Boiler utilizing waste heat of hazardous waste flue gas
By adopting a four-stage heat conduction pipe arrangement structure and dust drop chamber in hazardous waste flue gas waste heat boiler, and designing ash cleaning chamber and movable ash cleaning door, the problem of sintered dust adhesion on the surface of the heat conduction pipe is solved, the production capacity and safety of the boiler are improved, and the losses are reduced.
Patent Information
- Application Number
- CN202421712884.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Priority Date
- 2023-07-27
- Filing Date
- 2024-07-19
- Publication Date
- 2025-06-27
- Estimated Expiration
- 2034-07-19
AI Technical Summary
In the comprehensive utilization industry of hazardous waste, the high temperature of the waste gas and the high dust concentration cause sintered dust to adhere to the surface of the heat conduction pipe. The existing vibration and blowing devices or soot blowing devices cannot be effectively cleaned, resulting in a reduction in thermal conductivity, affecting the exhaust gas emissions, and may cause emergency stop of the device and cause unnecessary losses.
A boiler that utilizes the waste heat of hazardous waste flue gas is designed, adopts a four-stage heat conduction pipe arrangement structure, and a dust drop chamber is set up in the first-stage heat conduction pipe area to increase the settlement effect. At the same time, a cleaning room and movable cleaning door are set up to enhance the multi-angle cleaning capacity of the heat conduction pipes and reduce the accumulation of sintered ash.
It effectively avoids the increase in the amount of dust accumulation in the rear of the boiler, improves the continuous production capacity of the boiler, reduces unnecessary energy losses and emergency parking, and reduces the weight and transportation costs of the equipment themselves.
Smart Images
Figure CN223036366U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of boilers, and particularly relates to a boiler for utilizing the waste heat of hazardous waste flue gas. Background Art
[0002] Waste heat boilers are widely used in industries such as the carbon black production industry, the fiberglass production industry, the metallurgical steel industry, the petroleum industry, the acid and alkali manufacturing industry, and the cement industry, etc., to recover the waste heat in the waste gas generated during the production process. Currently, waste heat boilers generally adopt a closed box structure, and refractory bricks are usually built inside as a heat insulation layer. The flue gas dust in general industries is extremely easy to adhere to the surface of the heat conduction tubes. Usually, a vibration device or a soot blowing device is set to remove the dust adhering to the surface of the heat conduction tubes. In the hazardous waste comprehensive utilization industry, due to the high temperature and large dust concentration of the waste gas, it is extremely easy to form sintered dust adhering to the surface of the heat conduction tubes. At this time, if a vibration device or a soot blowing device is still used to remove the sintered dust adhering to the surface of the heat conduction tubes, the cleaning purpose cannot be achieved, and the dust will be blocked between the heat conduction tubes in the flow direction, reducing the heat conduction performance, affecting the waste gas emission, and seriously causing the emergency shutdown of the device, resulting in unnecessary losses. Content of the Utility Model
[0003] In view of this, the main purpose of the utility model is to provide a boiler for utilizing the waste heat of hazardous waste flue gas.
[0004] To achieve the above purpose, the technical solution of the utility model is realized as follows:
[0005] The embodiment of the utility model provides a boiler for utilizing the waste heat of hazardous waste flue gas, which includes a support component, a boiler body component, a drum component, a heat conduction component, and a dust collection component. The support component is arranged at the bottom of the boiler body component for supporting the boiler body component. The drum component is arranged on the boiler body component. The heat conduction component is arranged inside the boiler body component. The dust collection component is arranged at the bottom of the boiler body component. The front and rear ends of the boiler body component are respectively provided with a flue gas inlet and a flue gas outlet.
[0006] In the above solution, the boiler body component includes a boiler body, a heat preservation cotton layer, a heat-resistant concrete layer, and a membrane water wall. The heat preservation cotton layer and the heat-resistant concrete layer are respectively arranged on the inner and outer sides of the boiler body. The membrane water wall is arranged on the inner side of the heat preservation cotton layer. The front and rear ends of the boiler body are respectively connected with the flue gas inlet and the flue gas outlet.
