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

Abstract

The invention relates to the technical field of waste gas treatment, in particular to a waste gas treatment device for organic fertilizer production based on efficient activated carbon treatment. Comprising a purification pipeline and a detachable activated carbon filter plate arranged in the purification pipeline, a pretreatment mechanism is fixedly arranged on the purification pipeline at the bottom of the activated carbon filter plate, an air entraining mechanism is arranged on the purification pipeline corresponding to the pretreatment mechanism, and the air entraining mechanism is located above the windward side of the activated carbon filter plate. Hot air flow on the windward side of the activated carbon filter plate is conveyed into the cold water box through the air collecting hood, so that a part of impurities on the windward side are separated into the cold water box, the adhesion of the impurities on the activated carbon filter plate can be reduced, and the hot air flow disperses the impurities in the accumulation area after being pressurized through the booster pump; and diffused impurities are sucked by means of negative pressure formed at the gas collecting hood, so that the impurities uniformly cover the windward side of the activated carbon filter plate, the local blockage phenomenon is prevented, and the self-cleaning capability of the equipment is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of waste gas treatment, in particular to a waste gas treatment device for organic fertilizer production based on high-efficiency activated carbon treatment. BACKGROUND

[0002] In the drying process of organic fertilizer, the organic fertilizer is usually introduced into a drying tank for drying operation. In order to improve the drying effect of the organic fertilizer, the drying tank is rotated (to make the organic fertilizer tumble), and hot air is introduced into the drying tank to speed up the drying process. Because the waste gas treatment pipeline connected to the drying tank has a large diameter, dust is generated during the rotation of the drying tank, and the hot air carries impurities into the waste gas treatment pipeline. The impurities are wrapped in the hot air in the horizontal direction and are affected by gravity in the vertical direction. For some heavy impurities, they will also fall in the vertical direction. Therefore, when the activated carbon plate is purifying, there are more impurities attached to the lower part of the activated carbon plate than the upper part, which causes the local blockage of the activated carbon plate. Therefore, frequent cleaning is required, which affects the purification efficiency. SUMMARY

[0003] The present application provides a waste gas treatment device for organic fertilizer production based on high-efficiency activated carbon treatment. The waste gas treatment device includes a purification pipeline and a detachable activated carbon filter plate arranged inside the purification pipeline. A pretreatment mechanism is fixedly arranged on the purification pipeline at the bottom of the activated carbon filter plate. An air guiding mechanism is arranged on the purification pipeline corresponding to the pretreatment mechanism. The air guiding mechanism is located above the windward surface of the activated carbon filter plate and communicates the windward surface with the pretreatment mechanism. An accumulation area is formed at the joint of the activated carbon filter plate below and the purification pipeline. The pretreatment mechanism communicates with the accumulation area. When the impurities in the accumulation area reach a preset treatment amount, the air guiding mechanism is responsible for transporting the hot air from the windward surface to the pretreatment mechanism. The pretreatment mechanism is used for pre-purifying the hot air and guiding the hot air to the accumulation area to drive the impurities in the accumulation area to diffuse to the windward surface. The air guiding mechanism attracts the diffused impurities to achieve uniform coverage of the impurities on the windward surface of the activated carbon filter plate.

[0004] The air guiding mechanism includes a gas collecting hood fixedly arranged above the purification pipeline and a gas guide pipe communicated with the gas collecting hood. The gas collecting hood is located on the windward surface side of the activated carbon filter plate in the horizontal direction. The gas collecting hood communicates with the inside of the purification pipeline and is used for guiding the hot air at the windward surface to the gas guide pipe.

[0005] One end of the gas guide pipe away from the gas collecting hood is communicated with the gas inlet of a booster pump. The gas outlet of the booster pump is communicated with a liquid supply pipe. The liquid supply pipe transports the hot air to the pretreatment mechanism to achieve preliminary purification of the hot air.

[0006] The pre-treatment mechanism comprises a cold water box fixedly arranged at the bottom of the purification pipeline below the activated carbon filter plate, and a water supplement box at one side of the cold water box, wherein the cold water box is pre-stored with cold water, and the liquid level of the cold water is lower than the gas outlet of the booster pump.

[0007] A gas injection channel is formed on the corresponding purification pipeline in the cold water box, which is inclined and directed to the accumulation area to impact the hot air flow on the windward surface.

[0008] A liquid return pipe and a pump body are arranged between the cold water box and the water supplement box, wherein the liquid return pipe is used for guiding the liquid in the cold water box to the water supplement box.

[0009] The pump body is communicated with a liquid inlet pipe and a liquid outlet pipe at two ends, respectively, wherein the liquid inlet pipe is communicated with the water supplement box, and the liquid outlet pipe is communicated with the cold water box.

