Hydrofluoric acid tail gas treatment device based on ecological protection

Abstract

The embodiment of the invention provides a hydrofluoric acid tail gas treatment device based on ecological protection, and relates to the technical field of hydrofluoric acid tail gas treatment. A hydrofluoric acid tail gas treatment device based on ecological protection comprises a neutralization tank, an absorption tank and an adsorption tank, the neutralization tank, the absorption tank and the adsorption tank are communicated through a feeding pipe with a one-way valve, and the bottom end of the neutralization tank is communicated with a filling port with a one-way valve, a liquid discharge port and a first waste discharge port. The absorption tank and the adsorption tank are also respectively communicated with a filling port with a one-way valve and a second waste discharge port, the bottom of the neutralization tank is fixedly connected with a cylinder barrel through a bracket, the outer side of the adsorption tank is fixedly connected with a negative pressure frame, and the outer side of the absorption tank is fixedly connected with a fixed frame; and a rotational flow assembly is arranged in the neutralization tank. Harmful substances in the hydrofluoric acid tail gas are effectively eliminated by adopting a combination means of integrating neutralization, absorption, trapping, adsorption and purification, so that the ultra-clean hydrofluoric acid tail gas meeting the emission standard is obtained.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of hydrofluoric acid tail gas treatment, and particularly relates to a hydrofluoric acid tail gas treatment device based on ecological protection. BACKGROUND

[0002] Hydrofluoric acid is an aqueous solution of hydrogen fluoride gas, a clear, colorless corrosive liquid with a strong pungent odor. It is a weak acid, but has extremely strong corrosive properties, which can corrode metals, glass and silicon-containing substances such as quartz. Due to its strong corrosive properties, hydrofluoric acid is particularly destructive to glass. Hydrofluoric acid (HF) tail gas treatment is an important environmental protection problem faced by the chemical, electronic, metallurgical and other industries. HF has strong corrosive and toxic properties, and high-efficiency treatment technology must be used to ensure that it meets the emission standards.

[0003] In the prior art (patent application with the patent name of a device for treating hydrofluoric acid tail gas and the announcement number of CN213824109U), hydrofluoric acid and potassium hydroxide are used to generate potassium fluoride, which can be sold. The circulating sedimentation tank can recover the generated crystals in the absorption tower, and the multi-stage absorption tower can better purify the potassium fluoride. In the process of implementing this technical solution, it is found that at least the following problems exist in the prior art:

[0004] When treating the tail gas generated during the production of hydrofluoric acid, the tail gas is generally treated by a multi-stage absorption tower or a spray tower. Such equipment generally occupies a large area, and the tail gas is absorbed by three or more absorption towers in stages. Since the hydrofluoric acid tail gas not only contains harmful substances, but also generates aerosol particles and even yellow smoke during treatment, simply using multi-stage absorption cannot effectively eliminate the harmful substances in the hydrofluoric acid tail gas, and the cycle is long and the efficiency is low. SUMMARY

[0005] The present application aims to at least solve one of the technical problems in the prior art that the harmful substances in the hydrofluoric acid tail gas cannot be effectively eliminated by using a combination of neutralization, absorption, capture, adsorption and purification. To this end, the present application provides a hydrofluoric acid tail gas treatment device based on ecological protection.

[0006] To achieve the above-mentioned purpose, the specific technical solutions of the present application are as follows:

[0007] A hydrofluoric acid tail gas treatment device based on ecological protection includes a neutralization tank, an absorption tank, and an adsorption tank. The neutralization tank, the absorption tank, and the adsorption tank are connected by a feed pipe with a one-way valve. The bottom end of the neutralization tank is respectively connected to a filling port, a liquid discharge port, and a first waste outlet with a one-way valve. The absorption tank and the adsorption tank are also respectively connected to a filling port and a second waste outlet with a one-way valve. The bottom of the neutralization tank is fixedly connected to a cylinder barrel via a bracket. The outer side of the adsorption tank is fixedly connected to a negative pressure frame, and the outer side of the absorption tank is fixedly connected to a fixed frame.

[0008] The neutralization tank is provided with a swirl assembly, and the swirl assembly includes a double-headed motor embedded in the bottom of the neutralization tank. The cylinder barrel is provided with a supply assembly used in conjunction with the swirl assembly, and the supply assembly includes a three-way valve connected to the cylinder barrel, the inner end of the three-way valve is connected to a supply angle pipe with a one-way valve, and the top end of the supply angle pipe is respectively connected to a neutralization liquid tank, an active agent tank, and a removal agent tank fixedly matched with the neutralization tank;

[0009] An absorption assembly and a capture assembly are respectively provided in the absorption tank, and the absorption assembly includes a stirring frame rotating in the absorption tank, and the stirring frame is distributed in a triangular equidistant shape and has open slots, and the capture assembly includes an interlaced cylinder sliding in the absorption tank and the fixed frame. An adsorption assembly is provided in the adsorption tank, and the adsorption assembly includes a guide bar fixed in the adsorption tank.

[0010] Preferably: the swirl assembly also includes a spiral rack fixed on one output shaft of the double-headed motor and adopts a hollow structure design, and spray holes are spirally opened around the spiral rack, the top of the spiral rack is connected to a connecting end, and a first main gear is fixedly connected to the other output shaft of the double-headed motor, the outer side of the first main gear is engaged with a first sub-gear, and the outer side of the first sub-gear is fixedly connected to a short rotating rod.

[0011] Preferably: the supply assembly also includes a swing arm fixed on the outside of the short rotating rod, and the outside of the swing arm is hinged with a connecting rod, the outside of the connecting rod is hinged with a piston that slides with the cylinder, and the top of the three-way valve is connected to a pressurized pipe that penetrates and cooperates with the neutralization tank, the inner end of the pressurized pipe is connected to a liquid distribution rack that is fixedly matched with the neutralization tank, and the inner end of the liquid distribution rack is connected to a rotating end that rotates with the connecting end and maintains a state of mutual communication with each other.

