Environment-friendly dust removal system of cremation machine SCR technology

Abstract

The utility model relates to the technical field of cremator, concretely relates to a cremator SCR technology environmental protection dust removal system, including cremator, still including the quick cooling radiator, cyclone dust collector, spark interceptor, cloth bag dust collector, SCR temperature rising stove, SCR catalytic reactor, frequency conversion air draught fan and desulfurizing tower that are connected with cremator smoke outlet in proper order, and the activated carbon powder feeder that is arranged between spark interceptor and cloth bag dust collector, be provided with underground flue between cremator smoke outlet and quick cooling radiator, quick cooling radiator, cyclone dust collector, spark interceptor, cloth bag dust collector, SCR temperature rising stove, SCR catalytic reactor, frequency conversion air draught fan and desulfurizing tower are connected in proper order through the smoke pipe, the smoke pipe between the activated carbon powder feeder output and spark interceptor and cloth bag dust collector is connected. The utility model can reduce the emission of harmful substance greatly, reduce pollution, protect the environment, reach the environmental protection emission standard.

Description

Technical Field

[0001] This utility model relates to the field of cremator technology, specifically to an environmentally friendly dust removal system using SCR technology for cremators. Background Technology

[0002] A cremator is a device used to cremate remains; it is a type of incinerator. A traditional cremator typically consists of a main combustion chamber and a secondary combustion chamber. The main combustion chamber is constructed primarily of refractory bricks of various shapes, while the secondary combustion chamber is located below, above, or to the side of the main combustion chamber.

[0003] Existing crematoriums still have many shortcomings in use. For example, the temperature field in the main combustion chamber is uneven, resulting in high energy consumption during the cremation process. The secondary combustion chamber is generally small, and the flue gas residence time is insufficient, making it difficult to ensure that dioxins and carbon monoxide emissions meet the standards. However, in order to ensure the residence time in the secondary combustion chamber, the overall size of the crematorium is often increased significantly, resulting in a substantial increase in cost and volume. Utility Model Content

[0004] To address the technical problems of substandard emissions and difficult treatment of flue gas from existing crematoriums, this utility model provides an environmentally friendly dust removal system using SCR technology for crematoriums. This system removes dust, desulfurizes, and denitrates the flue gas from crematoriums, significantly reducing harmful gas emissions and making the system more environmentally friendly.

[0005] The technical solution adopted by this utility model is to provide an environmentally friendly dust removal system for SCR technology in a cremator, including a cremator, and further including a rapid cooling radiator, a cyclone dust collector, a spark interceptor, a bag filter, an SCR heating furnace, an SCR catalytic reactor, a variable frequency exhaust fan and a desulfurization tower connected in sequence to the flue gas outlet of the cremator, as well as an activated carbon powder feeder set between the spark interceptor and the bag filter.

[0006] An underground flue is provided between the exhaust port of the cremator and the quench radiator. The quench radiator, cyclone dust collector, spark interceptor, bag filter, SCR heating furnace, SCR catalytic reactor, variable frequency exhaust fan and desulfurization tower are connected in sequence through a flue gas supply pipe. The output end of the activated carbon powder feeder is connected to the flue gas supply pipe between the spark interceptor and the bag filter.

[0007] The cremator includes a body, a first combustion chamber, a second combustion chamber, and a third combustion chamber arranged sequentially from bottom to top within the body, a first flue located between the first and second combustion chambers, a second flue located between the second and third combustion chambers, and a third flue located in the third combustion chamber and connected to an underground flue.

[0008] The first, second, and third flues are vertically staggered. The first flue is located inside the inner wall of the first and second combustion chambers, with its input end connected to the first combustion chamber and its output end connected to the second combustion chamber. The second flue is located inside the inner wall of the second and third combustion chambers, with its input end connected to the second combustion chamber and its output end connected to the third combustion chamber. The third flue has its input end connected to the third combustion chamber and its output end connected to the input end of the underground flue.

[0009] The first flue input end is located at the upper part of the first combustion chamber and the output end is located at the lower part of the second combustion chamber. The second flue input end is located at the upper part of the second combustion chamber and the output end is located at the lower part of the third combustion chamber. The third flue input end is located at the upper part of the third combustion chamber and the output end is located at the lower end of the engine body.

[0010] The beneficial effects of this utility model are that it provides an environmentally friendly dust removal system for cremator using SCR technology. The cremator adopts a three-combustion chamber structure to ensure complete combustion and pyrolysis of flue gas. Combined with cyclone dust removal, bag dust removal, activated carbon adsorption, SCR catalytic denitrification and desulfurization tower, it achieves efficient dust removal, denitrification and desulfurization, significantly reducing the emission of harmful substances, reducing pollution, protecting the environment and meeting environmental emission standards. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the system structure of this utility model;

[0012] Figure 2 This is a cross-sectional structural diagram of the cremator of this utility model.

