Environment-friendly flue gas treatment device for waste incineration

Abstract

The invention provides an environment-friendly flue gas treatment device for waste incineration, and belongs to the technical field of flue gas treatment.The environment-friendly flue gas treatment device for waste incineration comprises an inertia separator used for conducting inertia separation on flue gas and a bag-type dust removal system used for conducting bag-type dust removal on the flue gas, a gas inlet of the inertia separator communicates with a gas inlet flue, and a gas outlet of the inertia separator communicates with a gas outlet flue; a gas inlet of the gas inlet flue is communicated with the smoke exhaust end of the boiler, a gas exhaust port of the inertia separator is communicated with a gas exhaust flue, and a gas exhaust port of the gas exhaust flue is communicated with a bag dust removal system. The flue gas treatment system further comprises a short-circuit bypass flue used for being communicated with the gas inlet flue and the gas exhaust flue, the two ends of the short-circuit bypass flue are connected with the gas inlet flue and the gas exhaust flue respectively, and an opening adjusting device used for controlling the flow area of the short-circuit bypass flue is arranged in the short-circuit bypass flue. The technical problem that the pressure of a flue pipeline system is increased due to the fact that all flue gas in a gas inlet flue passes through an inertia separator and then flows outwards is solved, separation, dust removal and the like of the flue gas are flexible and controllable, adjustment is more flexible, and adaptability is higher.

Description

Technical Field

[0001] The present invention belongs to the technical field of flue gas treatment, and in particular relates to an environmentally friendly flue gas treatment device for garbage incineration. Background Art

[0002] Waste incineration is the process of reducing the volume of waste through oxidation at high temperature through appropriate thermal decomposition, combustion, melting and other reactions, turning it into residue or molten solid matter.

[0003] The patent with patent announcement number CN214209944U relates to a waste incineration flue gas treatment device, including an incinerator and a treatment tank, one end of the incinerator is provided with an inclined surface, the upper end surface of the inclined surface is provided with a blocking cover, and the blocking cover is movably connected to the incinerator through a hinge, and the end of the incinerator away from the blocking cover is provided with an exhaust pipe, the end of the exhaust pipe away from the incinerator is provided with a treatment tank, the end of the treatment tank away from the exhaust pipe is provided with a drain pipe, and the end of the drain pipe away from the treatment tank is provided with a water inlet pipe, and the drain pipe and the water inlet pipe are both connected to the treatment tank by interference fit, and the end of the water inlet pipe away from the drain pipe is centrally provided with an exhaust pipe, and one end of the drain pipe is provided with a water pump, the water pump is plugged and fixed to the drain pipe, and the end of the water pump away from the drain pipe is provided with an electromagnetic valve, and the electromagnetic valve and the water pump are electrically connected by a wire. The waste incineration flue gas treatment device is easy to use and convenient to filter, and it is recommended to be promoted and used.

[0004] The above patent is easy to use and filters conveniently, and is recommended for promotion and use. However, the flue gas may not be effectively covered during the spraying process, which may result in a large amount of flue gas failing to be effectively sprayed, causing the particles in the flue gas to adhere to the filter system, resulting in a reduction in the filtering effect of the filter system. Summary of the Invention

[0005] The present invention addresses the problems of the prior art and adopts the following technical solution: an environmentally friendly flue gas treatment device for waste incineration, comprising: an inertial separator for inertial separation of flue gas, and a bag dust removal system for bag dust removal of flue gas. The air inlet of the inertial separator is connected to an air inlet flue, the air inlet of the air inlet flue is connected to the flue exhaust end of the boiler, and the exhaust port of the inertial separator is connected to an exhaust flue, the exhaust port of the exhaust flue is connected to the bag dust removal system. The flue gas treatment system also includes a short-circuit bypass flue for connecting the air inlet flue and the exhaust flue, the two ends of the short-circuit bypass flue are respectively connected to the air inlet flue and the exhaust flue, and the short-circuit bypass flue is provided with an opening adjustment device for controlling the size of its flow area.

