A purification device for ceramic pigment production exhaust gas

Abstract

The application relates to a purification device for ceramic pigment production waste gas, and belongs to the technical field of waste gas purification.The purification device for ceramic pigment production waste gas comprises a purification tower, and further comprises a spraying mechanism, a mixing mechanism, a gas injection mechanism, a fine filtering mechanism and a coarse filtering mechanism.The fine filtering mechanism is used in cooperation with the coarse filtering mechanism, and when the fine filtering mechanism rotates around the sun while rotating around itself, the filter bag is twisted and can quickly return to the initial state, the impurities attached to the outer surface of the filter bag due to the filtered waste gas are shaken off under the action of the twisting force, the cleanliness of the filter bag is ensured, the filtering efficiency and filtering quality of the waste gas are improved, and in the process, the filter screen moves up and down, the filter screen moves upward quickly, the airflow above the filter screen produces a backwash effect on the holes of the filter screen, the impurities blocked in the holes of the filter screen are removed, and thus the impurities shaken off from the outer surface of the filter bag can be discharged through the holes of the filter screen.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of waste gas purification, and particularly relates to a purification device for ceramic pigment production waste gas. BACKGROUND

[0002] The waste gas generated in the production process of ceramic pigments usually contains particulate matter, volatile organic compounds (VOCs) and heavy metal compounds, which may cause harm to the environment and human health. Therefore, waste gas purification is an important link. The main steps of ceramic pigment waste gas purification are as follows: waste gas collection: set up a gas collecting hood at the waste gas generation point (such as pigment calcination, grinding and other process links) in the ceramic pigment production workshop, and transport the waste gas to the purification equipment through the ventilation pipeline; pretreatment: use a spray tower for waste gas washing, remove particulate matter and part of the soluble pollutants by spraying water and contacting with the waste gas; catalytic purification: use a catalyst (such as a catalyst solution is transported to a reaction device by a water pump) to mix with the waste gas to accelerate the chemical reaction; deep purification: use an activated carbon adsorption device for deep adsorption of volatile organic compounds (VOCs); emission monitoring: install a waste gas monitoring device to monitor the pollutant concentration in real time.

[0003] At present, during the production of ceramic pigments, the mechanical processing links such as grinding and heat refining accelerate the evaporation of solvents due to frictional heat, and the powder spraying and drying processes cause the diffusion of particulate matter, which all lead to the generation of waste gas. In the process of waste gas purification, the dust and other particulate matter contained in the waste gas will cause the blockage of the filter bag, affecting the purification efficiency of the waste gas, and causing the waste of the treatment agent sprayed by the spraying system. In addition, although the waste gas purification device is cleaned regularly at present, the ceramic pigment production machinery will be stopped during the cleaning period of the waste gas purification device, which leads to low production efficiency and affects the benefits. Based on this, a purification device for ceramic pigment production waste gas is proposed. SUMMARY

[0004] The purpose of the present application is to provide a purification device for ceramic pigment production waste gas, which has a simple structure and a reasonable design.

[0005] The present application achieves the above-mentioned purposes through the following technical solutions:

[0006] A purification device for ceramic pigment production waste gas, comprising a purification tower, an air inlet, an exhaust pipe, a liquid inlet pipe, a communication pipe, a denitration cylinder, an adsorption box and an exhaust pipe, further comprising:

[0007] A spraying mechanism installed in the purification tower and communicating with the inside of the liquid inlet pipe;

[0008] A mixing mechanism fixedly connected in the purification tower and arranged directly below the spraying mechanism;

[0009] The gas injection mechanism is fixedly connected below the mixing mechanism in the purification tower;

[0010] The fine filtering mechanism is installed in the purification tower, and the fine filtering mechanism comprises a rotating plate, the bottom of the rotating plate is fixedly connected with a filter bag, the bottom of the filter bag is fixedly connected with a rotating disc, a fixing frame is fixedly connected to the rotating plate, the bottom of the fixing frame is fixedly connected with a connecting shaft, the bottom of the connecting shaft is rotationally connected with the top of the rotating disc, a torsion spring is fixedly connected to the outer surface of the connecting shaft, and the torsion spring is fixedly connected with the rotating disc.

[0011] The coarse filtering mechanism is installed below the fine filtering mechanism in the purification tower and is arranged above the air inlet.

