Carbonization furnace carbonization tail gas treatment device

Abstract

The utility model discloses a carbonization tail gas treatment device of a carbonization furnace, which relates to the technical field of tail gas treatment devices and comprises a heat energy recovery bin, the side wall of the heat energy recovery bin is hermetically connected with a heat energy recycling unit, and a lower end opening of the heat energy recovery bin is hermetically connected with a tail gas port of the carbonization furnace. An upper end opening of the heat energy recovery bin is hermetically connected with the spraying unit; a lower-end water outlet of the spraying unit is hermetically connected with an upper-end opening of the collecting pipe, and a lower-end opening of the collecting pipe is hermetically connected with the liquid storage tank; an upper exhaust port of the spraying unit is communicated with an inlet of the condenser, an outlet of the condenser is communicated with an inlet of the high-voltage electric field bin, and an outlet of the high-voltage electric field bin is communicated with the activated carbon adsorption bin. The carbonization tail gas treatment device of the carbonization furnace not only can realize the effects of energy conservation and emission reduction, but also can reduce the shutdown maintenance time and improve the tail gas treatment effect.

Description

TECHNICAL FIELD

[0001] The utility model relates to tail gas treatment device technical field especially relates to a carbonization furnace carbonization tail gas treatment device. BACKGROUND

[0002] Carbonization furnace tail gas refers to the gas produced and discharged during carbonization reaction in the carbonization furnace, which usually contains the following characteristics:

[0003] Complex composition: carbon dioxide, nitrogen and other non-combustible gases, and organic pollutants such as tar, phenols and benzene, which are generated by incomplete decomposition or complex chemical reactions of organic matter in raw materials during carbonization, can harm the environment and human health, and may contain sulfides such as hydrogen sulfide, which can produce a pungent odor and have corrosive and toxic properties, and can form acidic substances under certain conditions, which can corrode pipes and equipment and reduce the service life of equipment and increase maintenance costs;

[0004] High temperature: the reaction in the carbonization furnace is usually carried out at high temperature, generally reaching several hundred degrees Celsius or even higher, so the temperature of the exhaust gas is also high, usually between 200-800℃, the specific temperature depends on the type of carbonization furnace, process and operating conditions, etc. Direct discharge of high-temperature exhaust gas not only wastes energy, but also can have a thermal impact on the surrounding environment and equipment;

[0005] High dust content: during the carbonization process, the crushing, grinding and movement of materials during the reaction process can generate a large amount of dust, which can affect the normal operation of subsequent treatment equipment and pollute the air quality;

[0006] Flammable and explosive: due to the presence of flammable gases in the exhaust gas, when these gases mix with air to a certain concentration range in a certain space, they can easily burn or even explode when exposed to fire or high temperature, posing a significant safety hazard.

[0007] The existing tail gas treatment device does not fully recover and utilize the heat energy in the tail gas during the treatment process, resulting in waste of heat energy in the tail gas, and the removal effect of dust and tar is poor, and the active carbon adsorption layer is easily blocked during actual operation, affecting the service life of the device.

[0008] How to develop a carbonization furnace carbonization tail gas treatment device to fully recover and utilize the heat energy in the tail gas and improve the treatment effect of the tail gas, achieve energy saving and emission reduction, improve the service life and reduce downtime maintenance time, has become a technical problem to be solved by technical personnel in the field. UTILITY MODEL CONTENT

[0009] The utility model discloses a carbonization furnace carbonization tail gas treatment device, solve the problem in the background art listed.

[0010] To solve the above technical problems, the utility model adopts the following technical scheme:

[0011] The utility model discloses a carbonization furnace carbonization tail gas treatment device, including heat energy recovery storehouse, the lateral wall of heat energy recovery storehouse is sealedly connected with heat energy recycling unit, and the lower end opening of heat energy recovery storehouse is sealedly connected with the tail gas port of carbonization furnace, and the upper end opening of heat energy recovery storehouse is sealedly connected with the spraying unit.

[0012] The lower end water outlet of the spraying unit is sealedly connected with the upper end opening of the collecting pipe, and the lower end opening of the collecting pipe is sealedly connected with the liquid storage tank.