[0010] A memory spring, a flow stopping column and a limiting plate are arranged in the cold water box, respectively, wherein the end of the memory spring and the limiting plate in the cold water box are fixed with the cold water box, the memory spring is located between the two limiting plates, the other end of the memory spring is fixed with the flow stopping column, the flow stopping column extends into the liquid outlet pipe to block the liquid outlet pipe, and the memory spring in the cold water box is in the elongated state at low temperature and in the compressed state at high temperature.

[0011] Compared with the prior art, the beneficial effects of the present application are: In the waste gas treatment device for organic fertilizer production based on high-efficiency activated carbon treatment, the hot air flow on the windward surface of the activated carbon filter plate is transported to the cold water box through the gas collecting hood, so that a part of impurities at the windward surface is separated into the cold water box, which not only reduces the adhesion of impurities on the activated carbon filter plate, but also disperses the impurities in the accumulation area after the hot air flow is pressurized by the booster pump, and then the dispersed impurities are attracted by the negative pressure formed at the gas collecting hood, so that the impurities are uniformly covered on the windward surface of the activated carbon filter plate, the local blocking phenomenon is prevented, and the self-cleaning ability of the equipment is improved. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 It is a schematic diagram of the overall structure of the present application; Figure 2 It is a schematic diagram of the internal structure of the purification pipeline of the present application; Figure 3 It is a schematic diagram of the connection structure of the gas guide box, the gas injection channel and the second activated carbon filter plate of the present application; Figure 4 It is a schematic diagram of the liquid flow in the gas injection channel and the second activated carbon filter plate of the present application; Figure 5 It is a schematic diagram of the gas flow in the purification pipeline of the present application Figure 4 It is a schematic diagram of the enlarged structure of A in the present application; Figure 6 It is a schematic diagram of the gas flow in the purification pipeline of the present application Figure 7 The figure is a schematic diagram of impurity diffusion of the application; Figure 8 The figure is a schematic diagram of the enlarged structure at B in the application. Figure 7

[0013] The meanings of various labels in the figure are as follows: 100, purification pipeline; 101, air inlet; 102, air outlet; 110, activated carbon filter plate; 111, air injection channel; 120, pretreatment mechanism; 121, cold water box; 122, water supplement box; 123, pump body; 124, liquid inlet pipe; 125, liquid return pipe; 126, liquid discharge pipe; 130, air induction mechanism; 131, air collection cover; 132, air guide pipe; 133, booster pump; 134, liquid supply pipe; 200, memory spring; 210, flow-stopping column; 211, limiting plate. DETAILED DESCRIPTION

[0014] The technical solutions in the application will be described clearly and completely below in combination with the drawings in the application. Obviously, the described embodiments are only some of the embodiments of the application, but not all the embodiments. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the application.

[0015] Since the waste gas treatment pipeline connected to the drying tank has a large diameter, and dust will be generated during the rotation of the drying tank, the hot air flow will carry the impurities into the waste gas treatment pipeline. The impurities are wrapped in the hot air flow in the transverse direction, and are affected by gravity. For some impurities with large mass, they will also drop in the longitudinal direction, so that there are more impurities attached below the activated carbon plate during purification, and relatively less impurities above the activated carbon plate, which causes local blockage of the activated carbon plate, and frequent shutdown cleaning is required, thereby affecting the purification efficiency.

[0016] Therefore, in view of the above problems, the application shows a waste gas treatment device for organic fertilizer production based on high-efficiency activated carbon treatment, which is described as follows. Figure 1 , Figure 2 ​As shown, the purification pipeline 100 is provided with a detachable activated carbon filter plate 110 inside, and the purification pipeline 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 with the drying tank, and the air outlet 102 is connected with the waste heat recovery device. The drying tank and the waste heat recovery device are both prior art, and are not shown in the figure. Then, the hot gas flow with impurities enters from the air inlet 101, and after purification by the activated carbon filter plate 110, it is discharged from the air outlet 102, so as to realize the purification of the exhaust gas.

