Tail gas treatment device of rotary kiln for hazardous waste incineration

Abstract

The utility model discloses a tail gas treatment device of a rotary kiln for hazardous waste incineration, which comprises a spraying component mounted at the top of a spraying tower body and used for tail gas treatment after high-temperature incineration of the rotary kiln; the spraying assembly comprises a plurality of spraying boxes, a main shaft and a first rotation driving part, and the spraying boxes are horizontally and fixedly installed on the main shaft in parallel from top to bottom at intervals, so that a multi-stage spraying channel is formed by the spraying boxes; the spraying assembly is arranged in the spraying tower body, so that the spraying assembly performs multi-stage spraying treatment on tail gas entering the spraying tower body. A spray tower body with a multi-stage spray assembly is arranged at the tail end of a rotary kiln, so that a plurality of spray boxes which are arranged side by side from top to bottom and are arranged at intervals on a main shaft on the spray assembly form a multi-stage spray channel, and the spray assembly is used for carrying out multi-stage alkali liquor spray treatment on hazardous waste incineration tail gas in the spray tower body; the treatment efficiency and the treatment effect of the tail gas treatment device on the hazardous waste incineration tail gas are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of hazardous waste treatment, in particular to a rotary kiln tail gas treatment device for hazardous waste incineration. Background Art

[0002] A rotary kiln refers to a rotary calcining kiln (commonly known as a rotary kiln), which belongs to the category of building materials equipment. When hazardous waste is incinerated at high temperature, a rotary kiln is used to incinerate hazardous waste at high temperature. A large amount of toxic tail gas will be generated during the incineration of hazardous waste in a rotary kiln, which needs to be treated before it can be discharged. The existing rotary kiln tail gas treatment device needs to spray a large amount of high-temperature tail gas with alkali liquid when in use, so that the toxic gases or particles in the toxic tail gas are neutralized or adsorbed by the alkali liquid molecules.

[0003] Patent application No. 202110962125.2 discloses a rotary kiln exhaust gas treatment device, whose structure does not set a multi-stage spray component on the spray tower of the exhaust gas treatment device, so that the multi-stage spray component performs multi-stage spray neutralization and adsorption on the high-temperature toxic exhaust gas generated by the rotary kiln, so that the harmful gases and toxic particles in the exhaust gas are neutralized and then dropped to the bottom of the spray tower for collection, thereby improving the treatment efficiency and quality of hazardous waste incineration exhaust gas. Utility Model Content

[0004] In view of the above-mentioned defects or shortcomings in the prior art, it is desired to provide a rotary kiln exhaust gas treatment device for hazardous waste incineration, which is used to solve the technical problem that the existing rotary kiln exhaust gas treatment device for hazardous waste incineration does not have a multi-stage spray assembly on the spray tower of the exhaust gas treatment device, so that the multi-stage spray assembly can perform multi-stage spray neutralization and adsorption on the high-temperature toxic exhaust gas generated by the rotary kiln, so that the harmful gases and toxic particles in the exhaust gas are neutralized and then dropped to the bottom of the spray tower for collection, thereby improving the treatment efficiency and treatment quality of the hazardous waste incineration exhaust gas.

[0005] According to the technical solution provided in the embodiment of the present application, a rotary kiln tail gas treatment device for hazardous waste incineration includes a spray assembly installed on the top of the spray tower body and used for tail gas treatment after high-temperature incineration in the rotary kiln;

[0006] The spray assembly comprises a plurality of spray boxes, a main shaft and a first rotating driving member, wherein the plurality of spray boxes are horizontally arranged side by side from top to bottom and fixedly installed on the main shaft at intervals, so that the plurality of spray boxes form a multi-stage spray channel, so that the spray assembly performs multi-stage spray treatment on the tail gas entering the interior of the spray tower body, and the main shaft is fixedly connected to the output end of the first rotating driving member, so that the first rotating driving member drives the plurality of spray boxes installed on the main shaft to rotate, so that the spray assembly performs rotational spray treatment on the tail gas;

[0007] A plurality of baffles are arranged in parallel and at intervals from top to bottom along the inside of the spray tower body, and each baffle is arranged at the bottom of each spray box, so that the baffle can concentrate the exhaust gas at the bottom of the spray box, so that the exhaust gas and the alkali solution sprayed from the spray box are evenly mixed.

[0008] Furthermore, the spray assembly also includes an alkali liquid tank and an infusion tube, the infusion tube is connected to an infusion cavity arranged on the top of the smoke exhaust pipe, and the liquid outlet on the alkali liquid tank is fixedly connected to the infusion tube, so that the infusion tube can input the alkali liquid into the infusion cavity.