[0012] As a further optimization scheme of the present application, the fine filtering mechanism further comprises a fixing ring fixedly connected to the inner wall of the purification tower, the inner surface of the fixing ring is fixedly connected with internal gear teeth, and the outer surface of the rotating disc is fixedly connected with external gear teeth.

[0013] As a further optimization scheme of the present application, the coarse filtering mechanism comprises a filter screen abutting against the inner surface of the purification tower, the top of the filter screen is fixedly connected with a threaded sleeve, a limiting column is slidably connected through the central part of the filter screen, the bottom of the rotating disc is fixedly connected with a threaded rod, and the threaded rod is connected with the threaded sleeve through threads.

[0014] As a further optimization scheme of the present application, the spraying mechanism comprises a motor installed at the top of the purification tower, the output end of the motor is fixedly connected with a rotating shaft, the outer surface of the rotating shaft is fixedly connected with a spraying frame, the outer surface of the spraying frame is sealingly rotationally connected with the inner surface of the purification tower, the liquid inlet pipe is in communication with the inside of the spraying frame, the bottom of the spraying frame is fixedly connected with a spray head, the top of the spraying frame is fixedly connected with a baffle, and the baffle abuts against the inner surface of the purification tower.

[0015] As a further optimization scheme of the present application, the rotating shaft penetrates through the rotating plate and is fixedly connected with the rotating plate, and the limiting column is fixedly connected to the bottom of the rotating shaft.

[0016] As a further optimization scheme of the present application, the mixing mechanism comprises a fixing rod fixedly connected to the inner surface of the purification tower, the bottom of the fixing rod is fixedly connected with a stirring plate arranged in a spiral form, the inner surface of a flow guide cylinder abutting against the inner surface of the purification tower is fixedly connected with fluff, the stirring plate is located in the flow guide cylinder and is in contact with the fluff, and the flow guide cylinder is fixedly connected to the outer surface of the rotating shaft.

[0017] As a further optimization scheme of the present application, the air injection mechanism comprises a guide plate fixedly connected to the inner surface of the purification tower, a fixed sleeve is fixedly connected to the top of the guide plate, the rotating shaft penetrates through the fixed sleeve and is in sealed rotary connection with the fixed sleeve, the outer surface of the fixed sleeve is fixedly communicated with the air injection pipe, and the bottom of the air injection pipe is provided with an air injection hole.

[0018] As a further optimization scheme of the present application, the air inlet is fixedly communicated with the purification tower, the waste pipe is fixedly communicated with the purification tower, and the liquid inlet end of the waste pipe is located at the top of the guide plate.

[0019] As a further optimization scheme of the present application, the other end of the communication pipe is fixedly communicated with the denitration cylinder, the adsorption box is fixedly communicated with the denitration cylinder, and the exhaust pipe is fixedly communicated with the adsorption box.

[0020] As a further optimization scheme of the present application, the liquid inlet pipe is fixedly communicated with the purification tower, one end of the communication pipe is fixedly communicated with the purification tower, and the bottom of the purification tower is fixedly communicated with the ash discharging pipe.

[0021] The present application has the following advantages:

[0022] 1. The present application uses the cooperation of the coarse filter mechanism and the fine filter mechanism, and when the fine filter mechanism rotates while revolving, the filter bag will be twisted and quickly return to the initial state, so that the impurities attached to the outer surface of the filter bag due to the filtration of waste gas are shaken off under the action of the twisting force, ensuring the cleanliness of the filter bag and improving the filtration efficiency and quality of waste gas.

[0023] 2. The present application is provided with a mixing mechanism, so that waste gas and atomized ammonia water can stay in the flow guide cylinder for a long time, facilitating the reaction of ammonia water with sulfides in waste gas, and in addition, the ammonia water will be attached to the outer surface of the fluff, so that waste gas can be fully mixed with the ammonia water adsorbed by the fluff when passing through the fluff, removing sulfides in waste gas, and in the process, the rotation of the flow guide cylinder will make the paddle rotate relative to the flow guide cylinder, so that the paddle stirs the fluff while mixing waste gas and ammonia water, causing the fluff to vibrate and shake off the droplets attached to its outer surface, so that the waste liquid can fall on the guide plate, avoiding the long-term retention of waste liquid on the fluff, which leads to the insufficient purification of ammonia water to waste gas, and thus facilitating the reabsorption of clean ammonia water by the fluff, thereby improving the purification efficiency of ammonia water to sulfides in waste gas.

