VOCs waste gas treatment device and method for coke oven

Abstract

The VOCs waste gas treatment device comprises a gas inlet pipe, a gas exhaust pipe, a first heat storage chamber, a second heat storage chamber and a combustion chamber, a plurality of supporting plates are arranged in the first heat storage chamber and the second heat storage chamber, a plurality of ventilation grooves are formed in the supporting plates, heat storage ceramics are arranged on the ventilation grooves, and the heat storage ceramics are arranged in the combustion chamber. First adjusting boxes are arranged on one side of the first heat storage chamber and one side of the second heat storage chamber, a plurality of first adjusting plates are arranged in the first adjusting boxes, first push plates are arranged in the first adjusting boxes, second adjusting boxes are arranged on the other side of the first heat storage chamber and the other side of the second heat storage chamber, a plurality of second adjusting plates are arranged in the second adjusting boxes, and second push plates are arranged in the second adjusting boxes. According to the design of the heat storage chamber and the combustion chamber, the mode of heat storage and heat release of heat storage ceramics can be utilized, waste heat of combustion is recycled, newly-entering waste gas is automatically heated, waste gas treatment is achieved, meanwhile, fuel needed in the waste gas heating process is reduced, and energy conservation, emission reduction, carbon reduction and efficiency improvement are achieved.

Description

Technical Field

[0001] The present invention belongs to the technical field of waste gas treatment, and in particular relates to a VOCs waste gas treatment device for a coke oven and a method thereof. Background Art

[0002] Coke ovens are key production facilities in the coking process. During the coke oven production process, flue gases containing dust and VOCs are continuously or intermittently generated from the coke oven door, the bottom of the riser, the coal loading hole on the oven roof, and the fire-viewing hole. These VOCs have a complex composition and include various volatile organic compounds, such as benzene, toluene, and xylene.

[0003] When treating VOCs waste gas, combustion is usually used to treat the waste gas. However, the inventors found that in the combustion purification process of the existing treatment methods, most devices lack an efficient heat recovery mechanism, and a large amount of heat in the high-temperature flue gas is directly dissipated, resulting in a huge waste of energy, increasing the production costs of enterprises, and serious energy waste.

[0004] Therefore, the existing structure and deficiencies are studied and improved, and a VOCs waste gas treatment device and method for coke oven are provided, in order to achieve a more practical purpose. Summary of the Invention

[0005] In response to at least one problem in the prior art, an object of the present invention is to provide a VOCs waste gas treatment device for a coke oven and a method thereof.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] A VOCs waste gas treatment device for a coke oven comprises a multi-pollutant collaborative treatment device, a waste heat recovery boiler, a desulfurization device and a bag dust removal device. The waste gas is treated by the multi-pollutant collaborative treatment device, desulfurized by the desulfurization device, and then discharged after dust removal by the bag dust removal device. The waste heat recovery boiler is used to recover and utilize heat in the gas treated by the multi-pollutant collaborative treatment device. The multi-pollutant collaborative treatment device comprises an air intake pipe, an exhaust pipe, a first heat storage chamber, a second heat storage chamber and a combustion chamber. The combustion chamber is connected to the upper ends of the first heat storage chamber and the second heat storage chamber. The air intake pipe is provided with an air intake branch pipe respectively connected to the air intake ends at the bottom of the first heat storage chamber and the second heat storage chamber. The exhaust pipe is provided with an exhaust branch pipe respectively connected to the exhaust ends at the bottom of the first heat storage chamber and the second heat storage chamber. Control pipes are provided in both the air intake branch pipe and the exhaust branch pipe. The valve is provided with a plurality of fixedly connected support plates in the first heat storage chamber and the second heat storage chamber, and the support plates are provided with a plurality of long ventilation slots for air flow through, and the ventilation slots are provided with evenly distributed and rectangular heat storage ceramics. The first heat storage chamber and the second heat storage chamber are both provided with a first regulating box connected on one side, and a plurality of first regulating plates corresponding to the support plates and movable back and forth are provided in the first regulating box, and a first push plate movable back and forth and used for pushing the heat storage ceramics is provided in the first regulating box. The first heat storage chamber and the second heat storage chamber are both provided with a second regulating box connected on the other side, and a plurality of second regulating plates corresponding to the support plates and movable back and forth are provided in the second regulating box, and a second push plate movable back and forth and used for pushing the heat storage ceramics is provided in the second regulating box, and the first push plates and the second push plates are staggered.

