Efficient denitration device for cement kiln

Abstract

The utility model discloses an efficient denitration device for a cement kiln, which belongs to the field of cement kiln denitration, and comprises a denitration component and a circulating component, the denitration component comprises a bottom tank, the upper end of the bottom tank is detachably connected with a conical tank, the upper end of the conical tank is fixedly connected with a denitration cylinder, the upper end of the denitration cylinder is connected with a sealing cover, and the sealing cover is connected with the circulating component. An activated carbon plate and a filter screen are respectively mounted in the bottom tank, a sponge body and a denitration agent are respectively mounted in the denitration cylinder, the upper end of the sealing cover is connected with a smoke exhaust pipe, and a sealing plug is inserted into the smoke exhaust pipe. And meanwhile, through mutual cooperation of the structures, cooling water can be recycled, so that water resources can be saved, and the cost loss can be reduced.

Description

Technical Field

[0001] The utility model relates to the field of cement kiln denitration, in particular to a high-efficiency denitration device for cement kilns. Background Art

[0002] The cement industry air pollutant emission standard "GB4915-2013" stipulates: the NOx emission standard for general areas is 400mg / m3, and the NOx emission standard for key areas is 300mg / m3. With the introduction of the "Three-Year Action Plan to Win the Blue Sky Defense War", various localities and related industries have formulated corresponding emission standards and further strictly controlled on the basis of the original standards. SNCR denitrification technology is the mainstream mature technology in the cement kiln industry at home and abroad. It has been maturely applied in the cement industry and can achieve the original emission standard. The cement kiln is a device for cement production. After cement production, a large amount of nitrate is mixed in the flue gas inside. In order to avoid flue gas emissions from polluting the environment, it is necessary to perform denitrification operations on it, and then a denitrification device is needed. Among them, the "a cement kiln flue gas denitrification device" disclosed in the application number "CN201820914769.8" is also an increasingly mature technology. Its "the filter structure installed inside the cement kiln flue gas denitrification device can effectively filter the flue gas passing through the device when the smoke passes through the device. , the filter structure is installed with two groups, so that the smoke inside the device can be filtered twice, so that the smoke inside the device can be effectively filtered. A smoke dispersion chamber is installed inside the device, and two groups of rotating fans are installed inside the smoke dispersion chamber, so that the smoke inside the device can be effectively absorbed. An inner groove with an inclined groove inside is installed on the top of the rotating fan, so that the activated carbon can be put into the inner groove, so that the activated carbon inside the inner groove can play the role of filtering smoke. ", but the denitrification device has the following defects during use: the denitrification device can indeed filter the flue gas twice through the set filtering structure, but the filtering effect of the flue gas is not significant enough only through the cooperation of the above structures, thereby affecting the filtering quality. Based on this, it is necessary to provide a denitrification device that can filter the flue gas multiple times and significantly improve the filtering effect. In addition, when the existing denitrification device cools the flue gas, it is not convenient to recycle the cooling water, which may lead to waste of water resources. Based on this, it is necessary to provide a denitrification device that can facilitate the recycling of water resources, save water resources, and thus reduce cost losses. Utility Model Content

[0003] The embodiment of the utility model provides a high-efficiency denitration device for cement kilns, aiming to solve the problem that the existing denitration device is not convenient for circulating denitration of flue gas and is not convenient for recycling water resources.

[0004] To achieve the above-mentioned purpose, the utility model provides a high-efficiency denitration device for a cement kiln, comprising a denitration component and a circulation component;

[0005] The denitration assembly comprises a bottom tank, the upper end of which is detachably connected to a conical tank, the upper end of which is fixedly connected to a denitration cylinder, the upper end of which is connected to a sealing cover, an activated carbon plate and a filter are respectively installed inside the bottom tank, a sponge and a denitration agent are respectively installed inside the denitration cylinder, the upper end of the sealing cover is connected to a smoke exhaust pipe, and a sealing plug is inserted inside the smoke exhaust pipe;

[0006] The circulation component includes a circulation pump installed on one side of the denitrification cylinder, the upper and lower ends of the circulation pump are respectively connected to a discharge pipe and a suction pipe, the end of the discharge pipe is threadedly connected to a nozzle, and a mounting shell is installed on the other side of the denitrification cylinder, an impeller is installed inside the mounting shell, a transmission plate is clamped inside the impeller, and a servo motor is connected to the upper end of the transmission plate, and an air intake pipe and an air suction pipe are connected to the upper and lower ends of the mounting shell.

