is used to remove oil and dust in the exhaust gas; a multi-stage filter 7, the air inlet of the multi-stage filter 7 is connected to the oil removal device 6, and the multi-stage filter 7 is used to perform multi-stage filtration on the exhaust gas.

[0033] Specifically, moisture in the exhaust gas is removed by the dehumidification device 5 , thereby improving the subsequent combustion efficiency in the combustion device 4 .

[0034] Specifically, the oil and dust in the exhaust gas are removed by the oil removal device 6. The oil removal device 6 may be a powder spraying oil removal system, which sprays dust into the exhaust gas through a pre-powder spraying dust collector, thereby completing the primary pretreatment of the exhaust gas.

[0035] Specifically, after primary pretreatment by oil removal device 6, the exhaust gas enters multi-stage filter 7 for further pretreatment. Multi-stage filter 7 consists of three stages: an F7 filtration section, an activated carbon coarse filtration section, and an F9 filtration section. The F7 filtration section primarily removes residual dust, the activated carbon coarse filtration section primarily removes residual oil and gas in the exhaust gas, and the F9 filtration section removes small-size particulate matter, meeting the requirements for the zeolite wheel device 8.

[0036] In the energy-saving exhaust gas treatment system of this embodiment, see Figure 1 or Figure 2 , multiple filtering devices include a zeolite wheel device 8, which is located between the multi-stage filter 7 and the combustion device 4.

[0037] Specifically, the pretreated exhaust gas goes to the zeolite rotor device 8, and the VOCs components are captured by the rotor, so that the exhaust gas is further purified. The rotor rotates continuously, and the adsorption saturated part rotates to the desorption zone. The VOCs components are desorbed from the surface of the rotor under the blowing of 200°C hot air. After desorption, the rotor is cooled to room temperature and the adsorption performance is restored again.

[0038] In the energy-saving exhaust gas treatment system of this embodiment, see Figure 1 or Figure 2 The zeolite rotor device 8 includes a first zeolite rotor device, the outlet of which is connected to the adsorption zone of the second zeolite rotor device, and the outlet of the desorption zone of the first zeolite rotor device is connected to the combustion device 4; and a second zeolite rotor device, the outlet of which is connected to the combustion device 4, and the outlet of the desorption zone of the second zeolite rotor device is connected to the exhaust gas inlet 1. The arrangement of the first and second zeolite rotor devices forms a multi-stage filtration mechanism in the zeolite rotor device 8.

[0039] Specifically, the waste gas after desorption from the first zeolite wheel device enters the combustion device 4 for incineration, and the waste gas after desorption from the second zeolite wheel device returns to the waste gas inlet 1, merges with the waste gas to be treated, and re-enters the treatment process.

[0040] In the energy-saving exhaust gas treatment system of this embodiment, see Figure 1 or Figure 2 The energy-saving waste gas treatment system also includes a spray tower, which is arranged before the waste gas inlet 1; wherein, the waste gas inlet 1 includes a pre-wash spray tower 91 and an emulsion spray tower 92 which are arranged in sequence.

[0041] In the emulsion spray tower, as exhaust gas rises from the bottom, it encounters the sprayed water mist. The mist combines with particulate matter, alkaline gases, and acidic gases in the exhaust gas and is carried away by the water. The gas then passes through the packing layer, where it is further adsorbed or reacts with the adsorbents placed there. The mist is then separated by the demister at the top and transported through the emulsion spray tower outlet to the next step.

[0042] The emulsion was mainly studied in depth around the preparation method of emulsion that can absorb different types of VOCs waste gas, with a key breakthrough in the preparation method and application technology of emulsion for different types of VOCs waste gas. For the first time, the emulsion absorption process was combined with the spray tower system for efficient and reliable integration. Through experiments, the purification process and technology were continuously improved to achieve the optimal combination of emulsion and spray tower purification system.

[0043] In the energy-saving exhaust gas treatment system of this embodiment, see Figure 1 or Figure 2 The energy-saving exhaust gas treatment system further includes: a first dust removal device 11, which is located before the pre-wash spray tower 91; and a second dust removal device, which is located between the emulsion spray tower 92 and the exhaust gas inlet 1. Specifically, the exhaust gas is pre-treated by the first dust removal device 11 and the second dust removal device.

