Alternative fuel pyrolysis reactor suitable for cement industry

Abstract

The invention discloses an alternative fuel pyrolysis reactor suitable for the cement industry, and relates to the technical field of pyrolysis reactors, the alternative fuel pyrolysis reactor comprises a furnace body, a flue gas outlet of the furnace body is connected with a wet curtain cooling dust removal device, and an outlet of the wet curtain cooling dust removal device is connected with an electrostatic solid-gas separation device. Pyrolysis exhaust gas sequentially passes through the wet curtain cooling dust removal device and the electrostatic solid gas separation device, the electrostatic solid gas separation device is used for effectively capturing fine solid particles in flue gas, and meanwhile, the wet curtain cooling dust removal device is matched, so that dual purification of harmful dust and part of gaseous pollutants is achieved, and the purification effect is good. The content of dust and gaseous pollutants in the pyrolysis exhaust gas is reduced, the purity of combustible gas in the pyrolysis exhaust gas is improved, the heat value of the pyrolysis exhaust gas is greatly improved, and the problem that the pyrolysis exhaust gas in a pyrolysis reactor contains more dust and gaseous pollutants, so that the pyrolysis exhaust gas cannot be combusted is solved. And the calorific value of the pyrolysis exhaust gas is low.

Description

Technical Field

[0001] The invention relates to the technical field of pyrolysis reactors, in particular to an alternative fuel pyrolysis reactor suitable for cement industry. Background Art

[0002] Cement production is a typical high-energy consumption industry. Clinker burning requires high temperatures (about 1450°C) and a large demand for fuel. Traditionally, fossil fuels such as coal and natural gas are the main sources, but the prices of these resources fluctuate and they have high carbon emission characteristics. As the world advances its carbon neutrality goals, the cement industry is seen as a key area for emission reduction, and it is necessary to reduce dependence on traditional fossil fuels while reducing harmful gas emissions. Some cement companies in my country have begun to try to use alternative fuels, such as waste plastics, rubber and biomass. At present, the technological transformation of the cement industry is mostly focused on energy efficiency optimization, and the application of front-end processing devices such as pyrolysis reactors is still in the exploratory stage.

[0003] The existing pyrolysis reactor has the following problems: the pyrolysis exhaust gas includes combustible gases (such as CO, CH 4 , H 2 ), also contains more dust and gaseous pollutants. The composition of pyrolysis exhaust gas is complex. When pyrolysis exhaust gas is directly used as fuel for cement kiln, the calorific value of fuel is low due to the low content of combustible gas in pyrolysis exhaust gas, which affects the quality of clinker during cement production. Summary of the invention

[0004] In view of the deficiencies in the above-mentioned background technology, the present invention proposes an alternative fuel pyrolysis reactor suitable for the cement industry, which solves the technical problems that the pyrolysis exhaust gas in the existing pyrolysis reactor contains more dust and gaseous pollutants and the calorific value of the pyrolysis exhaust gas is low.

[0005] The technical solution of the present invention is implemented as follows: an alternative fuel pyrolysis reactor suitable for the cement industry comprises a furnace body, a feed inlet of the furnace body is connected to a feed assembly, a waste outlet is provided on the furnace body, a smoke outlet of the furnace body is connected to a wet curtain cooling and dust removal device, an outlet of the wet curtain cooling and dust removal device is connected to an electrostatic solid gas separation device, a waste residue collection pipe and an exhaust pipe are provided on the furnace body, the solid outlet of the electrostatic solid gas separation device is connected to the waste residue collection pipe, and the gas outlet is connected to the exhaust pipe. In the present application, the pyrolysis exhaust gas is sequentially passed through a wet curtain cooling and dust removal device and an electrostatic solid gas separation device, and the electrostatic solid gas separation device is used to effectively capture fine solid particles in the flue gas. At the same time, in conjunction with the wet curtain cooling and dust removal device, dual purification of harmful dust and some gaseous pollutants is achieved, which greatly reduces the content of dust and gaseous pollutants in the pyrolysis exhaust gas, improves the purity of combustible gas in the pyrolysis exhaust gas, greatly improves the calorific value of the pyrolysis exhaust gas, and effectively guarantees the quality of clinker during cement production, thereby solving the technical problems of the existing pyrolysis reactor containing more dust and gaseous pollutants and the low calorific value of the pyrolysis exhaust gas.

