Low-nitrogen combustion device
By adopting an upper and lower layered combustion structure and exhaust gas treatment system in the low-nitrogen combustion device, the problem of poor nitrogen oxide emission reduction and exhaust gas purification effects during coal powder combustion in the prior art is solved, and more efficient combustion and lower pollution waste gas emissions are achieved.
Patent Information
- Application Number
- CN202421754167.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-23
- Publication Date
- 2025-05-27
- Estimated Expiration
- 2034-07-23
AI Technical Summary
When the existing low-nitrogen combustion device is burning, it is difficult for a single air preloader to efficiently reduce nitrogen oxide emissions, and lacks an effective purification structure to purify the combustion exhaust gas.
A low-nitrogen combustion device is designed, adopting an upper and lower layered combustion structure, an exhaust gas dust removal structure and an exhaust gas filter structure. The combustion tank is divided into two upper and lower combustion chambers through a division ring. Ultra-fine coal powder assists in secondary combustion with conventional coal powder, and the exhaust gas is treated through an air pre-charger, a dust collector and a filter cartridge.
It significantly improves the effect of coal powder combustion, reduces the generation of nitrogen oxides and the pollution of waste gas, and improves the ability of combustion devices to reduce nitrogen oxide emissions and purify waste gas.
Smart Images
Figure CN222911617U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the field of pulverized coal combustion, and particularly relates to a low-nitrogen combustion device. Background Art
[0002] A low-nitrogen combustion device is a device used to control nitrogen oxide emissions during the combustion process. It usually reduces the nitrogen oxide emissions generated during combustion by optimizing the mixing method of fuel and air or using specific combustion technologies.
[0003] When the existing combustion device is used for pulverized coal combustion, it often controls the generation of nitrogen oxides during the combustion process through an air preheater. The air preheater reduces the combustion temperature by reintroducing a part of the combustion exhaust gas back into the burner or the combustion area to reduce the generation of nitrogen oxide emissions. However, a single air preheater has a poor effect on reducing nitrogen oxides generated during pulverized coal combustion, and there is a lack of an effective purification structure to purify the combustion exhaust gas.
[0004] Therefore, aiming at the problem that the single emission reduction structure of the above combustion device is often difficult to efficiently reduce nitrogen oxides generated during conventional pulverized coal combustion, and its effect of purifying and filtering the combustion exhaust gas is also poor when used for pulverized coal combustion, a low-nitrogen combustion device is developed. By installing an upper and lower stratified combustion structure, an exhaust gas dust removal structure, and an exhaust gas filtration structure on the combustion device, the combustion effect of the structure on conventional pulverized coal can be greatly improved, the amount of nitrogen oxides generated during combustion can be reduced, and the impact on the air during exhaust gas emission can also be reduced. Summary of the Utility Model
[0005] In order to overcome the problems that the combustion device has a poor combustion effect on conventional pulverized coal and the exhaust gas generated by it has a large pollution to the air when used for pulverized coal combustion.
[0006] The technical solution of the utility model is: a low-nitrogen combustion device, which includes a carrier frame, and also includes a tank body assembly, an exhaust assembly, a first feeding assembly, and a second feeding assembly. The lower outer wall of the tank body assembly is installed with a carrier frame. The upper end of the tank body assembly is provided with an exhaust assembly for dust removal and filtration of the pulverized coal after secondary combustion. The upper and lower sides of the right outer wall of the tank body assembly are respectively installed with a first feeding assembly for preliminary combustion of the pulverized coal and a second feeding assembly for secondary combustion of the pulverized coal. The tank body assembly includes a combustion tank, a dividing ring, a first connecting block, a first connecting groove, a second connecting groove, a second connecting block, a third connecting groove, a fourth connecting groove, and an electric feeding hopper. The lower end of the combustion tank is fixedly connected with the electric feeding hopper. The lower outer wall of the combustion tank is fixedly connected with the carrier frame. The center of the inner wall of the combustion tank is installed with a dividing ring that divides the internal space of the combustion tank into two parts.