[0044] In the energy-saving exhaust gas treatment system of this embodiment, see Figure 1 or Figure 2 The energy-saving exhaust gas treatment system includes an exhaust fan 31, which is located between the injection plasma device 2 and the exhaust gas outlet 3, and the exhaust gas outlet 3 is oriented toward the exhaust gas outlet 3. By setting the exhaust fan 31, the treated exhaust gas is blown toward the exhaust gas outlet 3.

[0045] In the energy-saving exhaust gas treatment system of this embodiment, see Figure 1 or Figure 2 The energy-saving exhaust gas treatment system further includes an air supply fan 61, which is located between the oil removal device 6 and the multi-stage filter 7, and the air outlet of the air supply fan 61 is directed toward the multi-stage filter 7. By providing the air supply fan 61, the exhaust gas after oil removal is blown toward the multi-stage filter 7.

[0046] In some embodiments, the switching valve is linked to the start and stop of the mixing line; the fans in the energy-saving exhaust gas treatment system are all variable frequency fans, which automatically adjust the operating frequency according to the number of valve openings and pressure to achieve the goal of energy saving and consumption reduction.

[0047] In some embodiments, the exhaust gas outlet 3 is connected to the exhaust chimney, and an online monitor is provided at the connection between the two to monitor the treatment status of the exhaust gas in real time.

[0048] In some embodiments, the VOC detection concentration is ≤50 mg / m 3 The system defaults to low-concentration exhaust gas. The treatment process of the energy-saving exhaust gas treatment system is: "water washing spray + emulsion spray + plasma injection" process. The exhaust gas inlet 1 is connected to the low-concentration exhaust gas treatment channel 10, and the oil removal device 6, multi-stage filter 7, zeolite wheel equipment 8 and combustion device 4 are on standby and kept in a heat-insulating state.

[0049] During the treatment of low-concentration glue waste gas, the low-concentration waste gas is made to meet the standards through emulsion spraying and injection plasma dilution. The combustion device 4 is kept warm and on standby. The operating power of the combustion device 4 in the standby state is about 100kW. In addition, the air supply fan 61 after powder spraying and oil removal can also be turned off at this time.

[0050] When the VOC detection concentration is medium or high concentration exhaust gas, the energy-saving exhaust gas treatment system treatment process is: "water washing spray + emulsion spray + demisting and dehumidification + powder spraying and oil removal + multi-stage filtration + zeolite wheel filtration + RTO incineration decomposition + plasma injection" process, the exhaust gas inlet 1 is connected to the high concentration exhaust gas treatment channel 20, and when the VOC concentration is 200mg / m 3 When the RTO is about 100 kW, the operating power is about 150-200 kW.

[0051] In summary, the normal operating power of the combustion device 4 is about 200kW, and the standby operating power of the combustion device 4 is about 100kW, that is, after the low-concentration formula is switched to energy-saving, the combustion device 4 can save 100kW of energy per hour. At the same time, after the air supply fan 61 is turned off, energy can be saved by about 45kW per hour, so a total of 145kW is saved per hour. The energy-saving exhaust gas treatment system in this embodiment effectively reduces the energy consumption of the entire system, so as to solve the technical problem in the related technology that when the exhaust gas treatment equipment treats low-concentration rubber processing exhaust gas, the environmental protection equipment runs at full load, resulting in a large waste of energy.

[0052] In some embodiments, when the combustion device 4 fails, the exhaust gas is switched to the injection plasma device 2 in an emergency, which does not affect normal production. In addition, considering the performance of the injection plasma device, it is not recommended to produce white carbon black formula on the mixing line when switching to the emergency mode.

[0053] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequential order. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in a sequence other than those illustrated or described herein. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0054] Optionally, the specific examples in this embodiment may refer to the examples described in the above embodiments, and this embodiment will not be described in detail here.

[0055] The serial numbers of the above embodiments of the present application are for description only and do not represent the advantages or disadvantages of the embodiments.

[0056] In the above embodiments of the present application, the description of each embodiment has its own focus. For parts that are not described in detail in a certain embodiment, please refer to the relevant description of other embodiments.

