A multi-stage catalytic combustion system for waste gas

Abstract

The utility model relates to a multi-stage catalytic combustion system for waste gas, including a combustion chamber, in which a heater and a catalytic filler plate are installed; and also includes a pretreatment chamber and a preheating chamber, wherein the pretreatment chamber is located directly below the preheating chamber, and the preheating chamber is located on the left side of the combustion chamber. In the utility model, the waste gas is mixed with air and preheated in the preheating chamber, and then flows to the combustion chamber on the right side through a heating channel composed of a plurality of partitions, so that the preheating of the waste gas is relatively complete, and the combustion catalytic effect in the combustion chamber is improved in the later stage.

Description

Technical Field

[0001] The utility model relates to the technical field related to waste gas treatment, and in particular to a waste gas multi-stage catalytic combustion system. Background Art

[0002] Catalytic combustion device refers to a device or equipment that burns under the action of a catalyst. The working principle of the catalytic combustion device is: with the help of a catalyst, the organic waste gas is flamelessly burned at a lower ignition temperature, and the organic waste gas is decomposed into non-toxic carbon dioxide and water vapor.

[0003] After massive searches, it was found that the prior art publication number is CN214094537U, which discloses a catalytic combustion industrial waste gas treatment equipment; it can fully mix the waste gas and air, improve the reaction rate of the two on the catalytic combustion bed, and the waste gas treatment effect is better; it includes a catalytic burner body, a catalytic combustion chamber is arranged in the catalytic burner body, a catalytic combustion bed is arranged in the catalytic combustion chamber, an exhaust gas inlet pipe and an air inlet pipe connected to the catalytic combustion chamber are arranged on the upper part of the catalytic burner body, and an exhaust pipe connected to the catalytic burner body is arranged on the lower part of the catalytic burner body; it also includes a rotating mechanical sealing connector, a straight pipe, an air distribution pipe rack and a wind wheel, the catalytic burner body is cylindrical, a mounting plate is arranged at the bottom of the catalytic combustion chamber, a connecting hole penetrating from top to bottom is arranged in the middle of the mounting plate, the catalytic combustion bed is fixedly installed on the mounting plate, the catalytic combustion bed is cylindrical, and a plurality of groups of evenly distributed air distribution pipes are arranged on the air distribution pipe rack.

[0004] In summary, in the process of treating exhaust gas, the existing catalytic combustion equipment has a relatively simple channel structure for the combustion gas to flow through, which makes the gas flow faster, resulting in incomplete exhaust gas preheating and catalytic treatment, and resulting in a relatively general combustion catalytic effect.

[0005] In view of the above-mentioned defects, the designers have actively carried out research and innovation in order to create a multi-stage catalytic combustion system for exhaust gas to make it more valuable for industrial use. Utility Model Content

[0006] In order to solve any of the above technical problems, the purpose of the utility model is to provide a multi-stage catalytic combustion system for exhaust gas.

[0007] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0008] An exhaust gas multi-stage catalytic combustion system includes a combustion chamber in which a heater and a catalytic filler plate are installed;

[0009] It also includes a pretreatment chamber and a preheating chamber, wherein the pretreatment chamber is located directly below the preheating chamber and the preheating chamber is located on the left side of the combustion chamber;

[0010] An exhaust gas intake pipe is arranged on one side of the bottom of the pretreatment chamber, a desulfurization and denitrification packing layer is installed near the top of the pretreatment chamber, and the pretreatment chamber is connected to the bottom of the preheating chamber above through an exhaust pipe and a first air pump;

[0011] A number of staggered partitions are installed in the preheating chamber along the vertical direction, and a heating channel distributed along the serpentine structure is formed between the partitions. A heating resistance wire is laid on the heating channel. An air intake duct installed on the outside of the preheating chamber near the bottom left is connected to the preheating chamber through a first air pump, and the top right side of the combustion chamber is connected to the combustion chamber on the right through a combustion ventilation duct.

[0012] As a further improvement of the utility model, an air storage chamber is arranged at the lower right side of the combustion chamber. The bottom right side of the combustion chamber is connected to the air storage chamber below through an air storage pipe and a second air pump, and one side of the bottom of the air storage chamber is connected to the outside through an exhaust pipe and a second air pump.

[0013] As a further improvement of the utility model, a liquid inlet pipe is installed in the pretreatment chamber just above the desulfurization and denitrification packing layer, a plurality of liquid outlet nozzles are evenly distributed at the bottom of the liquid inlet pipe, and a liquid pump connected to an external liquid source is installed at one end of the liquid inlet pipe located outside the pretreatment chamber.

[0014] As a further improvement of the utility model, a dryer is installed on the air extraction pipeline.

[0015] As a further improvement of the utility model, a filter is installed on the air intake duct.

[0016] As a further improvement of the utility model, the filter is an activated carbon filter.

[0017] As a further improvement of the utility model, a sewage outlet is installed at the bottom of the combustion chamber.

[0018] As a further improvement of the utility model, the heater is a heating rod.

