Acid-gas-resistant heat accumulating type thermal incineration device

Abstract

The utility model relates to the technical field of heat accumulating type thermal incineration devices, in particular to an acid-resistant gas heat accumulating type thermal incineration device which comprises a thermal oxidation chamber, a plurality of heat accumulating chambers, a waste gas inlet pipeline, a purging inlet pipeline and a purified gas outlet pipeline. The plurality of heat storage chambers are respectively communicated with the thermal oxidation chamber; the heat storage chamber is provided with a heat storage body and an adsorption filler layer; and the waste gas inlet pipeline, the purging inlet pipeline and the purified gas outlet pipeline are respectively communicated with the second end of the heat storage chamber. A gas filtering link is added in the process that waste gas is purified by the thermal incineration device through the adsorption filler layer, a chemical filter material adsorbent is arranged in the adsorption filler layer, acid gas in the gas thermally oxidized by the thermal oxidation chamber can chemically react with the adsorbent in the adsorption filler layer, and the acid gas is removed and becomes harmless gas, so that the waste gas is purified by the adsorption filler layer. Purified gas is not corrosive, and downstream equipment parts of the adsorption filler layer can be made of carbon steel, so that the initial investment and the operation and maintenance cost are effectively reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of heat storage type thermal incineration devices, in particular to an acid gas resistant heat storage type thermal incineration device. Background Art

[0002] With the continuous advancement of science and technology and the continuous updating and iteration of the manufacturing industry, the types of pollutants are constantly increasing, and the environmental protection industry is facing arduous challenges. RTO (Regenerative Thermal Oxidizer) occupies a very important position in the environmental protection industry. It is an efficient air purification equipment that can treat various harmful waste gases, such as volatile organic compounds (VOCs), etc. It is widely used in petrochemical, pharmaceutical, coating, chemical fiber, metal products, food and other industries. RTO achieves the purpose of harmless treatment by decomposing the waste gas through high-temperature oxidation to achieve complete combustion of harmful substances. At the same time, RTO equipment can also recover heat, reduce energy consumption, and make the entire treatment process more economical and efficient.

[0003] However, in the process of using RTO to incinerate acid waste gas, since the main components of acid waste gas are halogen elements such as sulfide, nitrogen oxide, and chloride, these gases are not corrosive before entering RTO. After entering RTO, they are oxidized into acidic gas components such as hydrogen chloride at high temperature. After cooling by the heat storage body, they are fused with water vapor to form acid liquid. Acidic liquid has a strong corrosive effect on carbon steel materials, especially hydrogen chloride is also very corrosive to 316L stainless steel. Therefore, when the conventional design of RTO is used for acid waste gas incineration, the part in contact with process gas is often made of 2205 stainless steel to resist corrosion by acidic substances. 2205 stainless steel is a duplex stainless steel with excellent strength and corrosion resistance, but at the same time, its price is several times higher than that of carbon steel. In addition, the welding construction difficulty of this material in the production and processing link is higher than that of conventional carbon steel, and it also has higher requirements on the technical level of workers, resulting in a sharp increase in the manufacturing and material costs of RTO. Utility Model Content

[0004] The utility model provides an acid gas resistant heat storage type thermal incineration device, which is used to solve the defect that the existing RTO uses 2205 stainless steel to meet the acid waste gas incineration treatment, resulting in a sharp increase in RTO manufacturing and material costs, and enables RTO parts to be made of conventional carbon steel, greatly reducing equipment costs.

[0005] The utility model provides an acid-resistant gas heat storage type thermal incineration device, comprising:

[0006] a thermal oxidation chamber for thermally oxidizing the exhaust gas;

[0007] A plurality of heat storage chambers, wherein the first ends of the plurality of heat storage chambers are respectively connected to the thermal oxidation chamber; a heat storage body and an adsorption filler layer are arranged in the heat storage chamber;

[0008] An exhaust gas inlet pipeline, wherein the exhaust gas inlet pipeline is connected to the second ends of the plurality of heat storage chambers respectively;

[0009] a purge inlet pipeline, the purge inlet pipeline being connected to the second ends of the plurality of heat storage chambers respectively;

[0010] A purified gas outlet pipeline is connected to the second ends of the plurality of heat storage chambers respectively.

[0011] According to an acid gas resistant heat storage thermal incineration device provided by the utility model, the thermal oxidation chamber is connected to the top end of the heat storage chamber, the exhaust gas inlet pipeline, the purge inlet pipeline and the purified gas outlet pipeline are all connected to the bottom end of the heat storage chamber; the adsorption filler layer is located below the heat storage body.