[0024] 3. The present application is provided with a spraying mechanism, the rotation of the spraying mechanism ensures the uniformity of the spraying, and can intermittently seal the communication pipe, which will increase the residence time of the exhaust gas in the purification tower, increase the reaction time of the exhaust gas and ammonia water, improve the mixing efficiency of the exhaust gas and ammonia water, and can increase the internal gas pressure of the purification tower, avoid the backflow of the exhaust gas in the denitration cylinder to the purification tower, and when the communication pipe is not sealed, due to the increase of the internal gas pressure of the purification tower when the communication pipe is sealed, the exhaust gas in the purification tower can flow into the denitration cylinder quickly, ensuring the stable transmission of the gas. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 is the overall three-dimensional structure schematic diagram of the present application;

[0026] Figure 2 is the schematic diagram of the front middle part of the present application;

[0027] Figure 3 is the schematic diagram of the middle part of the present application; Figure 2 is the enlarged structure schematic diagram of A in the middle part of the present application;

[0028] Figure 4 is the enlarged structure schematic diagram of B in the middle part of the present application; Figure 2

[0029] Figure 5 is the enlarged structure schematic diagram of C in the middle part of the present application; Figure 2

[0030] Figure 6 is the schematic diagram of the top part of the present application;

[0031] Figure 7 is the schematic diagram of the top part of the present application;

[0032] Figure 8 is the schematic diagram of the middle part of the present application;

[0033] Figure 9 is the schematic diagram of the three-dimensional local part of the present application;

[0034] Figure 10 is the schematic diagram of the three-dimensional local part of the present application;

[0035] Figure 11 is the schematic diagram of the three-dimensional local part of the present application;

[0036] ​​In the figure: 1, purification tower; 2, air inlet; 3, exhaust pipe; 4, liquid inlet pipe; 5, communication pipe; 6, denitration cylinder; 7, adsorption box; 8, exhaust pipe; 9, ash removal pipe; 10, spraying mechanism; 1001, motor; 1002, rotating shaft; 1003, spraying frame; 1004, spray head; 1005, baffle; 11, mixing mechanism; 1101, fixed rod; 1102, push plate; 1103, flow guide cylinder; 1104, fluff; 12, gas injection mechanism; 1201, guide plate; 1202, fixed sleeve; 1203, gas injection pipe; 1204, gas injection hole; 13, fine filter mechanism; 1301, rotating plate; 1302, fixed frame; 1303, filter bag; 1304, rotating disc; 1305, connecting shaft; 1306, torsion spring; 1307, fixed ring; 1308, inner gear teeth; 1309, outer gear teeth; 1310, threaded rod; 14, coarse filter mechanism; 1401, filter screen; 1402, threaded sleeve; 1403, limiting column. DETAILED DESCRIPTION

[0037] The application will be further described below in conjunction with the drawings, it is necessary to point out here that the following detailed description is only used to further illustrate the application, and cannot be understood as limiting the scope of protection of the application, and those skilled in the art can make some non-essential improvements and adjustments to the application according to the above application content.

[0038] Embodiment: as shown in Figure 1 、 Figure 2 、 Figure 6 、 Figure 7 、 Figure 8 、 Figure 9 and Figure 10 A kind of purification device for ceramic pigment production waste gas, including purification tower 1, air inlet 2, exhaust pipe 3, valve is installed in exhaust pipe 3, when discharging, waste liquid generated by purifying gas can be discharged by opening valve, liquid inlet pipe 4, communication pipe 5, denitration cylinder 6, adsorption box 7 and exhaust pipe 8, air inlet 2 is fixedly communicated with purification tower 1, air inlet 2 is fixedly communicated with waste gas conveying pump (waste gas conveying pump is prior art, not shown in the figure, not detailed), exhaust pipe 3 is fixedly communicated with purification tower 1, liquid inlet pipe 4 is fixedly communicated with purification tower 1, liquid inlet pipe 4 is fixedly communicated with pump body (pump body is prior art, not shown in the figure, not detailed), ammonia water is input into purification tower 1 by pump body through liquid inlet pipe 4, one end of communication pipe 5 is fixedly communicated with purification tower 1, the other end of communication pipe 5 is fixedly communicated with denitration cylinder 6, adsorption box 7 is fixedly communicated with denitration cylinder 6 (adsorption box 7 and denitration cylinder 6 are prior art), exhaust pipe 8 is fixedly communicated with adsorption box 7, active carbon plate is installed in adsorption box 7, the bottom of purification tower 1 is fixedly communicated with ash removal pipe 9, valve is installed in ash removal pipe 9.