[0008] Preferably, limit grooves are provided on both sides of the support plate, and a sliding limit plate is provided in the limit groove, and the limit plates are fixedly connected to the corresponding first adjustment plate and the second adjustment plate respectively. A rotatable reciprocating screw is provided in the limit groove, and a through-type limit hole is provided on the limit plate, and the limit hole is matched with the reciprocating screw.

[0009] Preferably, the bottom of the first regulating box and the second regulating box are both provided with a driving motor, the output end of the driving motor is provided with a conveying shaft, the end of the reciprocating screw is provided with a fixedly connected turbine, and the conveying shaft is provided with a worm fixedly connected and matched with the turbine.

[0010] Preferably, a first hydraulic rod is fixedly connected in the first adjustment box, and the first hydraulic rod is fixedly connected to the first push plate. A second hydraulic rod is fixedly connected in the second adjustment box, and the second hydraulic rod is fixedly connected to the second push plate.

[0011] Preferably, the first adjustment plate is provided with a plurality of suction grooves for sucking impurities from the bottom of the heat storage ceramic, a suction fan is provided between the first heat storage chamber and the second heat storage chamber, the output end of the suction fan is provided with a delivery pipe, the delivery pipe is connected to the combustion chamber, the air inlet end of the suction fan is provided with a suction pipe, and the suction pipe is connected to the suction grooves.

[0012] Preferably, a suction hole is provided at one end of the first adjustment plate, a connecting groove connected to the suction hole is provided on the side wall of the suction groove, and a connected and retractable suction branch pipe is provided at the end of the suction hole, and the suction branch pipes are respectively connected to the corresponding suction pipes.

[0013] Preferably, the support plates located at both ends of the ventilation slot are each provided with a first slide fixedly connected thereto, the first adjustment plate and the second adjustment plate are each provided with a second slide fixedly connected thereto and corresponding to the first slide, and the bottom of the heat storage ceramic is provided with a sliding groove slidably connected to the first slide and the second slide.

[0014] Preferably, each of the second slide plates is provided with a rotatable roller for driving the heat storage ceramic to move.

[0015] Preferably, adjacent rollers are connected by chains, and upper and lower adjacent rollers are connected by chains. The first adjustment plate and the second adjustment plate are both provided with a first motor, and the output end of the first motor is connected to one of the rollers.

[0016] A method for treating VOCs waste gas from a coke oven, using the VOCs waste gas treatment device for a coke oven, comprises the following steps:

[0017] S1 passes the exhaust gas into the first regenerator through the intake pipe and the intake branch pipe, and then enters the combustion chamber through the first regenerator for combustion. After combustion, the hot air flows through the heat storage ceramics of the second regenerator and enters the exhaust pipe through the exhaust branch pipe for discharge;

[0018] During the intake process of S2, the airflow enters the bottom of the second heat storage chamber by switching the control valve, and then passes through the heat storage ceramic and enters the combustion chamber for combustion. Since the heat storage ceramic stores a certain amount of heat when the hot air flows through the heat storage ceramic in step S1, the heat storage ceramic can heat the airflow after the airflow passes through the heat storage ceramic, so that the waste heat in the airflow after combustion can be recovered to reduce the exhaust temperature. At the same time, the airflow of the intake can be heated to save the fuel consumption in the process of heating the exhaust gas. The airflow after combustion passes through the first heat storage chamber and the heat storage ceramic in the first heat storage chamber. The heat storage ceramic can recover the heat in the airflow after combustion and finally discharge it through the exhaust pipe. By switching back and forth in this way, the first heat storage chamber and the second heat storage chamber perform the process of heat storage and heat release in turn, and work alternately continuously.

[0019] S3 is a process in which the heat storage ceramic stores or releases heat. By controlling the pushing of the first push plate, the heat storage ceramic on the first adjusting plate is pushed toward one side of the support plate, so that the heat storage ceramic on the other side of the support plate enters the corresponding second adjusting plate. Then, the second adjusting plate is controlled to move the second adjusting plate to the second push plate, and the second push plate is controlled to push the heat storage ceramic on the second adjusting plate onto the support plate, and the heat storage ceramic on the other side is squeezed and pushed onto the first adjusting plate. Through such continuous reciprocating cycles, the heat storage ceramic can be moved, and the heat storage ceramic at the edge can be entered into the center, and the heat storage ceramic at the center moves to the edge. In this way, the problem of uneven contact between the heat storage ceramic and the airflow is effectively solved, so that each heat storage ceramic can fully store and release heat to the airflow.