[0013] The upper end gas outlet of the spraying unit is communicated with the inlet of the condenser, the outlet of the condenser is communicated with the inlet of the high-voltage electric field bin, and the outlet of the high-voltage electric field bin is communicated with the activated carbon adsorption bin.

[0014] Preferably, the shape of the heat energy recovery storehouse is shuttle-shaped.

[0015] Preferably, the heat energy recycling unit includes a water tank and a turbine, a water pump is installed inside the water tank, and the water outlet of the water pump is communicated with the water inlet of the spiral pipe.

[0016] The steam outlet of the spiral pipe is communicated with the turbine through a spray pipe.

[0017] The turbine is electrically connected with a power supply.

[0018] The turbine is communicated with the water tank through a backwater pipe.

[0019] Preferably, the spiral pipe is installed inside the heat energy recovery storehouse, and the center line of the spiral pipe coincides with the axis of the heat energy recovery storehouse.

[0020] Preferably, the spraying unit includes an air inlet pipe and an aeration disc, the air inlet pipe is communicated with the bottom side wall of the spraying bin.

[0021] The aeration disc is installed inside the spraying bin, and the aeration disc is communicated with the air inlet pipe.

[0022] A liquid inlet pipe is communicated on the upper end side wall of the spraying bin, and the liquid inlet pipe extends into the interior of the spraying bin, and a spray head is installed at the end of the liquid inlet pipe.

[0023] Preferably, the opening direction of the aeration disc corresponds to the opening direction of the spray head.

[0024] Preferably, the inner walls of the collecting pipe and the liquid storage tank are coated with an anticorrosive coating.

[0025] Compared with the prior art, the beneficial technical effects of the carbonization furnace carbonization tail gas treatment device are as follows:

[0026] The carbonization furnace carbonization tail gas treatment device makes the high-temperature tail gas contact with the heat energy recycling unit in advance in the heat energy recycling bin, can realize preliminary cooling of the high-temperature tail gas on one hand, and can realize recycling of the temperature in the high-temperature tail gas through gas-liquid phase change in the heat energy recycling unit, store the temperature in the form of electric energy, and provide a power source for subsequent processes to realize utilization of the temperature in the tail gas, realize the effect of energy saving and emission reduction; further, the tail gas after preliminary cooling enters the spraying unit, can not only realize spraying cooling, but also can remove most of the tar and dust in the tail gas, reduce the working pressure of the high-voltage electric field bin and the activated carbon adsorption bin, and effectively improve the service life of the high-voltage electric field bin and the activated carbon adsorption bin, reduce downtime maintenance time. BRIEF DESCRIPTION OF DRAWINGS

[0027] The utility model will be further described in connection with the drawings.

[0028] Figure 1 It is a sectional view schematic diagram of the carbonization furnace carbonization tail gas treatment device.

[0029] Mark 1, heat energy recycling bin; 2, heat energy recycling unit; 201, water tank; 202, water pump; 203, backwater pipe; 204, power supply; 205, turbine; 3, spraying unit; 301, air inlet pipe; 302, aeration disc; 303, spraying bin; 304, spray head; 305, liquid inlet pipe; 4, collection pipe; 5, liquid storage tank; 6, condenser; 7, high-voltage electric field bin; 8, activated carbon adsorption bin. DETAILED DESCRIPTION

[0030] In order to make the technical problems, technical schemes and beneficial effects to be solved by the utility model more clear and obvious, the utility model will be further described in connection with the drawings and examples. It should be understood that the specific examples described herein are only used to explain the utility model, and are not used to limit the utility model.

[0031] As shown in Figure 1 A carbonization furnace carbonization tail gas treatment device, comprising a heat energy recycling bin 1, the side wall of the heat energy recycling bin 1 is sealingly connected with a heat energy recycling unit 2, the lower end opening of the heat energy recycling bin 1 is sealingly connected with a tail gas port of a carbonization furnace, and the upper end opening of the heat energy recycling bin 1 is sealingly connected with a spraying unit 3;

[0032] The lower end water outlet of the spraying unit 3 is sealingly connected with the upper end opening of a collection pipe 4, and the lower end opening of the collection pipe 4 is sealingly connected with a liquid storage tank 5;