[0007] In the above solution, the support component includes a support, and the support is arranged at the bottom of the boiler body for supporting the boiler body.
[0008] In the above solution, the drum component includes an upper drum and a header. The upper drum is arranged at the top of the boiler body. There are two headers, which are respectively arranged on both sides of the bottom of the boiler body.
[0009] In the above solution, the heat conduction component includes heat conduction tubes, and several heat conduction tubes are arranged in the boiler body respectively. The several heat conduction tubes are arranged in four levels, and ash cleaning chambers are respectively arranged between each level of heat conduction tubes.
[0010] In the above solution, a dust settling chamber is arranged between the first-level heat conduction tube and the flue gas inlet, which is used to reduce the dust in the hazardous waste flue gas.
[0011] In the above solution, ash bins for collecting dust are respectively arranged at the lower parts of each level of heat conduction tubes, and an automatic ash discharge valve is arranged at the bottom of the ash bin.
[0012] In the above solution, the dust collection component includes ash receiving hoppers, and an ash receiving hopper is arranged between each automatic ash discharge valve and the ground.
[0013] In the above solution, movable ash cleaning doors are respectively arranged between each ash cleaning chamber and the heat conduction tubes, and a heat insulation layer is arranged inside the movable ash cleaning doors, which is used to clean the dust deposited in the ash cleaning chambers.
[0014] Compared with the prior art, the beneficial effects of the present utility model are as follows:
[0015] The waste heat boiler described in the present utility model adopts a structural form of arranging heat conduction tubes in four levels, and a dust settling chamber is arranged in the area of the first-level heat conduction tubes. There are fewer heat conduction tubes in this area, the hot air flow velocity slows down, the sedimentation effect is increased, and the problem of increased ash accumulation at the rear of the boiler is avoided. The design of the ash cleaning chamber and the movable ash cleaning door increases the cleaning ability of the heat conduction tubes from multiple angles, reduces the accumulation of sintered ash, improves the continuous production ability of the waste heat boiler, reduces unnecessary energy losses and emergency stop situations. The heat insulation and sealing of the waste heat boiler adopt a structure of adding a heat insulation layer outside the membrane wall, and the heat insulation layer adopts a structure of adding heat insulation rock wool and heat-resistant concrete, which ensures the airtightness and heat insulation effect of the boiler while reducing the self-weight of the equipment, reducing the transportation cost and the basic investment for equipment support. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] The drawings described herein are used to disclose a further understanding of the present utility model, and constitute a part of the present utility model. The schematic embodiments of the present utility model and their descriptions are used to explain the present utility model, and do not constitute an improper limitation to the present utility model. In the drawings:
[0017] Figure 1 is a schematic horizontal structure diagram of a boiler using the waste heat of hazardous waste flue gas according to an embodiment of the present utility model;
[0018] Figure 2 is Figure 1 the sectional view taken along line A-A in
[0019] Figure 3 is Figure 1 the sectional view taken along line B-B in Detailed implementation mode
[0020] In order to make the objectives, technical solutions and advantages of the present utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.
[0021] In the accompanying drawings of this embodiment, the same or similar reference numerals correspond to the same or similar components; in the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the positional relationship in the accompanying drawings are only for illustrative purposes and cannot be understood as a limitation of this patent. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances.
[0022] It should be noted that in this article, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, article or device. Without further limitation, an element defined by the statement "including one..." does not exclude the existence of additional identical elements in the process, article or device including that element.
[0023] Embodiment 1 of the present utility model provides a boiler that utilizes the waste heat of hazardous waste flue gas, as Figure 1 , Figure 2 , Figure 3 shown, including a support assembly, a boiler body assembly, a boiler drum assembly, a heat conduction assembly, and a dust collection assembly. The support assembly is arranged at the bottom of the boiler body assembly for supporting the boiler body assembly. The boiler drum assembly is arranged on the boiler body assembly. The heat conduction assembly is arranged inside the boiler body assembly. The dust collection assembly is arranged at the bottom of the boiler body assembly. The front and rear ends of the boiler body assembly are respectively provided with a flue gas inlet 15 and a flue gas outlet 16.
