Waste gas treatment device for organic fertilizer production based on efficient activated carbon treatment

Abstract

The present application relates to waste gas treatment technical field, specifically, it relates to the organic fertilizer production waste gas treatment device based on high efficiency activated carbon treatment, including purification pipeline and the inside setting of purification pipeline detachable activated carbon filter plate, the bottom of the activated carbon filter plate is fixedly provided with pretreatment mechanism on the purification pipeline, the purification pipeline corresponding with the pretreatment mechanism is provided with air guide mechanism, the air guide mechanism is located above the windward surface of activated carbon filter plate. The hot air flow of windward surface of activated carbon filter plate is transported to cold water box through gas collecting hood, so that a part of impurities at windward surface is separated to cold water box, not only can reduce the adhesion of impurities on activated carbon filter plate, and, the hot air flow is pressurized after passing through booster pump, and the impurities in the accumulation area are scattered, then the diffusion impurities are attracted by the negative pressure formed at the gas collecting hood, so that the uniform coverage of impurities on the windward surface of activated carbon filter plate is realized, the local blockage phenomenon is prevented, and the equipment self-cleaning capacity is improved.

Description

Technical Field

[0001] This invention relates to the field of waste gas treatment technology, and more specifically, to a waste gas treatment device for organic fertilizer production based on high-efficiency activated carbon treatment. Background Technology

[0002] In the process of drying organic fertilizer, the organic fertilizer is usually put into the drying tank for drying. Secondly, in order to improve the drying effect of organic fertilizer, the drying tank is rotated (to turn the organic fertilizer over) and hot air is introduced into the drying tank to speed up the drying process.

[0003] Because the exhaust gas treatment pipe connected to the drying tank has a large diameter, and dust is generated during the rotation of the drying tank, the hot airflow will carry impurities into the exhaust gas treatment pipe. The impurities are carried by the hot airflow laterally and are also affected by gravity. For some large impurities, they will also descend in the vertical direction. As a result, during the purification process, there are more impurities attached to the bottom of the activated carbon plate and relatively fewer on the top, which leads to local blockage of the activated carbon plate. Frequent shutdowns for cleaning are required, which affects the purification efficiency. Summary of the Invention

[0004] This invention provides a waste gas treatment device for organic fertilizer production based on high-efficiency activated carbon treatment. The device includes a purification pipe and a detachable activated carbon filter plate inside the purification pipe. A pretreatment mechanism is fixedly installed on the purification pipe at the bottom of the activated carbon filter plate. An air-guiding mechanism is installed on the purification pipe corresponding to the pretreatment mechanism. The air-guiding mechanism is located above the windward side of the activated carbon filter plate, connecting the windward side to the pretreatment mechanism. A buildup area is formed at the junction of the activated carbon filter plate and the purification pipe below it. The pretreatment mechanism is connected to the buildup area. When the impurities in the buildup area reach a preset treatment capacity, the air-guiding mechanism transports the hot air from the windward side to the pretreatment mechanism. The pretreatment mechanism pre-purifies the hot air and guides it towards the buildup area, causing the impurities in the buildup area to diffuse towards the windward side. The air-guiding mechanism attracts the diffused impurities, achieving uniform coverage of the impurities on the windward side of the activated carbon filter plate.

[0005] The air intake mechanism includes an air collection hood fixedly installed above the purification pipe and an air guide pipe connected to the air collection hood. The air collection hood is located on the windward side of the activated carbon filter plate in the horizontal direction. The air collection hood is connected to the inside of the purification pipe and is used to guide the hot air flow from the windward side into the air guide pipe.

[0006] One end of the air guide pipe, away from the gas collection hood, is connected to the gas inlet of the booster pump, and the gas outlet of the booster pump is connected to the liquid supply pipe. The liquid supply pipe delivers hot air to the pretreatment mechanism to achieve preliminary purification of the hot air.

[0007] The pretreatment mechanism includes a cold water box fixedly installed at the bottom of the purification pipe below the activated carbon filter plate, and a water replenishment box on one side of the cold water box. The cold water box is pre-stored with cold water, and the cold water level is lower than the gas outlet of the booster pump.