[0039] In use, the waste gas generated in the production of ceramic pigment enters the purification tower 1 through the air inlet 2, and is subjected to dust removal and desulfurization treatment in the purification tower 1. The treated waste gas enters the denitration cylinder 6 through the connecting pipe 5 for denitration treatment. After denitration treatment, the waste gas is adsorbed and purified by the activated carbon plate in the adsorption box 7, and is discharged through the exhaust pipe 8, thereby completing the purification of the waste gas generated in the production of ceramic pigment.

[0040] As Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 9 , Figure 10 and Figure 11As shown, the purification device further comprises a spraying mechanism 10 installed in the purification tower 1 and communicating with the inside of the liquid inlet pipe 4, the spraying mechanism 10 comprising a motor 1001 installed at the top of the purification tower 1, the output end of the motor 1001 being fixedly connected with a rotating shaft 1002, the outer surface of the rotating shaft 1002 being fixedly connected with a spraying frame 1003, the outer surface of the spraying frame 1003 being sealingly and rotatably connected with the inner surface of the purification tower 1, the liquid inlet pipe 4 communicating with the inside of the spraying frame 1003, the bottom of the spraying frame 1003 being fixedly connected with a spray head 1004, the top of the spraying frame 1003 being fixedly connected with a baffle 1005, the baffle 1005 being attached to the inner surface of the purification tower 1, the baffle 1005 being provided in a plurality of forms and being equidistantly distributed in a ring array along the top of the spraying frame 1003, further comprising a mixing mechanism 11 fixedly connected in the purification tower 1 and arranged directly below the spraying mechanism 10, the mixing mechanism 11 comprising a fixed rod 1101 fixedly connected with the inner surface of the purification tower 1, the bottom of the fixed rod 1101 being fixedly connected with a push plate 1102, the inner surface of the purification tower 1 being attached with a flow guide cylinder 1103, the inner surface of the flow guide cylinder 1103 being fixedly connected with a villus 1104, the push plate 1102 being located in the flow guide cylinder 1103, the shape of the push plate 1102 being adapted to the inner side wall of the flow guide cylinder 1103 and being obliquely arranged and in contact with the villus 1104, the flow guide cylinder 1103 being fixedly connected with the outer surface of the rotating shaft 1002, further comprising a fine filtration mechanism 13 installed in the purification tower 1 and a coarse filtration mechanism 14 located directly below the fine filtration mechanism 13 and arranged above the air inlet 2, a gas injection mechanism 12 fixedly connected in the purification tower 1 and located directly below the mixing mechanism 11, the gas injection mechanism 12 comprising a guide plate 1201 fixedly connected with the inner surface of the purification tower 1, the liquid inlet end of the exhaust pipe 3 being located at the top of the guide plate 1201, the top of the guide plate 1201 being fixedly connected with a fixed sleeve 1202, the rotating shaft 1002 penetrating through the fixed sleeve 1202 and sealingly and rotatably connected with the fixed sleeve 1202, the outer surface of the fixed sleeve 1202 being fixedly connected with a gas injection pipe 1203, the bottom of the gas injection pipe 1203 being provided with a gas injection hole 1204.

[0041] In use, before the waste gas generated in the production process of ceramic pigments enters the purification tower 1 through the gas inlet 2, the motor 1001 is started and the pump body injects ammonia water into the spray frame 1003 through the liquid inlet pipe 4, and the ammonia water is sprayed out through the spray head 1004. The operation of the motor 1001 will drive the spray frame 1003 to rotate through the shaft 1002, and then the spray head 1004 will revolve, and then the waste gas can be injected into the purification tower 1 through the gas inlet 2. The waste gas entering the purification tower 1 is first filtered by the coarse filter mechanism 14 to remove larger impurities in the waste gas, and then filtered by the fine filter mechanism 13 to remove small impurities in the waste gas. The waste gas after removing the impurities will enter the fixed sleeve 1202 under the action of the guide plate 1201, and then enter the air injection pipe 1203 through the air injection hole 1204 to spray the upper surface of the guide plate 1201. At this time, since the spray head 1004 sprays ammonia water, the ammonia water enters the flow guide cylinder 1103, and the ammonia water will adhere to the outer surface of the fluff 1104. When the filtered waste gas enters the flow guide cylinder 1103 and passes through the fluff 1104, it is fully mixed with the ammonia water adsorbed by the fluff 1104 to remove sulfides in the waste gas. The rotation of the shaft 1002 will drive the flow guide cylinder 1103 to rotate to mix the ammonia water with the waste gas, improve the mixing efficiency of the ammonia water and the waste gas, and in the process, the rotation of the flow guide cylinder 1103 will make the paddle 1102 rotate relative to the flow guide cylinder 1103, so that the paddle 1102 stirs the fluff 1104 while mixing the waste gas and the ammonia water, so that the fluff 1104 shakes and the liquid droplets adhering to the outer surface of the fluff 1104 fall off, so that the waste liquid can fall on the guide plate 1201, avoiding the waste liquid remaining on the fluff 1104 for a long time, causing the ammonia water to be unable to fully purify the waste gas, and then the fluff 1104 can reabsorb clean ammonia water, thereby improving the purification efficiency of the ammonia water on the sulfides in the waste gas.

