Denitration equipment and waste gas treatment system

Abstract

The utility model relates to denitration equipment and a waste gas treatment system.The denitration equipment comprises a denitration tower, a rake type soot blower and a plurality of catalyst layers located in the denitration tower and arranged at intervals in the height direction, and the rake type soot blower partially extends into the denitration tower and is located above the catalyst layers; and at least one pressure sensor is mounted in different areas on the lower surface of the catalyst layer. According to pressure data monitored by the pressure sensors in all the areas of the catalyst layer, the ash deposition conditions and the blocking conditions of different areas of the upper surface of the catalyst layer can be determined, and according to the different ash deposition conditions and the different blocking conditions, the ash blowing time, the moving speed and the ash blowing pressure of the rake type ash blowing device in the different areas are controlled; unnecessary long-time soot blowing and atmospheric pressure soot blowing in some areas are avoided, so that the whole soot blowing time is shortened, and the requirement for compressed air is reduced.

Description

Technical Field

[0001] This application relates to the technical field of waste gas treatment, and particularly relates to a denitration device and a waste gas treatment system. Background Art

[0002] During the glass production process, a large amount of soot is generated, and the soot needs to enter the denitration tower for denitration treatment. After working for a long time, a large amount of soot will be deposited on the surface of the catalyst layer in the denitration tower, blocking the pores of the catalyst layer and affecting the operation of the catalyst layer. Therefore, it is necessary to regularly use a rake-type soot blower to clean the inside of the cement kiln to ensure the normal operation and production of the denitration tower. However, each time the rake-type soot blower works, it requires compressed air, and the soot blowing time is relatively long, with high requirements for the pressure and flow rate of the compressed air, which will affect the normal use of other equipment using compressed air. If a new air compressor or booster equipment is added for this purpose, a large investment is required. Summary of the Utility Model

[0003] The main purpose of the present utility model is to provide a denitration device and a waste gas treatment system, aiming to solve the technical problem that the existing soot blowing work time is long and the demand for compressed air is large.

[0004] To achieve the above object, in a first aspect, the present utility model provides a denitration device, which includes a denitration tower, a rake-type soot blowing device, and a plurality of catalyst layers arranged at intervals along the height direction of the denitration tower and located inside the denitration tower. The rake-type soot blowing device partially extends into the denitration tower and is located above the catalyst layer, and further includes a plurality of pressure sensors located in different regions on the lower surface of the catalyst layer.

[0005] Optionally, it further includes at least one ultrasonic vibration device corresponding to each catalyst layer, and the ultrasonic vibration device is arranged on the side wall of the denitration tower and connected to the corresponding catalyst layer.

[0006] Optionally, the catalyst layer includes a load-bearing frame and a honeycomb-type denitration catalyst module arranged inside the load-bearing frame.

[0007] Optionally, it further includes a differential pressure transmitter, and the differential pressure transmitter is used to monitor the differential pressure between the inlet and outlet of the denitration tower.

[0008] Optionally, it further includes at least one video monitoring device corresponding to each catalyst layer, and the video monitoring device is used to monitor the image of the upper surface of the corresponding catalyst layer.

[0009] Optionally, the rake type soot blower device includes a driving component, a rake type soot blower, a support track, and a dust-proof cover; the rake type soot blower is slidably arranged on the support track; the driving component is connected to one end of the rake type soot blower to drive the rake type soot blower to move along the length direction of the support track; the part of the support track located inside the denitration tower is accommodated inside the dust-proof cover; openings are provided at both ends of the dust-proof cover.

[0010] Optionally, a dust blocking member is arranged on the circumference of the opening at the end of the dust-proof cover far from the driving component.

[0011] Optionally, a plurality of ash discharge holes arranged at intervals are formed on the part of the support track located inside the dust-proof cover.

[0012] Optionally, a plurality of second sliders are arranged on the side of the rake type soot blower facing the support track.

[0013] Optionally, in a second aspect, the present invention further provides an exhaust gas treatment system, and the exhaust gas treatment system includes the aforementioned denitration equipment.