[0009] Furthermore, a main shaft is rotatably installed in the infusion cavity. The main shaft is a cavity structure rod, and a liquid inlet is arranged at a position in the infusion cavity so that the alkaline solution enters each spray box connected to the main shaft from the liquid inlet.

[0010] Furthermore, the spray box is an annular structure, and a plurality of spray holes are arranged at the bottom of the spray box, so that the alkali solution in the spray box is sprayed out from each of the spray holes, so that the alkali solution is fully contacted and neutralized with the tail gas inside the spray tower body.

[0011] Furthermore, the baffle is an open annular conical structure, which is provided with a plurality of guide grooves on the outside, and the guide grooves are arranged in parallel and at intervals, so that the neutralized alkali solution flows from the guide grooves into the bottom of the baffle, and flows from the guide holes correspondingly arranged at the bottom of the baffle into the bottom of the spray tower body for collection.

[0012] Furthermore, a valve is provided on the infusion tube so that the valve controls the opening and closing of the infusion tube.

[0013] Furthermore, a smoke inlet pipe is fixedly connected to the side of the spray tower body, and the smoke inlet pipe is fixedly connected to the tail end of the rotary kiln, so that the smoke inlet pipe inputs the tail gas generated by the incineration of the rotary kiln into the interior of the spray tower body for spraying treatment.

[0014] In summary, the beneficial effects of this application are:

[0015] 1. By arranging a spray tower body with a multi-stage spray assembly at the tail end of the rotary kiln, a plurality of spray boxes arranged in parallel and at intervals from top to bottom on the main axis of the spray assembly form a multi-stage spray channel, so that the spray assembly performs multi-stage alkali liquid spray treatment on the hazardous waste incineration tail gas in the spray tower body, thereby improving the treatment efficiency and treatment effect of the tail gas treatment device on the hazardous waste incineration tail gas;

[0016] Second, a rotatable spray assembly is arranged on the top of the spray tower body, so that the alkali liquid output from the alkali liquid box on the spray assembly is input into the infusion cavity from the infusion tube, and enters the main shaft from the infusion cavity, so that the alkali liquid is sprayed out from a plurality of spray boxes connected to the main shaft, and at the same time, the first rotating driving member drives the main shaft to rotate, so that the plurality of spray boxes connected to the main shaft rotate, so that the alkali liquid in the spray box rotates to neutralize and adsorb the toxic tail gas in the spray tower, so that the alkali liquid is fully in contact with the components in the toxic tail gas, thereby improving the treatment efficiency and treatment effect of the tail gas treatment device on the tail gas from the incineration of hazardous wastes;

[0017] 3. By setting corresponding baffles at the bottom of each spray box inside the spray tower body, the baffle with a conical cavity structure can gather the exhaust gas in the spray tower at the bottom of the spray box, so that the exhaust gas can fully contact with the alkali solution sprayed from the spray box. At the same time, the neutralized alkali solution flows from the guide groove set on the baffle to the guide hole, and flows from the guide hole to the bottom of the spray tower for collection, thereby improving the treatment efficiency and treatment effect of the exhaust gas treatment device for hazardous waste incineration exhaust gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Other features, objects and advantages of the present application will become more apparent by reading the detailed description of non-limiting embodiments made with reference to the following drawings:

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

[0020] Figure 2 This is a schematic diagram of the cross-sectional structure of the spray tower of the utility model;

[0021] Figure 3 This is a schematic diagram of the front cross-sectional structure of the spray tower of the utility model;

[0022] Figure 4 This is a schematic diagram of the bottom structure of the spray assembly of the utility model;

[0023] Figure 5 This is a schematic diagram of the baffle structure of the utility model.

[0024] Numbers in the figure: spray assembly -100, spray box -110, spray hole -111, main shaft -120, liquid inlet -121, first rotating drive member -130, alkali liquid tank -140, infusion pipe -150, valve -151, spray tower body -200, smoke exhaust pipe -210, infusion cavity -211, smoke inlet pipe -220, baffle -300, guide groove -301, guide hole -302. DETAILED DESCRIPTION

[0025] The present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the relevant utility model, rather than to limit the utility model. It is also necessary to explain that, for ease of description, only the parts related to the utility model are shown in the accompanying drawings.