[0042] At the same time, the rotation of the spray frame 1003 will drive the baffle 1005 to rotate, so that the baffle 1005 intermittently seals the communication pipe 5. When the communication pipe 5 is sealed, the residence time of the waste gas in the purification tower 1 will be increased, the reaction time of the waste gas and the ammonia water will be increased, the mixing efficiency of the waste gas and the ammonia water will be improved, and the internal pressure of the purification tower 1 can be increased to avoid the waste gas in the denitration cylinder 6 flowing back into the purification tower 1. When the communication pipe 5 is not sealed, due to the increase of the internal pressure of the purification tower 1 when the communication pipe 5 is sealed, the waste gas in the purification tower 1 can flow into the denitration cylinder 6 quickly, ensuring stable transmission of the gas.

[0043] As Figure 2 , Figure 4 , Figure 8 , Figure 9 , Figure 10 and Figure 11As shown, the fine filter mechanism 13 includes a rotating plate 1301, a rotating shaft 1002 passes through the rotating plate 1301 and is fixedly connected to the rotating plate 1301, a through hole is opened on the rotating plate 1301, a filter bag 1303 is fixedly connected to the bottom of the rotating plate 1301, the filter bag 1303 is located just below the through hole, a turntable 1304 is fixedly connected to the bottom of the filter bag 1303, a fixing frame 1302 is fixedly connected in the through hole of the rotating plate 1301, and a connecting rod 1304 is fixedly connected to the bottom of the fixing frame 1302. The connecting shaft 1305, the bottom of the connecting shaft 1305 is rotatably connected to the top of the turntable 1304, the outer surface of the connecting shaft 1305 is fixedly connected to the torsion spring 1306, the torsion spring 1306 is fixedly connected to the turntable 1304, the fine filtration mechanism 13 also includes a fixed ring 1307 fixedly connected to the inner wall of the purification tower 1, the inner surface of the fixed ring 1307 is fixedly connected to the inner teeth 1308, and the outer surface of the turntable 1304 is fixedly connected to the outer teeth 1309.

[0044] During use, the exhaust gas filtered by the coarse filter mechanism 14 will be filtered by the filter bag 1303, and the filtered exhaust gas will enter the top of the rotating plate 1301, and then enter the fixed sleeve 1202 under the action of the guide plate 1201. During this process, the rotation of the rotating shaft 1002 will drive the rotating plate 1301 to rotate, and then drive the filter bag 1303 to revolve through the fixing frame 1302, the connecting shaft 1305, the torsion spring 1306 and the turntable 1304. When the turntable 1304 revolves, the outer teeth 1309 fixedly connected to the outer surface of the turntable 1304 will intermittently contact with the fixed The inner teeth 1308 fixedly connected to the inner surface of the ring 1307 are engaged. When engaged, the turntable 1304 rotates under the action of the outer teeth 1309 and the inner teeth 1308, thereby twisting the torsion spring 1306 and the filter bag 1303. When disengaged, the turntable 1304 will rotate under the action of the torsion spring 1306, thereby driving the filter bag 1303 to rotate and reset, so that the impurities attached to the outer surface of the filter bag 1303 due to the filtered exhaust gas are shaken off under the action of the torsional force, thereby ensuring the cleanliness of the filter bag 1303, thereby improving the filtration efficiency and quality of the exhaust gas.