[0012] According to an acid gas resistant heat storage thermal incineration device provided by the utility model, a first steel grid and a second steel grid covering the cross section of the heat storage chamber are arranged in the heat storage chamber, the first steel grid is located above the second steel grid, the heat storage body is installed on the first steel grid, and the adsorption filler layer is installed on the second steel grid.

[0013] According to the acid gas resistant heat storage thermal incineration device provided by the utility model, a plurality of I-beam brackets are arranged in the heat storage chamber, and the first steel grid and the second steel grid are respectively fixed in the heat storage chamber through the I-beam brackets.

[0014] According to an acid-resistant gas regenerative thermal incineration device provided by the utility model, valve components are provided in the pipelines connecting the waste gas inlet pipeline, the purge inlet pipeline and the purified gas outlet pipeline to the regenerative chamber, so that the waste gas inlet pipeline, the purge inlet pipeline and the purified gas outlet pipeline can be connected to different regenerative chambers by opening and closing different valve components.

[0015] According to the acid gas resistant heat storage type thermal incineration device provided by the utility model, the acid gas resistant heat storage type thermal incineration device also includes a valve component control device, and the valve component control device is used to control the opening and closing of different valve components.

[0016] According to the acid gas resistant heat storage type thermal incineration device provided by the utility model, the adsorption filler layer contains chemical fillers for adsorbing acid gases.

[0017] According to an acid gas resistant regenerative thermal incineration device provided by the utility model, a plurality of regenerative chambers are arranged side by side, furnace wall plates are provided on the outer walls of the two outermost regenerative chambers and the outer wall of the thermal oxidation chamber, and the end faces of the furnace wall plates of the thermal oxidation chambers are welded to the end faces of the furnace wall plates of the regenerative chambers to form a connection between the thermal oxidation chambers and the regenerative chambers.

[0018] According to the acid gas resistant regenerative thermal incineration device provided by the utility model, reinforcing ribs are arranged on the furnace wall plates of the thermal oxidation chamber and the regenerative chamber.

[0019] According to the acid gas resistant heat storage type thermal incineration device provided by the utility model, the inner walls of the thermal oxidation chamber and the heat storage chamber are both provided with a heat insulation layer.

[0020] The utility model provides an acid gas resistant heat storage type thermal incineration device. By setting an adsorption filler layer, the waste gas is filtered during the incineration purification process of the thermal incineration device. A chemical filter material adsorbent is set in the adsorption filler layer. The gas that has completed thermal oxidation in the thermal oxidation chamber is heat exchanged through the heat storage body. The heat storage body heats up and the gas is cooled. The gas after cooling enters the adsorption filler layer. The acid gas therein will react chemically with the adsorbent in the adsorption filler layer under specific conditions. When the gas molecules contact the surface of the adsorbent, the electron exchange or transfer of the chemical bond between molecules is realized to adsorb and transform the gas molecules. This transformation usually transforms the target gas molecules into other harmless or easy-to-handle substances. The acid gas in the gas passing through the adsorption filler layer is removed and becomes harmless gas. The gas after purification is non-corrosive. For the downstream equipment parts of the adsorption filler layer, such as the downstream flue, air valve, fan and exhaust pipe, carbon steel can be used instead of the high-cost 2205 stainless steel, which effectively reduces the initial investment and operation and maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the present invention or the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0022] Figure 1 It is a structural schematic diagram of the acid gas resistant heat storage type thermal incineration device provided by the utility model;

[0023] Figure 2 The utility model is a schematic diagram of the working principle of the acid gas resistant heat storage type thermal incineration device provided by the utility model.

[0024] Reference numerals:

[0025] 1. Thermal oxidation chamber; 2. Heat storage chamber; 21. Heat storage body; 22. Adsorption filler layer; 23. First steel grid; 24. Second steel grid; 3. Waste gas inlet pipeline; 4. Purge inlet pipeline; 5. Purified gas outlet pipeline; 6. Valve parts; 7. Valve assembly control device; 8. Reinforcement ribs; 9. Insulation layer. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be clearly and completely described below in conjunction with the drawings in the utility model. Obviously, the described embodiments are 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.

[0027] In the description of the embodiments of the present utility model, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "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 embodiments of 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 limiting the embodiments of the present utility model. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0028] In the description of the embodiments of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" 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 directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present utility model can be understood in specific circumstances.