[0033] The upper end exhaust port of the spraying unit 3 is in communication with the inlet of the condenser 6, the outlet of the condenser 6 is in communication with the inlet of the high-voltage electric field bin 7, and the outlet of the high-voltage electric field bin 7 is in communication with the activated carbon adsorption bin 8;

[0034] In operation, the high-temperature tail gas is pre-contacted with the heat energy recycling unit in the heat energy recycling bin, which can not only realize the preliminary cooling of the high-temperature tail gas, but also realize the recycling of the temperature in the high-temperature tail gas through the gas-liquid phase change in the heat energy recycling unit, store the electricity in the form of electricity, and provide the power source for the subsequent process to realize the utilization of the temperature in the tail gas, thereby achieving the effect of energy saving and emission reduction.

[0035] Further, the tail gas after preliminary cooling enters the spraying unit, which can not only realize spraying cooling, but also remove tar and most of the dust in the tail gas, reduce the working pressure of the high-voltage electric field bin and the activated carbon adsorption bin, and effectively improve the service life of the high-voltage electric field bin and the activated carbon adsorption bin, thereby reducing the downtime maintenance time.

[0036] The activated carbon adsorption bin can adsorb benzene, aldehyde ketone, alcohol, hydrocarbon and other substances in the tail gas, and also has excellent adsorption capacity for inorganic gases such as SO2, NO, Cl2, HS and CO2 in the tail gas due to the wide pore size range of activated carbon, thereby ensuring that the tail gas emission meets the standard.

[0037] Specifically, the heat energy recycling bin 1 is in the shape of a shuttle, which is convenient for prolonging the residence time of the high-temperature tail gas in the heat energy recycling bin, facilitating the contact of the high-temperature tail gas with the heat energy recycling unit, and making the heat energy recycling unit warm up to realize the phase change.

[0038] Specifically, the heat energy recycling unit 2 includes a water tank 201 and a turbine 205, and a water pump 202 is installed inside the water tank 201, and the water outlet of the water pump 202 is in communication with the water inlet of a spiral pipe 207.

[0039] The steam outlet of the spiral pipe 207 is in communication with the turbine 205 through a nozzle 206.

[0040] The turbine 205 is electrically connected with a power supply 204.

[0041] The turbine 205 is in communication with the water tank 201 through a backwater pipe 203.

[0042] Specifically, the spiral pipe 207 is installed inside the heat energy recycling bin 1, and the center line of the spiral pipe 207 coincides with the axis of the heat energy recycling bin 1.

[0043] In operation, the water tank pumps water into the spiral pipe through the water pump, and further, the spiral pipe in the heat energy recovery bin is heated by the high-temperature tail gas, the cooling water in the spiral pipe is vaporized to form steam, the steam is accelerated through the nozzle to drive the turbine to rotate and generate electricity, and the generated electricity is stored in the power supply for standby.

[0044] Specifically, the spraying unit 3 comprises an air inlet pipe 301 and an aeration disc 302, the air inlet pipe 301 is in communication with the bottom sidewall of the spraying bin 303;

[0045] The aeration disc 302 is installed in the interior of the spraying bin 303, and the aeration disc 302 is in communication with the air inlet pipe 301;

[0046] The upper end sidewall of the spraying bin 303 is communicated with a liquid inlet pipe 305, the liquid inlet pipe 305 extends into the interior of the spraying bin 303, and a nozzle 304 is installed at the end of the liquid inlet pipe 305; the aeration disc 302 corresponds to the opening direction of the nozzle 304;

[0047] In operation, the tail gas after preliminary cooling is uniformly distributed in the spraying bin through the aeration disc, the tail gas moves from bottom to top in the spraying bin, the liquid enters from the liquid inlet pipe, and the liquid is changed into liquid droplets under the action of the nozzle, and the liquid droplets fall from top to bottom to remove the tar in the tail gas through the water washing method;

[0048] Further, the liquid can be a dilute alkali solution, which is convenient for removing organic acids, tar and other organic matters in the tail gas;

[0049] At the same time, most of the dust in the tail gas can be removed under the action of spraying.

[0050] Specifically, the collecting pipe 4 and the inner wall of the liquid storage tank 5 are coated with an anticorrosive coating to prevent corrosion of the collecting pipe and the liquid storage tank by the wastewater.