[0006] Inertial separators, also known as momentum separators, utilize the inertia of particles or droplets entrained in an airflow to achieve separation. An obstacle is placed in the gas flow path. As the airflow passes around the obstacle, it suddenly turns, causing the particles or droplets to impact and be collected. Inertial separators operate similarly to cyclonic separators: the greater the particle inertia and the smaller the radius of curvature at the airflow turn, the higher their efficiency. Therefore, the greater the particle density and diameter, the easier it is to separate. Appropriately increasing the airflow velocity and reducing the radius of curvature at the turn also help improve efficiency.

[0007] The bag filter system is a dry dust removal device suitable for capturing fine, dry, non-fibrous dust. The filter bags are made of textile filter cloth or non-woven felt, and utilize the filtration effect of the fiber fabric to filter the dust-laden gas. When the dust-laden gas enters the bag filter, the large particles with high specific gravity settle due to gravity and fall into the ash hopper. The gas containing finer dust is retained when passing through the filter material, thus purifying the gas.

[0008] The opening adjustment device includes a drive motor, a drive shaft connected to the output of the drive motor, and a connecting rod unit. The on-off valve has a connecting portion, a rotating portion, and a regulating valve. The connecting rod unit has a drive end with a hub connected to the drive shaft and a hinged end rotatably connected to the connecting portion. Thus, the output of the drive motor drives the drive shaft to rotate, causing the drive end of the connecting rod unit to rotate, thereby driving the on-off valve at the hinged end to swing, thereby adjusting the opening.

[0009] During operation, the flue gas generated by the combustion of biomass fuel in the stove enters the flue. Through the action of the flue, the soot in the flue gas is deposited in the flue, and through the action of the inertial separator arranged in the flue, the coarser soot enters the multi-tube dust removal system, and the finer soot enters the bag dust removal system. The soot in the bag dust removal system is then separated by the bag dust removal system. The finer soot is filtered with water and discharged into the atmosphere through the chimney, while the coarser soot is retained in the bag dust removal system.

[0010] Compared with the prior art, the advantages and positive effects of the present invention are: The present invention provides an environmentally friendly flue gas treatment device for waste incineration, comprising: an inertial separator for inertial separation of flue gas, and a bag dust removal system for bag dust removal of flue gas. By setting a short-circuited bypass flue and an opening adjustment device, the direction and diversion of the flue gas in the intake flue can be flexibly adjusted, thereby solving the technical problem of increased pressure in the flue pipe system caused by the flue gas in the intake flue passing through the inertial separator before going out. The separation and dust removal of the flue gas are flexible and controllable, solving the problem of ash transport in the flue gas treatment system pipeline. The technical problem of poor flow is solved, which reduces the pressure difference before and after each ash delivery circuit, improves the ash delivery efficiency, and makes the entire generator set operate stably and reliably. It can also effectively reduce the current of the induced draft unit at the delivery outlet, reduce the workload of the induced draft unit, inertial separator, etc., improve service life, and reduce the cost required for ash delivery. On the other hand, the opening adjustment device can flexibly adjust the size of the short-circuit bypass flue flow, and the opening adjustment device can flexibly adjust the opening size of the exhaust flue between the inertial separator and the short-circuit bypass flue, with more flexible adjustment and stronger adaptability. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following is a brief introduction to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0012] Figure 1 This is a schematic structural diagram of an environmentally friendly waste incineration flue gas treatment device according to the present invention; Figure 2 It is a structural diagram of the opening adjustment device; In the above figures, 1. Inertial separator; 2. Bag dust removal system; 3. Opening adjustment device; 721. Rotating part; 722. Regulating valve; 723. Connecting part; 731. Driving motor; 732. Driving shaft; 733. Connecting rod unit. DETAILED DESCRIPTION

[0013] In order to more clearly understand the above-mentioned objects, features and advantages of the present invention, the present invention is further described below in conjunction with the accompanying drawings and embodiments. It should be noted that the embodiments of the present application and the features therein can be combined with each other without conflict.