[0007] As a preferred solution of the utility model, the opposite surfaces of the bottom tank and the conical tank are connected with a first flange and a second flange, the surfaces of the first flange and the second flange are provided with a plurality of screw holes, the interiors of the plurality of screw holes are threadedly connected with bolts, and the lower ends of the bolts are threadedly connected with nuts.

[0008] As a preferred solution of the utility model, the two sides of the bottom tank are respectively connected with a first side tube and a second side tube, the first side tube and the second side tube are both connected to the bottom tank, one side of the denitrification cylinder is connected with a third side tube, the third side tube is connected to the interior of the denitrification cylinder, the lower end of the liquid extraction pipe is connected to the second side tube, and the air intake pipe and the air extraction pipe are respectively connected to the third side tube and the first side tube.

[0009] As a preferred solution of the utility model, an annular groove is provided at the upper end of the denitration cylinder, and a connecting ring is fixedly connected to the lower end of the sealing cover, and the connecting ring is clamped in the inner part of the annular groove.

[0010] As a preferred solution of the utility model, the inner wall of the bottom tank is provided with two grooves, and the side surfaces of the activated carbon plate and the filter are fixedly connected with convex ridges, and the convex ridges are snapped into the inside of the grooves.

[0011] As a preferred solution of the utility model, a connecting rod is installed inside the conical tank, and connecting holes are opened on the surfaces of the activated carbon plate and the filter screen, and the connecting rod is inserted into the inside of the connecting hole.

[0012] As a preferred solution of the utility model, a mounting plate is fixedly connected to the upper end of the sealing cover, and a mounting groove is formed at the upper end of the mounting plate.

[0013] As a preferred solution of the utility model, a discharge pipe is fixedly connected to one side of the bottom tank, and a discharge hopper is movably connected to the upper end of the discharge pipe.

[0014] As a preferred solution of the utility model, a first connecting piece is fixedly connected to the lower end of the air intake pipe, a second connecting piece is fixedly connected to the upper end of the servo motor, and the first connecting piece and the second connecting piece are threadedly connected.

[0015] As a preferred solution of the utility model, one end of the drain pipe is fixedly connected with a mounting plate, and the mounting plate is mounted inside the mounting groove.

[0016] Compared with the prior art, the beneficial effects of the utility model are:

[0017] 1. When denitrifying the flue gas, firstly, the cooling water is stored in the bottom tank through the lower hopper, and then the flue gas is discharged into the bottom tank, and then the flue gas rises. At this time, the harmful particles in the flue gas are filtered through the filter screen and the activated carbon plate, and then the sponge can further filter the small particles in the flue gas. Finally, the flue gas passes through the denitrifier, and the flue gas can be denitrified by the denitrifier. At the same time, the nozzle sprays the cooling water in the form of mist to cool the flue gas, and at the same time, the servo motor is started to drive the impeller to rotate to extract the flue gas in the denitrification cylinder and re-discharge it into the bottom tank, so as to facilitate secondary filtration and denitrification. Compared with the denitrification device in the prior art "a cement kiln flue gas denitrification device", the utility model can filter and denitrify the flue gas multiple times through the above-mentioned structures cooperating with each other, thereby significantly improving the denitrification quality;

[0018] 2. When the denitrification device is performing the denitrification operation, the cooling water stored in the bottom tank is extracted by starting the circulation pump in cooperation with the liquid extraction pipe and discharged through the liquid discharge pipe and the nozzle, and the cooling water is sprayed out in a mist form through the nozzle to facilitate the cooling operation of the flue gas. At the same time, the cooling water falls back into the bottom tank and is re-extracted by the circulation pump for recycling. Compared with the denitrification device in the prior art "a cement kiln flue gas denitrification device", the utility model can facilitate the recycling of cooling water through the cooperation of the above-mentioned structures, thereby saving water resources and thus saving cost losses. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0020] Figure 2 This is a disassembled diagram of the bottom tank structure of the utility model;

[0021] Figure 3 This is a disassembly diagram of the denitration cylinder structure of the utility model;

[0022] Figure 4 This is a disassembly diagram of the sealing cover structure of the utility model;

[0023] Figure 5 This is a disassembled diagram of the denitration component structure of the utility model;

[0024] Figure 6 This is a disassembled diagram of the circulation component structure of the utility model;

[0025] Figure 7 This is a disassembled diagram of the exhaust mechanism structure of the utility model.