[0026] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0027] A rotary kiln tail gas treatment device for hazardous waste incineration, the structure of which is as follows Figure 1-Figure 5 As shown, it includes a spray assembly 100, which is installed at the top of the inside of the spray tower body 200 and is used for treating the tail gas after high-temperature incineration in the rotary kiln; the spray assembly 100 includes a plurality of spray boxes 110, a main shaft 120 and a first rotating driving member 130, and the plurality of spray boxes 110 are horizontally arranged from top to bottom and fixedly installed on the main shaft 120 at intervals, so that the plurality of spray boxes 110 form a multi-stage spray channel, so that the plurality of spray boxes 110 perform multi-stage spray treatment on the tail gas entering the inside of the spray tower body 200, thereby improving the spray tower body 200 to treat the high-temperature tail gas. The exhaust gas treatment efficiency is improved, and the main shaft 120 is fixedly connected to the output end of the first rotating driving member 130, so that the first rotating driving member 130 drives a plurality of spray boxes 110 installed on the main shaft 120 to rotate, so that the spray assembly 100 rotates to spray the exhaust gas; a plurality of baffles 300 are arranged in parallel and at intervals from top to bottom along the inside of the spray tower body 200, and each baffle 300 is arranged at the bottom of each spray box 110, so that the baffle 300 concentrates the exhaust gas at the bottom of the spray box 110, so that the exhaust gas and the alkali solution sprayed from the spray box 110 are evenly mixed.

[0028] When the spray tower body 200 treats the high-temperature toxic exhaust gas generated during the incineration of the rotary kiln, the toxic exhaust gas generated during the high-temperature incineration of hazardous waste by the rotary kiln enters the spray tower body 200 through the smoke inlet pipe 220, and the high-temperature toxic exhaust gas flows from bottom to top in the internal cavity of the spray tower body 200. The spray assembly 100 installed in the spray tower body 200 is started, so that the alkali liquid in the alkali liquid tank 140 is transported from the infusion pipe 150 to the infusion cavity 211 under the transportation of the water pump, and enters each spray box 110 from the liquid inlet 121 set on the main shaft 120, and each spray box 110 is arranged side by side and spaced from top to bottom along the main shaft, so that a plurality of spray boxes 110 form a multi-stage spray channel to perform multi-stage alkali liquid spraying on the high-temperature exhaust gas. The treatment efficiency of the exhaust gas treatment device is improved, and the first rotating drive member 130 on the spray assembly 100 is started, so that the first rotating drive member 130 drives the plurality of spray boxes 110 connected to the main shaft 120 to rotate, so that the alkali solution in the spray box 110 is rotationally sprayed, so that the alkali solution is fully in contact with the high-temperature exhaust gas, so that the alkali solution can neutralize and adsorb the toxic components in the high-temperature exhaust gas, and the alkali solution after the neutralization reaction and adsorption enters the baffle 300 set at the bottom of each spray box 110, and flows from the guide groove 301 set on the baffle 300 into the guide hole 302 at the bottom, and enters the bottom of the spray tower body 200 from the guide hole 302 for collection, thereby improving the treatment efficiency and treatment effect of the exhaust gas treatment device for hazardous waste incineration exhaust gas.

[0029] As a preferred embodiment, please refer to Figure 1 and Figure 2 The spray assembly 100 also includes an alkali liquid tank 140 and an infusion pipe 150, and a smoke exhaust pipe 210 is arranged on the top of the spray tower body 200. The infusion pipe 150 is connected to an infusion cavity 211 arranged on the top of the smoke exhaust pipe 210, and the liquid outlet on the alkali liquid tank 140 is fixedly connected to the infusion pipe 150, so that the infusion pipe 150 can input the alkali liquid in the alkali liquid tank 140 into the infusion cavity 211.

[0030] As a preferred embodiment, please refer to Figure 3 and Figure 4 A main shaft 120 is also rotatably installed in the infusion cavity 211. The main shaft 120 is a cavity structure rod, and a liquid inlet 121 is provided at a position located in the infusion cavity 211, so that the alkali liquid enters each spray box 110 connected to the main shaft 120 from the liquid inlet 121, so that the alkali liquid is sprayed out from the spray box 110 to neutralize the high-temperature exhaust gas with the alkali liquid.

[0031] As a preferred embodiment, please refer to Figure 4The spray box 110 is an annular structure, and a plurality of spray holes 111 are arranged at the bottom of the spray box 110, and each spray hole 111 is evenly distributed at the bottom of the spray box 110, so that the alkali solution in the spray box 110 is sprayed out from each spray hole 111, so that the alkali solution is fully contacted and neutralized with the exhaust gas inside the spray tower body 200, thereby improving the treatment efficiency and treatment effect of the exhaust gas treatment device on the exhaust gas from the incineration of hazardous waste.