[0014] The denitration equipment provided by the present invention includes: a denitration tower, a rake type soot blower device, and a plurality of catalyst layers located inside the denitration tower and arranged at intervals along the height direction of the denitration tower. The rake type soot blower device partially extends into the denitration tower and is located above the catalyst layers, and further includes a plurality of the pressure sensors located in different regions on the lower surface of the catalyst layers. Through the pressure data monitored by the pressure sensors in each region of the catalyst layer, the ash accumulation situation and blockage situation in different regions on the upper surface of the catalyst layer can be determined. According to the different ash accumulation situations and blockage situations, the soot blowing time, moving speed, and soot blowing pressure of the rake type soot blower device in different regions are controlled, avoiding unnecessary long-time soot blowing and atmospheric pressure soot blowing in some regions, thereby reducing the overall soot blowing duration and compressed air demand. Description of the Drawings

[0015] The drawings here are incorporated into the specification and form a part of this specification, showing embodiments consistent with the present invention, and are used together with the specification to explain the principles of the present invention.

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, for those of ordinary skill in the art, other drawings can also be obtained based on these drawings without creative efforts.

[0017] One or more embodiments are exemplarily illustrated by the pictures in the corresponding drawings. These exemplary illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are represented as similar elements, unless otherwise stated. The drawings in the figures do not constitute a scale limitation.

[0018] Figure 1 It is a schematic structural diagram of a denitration device provided by an embodiment of the present application;

[0019] Figure 2 It is a schematic structural diagram of a rake-type soot blower provided by an embodiment of the present application;

[0020] Figure 3 It is a schematic structural diagram of a dust cover provided by an embodiment of the present application;

[0021] Figure 4 It is a schematic structural diagram of a support rail provided by an embodiment of the present application.

[0022] Description of reference numerals:

[0023] 1. Rake-type soot blower; 11. Driving component; 111. Motor; 112. Frame; 113. First slider; 12. Rake-type soot blower; 13. Support rail; 131. Ash discharge hole; 14. Dust cover; 141. Opening; 142. Ash blocking member; 15. Second slider; 2. Denitration tower; 3. Catalyst layer; 4. Pressure sensor; 5. Ultrasonic vibration device; 6. Video monitoring device; 7. Differential pressure transmitter. Detailed implementation manners

[0024] To make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative efforts shall fall within the scope of protection of the present application.

[0025] The following disclosure provides many different embodiments or examples for implementing different structures of the present invention. To simplify the disclosure of the present invention, the components and settings of specific examples are described below. Of course, they are only examples and are not intended to limit the present invention. In addition, the present invention may repeat reference numerals and / or letters in different examples. This repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed.

[0026] For ease of description, spatial relative relationship terms may be used in the text to describe the relative positional relationship or movement of one element or feature shown in the figure with respect to another element or feature. These relative relationship terms are, for example, "inside", "outside", "inner side", "outer side", "below", "beneath", "above", "upper", "front", "rear", etc. Such spatial relative relationship terms are intended to include different orientations of the device during use or operation other than the orientations depicted in the figure. For example, if the device in the figure undergoes a position flip, attitude change, or change in motion state, then these directional indications will change accordingly. For example, an element described as "below" or "beneath" other elements or features will subsequently be oriented as "above" or "upper" other elements or features. Therefore, the exemplary term "below" can include both upper and lower orientations. The device can be oriented otherwise (rotated 90 degrees or in other directions) and the spatial relative relationship descriptors used in the text are interpreted accordingly.

[0027] Referring Figure 1 As shown, the present utility model provides a denitration device, which includes: a denitration tower 2, a rake-type sootblowing device 1, and a plurality of catalyst layers 3 located inside the denitration tower 2 and arranged at intervals along the height direction of the denitration tower 2. The soot to be denitrated enters from the upper end inlet of the denitration tower 2, undergoes a denitration reaction through multiple catalyst layers 3, and finally exits from the lower end outlet of the denitration tower 2 to a treatment process. The catalyst layer 3 includes a load-bearing frame and a honeycomb denitration catalyst module disposed inside the load-bearing frame. During the denitration process, some soot will deposit on the surface and pores of the catalyst layer 3. At least one pressure sensor 4 is installed in different regions on the lower surface of the catalyst layer 3, and this pressure sensor 4 is used to monitor the pressure in this region. As the degree of ash accumulation becomes heavier, the pressure monitored in this region should become larger. The rake-type sootblowing device 1 partially extends into the denitration tower 2 and is located above the catalyst layer 3. The rake-type sootblowing device 1 can reciprocate above the catalyst layer 3 and introduce external compressed air to blow the catalyst layer 3.

