Biomass boiler flue gas denitration equipment

Abstract

The utility model relates to the technical field of flue gas treatment equipment, in particular to biomass boiler flue gas denitration equipment which comprises an ingress pipe, an oxidation box, an oxidation layer frame, a fixing bolt and a treatment box, the introduction pipe is used for introducing the biomass boiler flue gas into the oxidation box, oxidation reduction is carried out through an oxidation layer frame in the oxidation box, NO in the flue gas is oxidized into NO2, the oxidation box introduces the oxidized flue gas into the treatment box, NO2 is absorbed through water or an alkaline solution in the treatment box, and flue gas denitration is achieved. A worker slides the fixing bolt towards one side far away from the oxidation layer frame by hands to separate the fixing bolt from the oxidation layer frame, and at the moment, the oxidation layer frame is pulled out of the oxidation box to be replaced, so that compared with the traditional flue gas denitration equipment, the operation is more convenient and rapid, and the problems that the replacement of a catalyst bed layer of the existing flue gas denitration equipment is inconvenient and the cost is high are solved. The connecting bolt needs to be disassembled by means of a tool, and operation is inconvenient.

Description

Technical Field

[0001] The utility model relates to the technical field of flue gas treatment equipment, in particular to a biomass boiler flue gas denitrification equipment. Background Art

[0002] Flue gas denitrification refers to reducing the generated NOX to N2, thereby removing NOX from the flue gas. According to the treatment process, it can be divided into wet denitrification and dry denitrification. Some researchers at home and abroad have also developed methods to treat NOX waste gas with microorganisms; since more than 90% of the NOX in the flue gas discharged from the combustion system is NO, and NO is difficult to dissolve in water, the wet treatment of NOX cannot use a simple washing method. The principle of flue gas denitrification is to use an oxidant to oxidize NO into NO2, and the generated NO2 is then absorbed by water or an alkaline solution to achieve denitrification.

[0003] At present, the prior art CN201020538241.9 discloses a flue gas denitration device and method for combustion equipment without adding an external reducing agent. The flue gas generated by the boiler flows through the economizer, and a discharge device is arranged in the flue connected to the economizer or the inlet of the denitration reactor. The discharge device adopts pulse discharge or DC discharge, and the discharge voltage is controlled between the corona inception voltage and the breakdown voltage. The high-energy electrons e generated by the discharge attack the carbon dioxide molecules, so that the carbon dioxide molecules are activated from the ground state to the excited state, and the excited carbon dioxide molecules are dissociated into CO and active substances. After the reaction, part of CO2 is converted to produce CO; the flue gas enters the denitration reactor through the flue connected to the inlet of the denitration reactor and the rectifying device, and the NO in the flue gas reacts with CO under the action of the catalyst bed in the denitration reactor to generate non-toxic N2 and CO2; the flue gas after the reaction is discharged through the flue connected to the outlet of the denitration reactor. The flue gas generated by the boiler flows through the economizer, and a discharge device is arranged in the economizer. The discharge device adopts pulse discharge or DC discharge, and the discharge voltage is controlled between the corona inception voltage and the breakdown voltage. The high-energy electrons e generated by the discharge attack the carbon dioxide molecules, so that the carbon dioxide molecules are activated from the ground state to the excited state. The excited carbon dioxide molecules dissociate into CO and active substances. After the reaction, part of the CO2 is converted to produce CO; the flue gas enters the denitrification reactor through the inlet of the denitrification reactor connected to the flue and the rectifier, and the NO in the flue gas reacts with the CO under the action of the catalyst bed in the denitrification reactor to generate non-toxic N2 and CO2; the flue gas after the reaction is discharged through the outlet of the denitrification reactor connected to the flue.

[0004] However, the effect of the catalyst bed of the above flue gas denitrification device will deteriorate after long-term use, or even become unusable. The catalyst bed needs to be replaced regularly, and tools are needed to remove the connecting bolts during disassembly. The replacement process is time-consuming and labor-intensive, and the replacement efficiency is low. Utility Model Content

[0005] The utility model aims to provide a biomass boiler flue gas denitrification device, aiming to solve the problem that the catalyst bed layer of the existing flue gas denitrification device needs to be replaced with tools to dismantle the connecting bolts, which is inconvenient to operate.