[0014] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways than those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0015] Example 1, as Figures 1-2 As shown, the present application provides an environmentally friendly flue gas treatment device for waste incineration, comprising: an inertial separator 1 for inertial separation of flue gas, and a bag dust removal system 2 for bag dust removal of flue gas. The air inlet of the inertial separator 1 is connected to an air inlet flue, the air inlet of the air inlet flue is connected to the flue gas exhaust end of the boiler, and the exhaust port of the inertial separator 1 is connected to an exhaust flue, the exhaust port of the exhaust flue is connected to the bag dust removal system 2. The flue gas treatment system also includes a short-circuit bypass flue for connecting the air inlet flue and the exhaust flue, the two ends of the short-circuit bypass flue are respectively connected to the air inlet flue and the exhaust flue, and the short-circuit bypass flue is provided with an opening adjustment device 3 for controlling the size of its flow area.

[0016] Inertial separators, also known as momentum separators, use the inertia of particles or droplets entrained in the airflow to achieve separation. By placing an obstacle in the path of the gas flow, the airflow suddenly turns as it passes around the obstacle, causing the particles or droplets to collide with the obstacle and be collected.

[0017] The principle behind inertial separator 1 is similar to that of a cyclone separator: the greater the particle inertia and the smaller the radius of curvature at the airflow turning point, the higher its efficiency. Therefore, the greater the particle density and diameter, the easier it is to separate. Appropriately increasing the airflow velocity and reducing the radius of curvature at the turning point also help improve efficiency. Generally speaking, inertial separator 1 is slightly more efficient than a dust chamber, effectively capturing particles larger than 10 μm with a resistance of 100 to 1000 Pa, making it suitable for use as a pre-dust collector.

[0018] The separator can also be filled with loose, fibrous material instead of rigid baffles. In this case, sedimentation, inertia, and filtration all contribute to a certain separation effect. Wetting the filler with a viscous liquid can further improve separation efficiency. Baffled and impact demisters at the top of evaporators and towers are also common forms of inertial separators.

[0019] The bag filter system 2 is a dry dust removal device suitable for capturing fine, dry, non-fibrous dust. The filter bags are made of textile filter cloth or non-woven felt, and utilize the filtration effect of the fiber fabric to filter the dust-laden gas. When the dust-laden gas enters the bag filter, the large particles with high specific gravity settle due to gravity and fall into the ash hopper. The gas containing finer dust is retained as it passes through the filter material, thus purifying the gas.

[0020] The opening adjustment device 3 includes a drive motor 731, a drive shaft 732 drivingly connected to the output end of the drive motor 731, and a connecting rod unit 733. The on-off valve comprises a connecting portion 723, a rotating portion 721, and a regulating valve 722. The connecting rod unit 733 comprises a drive end with a hub connected to the drive shaft 732, and a hinged end rotatably connected to the connecting portion 723. Thus, the output end of the drive motor 731 drives the drive shaft 732 to rotate, causing the drive end of the connecting rod unit 733 to rotate, thereby causing the on-off valve at the hinged end to swing, thereby adjusting the opening.

[0021] During operation, the flue gas generated by the combustion of biomass fuel in the stove enters the flue. Through the action of the flue, the soot in the flue gas is deposited in the flue, and through the action of the inertial separator 1 set in the flue, the coarser soot enters the multi-tube dust removal system, while the finer soot enters the bag dust removal system 2. The soot in the bag dust removal system 2 is then separated by the bag dust removal system 2. The finer soot is filtered by water and discharged into the atmosphere through the chimney, while the coarser soot is retained in the bag dust removal system 2. The ash conveying system of the present invention After the system is started, the fly ash in the multi-tube dust removal system enters the multi-tube dust removal ash conveying pipeline, and is blown and pulled into the ash bin under the action of the blowing device of the multi-tube dust removal ash conveying pipeline and the induced draft unit connected to the ash bin, thereby realizing the ash discharge operation; while the fly ash in the bag dust removal system 2 enters the bag dust removal ash conveying pipeline, and is blown and pulled into the ash bin under the action of the blowing device of the bag dust removal ash conveying pipeline and the induced draft unit connected to the ash bin, thereby realizing the ash discharge operation; the fly ash in the ash bin is finally transported out by a tank truck.