[0013] In the attached diagram, 1 is the cremator, 2 is the quench radiator, 3 is the cyclone dust collector, 4 is the spark interceptor, 5 is the bag filter dust collector, 6 is the SCR heating furnace, 7 is the SCR catalytic reactor, 8 is the variable frequency exhaust fan, 9 is the desulfurization tower, 10 is the activated carbon powder feeder, 11 is the underground flue, 12 is the machine body, 13 is the first combustion chamber, 14 is the second combustion chamber, 15 is the third combustion chamber, 16 is the first flue, 17 is the second flue, and 18 is the third flue. Detailed Implementation

[0014] like Figure 1-2As shown, this utility model provides an environmentally friendly dust removal system for SCR technology in a cremator, including a cremator 1, and further including a rapid cooling radiator 2, a cyclone dust collector 3, a spark interceptor 4, a bag filter 5, an SCR heating furnace 6, an SCR catalytic reactor 7, a variable frequency exhaust fan 8, and a desulfurization tower 9, all connected in sequence to the flue gas outlet of the cremator 1, and an activated carbon powder feeder 10 disposed between the spark interceptor 4 and the bag filter 5; an underground flue 11 is provided between the flue gas outlet of the cremator 1 and the rapid cooling radiator 2, and the rapid cooling radiator 2, cyclone dust collector 3, spark interceptor 4, bag filter 5, SCR heating furnace 6, SCR catalytic reactor 7, variable frequency exhaust fan 8, and desulfurization tower 9 are connected in sequence through a flue gas supply pipe, and the output end of the activated carbon powder feeder 10 is connected to the flue gas supply pipe between the spark interceptor 4 and the bag filter 5.

[0015] During the cremation process, the cremator produces flue gas containing high-temperature gases and harmful gases, such as carbon dioxide, nitrogen oxides, heavy metals, and organic compounds. The flue gas from cremator 1 is transported to the quench radiator 2 through the underground flue 11 for heat dissipation and heat exchange, thereby reducing the flue gas temperature. The underground flue 11 is constructed of high-temperature resistant sulfate bricks and refractory cast integrated blocks. The underground flue 11 transports the high-temperature flue gas that has just come out of cremator 1, resulting in better fire resistance and a longer service life. After cooling, the flue gas passes through the flue gas delivery pipe in sequence through the cyclone dust collector 3, spark interceptor 4, bag filter 5, SCR heating furnace 6, SCR catalytic reactor 7, variable frequency exhaust fan 8, and desulfurization tower 9 before being discharged. The flow of flue gas in the underground flue 11 and the flue gas delivery pipe is driven by negative pressure by the variable frequency exhaust fan 8. The flue gas flow rate can be controlled by controlling the suction size of the variable frequency exhaust fan 8.

[0016] The cyclone dust collector 3 uses high-speed rotating airflow to generate centrifugal force, causing large particles in the airflow to be forcefully thrown against the outer wall, such as incompletely burned dust and fly ash, which then settle downwards into the collection tank. This process effectively removes large particulate pollutants from the exhaust gas; its purpose is to perform preliminary filtration of the flue gas, reduce the particulate load in the exhaust gas, and reduce the pressure on subsequent treatment equipment; it not only helps improve system efficiency but also extends the service life of the equipment.

[0017] Spark interceptor 4 is a device used to reduce or prevent sparks, smoke, and harmful substances generated during the cremation process. During the operation of the cremator 1, especially in the high-temperature combustion stage, sparks or incompletely combusted residues are produced. Spark interceptor 4, through multi-layer filtration and electrostatic adsorption, effectively traps sparks, dust, and other fine particles in the exhaust gas, purifying the flue gas.

[0018] The baghouse dust collector 5 removes particulate matter, solid dioxins, and acidic substances from flue gas using bag filtration technology. Before the flue gas enters the baghouse dust collector 5, activated carbon powder is injected by the activated carbon powder feeder 10 to adsorb particulate matter in the flue gas. The activated carbon powder, particulate matter, dust, and other pollutants in the flue gas are further filtered by the baghouse dust collector 5. The filter bags of the baghouse dust collector 5 can effectively trap large particulate matter in the flue gas, especially dust and particulate pollutants. After filtration by the filter bags, particles larger than 3 micrometers are intercepted, effectively reducing the particulate matter content in the flue gas.

[0019] The SCR heating furnace 6 is used to increase the flue gas temperature, ensuring that the flue gas reaches a suitable temperature of 250-450℃ before the SCR catalytic reaction.

[0020] The SCR catalytic reactor 7 uses a reducing agent to react with NOx in flue gas, converting it into harmless N2 and H2O. The SCR reaction requires a catalyst to accelerate the reaction between NOx and the reducing agent. The reducing agent is an aqueous solution of ammonia or urea, and the catalyst is typically made of titanium-based or vanadium-based materials, effectively promoting the reduction of NOx. After the SCR catalytic reaction, the concentration of NOx in the flue gas is significantly reduced, thereby effectively reducing pollutant emissions and meeting environmental emission requirements.

[0021] Desulfurization tower 9 is used to remove sulfur dioxide from flue gas. It uses absorption or chemical reaction to react the flue gas with an absorbent, such as sodium hydroxide or limestone, thereby converting sulfur dioxide into harmless substances.