[0029] In the embodiments of the present invention, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0030] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model embodiment. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0031] Combine the following Figure 1 and Figure 2 The structure and working principle of the acid gas resistant heat storage type thermal incineration device of the utility model are described.

[0032] One embodiment of the utility model provides an acid gas resistant heat storage type thermal incineration device, see Figure 1 As shown, it includes a thermal oxidation chamber 1, multiple heat storage chambers 2, an exhaust gas inlet pipeline 3, a purge inlet pipeline 4 and a purified gas outlet pipeline 5, wherein the thermal oxidation chamber 1 is used to thermally oxidize the exhaust gas; the first ends of the multiple heat storage chambers 2 are respectively connected to the thermal oxidation chamber 1; a heat storage body 21 and an adsorption filler layer 22 are arranged in the heat storage chamber 2; the exhaust gas inlet pipeline 3 is respectively connected to the second ends of the multiple heat storage chambers 2; the purge inlet pipeline 4 is respectively connected to the second ends of the multiple heat storage chambers 2; the purified gas outlet pipeline 5 is respectively connected to the second ends of the multiple heat storage chambers 2.

[0033] It can be understood that the acid gas resistant heat storage type thermal incineration device in this embodiment, through the setting of the adsorption filler layer 22, adds a gas filtration link in the process of incineration and purification of the waste gas through the thermal incineration device. A chemical filter material adsorbent is set in the adsorption filler layer 22, and the gas that completes the thermal oxidation in the thermal oxidation chamber 1 is heat exchanged through the heat storage body 21. The heat storage body 21 stores heat and heats up, while the gas is cooled. The cooled gas enters the adsorption filler layer 22, and the acid gas therein reacts chemically with the adsorbent in the adsorption filler layer 22 under specific conditions. When the gas molecules contact the surface of the adsorbent, the electron exchange or transfer of the chemical bonds between the molecules is realized to achieve the adsorption and conversion of the gas molecules, and this conversion usually converts the target gas molecules into other harmless or easy-to-handle substances. The acidic gas in the gas passing through the adsorption packing layer 22 is removed and becomes harmless gas. The purified gas is non-corrosive. The downstream equipment parts of the adsorption packing layer 22, such as the downstream flue, air valve, fan and exhaust pipe, etc., can be made of carbon steel instead of the more expensive 2205 stainless steel, which effectively reduces the initial investment and operation and maintenance costs.

[0034] In some specific examples of the acid gas resistant heat storage type thermal incineration device of the utility model, see again Figure 1 As shown, the thermal oxidation chamber 1 is connected to the top of the regenerator 2, and the exhaust gas inlet pipeline 3, the purge inlet pipeline 4 and the purified gas outlet pipeline 5 are all connected to the bottom of the regenerator 2; the adsorption filler layer 22 is located below the regenerator 21. The regenerator 2 is provided with a first steel grid 23 and a second steel grid 24 covering the cross section of the regenerator 2, the first steel grid 23 is located above the second steel grid 24, and a plurality of I-beam brackets are provided in the regenerator 2, and the first steel grid 23 and the second steel grid 24 are respectively fixed in the regenerator 2 through the I-beam brackets; the regenerator 21 is installed on the first steel grid 23, and the adsorption filler layer 22 is installed on the second steel grid 24.

[0035] It should be understood that the structure of the acid gas resistant thermal storage incineration device of this embodiment can be applied to the RTO structure of two-chamber, three-chamber or multi-chamber thermal storage chambers, such as Figure 1The three-chamber structure in the embodiment of the present invention can refer to the specific working process described later. After the exhaust gas enters the RTO from the exhaust gas inlet pipeline 3, it first passes through the adsorption filler layer 22 and the heat storage body 21 in one of the heat storage chambers 2. In the process of passing through the heat storage chamber 2, part of the acid gas is adsorbed by the adsorption filler layer 22 on the second steel grid 24, and then preheated by the heat storage body 21 on the first steel grid 23, and then enters the thermal oxidation chamber 1 for thermal oxidation. The gas product after thermal oxidation enters another heat storage chamber 2, first passes through the heat storage body 21 on the first steel grid 23 of the heat storage chamber 2 for cooling treatment, and then passes through the adsorption filler layer 22 on the second steel grid 24 of the heat storage chamber 2 to remove the acid gas from the gas product after thermal oxidation, and finally is discharged through the purified gas outlet pipeline 5. The discharged purified gas is the thermal oxidation gas product with the acid gas removed.