[0012] Preferably: the absorption component also includes a planetary gear fixed on the short rotating rod, and the planetary gear is meshed with a differential gear, the top of the differential gear is fixedly connected to the long rotating rod, and the top of the long rotating rod is fixedly connected to the second sub-gear, the inner side of the second sub-gear is meshed with a gear rack, and the inner side of the gear rack is meshed with a second main gear fixedly matched with the stirring rack.

[0013] Preferably: the capture assembly also includes two worm sections fixed on the top of the long rotating rod, and one side of the worm is engaged with a worm wheel that rotates with the fixed frame, the inner side of the worm wheel is fixedly connected to a short reciprocating screw, and a reciprocating screw groove that cooperates with the thread of the short reciprocating screw is opened in the insertion cylinder, a conductive probe is embedded in the inner side of the insertion cylinder, and a high-voltage electric field generator used in conjunction with the conductive probe is fixedly connected to the outer side of the fixed frame.

[0014] Preferably: the adsorption assembly also includes a long reciprocating screw fixed to the top of the stirring frame, and a screw sleeve is threadedly connected to the long reciprocating screw, the outer side of the screw sleeve is fixedly connected to an annular frame, and the outer side of the annular frame is provided with a guide rail groove that slides with the guide rail bar, the upper and lower sides of the inner cavity of the annular frame are fixedly connected with activated carbon adsorption plates that are fixed with the screw sleeve, and modified alumina balls are filled between the activated carbon adsorption plates.

[0015] Preferably, the neutralizing liquid tank, activating agent tank and removing agent tank are respectively filled with sodium hydroxide solution, sodium dodecyl sulfate surfactant and yellow smoke remover containing sulfur complex, and liquid level sensors are embedded in the neutralizing liquid tank, activating agent tank and removing agent tank.

[0016] Preferably: a turbulent blade is fixedly connected to one side of the long rotating rod close to the neutralization liquid tank, the active agent tank and the remover tank, and a first-stage partition filter, a second-stage partition filter and a third-stage partition filter are embedded in the neutralization tank, the absorption tank and the adsorption tank respectively.

[0017] Preferably, the absorption tank is filled with ball ring fillers used in conjunction with the stirring frame and the interspersed tubes, and the ball ring fillers are separated by two sets of secondary partition filters distributed up and down in the absorption tank, and the interspersed tubes are distributed in a triangular staggered state along the central axis of the absorption tank.

[0018] Preferably: the absorption tank is provided with sliding openings on all sides, and the outer side of the interpenetrating cylinder is fixedly connected with a sliding bar that slides with the sliding opening, the upper and lower sides of the stirring frame are fixedly connected with a primary guide vane that cooperates with the absorption tank turbulence, and the upper and lower sides of the long reciprocating screw are fixedly connected with a secondary guide vane that cooperates with the adsorption tank turbulence.

[0019] The hydrofluoric acid tail gas treatment device based on ecological protection of the present invention has the following advantages:

[0020] 1. This hydrofluoric acid tail gas treatment device based on ecological protection first drives the spiral frame to rotate in the neutralization tank by a double-headed motor, and at the same time drives the three groups of first sub-gears on the first main gear to rotate synchronously, and the three groups of first sub-gears drive the three short rotating rods to rotate accordingly. At the same time, the three short rotating rods drive the three groups of pistons to perform reciprocating work in the three groups of cylinders through the connecting rods on the three groups of swing arms. Then, according to the current treatment needs, under the cooperation of the reciprocating work of the pistons in the cylinders, the sodium hydroxide solution in the neutralization liquid tank, the activator tank or the remover tank is correspondingly supplied through the supply angle tube on the three-way valve. , sodium dodecyl sulfonate surfactant, or yellow smoke remover of sulfur-containing complex is supplied into the pressurized pipe, and then supplied into the spiral rack with a hollow structure design through the rotating end and the connecting end on the liquid distribution rack, and then the sodium hydroxide solution, sodium dodecyl sulfonate surfactant, or yellow smoke remover of sulfur-containing complex is swirled and sprayed into the hydrofluoric acid tail gas area in the neutralization tank through the spray holes on the rotating spiral rack, so as to achieve efficient neutralization of the hydrofluoric acid tail gas, enhance the gas-liquid mass transfer effect of the hydrofluoric acid tail gas, and eliminate the yellow smoke generated by the reaction, thereby completing the neutralization, activation and smoke elimination of the hydrofluoric acid tail gas in the neutralization tank.

[0021] 2. This hydrofluoric acid tail gas treatment device based on ecological protection, then, first of all, three short rotating rods drive three sets of planetary gears and differential gears to rotate successively, the three sets of differential gears drive the second sub-gears on the three long rotating rods to rotate accordingly, the three sets of second sub-gears drive the second main gears to rotate through the three gear racks, the second main gear drives the stirring rack to stir the ball ring packing filled in the absorption tank, pre-absorb the hydrofluoric acid tail gas reaching the stirring rack, and reduce the concentration of the hydrofluoric acid tail gas. At the same time, the three long rotating rods drive the upper The three lower worms rotate synchronously, and the worms drive the short reciprocating screws on the worm wheel to rotate accordingly. The three short reciprocating screws drive the three groups of interlacing cylinders to perform reciprocating interlacing movements in the absorption tank through the reciprocating screw slots. Three groups of high-voltage electric field generators provide high-voltage electric field support for the three groups of conductive probes. The three groups of conductive probes that follow the reciprocating interlacing movements of the three groups of interlacing cylinders ionize and capture the aerosol particles formed by the hydrofluoric acid exhaust in the absorption tank, thereby achieving efficient absorption and ionization capture effects of the hydrofluoric acid exhaust and completing the absorption and capture of the hydrofluoric acid exhaust.