[0024] Such as Figure 1 , Figure 2 , Figure 3As shown in the figure, the boiler body assembly includes a boiler body 2, a heat-insulating cotton layer 3, a heat-resistant concrete layer 4, and a membrane water wall 5. The heat-insulating cotton layer 3 and the heat-resistant concrete layer 4 are respectively arranged on the inner and outer sides of the boiler body 2. The membrane water wall 5 is arranged on the inner side of the heat-insulating cotton layer 3. The front and rear ends of the boiler body 2 are respectively connected to a flue gas inlet 15 and a flue gas outlet 16.
[0025] In the above solution, by arranging the heat-insulating cotton layer 3, the heat-resistant concrete layer 4, and the membrane water wall 5, the high-temperature resistance and heat preservation performance inside the boiler body 2 are effectively enhanced.
[0026] As Figure 1 and Figure 2 shown in the figure, the support assembly includes a support 1. The support 1 is arranged at the bottom of the boiler body 2 and is used to support the boiler body 2.
[0027] As Figure 1 and Figure 2 shown in the figure, the drum assembly includes an upper drum 6 and a header 7. The upper drum 6 is arranged at the top of the boiler body 2 and is used for storing water and separating steam and water. There are two headers 7, which are respectively arranged on both sides of the bottom of the boiler body 2 and are used for distributing and storing water to reduce the thermal deviation.
[0028] As Figure 1 and Figure 3 shown in the figure, the heat conduction assembly includes heat conduction tubes 8. There are several heat conduction tubes 8, which are respectively arranged in the boiler body 2. The several heat conduction tubes 8 are arranged in four levels, and ash cleaning chambers 14 are respectively arranged between each level of the heat conduction tubes 8.
[0029] As Figure 1 and Figure 3 shown in the figure, a dust settling chamber 13 is arranged between the first-level heat conduction tube 8 and the flue gas inlet 15 and is used for reducing the dust in the hazardous waste flue gas.
[0030] As Figure 1 and Figure 3 shown in the figure, ash bins 10 for collecting dust are respectively arranged at the lower parts of each level of the heat conduction tubes 8, and an automatic ash discharge valve 11 is arranged at the bottom of the ash bin 10.
[0031] As Figure 1 and Figure 3 shown in the figure, the dust collection assembly includes an ash receiving hopper 12. An ash receiving hopper 12 is arranged between each automatic ash discharge valve 11 and the ground.
[0032] As Figure 1 and Figure 3 shown in the figure, movable ash cleaning doors 9 are respectively arranged between each ash cleaning chamber 14 and the heat conduction tubes 8. An insulating layer is arranged inside the movable ash cleaning doors 9 and is used for cleaning the dust deposited in the ash cleaning chamber 14.
[0033] In the above solution, the sintered ash accumulated on the heat conduction pipe 8 is removed by a special tool and falls into the ash bin 10. After a certain weight is collected, the automatic ash discharge valve 11 discharges into the ash hopper 12 under the action of a counterweight. The storage capacity of the ash bin 10 is determined according to the counterweight of the automatic ash discharge valve 11. According to the usage requirements, the ash hopper 12 is regularly transported away from the waste heat boiler area.
[0034] The working principle of the present utility model is as follows:
[0035] As Figure 1 、 Figure 2 、 Figure 3 shown, when the present utility model is in use, the upper drum 6 and the left and right headers 7 are arranged vertically. The heat conduction pipes 8 are respectively arranged in the middle of the boiler body 2. The heat conduction pipes 8 are arranged in four levels, and ash cleaning chambers 14 are respectively arranged between each level of heat conduction pipes. Movable ash cleaning doors 9 are respectively arranged at the positions of the ash cleaning chambers 14 and the heat conduction pipes 8. Heat insulation layers are arranged inside the movable ash cleaning doors 9, and the structure is connected to the boiler membrane water wall 5 to play a role of heat insulation and sealing. A dust settling chamber 13 is arranged inside the first level of the heat conduction pipe 8. Four ash bins 10 for collecting dust are respectively arranged at the lower part of the heat conduction pipe 8, and an automatic ash discharge valve 11 is connected to the lower part thereof. The automatic ash discharge valve 11 has a clearance height adapted to the height of the ash receiving hopper 12 arranged on the ground.
