A desulfurization device and method for flue gas from a prebaked anode baking kiln

Abstract

This invention relates to the field of desulfurization equipment, and more particularly to a desulfurization device and method for flue gas from a prebaked anode calcining kiln. The device includes a spray chamber, a demister chamber installed at the top of the spray chamber, an exhaust stack installed at the top of the demister chamber, a liquid storage chamber installed at the bottom of the spray chamber, and a pump chamber installed on one side of the outer circumference of the liquid storage chamber. The output end of the pump chamber is connected to an inlet pipe, a first water outlet pipe, and a second water outlet pipe. The input end of the pump chamber is connected to an external water replenishment device. A ring frame is fixedly connected to the top of the first water outlet pipe, which is installed at the bottom of the demister chamber. Evenly distributed nozzles are installed on both the upper and lower parts of the ring frame. A conduit is fixedly connected to one side of the middle of the first water outlet pipe. This invention allows for flexible control of the fineness of the intercepting water curtain by adjusting the correspondence between the spray nozzles and the reserved openings through a rotatable inner pipe, significantly improving the interception efficiency of particulate impurities under different operating conditions and ensuring stable initial desulfurization and dust removal effects.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of desulfurization equipment, and particularly relates to a prebaked anode roasting kiln flue gas desulfurization device and method. BACKGROUND

[0002] At present, the prebaked anode roasting kiln flue gas desulfurization mostly adopts a wet process, but the prior art has many limitations: the spraying system is mostly in a fixed mode, and it is difficult to adapt to the flue gas with fluctuating dust content, and the initial purification is not thorough when facing high-dust flue gas, and the low-dust flue gas also causes resource waste due to fixed parameters; the slurry after spraying is easy to remain on the inner wall of the equipment, and the mist eliminator is easy to be blocked by dirt, and frequent shutdown for cleaning is required, which not only affects the continuous operation of the system, but also increases the operation and maintenance cost; the water mist in the desulfurization process is mostly sprayed in a fixed direction, and the contact area with the flue gas is limited, which leads to insufficient reaction of sulfur dioxide and poor deep desulfurization effect; the calcium sulfite generated in the reaction is easy to accumulate, causing the slurry concentration in the liquid storage bin to be unbalanced, and the desulfurizing agent needs to be frequently replaced, which not only wastes raw materials but also increases the pressure of solid waste treatment; the exhaust cylinder condensation dehydration mostly relies on external power supply, and the energy consumption is high, and the condensation effect is obviously attenuated in a high-temperature environment, and it is difficult to balance energy saving and purification effect, and these problems all restrict the comprehensive performance and actual application value of the desulfurization system, therefore, the present application provides a prebaked anode roasting kiln flue gas desulfurization device and method to solve the above-mentioned problems. SUMMARY

[0003] The present application aims at solving the problems in the background art, and provides a prebaked anode roasting kiln flue gas desulfurization device and method.

[0004] In order to achieve the above object, the technical scheme adopted by the present application is: a prebaked anode baking kiln flue gas desulfurization device, comprising a spraying bin, a demisting bin is installed on the top of the spraying bin, an exhaust cylinder is installed on the top of the demisting bin, a liquid storage bin is installed at the bottom of the spraying bin, a pump bin is installed on one side of the outer periphery of the liquid storage bin, an inlet pipe, a water outlet pipe one and a water outlet pipe two are respectively connected to the output end of the pump bin, an external water supplement device is connected to the input end of the pump bin, a ring frame is fixedly connected to the top of the water outlet pipe one, the ring frame is installed on the inner bottom of the demisting bin, evenly distributed spray heads one are installed on the upper and lower parts of the ring frame, a guide pipe is fixedly connected to one side of the middle part of the water outlet pipe one, a rotary joint is fixedly connected to the end of the guide pipe away from the water outlet pipe one, a hollow pipe is rotatably connected to the bottom of the rotary joint, fixed rings are fixedly connected to the inner upper and lower parts of the spraying bin, evenly distributed fixed plates are fixedly connected to the inner side of the fixed rings, the ends of the fixed plates away from the fixed rings are fixedly connected to the outer periphery of the rotary joint, evenly distributed spray pipes are fixedly connected to the outer middle part of the hollow pipe, spray heads two are installed on the outer middle part of the spray heads, and the spray pipes and the spray heads are in communication with the inside of the hollow pipe.

[0005] Preferably, an air inlet is installed on one side of the spraying bin, the air inlet is connected to an air inlet pipe, and the air inlet pipe is connected to a baking kiln flue gas channel.

[0006] Preferably, the bottom of the hollow pipe penetrates through a lower rotary joint, and a speed reducer is connected to the bottom of the hollow pipe.

[0007] Preferably, a top bin is installed on the top of the air inlet, the water outlet pipe two is installed on the top of the top bin, evenly distributed communication plates are fixedly connected to the bottom of the top bin, and spraying pipes are fixedly connected to the bottom of the communication plates.

[0008] Preferably, the bottom of the spraying pipe is provided with a reserved port, an inner pipe is rotatably connected to the inside of the spraying pipe, a plurality of spraying ports are formed in the outer middle part of the inner pipe, and each spraying port is provided in different shapes.

[0009] Preferably, a stepping motor is installed on each of the two end parts of the inner pipe, the driving end of the stepping motor is fixedly connected to the end part of the inner pipe, evenly distributed air holes are formed in the bottom of the top bin, and the air holes penetrate through the top of the air inlet.

[0010] Preferably, a vertical cylinder is fixedly connected to the middle part of the liquid storage bin, guide plates are fixedly connected to the outer middle part and upper part of the vertical cylinder, and filter holes are formed in the guide plates.