[0022] 3. This is a hydrofluoric acid tail gas treatment device based on ecological protection. Then, the stirring frame first drives the long reciprocating screw to rotate, and the guide rail bar and the guide rail groove play the role of sliding limit on the annular frame. The long reciprocating screw drives the annular frame through the screw sleeve to perform reciprocating lifting and lowering motion in the adsorption tank. The annular frame drives the upper and lower distributed activated carbon adsorption plates to perform reciprocating pressure filtration and adsorption on the hydrofluoric acid tail gas reaching the adsorption tank, and the modified alumina balls between the activated carbon adsorption plates achieve synchronous adsorption of the passing hydrofluoric acid tail gas, completing the double adsorption of the hydrofluoric acid tail gas. Work, finally, the three long rotating rods drive the three upper and lower worm gears to rotate, while the worm gears also drive the negative pressure fans on the three middle rotating rods to rotate in the three groups of negative pressure frames and generate negative pressure suction. Under the action of negative pressure suction, the hydrofluoric acid tail gas after neutralization, absorption, capture and adsorption in the adsorption tank is sucked into the three negative pressure long tubes through the three negative pressure angle tubes, and then aerated and diluted by the aeration holes on the three aeration pipes and the pure water in the three groups of purification tanks, which further reduces the concentration of the hydrofluoric acid tail gas while improving the cleanliness of the hydrofluoric acid tail gas, completing the purification of the hydrofluoric acid tail gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0024] Figure 1 This is a schematic structural diagram of a hydrofluoric acid tail gas treatment device based on ecological protection according to the present invention;

[0025] Figure 2 This is a cross-sectional view of the structure of a hydrofluoric acid tail gas treatment device based on ecological protection according to the present invention;

[0026] Figure 3 This is a bottom view of the structure of a hydrofluoric acid tail gas treatment device based on ecological protection according to the present invention;

[0027] Figure 4 It is a cross-sectional view of the structure of the neutralization tank, cylinder barrel, supply angle tube, neutralization liquid tank, active agent tank, remover tank, swirl assembly and supply assembly of the present invention;

[0028] Figure 5 A bottom view of the swirl assembly and supply assembly structure of the present invention;

[0029] Figure 6 It is a partial cross-sectional view of the neutralization tank, neutralization liquid tank, active agent tank, removal agent tank and cyclone assembly structure of the present invention;

[0030] Figure 7Structure of the cylinder, supply angle pipe and supply assembly of the present application is a bottom view;

[0031] Figure 8 Structure of the neutralizing tank of the present application is a sectional view;

[0032] Figure 9 Structure of the absorption tank, fixing frame, cyclone assembly, absorption assembly, trapping assembly and purification assembly of the present application is a sectional view;

[0033] Figure 10 Structure of the cyclone assembly, absorption assembly and trapping assembly of the present application is a front view;

[0034] Figure 11 Structure of the absorption assembly of the present application is a front view;

[0035] Figure 12 Structure of the trapping assembly of the present application is a front view;

[0036] Figure 13 Structure of the trapping assembly of the present application is a partially exploded sectional view;

[0037] Figure 14 Structure of the absorption tank of the present application is a sectional view;

[0038] Figure 15 Structure of the absorption tank, absorption assembly and adsorption assembly of the present application is a sectional view;

[0039] Figure 16 Structure of the absorption assembly and adsorption assembly of the present application is a bottom view;

[0040] Figure 17 Structure of the absorption assembly of the present application is a partially exploded view;

[0041] Figure 18 Structure of the absorption tank of the present application is a sectional view;

[0042] Figure 19 Structure of the absorption tank, negative pressure frame, absorption assembly and purification assembly of the present application is a sectional view;

[0043] Figure 20 Structure of the negative pressure frame and purification assembly of the present application is a top sectional view;

[0044] Figure 21 Structure of the purification assembly of the present application is a partially front view.

[0045] Explanation of the marks in the figure: 1. Neutralization tank; 2. Absorption tank; 3. Adsorption tank; 4. Feeding pipe; 5. Cylinder; 6. Negative pressure frame; 7. Fixed frame; 81. Double-head motor; 82. Screw frame; 83. Spray hole; 84. Connecting end; 85. First main gear; 86. First sub-gear; 87. Short rotating rod; 91. Swing arm; 92. Connecting rod; 93. Piston; 94. Three-way valve; 95. Pressurizing pipe; 96. Liquid distribution frame; 97. Rotating end; 101. Planetary gear; 102. Differential gear; 103. Long rotating rod; 104. Second sub-gear; 105. Gear frame; 106. Second main gear; 107. Stirring frame; 111. Worm; 112. Worm wheel; 113. Short reciprocating screw; 114. Inserting cylinder; 115. Reciprocating screw slot; 116. Conductive probe; 117, high-voltage electric field generator; 121, guide rail; 122, long reciprocating screw; 123, screw sleeve; 124, annular frame; 125, guide rail groove; 126, activated carbon adsorption plate; 127, modified alumina ball; 131, negative pressure angle tube; 132, transfer rod; 133, negative pressure fan; 134, negative pressure long tube; 135, aeration tube; 136, aeration hole; 137, purification box; 14, supply angle tube; 15, neutralization liquid tank; 16, activator tank; 17, removal agent tank; 18, liquid level sensor; 19, spoiler; 20, first-stage partition filter; 21, second-stage partition filter; 22, third-stage partition filter; 23, ball ring packing; 24, sliding mouth; 25, sliding bar; 26, first-stage guide vane; 27, second-stage guide vane. DETAILED DESCRIPTION