[0036] In some other specific examples of the acid gas resistant heat storage type thermal incineration device of the utility model, see Figure 2 As shown, the pipelines connecting the waste gas inlet pipeline 3, the purge inlet pipeline 4 and the purified gas outlet pipeline 5 to the heat storage chamber 2 are all provided with valve components 6, so that the waste gas inlet pipeline 3, the purge inlet pipeline 4 and the purified gas outlet pipeline 5 are connected to different heat storage chambers 2 by opening and closing different valve components 6. The acid-resistant gas regenerative thermal incineration device also includes a valve assembly control device 7, which is used to control different valve components 6 to open and close.

[0037] See also Figure 2The three-chamber RTO structure is controlled by the valve assembly control device 7 to open the valve member 6 in the pipeline of the exhaust gas inlet pipeline 3 connected to the leftmost heat storage chamber 2, and to close the valve members 6 in the pipelines connected to the other heat storage chambers 2; at the same time, the valve assembly control device 7 controls the valve member 6 in the pipeline of the purified gas outlet pipeline 5 connected to the middle heat storage chamber 2 to open, and to close the valve members 6 in the pipelines connected to the other heat storage chambers 2; the exhaust gas enters the left heat storage chamber 2 from the exhaust gas inlet pipeline 3, adsorbs part of the acidic gas through the adsorption filler layer 22 and is preheated by the heat storage body 21, and the preheated gas enters the thermal oxidation chamber 1 for thermal oxidation, and the gas product after thermal oxidation enters the middle heat storage chamber 2, and the high-temperature gas after thermal oxidation exchanges heat with the heat storage body 21 in the middle heat storage chamber 2, so that it can be used for preheating when it is used as the air intake heat storage chamber 2 later, and then the cooled gas enters the adsorption filler layer 22 in the middle heat storage chamber 2 to adsorb the acidic gas generated after thermal oxidation and cooling, and then is discharged from the purified gas outlet pipeline 5. In the above process, the valve assembly control device 7 controls the valve member 6 in the pipeline connecting the right heat storage chamber 2 with the purge inlet pipeline 4 to open, and the valve member 6 in the pipeline connecting the other heat storage chambers 2 to close, and the purge inlet pipeline 4 takes in air from the right heat storage chamber 2 to purge and clean the middle heat storage chamber 2. After the exhaust and purge cleaning are completed, the valve assembly control device 7 can control the opening and closing of the valve in the next cycle, wherein the three heat storage chambers 2 periodically serve as exhaust gas intake, purified gas exhaust and purge intake, so as to realize the "heat storage" and "heat release preheating" cycles of the heat storage body 21 in the heat storage chamber 2 to be carried out alternately.

[0038] Based on the structures and implementation processes in the above-mentioned embodiments, the adsorption filler layer 22 contains chemical fillers for adsorbing acidic gases. As an expandable solution, the fillers in the adsorption filler layer 22 in this embodiment can also be other fillers. The fillers can be selected according to the final demand of the target gas to achieve precise control of the emission components of the purified gas.

[0039] Further, in some other specific examples, multiple regenerators 2 are arranged side by side, and furnace wall panels are provided on the outer walls of the two outermost regenerators 2 and the outer wall of the thermal oxidation chamber 1, and the end faces of the furnace wall panels of the thermal oxidation chamber 1 are welded to the end faces of the furnace wall panels of the regenerator 2 to form a connection between the thermal oxidation chamber 1 and the regenerator 2. Reinforcing ribs 8 are provided on the furnace wall panels of the thermal oxidation chamber 1 and the regenerator 2. Insulation layers 9 are provided on the inner walls of the thermal oxidation chamber 1 and the regenerator 2.

[0040] It can be understood that the setting of the furnace wall plate can optimize the overall appearance of the acid-resistant gas heat storage type thermal incineration device of the utility model, and can also ensure the sealing of the gas circulation inside the acid-resistant gas heat storage type thermal incineration device; the setting of the reinforcing rib 8 can enhance the structural strength of the acid-resistant gas heat storage type thermal incineration device; the setting of the thermal insulation layer 9 can effectively insulate the interior of the acid-resistant gas heat storage type thermal incineration device, and the heat inside the acid-resistant gas heat storage type thermal incineration device can be effectively and reasonably recycled internally, saving costs.