[0045] like Figure 2 、 Figure 4 、 Figure 5 、 Figure 9 、 Figure 10 and Figure 11 As shown, the coarse filtration mechanism 14 includes a filter screen 1401 attached to the inner surface of the purification tower 1, the top of the filter screen 1401 is fixedly connected with a threaded sleeve 1402, the center of the filter screen 1401 passes through a sliding connection with a limiting column 1403, the limiting column 1403 is fixedly connected to the bottom of the rotating shaft 1002, and the bottom of the turntable 1304 is fixedly connected with a threaded rod 1310, and the threaded rod 1310 is connected to the threaded sleeve 1402 by threads.

[0046] After the exhaust gas enters the purification tower 1, first, the larger impurities in the exhaust gas are filtered by the filter screen 1401, and when the inner teeth 1308 and the outer teeth 1309 are engaged, the rotation of the rotating disc 1304 will drive the threaded rod 1310 to rotate at this time, and since the filter screen 1401 is limited by the limiting column 1403, and the threaded rod 1310 is screwed with the threaded sleeve 1402, the rotation of the threaded rod 1310 will make the threaded sleeve 1402 move downward under the action of the screw, thereby pushing the filter screen 1401 to move downward, and when the outer teeth 1309 are disengaged from the engagement state of the inner teeth 1308, the threaded rod 1310 reverses the rotation, thereby making the threaded sleeve 1402 drive the filter screen 1401 to move upward, and since the rotating disc 1304 cannot be damped to a certain extent, and it occurs under the action of the torsional force generated by the torsional spring 1306, the upward movement of the filter screen 1401 is relatively fast, and since the filter screen 1401 moves up and down, and moves upward relatively fast, the airflow above the filter screen 1401 will have a backwash effect on the holes of the filter screen 1401, removing the impurities blocked in the holes of the filter screen 1401, thereby ensuring that the impurities shaken off from the outer surface of the filter bag 1303 can be discharged through the holes of the filter screen 1401.

[0047] The specific working principle of the present application is as follows:

[0048] In use, before the waste gas generated in the production process of ceramic pigments enters the purification tower 1 through the gas inlet 2, the motor 1001 is started and the pump body injects ammonia water into the spray frame 1003 through the liquid inlet pipe 4, and the ammonia water is sprayed out through the spray head 1004. The operation of the motor 1001 will drive the spray frame 1003 to rotate through the rotating shaft 1002, and then the spray head 1004 will revolve, and then the waste gas can be injected into the purification tower 1 through the gas inlet 2. After the waste gas enters the purification tower 1, the larger impurities in the waste gas are first filtered by the filter screen 1401. The filtered waste gas will enter the top of the rotating plate 1301, and then enter the fixed sleeve 1202 under the action of the guide plate 1201. In this process, the rotation of the rotating shaft 1002 will drive the rotating plate 1301 to rotate, and then drive the filter bag 1303 to revolve through the fixed frame 1302, the connecting shaft 1305, the torsional spring 1306 and the rotating disc 1304. When the rotating disc 1304 revolves, the outer teeth 1309 fixedly connected to the outer surface of the rotating disc 1304 will intermittently engage with the inner teeth 1308 fixedly connected to the inner surface of the fixed ring 1307. When the engagement occurs, the rotating disc 1304 rotates under the action of the outer teeth 1309 and the inner teeth 1308, and then the torsional spring 1306 and the filter bag 1303 are twisted. When the disengagement occurs, the rotating disc 1304 will rotate back under the action of the torsional spring 1306, and then drive the filter bag 1303 to rotate back to its original position, so that the impurities attached to the outer surface of the filter bag 1303 due to filtering the waste gas are shaken off under the action of the torsional force, ensuring the cleanliness of the filter bag 1303 and improving the filtering efficiency and quality of the waste gas;

[0049] When the inner teeth 1308 and the outer teeth 1309 engage, the rotating disc 1304 rotates and twists, which drives the threaded rod 1310 to rotate. At this time, the filter screen 1401 is limited by the limiting column 1403, and the threaded rod 1310 is screwed with the threaded sleeve 1402, so that the rotation of the threaded rod 1310 drives the threaded sleeve 1402 to move downward under the action of the screw thread, and then pushes the filter screen 1401 to move downward. When the outer teeth 1309 disengage from the inner teeth 1308, the threaded rod 1310 reversely rotates, and then drives the threaded sleeve 1402 to move upward with the filter screen 1401. Since the rotating disc 1304 cannot be damped in this process, and the movement is caused by the torsional force generated by the torsional spring 1306, the filter screen 1401 moves upward at a relatively fast speed. Since the filter screen 1401 moves up and down, and moves upward relatively fast, the airflow above the filter screen 1401 will have a backwash effect on the holes of the filter screen 1401, removing the impurities blocked in the holes of the filter screen 1401, so that the impurities shaken off from the outer surface of the filter bag 1303 can be discharged through the holes of the filter screen 1401;