[0032] As a preferred embodiment, please refer to Figure 2 and Figure 5 The baffle 300 is an open annular conical structure, and is provided with a plurality of guide grooves 301 on the outside. The guide grooves 301 are arranged in parallel and at intervals, so that the neutralized alkali solution flows from each guide groove 301 into the bottom of the baffle 300, and flows from the guide holes 302 correspondingly arranged at the bottom of the baffle 300 into the bottom of the spray tower body 200 for collection.

[0033] As a preferred embodiment, please refer to Figure 1 and Figure 2 A valve 151 is also provided on the infusion tube 150 so that the valve 151 controls the opening and closing of the infusion tube 150 .

[0034] As a preferred embodiment, please refer to Figure 1 and Figure 2 A smoke inlet pipe 220 is also fixedly connected to the side of the spray tower body 200, and the smoke inlet pipe 220 is fixedly connected to the tail end of the rotary kiln, so that the smoke inlet pipe 220 inputs the exhaust gas generated by the incineration of the rotary kiln into the spray tower body 200 for spraying treatment.

[0035] The working principle of the rotary kiln tail gas treatment device for hazardous waste incineration is as follows:

[0036] When the spray tower body 200 treats the high-temperature toxic exhaust gas generated during the incineration of the rotary kiln, the toxic exhaust gas generated during the high-temperature incineration of hazardous waste by the rotary kiln enters the spray tower body 200 through the smoke inlet pipe 220, and the high-temperature toxic exhaust gas flows from bottom to top in the internal cavity of the spray tower body 200. The spray assembly 100 installed in the spray tower body 200 is started, so that the alkali liquid in the alkali liquid tank 140 is transported from the infusion pipe 150 to the infusion cavity 211 under the transportation of the water pump, and enters each spray box 110 from the liquid inlet 121 set on the main shaft 120, and each spray box 110 is arranged side by side and spaced from top to bottom along the main shaft 120, so that a plurality of spray boxes 110 form a multi-stage spray channel, and multi-stage alkali liquid spray is performed on the high-temperature exhaust gas. The exhaust gas treatment device is sprayed to improve the treatment efficiency of the exhaust gas treatment device, and the first rotating drive member 130 on the spray assembly 100 is started, so that the first rotating drive member 130 drives the plurality of spray boxes 110 connected to the main shaft 120 to rotate, so that the alkali solution in the spray box 110 is rotationally sprayed, so that the alkali solution is fully in contact with the high-temperature exhaust gas, so that the alkali solution can neutralize and adsorb the toxic components in the high-temperature exhaust gas, and the alkali solution after neutralization and adsorption enters the baffle 300 set at the bottom of each spray box 110, and flows from the guide groove 301 set on the baffle 300 into the guide hole 302 at the bottom, and enters the bottom of the spray tower body 200 from the guide hole 302 for collection, thereby improving the treatment efficiency and treatment effect of the exhaust gas treatment device for hazardous waste incineration exhaust gas.

[0037] The beneficial effects of the rotary kiln tail gas treatment device for hazardous waste incineration in the utility model are:

[0038] 1. A spray tower body 200 with a multi-stage spray assembly 100 is arranged at the rear end of the rotary kiln, so that a plurality of spray boxes 110 arranged in parallel and at intervals from top to bottom on the main shaft 120 of the spray assembly 100 form a multi-stage spray channel, so that the spray assembly 100 performs multi-stage alkali liquid spray treatment on the hazardous waste incineration tail gas in the spray tower body 200, thereby improving the treatment efficiency and treatment effect of the tail gas treatment device on the hazardous waste incineration tail gas;

[0039] Second, a rotatable spray assembly 100 is arranged on the top of the spray tower body 200, so that the alkali solution output from the alkali solution box 140 on the spray assembly 100 is input into the infusion cavity 211 from the infusion tube 150, and enters the main shaft 120 from the infusion cavity 211, so that the alkali solution is sprayed out from the plurality of spray boxes 110 connected to the main shaft 120, and at the same time, the first rotating driving member 130 drives the main shaft 120 to rotate, so that the plurality of spray boxes 110 connected to the main shaft 120 rotate, so that the alkali solution in the spray box 110 rotates to neutralize and adsorb the toxic exhaust gas in the spray tower, so that the alkali solution is fully in contact with the components in the toxic exhaust gas, thereby improving the treatment efficiency and treatment effect of the exhaust gas treatment device on the exhaust gas from the incineration of hazardous wastes;

[0040] 3. By setting corresponding baffles 300 at the bottom of each spray box 110 inside the spray tower body 200, the baffle 300 with a conical cavity structure can gather the exhaust gas in the spray tower at the bottom of the spray box 110, so that the exhaust gas can fully contact with the alkaline solution sprayed from the spray box 110, and at the same time, the neutralized alkaline solution flows from the guide groove 301 set on the baffle 300 to the guide hole 302, and flows from the guide hole 302 to the bottom of the spray tower for collection, thereby improving the treatment efficiency and treatment effect of the exhaust gas treatment device for hazardous waste incineration exhaust gas.