[0011] Preferably, the upper part of the outer periphery of the vertical cylinder is provided with uniformly distributed openings, the top of the openings is fixedly connected with a speed reducer, the inside of the vertical cylinder is provided with an auger, the top of the auger is fixedly connected with the bottom output end of the speed reducer, the upper part of one side of the vertical cylinder is fixedly connected with a discharge pipe, and the discharge pipe is arranged at the lower part of one side of the spraying bin.

[0012] Preferably, a plurality of demisters are mounted in the inside of the demisting bin, a condensing cone is mounted at the inside top of the exhaust cylinder, a photovoltaic panel is mounted at the top of the condensing cone, and uniformly distributed exhaust holes are formed at the top outside of the exhaust cylinder.

[0013] Preferably, a pre-baked anode roasting kiln flue gas desulfurization method comprises the following operation steps:

[0014] S1, desulfurizer preparation and introduction:

[0015] Start the pump bin, draw the limestone water through the external water supplement device connected with the input end of the pump bin, and then transport the limestone water to the liquid storage bin through the feeding pipe at the output end of the pump bin, until the slurry concentration in the liquid storage bin reaches the working standard of 20%-30%;

[0016] S2, flue gas introduction and initial purification:

[0017] S2.1, open the roasting kiln flue gas channel, so that the flue gas enters the gas inlet through the gas inlet pipe;

[0018] S2.2, simultaneously start the pump bin, and transport part of the limestone water in the liquid storage bin to the top bin through the water outlet pipe two, and part of the water directly sprays into the gas inlet through the air holes at the bottom of the top bin to intercept the initial high-concentration particulate impurities in the flue gas;

[0019] S2.3, another part of the water enters the spraying pipe through the communication plate at the bottom of the top bin, and then flows into the inner pipe in the spraying pipe, the step motor at the end of the spraying pipe is started to drive the inner pipe to rotate, the spraying openings of different shapes at the outer periphery of the inner pipe are corresponded to the reserved openings at the bottom of the spraying pipe, so that the water forms an interception water curtain adapted to the dust content of the flue gas, and the initial desulfurization and dust removal of the flue gas are completed;

[0020] S3, deep desulfurization treatment:

[0021] S3.1, the flue gas after initial purification enters the spraying bin, and the pump bin is started to split the limestone water in the liquid storage bin through the water outlet pipe one:

[0022] ① part of the water directly enters the ring frame, and is sprayed through the upper and lower nozzles of the ring frame, the upper nozzle washes the demisters in the demisting bin and forms a water film, and the lower nozzle washes the equipment at the lower part of the spraying bin;

[0023] ②Another part of the water liquid enters the hollow pipe through the guide pipe in the middle of the water outlet pipe and the rotating joint, and a part of the water liquid flows into the spray head in the outer periphery of the hollow pipe, forms 360-degree water mist through the through holes in the outer periphery of the spray head, and sprays water through the second nozzle in the middle of the spray head to drive the spray head to rotate;

[0024] ③Another part of the water liquid flows into the spray pipe in the outer periphery of the hollow pipe, is sprayed obliquely through the spray pipe to generate a reverse thrust, drives the hollow pipe to rotate as a whole around the rotating joint, forms a dynamic surrounding water mist, fully contacts with the floating flue gas in the spray chamber, and completes the deep reaction of sulfur dioxide;

[0025] S4, calcium sulfite separation and recovery:

[0026] S4.1, the calcium sulfite generated in the reaction falls to the guide plate in the upper part of the storage tank with the slurry, is filtered through the filter holes on the guide plate, the water liquid returns to the storage tank for recycling, the calcium sulfite and impurities are guided through the guide plate and enter the vertical cylinder through the openings in the outer periphery of the vertical cylinder;

[0027] S4.2, when the hollow pipe rotates, the speed reducer connected to the bottom of the hollow pipe is started synchronously, drives the auger in the vertical cylinder to rotate, and the calcium sulfite precipitate in the vertical cylinder is upwardly conveyed and discharged through the discharge pipe in the upper part of the vertical cylinder, and the calcium sulfite recovery is completed;

[0028] S5, mist removal and exhaust treatment:

[0029] S5.1, the flue gas after deep desulfurization continues to float, passes through the mist remover in the mist removal chamber, and removes the water mist in the flue gas;

[0030] S5.2, then the flue gas enters the exhaust cylinder, the condensing cone in the top of the exhaust cylinder is started to condense and dehydrate the flue gas; if the external illumination is strong and the temperature is high, the photovoltaic panel on the top of the condensing cone absorbs light energy, the semiconductor refrigerator in the condensing cone is started through the inverter, and the condensing effect is strengthened, and finally the purified flue gas is discharged through the exhaust hole outside the top of the exhaust cylinder;

[0031] S6, system circulation and maintenance:

[0032] The concentration of the slurry in the storage tank is continuously monitored, and the limestone water liquid is supplemented in time through the pump chamber; the inner wall of the spray chamber is washed through the first nozzle at the lower part of the ring frame regularly, so that the slurry residue is prevented from scaling, and the system is ensured to continuously and stably operate.

[0033] Compared with the prior art, the present application has the following beneficial effects:

[0034] 1. In view of the pain point that the fixed spraying mode in the prior art is difficult to cope with flue gas with fluctuating dust content, the present application uses a hierarchical adjustable water curtain interception assembly, which draws limestone water into a liquid storage bin through a pump bin, and at the same time guides the flue gas of the roasting furnace into the air inlet. A preliminary interception water curtain is formed by spraying through the top bin holes to capture impurities in the initial stage of flue gas (with the highest concentration and the most dense particles), solving the problem of incomplete purification in the initial stage of traditional desulfurization. The corresponding relationship between the spraying port and the reserved port is adjusted by the rotatable inner tube, and the fineness of the interception water curtain is flexibly controlled. For high-dust flue gas, the water curtain is densified, and for low-dust flue gas, the water curtain spacing is optimized. This breaks the limitation of the poor adaptability of single spraying parameters in the prior art, greatly improves the interception efficiency of particulate impurities under different working conditions, and ensures stable initial desulfurization and dust removal effect.