[0006] Preferably, the wet curtain cooling and dust removal device includes a cooling and dust removal shell, in which a preliminary dust removal sprinkler and a wet curtain are arranged, the preliminary dust removal sprinkler and the wet curtain are arranged in sequence from the inlet to the outlet of the cooling and dust removal shell, a water circulation component is provided on the outside of the cooling and dust removal shell, the preliminary dust removal sprinkler and the wet curtain are both connected to the water circulation component, and a sewage pipe is provided on the cooling and dust removal shell. That is, the pyrolysis exhaust gas first passes through the preliminary dust removal sprinkler and then is treated by the wet curtain. The dust removal sprinkler sprays cooling water, which cools the pyrolysis exhaust gas on the one hand, and the dust and gaseous pollutants in the pyrolysis exhaust gas fall with the sprayed water on the other hand. The pyrolysis exhaust gas cooled by the preliminary dust removal sprinkler contacts the wet curtain, and the wet curtain is used to further complete dust removal and cooling. The principle of wet curtain dust removal and cooling in this application is mainly based on the effects of water evaporation cooling and filtering dust removal. The wet curtain is made of multi-layer corrugated fiber material. The wet curtain made of multi-layer corrugated fiber material has a large surface area, and water evenly wets the wet curtain through the water circulation component. When the pyrolysis exhaust gas passes through the wet curtain, the water evaporates and absorbs the heat in the pyrolysis exhaust gas, so that the temperature of the pyrolysis exhaust gas is reduced, forming a natural cooling effect. When the dust particles in the pyrolysis exhaust gas pass through the wet wet curtain, they are adsorbed and intercepted by water, reducing the dust concentration in the air. The captured dust is discharged along the sewage pipe along with the water flow, thereby purifying the pyrolysis exhaust gas. Wet curtains can also increase the humidity of the air, which is particularly suitable for dry environments, helping to improve air quality and reduce problems such as static electricity.

[0007] Preferably, the water circulation assembly includes a water supply tank, a water storage tank, a water pipe and a circulating water pump, and the water supply tank, the water storage tank, the water pipe and the circulating water pump are all located outside the cooling and dust removal housing, and the preliminary dust removal sprinkler and the wet curtain are both connected to the water supply tank. The water circulation assembly is provided to provide a water source for the preliminary dust removal sprinkler and the wet curtain circulation, so as to ensure the normal cooling and dust removal work during the use of the pyrolysis reactor of the present application.

[0008] Preferably, at least two preliminary dust removal sprinklers are arranged in the cooling and dust removal shell; at least two wet curtains are arranged in the cooling and dust removal shell. At least two preliminary dust removal sprinklers are arranged in the cooling and dust removal shell to ensure that the cooling and dust removal shell can be quickly filled with water mist, so as to ensure the dust removal and cooling effects of the preliminary dust removal sprinklers; at least two wet curtains are arranged in the cooling and dust removal shell to filter and cool the pyrolysis exhaust gas at least twice, greatly reducing the dust concentration in the air, thereby improving the purity of the combustible gas in the purified pyrolysis exhaust gas.

[0009] Preferably, the preliminary dust removal sprinkler comprises a water pipe, one end of which is connected to an atomizing nozzle and the other end is connected to a water pump, and the water pump is connected to a water supply tank. A start switch is provided on the water pump, and when the start switch is turned on, the water pump draws water from the water supply tank into the water pipe and sprays it out from the atomizing nozzle, and the sprayed atomized small water droplets cool down and remove dust from the pyrolysis exhaust gas.

[0010] Preferably, the electrostatic solid gas separation device comprises a separation shell, the inlet of the separation shell is connected to the outlet of the cooling and dust removal shell, a collecting electrode and a discharge electrode are arranged in the separation shell, the collecting electrode and the discharge electrode are arranged relatively in the separation shell, the solid outlet of the separation shell is connected to the waste slag collection pipe, the gas outlet of the separation shell is connected to the gas outlet pipe, the collecting electrode is located at the solid outlet side of the separation shell, the water supply tank is connected to the separation shell through a water pipeline, and a control valve is provided on the water pipeline. The discharge electrode is fed with high voltage direct current, and a strong electric field is formed around the discharge electrode, so that the particles in the pyrolysis exhaust gas are charged, and the dust particles obtain negative charges through the ionization process. Each dust particle is given the same charge, and the charged dust particles are attracted by the grounded collecting electrode. Due to the principle of attraction between opposite charges, the dust particles are adsorbed on the surface of the collecting electrode. The control valve is opened regularly, and water is transported through the water pipeline to wash the collecting electrode, so that the dust attached to the collecting electrode falls off and flows out along the waste slag collection pipe with the water flow. The control valve controls the opening and closing of the water pipeline. The exhaust gas from pyrolysis in the electric field is discharged from the outlet pipe on the separation shell, and the outlet pipe is connected to the gas storage tank. The combustible gas stored in the gas storage tank is used to ensure the stability and continuity of cement production.