[0051] The condenser can remove the water in the tail gas after spraying, and further cool the treated tail gas, and create a temperature and humidity environment for the dust removal of the high-voltage electric field bin;

[0052] The high-voltage electric field bin ionizes the tail gas by,

[0053] On the one hand, the tar droplets and gaseous / liquid smoke remaining in the tail gas can be effectively removed, most of the tar particles are negatively charged and adsorbed on the surface of the precipitation electrode along the direction of the electric line, and the charged particles become medium-sized oil particles, the oil mist particles continuously condense on the surface of the electrode plate, the particles increase, and finally become oil droplets which flow along the surface of the precipitation electrode to the bottom of the equipment and are discharged through the blowdown port;

[0054] On the other hand, the dust in the exhaust gas is electrified to separate from the airflow under the action of the electric field, and dust removal is realized.

[0055] Further, the electric energy in the power supply can supply power to the high-voltage electric field bin, reducing energy consumption.

[0056] It should be noted that in this paper, relational terms such as first and second are used merely to distinguish one entity or action from another, and do not necessarily require or imply that these entities or actions are in any way mutually exclusive or in any specific order.

[0057] The above-described embodiments are only to describe the preferred mode of the present application, and not to limit the scope of the present application, without departing from the design spirit of the present application, various modifications and improvements of the technical scheme of the present application made by those skilled in the art shall fall within the protection scope determined by the claims of the present application.

Claims

1. A carbonization furnace carbonization tail gas treatment device, characterized by: The heat energy recycling bin (1) is sealedly connected with a heat energy recycling unit (2), the lower end opening of the heat energy recycling bin (1) is sealedly connected with a tail gas outlet of a carbonization furnace, and the upper end opening of the heat energy recycling bin (1) is sealedly connected with a spraying unit (3); The lower end water outlet of the spraying unit (3) is sealedly connected with the upper end opening of a collecting pipe (4), and the lower end opening of the collecting pipe (4) is sealedly connected with a liquid storage tank (5); The upper end exhaust port of the spraying unit (3) is communicated with the inlet of a condenser (6), the outlet of the condenser (6) is communicated with the inlet of a high-voltage electric field bin (7), and the outlet of the high-voltage electric field bin (7) is communicated with an activated carbon adsorption bin (8).

2. A carbonization furnace off-gas treatment device according to claim 1, characterized by: The heat energy recycling bin (1) is in the shape of a shuttle.

3. A carbonization furnace off-gas treatment device according to claim 2, characterized by: The heat energy recycling unit (2) comprises a water tank (201) and a turbine (205), the inside of the water tank (201) is provided with a water pump (202), the water outlet of the water pump (202) is communicated with the water inlet of a spiral pipe (207); The steam outlet of the spiral pipe (207) is communicated with the turbine (205) through a nozzle (206); The turbine (205) is electrically connected with a power supply (204); The turbine (205) is communicated with the water tank (201) through a backwater pipe (203).

4. The carbonization furnace off-gas treatment device according to claim 3, characterized by: The spiral pipe (207) is installed in the inside of the heat energy recycling bin (1), and the center line of the spiral pipe (207) coincides with the axis of the heat energy recycling bin (1).

5. A carbonization furnace off-gas treatment device according to claim 4, characterized by: The spraying unit (3) comprises an air inlet pipe (301) and an aeration disc (302), the air inlet pipe (301) is communicated with the bottom side wall of a spraying bin (303); The aeration disc (302) is installed in the inside of the spraying bin (303), and the aeration disc (302) is communicated with the air inlet pipe (301); The upper end side wall of the spraying bin (303) is communicated with a liquid inlet pipe (305), the liquid inlet pipe (305) extends into the inside of the spraying bin (303), and the end of the liquid inlet pipe (305) is provided with a spray head (304).

6. A carbonization furnace off-gas treatment device according to claim 5, characterized by: The aeration disc (302) corresponds to the opening direction of the spray head (304).

7. A carbonization furnace off-gas treatment device according to claim 6, characterized by: The inner walls of the collecting pipe (4) and the liquid storage tank (5) are coated with an anticorrosive coating.

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