[0017] First, the purification stage, the purification pipeline 100 at the bottom of the activated carbon filter plate 110 is fixedly provided with a pretreatment mechanism 120, and the purification pipeline 100 corresponding to the pretreatment mechanism 120 is provided with an air guiding mechanism 130. The air guiding mechanism 130 is located above the windward surface of the activated carbon filter plate 110 and communicates the windward surface with the pretreatment mechanism 120. The air guiding mechanism 130 is located below the activated carbon filter plate 110 and is attached to the purification pipeline 100 to form an accumulation area. The pretreatment mechanism 120 communicates with the accumulation area. When the impurities in the accumulation area reach the preset treatment amount, the air guiding mechanism 130 is responsible for conveying the hot gas flow on the windward surface into the pretreatment mechanism 120. The pretreatment mechanism 120 is used for pre-purification of the hot gas flow, and the hot gas is guided to the accumulation area, so as to drive the impurities in the accumulation area to diffuse to the windward surface. At the same time, the air guiding mechanism 130 attracts the diffused impurities to achieve uniform coverage of the impurities on the windward surface of the activated carbon filter plate 110. Specifically: As the impurities in the accumulation area increase, when the impurities accumulate to a certain extent (for example, when the gas on the leeward surface of the activated carbon filter plate 110 is lower than the preset threshold), the air guiding mechanism 130 is started to convey the hot gas flow on the windward surface into the pretreatment mechanism 120. Therefore, based on Figure 2 in combination with Figure 3 shown, the structure of the air guiding mechanism 130 is disclosed. The air guiding mechanism 130 includes a gas collecting cover 131 fixedly arranged above the purification pipeline 100, and a gas guiding pipe 132 communicating with the gas collecting cover 131. The gas collecting cover 131 is located on the windward side of the activated carbon filter plate 110 in the horizontal direction. The gas collecting cover 131 communicates with the inside of the purification pipeline 100 and is used to guide the hot gas flow on the windward surface into the gas guiding pipe 132. On the other hand, the gas guiding pipe 132 away from the gas collecting cover 131 is connected with the gas inlet of a booster pump 133, the gas outlet of the booster pump 133 is connected with a liquid supply pipe 134, and the liquid supply pipe 134 conveys the hot gas flow into the pretreatment mechanism 120 to achieve preliminary purification of the hot gas flow.

[0018] The specific structure of the pretreatment mechanism 120 is that the pretreatment mechanism 120 includes a cold water box 121 fixedly arranged at the bottom of the purification pipeline 100 below the activated carbon filter plate 110, and a water supplement box 122 at one side of the cold water box 121, the cold water box 121 pre-stores cold water, and the liquid level of the cold water is lower than the gas outlet of the booster pump 133 (to prevent the liquid in the cold water box 121 from flowing into the booster pump 133); in combination with Figure 4 and Figure 5 as shown, a gas injection channel 111 is arranged on the corresponding purification pipeline 100 inside the cold water box 121, the gas injection channel 111 is inclined and points to the accumulation area to impact the hot air flow on the windward surface; in this way, the cold water box 121 is in communication with the hot air flow on the windward surface, and then, when the impurities in the accumulation area are treated, the booster pump 133 in the Figure 3 is started first, the booster pump 133 sends the hot air flow on the windward surface and the impurities entrained by the hot air flow to the cold water box 121 after boosting, because the hot air flow delivered by the liquid supply pipe 134 flows through the liquid surface in the cold water box 121 (the liquid level in the cold water box 121 is lower than the liquid supply pipe 134), and then the hot air flows back to the windward surface of the activated carbon filter plate 110 from the gas injection channel 111, in this process, the impurities entrained by the hot air flow are adsorbed by the liquid in the cold water box 121, reducing the adhesion of the impurities on the activated carbon filter plate 110; At the same time, the gas collecting cover 131 sends the hot air flow from the windward surface to the cold water box 121, and also leads part of the impurities that originally pass through the activated carbon filter plate 110, reducing the coverage of the impurities on the activated carbon filter plate 110, improving the purification effect of the activated carbon filter plate 110, and reducing the cleaning frequency.

[0019] In the initial stage of the accumulation area, part of the small impurities can directly fall into the cold water box 121 through the gas injection channel 111, with the accumulation of time, the impurities attached to the bottom of the activated carbon filter plate 110 increase, and the impurities gradually accumulate below the windward surface of the activated carbon filter plate 110, affecting the purification effect.

[0020] Further, referring to the arrows in Figure 4 , the booster air flow injected from the gas injection channel 111 blows the impurities in the accumulation area to the windward surface, the arrow F2 shows the diffusion direction of the impurities in the accumulation area, in this process, the injected impurities and the impurities brought by the hot air flow form impact and collision, so that the impurities diffuse at the windward surface, improving the uniformity of the impurities covering on the activated carbon filter plate 110; secondly, the arrow F1 shows the flow direction of the hot air flow from the windward surface to the leeward surface, and the arrow F3 shows the negative pressure formed at the gas collecting cover 131, which attracts the hot air flow around the windward surface, at the same time, also attracts the impurities diffused on the windward surface to above the activated carbon filter plate 110, so that the impurities uniformly flow to the activated carbon filter plate 110.