[0011] Preferably, the furnace body is provided with a water-cooled wall and a temperature detector. The main function of the water-cooled wall is to absorb the heat released by combustion, protect the furnace body, and transfer the heat to the boiler water to generate steam. The water-cooled wall is usually composed of a plurality of heat-resistant steel pipes arranged vertically, which are close to the furnace body and have high-pressure water or a steam-water mixture inside. When the fuel burns in the furnace body, the high-temperature flame and flue gas generated are directly radiated to the water-cooled wall tubes, so that the water in the tubes absorbs heat and gradually heats up. After the water in the tubes is heated, the temperature rises, and part of the water is converted into steam to form a steam-water mixture, which flows to the steam drum by natural circulation or forced circulation, and the steam and water are separated in the steam drum. The steam enters the superheater for further heating, and the water returns to the water-cooled wall to continue circulating. The water-cooled wall effectively absorbs the heat of combustion, prevents the furnace wall from being damaged by high temperature, and at the same time improves the thermal efficiency of the boiler and makes the combustion process more stable. Through the coordinated application of water-cooled walls, temperature detectors and wet curtain cooling and dust removal devices, precise control of the internal temperature of the pyrolysis reactor of this application is achieved, so that the pyrolysis reaction is always kept in the best working state, greatly improving the energy conversion rate and overall operating efficiency.

[0012] Preferably, the water-cooled wall is a membrane water-cooled wall, and the membrane water-cooled wall is attached to the furnace body. The membrane water-cooled wall is an airtight structure welded by tubes and fins. The advantages of the membrane water-cooled wall are small heat storage capacity, fast heating and cooling of the combustion chamber, and shortening the start-up and shutdown cooling time of the boiler; compared with the bare tube, the membrane water-cooled wall improves the heat absorption capacity of the tube.

[0013] Preferably, the feeding assembly includes a screw feeder, and a pressure pump is connected to the outlet of the screw feeder, and the outlet of the pressure pump is connected to the feed port of the furnace body. The screw feeder is provided to facilitate the transportation of materials to the furnace body, and the screw feeder operates reliably and has high control accuracy. The pressure pump is provided to pressurize the materials entering the furnace body, and the pressure pump continuously and stably pressurizes and supplies the materials, thereby ensuring a balanced fuel supply in the pyrolysis reactor and a smooth reaction process. At the same time, the pressure pump provides the necessary fluid dynamic conditions for the pyrolysis reaction.

[0014] Preferably, the furnace body is provided with a pressure regulating valve and an explosion-proof device. The pressure regulating valve is provided to regulate the pressure of the furnace body and ensure the pressure balance in the furnace body. The explosion-proof device includes a vent on the top wall of the furnace body, and the explosion-proof device is provided at the vent. The explosion-proof device can be a safety valve or a bursting disc, as long as it can prevent the furnace body from exploding due to excessive pressure.

[0015] Beneficial effects of the present invention: 1. The present invention sequentially passes the pyrolysis exhaust gas through a wet curtain cooling and dust removal device and an electrostatic solid gas separation device, utilizes the electrostatic solid gas separation device to effectively capture fine solid particles in the flue gas, and simultaneously cooperates with the wet curtain cooling and dust removal device to achieve dual purification of harmful dust and some gaseous pollutants, greatly reducing the content of dust and gaseous pollutants in the pyrolysis exhaust gas, improving the purity of the combustible gas in the pyrolysis exhaust gas, greatly improving the calorific value of the pyrolysis exhaust gas, and effectively ensuring the quality of clinker during cement production.