[0046] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments:

[0047] like Figures 1-21 As shown, a hydrofluoric acid tail gas treatment device based on ecological protection of the present invention includes a neutralization tank 1, an absorption tank 2 and an adsorption tank 3. The neutralization tank 1, the absorption tank 2 and the adsorption tank 3 are connected by a feeding pipe 4 with a one-way valve. The bottom end of the neutralization tank 1 is respectively connected to a filling port, a drain port and a first row of waste ports with a one-way valve. The absorption tank 2 and the adsorption tank 3 are also respectively connected to a filling port and a second row of waste ports with a one-way valve. The bottom of the neutralization tank 1 is fixedly connected to a cylinder barrel 5 through a bracket, the outer side of the adsorption tank 3 is fixedly connected to a negative pressure frame 6, and the outer side of the absorption tank 2 is fixedly connected to a fixing frame 7;

[0048] A swirl assembly is provided in the neutralization tank 1, and the swirl assembly includes a double-headed motor 81 embedded in the bottom of the neutralization tank 1. A supply assembly used in conjunction with the swirl assembly is provided on the cylinder barrel 5, and the supply assembly includes a three-way valve 94 connected to the cylinder barrel 5. The inner end of the three-way valve 94 is connected to a supply angle tube 14 with a one-way valve, and the top end of the supply angle tube 14 is respectively connected to a neutralization liquid tank 15, an activator tank 16 and a remover tank 17 fixedly matched with the neutralization tank 1, thereby achieving efficient neutralization of the hydrofluoric acid tail gas, enhancing the gas-liquid mass transfer effect of the hydrofluoric acid tail gas, and eliminating the yellow smoke generated by the reaction, thereby completing the neutralization, activation and smoke elimination work of the hydrofluoric acid tail gas in the neutralization tank 1;

[0049] An absorption component and a capture component are respectively provided in the absorption tank 2, and the absorption component includes a stirring frame 107 rotating in the absorption tank 2, and the stirring frame 107 is triangularly equidistantly distributed and has open grooves, and the capture component includes an interlaced cylinder 114 sliding in the absorption tank 2 and the fixed frame 7. An adsorption component is provided in the adsorption tank 3, and the adsorption component includes a guide bar 121 fixed in the adsorption tank 3, which stirs the ball ring filler 23 filled in the absorption tank 2, pre-absorbs the hydrofluoric acid tail gas reaching the stirring frame 107, reduces the concentration of the hydrofluoric acid tail gas, and ionizes and captures the aerosol particles formed by the hydrofluoric acid tail gas in the absorption tank 2, thereby simultaneously achieving efficient absorption and ionization capture effects of the hydrofluoric acid tail gas.

[0050] like Figure 4-Figure 18 As shown, the swirl assembly also includes a spiral rack 82 fixed on one output shaft of the double-headed motor 81 and adopts a hollow structure design, and the spiral rack 82 is spirally opened with spray holes 83 around it, and the top of the spiral rack 82 is connected to a connecting end 84, and the other output shaft of the double-headed motor 81 is fixedly connected to a first main gear 85, and the outer side of the first main gear 85 is engaged with a first sub-gear 86. The double-headed motor 81 drives the spiral rack 82 to rotate in the neutralization tank 1, and at the same time, the double-headed motor 81 drives the three groups of first sub-gears 86 on the first main gear 85 to rotate synchronously, and the outer side of the first sub-gear 86 is fixedly connected to a short rotating rod 87, and the three groups of first sub-gears 86 drive the three short rotating rods 87 to rotate accordingly;

[0051] The supply assembly also includes a swing arm 91 fixed to the outside of the short rotating rod 87, and a connecting rod 92 is hinged on the outside of the swing arm 91, and a piston 93 that slides with the cylinder barrel 5 is hinged on the outside of the connecting rod 92. The three short rotating rods 87 drive the three groups of pistons 93 to perform reciprocating work in the three groups of cylinder barrels 5 through the connecting rods 92 on the three groups of swing arms 91, and the top of the three-way valve 94 is connected to a pressurized pipe 95 that penetrates and cooperates with the neutralization tank 1. According to the current processing requirements, with the reciprocating work of the piston 93 in the cylinder barrel 5, the sodium hydroxide solution, sodium dodecyl sulfate surfactant, or sulfur-containing complex yellow smoke remover in the neutralizing liquid tank 15, the active agent tank 16 or the remover tank 17 is supplied into the pressurized pipe through the supply angle pipe 14 on the three-way valve 94. In 95, the inner end of the pressurizing tube 95 is connected to a liquid distribution rack 96 fixedly matched with the neutralization tank 1, and the inner end of the liquid distribution rack 96 is connected to a rotating end 97 rotatably matched with the connecting end 84 and they maintain a mutual communication state. Then, the liquid is supplied to the spiral rack 82 with a hollow structure design through the rotating end 97 and the connecting end 84 on the liquid distribution rack 96. Then, the sodium hydroxide solution, sodium dodecyl sulfate surfactant, or sulfur-containing complex yellow smoke remover is swirl-sprayed into the hydrofluoric acid tail gas area in the neutralization tank 1 through the spray hole 83 on the rotating spiral rack 82, thereby achieving efficient neutralization of the hydrofluoric acid tail gas, enhancing the gas-liquid mass transfer effect of the hydrofluoric acid tail gas, and eliminating the yellow smoke generated by the reaction, thereby completing the neutralization, activation and smoke elimination work of the hydrofluoric acid tail gas in the neutralization tank 1;