[0022] like Figure 2 As shown, the cremator 1 includes a body 12, a first combustion chamber 13, a second combustion chamber 14, and a third combustion chamber 15 arranged sequentially from bottom to top within the body 12, a first flue 16 disposed between the first combustion chamber 13 and the second combustion chamber 14, a second flue 17 disposed between the second combustion chamber 14 and the third combustion chamber 15, and a third flue 18 disposed in the third combustion chamber 15 and connected to an underground flue 11; the first flue 16, the second flue 17, and the third flue 18 are vertically staggered, the first flue 16 is located within the inner wall of the first combustion chamber 13 and the second combustion chamber 14, and the input end of the first flue 16 is connected to the first combustion chamber 13, and the output end is connected to the second combustion chamber 14; the second flue 17 is disposed within the inner wall of the second combustion chamber 14 and the third combustion chamber 15, and the input end of the second flue 17 is connected to the second combustion chamber 14, and the output end is connected to the third combustion chamber 15; the third flue 18 is connected to the third combustion chamber 15, and the output end is connected to the input end of the underground flue 11.

[0023] The cremator of this invention has a three-chamber structure (upper, middle, and lower) and is constructed from high-temperature resistant sulfate bricks and refractory castable blocks. The temperature in the first combustion chamber 13 can reach 800°C to over 1000°C, the temperature in the second combustion chamber 14 can reach 800-1000°C, and the temperature in the third combustion chamber 15 can reach 800-1200°C, to ensure that the remains can be completely cremated and that the carbon monoxide in the flue gas can be completely decomposed.

[0024] The first combustion chamber 13 of the cremator 1 serves as the main combustion chamber. The flue gas generated enters the second combustion chamber 14 through the first flue 16 for secondary combustion, and then enters the third combustion chamber 15 through the second flue 17 for complete combustion. Ammonia water is sprayed in the third combustion chamber 15 for preliminary denitrification. After that, the flue gas enters the underground flue 11 through the third flue 18.

[0025] like Figure 2 As shown, the input end of the first flue 16 is located at the upper part of the first combustion chamber 13 and the output end is located at the lower part of the second combustion chamber 14; the input end of the second flue 17 is located at the upper part of the second combustion chamber 14 and the output end is located at the lower part of the third combustion chamber 15; and the input end of the third flue 18 is located at the upper part of the third combustion chamber 15 and the output end is located at the lower end of the body 12.

[0026] The inlet and outlet positions of the first flue 16, the second flue 17, and the third flue 18 are defined to make the flue gas flow more smoothly and allow it to stay briefly in the current chamber, ensuring time for secondary combustion and preliminary catalytic denitrification.

Claims

1. An environmentally friendly dust removal system using SCR technology for crematoriums, comprising a crematorium (1), characterized in that: It also includes a rapid cooling radiator (2), a cyclone dust collector (3), a spark interceptor (4), a bag filter (5), an SCR heating furnace (6), an SCR catalytic reactor (7), a variable frequency exhaust fan (8), and a desulfurization tower (9) connected in sequence to the flue gas outlet of the cremator (1), as well as an activated carbon powder feeder (10) set between the spark interceptor (4) and the bag filter (5); An underground flue (11) is provided between the exhaust port of the cremator (1) and the quench radiator (2). The quench radiator (2), cyclone dust collector (3), spark interceptor (4), bag dust collector (5), SCR heating furnace (6), SCR catalytic reactor (7), variable frequency exhaust fan (8) and desulfurization tower (9) are connected in sequence through a flue pipe. The output end of the activated carbon powder feeder (10) is connected to the flue pipe between the spark interceptor (4) and the bag dust collector (5).

2. The environmentally friendly dust removal system for crematoriums using SCR technology according to claim 1, characterized in that: The cremator (1) includes a body (12), a first combustion chamber (13), a second combustion chamber (14) and a third combustion chamber (15) arranged sequentially from bottom to top within the body (12), a first flue (16) arranged between the first combustion chamber (13) and the second combustion chamber (14), a second flue (17) arranged between the second combustion chamber (14) and the third combustion chamber (15), and a third flue (18) arranged in the third combustion chamber (15) and connected to the underground flue (11). The first flue (16), the second flue (17), and the third flue (18) are vertically staggered. The first flue (16) is located inside the inner wall of the first combustion chamber (13) and the second combustion chamber (14), and the input end of the first flue (16) is connected to the first combustion chamber (13) and the output end is connected to the second combustion chamber (14). The second flue (17) is located inside the inner wall of the second combustion chamber (14) and the third combustion chamber (15), and the input end of the second flue (17) is connected to the second combustion chamber (14) and the output end is connected to the third combustion chamber (15). The input end of the third flue (18) is connected to the third combustion chamber (15) and the output end is connected to the input end of the underground flue (11).

3. The environmentally friendly dust removal system for crematorium SCR technology according to claim 2, characterized in that: The first flue (16) has its input end located at the upper part of the first combustion chamber (13) and its output end located at the lower part of the second combustion chamber (14). The second flue (17) has its input end located at the upper part of the second combustion chamber (14) and its output end located at the lower part of the third combustion chamber (15). The third flue (18) has its input end located at the upper part of the third combustion chamber (15) and its output end located at the lower end of the engine body (12).

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