[0020] The gas after S4 treatment passes through the desulfurization equipment for semi-dry desulfurization treatment, and then passes through the bag dust removal equipment for dust removal.

[0021] Compared with the prior art, the present invention has the following technical effects:

[0022] The design of the heat storage chamber and combustion chamber can utilize the heat storage and heat release mode of heat storage ceramics to recover the waste heat of combustion and automatically heat the newly incoming exhaust gas. This not only achieves the treatment of exhaust gas, but also reduces the fuel required in the exhaust gas heating process, achieving energy conservation, emission reduction, carbon reduction and efficiency improvement.

[0023] Since traditional heat storage ceramics are all fixed, and when the air flow passes through the heat storage ceramics, due to the different thickness of the pipes, the air flow preferentially passes through the heat storage ceramics in the middle, while the heat storage ceramics at the edge rarely have air flow passing through, which makes the heat storage ceramics unable to fully recover heat from the air flow, and also unable to fully heat the air flow. The design of the support plate, the first adjustment plate, the second adjustment plate, the first push plate and the second push plate can make the original fixed heat storage ceramics move through the back and forth movement of the first adjustment plate and the second adjustment plate, and the reciprocating pushing of the first push plate and the second push plate, so that the heat storage ceramics in the middle can move to the edge, and the heat storage ceramics at the edge can move to the middle, and can circulate, so that each heat storage ceramic can fully store heat and fully release heat to the air flow after heat storage.

[0024] With reference to the following description and the accompanying drawings, the specific embodiments of the present invention are disclosed in detail, indicating the manner in which the principles of the present invention can be employed. It should be understood that the embodiments of the present invention are not limited in scope thereby.

[0025] Features described and / or illustrated with respect to one embodiment may be used in the same or similar manner in one or more other embodiments, combined with features in other embodiments, or substituted for features in other embodiments.

[0026] It should be emphasized that the term "include / comprising" when used herein refers to the presence of features, integers, steps or components, but does not exclude the presence or addition of one or more other features, integers, steps or components. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without paying any creative labor.

[0028] Figure 1 The process flow chart provided by the present invention.

[0029] Figure 2 This is a schematic diagram of the three-dimensional structure provided by the present invention.

[0030] Figure 3 This is a schematic diagram of the three-dimensional connection structure of the first adjustment box and the first adjustment plate provided by the present invention.

[0031] Figure 4 This is a schematic diagram of the three-dimensional connection structure of the heat storage ceramic, the first adjustment plate and the second adjustment plate provided by the present invention.

[0032] Figure 5 This is a schematic diagram of the three-dimensional connection structure of the support plate, the first adjustment plate and the second adjustment plate provided by the present invention.

[0033] Figure 6 This is a schematic diagram of the three-dimensional connection structure of the first adjustment plate and the reciprocating screw provided by the present invention.

[0034] Figure 7 This is a schematic diagram of the three-dimensional connection structure of the first adjustment plate provided by the present invention.

[0035] Figure 8 This is a schematic diagram of the connection structure between the roller and the second slide provided by the present invention.

[0036] Explanation of the numbers in the figure: 1. first heat storage chamber; 2. combustion chamber; 3. second heat storage chamber; 4. first regulating box; 41. first regulating plate; 411. suction groove; 412. second slide plate; 413. suction hole; 414. connecting groove; 415. roller; 416. chain; 42. first push plate; 43. first hydraulic rod; 5. second regulating box; 51. second regulating plate; 52. second hydraulic rod; 53. second push plate; 6. air inlet pipe; 7. exhaust pipe; 8. suction fan; 81. suction pipe; 82. delivery pipe; 83. suction branch pipe; 9. heat storage ceramic; 91. support plate; 92. limiting groove; 921. reciprocating screw; 922. worm; 923. drive motor; 924. delivery shaft; 93. first slide plate; 95. ventilation groove; 96. limiting plate; 97. limiting hole. DETAILED DESCRIPTION

[0037] In order to enable those skilled in the art to better understand the technical solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of 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 the present invention.

[0038] It should be noted that when an element is referred to as being "disposed on" another element, it may be directly on the other element or there may be another element centered thereon. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be another element centered thereon. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation methods.