[0008] An air jet channel is provided on the corresponding purification pipe inside the cold water box. The air jet channel is inclined and points towards the accumulation area to impact the hot airflow on the windward side.

[0009] A return pipe and a pump body are connected between the cold water tank and the water replenishment tank. The return pipe is used to guide the liquid in the cold water tank to the water replenishment tank.

[0010] The pump body is connected to an inlet pipe and an outlet pipe at both ends, respectively. The inlet pipe is connected to a water supply box, and the outlet pipe is connected to a cold water box.

[0011] A memory spring, a flow-stopping column, and a limiting plate are respectively installed inside the cold water box. The end of the memory spring and the limiting plate inside the cold water box are fixed to the cold water box. The memory spring is located between the two limiting plates. The other end of the memory spring is fixed to the flow-stopping column. The flow-stopping column extends into the drain pipe to block the drain pipe. The memory spring located in the cold water box is in an elongated state at low temperature and in a compressed state at high temperature.

[0012] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0013] In this waste gas treatment device for organic fertilizer production based on high-efficiency activated carbon, hot air from the windward side of the activated carbon filter plate is transported to the cold water box through a gas collection hood. This causes some impurities on the windward side to be separated into the cold water box, which not only reduces the adhesion of impurities on the activated carbon filter plate, but also, after the hot air is pressurized by a booster pump, it disperses the impurities in the accumulation area. Then, the negative pressure formed at the gas collection hood attracts the diffused impurities, thereby achieving uniform coverage of impurities on the windward side of the activated carbon filter plate, preventing local blockage and improving the self-cleaning ability of the equipment. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0015] Figure 2 This is a cross-sectional schematic diagram of the internal structure of the purification pipe of the present invention;

[0016] Figure 3 This is a schematic diagram of the connection structure of the air guide box, the jet channel, and the second activated carbon filter plate of the present invention.

[0017] Figure 4 This is a schematic diagram of the jet channel and the liquid flow inside the second activated carbon filter plate of the present invention;

[0018] Figure 5 For the present invention Figure 4 Enlarged structural diagram at point A in the diagram;

[0019] Figure 6 This is a schematic diagram of gas flow inside the purification pipeline of the present invention;

[0020] Figure 7 This is a schematic diagram of impurity diffusion according to the present invention;

[0021] Figure 8 For the present invention Figure 7 A magnified structural diagram at point B in the diagram.

[0022] The meanings of the labels in the diagram are as follows:

[0023] 100. Purification duct; 101. Air inlet; 102. Air outlet;

[0024] 110. Activated carbon filter plate; 111. Air jet channel;

[0025] 120. Pretreatment unit; 121. Cold water box; 122. Water replenishment box; 123. Pump body; 124. Inlet pipe; 125. Return pipe; 126. Drain pipe;

[0026] 130. Air intake mechanism; 131. Gas collection hood; 132. Air guide pipe; 133. Booster pump; 134. Liquid supply pipe;

[0027] 200. Memory spring; 210. Flow stop column; 211. Limiting plate. Detailed Implementation

[0028] The technical solutions of this invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this invention, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0029] Because the exhaust gas treatment pipe connected to the drying tank has a large diameter, and dust is generated during the rotation of the drying tank, the hot airflow will carry impurities into the exhaust gas treatment pipe. The impurities are carried by the hot airflow laterally and are also affected by gravity. For some large impurities, they will also descend in the vertical direction. As a result, during the purification process, there are more impurities attached to the bottom of the activated carbon plate and relatively fewer on the top, which leads to local blockage of the activated carbon plate. Frequent shutdowns for cleaning are required, which affects the purification efficiency.

[0030] Therefore, in view of the above-mentioned problems, the present invention provides a waste gas treatment device for organic fertilizer production based on high-efficiency activated carbon treatment, referencing... Figure 1 , Figure 2As shown, the system includes a purification pipe 100 and a removable activated carbon filter plate 110 installed inside the purification pipe 100. The purification pipe 100 has an air inlet 101 and an air outlet 102 at both ends. When purifying the exhaust gas, the air inlet 101 is connected to a drying tank, and the air outlet 102 is connected to a waste heat recovery device. The drying tank and the waste heat recovery device are both existing technologies and are not shown in the figure. Then, the hot airflow carrying impurities enters from the air inlet 101, is purified by the activated carbon filter plate 110, and is discharged from the air outlet 102, thereby achieving the purification of the exhaust gas.