[0057] The above is only a preferred embodiment of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.

Claims

1. An energy-saving waste gas treatment system, characterized in that: include: An exhaust gas inlet (1), wherein the exhaust gas inlet (1) is provided with a low-concentration exhaust gas processing channel (10) and a high-concentration exhaust gas processing channel (20) that can be quickly switched; The low-concentration waste gas treatment channel (10), the waste gas inlet (1) is connected to the injection type plasma device (2) through the low-concentration waste gas treatment channel (10), and the outlet of the injection type plasma device (2) is connected to the waste gas outlet (3); The high-concentration waste gas treatment channel (20), the waste gas inlet (1) is sequentially connected to a filtering device and a combustion device (4) through the high-concentration waste gas treatment channel (20), and the waste gas after combustion in the combustion device (4) enters the waste gas outlet (3) through the injection-type plasma equipment (2).

2. The energy-saving exhaust gas treatment system according to claim 1, characterized in that: The energy-saving exhaust gas treatment system comprises a switching valve, and the exhaust gas inlet (1) is connected to one of the low-concentration exhaust gas treatment channel (10) or the high-concentration exhaust gas treatment channel (20) via the switching valve.

3. The energy-saving exhaust gas treatment system according to claim 1, characterized in that: The energy-saving exhaust gas treatment system comprises a detection instrument for detecting exhaust gas concentration, and the detection instrument is located at the exhaust gas inlet (1).

4. The energy-saving exhaust gas treatment system according to claim 1, characterized in that: The filtering device includes a plurality of filtering devices, and the plurality of filtering devices include: a dehumidification device (5), wherein the air inlet of the dehumidification device (5) is in communication with the exhaust gas inlet (1); an oil removal device (6), wherein an air inlet of the oil removal device (6) is connected to the dehumidification device (5), and the oil removal device (6) is used to remove oil, gas and dust from the exhaust gas; A multi-stage filter (7), the air inlet of the multi-stage filter (7) is connected to the oil removal device (6), and the multi-stage filter (7) is used to perform multi-stage filtration on the exhaust gas.

5. The energy-saving exhaust gas treatment system according to claim 4, characterized in that: The plurality of filtering devices include a zeolite wheel device (8), which is located between the multi-stage filter (7) and the combustion device (4).

6. The energy-saving exhaust gas treatment system according to claim 5, characterized in that: The zeolite rotor device (8) comprises: a first zeolite rotor device, wherein the gas outlet of the first zeolite rotor device is connected to the adsorption zone of the second zeolite rotor device, and the outlet of the desorption zone of the first zeolite rotor device is connected to the combustion device (4); A second zeolite wheel device, wherein the gas outlet of the second zeolite wheel device is connected to the combustion device (4), and the outlet of the desorption zone of the second zeolite wheel device is connected to the exhaust gas inlet (1).

7. The energy-saving exhaust gas treatment system according to claim 1, characterized in that: The energy-saving waste gas treatment system further comprises a spray tower, which is arranged before the waste gas inlet (1); The waste gas inlet (1) includes a pre-wash spray tower (91) and an emulsion spray tower (92) which are arranged in sequence.

8. The energy-saving exhaust gas treatment system according to claim 7, characterized in that: The energy-saving exhaust gas treatment system further includes: a first dust removal device (11), the first dust removal device (11) being located before the pre-wash spray tower (91); A second dust removal device is located between the emulsion spray tower (92) and the exhaust gas inlet (1).

9. The energy-saving exhaust gas treatment system according to claim 1, characterized in that: The energy-saving waste gas treatment system comprises an exhaust fan (31), wherein the exhaust fan (31) is located between the injection plasma equipment (2) and the exhaust gas outlet (3), and the air outlet of the exhaust fan (31) faces the exhaust gas outlet (3).

10. The energy-saving exhaust gas treatment system according to claim 4, characterized in that: The energy-saving waste gas treatment system further comprises an air supply fan (61), wherein the air supply fan (61) is located between the oil removal device (6) and the multi-stage filter (7), and the air outlet of the air supply fan (61) faces the multi-stage filter (7).

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