[0041] In traditional RTO equipment, the downstream parts of the heat storage body need to be made of the high-cost 2205 stainless steel duplex steel. Not only is the initial investment cost high, the raw material procurement cycle is long, and the welding process in the construction link is also difficult compared to ordinary carbon steel. It has high requirements for the technical level of workers, and the later maintenance and replacement costs are higher than conventional designs. Through the structural design of the utility model, the adsorption filler layer 22 adsorbs the acidic gas and then discharges the purified gas. The purified gas is non-corrosive, which can reduce the material grade of the RTO downstream process (fan, dust removal, exhaust pipe, etc.). The use of conventional carbon steel greatly reduces the project investment cost. While reducing the initial investment of the equipment, since the downstream uses ordinary carbon steel, the price of daily maintenance, spare parts, etc. is also reduced accordingly, which further reduces the cost of the equipment throughout its life cycle, greatly reduces the process costs of production, installation, etc., and reduces the invisible costs such as the technical level requirements of workers.

[0042] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the utility model.

Claims

1. An acid gas resistant heat storage type thermal incineration device, characterized in that: include: A thermal oxidation chamber (1) for thermally oxidizing the exhaust gas; A plurality of heat storage chambers (2), wherein the first ends of the plurality of heat storage chambers (2) are respectively connected to the thermal oxidation chamber (1); a heat storage body (21) and an adsorption filler layer (22) are arranged in the heat storage chamber (2); An exhaust gas inlet pipeline (3), the exhaust gas inlet pipeline (3) being connected to the second ends of the plurality of heat storage chambers (2) respectively; a purge inlet pipeline (4), the purge inlet pipeline (4) being connected to the second ends of the plurality of heat storage chambers (2) respectively; A purified gas outlet pipeline (5), wherein the purified gas outlet pipeline (5) is respectively connected to the second ends of the plurality of heat storage chambers (2).

2. The acid-resistant gas regenerative thermal incineration device according to claim 1, characterized in that: The thermal oxidation chamber (1) is connected to the top end of the heat storage chamber (2), and the exhaust gas inlet pipeline (3), the purge inlet pipeline (4) and the purified gas outlet pipeline (5) are all connected to the bottom end of the heat storage chamber (2); the adsorption filler layer (22) is located below the heat storage body (21).

3. The acid-resistant gas regenerative thermal incineration device according to claim 2, characterized in that: A first steel grid (23) and a second steel grid (24) covering the cross section of the heat storage chamber (2) are arranged in the heat storage chamber (2); the first steel grid (23) is located above the second steel grid (24); the heat storage body (21) is mounted on the first steel grid (23); and the adsorption filler layer (22) is mounted on the second steel grid (24).

4. The acid-resistant gas heat storage type thermal incineration device according to claim 3, characterized in that: A plurality of I-beam brackets are arranged in the heat storage chamber (2), and the first steel grid (23) and the second steel grid (24) are respectively fixed in the heat storage chamber (2) via the I-beam brackets.

5. The acid-resistant gas regenerative thermal incineration device according to any one of claims 1 to 4, characterized in that: The pipelines connecting the exhaust gas inlet pipeline (3), the purge inlet pipeline (4) and the purified gas outlet pipeline (5) to the heat storage chamber (2) are all provided with valve components (6), so that the exhaust gas inlet pipeline (3), the purge inlet pipeline (4) and the purified gas outlet pipeline (5) can be connected to different heat storage chambers (2) by opening and closing different valve components (6).

6. The acid-resistant gas regenerative thermal incineration device according to claim 5, characterized in that: The acid gas resistant heat storage type thermal incineration device also includes a valve assembly control device (7), and the valve assembly control device (7) is used to control the opening and closing of different valve components (6).

7. The acid-resistant gas regenerative thermal incineration device according to any one of claims 1 to 4, characterized in that: The adsorption filler layer (22) contains chemical fillers for adsorbing acidic gases.

8. The acid-resistant gas regenerative thermal incineration device according to any one of claims 1 to 4, characterized in that: A plurality of the heat storage chambers (2) are arranged side by side, and furnace wall panels are provided on the outer walls of the two outermost heat storage chambers (2) and the outer wall of the thermal oxidation chamber (1), and the end faces of the furnace wall panels of the thermal oxidation chamber (1) are welded to the end faces of the furnace wall panels of the heat storage chambers (2) to form a connection between the thermal oxidation chamber (1) and the heat storage chambers (2).

9. The acid-resistant gas regenerative thermal incineration device according to claim 8, characterized in that: Reinforcing ribs (8) are provided on the furnace wall plates of the thermal oxidation chamber (1) and the heat storage chamber (2).

10. The acid-resistant gas heat storage type thermal incineration device according to any one of claims 1 to 4, characterized in that: The inner walls of the thermal oxidation chamber (1) and the heat storage chamber (2) are both provided with a heat insulation layer (9).

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