A high-efficiency desulfurization device and desulfurization method for copper smelting flue gas

Abstract

The present invention provides a high-efficiency desulfurization equipment and desulfurization method for copper smelting flue gas, comprising a desulfurization tower, an exhaust fan provided inside the desulfurization tower, a furnace chamber provided on the top of the desulfurization tower, an alkali desulfurization chamber connected at one end of the top of the furnace chamber, an alkalization component provided at one end of the gas outlet of the alkali desulfurization chamber, a liquid outlet end of the alkalization component is spray-type, and the spraying direction is opposite to the gas diversion direction of the alkali desulfurization chamber; the alkalization component is connected to an impurity removal cooling chamber, the impurity removal cooling chamber is located on the outer peripheral side of the alkali desulfurization chamber, the impurity removal cooling chamber is provided with a coolant tank near one end of the furnace chamber, an oxidation box is provided on the top of the coolant tank, the gas flowing out of the coolant tank flows unidirectionally to the oxidation box, and a dust removal chamber is connected to the upper part of the oxidation box. The present invention guides the flue gas to change speed and temperature in a pipeline-type device to achieve two desulfurization effects, can achieve a one-time full impurity desulfurization effect, obtain a more optimized flue gas emission purification degree, and reduce environmental pollution.

Description

Technical Field

[0001] The present invention relates to the technical field of flue gas desulfurization treatment equipment, and in particular to a high-efficiency desulfurization equipment and a desulfurization method for copper smelting flue gas. Background Art

[0002] When treating flue gas, bag dust collectors are usually used to filter the flue gas. However, since bag dust collectors can only remove dust particles, they cannot effectively remove some harmful waste gases such as sulfides in the flue gas. In order to ensure that the flue gas emissions meet the standards, factories usually apply alkaline solution spraying devices to the pipes through which sulfur-containing flue gas passes to react chemically with sulfur to reduce the sulfur content of the flue gas. However, the direct spraying method of water droplets and mist of alkaline solution will leave a large amount of space gap between the flow method of flue gas, resulting in a large amount of sulfur-containing flue gas escaping. The use of extra-long pipes and a large amount of alkaline solution spraying will result in a large amount of solution cost waste, and there will still be a large amount of sulfur-containing flue gas escaping due to uneven spraying, which cannot achieve a complete flue gas emission purification and filtration effect, and has poor applicability.

[0003] To achieve the above objectives, the present invention provides a high-efficiency desulfurization device and a desulfurization method for copper smelting flue gas, which can solve the problems raised in the above background technology. Summary of the Invention

[0004] The present invention adopts the following technical solutions to achieve:

[0005] A high-efficiency desulfurization device for copper smelting flue gas comprises a desulfurization tower, an exhaust fan is provided inside the desulfurization tower, a furnace chamber is provided on the top of the desulfurization tower, one end of the top of the furnace chamber is connected to an alkali desulfurization chamber, an alkalization component is provided opposite to the gas outlet end of the alkali desulfurization chamber, and the liquid outlet end of the alkalization component is spray-type and the spray direction is opposite to the gas diversion direction of the alkali desulfurization chamber;

[0006] The alkalization component is connected to an impurity removal cooling cabin, which is located on the outer peripheral side of the alkali desulfurization cabin. The impurity removal cooling cabin is provided with a coolant tank near one end of the furnace cabin, and the top of the coolant tank is connected to an oxidation box. The gas flowing out of the coolant tank flows unidirectionally to the oxidation box, and the upper part of the oxidation box is connected to a dust removal cabin;

[0007] The alkaline desulfurization chamber includes a plurality of desulfurization pipes, and the air inlet ends of the plurality of desulfurization pipes are connected to the furnace chamber;

[0008] The alkalization component is fixed inside the dust removal cabin, and the alkalization component includes an alkaline water tank. The outside of the alkaline water tank is connected to a circulating clean water tank through a pump body. A plurality of spray devices are provided at the bottom of the alkaline water tank. The plurality of spray devices correspond one to one with the central axis of the desulfurization pipe. The gas flow direction inside the desulfurization pipe is opposite to the spray direction of the spray device.

[0009] The desulfurization tube includes an inner tube and an outer tube with one end connected to each other, one end of the inner tube is fixed to the furnace chamber, and the other end is connected to the inside of the outer tube, and one end of the outer tube is fixed to the impurity removal cooling chamber;

[0010] The sleeve gap between the inner tube and the outer tube is connected to the bottom end of the impurity removal cooling chamber and is used to guide the alkali solution hanging on the wall;

[0011] A ventilation cover is provided on the outside of the alkalization component;

[0012] The impurity removal cooling chamber includes a cooling pipe and a coolant tank. The cooling pipe includes two side ring frames. The side ring frames are sleeved and fixed to the outside of the alkali desulfurization chamber. The side ring frame on one side is sealed and fixed to the edge of the ventilation hood. The side ring frame on the other side is fixed to the coolant tank. A plurality of secondary acceleration tubes are provided on the two side ring frames. The two ends of the secondary acceleration tubes are connected to the ventilation hood and the top of the coolant tank.