[0035] 2. In view of the problem that slurry residues remain on the inner wall of the equipment after spraying, and the demister is prone to fouling and blockage, resulting in frequent system shutdown for cleaning, the present application constructs a dual-function system of "equipment self-cleaning + demister cooperation", and the water is introduced into the ring frame and hollow pipe through the water outlet pipe and guide pipe. The upper nozzle of the ring frame is used to wash the demister, which not only avoids fouling of the demister and reduces efficiency, but also strengthens the secondary demisting of the floating gas by means of the water film left after washing, so that the purity of the final exhaust gas is effectively improved compared with the prior art. At the same time, the lower nozzle is used to wash the lower equipment of the spraying bin, and the slurry mixture after reaction is returned to the guide plate, avoiding the adhesion and fouling of the slurry, reducing the frequency of equipment shutdown for cleaning, prolonging the continuous operation time of the system, and reducing the operation and maintenance cost.

[0036] 3. In view of the defects that fixed direction spraying in wet desulfurization results in limited contact area between flue gas and water mist, and sulfur dioxide reaction is not sufficient, the present application innovatively uses a deep desulfurization structure. After the water enters the hollow pipe through the rotary joint, part of it forms a 360° water mist with no dead angle through the peripheral through hole of the spray head, and the spray head is driven to rotate by the pressurized nozzle, so that the coverage of the water mist is more than 3 times larger than that of fixed spraying. Another part is sprayed through the nozzle to generate a reverse thrust, driving the hollow pipe to rotate as a whole, forming a dynamic rotating interception net for the water mist, and forming a cross-flow contact with the continuously floating flue gas. This greatly increases the gas-liquid contact volume and reaction time, and the sulfur dioxide removal rate is greatly improved compared with the prior art, completely solving the technical problem of insufficient deep desulfurization.

[0037] 4、In view of the problem that the existing technology causes the slurry concentration in the storage tank to be unbalanced due to the accumulation of calcium sulfite and the desulfurizing agent needs to be frequently replaced, the application is designed by automatic precipitation collection and slurry recycling, so that the calcium sulfite generated in the reaction falls back to the guide plate with the slurry, the guide plate is connected after filtration to make the water flow back to the storage tank for recycling, the calcium sulfite and impurities are concentrated in the vertical cylinder, the concentration of the desulfurizing agent in the storage tank is avoided to be diluted, at the same time, the hollow tube is connected to the speed reducer when rotating to automatically transport the calcium sulfite precipitate in the vertical cylinder upward to the discharge pipe for discharge, without manual cleaning, which not only ensures the stability of the concentration of the desulfurizing agent in the storage tank to ensure the subsequent spraying effect, but also realizes the convenient recovery of calcium sulfite, and the consumption of desulfurizing agent is greatly reduced compared with the existing technology, and the pressure of solid waste treatment is reduced.

[0038] 5、In view of the problem that the existing technology causes the slurry concentration in the storage tank to be unbalanced due to the accumulation of calcium sulfite and the desulfurizing agent needs to be frequently replaced, the application is designed by automatic precipitation collection and slurry recycling, so that the calcium sulfite generated in the reaction falls back to the guide plate with the slurry, the guide plate is connected after filtration to make the water flow back to the storage tank for recycling, the calcium sulfite and impurities are concentrated in the vertical cylinder, the concentration of the desulfurizing agent in the storage tank is avoided to be diluted, at the same time, the hollow tube is connected to the speed reducer when rotating to automatically transport the calcium sulfite precipitate in the vertical cylinder upward to the discharge pipe for discharge, without manual cleaning, which not only ensures the stability of the concentration of the desulfurizing agent in the storage tank to ensure the subsequent spraying effect, but also realizes the convenient recovery of calcium sulfite, and the consumption of desulfurizing agent is greatly reduced compared with the existing technology, and the pressure of solid waste treatment is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0039] Figure 1 It is a structure front view of the present application, a prebaked anode baking kiln flue gas desulfurization device and method;

[0040] Figure 2 It is an internal structure diagram of the present application, a prebaked anode baking kiln flue gas desulfurization device and method;

[0041] Figure 3 It is a local structure diagram of the guide plate of the present application, a prebaked anode baking kiln flue gas desulfurization device and method;

[0042] Figure 4 It is a local structure diagram of the hollow tube and the spray head of the present application, a prebaked anode baking kiln flue gas desulfurization device and method;

[0043] Figure 5 It is a local structure diagram of the spray head and the spray head of the present application, a prebaked anode baking kiln flue gas desulfurization device and method;

[0044] Figure 6 It is a local structure diagram in the gas inlet of the present application, a prebaked anode baking kiln flue gas desulfurization device and method;

[0045] Figure 7 It is a local structure diagram in the top tank of the present application, a prebaked anode baking kiln flue gas desulfurization device and method;

[0046] Figure 8 Figure 1 is a schematic diagram of a partial structure of an inner tube of a prebaked anode baking furnace flue gas desulfurization device and method of the present application.

[0047] 101, spray bin; 102, demisting bin; 103, exhaust cylinder; 104, exhaust hole; 105, water outlet pipe one; 106, discharge pipe; 107, feeding pipe; 108, pump bin; 109, air inlet pipe; 110, top bin; 111, water outlet pipe two; 112, guide plate; 113, liquid storage bin; 114, vertical cylinder; 115, opening; 116, air inlet; 117, through hole; 118, spray head one; 119, ring frame; 120, demister; 121, condensing cone; 122, auger; 123, spray pipe; 124, hollow pipe; 125, spray head; 126, fixed plate; 127, fixed ring; 128, spray pipe; 129, spray opening; 130, speed reducer; 131, spray head two; 132, reserved port; 133, rotary joint; 134, conduit; 135, inner tube; 136, communication plate; 137, air hole. DETAILED DESCRIPTION

[0048] The following description is presented to enable any person skilled in the art to practice the application as claimed. The preferred embodiments disclosed herein are only examples of the application and alternative variations thereof are contemplated as falling within the spirit and scope of the application.