[0031] First, in the purification stage, a pretreatment mechanism 120 is fixedly installed on the purification pipe 100 at the bottom of the activated carbon filter plate 110. A gas-drawing mechanism 130 is installed on the purification pipe 100 corresponding to the pretreatment mechanism 120. The gas-drawing mechanism 130 is located above the windward side of the activated carbon filter plate 110, connecting the windward side to the pretreatment mechanism 120. An accumulation zone is formed at the point where the activated carbon filter plate 110 meets the purification pipe 100. The pretreatment mechanism 120 is connected to the accumulation zone. When the impurities in the accumulation zone reach a preset treatment capacity, the gas-drawing mechanism 130 is responsible for conveying the hot airflow from the windward side into the pretreatment mechanism 120. The pretreatment mechanism 120 is used to pre-purify the hot airflow and guide it towards the accumulation zone, causing the impurities in the accumulation zone to diffuse towards the windward side. Simultaneously, the gas-drawing mechanism 130 attracts the diffused impurities, achieving uniform coverage of the impurities on the windward side of the activated carbon filter plate 110. Specifically:

[0032] As impurities accumulate in the accumulation zone, when the impurities reach a certain level (for example, when the gas on the leeward side of the activated carbon filter plate 110 is below a preset threshold), the air intake mechanism 130 is activated to deliver hot air from the windward side into the pretreatment mechanism 120. Therefore, based on Figure 2 Based on and combined Figure 3 As shown, the structure of the air intake mechanism 130 is disclosed. The air intake mechanism 130 includes an air collection hood 131 fixedly installed above the purification pipe 100, and an air guide pipe 132 connected to the air collection hood 131. The air collection hood 131 is located on the windward side of the activated carbon filter plate 110 in the horizontal direction. The air collection hood 131 is connected to the interior of the purification pipe 100 and is used to guide the hot air flow on the windward side into the air guide pipe 132. On the other hand, one end of the air guide pipe 132 away from the air collection hood 131 is connected to the gas inlet of the booster pump 133. The gas outlet of the booster pump 133 is connected to the liquid supply pipe 134. The liquid supply pipe 134 delivers hot air flow into the pretreatment mechanism 120 to achieve preliminary purification of the hot air flow.

[0033] The pretreatment mechanism 120 has the following specific structure: it includes a cold water box 121 fixedly installed at the bottom of the purification pipe 100 below the activated carbon filter plate 110, and a water replenishment box 122 on one side of the cold water box 121. The cold water box 121 contains pre-stored cold water, with the cold water level lower than the gas outlet of the booster pump 133 (to prevent liquid from flowing into the booster pump 133). Combined with... Figure 4 and Figure 5 As shown, a jet channel 111 is provided on the corresponding purification pipe 100 inside the cold water box 121. The jet channel 111 is inclined and points towards the accumulation area to impact the hot airflow on the windward side. In this way, the cold water box 121 is connected to the hot airflow on the windward side. Therefore, when treating impurities in the accumulation area, the process is first started. Figure 3 The booster pump 133 pressurizes the hot airflow and impurities carried by it and delivers it into the cold water box 121. Since the hot airflow delivered by the liquid supply pipe 134 flows over the liquid surface in the cold water box 121 (the liquid level in the cold water box 121 is lower than that in the liquid supply pipe 134), the hot air then flows back to the windward side of the activated carbon filter plate 110 through the jet channel 111. During this process, the impurities carried by the hot airflow are adsorbed by the liquid in the cold water box 121, reducing the adhesion of impurities on the activated carbon filter plate 110.

[0034] At the same time, the air collection hood 131 delivers hot airflow from the windward direction into the cold water box 121, and also draws out some of the impurities that would normally pass through the activated carbon filter plate 110, reducing the coverage of impurities on the activated carbon filter plate 110, improving the purification effect of the activated carbon filter plate 110, and reducing the cleaning frequency.