[0019] As a further improvement of the present invention, a plurality of heating rods are distributed in the combustion chamber in a horizontal direction and in a staggered manner.

[0020] By means of the above scheme, the utility model has at least the following advantages:

[0021] The utility model mixes the exhaust gas with the air in the preheating chamber and performs preheating treatment, and then flows to the combustion chamber on the right through the heating channel composed of a plurality of partitions, so that the exhaust gas is preheated more completely and the combustion catalytic effect in the combustion chamber is improved in the later stage.

[0022] The waste gas of the utility model is firstly subjected to desulfurization and denitrification treatment in a pretreatment chamber, then enters a preheating chamber for preheating, then undergoes catalytic combustion treatment in a combustion chamber, and finally is stored in a gas storage chamber for unified discharge, with good comprehensive treatment performance.

[0023] The above description is only an overview of the technical solution of the utility model. In order to more clearly understand the technical means of the utility model and implement it according to the contents of the specification, the following is a detailed description of the preferred embodiments of the utility model in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0025] Figure 1 It is a structural schematic diagram of a multi-stage catalytic combustion system for exhaust gas of the utility model;

[0026] Figure 2 yes Figure 1 The structural diagram of the pretreatment chamber;

[0027] Figure 3 yes Figure 1 Structural diagram of the middle preheating chamber;

[0028] Figure 4 yes Figure 1 Schematic diagram of the structure of the combustion chamber;

[0029] Figure 5 yes Figure 1 Schematic diagram of the structure of the middle gas storage chamber.

[0030] The meanings of the various reference numerals in the figures are as follows.

[0031] Pretreatment chamber 1, preheating chamber 2, combustion chamber 3, gas storage chamber 4;

[0032] Exhaust gas inlet pipeline 11, desulfurization and denitrification packing layer 12, liquid inlet pipeline 13, liquid pump 14, liquid outlet nozzle 15;

[0033] Air extraction pipeline 21, dryer 22, first air pump 23, air intake pipeline 24, filter 25, partition 26, heating channel 27, heating resistance wire 28, combustion ventilation pipeline 29;

[0034] Heater 31, catalytic filler plate 32, sewage outlet 33;

[0035] Gas storage pipeline 41 , second air pump 42 , and exhaust pipeline 43 . DETAILED DESCRIPTION

[0036] The following is a further detailed description of the specific implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0037] In order to make the technical personnel in the technical field better understand the scheme of the utility model, the technical scheme in the embodiment of the utility model will be clearly and completely described below in combination with the drawings in the embodiment of the utility model. Obviously, the described embodiment is only a part of the embodiment of the utility model, rather than all the embodiments. The components of the embodiment of the utility model usually described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiment of the utility model provided in the drawings is not intended to limit the scope of the utility model for protection, but only represents the selected embodiment of the utility model. Based on the embodiment of the utility model, all other embodiments obtained by those skilled in the art without making creative work belong to the scope of protection of the utility model.

[0038] Example

[0039] like Figure 1 to Figure 5 As shown,

[0040] A multi-stage catalytic combustion system for exhaust gas comprises a pretreatment chamber 1, a preheating chamber 2, a combustion chamber 3 and a gas storage chamber 4 in sequence. The pretreatment chamber 1 is located directly below the preheating chamber 2, and the preheating chamber 2 is located on the left side of the combustion chamber 3.

[0041] 1. An exhaust gas intake pipe 11 is provided on one side of the bottom of the pretreatment chamber 1, and a desulfurization and denitrification packing layer 12 is installed near the top of the pretreatment chamber 1. The pretreatment chamber 1 is connected to the bottom of the preheating chamber 2 above through an exhaust pipe 21 and a first air pump 23, and a dryer 22 is installed on the exhaust pipe 21.

[0042] A liquid inlet pipe 13 is installed in the pretreatment chamber 1 just above the desulfurization and denitrification packing layer 12, a plurality of liquid outlet nozzles 15 are evenly distributed at the bottom of the liquid inlet pipe 13, and a liquid pump 14 connected to an external liquid source is installed at one end of the liquid inlet pipe 13 located outside the pretreatment chamber 1.

[0043] 2. Several staggered partitions 26 are installed in the preheating chamber 2 along the vertical direction, and a heating channel 27 distributed along the serpentine structure is formed between the several partitions 26. A heating resistance wire 28 is laid on the heating channel 27. The air intake pipe 24 installed outside the preheating chamber 2 near the bottom left side is connected to the preheating chamber 2 through the first air pump 23. A filter 25 is installed on the air intake pipe 24, and the filter 25 is an activated carbon filter. The top right side of the combustion chamber 3 is connected to the combustion chamber 3 on the right side through the combustion ventilation pipe 29.

[0044] 3. A heater 31 and a catalytic filler plate 32 are installed in the combustion chamber 3, and a sewage outlet 33 is installed at the bottom of the combustion chamber 3. The heater 31 is a heating rod, and a plurality of heating rods are distributed in the combustion chamber 3 in a horizontal direction and staggered.