[0049] As Figures 1-8The device for flue gas desulfurization of a prebaked anode baking kiln comprises a spraying bin 101, a demisting bin 102 installed on the top of the spraying bin 101, an exhaust cylinder 103 installed on the top of the demisting bin 102, a liquid storage bin 113 installed on the bottom of the spraying bin 101, a pump bin 108 installed on one side of the outer periphery of the liquid storage bin 113, an inlet pipe 107, a water outlet pipe one 105 and a water outlet pipe two 111 connected to the output end of the pump bin 108 respectively, a ring frame 119 fixedly connected to the top of the water outlet pipe one 105 and installed on the inner bottom of the demisting bin 102, a plurality of evenly distributed spray heads one 118 installed on the upper and lower parts of the ring frame 119, a guide pipe 134 fixedly connected to one side of the middle part of the water outlet pipe one 105, a rotary joint 133 fixedly connected to the end of the guide pipe 134 away from the water outlet pipe one 105, a hollow pipe 124 rotatably connected to the bottom of the rotary joint 133, a plurality of fixed rings 127 fixedly connected to the inner bottom of the spraying bin 101, a plurality of fixed plates 126 fixedly connected to the inner side of the fixed rings 127, the ends of the fixed plates 126 away from the fixed rings 127 are fixedly connected to the outer periphery of the rotary joint 133, a plurality of evenly distributed spray pipes 123 fixedly connected to the outer periphery of the middle part of the hollow pipe 124, a plurality of spraying heads 125 arranged between the upper and lower spray pipes 123 and rotatably connected to the outer periphery of the hollow pipe 124, a plurality of evenly distributed through holes 117 formed in the outer periphery of the spraying heads 125, and a plurality of evenly distributed spray heads two 131 installed on the outer periphery of the middle part of the spraying heads 125, wherein the spray heads two 131 are necked spray heads, and the spray pipes 123 and the spraying heads 125 are in communication with the inside of the hollow pipe 124.

[0050] Further, in specific implementation, after the water liquid enters the inside of the hollow pipe 124 through the rotary joint 133, it further enters the inside of the spraying heads 125 and the spray pipes 123, part of the water liquid is sprayed out through the through holes 117 on the periphery of the spraying heads 125 to form a group of 360-degree water mist without dead angle, in this process, part of the water mist is sprayed out after being pressurized by the spray heads two 131, so that the spraying heads 125 start to rotate, so that each group of water mist starts to rotate, thereby further improving the coverage direction and interception rate of the water mist, at the same time, part of the water liquid is sprayed out through the spray pipes 123 to form an inclined direction of the reverse thrust, thereby driving the hollow pipe 124 to rotate as a whole, so that each group of intercepted water mist is driven to rotate around, continuously intercepting the flue gas continuously floating in the spraying bin 101, which is conducive to improving the contact volume of the flue gas and the water mist, thereby enabling the sulfur dioxide in the flue gas to fully react to complete deep desulfurization treatment.

[0051] The top of the air inlet 116 is provided with a top bin 110, the top of the top bin 110 is provided with a water outlet pipe two 111, the bottom of the top bin 110 is fixedly connected with uniformly distributed communication plates 136, the bottom of each communication plate 136 is fixedly connected with a spray pipe 128, the bottom of the spray pipe 128 is provided with a reserved port 132, the inside of the spray pipe 128 is rotatably connected with an inner pipe 135, a plurality of spray ports 129 are formed in the outer circumferential middle part of the inner pipe 135, each spray port 129 is provided in different shapes, the spray pipe 128 is provided with a stepping motor at both sides, the driving end of the stepping motor is fixedly connected with the end of the inner pipe 135, the bottom of the top bin 110 is provided with uniformly distributed air holes 137, and the bottom of the air hole 137 penetrates the top of the air inlet 116.

[0052] Further, in specific implementation, people can extract limestone water through the pump bin 108, and guide into the liquid storage bin 113 through the feeding pipe 107, at the same time, the flue gas generated by the calcination furnace can be guided through the air inlet pipe 109, so that the flue gas can be guided into the air inlet 116, and part of the limestone water can be guided into the top bin 110 through the water outlet pipe two 111 by the working of the pump bin 108, and the water can be sprayed down through the air holes 137 at the bottom of the top bin 110, so as to realize the spraying treatment of the entering flue gas, so as to directly intercept the residual particulate impurities in the flue gas, and at the same time, the water in the top bin 110 can be extracted and guided into the spray pipe 128 through the communication plate 136, and the water can be further guided into the inner pipe 135 through the spray pipe 128, and the pressurized water can be sprayed down through the spray port 129 at the bottom of the inner pipe 135, so as to form multiple interception water curtains and flushing water flow in the air inlet 116, and the interception water curtain can realize the preliminary purification and desulfurization work when the flue gas is most concentrated and condensed, at the same time, the end motor of the spray pipe 128 can drive the inner pipe 135 to rotate, the rotation of the inner pipe 135 can adjust the spray port 129 corresponding to the reserved port 132, and different spray ports 129 can adjust the fineness of the interception water curtain, which is helpful to deal with different dust content of the flue gas, and is helpful to improve the interception effect of the particulate impurities in the flue gas.