[0052] The neutralizing liquid tank 15, the activating agent tank 16 and the removing agent tank 17 are respectively filled with sodium hydroxide solution, sodium dodecyl sulfate surfactant, and yellow smoke remover of sulfur-containing complex. The sodium hydroxide solution, sodium dodecyl sulfate surfactant, or yellow smoke remover of sulfur-containing complex is swirled and sprayed into the hydrofluoric acid tail gas area in the neutralizing tank 1 to achieve efficient neutralization of the hydrofluoric acid tail gas, enhance the gas-liquid mass transfer effect of the hydrofluoric acid tail gas, and eliminate the yellow smoke generated by the reaction. Liquid level sensors 18 are embedded in the neutralizing liquid tank 15, the activating agent tank 16 and the removing agent tank 17 to monitor the liquid levels of the sodium hydroxide solution, sodium dodecyl sulfate surfactant, and yellow smoke remover of sulfur-containing complex in the neutralizing liquid tank 15, the activating agent tank 16 and the removing agent tank 17 in real time so as to replenish them in time.

[0053] The absorption assembly also includes a planetary gear 101 fixed on the short rotating rod 87, and a differential gear 102 is meshed on the planetary gear 101. The top of the differential gear 102 is fixedly connected to a long rotating rod 103, and the top of the long rotating rod 103 is fixedly connected to a second sub-gear 104. The three short rotating rods 87 drive the three sets of planetary gears 101 and the differential gear 102 to rotate successively, and the three sets of differential gears 102 drive the second sub-gear 104 on the three long rotating rods 103 to rotate accordingly. The inner side of the sub-gear 104 is meshed with a gear rack 105, and the inner side of the gear rack 105 is meshed with a second main gear 106 fixedly matched with the stirring rack 107. The three sets of second sub-gears 104 drive the second main gear 106 to rotate through the three gear racks 105. The second main gear 106 drives the stirring rack 107 to stir the ball ring packing 23 filled in the absorption tank 2, thereby pre-absorbing the hydrofluoric acid tail gas reaching the stirring rack 107 and reducing the concentration of the hydrofluoric acid tail gas.

[0054] The capture assembly also includes two sections of worm 111 fixed on the top of the long rotating rod 103, and one side of the worm 111 is engaged with a worm wheel 112 that rotates with the fixed frame 7. The inner side of the worm wheel 112 is fixedly connected with a short reciprocating screw 113. The three long rotating rods 103 drive the upper and lower three worms 111 to rotate synchronously. The worm 111 drives the short reciprocating screw 113 on the worm wheel 112 to rotate accordingly, and a reciprocating screw groove 115 with a threaded fit for the short reciprocating screw 113 is opened in the interpenetrating cylinder 114. The three short reciprocating screws 113 drive the three groups of interpenetrating cylinders 114 through the reciprocating screw groove 115. A reciprocating interlacing action is performed in the absorption tank 2, and a conductive probe 116 is embedded on the inner side of the interlacing cylinder 114, and a high-voltage electric field generator 117 used in conjunction with the conductive probe 116 is fixedly connected to the outer side of the fixing frame 7. The three groups of high-voltage electric field generators 117 provide high-voltage electric field support to the three groups of conductive probes 116. Then, the three groups of conductive probes 116 that follow the reciprocating interlacing action of the three groups of interlacing cylinders 114 ionize and capture aerosol particles formed by the hydrofluoric acid tail gas in the absorption tank 2, thereby simultaneously achieving efficient absorption and ionization capture effects of the hydrofluoric acid tail gas, and completing the absorption and capture of the hydrofluoric acid tail gas;

[0055] The long rotating rod 103 is fixedly connected with the turbulence blade 19 near one side of the neutralizing liquid tank 15, the active agent tank 16 and the removing agent tank 17, which can realize real-time stirring of the sodium hydroxide solution, the sodium dodecyl sulfonate surfactant and the yellow smoke removing agent containing sulfur compound in the neutralizing liquid tank 15, the active agent tank 16 and the removing agent tank 17, so as to prevent precipitation, and the neutralizing tank 1, the absorption tank 2 and the adsorption tank 3 are respectively embedded with the first separation filter screen 20, the second separation filter screen 21 and the third separation filter screen 22, which can realize step-by-step filtering and separation of the hydrogen fluoride tail gas flowing through the neutralizing tank 1, the absorption tank 2 and the adsorption tank 3, the absorption tank 2 is filled with the Pall ring filler 23 which is used in cooperation with the stirring frame 107 and the penetrating cylinder 114, the Pall ring filler 23 is separated by the two groups of second separation filter screens 21 which are distributed in an up-down manner in the absorption tank 2, the hydrogen fluoride tail gas is fully absorbed by the Pall ring filler 23, the penetrating cylinder 114 is distributed in a triangular staggered state along the central axis of the absorption tank 2, the comprehensive performance of the penetrating cylinder 114 in the reciprocating penetrating action in the absorption tank 2 is improved, the aerosol particles formed by the passing hydrogen fluoride tail gas are fully ionized and captured, the sliding hole 24 is arranged around the absorption tank 2, and the outer side of the penetrating cylinder 114 is fixedly connected with the sliding bar 25 which is in sliding cooperation with the sliding hole 24, the sliding bar 25 plays a role of sliding support for the penetrating cylinder 114 in the reciprocating penetrating action, and the reciprocating penetrating stability of the penetrating cylinder 114 is improved.