[0021] That is, the hot air flow on the windward side of the activated carbon filter plate 110 is transported into the cold water box 121 through the gas collector 131, so that a part of the impurities on the windward side is separated into the cold water box 121, which not only reduces the adhesion of the impurities on the activated carbon filter plate 110, but also disperses the impurities in the accumulation area after the hot air flow is pressurized by the booster pump 133, and then the dispersed impurities are attracted by the negative pressure formed at the gas collector 131, so as to realize the uniform coverage of the impurities on the windward side of the activated carbon filter plate 110, prevent local blockage, and improve the self-cleaning ability of the equipment.

[0022] In addition, in the above process, the initial temperature of the liquid in the cold water box 121 is low, and the adsorption effect on organic impurities is poor. With the heat exchange between the hot air flow and the liquid, the temperature of the liquid gradually rises, and the adsorption effect on the impurities increases. The reason is that at high temperature, water molecules obtain more energy, and the movement speed increases, the collision frequency and energy of the organic fertilizer impurities increase significantly, and the dissolution process is accelerated.

[0023] It should be noted that in the initial stage, the hot air flow mainly penetrates through the activated carbon filter plate 110. When the impurities in the accumulation area gradually increase and cover the air injection channel 111, the impurities in the accumulation area will hinder the hot air flow, affecting the circulation of the hot air flow.

[0024] When the liquid in the cold water box 121 reaches the preset temperature, the saturation of the liquid in the cold water box 121 increases. In order to reduce the frequency of manual water change, please refer to Figure 6 、 Figure 7 、 Figure 8 It is shown that the liquid return pipe 125 and the pump body 123 are communicated between the cold water box 121 and the water supplement box 122. The liquid return pipe 125 is used to guide the liquid in the cold water box 121 to the water supplement box 122. The pump body 123 is communicated with the liquid inlet pipe 124 and the liquid outlet pipe 126 at two ends. The liquid inlet pipe 124 is communicated with the water supplement box 122, and the liquid outlet pipe 126 is communicated with the cold water box 121. On the other hand, the memory spring 200, the flow stopping column 210 and the limiting plate 211 are arranged in the cold water box 121. The end of the memory spring 200 in the cold water box 121 and the limiting plate 211 are fixed with 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 with the flow stopping column 210. The flow stopping column 210 extends into the liquid outlet pipe 126 to block the liquid outlet pipe 126. The memory spring 200 in the cold water box 121 is in a lengthened state at low temperature and in a compressed state at high temperature. When working, the water temperature in the cold water box 121 gradually rises. When the temperature rises to the set temperature, the memory spring 200 in the cold water box 121 changes from soft phase to hard phase, and the flow stopping column 210 is separated from the liquid outlet pipe 126. The pump body 123 transports the cold water in the water supplement box 122 to the cold water box 121. The water temperature in the cold water box 121 decreases, and the hot water in the cold water box 121 flows to the water supplement box 122 through the liquid return pipe 125. On the contrary, when the temperature of the water in the cold water box 121 is reduced, the memory spring 200 changes from hard to soft, the pump body 123 stops working, and the flow-stopping column 210 extends into the liquid discharge pipe 126. Then, if there are undissolved particles in the water supplement box 122, the undissolved particles are discharged from the bottom of the water supplement box 122 through the water discharge valve after a period of standing, and the water supplement box 122 is filled with solution again when the liquid level in the water supplement box 122 is reduced.

[0025] The basic principles, main features and advantages of the present application are shown and described above. Those skilled in the art should understand that the present application is not limited by the above examples, and the above examples and descriptions in the specification are only preferred examples of the present application and are not intended to limit the present application. Various changes and improvements can be made to the present application without departing from the spirit and scope of the present application, and these changes and improvements all fall within the scope of the claimed present application. The scope of protection of the present application 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 to spray onto 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).

2. The waste gas treatment device for organic fertilizer production based on high-efficiency activated carbon treatment according to claim 1, characterized in that: 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 from the windward side into the air guide pipe (132).

3. The waste gas treatment device for organic fertilizer production based on high-efficiency activated carbon treatment according to claim 2, characterized in that: 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.

4. The waste gas treatment device for organic fertilizer production based on high-efficiency activated carbon treatment according to claim 3, characterized in that: 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).

5. The waste gas treatment device for organic fertilizer production based on high-efficiency activated carbon treatment according to claim 1, characterized in that: 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.

6. The waste gas treatment device for organic fertilizer production based on high-efficiency activated carbon treatment according to claim 4, 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).

7. The waste gas treatment device for organic fertilizer production based on high-efficiency activated carbon treatment according to claim 6, 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).

8. The waste gas treatment device for organic fertilizer production based on high-efficiency activated carbon treatment according to claim 4, 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.

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