[0053] The bottom of the hollow pipe 124 penetrates the lower rotary joint 133, the bottom of the hollow pipe 124 is connected with a speed reducer 130, the middle of the liquid storage bin 113 is fixedly connected with a vertical cylinder 114, the outer circumferential middle part of the vertical cylinder 114 is fixedly connected with a guide plate 112, the guide plate 112 is provided with uniformly distributed filter holes, the outer circumferential middle part of the vertical cylinder 114 is provided with uniformly distributed openings 115, the top of the opening 115 is fixedly connected with a speed reducer 130, the inside of the vertical cylinder 114 is provided with an auger 122, the top of the auger 122 is fixedly connected with the bottom output end of the speed reducer 130, one side of the upper part of the vertical cylinder 114 is fixedly connected with a discharge pipe 106, and the discharge pipe 106 is arranged on one side of the lower part of the spray bin 101.

[0054] Further, in specific implementation, the calcium sulfite generated after the reaction will fall back to the guide plate 112 with the sprayed slurry. The guide plate 112 can realize the support and filtration of the back-falling slurry, so as to leave the impurities in the slurry and the generated calcium sulfite on the top of the guide plate 112, and make the water liquid return to the liquid storage bin 113. The generated calcium sulfite in the flue gas desulfurization process can be concentrated in the vertical cylinder 114 through the guidance of the guide plate 112. In this process, when the hollow pipe 124 is driven to rotate by the spray pipe 123, the speed reducer 130 drives the auger 122 inside the vertical cylinder 114 to rotate. The precipitate inside the vertical cylinder 114 is lifted by the auger 122, so that the precipitate in the vertical cylinder 114 can be guided into the discharge pipe 106. The precipitate can be discharged from the desulfurization tower through the discharge pipe 106, which is convenient for subsequent recycling work. The continuously generated calcium sulfite does not affect the concentration of the water liquid in the liquid storage bin 113, and does not affect the subsequent extraction and spraying desulfurization work.

[0055] The pump bin 108 is connected with an external water supplement device at the input end, the spray bin 101 is provided with an air inlet 116 at one side, the air inlet 116 is connected with an air inlet pipe 109 at the end, the air inlet pipe 109 is connected with a calcination kiln flue gas passage at the end, a plurality of demisters 120 are installed in the demisting bin 102, a condensing cone 121 is installed at the top inside the exhaust cylinder 103, a photovoltaic panel is installed at the top of the condensing cone 121, and exhaust holes 104 are evenly arranged on the top outside of the exhaust cylinder 103.

[0056] Further, in specific implementation, after the flue gas enters the inside of the spray bin 101, the spraying work can be further carried out by the ring frame 119 and the spraying head 125 inside the desulfurization tower, the water can be guided into the ring frame 119 and the hollow pipe 124 through the water outlet pipe one 105 and the guide pipe 134, the spraying head one 118 on the upper and lower parts of the ring frame 119 can realize the spraying of the upper and lower spaces, the water sprayed by the upper spraying head one 118 can wash the demister 120 on the upper part, and the water remaining on the demister 120 can demist the gas floating upwards, which is helpful to improve the purity of the subsequent discharged gas, the water sprayed by the lower spraying head one 118 can wash the equipment on the lower part, so that the slurry mixture after reaction can flow back to the guide plate 112 as soon as possible, which is helpful to continuous work. After the desulfurization treatment, the gas will continue to float after removing the water mist by the demister 120, enter the inside of the exhaust cylinder 103, and the condensation and dehydration of the discharged gas can be realized by the work of the condensing cone 121 inside the exhaust cylinder 103, so as to further reduce the water content of the discharged gas and the consumption of treatment water, which is helpful to actual use. When the external light intensity is high and the temperature is high, the photovoltaic panel at the top of the condensing cone 121 can absorb light energy, and the semiconductor refrigerator inside the condensing cone 121 can be started by the inverter to realize further refrigeration of the condensing cone 121, improve the condensation effect of the condensing cone 121 at high temperature, and be helpful to actual use.

[0057] The method comprises the following operation steps:

[0058] S1, desulfurizer preparation and introduction:

[0059] Start the pump bin 108, draw the limestone water through the external water supplementing device connected to the input end of the pump bin 108, and then transport the limestone water to the liquid storage bin 113 through the feed pipe 107 at the output end of the pump bin 108, until the concentration of the slurry in the liquid storage bin 113 reaches the working standard of 20%-30%;

[0060] S2, flue gas introduction and initial purification:

[0061] S2.1, open the flue gas channel of the baking furnace, so that the flue gas enters the gas inlet 116 through the gas inlet pipe 109;

[0062] S2.2, simultaneously start the pump bin 108, and transport part of the limestone water in the liquid storage bin 113 to the top bin 110 through the water outlet pipe two 111, and a part of the water is directly sprayed into the gas inlet 116 through the air hole 137 at the bottom of the top bin 110 to intercept the initial high-concentration particulate impurities in the flue gas;

[0063] S2.3, another part of water liquid enters the spray pipe 128 through the communication plate 136 at the bottom of the top bin 110, and then flows into the inner pipe 135 in the spray pipe 128, the step motor at the end of the spray pipe 128 is started, the inner pipe 135 is driven to rotate, the spray opening 129 with different shapes on the outer periphery of the inner pipe 135 corresponds to the reserved opening 132 at the bottom of the spray pipe 128, so that the water liquid forms an interception water curtain suitable for the dust content of flue gas, and initial desulfurization and dust removal of flue gas are completed;

[0064] S3, deep desulfurization treatment:

[0065] S3.1, the flue gas purified through the initial purification enters the spray bin 101, and the pump bin 108 is started to divide the limestone water liquid in the liquid storage bin 113 through the water outlet pipe one 105:

[0066] ① a part of water liquid directly enters the ring frame 119, and is sprayed through the spray head one 118 on the upper and lower parts of the ring frame 119, the upper spray head one 118 washes the demister 120 in the demisting bin 102 and forms a water film, and the lower spray head one 118 washes the equipment at the lower part of the spray bin 101;

[0067] ② another part of water liquid enters the hollow pipe 124 through the guide pipe 134 and the rotary joint 133 in the middle of the water outlet pipe one 105, a part of water liquid flows into the spray head 125 on the outer periphery of the hollow pipe 124, forms 360° water mist through the through hole 117 on the outer periphery of the spray head 125, and simultaneously sprays water through the spray head two 131 in the middle of the spray head 125 to drive the spray head 125 to rotate;

[0068] ③ another part of water liquid flows into the spray pipe 123 on the outer periphery of the hollow pipe 124, is sprayed obliquely through the spray pipe 123 to generate a reverse thrust, drives the hollow pipe 124 to rotate as a whole around the rotary joint 133, forms a dynamic surrounding water mist, and fully contacts with the flue gas floating upwards in the spray bin 101, so that deep reaction of sulfur dioxide is completed;

[0069] S4, calcium sulfite separation and recovery:

[0070] S4.1, the calcium sulfite generated by reaction falls back to the guide plate 112 on the upper part of the liquid storage bin 113 with slurry, is filtered through the filter hole on the guide plate 112, flows back to the liquid storage bin 113 for recycling, and the calcium sulfite and impurities are guided through the guide plate 112 and enter the vertical cylinder 114 through the opening 115 on the outer periphery of the vertical cylinder 114;

[0071] S4.2, when the hollow pipe 124 rotates, the speed reducer 130 connected at the bottom of the hollow pipe 124 is started synchronously, drives the auger 122 in the vertical cylinder 114 to rotate, and upwardly conveys the calcium sulfite precipitate in the vertical cylinder 114 to be discharged through the discharge pipe 106 on the upper part of one side of the vertical cylinder 114, so that the calcium sulfite recovery is completed;

[0072] S5, demisting and exhaust treatment:

[0073] S5.1, the flue gas after deep desulfurization continues to float and pass through the mist eliminator 120 in the mist elimination bin 102 to remove water mist in the flue gas;

[0074] S5.2, then the flue gas enters the exhaust cylinder 103, and the condensing cone 121 at the top of the exhaust cylinder 103 is started to condense and dehydrate the flue gas; if the external light is strong and the temperature is high, the photovoltaic panel at the top of the condensing cone 121 absorbs light energy, the semiconductor refrigerator inside the condensing cone 121 is started through an inverter, and the condensing effect is strengthened, and finally the purified flue gas is discharged through the exhaust hole 104 outside the top of the exhaust cylinder 103;

[0075] S6, system circulation and maintenance:

[0076] The concentration of slurry in the liquid storage bin 113 is continuously monitored, and limestone water is supplemented in time through the pump bin 108; the inner wall of the spray bin 101 is regularly washed through the spray head one 118 at the lower part of the ring frame 119 to avoid slurry residue and scaling, and ensure the continuous and stable operation of the system.

[0077] Working principle:

[0078] In actual use, people can extract limestone water through the pump bin 108, and guide it into the storage bin 113 through the feed pipe 107, and guide the flue gas generated by the calcination furnace through the air inlet pipe 109, so that the flue gas can be guided into the air inlet 116, and part of the limestone water can be guided into the top bin 110 through the water outlet pipe two 111 by the working of the pump bin 108, and the water can be sprayed down through the air hole 137 at the bottom of the top bin 110, realizing the spray treatment of the entering flue gas, so as to directly intercept the residual particulate impurities in the flue gas, and the water in the top bin 110 can be extracted and guided into the spray pipe 128 through the communication plate 136, and the water can be further guided into the inner tube 135 through the spray pipe 128, and the pressurized water can be sprayed down through the spray port 129 at the bottom of the inner tube 135, so as to form multiple interception water curtains and flushing water flow in the air inlet 116, and the interception water curtain can realize the preliminary purification and desulfurization work when the flue gas is most concentrated and condensed, and the end motor of the spray pipe 128 can drive the inner tube 135 to rotate, and the spray port 129 corresponding to the reserved port 132 can be adjusted by the rotation of the inner tube 135, and the fineness of the interception water curtain can be adjusted by different spray ports 129, which is helpful to deal with different dust content of flue gas, and is helpful to improve the interception effect of particulate impurities in flue gas, after the flue gas enters the spray bin 101, the ring frame 119 and the spray head 125 in the desulfurization tower can further spray, and the water can be guided into the ring frame 119 and the hollow tube 124 through the water outlet pipe one 105 and the guide pipe 134, and the spray head one 118 on the upper and lower parts of the ring frame 119 can realize the spray on the upper and lower spaces, and the upper spray head one 118 can spray water to flush the demister 120 on the upper part, and the water remaining on the demister 120 can demist the gas floating above, which is helpful to improve the purity of the subsequent discharged gas, and the water sprayed by the lower spray head one 118 can flush the equipment below, so that the reacted slurry mixture can flow back to the guide plate 112 as soon as possible, which is helpful to continuous work, after the water enters the hollow tube 124 through the rotary joint 133, it will further enter the spray head 125 and the spray pipe 123, part of the water will be sprayed through the through hole 117 on the periphery of the spray head 125, forming a group of 360-degree water mist without dead angle, in this process, part of the water mist will be sprayed after being pressurized by the spray head two 131, so that the spray head 125 will start to rotate, so that each group of water mist will start to rotate, so as to further improve the coverage direction and interception rate of the water mist, and part of the water will be sprayed through the spray pipe 123, so as to form an inclined direction of the thrust, so as to drive the hollow tube 124 to rotate as a whole, so that each group of intercepted water mist will be driven to rotate around, continuously intercepting the continuously floating flue gas in the spray bin 101, which is helpful to improve the contact volume of flue gas and water mist,Thus, the sulfur dioxide in the flue gas can be fully reacted, and the deep desulfurization treatment is completed. The calcium sulfite generated after the reaction falls back to the guide plate 112 with the sprayed slurry. The guide plate 112 can realize the support and filtration of the back-falling slurry, so that the impurities in the slurry and the generated calcium sulfite are left on the top of the guide plate 112, and the water liquid can return to the liquid storage bin 113. The generated calcium sulfite in the flue gas desulfurization process can be concentrated in the vertical cylinder 114 through the guidance of the guide plate 112. In this process, when the hollow pipe 124 is driven to rotate by the spray pipe 123, the speed reducer 130 drives the auger 122 in the vertical cylinder 114 to rotate. The auger 122 drives the precipitate in the vertical cylinder 114 to move upwards, so that the precipitate in the vertical cylinder 114 can be guided into the discharge pipe 106. The discharge pipe 106 can guide it out of the desulfurization tower, which is convenient for subsequent recycling work. The continuously generated calcium sulfite does not affect the concentration of the water liquid in the liquid storage bin 113, and does not affect the subsequent extraction and spray desulfurization work. After the desulfurization treatment, the gas continuously floats after the water mist is removed by the demister 120, enters the exhaust cylinder 103, and the condensation and dehydration work of the exhaust gas can be realized through the work of the condensing cone 121 in the exhaust cylinder 103. Thus, the water content of the exhaust gas can be further reduced, the consumption of treatment water is further reduced, which is beneficial to actual use. The photovoltaic panel at the top of the condensing cone 121 can absorb light energy when the external light intensity is high, and start the semiconductor refrigerator in the condensing cone 121 through the inverter, realize the further refrigeration of the condensing cone 121, improve the condensation effect of the condensing cone 121 at high temperature, which is beneficial to actual use.