[0050] The impurities removed waste gas will enter the fixed sleeve 1202 under the action of the guide plate 1201, and then enter the jet pipe 1203 through the jet hole 1204 to the upper surface of the guide plate 1201, and at this time, the ammonia water is sprayed out of the nozzle 1004, and the filtered waste gas will enter the flow guide cylinder 1103, and the ammonia water will also enter the flow guide cylinder 1103, and the ammonia water will adhere to the outer surface of the fluff 1104, so that the waste gas can be mixed with the ammonia water absorbed by the fluff 1104 when passing through the fluff 1104, and the waste gas is removed. The rotation of the rotating shaft 1002 drives the flow guide cylinder 1103 to rotate, so that the ammonia water and the waste gas are mixed, the mixing efficiency of the ammonia water and the waste gas is improved, and in this process, the rotation of the flow guide cylinder 1103 drives the paddle 1102 to rotate relative to the flow guide cylinder 1103, so that the paddle 1102 stirs the fluff 1104 while mixing the waste gas and the ammonia water, so that the fluff 1104 is shaken to shake off the liquid droplets adhered to the outer surface of the fluff 1104, so that the waste liquid can fall on the guide plate 1201, avoiding the waste liquid remaining on the fluff 1104 for a long time, causing the ammonia water to be unable to fully purify the waste gas, and then facilitating the fluff 1104 to reabsorb clean ammonia water, thereby improving the purification efficiency of the ammonia water on the sulfides in the waste gas;

[0051] At the same time, the rotation of the spray frame 1003 drives the baffle 1005 to rotate, so that the baffle 1005 intermittently seals the communication pipe 5, and when the communication pipe 5 is sealed, the residence time of the waste gas in the purification tower 1 is increased, so that the reaction time of the waste gas and the ammonia water is increased, the mixing efficiency of the waste gas and the ammonia water is improved, and the internal pressure of the purification tower 1 can be increased, avoiding the waste gas in the denitration cylinder 6 backflowing into the purification tower 1, and when the communication pipe 5 is not sealed, due to the increase of the internal pressure of the purification tower 1 when the communication pipe 5 is sealed, the waste gas in the purification tower 1 can flow into the denitration cylinder 6 quickly, ensuring stable transmission of the gas;

[0052] The treated waste gas enters the denitration cylinder 6 through the communication pipe 5 for denitration treatment, and the waste gas after denitration treatment is adsorbed and purified by the activated carbon plate in the adsorption box 7, and then discharged through the exhaust pipe 8, thereby completing the purification of the waste gas generated in the production process of ceramic pigments;

[0053] The impurities shaken off the filter screen 1401 and the filter bag 1303 will accumulate at the bottom of the purification tower 1, and when it needs to be discharged, the valve in the ash discharge pipe 9 can be opened to discharge the ash;

[0054] The waste liquid generated by the ammonia water purifying the waste gas will fall on the guide plate 1201, and when it needs to be discharged, the valve installed in the waste discharge pipe 3 can be opened to discharge the waste liquid.

[0055] The above embodiments only express several implementation manners of the present application, and the description is more specific and detailed, but it should not be understood as a limitation on the patent scope of the present application. It should be noted that for ordinary skilled persons in the art, without departing from the concept of the present application, several modifications and improvements can be made, which are within the protection scope of the present application.