[0041] The above description is only an explanation of the preferred embodiments of the present application and the technical principles and other schemes used. At the same time, the scope of the utility model involved in the present application is not limited to the technical scheme formed by a specific combination of the above technical features, but also includes other technical schemes formed by any combination of the above technical features or their equivalent features without departing from the concept of the utility model. For example, the above features are replaced with the technical features with similar functions disclosed in the present application (but not limited to) to form a technical scheme.

Claims

1. A rotary kiln tail gas treatment device for hazardous waste incineration, characterized by: It comprises a spray assembly (100) which is installed on the top of a spray tower body (200) and is used for treating tail gas after high-temperature incineration in a rotary kiln; The spray assembly (100) comprises a plurality of spray boxes (110), a main shaft (120) and a first rotating driving member (130); the plurality of spray boxes (110) are horizontally arranged from top to bottom and fixedly installed on the main shaft (120) at intervals, so that the plurality of spray boxes (110) form a multi-stage spray channel, so that the spray assembly (100) performs multi-stage spray treatment on the exhaust gas entering the interior of the spray tower body (200); and the main shaft (120) is fixedly connected to the output end of the first rotating driving member (130), so that the first rotating driving member (130) drives the plurality of spray boxes (110) installed on the main shaft (120) to rotate, so that the spray assembly (100) performs a rotational spray treatment on the exhaust gas; A plurality of baffles (300) are arranged in parallel and at intervals from top to bottom along the inside of the spray tower body (200), and each of the baffles (300) is arranged at the bottom of each of the spray boxes (110), so that the baffles (300) can concentrate the exhaust gas at the bottom of the spray box (110), so that the exhaust gas and the alkali solution sprayed from the spray box (110) are evenly mixed.

2. The rotary kiln tail gas treatment device for hazardous waste incineration according to claim 1 is characterized in that: The spray assembly (100) further comprises an alkaline liquid tank (140) and an infusion pipe (150); the infusion pipe (150) is connected to an infusion cavity (211) arranged at the top of the smoke exhaust pipe (210); and a liquid outlet on the alkaline liquid tank (140) is fixedly connected to the infusion pipe (150) so that the infusion pipe (150) can input the alkaline liquid into the infusion cavity (211).

3. The rotary kiln tail gas treatment device for hazardous waste incineration according to claim 2 is characterized in that: A main shaft (120) is also rotatably mounted in the infusion cavity (211); the main shaft (120) is a hollow structural rod, and a liquid inlet (121) is provided at a position in the infusion cavity (211) so that alkaline solution can enter each spray box (110) connected to the main shaft (120) through the liquid inlet (121).

4. The rotary kiln tail gas treatment device for hazardous waste incineration according to claim 1 is characterized by: The spray box (110) is an annular structure, and a plurality of spray holes (111) are arranged at the bottom of the spray box (110), so that the alkali solution in the spray box (110) is sprayed out from each of the spray holes (111), so that the alkali solution is fully contacted with the tail gas inside the spray tower body (200) for neutralization.

5. The rotary kiln tail gas treatment device for hazardous waste incineration according to claim 1 is characterized by: The baffle (300) is an open annular conical structure, and is provided with a plurality of guide grooves (301) on the outer side. The guide grooves (301) are arranged in parallel and at intervals, so that the neutralized alkali solution flows from the guide grooves (301) into the bottom of the baffle (300), and flows from the guide holes (302) correspondingly arranged at the bottom of the baffle (300) into the bottom of the spray tower body (200) for collection.

6. The rotary kiln tail gas treatment device for hazardous waste incineration according to claim 2 is characterized by: The infusion tube (150) is also provided with a valve (151) so that the valve (151) controls the opening and closing of the infusion tube (150).

7. The rotary kiln tail gas treatment device for hazardous waste incineration according to claim 1 is characterized by: A smoke inlet pipe (220) is also fixedly connected to the side of the spray tower body (200), and the smoke inlet pipe (220) is fixedly connected to the tail end of the rotary kiln, so that the smoke inlet pipe (220) inputs the tail gas generated by the incineration of the rotary kiln into the interior of the spray tower body (200) for spraying treatment.

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