[0035] In the initial stage of the accumulation zone, some small particles of impurities can fall directly into the cold water box 121 through the jet channel 111. As time accumulates, the amount of impurities attached to the bottom of the activated carbon filter plate 110 increases, and the impurities gradually accumulate below the windward side of the activated carbon filter plate 110, affecting the purification effect.

[0036] Further reference Figure 4 As shown by the middle arrow, the pressurized airflow ejected from the jet channel 111 blows the impurities in the accumulation area toward the windward side. Arrow F2 indicates the direction of impurity diffusion in the accumulation area. During this process, the ejected impurities collide with the impurities brought by the hot airflow, causing the impurities to diffuse on the windward side and improving the uniformity of impurity coverage on the activated carbon filter plate 110. Secondly, arrow F1 indicates the direction of hot airflow from the windward side to the leeward side, while arrow F3 indicates the negative pressure formed at the gas collection hood 131, which attracts the hot airflow around the windward side. At the same time, it also attracts the impurities diffused on the windward side toward the activated carbon filter plate 110, so that the impurities flow evenly toward the activated carbon filter plate 110.

[0037] In other words, the hot airflow from the windward side of the activated carbon filter plate 110 is transported to the cold water box 121 through the gas collection hood 131, causing some of the impurities on the windward side to be separated into the cold water box 121. This not only reduces the adhesion of impurities on the activated carbon filter plate 110, but also, after the hot airflow is pressurized by the booster pump 133, it disperses the impurities in the accumulation area. Then, the negative pressure formed at the gas collection hood 131 attracts the diffused impurities, thereby achieving uniform coverage of impurities on the windward side of the activated carbon filter plate 110, preventing local blockage and improving the self-cleaning ability of the equipment.

[0038] Furthermore, during the above process, the initial temperature of the liquid in the cold water box 121 is low, resulting in poor adsorption of organic impurities. As the hot airflow exchanges heat with the liquid, the liquid temperature gradually increases, and the adsorption effect on impurities increases. This is because at high temperatures, water molecules gain more energy, their movement speed increases, and the collision frequency and energy with organic fertilizer impurities significantly increase, thus accelerating the dissolution process.

[0039] It should be noted that in the initial stage, the hot airflow mainly passes through the activated carbon filter plate 110. When the impurities in the accumulation area gradually increase and cover the jet channel 111, the impurities in the accumulation area will obstruct the hot airflow and affect the flow of hot air.

[0040] The following diagram shows that when the liquid in the cold water tank 121 reaches the preset temperature, the liquid saturation in the cold water tank 121 increases. To reduce the frequency of manual water changes, please refer to... Figure 6 , Figure 7 , Figure 8 As shown, a return pipe 125 and a pump body 123 connect the cold water tank 121 and the water replenishment tank 122. The return pipe 125 is used to guide the liquid in the cold water tank 121 to the water replenishment tank 122. The pump body 123 is connected to an inlet pipe 124 and a drain pipe 126 at both ends, respectively. The inlet pipe 124 is connected to the water replenishment tank 122, and the drain pipe 126 is connected to the cold water tank 121. On the other hand, a memory spring 200, a flow stop column 210, and a limiting plate 211 are respectively provided in the cold water tank 121. The end of the memory spring 200 and the limiting plate 211 in the cold water tank 121 are fixed to the cold water tank 121. The memory spring 200 is located between the limiting plates 211 on both sides. The other end of the memory spring 200 is fixed to the stop column 210, which extends into the drain pipe 126 to block the drain pipe 126. The memory spring 200 located in the cold water box 121 is in an elongated state at low temperature and in a compressed state at high temperature. During operation, the water temperature in the cold water box 121 gradually rises. When it reaches the set temperature, the memory spring 200 in the cold water box 121 changes from a soft phase to a hard phase, and the stop column 210 is removed from the drain pipe 126. The pump body 123 delivers cold water from the water supply box 122 to the cold water box 121, and the water temperature in the cold water box 121 decreases. Meanwhile, the hot water in the cold water box 121 flows back to the water supply box 122 through the return pipe 125.