[0016] 2. The present invention realizes precise control of the internal temperature of the pyrolysis reactor of the present application through the coordinated application of water-cooled walls, temperature detectors and wet curtain cooling and dust removal devices, so that the pyrolysis reaction is always kept in the best working state, greatly improving the energy conversion rate and overall operating efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying any creative work.

[0018] Figure 1 It is a schematic diagram of the present invention.

[0019] In the figure: 1 pressure regulating valve, 2 explosion-proof device, 3 temperature detector, 4 water-cooled wall, 5 furnace body, 6 screw feeder, 7 pressure pump device, 9 waste slag collecting pipe, 10 collecting electrode, 11 exhaust pipe, 12 discharge electrode, 13 preliminary dust removal sprinkler, 14 wet curtain. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] Example 1, an alternative fuel pyrolysis reactor suitable for cement industry, such as Figure 1As shown, it includes a furnace body 5, the feed port of the furnace body 5 is connected to a feed assembly, the furnace body 5 is provided with a waste outlet, the smoke outlet of the furnace body 5 is connected to a wet curtain cooling and dust removal device, the outlet of the wet curtain cooling and dust removal device is connected to an electrostatic solid gas separation device, the furnace body 5 is provided with a waste slag collection pipe 9 and an exhaust pipe 11, the solid outlet of the electrostatic solid gas separation device is connected to the waste slag collection pipe 9, and the gas outlet is connected to the exhaust pipe 11. In the present application, the pyrolysis exhaust gas is sequentially passed through a wet curtain cooling and dust removal device and an electrostatic solid gas separation device, and the electrostatic solid gas separation device is used to effectively capture fine solid particles in the flue gas. At the same time, in conjunction with the wet curtain cooling and dust removal device, dual purification of harmful dust and some gaseous pollutants is achieved, which greatly reduces the content of dust and gaseous pollutants in the pyrolysis exhaust gas, improves the purity of combustible gas in the pyrolysis exhaust gas, greatly improves the calorific value of the pyrolysis exhaust gas, and effectively guarantees the quality of clinker during cement production, thereby solving the technical problems of the existing pyrolysis reactor containing more dust and gaseous pollutants and the low calorific value of the pyrolysis exhaust gas.

[0022] Example 2, based on Example 1, an alternative fuel pyrolysis reactor suitable for cement industry, such as Figure 1 As shown, the wet curtain cooling and dust removal device includes a cooling and dust removal shell, in which a preliminary dust removal sprinkler 13 and a wet curtain 14 are arranged, and the preliminary dust removal sprinkler 13 and the wet curtain 14 are arranged in sequence from the inlet to the outlet of the cooling and dust removal shell, and a water circulation component is provided on the outside of the cooling and dust removal shell, and the preliminary dust removal sprinkler 13 and the wet curtain 14 are both connected to the water circulation component, and a sewage pipe is provided on the cooling and dust removal shell. That is, the pyrolysis exhaust gas first passes through the preliminary dust removal sprinkler 13 and then passes through the wet curtain 14 for treatment. The dust removal sprinkler 13 sprays cooling water, which cools the pyrolysis exhaust gas on the one hand, and the dust and gaseous pollutants in the pyrolysis exhaust gas fall with the sprayed water on the other hand. The pyrolysis exhaust gas cooled by the preliminary dust removal sprinkler 13 contacts the wet curtain 14, and the wet curtain 14 is used to further complete dust removal and cooling. The principle of dust removal and cooling of the wet curtain 14 of the present application is mainly based on the effects of water evaporation cooling and filtering dust removal. The wet curtain 14 is made of multi-layer corrugated fiber material. The wet curtain 14 made of multi-layer corrugated fiber material has a large surface area, and water evenly wets the wet curtain 14 through the water circulation component. When the pyrolysis exhaust gas passes through the wet curtain 14, the water evaporates and absorbs the heat in the pyrolysis exhaust gas, so that the temperature of the pyrolysis exhaust gas is reduced, forming a natural cooling effect. When the dust particles in the pyrolysis exhaust gas pass through the wet wet curtain 14, they are adsorbed and intercepted by water, reducing the dust concentration in the air. The captured dust is discharged along the drain pipe along with the water flow, thereby purifying the pyrolysis exhaust gas. The wet curtain 14 can also increase the humidity of the air, which is particularly suitable for dry environments, helping to improve air quality and reduce problems such as static electricity.