Claims

1. A purification device for ceramic pigment production exhaust gas, comprising a purification tower (1), an air inlet (2), an exhaust pipe (3), a liquid inlet pipe (4), a communication pipe (5), a denitration cylinder (6), an adsorption box (7) and an exhaust pipe (8), characterized in that, Also include: The spray mechanism (10) is installed in the purification tower (1) and communicates with the inside of the liquid inlet pipe (4), the spray mechanism (10) includes a motor (1001) installed at the top of the purification tower (1), the output end of the motor (1001) is fixedly connected with a rotating shaft (1002), the outer surface of the rotating shaft (1002) is fixedly connected with a spray frame (1003), the outer surface of the spray frame (1003) is sealingly connected with the inner surface of the purification tower (1), the liquid inlet pipe (4) communicates with the inside of the spray frame (1003), the bottom of the spray frame (1003) is fixedly connected with a spray head (1004), the top of the spray frame (1003) is fixedly connected with a baffle (1005), and the baffle (1005) is attached to the inner surface of the purification tower (1); The mixing mechanism (11) is fixedly connected in the purification tower (1) and is arranged directly below the spray mechanism (10); The gas injection mechanism (12) is fixedly connected in the purification tower (1) and is located directly below the mixing mechanism (11); The fine filtering mechanism (13) is installed in the purification tower (1), the fine filtering mechanism (13) includes a rotating plate (1301), the rotating shaft (1002) penetrates through the rotating plate (1301) and is fixedly connected with the rotating plate (1301), the bottom of the rotating plate (1301) is fixedly connected with a filter bag (1303), the bottom of the filter bag (1303) is fixedly connected with a rotating disc (1304), the rotating plate (1301) is fixedly connected with a fixed frame (1302), the bottom of the fixed frame (1302) is fixedly connected with a connecting shaft (1305), the bottom of the connecting shaft (1305) is rotatably connected with the top of the rotating disc (1304), the outer surface of the connecting shaft (1305) is fixedly connected with a torsional spring (1306), the torsional spring (1306) is fixedly connected with the rotating disc (1304), the fine filtering mechanism (13) further includes a fixed ring (1307) fixedly connected to the inner wall of the purification tower (1), the inner surface of the fixed ring (1307) is fixedly connected with an inner gear (1308), and the outer surface of the rotating disc (1304) is fixedly connected with an outer gear (1309); The coarse filtering mechanism (14) is installed in the purification tower (1) and is located directly below the fine filtering mechanism (13), and the coarse filtering mechanism (14) is arranged above the air inlet (2), the coarse filtering mechanism (14) includes a filter screen (1401) attached to the inner surface of the purification tower (1), the top of the filter screen (1401) is fixedly connected with a threaded sleeve (1402), the center of the filter screen (1401) penetrates through a limiting column (1403) in sliding connection, the limiting column (1403) is fixedly connected to the bottom of the rotating shaft (1002), the bottom of the rotating disc (1304) is fixedly connected with a threaded rod (1310), and the threaded rod (1310) is connected with the threaded sleeve (1402) through threads.

2. The purification device for ceramic pigment production exhaust gas according to claim 1, characterized by: The mixing mechanism (11) comprises a fixed rod (1101) fixedly connected to the inner surface of the purification tower (1), the bottom of the fixed rod (1101) is fixedly connected with a push plate (1102), the inner surface of the purification tower (1) is attached with a flow guide cylinder (1103), the inner surface of the flow guide cylinder (1103) is fixedly connected with a villus (1104), the push plate (1102) is located in the flow guide cylinder (1103) and is in contact with the villus (1104), and the flow guide cylinder (1103) is fixedly connected to the outer surface of the rotating shaft (1002).

3. The purification device for ceramic pigment production exhaust gas according to claim 1, characterized by: The gas injection mechanism (12) comprises a guide plate (1201) fixedly connected to the inner surface of the purification tower (1), the top of the guide plate (1201) is fixedly connected with a fixed sleeve (1202), the rotating shaft (1002) penetrates through the fixed sleeve (1202) and is in sealing rotary connection with the fixed sleeve (1202), the outer surface of the fixed sleeve (1202) is fixedly connected with a gas injection pipe (1203), and the bottom of the gas injection pipe (1203) is provided with a gas injection hole (1204).

4. The purification device for ceramic pigment production exhaust gas according to claim 3, characterized by: The gas inlet (2) is fixedly connected with the purification tower (1), the waste discharge pipe (3) is fixedly connected with the purification tower (1), and the liquid inlet end of the waste discharge pipe (3) is located at the top of the guide plate (1201).

5. The purification device for ceramic pigment production exhaust gas according to claim 1, characterized by: The other end of the communication pipe (5) is fixedly connected with the denitration cylinder (6), the adsorption box (7) is fixedly connected with the denitration cylinder (6), and the exhaust pipe (8) is fixedly connected with the adsorption box (7).

6. The purification device for ceramic pigment production exhaust gas according to claim 1, characterized by: The liquid inlet pipe (4) is fixedly connected with the purification tower (1), one end of the communication pipe (5) is fixedly connected with the purification tower (1), and the bottom of the purification tower (1) is fixedly connected with a dust discharging pipe (9).

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