In-furnace efficient denitration device based on flow state reconstruction

Abstract

The utility model discloses an in-furnace efficient denitration device based on flow state reconstruction, and relates to the technical field of flue gas denitration, the in-furnace efficient denitration device comprises an outer shell I and an outer shell II, the outer shell II is internally provided with a flow guide grid and a group of catalyst layers, a protective shell is arranged below the outer shell I, the upper surface of the protective shell is provided with a clamping groove, and a filter plate is movably clamped in the clamping groove; flue gas is filtered through a set of connecting pipes before denitration operation, the flue gas is guided through a flow guide block, airflow is guided to enter the set of connecting pipes, activated carbon layers are arranged on the inner walls of the connecting pipes, the length of the flowing path of the airflow in the pipes is increased through the zigzag design of the connecting pipes, the direction of the airflow is continuously changed when the airflow flows in the pipes, and the denitration effect is improved. The retention time of airflow at the activated carbon layer is prolonged, the adsorption efficiency is improved, particulate matters in flue gas can be intercepted through adsorption filtration, high-speed scouring of the particulate matters to internal parts of the denitration device is avoided, mechanical wear is relieved, the equipment failure frequency is reduced, and the overall service life of the device is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of flue gas denitration, especially to a high -efficient denitration device in the furnace based on flow state reconstruction. BACKGROUND

[0002] The high -efficient denitration device in the furnace based on flow state reconstruction is the key equipment for reducing the nitrogen oxide emission of industrial boilers, power station boilers and other equipment, and is widely used in the fields of electric power, chemical industry, steel and many other industries by means of flow state reconstruction technology, optimizing the flow field in the furnace, making the denitration agent and flue gas fully mix and realizing high -efficient denitration.

[0003] 1, flow state adjusting mechanism: by installing spoiler, deflector and other elements, the flow direction and speed distribution of the airflow in the furnace are changed, and the flow field beneficial to the denitration reaction is formed.

[0004] 2, denitration agent injection mechanism: the denitration agent is accurately sprayed into the specific area in the furnace, and the commonly used spray gun can realize the atomization of the denitration agent, and increase the contact area with the flue gas.

[0005] 3, monitoring and control mechanism: the key parameters such as the temperature, nitrogen oxide concentration and airflow velocity in the furnace are monitored in real time, and the injection amount of the denitration agent and the state of the flow state adjusting element are automatically adjusted according to these data.

[0006] At present, in order to realize high -efficient denitration, various technologies and devices are adopted in the industry. Some enterprises use simple SNCR (selective non-catalytic reduction) denitration device, the equipment structure is simple, and the investment cost is low, some enterprises adopt SCR (selective catalytic reduction) denitration device, the denitration efficiency is higher, and some large enterprises use SNCR-SCR combined denitration system, which considers the cost and denitration effect.

[0007] However, the above-mentioned embodiments still have the following problems. In terms of flue gas impurity treatment, most denitration devices are not equipped with effective pre-filtering mechanism, and the impurities such as dust and heavy metals in the flue gas can easily cause the poisoning of the denitration catalyst, reduce the denitration efficiency, and also accelerate the wear of the internal parts of the equipment. In terms of equipment maintenance, most of the existing filtering mechanisms are difficult to disassemble, when the filter material needs to be cleaned or replaced, the operation is extremely inconvenient, not only a lot of time and manpower are consumed, but also the equipment is stopped for a long time, which affects the production progress. The present application provides a solution to these problems, and designs a high -efficient denitration device in the furnace based on flow state reconstruction which is provided with activated carbon filtering mechanism and filtering mechanism convenient to disassemble. The device effectively removes the impurities in the flue gas through the activated carbon filtering mechanism, protects the denitration equipment, improves the denitration efficiency, and at the same time, the filtering mechanism convenient to disassemble can reduce the difficulty of equipment maintenance, shorten the maintenance time and ensure the stable operation of the equipment. UTILITY MODEL CONTENTS

[0008] In view of the deficiencies of the prior art, the utility model provides a kind of based on flow state reconstruction furnace high efficiency denitration device, solve in flue gas impurity processing aspect, most denitration device is not equipped with effective prefilter mechanism, dust, heavy metal and other impurities in flue gas can easily lead to denitration catalyst poisoning, reduce denitration efficiency, it can also accelerate the wear and tear of equipment internal components Problem.

[0009] To achieve the above object, the utility model is realized by the following technical scheme:

[0010] A kind of based on flow state reconstruction furnace high efficiency denitration device, including shell one and shell two, the flow guide grid and a group of catalyst layer are arranged in the shell two, the protective shell is arranged below the shell one, the upper surface of the protective shell is equipped with clamping groove, the filter plate is movably connected in the clamping groove, a group of connecting pipes for filtering are arranged in the filter plate, two limit blocks are movably connected in the filter plate, the opposite surface of two limit blocks is fixedly connected with reset spring, the flow guide block and the flow guide plate are fixedly connected in the shell one.