[0023] Example 3, based on Example 2, an alternative fuel pyrolysis reactor suitable for cement industry, such as Figure 1 As shown, the water circulation assembly includes a water supply tank, a water storage tank, a water pipe and a circulating water pump, and the water supply tank, the water storage tank, the water pipe and the circulating water pump are all located outside the cooling and dust removal housing, and the preliminary dust removal sprinkler 13 and the wet curtain 14 are both connected to the water supply tank. The water circulation assembly is provided to provide a water source for the preliminary dust removal sprinkler 13 and the wet curtain 14 to circulate, so as to ensure the normal cooling and dust removal work during the use of the pyrolysis reactor of the present application.

[0024] Example 4, based on Example 3, an alternative fuel pyrolysis reactor suitable for cement industry, such as Figure 1 As shown, at least two preliminary dust removal sprinklers 13 are arranged in the cooling and dust removal housing; at least two wet curtains 14 are arranged in the cooling and dust removal housing. At least two preliminary dust removal sprinklers 13 are arranged in the cooling and dust removal housing to ensure that the cooling and dust removal housing can be quickly filled with water mist, so as to ensure the dust removal and cooling effects of the preliminary dust removal sprinklers 13; at least two wet curtains 14 are arranged in the cooling and dust removal housing to filter and cool the pyrolysis exhaust gas at least twice, greatly reducing the dust concentration in the air, thereby improving the purity of the combustible gas in the purified pyrolysis exhaust gas.

[0025] Example 5, based on Example 4, an alternative fuel pyrolysis reactor suitable for cement industry, such as Figure 1 As shown, the preliminary dust removal sprinkler 13 includes a water pipe, one end of which is connected to an atomizing nozzle and the other end is connected to a water pump, which is connected to a water supply tank. A start switch is provided on the water pump. When the start switch is turned on, the water pump draws water from the water supply tank into the water pipe and sprays it out from the atomizing nozzle. The sprayed atomized water droplets cool down and remove dust from the pyrolysis exhaust gas.

[0026] Example 6, based on Example 5, an alternative fuel pyrolysis reactor suitable for cement industry, such as Figure 1As shown, the electrostatic solid-gas separation device includes a separation shell, the inlet of the separation shell is connected to the outlet of the cooling and dust removal shell, a collecting electrode 10 and a discharge electrode 12 are provided in the separation shell, the collecting electrode 10 and the discharge electrode 12 are relatively arranged in the separation shell, the solid outlet of the separation shell is connected to the waste residue collection pipe 9, the gas outlet of the separation shell is connected to the gas outlet pipe 11, the collecting electrode 10 is located at the solid outlet side of the separation shell, the water supply tank is connected to the separation shell through a water supply pipeline, and a control valve is provided on the water supply pipeline. High voltage direct current is passed through the discharge electrode 12, forming a strong electric field around the discharge electrode 12, so that the particles in the pyrolysis exhaust gas are charged, and the dust particles obtain negative charges through the ionization process. Each dust particle is given the same charge, and the charged dust particles are attracted by the grounded collector 10. Due to the principle of attraction between opposite charges, the dust particles are adsorbed on the surface of the collector 10. The control valve is opened regularly, and water is transported through the water pipeline to flush the collector 10, so that the dust attached to the collector 10 falls off and flows out along the waste residue collection pipe 9 with the water flow. The pyrolysis exhaust gas that passes through the electric field is discharged from the outlet pipe 11 on the separation shell, and the outlet pipe 11 is connected to the gas storage tank. The combustible gas stored in the gas storage tank is used to ensure the stability and continuity of cement production.

[0027] Example 7, based on any one of Examples 1 to 6, an alternative fuel pyrolysis reactor suitable for cement industry, such as Figure 1 As shown, the furnace body 5 is provided with a water-cooled wall 4 and a temperature detector 3. The main function of the water-cooled wall 4 is to absorb the heat released by combustion, protect the furnace body 5, and transfer the heat to the boiler water to generate steam. The water-cooled wall 4 is usually composed of a plurality of heat-resistant steel pipes arranged vertically, which are close to the furnace body 5 and have high-pressure water or a steam-water mixture passing through them. When the fuel burns in the furnace body 5, the high-temperature flame and flue gas generated are directly radiated to the water-cooled wall tubes, so that the water in the tubes absorbs heat and gradually heats up. After the water in the tubes is heated, the temperature rises, and part of the water is converted into steam to form a steam-water mixture, which flows to the steam drum by natural circulation or forced circulation, and the steam and water are separated in the steam drum. The steam enters the superheater for further heating, and the water returns to the water-cooled wall 4 to continue to circulate. The water-cooled wall 4 effectively absorbs the heat of combustion, prevents the furnace wall from being damaged by high temperature, and at the same time improves the thermal efficiency of the boiler and makes the combustion process more stable. Through the coordinated application of the water-cooled wall 4, the temperature detector 3 and the wet curtain cooling and dust removal device, precise control of the internal temperature of the pyrolysis reactor of the present application is achieved, so that the pyrolysis reaction is always kept in the best working state, greatly improving the energy conversion rate and the overall operating efficiency.