[0026] In the figure: 100, denitration assembly; 101, bottom tank; 102, conical tank; 103, denitration cylinder; 104, sealing cover; 105, activated carbon plate; 106, filter screen; 107, sponge; 108, denitration agent; 109, exhaust pipe; 110, sealing plug; 111, first flange; 112, second flange; 113, screw hole; 114, bolt; 115, nut; 121, first side pipe; 122, second side pipe; 123, third side pipe; 131, annular groove; 132, connecting ring; 14 1. groove; 142. convex ridge; 151. connecting rod; 152. connecting hole; 161. mounting plate; 162. mounting groove; 171. discharge pipe; 172. discharge hopper; 200. circulation assembly; 201. circulation pump; 202. discharge pipe; 203. suction pipe; 204. nozzle; 205. mounting shell; 206. impeller; 207. transmission plate; 208. servo motor; 209. air inlet pipe; 210. suction pipe; 211. first connecting plate; 212. second connecting plate; 221. mounting plate. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] See also Figure 1-7 , the utility model provides a high-efficiency denitration device for a cement kiln, comprising a denitration component 100 and a circulation component 200;

[0029] The denitration assembly 100 includes a bottom tank 101, the upper end of the bottom tank 101 is detachably connected to a conical tank 102, the upper end of the conical tank 102 is fixedly connected to a denitration cylinder 103, the upper end of the denitration cylinder 103 is connected to a sealing cover 104, an activated carbon plate 105 and a filter screen 106 are respectively installed inside the bottom tank 101, a sponge 107 and a denitration agent 108 are respectively installed inside the denitration cylinder 103, an upper end of the sealing cover 104 is connected to a smoke exhaust pipe 109, and a sealing plug 110 is inserted into the smoke exhaust pipe 109;

[0030] The circulation component 200 includes a circulation pump 201 installed on one side of the denitrification cylinder 103, the upper and lower ends of the circulation pump 201 are respectively connected to a discharge pipe 202 and a suction pipe 203, the end of the discharge pipe 202 is threadedly connected to a nozzle 204, and a mounting shell 205 is installed on the other side of the denitrification cylinder 103, an impeller 206 is installed inside the mounting shell 205, a transmission plate 207 is clamped inside the impeller 206, and a servo motor 208 is connected to the upper end of the transmission plate 207, and an intake pipe 209 and an exhaust pipe 210 are connected to the upper and lower ends of the mounting shell 205.

[0031] In a specific embodiment, the denitrification component 100 is arranged in cooperation with the circulation component 200 to perform multiple circulation filtration and denitrification operations on the flue gas, thereby significantly improving the denitrification quality of the denitrification device. At the same time, the cooling water can be recycled through the cooperation of the above-mentioned structures, thereby saving water resources and reducing cost losses. When the flue gas from the cement kiln is denitrified, the flue gas is first discharged into the bottom of the bottom tank 101. At this time, the flue gas rises from the bottom tank 101 and the denitrification cylinder 103. At this time, the large particles in the flue gas are initially filtered through the activated carbon plate 105 and the filter screen 106. At the same time, the sponge 107 can filter the small particles in the flue gas. The substances are further filtered, and finally the flue gas is denitrated by the denitrifier 108. At the same time, the circulating pump 201 is started to cooperate with the liquid extraction pipe 203 to extract the cooling water in the bottom tank 101, and the cooling water is sprayed out in the form of mist through the discharge pipe 202 and the nozzle 204, so as to cool the flue gas. Then the servo motor 208 is started to rotate the transmission plate 207, thereby rotating the impeller 206, and then the flue gas in the denitrification cylinder 103 can be extracted and discharged into the bottom tank 101 through the air inlet pipe 209, so as to carry out secondary filtration and denitrification, thereby enhancing the denitrification quality of the denitrification device, and at the same time saving water resources and reducing cost losses.

[0032] See also Figure 2-Figure 5 The opposite surfaces of the bottom tank 101 and the conical tank 102 are connected with a first flange 111 and a second flange 112. The surfaces of the first flange 111 and the second flange 112 are provided with a plurality of screw holes 113. Bolts 114 are threadedly connected to the interiors of the plurality of screw holes 113. Nuts 115 are threadedly connected to the lower ends of the bolts 114.

[0033] In a specific embodiment, the bolt 114 is threadedly connected inside the screw hole 113, and the nut 115 is matched to enhance the connection strength and tightness between the bottom tank 101 and the conical tank 102. At the same time, the bottom tank 101 and the conical tank 102 can be disassembled by removing the bolt 114.

[0034] See also Figure 2-Figure 5 , the two sides of the bottom tank 101 are respectively connected with the first side tube 121 and the second side tube 122, and the first side tube 121 and the second side tube 122 are both connected to the bottom tank 101, and one side of the denitrification cylinder 103 is connected with the third side tube 123, and the third side tube 123 is connected to the inside of the denitrification cylinder 103, the lower end of the liquid extraction pipe 203 is connected to the second side tube 122, and the air intake pipe 209 and the air extraction pipe 210 are respectively connected to the third side tube 123 and the first side tube 121.