[0056] The adsorption assembly further comprises a long reciprocating screw rod 122 fixed on the top of the stirring frame 107, a screw rod sleeve 123 is threadedly connected to the long reciprocating screw rod 122, an annular framework 124 is fixedly connected to the outer side of the screw rod sleeve 123, a guide rail groove 125 in sliding cooperation with the guide rail strip 121 is arranged on the outer side of the annular framework 124, active carbon adsorption plates 126 in fixed cooperation with the screw rod sleeve 123 are fixedly connected to the upper and lower sides of the inner cavity of the annular framework 124, and modified alumina balls 127 are filled between the active carbon adsorption plates 126, the long reciprocating screw rod 122 is driven to rotate by the stirring frame 107, the annular framework 124 is in sliding and limiting cooperation with the guide rail strip 121 and the guide rail groove 125, then the long reciprocating screw rod 122 drives the annular framework 124 to perform reciprocating lifting motion in the adsorption tank 3 through the screw rod sleeve 123, the annular framework 124 drives the upper and lower distributed active carbon adsorption plates 126 to perform reciprocating pressure filtration adsorption on the hydrogen fluoride tail gas reaching the adsorption tank 3, and the modified alumina balls 127 between the active carbon adsorption plates 126 realize synchronous adsorption on the passing hydrogen fluoride tail gas, so as to complete double adsorption work of the hydrogen fluoride tail gas;

[0057] The upper and lower sides of the stirring frame 107 are fixedly connected with the first-level guide vanes 26 that cooperate with the absorption tank 2 for flow disturbance, and the hydrofluoric acid tail gas entering and discharged into the absorption tank 2 is subjected to flow disturbance treatment, which is beneficial for the hydrofluoric acid tail gas to enter and be discharged from the absorption tank 2, and the upper and lower sides of the long reciprocating screw 122 are fixedly connected with the second-level guide vanes 27 that cooperate with the adsorption tank 3 for flow disturbance, and the hydrofluoric acid tail gas entering and discharged into the adsorption tank 3 is subjected to flow disturbance treatment, which is beneficial for the hydrofluoric acid tail gas to enter and be discharged from the adsorption tank 2.

[0058] like Figures 19-21 As shown, in the process of treating hydrofluoric acid tail gas, the treated hydrofluoric acid tail gas cannot be purified and diluted, so that the hydrofluoric acid tail gas cannot be purified and the cleanliness of the hydrofluoric acid tail gas is reduced. A purification component used in conjunction with the negative pressure frame 6 is provided on the adsorption tank 3, and the purification component includes a negative pressure angle tube 131 with a one-way valve connected to the adsorption tank 3 and connected to the negative pressure frame 6. The top of the worm 111 is fixedly connected to a transfer rod 132, and the top of the transfer rod 132 is fixedly connected to a negative pressure fan 133 used in conjunction with the negative pressure frame 6. When the three long rotating rods 103 drive the upper and lower three worms 111 to rotate, the worm 111 also drives the negative pressure fans 133 on the three transfer rods 132 to rotate in the three groups of negative pressure frames 6 and generate negative pressure suction. The two sides of the negative pressure frame 6 The ends are connected to a negative pressure long tube 134, and the bottom end of the negative pressure long tube 134 is connected to an aeration pipe 135 with a one-way valve. Aeration holes 136 are opened on the circumference of the aeration pipe 135, and the outer cover of the aeration pipe 135 is provided with a purification box 137 for providing purification reaction for the hydrofluoric acid tail gas. The purification box 137 is connected to a discharge pipe with a one-way valve. Under the action of negative pressure suction, the hydrofluoric acid tail gas after neutralization, absorption, capture and adsorption in the adsorption tank 3 is sucked into the three negative pressure long tubes 134 through the three negative pressure angle tubes 131, and then aerated and diluted by the aeration holes 136 on the three aeration pipes 135 and the pure water in the three groups of purification boxes 137, thereby further reducing the concentration of the hydrofluoric acid tail gas while improving the cleanliness of the hydrofluoric acid tail gas, thereby completing the purification of the hydrofluoric acid tail gas.

[0059] The working principle of the hydrogen fluoride tail gas treatment device based on ecological protection is as follows: first, the hydrogen fluoride tail gas to be treated is injected into the neutralization tank 1 through the filling port, the double-head motor 81 is controlled to be started and drive the spiral frame 82 and the first main gear 85 to rotate synchronously, the first main gear 85 drives the short rotating rods 87 on the three first auxiliary gears 86 to rotate, the three short rotating rods 87 drive the pistons 93 on the three connecting rods 92 to reciprocate in the three groups of cylinder barrels 5 through the three groups of swing arms 91, according to the current treatment requirement of the hydrogen fluoride tail gas, the three-way valves 94 on the three groups of cylinder barrels 5 are controlled to be opened, and under the cooperation of the pistons 93 in the cylinder barrels 5, the sodium hydroxide solution, the sodium dodecyl sulfonate surfactant, or the yellow smoke removing agent containing sulfur compound in the neutralization liquid tank 15, the active agent tank 16 and the removing agent tank 17 are supplied into the pressurizing pipe 95 through the supply angle pipe 14 corresponding to the three-way valves 94 in the opened state, and then the sodium hydroxide solution, the sodium dodecyl sulfonate surfactant, or the yellow smoke removing agent containing sulfur compound is sprayed into the spiral frame 82 with the hollow structure through the rotating end 97 and the communication end 84 corresponding to the liquid distribution frame 96, and then the sodium hydroxide solution, the sodium dodecyl sulfonate surfactant, or the yellow smoke removing agent containing sulfur compound is sprayed into the hydrogen fluoride tail gas area in the neutralization tank 1 through the spray holes 83 on the rotating spiral frame 82, when the sodium hydroxide solution is sprayed, the hydrogen fluoride tail gas in the neutralization tank 1 is neutralized to generate sodium fluoride and water, when the sodium dodecyl sulfonate surfactant is sprayed, the gas-liquid mass transfer effect of the hydrogen fluoride tail gas in the neutralization tank 1 is enhanced, which is beneficial to the efficient neutralization of the hydrogen fluoride tail gas, and when the yellow smoke removing agent containing sulfur compound is sprayed, the yellow smoke generated during the neutralization reaction of the hydrogen fluoride tail gas is eliminated, NO2 is converted into N2, and the neutralization, activation and smoke elimination of the hydrogen fluoride tail gas in the neutralization tank 1 are completed.