[0039] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this invention pertains. The terms used in this specification of the present invention are for the purpose of describing specific embodiments only and are not intended to limit the present invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0040] Example 1, please refer to Figure 1 、 Figure 2 and Figure 3 、 Figure 4 、 Figure 5, a VOCs waste gas treatment device for coke oven, comprising a multi-pollutant collaborative treatment device, a waste heat recovery boiler, a desulfurization device and a bag dust removal device, wherein the waste gas is treated by the multi-pollutant collaborative treatment device, desulfurized by the desulfurization device, and then discharged after dust removal by the bag dust removal device, the waste heat recovery boiler is used to recover and utilize the heat in the gas treated by the multi-pollutant collaborative treatment device, the multi-pollutant collaborative treatment device comprises an air intake pipe 6, an exhaust pipe 7, a first heat storage chamber 1, a second heat storage chamber 3 and a combustion chamber 2, the combustion chamber 2 is connected with the upper ends of the first heat storage chamber 1 and the second heat storage chamber 3, the air intake pipe 6 is provided with an air intake branch pipe which is connected with the air intake ends at the bottom of the first heat storage chamber 1 and the second heat storage chamber 3 respectively, the exhaust pipe 7 is provided with an exhaust branch pipe which is connected with the exhaust ends at the bottom of the first heat storage chamber 1 and the second heat storage chamber 3 respectively, and the air intake branch pipe and the exhaust pipe are both provided with control valves, the first heat storage chamber 1 and the second heat storage chamber 3 are connected Both heat storage chambers 3 are provided with a plurality of fixedly connected support plates 91, and the support plates 91 are provided with a plurality of long ventilation slots 95 for air flow through, and the ventilation slots 95 are provided with evenly distributed rectangular heat storage ceramics 9. One side of the first heat storage chamber 1 and the second heat storage chamber 3 is provided with a first regulating box 4 that is connected, and the first regulating box 4 is provided with a plurality of first regulating plates 41 corresponding to the support plates 91 and movable back and forth, and the first regulating box 4 is provided with a first push plate 42 that can move back and forth and is used to push the heat storage ceramics 9. The other side of the first heat storage chamber 1 and the second heat storage chamber 3 is provided with a second regulating box 5 that is connected, and the second regulating box 5 is provided with a plurality of second regulating plates 51 corresponding to the support plates 91 and movable back and forth, and the second regulating box 5 is provided with a second push plate 53 that can move back and forth and is used to push the heat storage ceramics 9, and the first push plates 42 and the second push plates 53 are staggered. The waste gas includes high oxygen VOCs, coke oven flue gas, and dry quenching flue gas. The carbon monoxide content in the dry quenching flue gas pipe is 4-12% Vol, and the non-methane total hydrocarbon content is 100-350 mg / Nm 3 The non-methane total hydrocarbon content in the gas in the high oxygen VOCs tube is 2000-4000 mg / Nm 3 The carbon monoxide content in the gas in the flue gas pipe is 1000-5000 mg / Nm 3 After mixing the above three waste gases, the CO content is about 7000mg / Nm 3 .

[0041] The design of the heat storage chamber and the combustion chamber 2 can utilize the heat storage and heat release mode of the heat storage ceramic 9 to recover the waste heat of combustion and automatically heat the newly incoming exhaust gas, which not only realizes the treatment of exhaust gas, but also reduces the fuel required in the exhaust gas heating process, achieving energy conservation, emission reduction, carbon reduction and efficiency improvement.

[0042] Since traditional heat storage ceramics 9 are all fixed, when the airflow passes through the heat storage ceramics 9, due to the different thickness of the pipes, the airflow preferentially passes through the heat storage ceramics 9 in the middle, while the heat storage ceramics 9 at the edge rarely pass through the airflow, which makes the heat storage ceramics 9 unable to fully recover the heat of the airflow, and also unable to fully heat the airflow. The design of the support plate 91, the first adjustment plate 41, the second adjustment plate 51, the first push plate 42 and the second push plate 53 can move the original fixed heat storage ceramics 9 through the back and forth movement of the first adjustment plate 41 and the second adjustment plate 51, and the reciprocating pushing of the first push plate 42 and the second push plate 53, so that the middle heat storage ceramics 9 can move to the edge, and the heat storage ceramics 9 at the edge can move to the middle, and can circulate, so that each heat storage ceramic 9 can fully store heat and fully release heat to the airflow after heat storage.

[0043] See also Figure 4 、 Figure 5 and Figure 6 In this embodiment, a limiting groove 92 is provided on both sides of the support plate 91, and a slidably connected limiting plate 96 is provided in the limiting groove 92. The limiting plates 96 are fixedly connected to the corresponding first adjustment plate 41 and the second adjustment plate 51 respectively. A rotatable reciprocating screw 921 is provided in the limiting groove 92, and a through-type limiting hole 97 is provided on the limiting plate 96. The limiting hole 97 is matched with the reciprocating screw 921.