[0036] When in use, the sintered ash accumulated on the heat conduction pipe 8 is removed by a special tool and falls into the ash bin 10. After a certain weight is collected, the automatic ash discharge valve 11 discharges into the ash hopper 12 under the action of a counterweight. The storage capacity of the ash bin 10 is determined according to the counterweight of the automatic ash discharge valve 11. According to the usage requirements, the ash hopper 12 is regularly transported away from the waste heat boiler area.
[0037] The above is only a preferred embodiment of the present utility model and is not intended to limit the protection scope of the present utility model.
Claims
1. A boiler utilizing waste heat from hazardous waste flue gas, characterized in that: It includes a supporting assembly, a pot body assembly, a drum assembly, a heat-conducting assembly, and a dust collecting assembly. The supporting assembly is arranged at the bottom of the pot body assembly to support the pot body assembly. The drum assembly is arranged on the pot body assembly. The heat-conducting assembly is arranged in the pot body assembly. The dust collecting assembly is arranged at the bottom of the pot body assembly. A smoke inlet and a smoke outlet are respectively arranged at the front and rear ends of the pot body assembly.
2. The boiler utilizing waste heat from hazardous waste flue gas according to claim 1 is characterized in that: The boiler body assembly includes a boiler body, a thermal insulation cotton layer, a heat-resistant concrete layer, and a membrane water-cooled wall. The thermal insulation cotton layer and the heat-resistant concrete layer are respectively arranged on the inner and outer sides of the boiler body, and the membrane water-cooled wall is arranged on the inner side of the thermal insulation cotton layer. The front and rear ends of the boiler body are respectively connected to the flue gas inlet and the flue gas outlet.
3. The boiler utilizing waste heat from hazardous waste flue gas according to claim 2 is characterized in that: The support assembly comprises a support, which is arranged at the bottom of the boiler body and is used to support the boiler body.
4. The boiler utilizing waste heat from hazardous waste flue gas according to claim 3 is characterized in that: The drum assembly comprises an upper drum and a header. The upper drum is arranged on the top of the boiler body. The header comprises two headers, which are respectively arranged on both sides of the bottom of the boiler body.
5. The boiler utilizing waste heat from hazardous waste flue gas according to claim 4 is characterized in that: The heat conduction component includes a heat conduction pipe, and the heat conduction pipe includes a plurality of heat conduction pipes, which are respectively arranged in the boiler body. The plurality of heat conduction pipes are arranged in four levels, and a dust cleaning chamber is respectively provided between the heat conduction pipes at each level.
6. The boiler utilizing waste heat from hazardous waste flue gas according to claim 5 is characterized in that: A dust reduction chamber is arranged between the first-stage heat-conducting pipe and the flue gas inlet to reduce dust in the hazardous waste flue gas.
7. The boiler utilizing waste heat from hazardous waste flue gas according to claim 6 is characterized in that: An ash bin for collecting dust is respectively arranged at the lower part of each level of the heat conduction pipe, and an automatic ash discharge valve is arranged at the bottom of the ash bin.
8. The boiler utilizing waste heat from hazardous waste flue gas according to claim 7 is characterized in that: The dust collection assembly comprises an ash receiving hopper, and an ash receiving hopper is arranged between each automatic ash discharge valve and the ground.
9. The boiler utilizing waste heat from hazardous waste flue gas according to any one of claims 5 to 8, characterized in that: A movable cleaning door is respectively arranged between each of the cleaning chambers and the heat conducting pipe, and a heat insulating layer is arranged inside the movable cleaning door for cleaning dust deposited in the cleaning chamber.