[0007] Preferably, conventional pulverized coal can be conveyed to the inner wall of the lower end of the tank assembly through the second feeding assembly for preliminary combustion, and the superfine pulverized coal can be conveyed to the inner wall of the upper end of the tank assembly by the first feeding assembly to perform secondary combustion on the conventionally pulverized coal after preliminary combustion, so as to completely burn the conventional pulverized coal and thereby reduce the generation of nitrogen oxides.
[0008] Preferably, a first connecting block is fixedly connected to the upper side of the outer wall of the combustion tank. First connecting grooves are formed through the upper sides of the left and right ends of the first connecting block, and second connecting grooves are formed through the lower sides of the left and right ends of the first connecting block. The first connecting grooves and the second connecting grooves communicate with the internal space at the upper end of the combustion tank separated by the dividing ring. During use, the internal space of the combustion tank can be divided into upper and lower combustion chambers by the dividing ring. The lower combustion chamber can perform preliminary combustion on conventional pulverized coal, and the upper combustion chamber side can assist the conventional pulverized coal with superfine pulverized coal for secondary combustion to fully burn it and reduce the nitrogen oxides generated during the combustion of pulverized coal.
[0009] Preferably, a second connecting block is fixedly connected to the upper side of the outer wall of the combustion tank. Third connecting grooves are formed through the upper sides of the left and right ends of the second connecting block, and fourth connecting grooves are formed through the lower sides of the left and right ends of the second connecting block. The third connecting grooves and the fourth connecting grooves communicate with the internal space at the lower end of the combustion tank separated by the dividing ring. During use, superfine pulverized coal can be conveyed into the upper combustion chamber through the first connecting grooves and the second connecting grooves, and conventional pulverized coal can be conveyed into the lower combustion chamber through the third connecting grooves and the fourth connecting grooves to improve the combustion effect of the pulverized coal.
[0010] Preferably, the exhaust assembly includes a tank cover, an exhaust pipe, an air preheater, a dust collector, and a filter cartridge. The tank cover is threadedly installed on the inner wall of the upper end of the combustion tank, and an exhaust pipe is installed at the upper end of the tank cover. The exhaust pipe is bent. During use, the air preheater can reintroduce the combustion exhaust gas into the combustion tank to reduce the combustion temperature and thereby reduce the generation of nitrogen oxides.
[0011] Preferably, an air preheater and a dust collector are installed on the exhaust pipe, and a filter cartridge is installed at the upper end of the exhaust pipe. The air preheater is located at the right end of the dust collector. During use, the dust collector can remove the particles in the combustion exhaust gas, and the filter cartridge can filter the exhaust gas after dust removal to reduce the pollution during exhaust gas emission.
[0012] Preferably, the first feeding assembly includes a first blower, a first connecting pipe, and a first storage tank. The output unit of the first blower is installed in the first connecting groove, one end of the first connecting pipe is installed in the second connecting groove, and the other end of the first connecting pipe is installed with a first storage tank containing superfine pulverized coal. During use, the first blower can assist the superfine pulverized coal for combustion to improve its combustion effect in the combustion tank.
[0013] Preferably, the second feeding assembly includes a second blower, a second connecting pipe, and a second storage tank. The output unit of the second blower is installed in the third connecting groove, one end of the second connecting pipe is installed in the fourth connecting groove, and the other end of the second connecting pipe is installed with a second storage tank containing conventional pulverized coal. During use, the second blower can assist the combustion of conventional pulverized coal to improve its combustion effect in the combustion tank.
[0014] Advantages of the present utility model:
[0015] 1. The internal space of the combustion tank can be divided into upper and lower combustion chambers by the dividing ring. The lower combustion chamber can initially burn the conventional pulverized coal, while the upper combustion chamber can assist the conventional pulverized coal for secondary combustion through ultrafine pulverized coal to fully burn it and reduce nitrogen oxides generated during the combustion of pulverized coal.