[0044] The addition of the reciprocating screw 921 can realize the periodic reciprocating motion of the first adjustment plate 41 and the second adjustment plate 51 through the rotation of the reciprocating screw 921 .

[0045] See also Figure 5 、 Figure 6 and Figure 7 In this embodiment, a drive motor 923 is provided at the bottom of each of the first and second regulating boxes 4 and 5. A delivery shaft 924 is provided at the output end of the drive motor 923. A turbine is fixedly connected to the end of each of the reciprocating screws 921. A worm 922 is fixedly connected to the delivery shaft 924 and matched with the turbine. The design of the worm and worm 922 enables the drive motor 923 to drive the vertical delivery shaft 924 to rotate, thereby driving the turbine through the worm 922. This allows the turbine to drive the synchronous rotation of the reciprocating screw 921, thus achieving synchronous motion of the reciprocating screw 921.

[0046] See also Figure 4 In this embodiment, a first hydraulic rod 43 is fixedly connected in the first regulating box 4, and the first hydraulic rod 43 is fixedly connected to the first push plate 42. A second hydraulic rod 52 is fixedly connected in the second regulating box 5, and the second hydraulic rod 52 is fixedly connected to the second push plate 53.

[0047] See also Figure 5 、 Figure 6 and Figure 7 In this embodiment, a plurality of suction grooves 411 for sucking impurities from the bottom of the thermal storage ceramic 9 are provided on the first regulating plate 41. A suction fan 8 is provided between the first thermal storage chamber 1 and the second thermal storage chamber 3. A delivery pipe 82 is provided at the output end of the suction fan 8, and the delivery pipe 82 is connected to the combustion chamber 2. A suction pipe 81 is provided at the air inlet end of the suction fan 8, and the suction pipe 81 is connected to the suction grooves 411.

[0048] The design of the suction groove 411, the suction fan 8 and the conveying pipe 82 can utilize the negative pressure generated by the suction fan 8 to automatically suck the bottom of the heat storage ceramic 9 through the suction groove 411. This suction method can automatically clean up the impurities at the bottom of the heat storage ceramic 9, effectively preventing the accumulation of impurities at the bottom of the heat storage ceramic 9 and affecting the airflow efficiency. The design of the conveying pipe 82 can convey the sucked material to the combustion chamber 2 through the conveying pipe 82, and automatically discharge it after full combustion.

[0049] See also Figure 5 、 Figure 6 and Figure 7 In this embodiment, a suction hole 413 is provided at one end of the first adjustment plate 41. A connecting groove 414 is provided on the sidewall of the suction groove 411, communicating with the suction hole 413. Connecting and retractable suction branch pipes 83 are provided at the ends of the suction holes 413. Each suction branch pipe 83 is in communication with a corresponding suction pipe 81. The addition of the suction branch pipes 83 does not affect the reciprocating movement of the first adjustment plate 41, while also ensuring automatic suction of the suction groove 411.

[0050] In this embodiment, the support plates 91 at both ends of the ventilation slot 95 are each provided with a first slide 93 fixedly connected thereto, the first adjustment plate 41 and the second adjustment plate 51 are each provided with a second slide 412 fixedly connected thereto and corresponding to the first slide 93, and the bottom of the heat storage ceramic is provided with a sliding groove slidably connected to the first slide and the second slide 412.

[0051] The design of the first slide 93, the second slide 412 and the slide groove can ensure the stability of the heat storage ceramic 9 during the movement, so that the heat storage ceramic 9 can achieve precise movement without deviation, and effectively prevent the heat storage ceramic 9 from deviating during the movement, causing the heat storage ceramic 9 to fail to operate normally.

[0052] See also Figure 8In this embodiment, each of the second slide plates 412 is provided with a rotatable roller 415 for driving the thermal storage ceramic 9. The roller design enables the thermal storage ceramic 9 to be automatically separated from the adjacent thermal storage ceramic 9 after being extruded and transported onto the first adjustment plate 41 or the second adjustment plate 51. This prevents interference between the thermal storage ceramics 9 during movement of the first adjustment plate 41 and the second adjustment plate 51, thereby ensuring the stability of the thermal storage ceramic 9 during operation.