[0045] 4. An air storage chamber 4 is provided at the lower right side of the combustion chamber 3. The right bottom of the combustion chamber 3 is connected to the air storage chamber 4 below through an air storage pipe 41 and a second air pump 42. The bottom side of the air storage chamber 4 is connected to the outside through an exhaust pipe 43 and a second air pump 42.

[0046] The working principle of this utility model is briefly described as follows:

[0047] The exhaust gas initially enters the pretreatment chamber 1 through the exhaust gas intake pipe 11. At this time, the external liquid source is sprayed onto the desulfurization and denitrification packing layer 12 below through a plurality of liquid outlet nozzles 15 through a liquid pump 14 and a liquid intake pipe 13, so that the exhaust gas contacts the desulfurization and denitrification packing layer 12 and performs gas-liquid exchange to remove ammonia and sulfide in the exhaust gas; then the gas is dried through an exhaust pipe 21, a dryer 22 and a first air pump 23 and discharged into the upper preheating chamber 2. The external air is filtered through a filter 25 and enters the preheating chamber 2 to mix with the exhaust gas and preheat the exhaust gas. The exhaust gas flows in a heating channel 27 composed of a plurality of partitions 26 and is heated by a heating resistor 28, and finally discharged to the combustion chamber 3 on the right through a combustion ventilation pipe 29 for catalytic combustion. The waste gas after catalytic combustion treatment can be stored in the lower air storage chamber 4 through the air storage pipe 41 and the second air pump 42, and discharged regularly through the exhaust pipe 43 and the second air pump 42.

[0048] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implying the number of technical features indicated. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0049] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection, it can be a mechanical connection, it can be an electrical connection, it can be a direct connection, it can be an indirect connection through an intermediate medium, and it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0050] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. It should be pointed out that a person skilled in the art can make several improvements and modifications without departing from the technical principle of the present invention, and these improvements and modifications should also be regarded as within the protection scope of the present invention.

Claims

1. A multi-stage catalytic combustion system for exhaust gas, comprising a combustion chamber (3), wherein a heater (31) and a catalytic filler plate (32) are installed in the combustion chamber (3); Features: It also comprises a pretreatment chamber (1) and a preheating chamber (2), wherein the pretreatment chamber (1) is located directly below the preheating chamber (2), and the preheating chamber (2) is located on the left side of the combustion chamber (3); An exhaust gas intake pipe (11) is arranged on one side of the bottom of the pretreatment chamber (1), a desulfurization and denitrification packing layer (12) is installed near the top of the pretreatment chamber (1), and the pretreatment chamber (1) is connected to the bottom of the preheating chamber (2) above via an exhaust pipe (21) and a first air pump (23); A plurality of partitions (26) are installed in a vertical direction and are staggered in distribution. A heating channel (27) distributed along a serpentine structure is formed between the plurality of partitions (26). A heating resistance wire (28) is laid on the heating channel (27). An air intake pipe (24) installed outside the preheating chamber (2) near the bottom left side is connected to the preheating chamber (2) through a first air pump (23). The top right side of the combustion chamber (3) is connected to the combustion chamber (3) on the right side through a combustion ventilation pipe (29).

2. The exhaust gas multi-stage catalytic combustion system according to claim 1, characterized in that: An air storage chamber (4) is arranged below the right side of the combustion chamber (3); the bottom of the right side of the combustion chamber (3) is connected to the air storage chamber (4) below via an air storage pipe (41) and a second air pump (42); and one side of the bottom of the air storage chamber (4) is connected to the outside via an exhaust pipe (43) and the second air pump (42).

3. The exhaust gas multi-stage catalytic combustion system according to claim 1, characterized in that: A liquid inlet pipe (13) is installed in the pretreatment chamber (1) directly above the desulfurization and denitrification packing layer (12), a plurality of liquid outlet nozzles (15) are evenly distributed at the bottom of the liquid inlet pipe (13), and a liquid pump (14) connected to an external liquid source is installed at one end of the liquid inlet pipe (13) located outside the pretreatment chamber (1).

4. The exhaust gas multi-stage catalytic combustion system according to claim 1, characterized in that: A dryer (22) is installed on the air extraction pipeline (21).

5. The exhaust gas multi-stage catalytic combustion system according to claim 1, characterized in that: A filter (25) is installed on the air intake duct (24).

6. The exhaust gas multi-stage catalytic combustion system according to claim 5, characterized in that: The filter (25) is an activated carbon filter.

7. The exhaust gas multi-stage catalytic combustion system according to claim 1, characterized in that: A sewage outlet (33) is installed at the bottom of the combustion chamber (3).

8. The exhaust gas multi-stage catalytic combustion system according to claim 1, characterized in that: The heater (31) is a heating rod.

9. The exhaust gas multi-stage catalytic combustion system according to claim 8, characterized in that: A plurality of the heating rods are distributed in the combustion chamber (3) in a staggered manner along a horizontal direction.

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