[0041] Conversely, when the water temperature in the cold water box 121 decreases, the memory spring 200 changes from a hard phase to a soft phase, the pump body 123 stops working, and the stop column 210 extends into the drain pipe 126. Then, if there are undissolved particles in the water replenishment box 122, by letting it stand for a period of time, the undissolved particles are discharged through the drain valve at the bottom of the water replenishment box 122 to remove the sediment layer. When the liquid level in the water replenishment box 122 decreases, the solution can be replenished into the water replenishment box 122.

[0042] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. An organic fertilizer production waste gas treatment device based on high-efficiency activated carbon treatment, comprising a purification pipe (100) and a removable activated carbon filter plate (110) installed inside the purification pipe (100), characterized in that: A pretreatment mechanism (120) is fixedly installed on the purification pipe (100) at the bottom of the activated carbon filter plate (110). An air intake mechanism (130) is installed on the purification pipe (100) corresponding to the pretreatment mechanism (120). The air intake mechanism (130) is located above the windward side of the activated carbon filter plate (110) and connects the windward side with the pretreatment mechanism (120). An accumulation area is formed at the junction of the activated carbon filter plate (110) and the purification pipe (100) below the activated carbon filter plate (110). The pretreatment mechanism (120) is connected to the accumulation area. When the impurities in the accumulation area reach the preset treatment amount, the air intake mechanism (130) is responsible for conveying the hot air flow from the windward side to the pretreatment mechanism (120). The pretreatment mechanism (120) is used to pre-purify the hot air flow and guide the hot air flow to the accumulation area, driving the impurities in the accumulation area to diffuse towards the windward side. The air intake mechanism (130) attracts the diffused impurities so as to achieve uniform coverage of impurities on the windward side of the activated carbon filter plate (110). The air intake mechanism (130) includes an air collection hood (131) fixedly installed above the purification pipe (100) and an air guide pipe (132) connected to the air collection hood (131). The air collection hood (131) is located on the windward side of the activated carbon filter plate (110) in the horizontal direction. The air collection hood (131) is connected to the interior of the purification pipe (100) and is used to guide the hot air flow on the windward side into the air guide pipe (132). One end of the air guide pipe (132) away from the gas collection hood (131) is connected to the gas inlet of the booster pump (133), and the gas outlet of the booster pump (133) is connected to the liquid supply pipe (134). The liquid supply pipe (134) delivers hot air to the pretreatment mechanism (120) to achieve preliminary purification of the hot air. The pretreatment mechanism (120) includes a cold water box (121) fixedly installed at the bottom of the purification pipe (100) below the activated carbon filter plate (110), and a water replenishment box (122) on one side of the cold water box (121). The cold water box (121) is pre-stored with cold water, and the cold water level is lower than the gas outlet of the booster pump (133). An air jet channel (111) is provided on the corresponding purification pipe (100) inside the cold water box (121). The air jet channel (111) is inclined and points towards the accumulation area to impact the hot airflow on the windward side.

2. The waste gas treatment device for organic fertilizer production based on high-efficiency activated carbon treatment according to claim 1, characterized in that: A return pipe (125) and a pump body (123) are connected between the cold water box (121) and the water replenishment box (122). The return pipe (125) is used to guide the liquid in the cold water box (121) to the water replenishment box (122).

3. The waste gas treatment device for organic fertilizer production based on high-efficiency activated carbon treatment according to claim 2, characterized in that: The pump body (123) is connected to an inlet pipe (124) and a drain pipe (126) at both ends. The inlet pipe (124) is connected to a water supply box (122), and the drain pipe (126) is connected to a cold water box (121).

4. The waste gas treatment device for organic fertilizer production based on high-efficiency activated carbon treatment according to claim 3, characterized in that: A memory spring (200), a flow stop column (210), and a limiting plate (211) are respectively provided in the cold water box (121). The end of the memory spring (200) and the limiting plate (211) in the cold water box (121) are fixed to the cold water box (121). The memory spring (200) is located between the limiting plates (211) on both sides. The other end of the memory spring (200) is fixed to the flow stop column (210). The flow stop column (210) extends into the drain pipe (126) to block the drain pipe (126). The memory spring (200) in the cold water box (121) is in an elongated state at low temperature and in a compressed state at high temperature.

Images