[0060] The hydrofluoric acid tail gas after the neutralization, activation and smoke elimination work in the neutralization tank 1 is supplied to the absorption tank 2 in sections through the three feeding pipes 4. At the same time, the three short rotating rods 87 also drive the differential gears 102 on the three sets of planetary gears 101 to rotate successively, and the three sets of differential gears 102 drive the second sub-gears 104 on the three long rotating rods 103 to rotate accordingly. The three sets of second sub-gears 104 drive the three gear racks 105 to rotate synchronously, and the three gear racks 105 drive the stirring rack 107 on the second main gear 106 to rotate. The rotating stirring rack 107 stirs the ball ring packing 23 injected into the absorption tank 2 through the packing port, thereby expanding the contact between the ball ring packing 23 and the hydrofluoric acid tail gas in the stirring state. Absorption area, reducing the concentration of hydrofluoric acid tail gas, at the same time, the three long rotating rods 103 drive the upper and lower three worms 111 to rotate synchronously, the three worms 111 drive the short reciprocating screws 113 on the three groups of worm wheels 112 to rotate synchronously therewith, and the three short reciprocating screws 113 drive the three interlaced cylinders 114 to reciprocate in the absorption tank 2 in a triangular interlaced form through the reciprocating screw slots 115, and the three groups of high-voltage electric field generators 117 provide high-voltage electric field support to the three groups of conductive probes 116, then the three groups of conductive probes 116 carrying the high-voltage electric field ionize and capture the aerosol particles formed by the hydrofluoric acid tail gas in the absorption tank 2 in a triangular interlaced form, completing the absorption and capture of the hydrofluoric acid tail gas;

[0061] The hydrofluoric acid tail gas that has completed the absorption and capture work in the absorption tank 2 is supplied to the absorption tank 3 in a zoned manner through the three feeding pipes 4. At the same time, the stirring frame 107 drives the long reciprocating screw 122 to rotate synchronously. The guide rail 121 and the guide rail groove 125 play a sliding limit role on the annular skeleton 124. Then, the long reciprocating screw 122 drives the annular skeleton 124 on the screw sleeve 123 to perform a reciprocating lifting motion in the absorption tank 3. The reciprocating lifting motion of the annular skeleton 124 drives the upper and lower layers of activated carbon adsorption plates 126 to move accordingly, and adsorbs the hydrofluoric acid tail gas in the absorption tank 3 in the form of dynamic pressure filtration, and then the modified alumina balls 127 between the upper and lower layers of activated carbon adsorption plates 126 are used to remove the hydrofluoric acid tail gas. The hydrofluoric acid tail gas is subjected to enhanced adsorption to complete the double adsorption of the hydrofluoric acid tail gas. Finally, the three long rotating rods 103 drive the three upper and lower worm gears 111 to rotate. At the same time, the worm gear 111 also drives the negative pressure fans 133 on the three intermediate rotating rods 132 to rotate in the three groups of negative pressure frames 6 and generate negative pressure suction. Under the action of the negative pressure suction, the hydrofluoric acid tail gas after neutralization, absorption, capture and adsorption in the adsorption tank 3 is sucked into the three negative pressure long tubes 134 through the three negative pressure angle tubes 131, and then aerated and diluted by the aeration holes 136 on the three aeration pipes 135 and the pure water in the three groups of purification boxes 137. The hydrofluoric acid tail gas after purification and dilution is tested by the gas detector connected to the discharge pipe and then discharged ultra-cleanly.

[0062] It should be noted that the specific models and specifications of the double-headed motor 81, the conductive probe 116, the high-voltage electric field generator 117, and various valves and sensors need to be selected and determined based on the actual specifications of the device. The specific selection calculation method adopts the existing technology in this field, so it will not be repeated in detail.

[0063] The power supply circuits of the double-headed motor 81, the conductive probe 116, the high-voltage electric field generator 117, and various valves and sensors are clear to those skilled in the art and will not be described in detail here.

[0064] It will be understood that the present invention is described by way of some embodiments, and it will be appreciated by those skilled in the art that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. In addition, under the teachings of the present invention, these features and embodiments may be modified to adapt to specific circumstances and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are intended to be protected by the present invention.

Claims

1. A hydrofluoric acid tail gas treatment device based on ecological protection, comprising a neutralization tank (1), an absorption tank (2) and an adsorption tank (3), characterized in that: The neutralization tank (1), the absorption tank (2) and the adsorption tank (3) are connected via a feed pipe (4) with a one-way valve, and the bottom of the neutralization tank (1) is fixedly connected to a cylinder barrel (5) via a bracket, the outer side of the adsorption tank (3) is fixedly connected to a negative pressure frame (6), and the outer side of the absorption tank (2) is fixedly connected to a fixing frame (7); The neutralization tank (1) is provided with a swirl assembly, and the swirl assembly includes a double-headed motor (81) embedded in the bottom of the neutralization tank (1); the cylinder barrel (5) is provided with a supply assembly used in conjunction with the swirl assembly, and the supply assembly includes a three-way valve (94) connected to the cylinder barrel (5); the inner end of the three-way valve (94) is connected to a supply angle tube (14) with a one-way valve, and the top end of the supply angle tube (14) is respectively connected to a neutralization liquid tank (15), an active agent tank (16), and a removal agent tank (17) fixedly matched with the neutralization tank (1); An absorption assembly and a capture assembly are respectively provided in the absorption tank (2), and the absorption assembly includes a stirring frame (107) rotating in the absorption tank (2), and the stirring frame (107) is distributed in a triangular equidistant shape and has open slots, and the capture assembly includes an interlaced cylinder (114) sliding in the absorption tank (2) and the fixed frame (7), and the absorption tank (3) is provided with an absorption assembly, and the absorption assembly includes a guide bar (121) fixed in the absorption tank (3).