[0028] Example 8, based on Example 7, an alternative fuel pyrolysis reactor suitable for cement industry, such as Figure 1As shown, the water-cooled wall 4 is a membrane water-cooled wall, and the membrane water-cooled wall is attached to the furnace body 5. The membrane water-cooled wall is an airtight structure welded by tubes and fins. The advantages of the membrane water-cooled wall are small heat storage capacity, fast heating and cooling of the combustion chamber, and shortening the start-up and shutdown cooling time of the boiler; compared with the bare tube, the membrane water-cooled wall improves the heat absorption capacity of the tube.

[0029] Example 9, based on Example 8, an alternative fuel pyrolysis reactor suitable for cement industry, such as Figure 1 As shown, the feeding assembly includes a screw feeder 6, and a pressure pump 7 is connected to the outlet of the screw feeder 6, and the outlet of the pressure pump 7 is connected to the feed port of the furnace body 5. The screw feeder 6 is provided to facilitate the delivery of materials to the furnace body 5, and the screw feeder 6 operates reliably and has high control accuracy. The pressure pump 7 is provided to pressurize the materials entering the furnace body 5. The pressure pump 7 continuously and stably pressurizes and supplies the materials, ensuring that the fuel supply in the pyrolysis reactor is balanced and the reaction process is smooth and unobstructed. At the same time, the pressure pump 7 provides the necessary fluid dynamic conditions for the pyrolysis reaction.

[0030] Example 10, based on Example 9, an alternative fuel pyrolysis reactor suitable for cement industry, such as Figure 1 As shown, the furnace body 5 is provided with a pressure regulating valve 1 and an explosion-proof device 2. The pressure regulating valve 1 is provided to regulate the pressure of the furnace body 5 and ensure the pressure balance in the furnace body 5. The explosion-proof device 2 includes a gas vent on the top wall of the furnace body 5, and the explosion-proof device 2 is provided at the gas vent. The explosion-proof device 2 can be a safety valve or a bursting disc, as long as it can prevent the furnace body 5 from exploding due to excessive pressure.

[0031] When Example 10 is implemented, the alternative fuel is put into the inlet of the screw feeder 6, and the alternative fuel enters the pressure pump 7 through the screw feeder 6. The pressure pump 7 pressurizes the alternative fuel and then the alternative fuel enters the furnace body 5. The alternative fuel is burned and pyrolyzed in the furnace body 5. After the alternative fuel is pyrolyzed, the pyrolysis exhaust gas enters the cooling and dust removal shell along the flue gas outlet of the furnace body 5. A starting switch is provided on the water pump. When the starting switch is turned on, the water pump draws water in the water supply tank into the water pipe and sprays it from the atomizing nozzle. The sprayed atomized small water droplets cool down and remove dust from the pyrolysis exhaust gas. The pyrolysis exhaust gas cooled by the preliminary dust removal sprinkler 13 contacts the wet curtain 14. The dust particles in the pyrolysis exhaust gas are adsorbed and retained by the water when passing through the wet wet curtain 14, thereby reducing the dust concentration in the air. The captured dust is discharged along the drain pipe with the water flow, thereby completing the preliminary purification of the pyrolysis exhaust gas. The pyrolysis exhaust gas after preliminary purification enters the separation shell, and the discharge electrode 12 is connected to a high-voltage direct current to form a strong electric field around the discharge electrode 12, so that the particles in the pyrolysis exhaust gas are charged. The dust particles obtain a negative charge through the ionization process. Each dust particle is given the same charge, and the charged dust particles are attracted by the grounded collecting electrode 10. Due to the principle of attraction between opposite charges, the dust particles are adsorbed on the surface of the collecting electrode 10. The collecting electrode 10 is regularly flushed with water delivered by a water pipeline to make the dust attached to the collecting electrode 10 fall off and flow out along the waste residue collection pipe 9 with the water flow. The pyrolysis exhaust gas passing through the electric field enters the gas storage tank from the outlet pipe 11 on the separation shell.