[0011] Preferably: the front surface of the filter plate is equipped with rectangular groove, the rectangular groove is movably connected with two limit blocks, the connecting block is fixedly connected in the rectangular groove, and the connecting block is fixedly connected with two reset springs.

[0012] Preferably: the upper surface of two limit blocks is fixedly connected with push block, two limit slots are arranged in the inner wall of clamping groove, and two limit slots are movably connected with two limit blocks respectively.

[0013] Compared with prior art, the utility model has the following beneficial effects:

[0014] 1, flue gas is guided by flow guide block, and the airflow is guided into a group of connecting pipes, and the inner wall of connecting pipe is provided with activated carbon layer, and the connecting pipe of zigzag design increases the flow path length of airflow in pipe, so that the airflow changes direction constantly when flowing in pipe, so that the residence time of airflow at activated carbon layer is extended, the adsorption efficiency is improved, and the adsorption and filtration can intercept particulate matter in flue gas, avoid high-speed scouring of internal components of denitration device, reduce mechanical wear and tear, reduce equipment failure frequency, and prolong the overall service life of device.

[0015] 2, when the filter plate needs to be disassembled, two push blocks are pulled relatively to drive fixed limit block to move together, and two limit blocks are moved relatively to be separated from the clamping of two limit slots arranged in the protective shell, the limit is opened, and the filter plate can be disassembled at this time, the design is convenient to operate, convenient for cleaning treatment in later period, reduce maintenance time, so that device can be recovered faster. BRIEF DESCRIPTION OF DRAWINGS

[0016] The above description is only a summary of the technical scheme of the present application, in order to more clearly understand the technical means of the present application, and can be implemented according to the content of the specification, the following is the preferred embodiment of the present application and the detailed description of the drawings as follows.

[0017] Figure 1 It is the overall structure diagram of the present application;

[0018] Figure 2 It is the overall explosion structure diagram of the present application;

[0019] Figure 3 It is the protective shell structure diagram of the present application;

[0020] Figure 4 It is the filter plate structure diagram of the present application.

[0021] Legend: 1, shell one; 2, shell two; 3, protective shell; 4, flow guide grid; 5, catalyst layer; 6, flow guide plate; 7, clamping groove; 8, limiting groove; 9, filter plate; 10, flow guide block; 11, connecting block; 12, reset spring; 13, push block; 14, limiting block; 15, rectangular groove; 16, connecting pipe. DETAILED DESCRIPTION

[0022] The embodiment of the present application provides a kind of based on flow state reconstruction furnace high-efficiency denitration device, effectively solve in flue gas impurity processing, most denitration device is not equipped with effective pre-filter mechanism, dust, heavy metal and other impurities in flue gas can easily lead to denitration catalyst poisoning, reduce denitration efficiency, also can accelerate the wear and tear of equipment internal components Problem, design a kind of based on flow state reconstruction furnace high-efficiency denitration device with activated carbon filter mechanism and filter mechanism easy to disassemble, the device is removed by activated carbon filter mechanism, effectively remove the impurities in flue gas, protect denitration equipment, improve denitration efficiency, at the same time, filter mechanism easy to disassemble can reduce equipment maintenance difficulty, shorten maintenance time, guarantee equipment stable operation.

[0023] EMBODIMENT

[0024] As Figure 1 , Figure 2 , Figure 3 And Figure 4 The technical scheme in the embodiment of the present application effectively solves the technical problem that most denitration devices are not equipped with effective pre-filter mechanism in flue gas impurity processing, dust, heavy metal and other impurities in flue gas can easily lead to denitration catalyst poisoning, reduce denitration efficiency, also can accelerate the wear and tear of equipment internal components, the overall idea is as follows:

[0025] The utility model provides a kind of based on flow state reconstruction furnace high efficiency denitrification device, including shell one 1 and shell two 2, flow guide grid 4 and a group of catalyst layer 5 are provided in shell two 2, protective shell 3 is provided in shell one 1 lower, the upper surface of protective shell 3 is equipped with slot 7, filter plate 9 is movably connected in slot 7, a group of connecting pipes 16 for filtering are provided in filter plate 9, two limit blocks 14 are movably connected in filter plate 9, two limit blocks 14 opposite surface are all fixedly connected with reset spring 12, flow guide block 10 and flow guide plate 6 are fixedly connected in shell one 1, flue gas is discharged from boiler and other equipment, first after preliminary processing, using AIG ammonia injection technology, ammonia gas is sprayed into flue by ammonia injection grid, flow direction is guided by flow guide grid 4, mixed uniform flue gas and ammonia gas enter the area equipped with catalyst layer 5, after catalytic reaction, flue gas with greatly reduced nitrogen oxide concentration, continue to flow through subsequent equipment, such as air preheater, dust collector, induced draft fan etc., further processing reaches environmental protection emission standard, is discharged from chimney, flue gas is filtered by a group of connecting pipes 16 before denitrification operation, flue gas is guided by flow guide block 10, guide flow enters a group of connecting pipes 16, the inner wall of connecting pipe 16 is provided with activated carbon layer, the flow path length of air flow in pipe is increased by zigzag design connecting pipe 16, air flow changes direction constantly when flowing in pipe, so that air flow stays longer in activated carbon layer, improve adsorption efficiency, adsorption filtration can intercept particulate matter in flue gas, avoid high-speed scouring denitrification device internal components, reduce mechanical wear, reduce equipment failure frequency, prolong the overall service life of device.

[0026] Rectangular groove 15 is equipped on the front surface of filter plate 9, and the rectangular groove 15 is movably connected with the two limit blocks 14, and the connecting block 11 is fixedly connected in the rectangular groove 15, and the connecting block 11 is fixedly connected with the two reset springs 12, and the push block 13 is fixedly connected on the upper surface of the two limit blocks 14, and the two limit grooves 8 are formed in the inner wall of the slot 7, and the two limit grooves 8 are movably connected with the two limit blocks 14 respectively, when the filter plate 9 needs to be disassembled, the two push blocks 13 are pulled relatively to drive the fixed limit blocks 14 to move together, the relative movement of the two limit blocks 14 will be separated from the two limit grooves 8 formed in the protective shell 3, and the limit is opened, so that the filter plate 9 can be disassembled, and the design is convenient for operation, which facilitates the cleaning treatment in the later period, reduces the maintenance time, and makes the device can restore operation faster.

[0027] Among them, shell one 1: is a part of device, fixedly connected with flow guide block 10 and flow guide plate 6 in, provides structural support for device, and together with shell two 2 etc. constitutes the overall shell of denitrification device, so that internal components are orderly installed and work cooperatively;

[0028] Shell two 2: internally provided with flow guide grid 4 and a set of catalyst layer 5, and shell one 1 together constitute the device shell, for the denitration reaction to provide space, protect the internal components from the outside environment;

[0029] Protective shell 3: located below the shell one 1, the upper surface is provided with clamping groove 7 for clamping filter plate 9, which protects the filter plate 9 below from damage by external force, and ensures the normal play of the filtering function;

[0030] Flow guide grid 4: provided in shell two 2, guide the flow direction, make the flue gas entering shell two 2 and ammonia gas mix more evenly, create good airflow conditions for the subsequent denitration reaction in catalyst layer 5;

[0031] Catalyst layer 5: installed in shell two 2, in the denitration reaction, reduce the activation energy of the reaction, promote the selective catalytic reduction reaction between nitrogen oxides in flue gas and ammonia gas, convert nitrogen oxides into harmless substances, achieve the purpose of denitration;

[0032] Flow guide plate 6: fixed in shell one 1, auxiliary flow guide block 10 changes the flow direction of flue gas, so that the flue gas enters the connecting pipe 16 more smoothly for filtering, improving the efficiency of filtering and denitration process;

[0033] Clamping groove 7: provided on the upper surface of protective shell 3, and filter plate 9 is movably clamped, which plays a role in positioning and fixing filter plate 9, so that filter plate 9 is installed stably, ensuring its normal filtering of flue gas;

[0034] Limiting groove 8: located in the inner wall of clamping groove 7, and limiting block 14 is movably clamped, which limits the position of filter plate 9, prevents it from shifting during the operation of the device, and ensures the stable work of filter plate 9;

[0035] Filter plate 9: provided in clamping groove 7 of protective shell 3, and has connecting pipe 16 inside for filtering flue gas, and the detachable design facilitates later cleaning and maintenance, ensuring the stable operation of the denitration device;

[0036] Flow guide block 10: fixed in shell one 1, guides flue gas into connecting pipe 16, so that flue gas can fully contact with the activated carbon layer on the inner wall of connecting pipe 16, improving the filtering effect;

[0037] Connecting block 11: fixed in rectangular groove 15, connected with return spring 12, providing a fixed point for return spring 12, ensuring that limiting block 14 can work normally under the action of return spring 12;

[0038] Return spring 12: connecting limiting block 14 and connecting block 11, when filter plate 9 is installed, limiting block 14 can be automatically clamped into limiting groove 8, fixing filter plate 9; provide elastic force when disassembling;