[0053] See also Figure 8 In this embodiment, adjacent rollers 415 are connected by a chain 416, and upper and lower adjacent rollers 415 are connected by a chain 416. A first motor is provided on the first adjustment plate 41 and the second adjustment plate 51, and the output end of the first motor is connected to one of the rollers 415.

[0054] When using this application:

[0055] When it is necessary to control the operation of the heat storage ceramic 9, the first adjustment plate 41 equipped with the heat storage ceramic 9 is first moved to the first push plate 42 by rotating the reciprocating screw 921, and then the first hydraulic rod 43 is started to drive the first push plate 42 to push the heat storage ceramic 9 toward the heat storage ceramic 9 on the support plate 91. Through the extrusion of the adjacent heat storage ceramics 9, the heat storage ceramic 9 on the other side can be squeezed and transported to the second adjustment plate 51, and the roller 415 on the second adjustment plate 51 is controlled to rotate to make the heat storage ceramic 9 on the second adjustment plate 51 away from the heat storage ceramic 9 on the support plate 91;

[0056] Then the first adjustment plate 41 is controlled to restore to its initial position, and the second adjustment plate 51 is controlled to move to the second push plate 53. Then the second push plate 53 is controlled to move to push the heat storage ceramic 9 on the second adjustment plate 51 onto the support plate 91. By utilizing the extrusion between adjacent heat storage ceramics 9, the heat storage ceramic 9 on the other side can be squeezed onto the first adjustment plate 41. Through such a cyclic reciprocating movement, the heat storage ceramic 9 is put into operation, so that the heat storage ceramic 9 in the middle can move to the edge, and the heat storage ceramic 9 at the edge can move to the middle, so that each heat storage ceramic 9 can fully store and release heat, and utilize the waste heat recovery rate;

[0057] When the heat storage ceramic 9 moves to the first adjustment plate 41 and reaches the set position, the negative pressure generated by controlling the suction fan 8 can automatically suck out the impurities accumulated at the bottom of the heat storage ceramic 9, and transport them to the gas chamber through the delivery pipe 82 for combustion and then automatically discharged, thereby realizing automatic cleaning of the heat storage ceramic 9 and effectively preventing blockage of the heat storage ceramic 9.

[0058] A method for treating VOCs waste gas from a coke oven, using the VOCs waste gas treatment device for a coke oven, comprises the following steps:

[0059] S1 passes the exhaust gas into the first regenerator 1 through the intake pipe 6 and the intake branch pipe, and then enters the combustion chamber 2 through the first regenerator 1 for combustion. After combustion, the hot air flows through the heat storage ceramic 9 of the second regenerator 3 and enters the exhaust pipe 7 through the exhaust branch pipe for discharge;

[0060] During the intake process of S2, the air flow enters the bottom of the second heat storage chamber 3 by switching the control valve, and then passes through the heat storage ceramic 9 and enters the combustion chamber 2 for combustion. Since the heat storage ceramic 9 stores a certain amount of heat when the hot air flow passes through the heat storage ceramic 9 in step S1, the heat storage ceramic 9 can heat the air flow after the air flow passes through the heat storage ceramic 9, so that the waste heat in the air flow after combustion can be recovered to reduce the exhaust temperature. At the same time, it can heat the air flow of the intake, saving the fuel consumption in the process of heating the exhaust gas. The air flow after combustion passes through the first heat storage chamber 1 and the heat storage ceramic 9 in the first heat storage chamber 1. The heat storage ceramic 9 can recover the heat in the air flow after combustion and finally discharge it through the exhaust pipe 7. By switching back and forth in this way, the first heat storage chamber 1 and the second heat storage chamber 3 perform the process of heat storage and heat release in turn, and work continuously and alternately.

[0061] S3 During the process of heat storage ceramic 9 storing or releasing heat, by controlling the pushing of the first push plate 42, the heat storage ceramic 9 on the first adjusting plate 41 is pushed toward one side of the support plate 91, so that the heat storage ceramic 9 on the other side of the support plate 91 enters the corresponding second adjusting plate 51, and then the second adjusting plate 51 is controlled to move the second adjusting plate 51 to the second push plate 53, and the second push plate 53 is controlled to push the heat storage ceramic 9 on the second adjusting plate 51 onto the support plate 91, and the heat storage ceramic 9 on the other side is squeezed and pushed onto the first adjusting plate 41. Through such continuous reciprocating circulation, the heat storage ceramic 9 can be moved, and the heat storage ceramic 9 at the edge can enter the center, and the heat storage ceramic 9 at the center moves to the edge. In this way, the problem of uneven contact between the heat storage ceramic 9 and the airflow is effectively solved, so that each heat storage ceramic 9 can fully store heat and release heat to the airflow;

[0062] The gas after S4 treatment passes through the desulfurization equipment for semi-dry desulfurization treatment, and then passes through the bag dust removal equipment for dust removal.