[0032] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An alternative fuel pyrolysis reactor suitable for cement industry, comprising a furnace body (5), characterized in that: The feed inlet of the furnace body (5) is connected to a feed assembly, the furnace body (5) is provided with a waste outlet, the smoke outlet of the furnace body (5) is connected to a wet curtain cooling and dust removal device, the outlet of the wet curtain cooling and dust removal device is connected to an electrostatic solid gas separation device, the furnace body (5) is provided with a waste slag collection pipe (9) and an air outlet pipe (11), the solid outlet of the electrostatic solid gas separation device is connected to the waste slag collection pipe (9), and the gas outlet is connected to the air outlet pipe (11).

2. The alternative fuel pyrolysis reactor suitable for cement industry according to claim 1, characterized in that: The wet curtain cooling and dust removal device comprises a cooling and dust removal shell, wherein a preliminary dust removal sprinkler (13) and a wet curtain (14) are arranged in the cooling and dust removal shell, wherein the preliminary dust removal sprinkler (13) and the wet curtain (14) are arranged in sequence from the inlet to the outlet of the cooling and dust removal shell, wherein a water circulation component is arranged outside the cooling and dust removal shell, wherein the preliminary dust removal sprinkler (13) and the wet curtain (14) are both connected to the water circulation component, and wherein a sewage discharge pipe is arranged on the cooling and dust removal shell.

3. The alternative fuel pyrolysis reactor suitable for cement industry according to claim 2, characterized in that: The water circulation assembly comprises a water supply tank, a water storage tank, a water pipe and a circulating water pump. The water supply tank, the water storage tank, the water pipe and the circulating water pump are all located outside the cooling and dust removal housing. The preliminary dust removal sprinkler (13) and the wet curtain (14) are both connected to the water supply tank.

4. The alternative fuel pyrolysis reactor suitable for cement industry according to claim 3, characterized in that: At least two preliminary dust removal sprinklers (13) are arranged in the cooling and dust removal housing; and at least two wet curtains (14) are arranged in the cooling and dust removal housing.

5. The alternative fuel pyrolysis reactor suitable for cement industry according to claim 4, characterized in that: The preliminary dust removal sprinkler (13) comprises a water pipe, one end of which is connected to an atomizing nozzle and the other end of which is connected to a water pump, and the water pump is connected to a water supply tank.

6. The alternative fuel pyrolysis reactor suitable for cement industry according to claim 5, characterized in that: The electrostatic solid-gas separation device comprises a separation shell, the inlet of the separation shell is connected to the outlet of the cooling and dust removal shell, a collecting electrode (10) and a discharge electrode (12) are arranged in the separation shell, the collecting electrode (10) and the discharge electrode (12) are arranged relative to each other in the separation shell, the solid outlet of the separation shell is connected to a waste residue collection pipe (9), the gas outlet of the separation shell is connected to an outlet pipe (11), the collecting electrode (10) is located on the solid outlet side of the separation shell, and the water supply tank is connected to the separation shell via a water supply pipeline, and a control valve is provided on the water supply pipeline.

7. The alternative fuel pyrolysis reactor suitable for cement industry according to any one of claims 1 to 6, characterized in that: The furnace body (5) is provided with a water-cooled wall (4) and a temperature detector (3).

8. The alternative fuel pyrolysis reactor suitable for cement industry according to claim 7, characterized in that: The water-cooled wall (4) is a membrane-type water-cooled wall, and the membrane-type water-cooled wall is attached to the furnace body (5).

9. The alternative fuel pyrolysis reactor suitable for cement industry according to claim 8, characterized in that: The feeding assembly comprises a screw feeder (6), the outlet of the screw feeder (6) is connected to a pressure pump (7), and the outlet of the pressure pump (7) is communicated with the feeding port of the furnace body (5).

10. The alternative fuel pyrolysis reactor suitable for cement industry according to claim 9, characterized in that: The furnace body (5) is provided with a pressure regulating valve (1) and an explosion-proof device (2).

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