[0039] Push block 13: fixed on the upper surface of the limiting block 14, convenient for the operator to pull the limiting block 14, realize the disassembly of the filter plate 9, make the maintenance operation more convenient;

[0040] Limiting block 14: active clamping in the filter plate 9, cooperating with the limiting groove 8, fixing the filter plate 9, under the action of the push block 13, can be separated from the limiting groove 8, convenient for disassembly of the filter plate 9;

[0041] Rectangular groove 15: set in the front surface of the filter plate 9, used for installing the limiting block 14 and the connecting block 11, providing installation space for related components, ensuring the normal use and disassembly of the filter plate 9;

[0042] Connecting pipe 16: set in the filter plate 9, with activated carbon layer on the inner wall, prolonging the residence time of airflow through zigzag design, adsorbing particulate matter in flue gas, protecting the internal components of the denitration device.

[0043] Working principle:

[0044] The flue gas discharged from the boiler and other equipment is first subjected to preliminary treatment, using AIG ammonia injection technology, ammonia gas is sprayed into the flue through the ammonia injection grid, the airflow is guided by the flow guide grid 4, the uniformly mixed flue gas and ammonia gas enter the area with catalyst layer 5, after catalytic reaction, the flue gas with greatly reduced nitrogen oxide concentration continues to flow through subsequent equipment such as air preheater, dust collector, induced draft fan, etc., and is further treated to meet the environmental protection emission standard, and is discharged from the chimney. Before denitration operation, the flue gas will be filtered through a set of connecting pipes 16, the flue gas is guided by the flow guide block 10 into a set of connecting pipes 16, the inner wall of the connecting pipe 16 is provided with an activated carbon layer, the zigzag design of the connecting pipe 16 increases the flow path length of the airflow in the pipe, the airflow changes direction constantly when flowing in the pipe, the residence time of the airflow in the activated carbon layer is prolonged, the adsorption efficiency is improved, the adsorption and filtration can intercept particulate matter in the flue gas, avoid high-speed scouring of the internal components of the denitration device, reduce mechanical wear and tear, reduce equipment failure frequency, prolong the overall service life of the device. When the filter plate 9 needs to be disassembled, the two push blocks 13 are pulled relatively to drive the fixed limiting block 14 to move together, the relative movement of the two limiting blocks 14 will separate the clamping with the two limiting grooves 8 opened in the protective shell 3, the limiting is opened, at this time the filter plate 9 can be disassembled, the design of convenient operation facilitates the later cleaning treatment, reduces the maintenance time, and makes the device can recover operation faster.

[0045] Finally, it should be noted that: apparently, the above embodiments are merely examples for clearly illustrating the utility model, and are not limited to the implementation. For ordinary skilled persons in the art, other different forms of changes or variations can be made on the basis of the above description. Here, it is not necessary and impossible to exhaust all the implementation. The obvious changes or variations derived therefrom are still within the protection scope of the utility model.

Claims

1. A high-efficiency denitration device based on flow-state reconstruction in a furnace, comprising a shell one (1) and a shell two (2), characterized in that, The outer shell two (2) is provided with a flow guide grid (4) and a group of catalyst layers (5), the outer shell one (1) is provided with a protective shell (3) below, the upper surface of the protective shell (3) is provided with a clamping groove (7), the clamping groove (7) is movably connected with a filter plate (9). Wherein, the filter plate (9) is provided with a group of connecting pipes (16) for filtering, the filter plate (9) is movably connected with two limiting blocks (14), the opposite surfaces of the two limiting blocks (14) are fixedly connected with return springs (12).

2. The high-efficiency denitration device based on flow state reconstruction in a furnace according to claim 1, characterized in that: The outer shell one (1) is fixedly connected with a flow guide block (10) and a flow guide plate (6).

3. The high-efficiency denitration device based on flow state reconstruction in a furnace according to claim 1, characterized in that: The front surface of the filter plate (9) is provided with a rectangular groove (15); Wherein, the rectangular groove (15) is movably connected with two limiting blocks (14).

4. The high-efficiency denitration device based on flow state reconstruction in a furnace according to claim 3, characterized in that: The rectangular groove (15) is fixedly connected with a connecting block (11); Wherein, the connecting block (11) is fixedly connected with two return springs (12).

5. The high-efficiency denitration device based on flow state reconstruction in a furnace according to claim 1, characterized in that: The upper surfaces of the two limiting blocks (14) are fixedly connected with push blocks (13).

6. The high-efficiency denitration device based on flow state reconstruction in a furnace according to claim 1, characterized in that: The inner wall of the clamping groove (7) is provided with two limiting grooves (8); Wherein, the two limiting grooves (8) are movably connected with two limiting blocks (14) respectively.

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