[0013] The total air inlet area of ​​the plurality of secondary accelerating tubes is smaller than the air inlet area of ​​the ventilation cover.

[0014] Preferably, the furnace body cabin is a truncated cone-shaped cabin, the bottom end of the truncated cone of the furnace body cabin is connected to the exhaust fan, the top end of the truncated cone of the furnace body cabin is connected to the alkali desulfurization cabin, and the cross-sectional area of ​​the air inlet end of the alkali desulfurization cabin is smaller than the air inlet area of ​​the bottom end of the truncated cone of the furnace body cabin.

[0015] Preferably, the alkaline desulfurization chamber includes a plurality of desulfurization pipes, and the air inlet ends of the plurality of desulfurization pipes are connected to the furnace chamber;

[0016] The alkalization component is fixed inside the dust removal chamber, and the alkalization component includes an alkaline water tank. The outside of the alkaline water tank is connected to a circulating clean water tank through a pump body. Multiple spray devices are provided at the bottom of the alkaline water tank. The multiple spray devices correspond one-to-one to the central axis of the desulfurization pipe. The gas flow direction inside the desulfurization pipe is opposite to the spraying direction of the spray device.

[0017] Preferably, the desulfurization tube includes an inner tube and an outer tube with one end portion sleeved together, one end of the inner tube is fixed to the furnace chamber, and the other end is sleeved inside the outer tube, and one end of the outer tube is fixed to the impurity removal cooling chamber;

[0018] The sleeve gap between the inner tube and the outer tube is connected to the bottom end of the impurity removal cooling chamber and is used for guiding the alkali solution hanging on the wall.

[0019] Preferably, a ventilation cover is provided on the outside of the alkalization component;

[0020] The impurity removal cooling chamber includes a cooling pipe and a coolant tank. The cooling pipe includes two side ring frames. The side ring frames are sleeved and fixed to the outside of the alkali desulfurization chamber. The side ring frame on one side is sealed and fixed to the edge of the ventilation hood. The side ring frame on the other side is fixed to the coolant tank. A plurality of secondary acceleration tubes are provided on the two side ring frames. The two ends of the secondary acceleration tubes are connected to the ventilation hood and the top of the coolant tank.

[0021] The total air inlet area of ​​the plurality of secondary accelerating tubes is smaller than the air inlet area of ​​the ventilation cover.

[0022] Preferably, the coolant tank is sleeved and fixed on the outside of the alkali desulfurization chamber, and the interior of the dust removal chamber is provided with an air suction groove, and the interior of the air suction groove is provided with an air exchanger;

[0023] The inner space of the cooling pipe and the inner space of the secondary accelerating tube are sealed with each other, the air suction groove is communicated with the inner space of the cooling pipe, and the air suction groove is communicated with the outside of the desulfurization equipment.

[0024] Preferably, the oxidation desulfurization chamber includes an air pump and an oxidation box, the oxidation box is fixed on the outside of the cooling pipe, the air inlet end of the air pump is connected to the top of the coolant tank, the air pump and one end of the gas inlet of the oxidation box are connected with a one-way airflow valve, and the interior of the oxidation box is filled with hydrogen peroxide.

[0025] Preferably, the dust removal chamber includes a drying box fixed to the top of the oxidation desulfurization chamber, and a filter layer is provided inside the drying box.

[0026] Preferably, the top end of the dust removal chamber is connected to a main drive fan.

[0027] A high-efficiency desulfurization method for copper smelting flue gas comprises the following steps: S1, injecting desulfurization raw materials: turning on the desulfurization equipment liquid supply pump at the top of the desulfurization tower, detecting the connected circulation status of the coolant in the impurity removal cooling chamber and the oxidizing liquid in the oxidation desulfurization chamber, and determining the normalized constant liquid level height;

[0028] S2. Equipment dust removal: Use the dust collector to remove dust inside the tower;

[0029] S3, desulfurization: Turn on the liquid supply pump connected to the feed end of the alkalization component to spray the alkaline water raw material with a mist shape and a pH between 6.8 and 8.5 into the alkali desulfurization chamber, and simultaneously turn on the exhaust fan inside the desulfurization furnace body to introduce the flue gas into the alkali desulfurization chamber;

[0030] S4, impurity removal: connect the external circulating water pump of the impurity removal cooling chamber, alternately circulate the oxidized water and the clean water, and simultaneously start the main driving fan;

[0031] S5. Flue gas detection: Perform flue gas sulfidation detection on the top of the desulfurization tower, and simultaneously perform flue gas sulfidation detection on the external cooling connection port on the side of the desulfurization tower.