[0035] In a specific embodiment, the first side pipe 121 cooperates with the third side pipe 123 to facilitate the installation of the air intake pipe 209 and the air extraction pipe 210 with the bottom tank 101 and the denitrification cylinder 103 respectively, and the second side pipe 122 facilitates the connection of the liquid extraction pipe 203 and the bottom tank 101 to facilitate the circulation of flue gas and cooling water.

[0036] See also Figure 2-Figure 5 An annular groove 131 is formed at the upper end of the denitration cylinder 103 , and a connecting ring 132 is fixedly connected to the lower end of the sealing cover 104 , and the connecting ring 132 is clamped in the inner part of the annular groove 131 .

[0037] In a specific embodiment, the connection ring 132 is clamped in the annular groove 131 to facilitate the quick disassembly and assembly of the sealing cover 104, thereby improving the convenience of disassembly and assembly.

[0038] See also Figure 2-Figure 5 The inner wall of the bottom tank 101 is provided with two grooves 141 , and the side surfaces of the activated carbon plate 105 and the filter screen 106 are fixedly connected with convex ridges 142 , which are clamped in the interior of the grooves 141 .

[0039] In a specific embodiment, the convex ribs 142 are clamped in the grooves 141 to facilitate the disassembly and assembly of the activated carbon plate 105 and the filter screen 106 , thereby improving the convenience of disassembly and assembly and replacement of the activated carbon plate 105 and the filter screen 106 .

[0040] See also Figure 2-Figure 5 A connecting rod 151 is installed inside the conical tank 102 , and connecting holes 152 are opened on the surfaces of the activated carbon plate 105 and the filter screen 106 , and the connecting rod 151 is inserted into the inside of the connecting hole 152 .

[0041] In a specific embodiment, the connecting rod 151 inserted into the connecting hole 152 can facilitate the connection between the activated carbon plate 105 and the filter 106. The activated carbon plate 105 and the filter 106 can be lifted out by pulling the connecting rod 151 to facilitate disassembly and assembly.

[0042] See also Figure 2-Figure 5 The upper end of the sealing cover 104 is fixedly connected with a mounting plate 161 , and the upper end of the mounting plate 161 is provided with a mounting groove 162 .

[0043] In a specific embodiment, the mounting plate 161 cooperates with the mounting groove 162 to improve the installation stability of the drain pipe 202, thereby improving the smoothness of the denitrification operation.

[0044] See also Figure 2-Figure 5 A discharge pipe 171 is fixedly connected to one side of the bottom tank 101 , and a discharge hopper 172 is movably connected to the upper end of the discharge pipe 171 .

[0045] In a specific embodiment, the discharge pipe 171 cooperates with the discharge hopper 172 to facilitate water supply, thereby further improving the ease of use of the denitrification device.

[0046] See also Figure 6 and Figure 7 A first connecting piece 211 is fixedly connected to the lower end of the air inlet pipe 209, and a second connecting piece 212 is fixedly connected to the upper end of the servo motor 208. The first connecting piece 211 and the second connecting piece 212 are threadedly connected.

[0047] In a specific embodiment, the first connecting piece 211 and the second connecting piece 212 are connected to connect the servo motor 208 and the air intake pipe 209 , thereby improving the installation stability of the servo motor 208 .

[0048] See also Figure 6 and Figure 7 One end of the drain pipe 202 is fixedly connected with a mounting piece 221 , and the mounting piece 221 is installed inside the mounting groove 162 .

[0049] In a specific embodiment, the installation sheet 221 is installed inside the installation groove 162 to improve the installation stability of the drain pipe 202, so as to facilitate the cooling water circulation work.

[0050] Working principle: When denitrifying the flue gas from the cement kiln, the flue gas is first discharged into the bottom of the bottom tank 101 so that the flue gas rises from the bottom tank 101 and the denitrification cylinder 103, and the large particles in the flue gas are initially filtered through the activated carbon plate 105 and the filter 106, and then the small particles in the flue gas can be further filtered through the sponge 107, and finally the flue gas is denitrified by the denitrifier 108, and then the circulation pump 201 is started to cooperate with the liquid extraction pipe 203 to extract the cooling water in the bottom tank 101, and the cooling water is sprayed in the form of mist through the liquid discharge pipe 202 and the nozzle 204 to cool the flue gas, and then the servo motor 208 is started to rotate with the transmission plate 207 and the impeller 206, so that the flue gas in the denitrification cylinder 103 can be extracted and discharged into the bottom tank 101 through the air inlet pipe 209 for secondary filtration and denitrification, thereby enhancing the denitrification quality of the denitrification device and enhancing the practicality of the denitrification device.