[0028] When sootblowing work needs to be carried out, based on the pressure data monitored by the pressure sensors 4 in each region of the catalyst layer 3, the ash accumulation and blockage conditions in different regions on the upper surface of the catalyst layer 3 can be determined. According to the different ash accumulation and blockage conditions, the sootblowing time, moving speed, and sootblowing pressure of the rake-type sootblowing device 1 in different regions are controlled, avoiding unnecessary long-term sootblowing and atmospheric pressure sootblowing in some regions, thereby reducing the overall sootblowing duration and compressed air demand.

[0029] Furthermore, the denitration equipment further includes at least one ultrasonic vibration device 5 corresponding to the catalyst layer 3 one by one. The ultrasonic vibration device 5 is on the side wall of the denitration tower 2 and is connected to the corresponding catalyst layer 3. Before or during the soot blowing operation, the ultrasonic vibration device 5 can be turned on. The ultrasonic vibration device 5 generates ultrasonic vibrations, which can vibrate the soot deposited on the surface and pores of the catalyst layer 3 from a compact state to a loose state, facilitating the subsequent or ongoing soot blowing operation and making it easier to blow the deposited ash into the next layer.

[0030] Furthermore, the denitration equipment further includes a differential pressure transmitter 7 for monitoring the differential pressure at the inlet and outlet of the denitration tower 2. When the differential pressure at the inlet and outlet is higher than a certain value, it reminds to start the soot blowing operation or directly automatically starts the soot blowing operation, eliminating the need for regular soot blowing and avoiding waste of compressed air.

[0031] Furthermore, the denitration equipment further includes at least one video monitoring device 6 corresponding to the catalyst layer 3 one by one. The video monitoring device 6 is used to monitor the upper surface image of the corresponding catalyst layer 3. The monitored image can reflect the height of the ash accumulation layer in different areas. During the soot blowing process, by combining the data of the pressure sensor 4 and the image of the video monitoring device 6, the ash accumulation situation in each area can be judged more accurately. According to the ash accumulation situation in each area, the soot blowing duration, compressed air pressure and compressed air volume in each area can be adjusted more precisely, avoiding unnecessary long-term soot blowing operations, excessive compressed air pressure and compressed air volume. For example, if the pressure value monitored by the pressure sensor 4 in a certain area is small and the image of the video monitoring device 6 shows a high ash accumulation layer in this area, it indicates that although the ash accumulation layer in this area is high, the accumulation is relatively loose. When the rake-type soot blowing device 1 works in this area, the compressed air pressure can be reduced.

[0032] In another embodiment, referring to Figure 2 and Figure 3As shown, the rake sootblower 1 comprises: a driving component 11, a rake sootblower 12, a support track 13 and a dust cover 14; the rake sootblower 12 is slidably arranged on the support track 13, and the structure of the rake sootblower 12 is a prior art, which is not described in detail here. A part of the rake sootblower 12 is located inside the denitration tower 2, and a part is located outside the denitration tower 2; a part of the support track 13 is located inside the denitration tower 2, and a part is located outside the denitration tower 2; the driving component 11 is connected to one end of the rake sootblower 12, and drives the rake sootblower 12 to move along the length direction of the support track 13, and has The driving component 11 includes a motor 111, a first slider 113 and a frame 112. The first slider 113 is connected to the motor 111 and one end of the rake soot blower 12 respectively. The motor 111 is slidably arranged on the frame 112 and can reciprocate along the length direction of the frame 112. When soot blowing, the motor 111 will reciprocate along the length direction of the frame 112 on the frame 112, and at the same time drive the rake soot blower 12 to reciprocate along the length direction of the support track 13, and blow away the dust deposited on the surface and in the hole of the catalyst layer 3 in the denitration tower 2 during the reciprocating movement. The part of the support track 13 located in the denitration tower 2 is accommodated in the dust cover 14; the dust cover 14 is provided with openings 141 at both ends, wherein a dust blocking member 142 is provided on the circumference of the opening 141 away from one end of the driving component 11, wherein the dust blocking member 142 can be a scraper or a brush. The support rail 13 extends from an opening 141 close to the driving component 11 into the dust cover 14 , and the rake soot blower 12 penetrates through two openings 141 of the dust cover 14 and extends above the catalyst layer in the denitration tower 2 .