[0006] To achieve the above-mentioned purpose, the utility model provides a biomass boiler flue gas denitrification equipment, including an inlet pipe, an oxidation box, an oxidation layer frame, a fixing bolt and a treatment box; the inlet pipe is connected to the oxidation box and is located on one side of the oxidation box, the oxidation layer frame is arranged on one side of the oxidation box, the fixing bolt is slidably connected to the oxidation box, and is clamped with the oxidation layer frame, and is located on one side of the oxidation box, and the treatment box is connected to the oxidation box and is located on one side of the oxidation box.

[0007] Among them, the oxidation layer frame includes a sliding frame, an oxidation layer and a fixed pressure bolt. The sliding frame is slidably connected to the oxidation box and passes through the oxidation box. The oxidation layer is arranged on one side of the sliding frame. The fixed pressure bolt is threadedly connected to the sliding frame and passes through the oxidation layer.

[0008] Wherein, the fixing bolt includes a spring, a plug, a sliding block and a magnetic block, the spring is fixedly connected to the oxidation box and is located on one side of the oxidation box, the plug is fixedly connected to the spring and is located on one side of the spring, the sliding block is fixedly connected to the plug and passes through the oxidation box, and the magnetic block is fixedly connected to the oxidation box and is located on the side of the oxidation box close to the sliding block.

[0009] Wherein, the biomass boiler flue gas denitrification equipment also includes a cooling component, and the cooling component is arranged on one side of the inlet pipe.

[0010] Among them, the cooling component includes a heat exchange column, a cooling box and a refrigeration fin. The cooling box is arranged on the outside of the inlet pipe. The heat exchange column is fixedly connected to the inlet pipe and passes through the inlet pipe and the cooling box. The refrigeration fin is fixedly connected to the cooling box and passes through the cooling box.

[0011] The utility model discloses a biomass boiler flue gas denitrification device, wherein the inlet pipe is used to introduce the biomass boiler flue gas into the oxidation box, and the oxidation layer frame in the oxidation box performs oxidation-reduction, so that NO in the flue gas is oxidized into NO2, and the oxidation box then introduces the oxidized flue gas into the treatment box, and the water or alkaline solution in the treatment box absorbs NO2 to achieve flue gas denitrification. After the flue gas denitrification device has been used for a long time, the worker uses his hand to slide the fixing bolt to the side away from the oxidation layer frame to separate the fixing bolt from the oxidation layer frame. At this time, the oxidation layer frame is pulled out of the oxidation box for replacement. Compared with the traditional flue gas denitrification device that uses tools to disassemble the connecting bolts for replacement, the operation is more convenient and quick, and solves the problem that the catalyst bed layer of the existing flue gas denitrification device needs to be replaced by tools to disassemble the connecting bolts, which is inconvenient to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art are briefly introduced below.

[0013] Figure 1 It is a structural schematic diagram of a biomass boiler flue gas denitrification device according to the first embodiment of the utility model.

[0014] Figure 2 It is a longitudinal cross-sectional view of a biomass boiler flue gas denitrification device along the plug direction according to the first embodiment of the utility model.

[0015] Figure 3 It is a longitudinal cross-sectional view of a biomass boiler flue gas denitrification device along the plug direction according to the second embodiment of the utility model.

[0016] In the figure: 101-introduction pipe, 102-oxidation box, 103-treatment box, 104-sliding frame, 105-oxidation layer, 106-fixed pressure bolt, 107-spring, 108-plug, 109-sliding block, 110-magnetic block, 201-heat exchange column, 202-cooling box, 203-refrigeration plate. DETAILED DESCRIPTION

[0017] The first embodiment of the present application is:

[0018] See also Figure 1-Figure 2 , Figure 1 It is a structural schematic diagram of the utility model. Figure 2It is a longitudinal sectional view of the utility model along the plug direction. The biomass boiler flue gas denitrification equipment in this embodiment includes an inlet pipe 101, an oxidation box 102, an oxidation layer frame, a fixed bolt and a treatment box 103; the oxidation layer frame includes a sliding frame 104, an oxidation layer 105 and a fixed pressure bolt 106, and the fixed bolt includes a spring 107, a plug 108, a sliding block 109 and a magnetic block 110. The above-mentioned scheme solves the problem that the catalyst bed of the existing flue gas denitrification device needs to be replaced with the help of tools to remove the connecting bolts, which is inconvenient to operate. It can be understood that the above-mentioned scheme can be used in the scenario of flue gas denitrification treatment.