[0016] 2. The preheater can reintroduce the combustion exhaust gas into the combustion tank to reduce the combustion temperature and thus reduce the generation of nitrogen oxides.
[0017] 3. The dust collector can remove the particles in the combustion exhaust gas, and cooperate with the filter cartridge to filter the exhaust gas after dust removal to reduce the pollution during exhaust gas emission. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 Shown is a three-dimensional structural schematic diagram of the low-nitrogen combustion device of the present utility model;
[0019] Figure 2 Shown is a three-dimensional structural exploded schematic diagram of the low-nitrogen combustion device of the present utility model;
[0020] Figure 3 Shown is a three-dimensional structural schematic diagram of the tank assembly and the carrier of the low-nitrogen combustion device of the present utility model;
[0021] Figure 4 Shown is a three-dimensional structural exploded schematic diagram of the first feeding assembly of the low-nitrogen combustion device of the present utility model;
[0022] Figure 5 Shown is a three-dimensional structural exploded schematic diagram of the second feeding assembly of the low-nitrogen combustion device of the present utility model;
[0023] Figure 6 Shown is a three-dimensional structural exploded schematic diagram of the exhaust assembly of the low-nitrogen combustion device of the present utility model.
[0024] Description of reference numerals: 101 - combustion tank, 102 - dividing ring, 103 - first connecting block, 104 - first connecting groove, 105 - second connecting groove, 106 - second connecting block, 107 - third connecting groove, 108 - fourth connecting groove, 109 - electric feeding hopper, 201 - tank cover, 202 - exhaust pipe, 203 - air preheater, 204 - dust collector, 205 - filter cartridge, 301 - first blower, 302 - first connecting pipe, 303 - first storage tank, 401 - second blower, 402 - second connecting pipe, 403 - second storage tank, 5 - bearing frame. Detailed implementation manner
[0025] The present utility model will be further described below in conjunction with the accompanying drawings and embodiments.
[0026] Please refer to Figures 1-6 , the present utility model provides an embodiment: a low - nitrogen combustion device, including a bearing frame 5, and further including a tank body assembly, an exhaust assembly, a first feeding assembly and a second feeding assembly. The lower outer wall of the tank body assembly is installed with a bearing frame 5. The upper end of the tank body assembly is provided with an exhaust assembly for dust removal and filtration of the pulverized coal after secondary combustion. The upper and lower sides of the right - hand outer wall of the tank body assembly are respectively installed with a first feeding assembly for preliminary combustion of the pulverized coal and a second feeding assembly for secondary combustion of the pulverized coal. The tank body assembly includes a combustion tank 101, a dividing ring 102, a first connecting block 103, a first connecting groove 104, a second connecting groove 105, a second connecting block 106, a third connecting groove 107, a fourth connecting groove 108 and an electric feeding hopper 109. The lower end of the combustion tank 101 is fixedly connected with an electric feeding hopper 109, and the lower outer wall of the combustion tank 101 is fixedly connected with a bearing frame 5. The center of the inner wall of the combustion tank 101 is installed with a dividing ring 102 that divides the inner space of the combustion tank 101 into two parts. Through the second feeding assembly, conventional pulverized coal can be conveyed to the lower inner wall of the tank body assembly for preliminary combustion, and the super - refined pulverized coal can be conveyed to the upper inner wall of the tank body assembly by the first feeding assembly to perform secondary combustion on the conventionally combusted pulverized coal, so as to completely combust the conventional pulverized coal, thereby reducing the generation of nitrogen oxides. The upper side of the outer wall of the combustion tank 101 is fixedly connected with a first connecting block 103. The upper sides of the left and right ends of the first connecting block 103 are penetrated and provided with a first connecting groove 104, and the lower sides of the left and right ends of the first connecting block 103 are penetrated and provided with a second connecting groove 105. The first connecting groove 104 and the second connecting groove 105 are communicated with the inner space at the upper end of the combustion tank 101 separated by the dividing ring 102. During use, the inner space of the combustion tank 101 can be divided into upper and lower two combustion chambers by the dividing ring 102. The lower combustion chamber can perform preliminary combustion on the conventional pulverized coal, and the upper combustion chamber can assist the conventional pulverized coal with super - refined pulverized coal for secondary combustion to fully combust it, so as to reduce the nitrogen oxides generated during the combustion of the pulverized coal.