[0033] When soot blowing is performed, part of the raised dust will fall directly on the dust cover 14 and will not fall on the support track 13, and part of the dust will fall on the rake soot blower 12 extending out of the dust cover 14. When the rake soot blower 12 moves toward the driving component 11, the dust falling on the rake soot blower 12 extending out of the dust cover 14 will be blocked outside the dust cover 14 by the ash blocking member 142 on the dust cover 14 and will not be brought to the support track 13. Therefore, the soot can be prevented from being deposited on the support track 13 during the soot blowing process.

[0034] Furthermore, a plurality of second sliders 15 are provided on the side of the rake sootblower 12 facing the support rail 13. The second sliders 15 can reduce the friction between the rake sootblower 12 and the support rail 13, and the reciprocating motion of the rake sootblower 12 on the support rail 13 is smoother.

[0035] Further, refer to Figure 2 and Figure 4As shown, a plurality of spaced ash discharge holes 131 are formed in the portion of the support rail 13 located inside the dust cover 14. If a small amount of soot enters the support rail 13, when the rake soot blower 12 reciprocates, the second slider 15 will push the small amount of soot deposited on the support rail 13 to the ash discharge holes 131 on the support rail 13 for discharge. Through the ash discharge holes 131, the deposition of soot on the support rail 13 can be further reduced.

[0036] The present application also proposes an exhaust gas treatment system, and the exhaust gas treatment system includes a denitration device as in the above embodiment.

[0037] It should be understood that the terms used herein are for the purpose of describing specific example embodiments only and are not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms "a", "an", and "the" as used herein may also include the plural forms. The terms "comprising", "including", "containing", and "having" are inclusive and thus specify the presence of the stated features, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring them to be performed in the particular order described or illustrated, unless the order of performance is explicitly stated. It should also be understood that additional or alternative steps may be used.

[0038] Although the terms first, second, third, etc. may be used herein to describe multiple elements, components, regions, layers, and / or sections, these elements, components, regions, layers, and / or sections should not be limited by these terms. These terms may be used only to distinguish one element, component, region, layer, or section from another region, layer, or section. Unless the context clearly indicates otherwise, terms such as "first", "second", and other numerical terms do not imply an order or sequence when used herein. Thus, the first element, component, region, layer, or section discussed below may be referred to as the second element, component, region, layer, or section without departing from the teachings of the example embodiments.

[0039] The above are only specific embodiments of the present invention, enabling those skilled in the art to understand or implement the present invention. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to these embodiments shown herein, but rather will be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A denitration device, comprising a denitration tower, a rake sootblower, and a plurality of catalyst layers located in the denitration tower and arranged at intervals along the height direction of the denitration tower, wherein the rake sootblower partially extends into the denitration tower and is located above the catalyst layer, characterized in that: Also included are a plurality of pressure sensors located at different areas on the lower surface of the catalyst layer.

2. The denitration equipment according to claim 1, characterized in that: It also includes at least one ultrasonic vibration device corresponding to the catalyst layer one by one, and the ultrasonic vibration is arranged on the side wall of the denitration tower and connected to the corresponding catalyst layer.

3. The denitration equipment according to claim 1, characterized in that: The catalyst layer includes a load-bearing frame and a honeycomb denitration catalyst module arranged in the load-bearing frame.

4. The denitration equipment according to claim 1, characterized in that: It also includes a differential pressure transmitter, which is used to monitor the inlet and outlet pressure difference of the denitrification tower.

5. The denitration equipment according to claim 1, characterized in that: It also includes at least one video monitoring device corresponding to the catalyst layer one by one, and the video monitoring device is used to monitor the upper surface image of the corresponding catalyst layer.

6. The denitration equipment according to any one of claims 1 to 5, characterized in that: The rake sootblower device includes a driving component, a rake sootblower, a support rail and a dust cover; the rake sootblower is slidably arranged on the support rail; the driving component is connected to one end of the rake sootblower to drive the rake sootblower to move along the length direction of the support rail; the part of the support rail located in the denitrification tower is accommodated in the dust cover; openings are arranged at both ends of the dust cover.

7. The denitration equipment according to claim 6, characterized in that: A dust blocking member is arranged on the circumference of the opening of the dust cover away from one end of the driving component.

8. The denitration equipment according to claim 6, characterized in that: A plurality of ash discharge holes arranged at intervals are provided on the portion of the support track located inside the dust cover.

9. The denitration equipment according to claim 8, characterized in that: A plurality of second sliding blocks are arranged on one side of the rake sootblower facing the support rail.

10. An exhaust gas treatment system, characterized in that: Comprising the denitration equipment as described in any one of claims 1 to 9.

Images