[0063] All articles and references disclosed herein, including patent applications and publications, are incorporated herein by reference for all purposes. The term "consisting essentially of..." when describing a combination should include the identified elements, ingredients, components, or steps and other elements, ingredients, components, or steps that do not materially affect the basic novel characteristics of the combination. The use of the terms "comprising" or "including" to describe a combination of elements, ingredients, components, or steps herein also contemplates embodiments consisting essentially of these elements, ingredients, components, or steps. By using the term "may," it is intended to indicate that any attribute described as "may" be optional.

[0064] Multiple elements, ingredients, parts or steps can be provided by a single integrated element, ingredient, part or step. Alternatively, a single integrated element, ingredient, part or step can be divided into separate multiple elements, ingredients, parts or steps. The disclosure of "a" or "an" to describe an element, ingredient, part or step is not intended to exclude other elements, ingredients, parts or steps.

[0065] It should be understood that the above description is for illustration and not for limitation. Many embodiments and many applications beyond the examples provided will be apparent to those skilled in the art upon reading the above description. Therefore, the scope of this application should not be determined with reference to the above description, but rather with reference to the appended claims and the full scope of equivalents to which such claims are entitled. For the purpose of comprehensiveness, all articles and references, including disclosures of patent applications and publications, are incorporated herein by reference. The omission of any aspect of the subject matter disclosed herein from the foregoing claims is not intended to be a disclaimer of such subject matter, nor should it be considered that the inventors did not consider such subject matter to be part of the disclosed inventive subject matter.

Claims

1. A VOCs waste gas treatment device for a coke oven, characterized by: The evaporation fan is equipped with a heat recovery boiler, a desulfurization device, and a bag dust removal device. The exhaust gas is treated by the multi-pollutant co-treatment device, desulfurized by the desulfurization device, and then discharged after dust removal by the bag dust removal device. The waste heat recovery boiler is used to recover the heat in the gas treated by the multi-pollutant co-treatment device. The multi-pollutant co-treatment device includes an air intake pipe, an exhaust pipe, a first heat storage chamber, a second heat storage chamber and a combustion chamber. The combustion chamber is connected to the upper ends of the first heat storage chamber and the second heat storage chamber. The air intake pipe is provided with an air intake branch pipe connected to the air intake ends at the bottom of the first heat storage chamber and the second heat storage chamber respectively. The exhaust pipe is provided with an exhaust branch pipe connected to the exhaust ends at the bottom of the first heat storage chamber and the second heat storage chamber respectively. Control valves are provided in both the air intake branch pipe and the exhaust branch pipe. The first heat storage chamber The chamber and the second heat storage chamber are both provided with a plurality of fixedly connected support plates, the support plates are provided with a plurality of long ventilation slots for air flow, and the ventilation slots are provided with evenly distributed and rectangular heat storage ceramics. The first heat storage chamber and the second heat storage chamber are both provided with a first communicating regulating box on one side, a plurality of first regulating plates corresponding to the support plates and movable back and forth are provided in the first regulating box, and a first push plate movable back and forth and used for pushing the heat storage ceramics is provided in the first regulating box, and a second communicating regulating box is provided on the other side of the first heat storage chamber and the second heat storage chamber, a plurality of second regulating plates corresponding to the support plates and movable back and forth are provided in the second regulating box, and a second push plate movable back and forth and used for pushing the heat storage ceramics is provided in the second regulating box, and the first push plates and the second push plates are staggered.

2. The VOCs waste gas treatment device for coke oven according to claim 1, characterized in that: There are limit grooves on both sides of the support plate, and a sliding limit plate is provided in the limit groove. The limit plates are fixedly connected to the corresponding first adjustment plate and the second adjustment plate respectively. A rotatable reciprocating screw is provided in the limit groove, and a through-type limit hole is provided on the limit plate, and the limit hole is matched with the reciprocating screw.

3. The coke oven VOCs waste gas treatment device according to claim 2, characterized in that: The bottom of the first regulating box and the second regulating box are both provided with a driving motor, the output end of the driving motor is provided with a conveying shaft, the end of the reciprocating screw is provided with a fixedly connected turbine, and the conveying shaft is provided with a worm that is fixedly connected and matched with the turbine.