[0027] Please refer toFigures 5-6 , in this embodiment, the first feeding assembly includes a first blower 301, a first connecting pipe 302 and a first storage tank 303. The output unit of the first blower 301 is installed in the first connecting groove 104. One end of the first connecting pipe 302 is installed in the second connecting groove 105, and the other end of the first connecting pipe 302 is installed with a first storage tank 303 containing superfine pulverized coal. When in use, the first blower 301 can assist the combustion of superfine pulverized coal to improve its combustion effect in the combustion tank 101. The second feeding assembly includes a second blower 401, a second connecting pipe 402 and a second storage tank 403. The output unit of the second blower 401 is installed in the third connecting groove 107. One end of the second connecting pipe 402 is installed in the fourth connecting groove 108, and the other end of the second connecting pipe 402 is installed with a second storage tank 403 containing conventional pulverized coal. When in use, the second blower 401 can assist the combustion of conventional pulverized coal to improve its combustion effect in the combustion tank 101.
[0028] Please refer to Figure 4 , in this embodiment, the exhaust assembly includes a tank cover 201, an exhaust pipe 202, an air preheater 203, a dust collector 204 and a filter cartridge 205. The tank cover 201 is threadedly installed on the upper inner wall of the combustion tank 101. The upper end of the tank cover 201 is installed with an exhaust pipe 202, and the exhaust pipe 202 is bent. When in use, the air preheater 203 can reintroduce the combustion exhaust gas into the combustion tank 101 to reduce the combustion temperature and reduce the generation of nitrogen oxides. The air preheater 203 and the dust collector 204 are installed on the exhaust pipe 202, and the filter cartridge 205 is installed at the upper end of the exhaust pipe 202. The air preheater 203 is located at the right end of the dust collector 204. When in use, the dust collector 204 can remove the particles in the combustion exhaust gas, and cooperate with the filter cartridge 205 to filter the exhaust gas after dust removal to reduce the pollution during exhaust gas emission.
[0029] When working, first, the conventional pulverized coal is conveyed into the combustion tank 101 separated into upper and lower combustion chambers by the dividing ring 102 through the delivery pump in the second storage tank 303, and the first blower 301 is used to convey the outside air into the lower combustion chamber to conduct preliminary combustion with the conventional pulverized coal;
[0030] Then, the superfine pulverized coal is conveyed into the upper combustion chamber in the combustion tank 101 through the delivery pump in the first storage tank 403, and the second blower 401 is used to convey the air into the upper combustion chamber to mix the conventional pulverized coal and the superfine pulverized coal, and then conduct sufficient combustion;
[0031] Then, the exhaust gas generated after combustion is transported through the exhaust pipe 202 to the air preheater 203 for emission reduction treatment. The dust in the exhaust gas after combustion can be removed by the dust collector 204, and then the filtered cylinder 205 filters and discharges the exhaust gas after dust removal to reduce the pollution during exhaust gas emission.
[0032] Through the above steps, the two upper and lower combustion chambers formed by the split ring 102 and the combustion tank 101 cooperate with the first blower 301 and the second blower 401 to enable the ultra-fine pulverized coal to assist the conventional pulverized coal in burning twice, so as to burn it sufficiently. The air preheater 203 and the dust collector 204 are used to remove dust and reduce emissions of the exhaust gas after combustion, and the filtered cylinder 205 filters and discharges the exhaust gas after dust removal, solving the problems that the combustion device has poor combustion effect on conventional pulverized coal during pulverized coal combustion and the exhaust gas generated by it has a large pollution to the air.