[0051] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0052] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A high-efficiency denitrification device for cement kilns, characterized in that: include: A denitration component (100), the denitration component (100) comprising a bottom tank (101), the upper end of the bottom tank (101) being detachably connected to a conical tank (102), the upper end of the conical tank (102) being fixedly connected to a denitration cylinder (103), the upper end of the denitration cylinder (103) being connected to a sealing cover (104), an activated carbon plate (105) and a filter screen (106) being installed inside the bottom tank (101), a sponge (107) and a denitration agent (108) being installed inside the denitration cylinder (103), the upper end of the sealing cover (104) being connected to a smoke exhaust pipe (109), and a sealing plug (110) being inserted inside the smoke exhaust pipe (109); A circulation component (200), the circulation component (200) comprising a circulation pump (201) installed on one side of a denitration cylinder (103), the upper and lower ends of the circulation pump (201) being respectively connected to a liquid discharge pipe (202) and a liquid extraction pipe (203), the end of the liquid discharge pipe (202) being threadedly connected to a nozzle (204), a mounting shell (205) being installed on the other side of the denitration cylinder (103), an impeller (206) being installed inside the mounting shell (205), a transmission plate (207) being clamped inside the impeller (206), a servo motor (208) being connected to the upper end of the transmission plate (207), and an air intake pipe (209) and an air extraction pipe (210) being connected to the upper and lower ends of the mounting shell (205).

2. The high-efficiency denitration device for cement kiln according to claim 1, characterized in that: The opposing surfaces of the bottom tank (101) and the conical tank (102) are connected with a first flange (111) and a second flange (112); the surfaces of the first flange (111) and the second flange (112) are provided with a plurality of screw holes (113); the interiors of the plurality of screw holes (113) are threadedly connected with bolts (114); and the lower ends of the bolts (114) are threadedly connected with nuts (115).

3. The high-efficiency denitrification device for cement kiln according to claim 1, characterized in that: The two sides of the bottom tank (101) are respectively connected to a first side tube (121) and a second side tube (122), the first side tube (121) and the second side tube (122) are both connected to the bottom tank (101), one side of the denitration cylinder (103) is connected to a third side tube (123), the third side tube (123) is connected to the inside of the denitration cylinder (103), the lower end of the liquid extraction pipe (203) is connected to the second side tube (122), and the air intake pipe (209) and the air extraction pipe (210) are respectively connected to the third side tube (123) and the first side tube (121).

4. The high-efficiency denitrification device for cement kiln according to claim 1, characterized in that: An annular groove (131) is formed at the upper end of the denitration cylinder (103), and a connecting ring (132) is fixedly connected to the lower end of the sealing cover (104), wherein the connecting ring (132) is clamped inside the annular groove (131).

5. The high-efficiency denitrification device for cement kiln according to claim 1, characterized in that: The inner wall of the bottom tank (101) is provided with two grooves (141), and the side surfaces of the activated carbon plate (105) and the filter screen (106) are fixedly connected with convex ridges (142), and the convex ridges (142) are clamped inside the grooves (141).

6. The high-efficiency denitration device for cement kiln according to claim 1, characterized in that: A connecting rod (151) is installed inside the conical tank (102), and connecting holes (152) are provided on the surfaces of the activated carbon plate (105) and the filter screen (106), and the connecting rod (151) is inserted into the inside of the connecting hole (152).

7. The high-efficiency denitrification device for cement kiln according to claim 1, characterized in that: The upper end of the sealing cover (104) is fixedly connected to a mounting plate (161), and the upper end of the mounting plate (161) is provided with a mounting groove (162).

8. The high-efficiency denitration device for cement kiln according to claim 1, characterized in that: A material discharge pipe (171) is fixedly connected to one side of the bottom tank (101), and a material discharge hopper (172) is movably connected to the upper end of the material discharge pipe (171).

9. The high-efficiency denitration device for cement kiln according to claim 1, characterized in that: The lower end of the air intake pipe (209) is fixedly connected to a first connecting piece (211), the upper end of the servo motor (208) is fixedly connected to a second connecting piece (212), and the first connecting piece (211) and the second connecting piece (212) are threadedly connected.

10. The high-efficiency denitrification device for cement kiln according to claim 1, characterized in that: One end of the liquid discharge pipe (202) is fixedly connected to a mounting plate (221), and the mounting plate (221) is mounted inside the mounting groove (162).

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