[0022] By setting a short-circuited bypass flue and an opening adjustment device, the direction and diversion of the flue gas in the intake flue can be flexibly adjusted, thereby solving the technical problem of increased pressure in the flue pipe system caused by the flue gas in the intake flue passing through the inertial separator 1 and then going out, making the separation and dust removal of the flue gas flexible and controllable, solving the technical problem of poor ash transportation in the flue gas treatment system pipeline, reducing the pressure difference before and after each ash delivery circuit, improving the ash transportation efficiency, and making the entire generator set operate stably and reliably. It can also effectively reduce the current of the induced draft unit at the delivery outlet, reduce the workload of the induced draft unit, inertial separator 1, etc., improve service life, and reduce the cost required for ash transportation. On the other hand, the opening adjustment device 3 can flexibly adjust the flow rate of the short-circuited bypass flue, and the opening adjustment device 3 can flexibly adjust the opening size of the exhaust flue between the inertial separator 1 and the short-circuited bypass flue, with more flexible adjustment and stronger adaptability.

[0023] The above description is merely a preferred embodiment of the present invention and does not limit the present invention in any other form. Any technician familiar with the present invention may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes for application in other fields. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the present invention without departing from the content of the technical solution of the present invention shall still fall within the scope of protection of the technical solution of the present invention.

Claims

1. An environmentally friendly flue gas treatment device for waste incineration, characterized in that: include: An inertial separator (1) for inertial separation of flue gas, and a bag dust removal system (2) for bag dust removal of flue gas, wherein the air inlet of the inertial separator (1) is connected to an air inlet flue, the air inlet of the air inlet flue is connected to the flue gas exhaust end of the boiler, the exhaust port of the inertial separator (1) is connected to an exhaust flue, and the exhaust port of the exhaust flue is connected to the bag dust removal system (2); the flue gas treatment system further comprises a short-circuit bypass flue for connecting the air inlet flue and the exhaust flue, the two ends of the short-circuit bypass flue are respectively connected to the air inlet flue and the exhaust flue, and an opening adjustment device (3) for controlling the size of its flow area is provided in the short-circuit bypass flue.

2. The environmentally friendly waste incineration flue gas treatment device according to claim 1, characterized in that: The inertial separator sets up an obstacle in the path of gas flow. When the airflow bypasses the obstacle, it suddenly turns and the particles or droplets hit the obstacle and are collected.

3. The environmentally friendly waste incineration flue gas treatment device according to claim 1, characterized in that: The bag dust removal system (2) adopts a dry dust removal device. The filter bag is made of textile filter cloth or non-textile felt. The dust-laden gas is filtered by the filtering effect of the fiber fabric. When the dust-laden gas enters the bag dust collector, the dust with large particles and high specific gravity settles down due to the action of gravity and falls into the ash hopper. When the gas containing finer dust passes through the filter material, the dust is retained, so that the gas is purified.

4. The environmentally friendly waste incineration flue gas treatment device according to claim 1, characterized in that: The opening adjustment device (3) comprises a driving motor (731), a driving shaft (732) connected to the output end of the driving motor (731) by transmission, and a connecting rod unit (733); the switch valve is provided with a connecting portion (723), a rotating portion (721), and a regulating valve (722); the connecting rod unit (733) is provided with a driving end whose hub is connected to the driving shaft (732) and a hinged end connected to the connecting portion (723) by rotation; the driving shaft (732) is driven by the output end of the driving motor (731) to rotate, so that the driving end of the connecting rod unit (733) is rotated, thereby driving the switch valve at the hinged end to swing, thereby adjusting the opening size.

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