[0033] The above has described in detail the embodiments of the present invention in conjunction with the accompanying drawings. However, the present invention is not limited to the above embodiments, and various changes can be made without departing from the gist of the present invention within the scope of knowledge possessed by those skilled in the art.
Claims
1. A low nitrogen combustion device, comprising a carrier frame (5), characterized in that: The tank assembly also includes a tank assembly, an exhaust assembly, a first feed assembly and a second feed assembly. The lower outer wall of the tank assembly is provided with a carrier (5). The upper end of the tank assembly is provided with an exhaust assembly for dust removal and filtering of the coal powder after secondary combustion. The upper and lower sides of the right outer wall of the tank assembly are respectively provided with a first feed assembly for primary combustion of the coal powder and a second feed assembly for secondary combustion of the coal powder. The tank assembly includes a combustion tank (101), a split ring (102), a first connection block ( 103), a first connecting groove (104), a second connecting groove (105), a second connecting block (106), a third connecting groove (107), a fourth connecting groove (108) and an electric lower hopper (109); the lower end of the combustion pot (101) is fixedly connected to the electric lower hopper (109); the lower end outer wall of the combustion pot (101) is fixedly connected to a supporting frame (5); and the center of the inner wall of the combustion pot (101) is provided with a dividing ring (102) for dividing the internal space of the combustion pot (101) into two.
2. The low nitrogen combustion device according to claim 1, characterized in that: A first connecting block (103) is fixedly connected to the upper side of the outer wall of the combustion pot (101); first connecting grooves (104) are provided through the upper sides of the left and right ends of the first connecting block (103); second connecting grooves (105) are provided through the lower sides of the left and right ends of the first connecting block (103); the first connecting groove (104) and the second connecting groove (105) are connected to the internal space at the upper end of the combustion pot (101) separated by the dividing ring (102).
3. The low nitrogen combustion device according to claim 2, characterized in that: A second connecting block (106) is fixedly connected to the upper side of the outer wall of the combustion pot (101); third connecting grooves (107) are provided through the upper sides of the left and right ends of the second connecting block (106); fourth connecting grooves (108) are provided through the lower sides of the left and right ends of the second connecting block (106); the third connecting groove (107) and the fourth connecting groove (108) are connected to the internal space at the lower end of the combustion pot (101) separated by the dividing ring (102).
4. The low nitrogen combustion device according to claim 3, characterized in that: The exhaust assembly comprises a tank cover (201), an exhaust pipe (202), an air preheater (203), a dust collector (204) and a filter cartridge (205); the tank cover (201) is threadedly mounted on the upper inner wall of the combustion tank (101); the upper end of the tank cover (201) is mounted with an exhaust pipe (202); and the exhaust pipe (202) is curved.
5. The low nitrogen combustion device according to claim 4, characterized in that: An air preheater (203) and a dust collector (204) are installed on the exhaust pipe (202). A filter cartridge (205) is installed at the upper end of the exhaust pipe (202). The air preheater (203) is located at the right end of the dust collector (204).
6. The low nitrogen combustion device according to claim 5, characterized in that: The first feeding assembly comprises a first blower (301), a first connecting pipe (302) and a first storage tank (303); the output unit of the first blower (301) is installed in the first connecting groove (104); one end of the first connecting pipe (302) is installed in the second connecting groove (105); and the other end of the first connecting pipe (302) is installed with the first storage tank (303) containing ultrafine coal powder.
7. The low nitrogen combustion device according to claim 6, characterized in that: The second feeding assembly comprises a second blower (401), a second connecting pipe (402) and a second storage tank (403); the output unit of the second blower (401) is installed in the third connecting groove (107); one end of the second connecting pipe (402) is installed in the fourth connecting groove (108); and the other end of the second connecting pipe (402) is installed with a second storage tank (403) containing conventional coal powder.