2. The hydrofluoric acid tail gas treatment device based on ecological protection according to claim 1, characterized in that: The swirl assembly further comprises a spiral frame (82) fixed on one output shaft of the double-headed motor (81) and adopts a hollow structure design, and the spiral frame (82) is spirally provided with spray holes (83) around its periphery, the top end of the spiral frame (82) is connected to a connecting end (84), and a first main gear (85) is fixedly connected to the other output shaft of the double-headed motor (81), the outer side of the first main gear (85) is meshed with a first sub-gear (86), and the outer side of the first sub-gear (86) is fixedly connected to a short rotating rod (87).

3. The hydrofluoric acid tail gas treatment device based on ecological protection according to claim 2, characterized in that: The supply assembly further comprises a swing arm (91) fixed on the outside of the short rotating rod (87), and a connecting rod (92) is hinged on the outside of the swing arm (91), a piston (93) which is slidably matched with the cylinder barrel (5) is hinged on the outside of the connecting rod (92), and the top end of the three-way valve (94) is connected to a pressurized pipe (95) which penetrates and matches the neutralization tank (1), the inner end of the pressurized pipe (95) is connected to a liquid distribution rack (96) which is fixedly matched with the neutralization tank (1), and the inner end of the liquid distribution rack (96) is connected to a rotating end (97) which is rotatably matched with the connecting end (84) and maintains a mutual communication state with each other.

4. The hydrofluoric acid tail gas treatment device based on ecological protection according to claim 3, characterized in that: The absorption assembly further comprises a planetary gear (101) fixed on the short rotating rod (87), and a differential gear (102) is meshed on the planetary gear (101), the top of the differential gear (102) is fixedly connected to the long rotating rod (103), and the top of the long rotating rod (103) is fixedly connected to the second sub-gear (104), the inner side of the second sub-gear (104) is meshed with a gear rack (105), and the inner side of the gear rack (105) is meshed with a second main gear (106) fixedly matched with the stirring rack (107).

5. The hydrofluoric acid tail gas treatment device based on ecological protection according to claim 4, characterized in that: The capture assembly further comprises two sections of worm gears (111) fixed on the top of the long rotating rod (103), and one side of the worm gear (111) is meshed with a worm wheel (112) that is rotatably matched with the fixed frame (7), the inner side of the worm wheel (112) is fixedly connected with a short reciprocating screw (113), and a reciprocating screw groove (115) that is threadably matched with the short reciprocating screw (113) is provided in the insertion cylinder (114), a conductive probe (116) is embedded in the inner side of the insertion cylinder (114), and a high-voltage electric field generator (117) used in conjunction with the conductive probe (116) is fixedly connected to the outer side of the fixed frame (7).

6. The hydrofluoric acid tail gas treatment device based on ecological protection according to claim 5, characterized in that: The adsorption assembly further comprises a long reciprocating screw (122) fixed on the top of the stirring frame (107), and a screw sleeve (123) is threadedly connected to the long reciprocating screw (122), an annular frame (124) is fixedly connected to the outer side of the screw sleeve (123), and a guide rail groove (125) is provided on the outer side of the annular frame (124) for slidingly matching with the guide rail (121), and activated carbon adsorption plates (126) fixedly matched with the screw sleeve (123) are fixedly connected to the upper and lower sides of the inner cavity of the annular frame (124), and modified alumina balls (127) are filled between the activated carbon adsorption plates (126).

7. The hydrofluoric acid tail gas treatment device based on ecological protection according to claim 6, characterized in that: The neutralizing liquid tank (15), the activating agent tank (16) and the removing agent tank (17) are respectively filled with sodium hydroxide solution, sodium dodecyl sulfate surfactant and yellow smoke remover containing sulfur compound, and the neutralizing liquid tank (15), the activating agent tank (16) and the removing agent tank (17) are all embedded with liquid level sensors (18).

8. The hydrofluoric acid tail gas treatment device based on ecological protection according to claim 7, characterized in that: A turbulent blade (19) is fixedly connected to one side of the long rotating rod (103) close to the neutralizing liquid tank (15), the active agent tank (16) and the removal agent tank (17), and a first-stage partition filter (20), a second-stage partition filter (21) and a third-stage partition filter (22) are embedded in the neutralizing tank (1), the absorption tank (2) and the adsorption tank (3), respectively.

9. The hydrofluoric acid tail gas treatment device based on ecological protection according to claim 8, characterized in that: The absorption tank (2) is filled with ball ring fillers (23) used in conjunction with the stirring frame (107) and the interpenetrating cylinder (114), and the ball ring fillers (23) are separated by two groups of secondary separation filters (21) distributed in an upper and lower manner in the absorption tank (2), and the interpenetrating cylinders (114) are distributed in a triangular staggered state along the central axis of the absorption tank (2).

10. The hydrofluoric acid tail gas treatment device based on ecological protection according to claim 9, characterized in that: The absorption tank (2) is provided with a sliding opening (24) on all four sides, and a sliding strip (25) that is slidably matched with the sliding opening (24) is fixedly connected to the outer side of the insertion cylinder (114); the upper and lower sides of the stirring frame (107) are fixedly connected with a primary guide vane (26) that is matched with the flow disturbance of the absorption tank (2); and the upper and lower sides of the long reciprocating screw (122) are fixedly connected with a secondary guide vane (27) that is matched with the flow disturbance of the adsorption tank (3).

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