[0019] According to this specific embodiment, the introduction pipe 101 is connected to the oxidation box 102 and is located on one side of the oxidation box 102. The oxidation layer frame is arranged on one side of the oxidation box 102. The fixing bolt is slidably connected to the oxidation box 102 and is engaged with the oxidation layer frame and is located on one side of the oxidation box 102. The treatment box 103 is connected to the oxidation box 102 and is located on one side of the oxidation box 102. The introduction pipe 101 is used to introduce the flue gas of the biomass boiler into the oxidation box 102, and the oxidation-reduction is carried out by the oxidation layer frame in the oxidation box 102, so that NO in the flue gas is oxidized into NO2. The oxidation box 102 then guides the oxidized flue gas into the treatment box 103, and the water or alkaline solution in the treatment box 103 absorbs NO2 to achieve flue gas denitrification. After the flue gas denitrification equipment has been used for a long time, the worker uses his hand to slide the fixing bolt to the side away from the oxidation layer frame to separate the fixing bolt from the oxidation layer frame. At this time, the oxidation layer frame is pulled out of the oxidation box 102 for replacement. Compared with traditional flue gas denitrification equipment that requires the use of tools to disassemble the connecting bolts for replacement, the operation is more convenient and quick, and solves the problem that the catalyst bed of the existing flue gas denitrification device needs to be replaced with the help of tools to disassemble the connecting bolts, which is inconvenient to operate.

[0020] Among them, the sliding frame 104 is slidably connected to the oxidation box 102 and passes through the oxidation box 102. The oxidation layer 105 is arranged on one side of the sliding frame 104. The fixed pressure bolt 106 is threadedly connected to the sliding frame 104 and passes through the oxidation layer 105. The sliding frame 104 provides installation conditions for the oxidation layer 105. The oxidation layer 105 is used for oxidation-reduction of the flue gas introduced into the oxidation box 102 by the inlet pipe 101, and oxidizing the NO therein into NO2. The fixed pressure bolt 106 is used to fix the oxidation layer 105 on the sliding frame 104. When replacing the oxidation layer 105, the worker only needs to pull the sliding frame 104 out of the oxidation box 102 and remove the fixed pressure bolt 106 from the sliding frame 104 to take out the oxidation layer 105.

[0021] Secondly, the spring 107 is fixedly connected to the oxidation box 102 and is located on one side of the oxidation box 102. The plug 108 is fixedly connected to the spring 107 and is located on one side of the spring 107. The sliding block 109 is fixedly connected to the plug 108 and passes through the oxidation box 102. The magnetic block 110 is fixedly connected to the oxidation box 102 and is located on the side of the oxidation box 102 close to the sliding block 109. The plug 108 is firmly pressed against the oxidation box 102 by the reaction force of the spring 107. The sliding block 109 holds the card slot of the sliding frame 104, so as to fix the sliding frame 104 and the oxidation box 102. The setting of the sliding block 109 is convenient for the worker to slide the plug 108 and pull the plug 108 out of the sliding frame 104. The setting of the magnetic block 110 is used to absorb and fix the sliding frame 104 to prevent the spring 107 from resetting itself and pushing out the plug 108 when the worker pulls out the sliding frame 104, thereby affecting the pulling out of the sliding frame 104. The sliding block 109 is made of metal.

[0022] When the oxide layer 105 is replaced, the worker slides the sliding block 109 to the side away from the sliding frame 104 by hand, and the sliding block 109 slides to drive the plug 108 to slide and compress the spring 107, so as to separate the plug 108 from the sliding frame 104 until the sliding block 109 is adsorbed by the magnetic block 110. At this time, the worker uses his hand to pull the sliding frame 104 out of the oxidation box 102, and removes the fixed pressure bolt 106 and the oxide layer 105 from the sliding frame 104 in turn, thereby completing the disassembly of the oxide layer 105. The worker uses his hands to place the new oxide layer 105 on the sliding frame 104, and passes the fixing pressure bolt 106 through the oxide layer 105 to fix it to the sliding frame 104. Finally, the sliding frame 104 is placed in the oxidation box 102, and the sliding block 109 is pulled toward the side close to the sliding frame 104, so that the sliding block 109 is separated from the magnetic block 110. The spring 107 resets and pushes the plug 108 to reset and insert it into the sliding frame 104, and the sliding frame 104 is fixed and limited, thus completing the replacement of the oxide layer 105.