[0079] The above shows and describes the basic principles, main features and advantages of the present application. Those skilled in the art should understand that the present application is not limited to the above embodiments, and the above embodiments and descriptions in the specification are only the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the claimed present application. The scope of protection claimed by the present application is defined by the appended claims and their equivalents.

Claims

1. A pre-baked anode baking furnace flue gas desulfurization device comprising a spraying bin (101), characterized in that: The spray bin (101) top is equipped with a demisting bin (102), the demisting bin (102) top is equipped with an exhaust cylinder (103), the spray bin (101) bottom is equipped with a liquid storage bin (113), the liquid storage bin (113) outer periphery one side is equipped with a pump bin (108), the pump bin (108) output end is connected with a feed pipe (107), a water outlet pipe one (105) and a water outlet pipe two (111) respectively, the pump bin (108) input end is connected with an external water supplement device, the water outlet pipe one (105) top is fixedly connected with a ring frame (119), the ring frame (119) is installed in the demisting bin (102) inner bottom, the ring frame (119) upper and lower parts are all equipped with evenly distributed spray heads one (118), the water outlet pipe one (105) middle part one side is fixedly connected with a guide pipe (134), the guide pipe (134) far away from the water outlet pipe one (105) one end is fixedly connected with a rotary joint (133), the rotary joint (133) bottom is rotatably connected with a hollow pipe (124), the spray bin (101) inner upper and lower parts are all fixedly connected with fixed rings (127), the fixed rings (127) inner side is fixedly connected with evenly distributed fixed plates (126), the fixed plates (126) far away from the fixed rings (127) one end are all fixedly connected on the rotary joint (133) outer periphery, the hollow pipe (124) outer periphery middle part is fixedly connected with evenly distributed spray pipes (123), the spray pipes (123) between upper and lower parts are all provided with spray heads (125), the spray heads (125) are all rotatably connected on the hollow pipe (124) outer periphery, the spray heads (125) outer periphery are all provided with evenly distributed through holes (117), the spray heads (125) outer periphery middle part are all equipped with evenly distributed spray heads two (131), the spray pipes (123) and the spray heads (125) are all connected with the hollow pipe (124) inside, the spray bin (101) one side is equipped with an air inlet (116), the air inlet (116) tail end is connected with an air inlet pipe (109), the air inlet pipe (109) tail end is connected with a calcination kiln flue gas passage, the air inlet (116) top is equipped with a top bin (110), the top bin (110) top is equipped with a water outlet pipe two (111), the top bin (110) bottom is fixedly connected with evenly distributed communication plates (136), the communication plates (136) bottom are all fixedly connected with spray pipes (128), the spray pipes (128) bottom are all provided with reserved openings (132), the spray pipes (128) inside are all rotatably connected with inner pipes (135), the inner pipes (135) outer periphery middle part are all provided with multiple spray openings (129), each spray opening (129) is provided as different shapes, the spray pipes (128) inside both sides end parts are all equipped with stepper motors, the stepper motors driving ends are all fixedly connected with the inner pipes (135) end parts, the top bin (110) bottom is provided with evenly distributed air holes (137), the air holes (137) bottom all penetrate the air inlet (116) top.

2. A flue gas desulphurization device for a prebaked anode baking furnace according to claim 1, characterized in that: The hollow pipe (124) bottom penetrates through the lower rotary joint (133), and the hollow pipe (124) bottom is connected with a speed reducer (130).

3. A flue gas desulphurization device for a prebaked anode baking furnace according to claim 2, characterized in that: The vertical cylinder (114) is fixedly connected with a guide plate (112) on the middle upper portion of the outer periphery of the vertical cylinder (114), and the guide plate (112) is provided with uniformly distributed filter holes.