4. The coke oven VOCs waste gas treatment device according to claim 1, characterized in that: A first hydraulic rod is fixedly connected in the first adjustment box, and the first hydraulic rod is fixedly connected to the first push plate. A second hydraulic rod is fixedly connected in the second adjustment box, and the second hydraulic rod is fixedly connected to the second push plate.

5. The VOCs waste gas treatment device for coke oven according to claim 1, characterized in that: The first regulating plate is provided with a plurality of suction grooves for sucking impurities from the bottom of the heat storage ceramic. A suction fan is provided between the first heat storage chamber and the second heat storage chamber. A delivery pipe is provided at the output end of the suction fan, and the delivery pipe is connected to the combustion chamber. A suction pipe is provided at the air inlet end of the suction fan, and the suction pipe is connected to the suction grooves.

6. The coke oven VOCs waste gas treatment device according to claim 5, characterized in that: A suction hole is provided at one end of the first adjustment plate, a connecting groove connected to the suction hole is provided on the side wall of the suction groove, and a connecting and retractable suction branch pipe is provided at the end of the suction hole, and the suction branch pipes are respectively connected to the corresponding suction pipes.

7. The coke oven VOCs waste gas treatment device according to claim 1, characterized in that: The support plates at both ends of the ventilation slot are each provided with a first slide fixedly connected thereto, the first adjustment plate and the second adjustment plate are each provided with a second slide fixedly connected thereto and corresponding to the first slide, and the bottom of the heat storage ceramic is provided with a sliding groove slidably connected to the first slide and the second slide.

8. The coke oven VOCs waste gas treatment device according to claim 7, characterized in that: The second slide plates are each provided with a rotatable roller for driving the heat storage ceramic to move.

9. The coke oven VOCs waste gas treatment device according to claim 8, characterized in that: The adjacent rollers are connected by a chain, and the upper and lower adjacent rollers are connected by a chain. The first adjustment plate and the second adjustment plate are both provided with a first motor, and the output end of the first motor is connected to one of the rollers.

10. A method for treating VOCs waste gas from a coke oven, using the VOCs waste gas treatment device for a coke oven according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1 passes the exhaust gas into the first regenerator through the intake pipe and the intake branch pipe, and then enters the combustion chamber through the first regenerator for combustion. After combustion, the hot air flows through the heat storage ceramics of the second regenerator and enters the exhaust pipe through the exhaust branch pipe for discharge; During the intake process of S2, the airflow enters the bottom of the second heat storage chamber by switching the control valve, and then passes through the heat storage ceramic and enters the combustion chamber for combustion. Since the heat storage ceramic stores a certain amount of heat when the hot air flows through the heat storage ceramic in step S1, the heat storage ceramic can heat the airflow after the airflow passes through the heat storage ceramic, so that the waste heat in the airflow after combustion can be recovered to reduce the exhaust temperature. At the same time, the airflow of the intake can be heated to save the fuel consumption in the process of heating the exhaust gas. The airflow after combustion passes through the first heat storage chamber and the heat storage ceramic in the first heat storage chamber. The heat storage ceramic can recover the heat in the airflow after combustion and finally discharge it through the exhaust pipe. By switching back and forth in this way, the first heat storage chamber and the second heat storage chamber perform the process of heat storage and heat release in turn, and work alternately continuously. S3 is a process in which the heat storage ceramic stores or releases heat. By controlling the pushing of the first push plate, the heat storage ceramic on the first adjusting plate is pushed toward one side of the support plate, so that the heat storage ceramic on the other side of the support plate enters the corresponding second adjusting plate. Then, the second adjusting plate is controlled to move the second adjusting plate to the second push plate, and the second push plate is controlled to push the heat storage ceramic on the second adjusting plate onto the support plate, and the heat storage ceramic on the other side is squeezed and pushed onto the first adjusting plate. Through such continuous reciprocating cycles, the heat storage ceramic can be moved, and the heat storage ceramic at the edge can be entered into the center, and the heat storage ceramic at the center moves to the edge. In this way, the problem of uneven contact between the heat storage ceramic and the airflow is effectively solved, so that each heat storage ceramic can fully store and release heat to the airflow. The gas after S4 treatment passes through the desulfurization equipment for semi-dry desulfurization treatment, and then passes through the bag dust removal equipment for dust removal.

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