[0023] The second embodiment of the present application is:

[0024] Based on the first embodiment, please refer to Figure 3 , Figure 3 It is a longitudinal cross-sectional view of the utility model along the plugging direction. The biomass boiler flue gas denitrification equipment in this embodiment also includes a cooling component, and the cooling component includes a heat exchange column 201, a cooling box 202 and a refrigeration plate 203.

[0025] According to this specific embodiment, the cooling component is arranged on one side of the inlet pipe 101 , and the cooling component is arranged to cool the flue gas in the inlet pipe 101 to prevent the flue gas temperature from being too high, thereby affecting the service life of the oxidation layer 105 .

[0026] Among them, the cooling box 202 is arranged on the outside of the inlet pipe 101, the heat exchange column 201 is fixedly connected to the inlet pipe 101 and passes through the inlet pipe 101 and the cooling box 202, the refrigeration plate 203 is fixedly connected to the cooling box 202 and passes through the cooling box, the heat exchange column 201 is made of metal material, the cooling box 202 is filled with coolant, the refrigeration plate 203 is a common technology on the market, the cooling end is located on the inside of the cooling box 202, and the heat release end is located on the outside of the cooling box 202, the heat exchange column 201 absorbs the heat of the flue gas in the inlet pipe 101, and exchanges heat with the coolant in the cooling box 202 to achieve cooling of the flue gas, avoid excessively high flue gas temperature, and affect the service life of the oxidation layer 105, the setting of the refrigeration plate 203 is used to cool the coolant and ensure the cooling energy of the coolant.

[0027] When the cooling assembly is in use, the heat of the flue gas in the inlet pipe 101 is absorbed by the heat exchange column 201, and heat is exchanged with the coolant in the cooling box 202 to achieve cooling of the flue gas.

[0028] The above disclosure is only a preferred embodiment of a biomass boiler flue gas denitrification device of the present application, and cannot be used to limit the scope of rights of the present application. Ordinary technicians in this field can understand that all or part of the processes of the above embodiments and equivalent changes made according to the claims of the present application are still within the scope covered by the present application.

Claims

1. A biomass boiler flue gas denitrification equipment, characterized in that: It includes an introduction tube, an oxidation box, an oxidation layer rack, a fixing bolt and a treatment box; The inlet pipe is connected to the oxidation box and is located on one side of the oxidation box. The oxidation layer rack is arranged on one side of the oxidation box. The fixing bolt is slidably connected to the oxidation box and is clamped with the oxidation layer rack and is located on one side of the oxidation box. The processing box is connected to the oxidation box and is located on one side of the oxidation box.

2. A biomass boiler flue gas denitrification device as claimed in claim 1, characterized in that: The oxidation layer frame includes a sliding frame, an oxidation layer and a fixed pressure bolt. The sliding frame is slidably connected to the oxidation box and passes through the oxidation box. The oxidation layer is arranged on one side of the sliding frame. The fixed pressure bolt is threadedly connected to the sliding frame and passes through the oxidation layer.

3. A biomass boiler flue gas denitrification device as claimed in claim 2, characterized in that: The fixing bolt includes a spring, a plug, a sliding block and a magnetic block. The spring is fixedly connected to the oxidation box and is located on one side of the oxidation box. The plug is fixedly connected to the spring and is located on one side of the spring. The sliding block is fixedly connected to the plug and passes through the oxidation box. The magnetic block is fixedly connected to the oxidation box and is located on the side of the oxidation box close to the sliding block.

4. A biomass boiler flue gas denitrification device as claimed in claim 3, characterized in that: The biomass boiler flue gas denitrification equipment also includes a cooling component, which is arranged on one side of the inlet pipe.

5. A biomass boiler flue gas denitrification device as claimed in claim 4, characterized in that: The cooling assembly includes a heat exchange column, a cooling box and a refrigeration fin. The cooling box is arranged outside the inlet pipe. The heat exchange column is fixedly connected to the inlet pipe and passes through the inlet pipe and the cooling box. The refrigeration fin is fixedly connected to the cooling box and passes through the cooling box.

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