4. A flue gas desulphurization device for a prebaked anode baking furnace according to claim 3, characterized in that: The vertical cylinder (114) is provided with uniformly distributed openings (115) on the middle upper portion of the outer periphery of the vertical cylinder (114), the openings (115) are fixedly connected with a speed reducer (130) on the top portion of the openings (115), the vertical cylinder (114) is internally provided with an auger (122), the auger (122) is fixedly connected with the bottom output end of the speed reducer (130) on the top portion of the auger (122), and the vertical cylinder (114) is fixedly connected with a discharge pipe (106) on the upper portion of one side of the vertical cylinder (114).

5. A flue gas desulphurization device for a prebaked anode baking furnace according to claim 4, characterized in that: The mist removal bin (102) is internally provided with a plurality of mist removal devices (120), the exhaust cylinder (103) is internally provided with a condensing cone (121) on the top portion of the exhaust cylinder (103), the condensing cone (121) is provided with a photovoltaic panel on the top portion of the condensing cone (121), and the exhaust cylinder (103) is provided with uniformly distributed exhaust holes (104) on the top portion of the outer side of the exhaust cylinder (103).

6. A method for flue gas desulfurization of a prebaked anode baking furnace, applied to the flue gas desulfurization device of the prebaked anode baking furnace according to claim 5, characterized in that: The following operation steps are included: S1, desulfurizer preparation and introduction: The pump bin (108) is started, limestone water liquid is extracted through an external water supplement device connected to the input end of the pump bin (108), and then the limestone water liquid is transported to the liquid storage bin (113) through the feed pipe (107) of the output end of the pump bin (108), until the slurry concentration in the liquid storage bin (113) reaches the working standard of 20%-30%; S2, flue gas introduction and initial purification: S2.1, open the flue gas passage of the calcination kiln, so that the flue gas enters the gas inlet (116) through the gas inlet pipe (109); S2.2, at the same time, start the pump bin (108), and transport part of the limestone water liquid in the liquid storage bin (113) to the top bin (110) through the water outlet pipe two (111), and part of the water liquid is directly sprayed into the gas inlet (116) through the air holes (137) at the bottom of the top bin (110), to intercept the initial high-concentration particulate impurities in the flue gas; S2.3, another part of the water liquid enters the spraying pipe (128) through the communication plate (136) at the bottom of the top bin (110), and then flows into the inner pipe (135) in the spraying pipe (128), the stepping motor at the end of the spraying pipe (128) is started, the inner pipe (135) is driven to rotate, the spraying openings (129) of different shapes on the outer periphery of the inner pipe (135) are adjusted to correspond to the reserved openings (132) at the bottom of the spraying pipe (128), so that the water liquid forms an interception water curtain suitable for the dust content of the flue gas, and the initial desulfurization and dust removal of the flue gas are completed; S3, deep desulfurization treatment: S3.1, the flue gas after the initial purification enters the spraying bin (101), and the pump bin (108) divides the limestone water liquid in the liquid storage bin (113) into two parts through the water outlet pipe one (105): ①A part of water directly enters the ring frame (119), and is sprayed through the upper and lower spray nozzles (118) of the ring frame (119). The upper spray nozzles (118) wash the demister (120) in the demisting bin (102) and form a water film. The lower spray nozzles (118) wash the lower equipment in the spray bin (101); ②Another part of the water passes through the guide pipe (134) in the middle of the water outlet pipe (105) and the rotating joint (133) into the hollow pipe (124). A part of the water flows into the spray head (125) outside the periphery of the hollow pipe (124), forms a 360° water mist through the through holes (117) outside the periphery of the spray head (125), and simultaneously sprays water through the spray nozzles (131) in the middle of the spray head (125) to drive the spray head (125) to rotate; ③Another part of the water flows into the spray pipe (123) outside the periphery of the hollow pipe (124), is sprayed obliquely through the spray pipe (123) to generate a counter thrust, drives the hollow pipe (124) to rotate as a whole around the rotating joint (133), forms a dynamic surrounding water mist, fully contacts with the smoke floating upwards in the spray bin (101), and completes deep reaction of sulfur dioxide; S4, calcium sulfite separation and recovery: S4.1, The calcium sulfite generated in the reaction falls back to the guide plate (112) on the upper part of the storage bin (113) with the slurry, is filtered through the filter holes on the guide plate (112), and the water returns to the storage bin (113) for recycling. The calcium sulfite and impurities are guided through the guide plate (112) and enter the vertical cylinder (114) through the openings (115) outside the periphery of the vertical cylinder (114); S4.2, When the hollow pipe (124) rotates, the speed reducer (130) connected to the bottom of the hollow pipe (124) is started synchronously, drives the auger (122) in the vertical cylinder (114) to rotate, and feeds the calcium sulfite precipitate in the vertical cylinder (114) upwards. The calcium sulfite is discharged through the discharge pipe (106) on the upper part of one side of the vertical cylinder (114), and the recovery of the calcium sulfite is completed; S5, demisting and exhaust treatment: S5.1, The flue gas after deep desulfurization continues to float upwards, passes through the demister (120) in the demisting bin (102), and removes the water mist in the flue gas; S5.2, Then the flue gas enters the exhaust cylinder (103), and the condensing cone (121) on the top of the exhaust cylinder (103) is started to condense and dehydrate the flue gas. If the external light is strong and the temperature is high, the photovoltaic panel on the top of the condensing cone (121) absorbs light energy, the semiconductor refrigerator inside the condensing cone (121) is started through an inverter, and the condensing effect is strengthened. Finally, the purified flue gas is discharged through the exhaust hole (104) on the top outside of the exhaust cylinder (103); S6, system circulation and maintenance: The concentration of the slurry in the storage bin (113) is continuously monitored, and the limestone water is supplemented in time through the pump bin (108); the inner wall of the spray bin (101) is regularly washed through the lower spray nozzles (118) of the ring frame (119) to avoid residue and scaling of the slurry, and the continuous and stable operation of the system is ensured.

Images