[0032] Compared with the prior art, the present invention has the following beneficial effects:

[0033] The present invention guides the flue gas to change speed, temperature and adhesion through pipeline equipment to achieve desulfurization, impurity removal and two-time filtration effects, which can achieve a one-time full impurity desulfurization effect, obtain a more optimized flue gas emission effect, and reduce environmental pollution; first, the sulfur-containing flue gas is desulfurized and neutralized by alkaline desulfurization. The device uses a corresponding multi-port reverse spraying method, and collects the alkaline solution after spraying for secondary blending and utilization, which can save costs and also facilitate the increase of the spraying effect. The spraying device corresponds to the desulfurization pipe one by one, which can better form a more complete alkaline solution atomization area at the outlet end of the desulfurization pipe and the entire interior of the ventilation hood, which can enhance the effect of hedge spray desulfurization. At the same time, it can better control the temperature of the flue gas, that is, when the flue gas passes through the ventilation hood, it takes away part of the attached alkaline solution mist and enters the secondary acceleration tube. The low-temperature zone formed in the secondary acceleration tube section can facilitate the rapid condensation of the alkaline solution mist and take away the sulfur content in the flue gas. The secondary acceleration tube will also drive the flue gas and the coolant in the coolant tank to achieve a straight line collision. After cooling the flue gas, it can also prevent the flue gas from excessively reacting with the solution inside the oxidation desulfurization chamber due to high temperature and causing excessive pressure. While meeting the secondary desulfurization requirements at the same time, the overpressure hidden danger of the secondary desulfurization is eliminated through efficient desulfurization and cooling, and all-round filtration of sulfur-containing flue gas is achieved through two desulfurization methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 This is a schematic diagram of the top structure connection of the desulfurization tower of the present invention;

[0035] Figure 2 It is a schematic diagram of the connection between the external structure of the present invention and the internal structure of the coolant tank;

[0036] Figure 3 Schematic diagram of the internal structure and end connection of the cooling pipe of the present invention;

[0037] Figure 4 It is a schematic diagram of the connection between the internal structure of the alkali desulfurization chamber and the alkalization component structure of the present invention.

[0038] In the figure: 1. Alkali desulfurization chamber; 2. Impurity removal and cooling chamber; 3. Oxidation desulfurization chamber; 4. Dust removal chamber; 5. Main drive fan; 6. Furnace chamber;

[0039] 101. Desulfurization pipe; 102. Inner pipe; 104. Alkalinization component; 105. Spraying device;

[0040] 106. Ventilation hood;

[0041] 201, cooling pipe; 202, side ring frame; 203, secondary accelerating tube; 204, coolant tank; 205, air suction slot; 206, air exchanger;

[0042] 301, air pump; 302, one-way air flow valve; 303, oxidation box; 402, filter layer. DETAILED DESCRIPTION

[0043] To facilitate understanding of the present invention, the present invention will be described more comprehensively below with reference to the relevant drawings. Several embodiments of the present invention are given in the drawings. However, the present invention can be implemented in different forms and is not limited to the embodiments described in the text. On the contrary, these embodiments are provided to make the content disclosed in the present invention more thorough and comprehensive.

[0044] It should be noted that when an element is referred to as being "fixed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used in this article are for illustrative purposes only.

[0045] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly used by those skilled in the art to which the present invention pertains. The terms used in the specification of the present invention are for the purpose of describing specific embodiments only and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0046] The present invention will be further described in detail below with reference to the accompanying drawings.

[0047] In one embodiment of the present invention: Please refer to the attached Figure 1-3 A high-efficiency desulfurization device for copper smelting flue gas includes a desulfurization tower, an exhaust fan is provided inside the desulfurization tower, a furnace cabin 6 is provided on the top of the desulfurization tower, one end of the top of the furnace cabin 6 is connected to an alkali desulfurization cabin 1, an alkalization component 104 is provided opposite to the gas outlet end of the alkali desulfurization cabin 1, and the liquid outlet end of the alkalization component 104 is a spray type and the spray direction is opposite to the gas diversion direction of the alkali desulfurization cabin 1;

[0048] The alkalization component 104 is connected to an impurity removal cooling cabin 2, and the impurity removal cooling cabin 2 is located on the outer peripheral side of the alkali desulfurization cabin 1. The impurity removal cooling cabin 2 is provided with a coolant tank 204 near one end of the furnace cabin 6, and the top of the coolant tank 204 is connected to an oxidation box 303, and the gas flowing out of the coolant tank 204 flows in a unidirectional manner to the oxidation box 303, and the upper part of the oxidation box 303 is connected to a dust removal cabin 4; the present invention guides the flue gas to change speed, temperature and adhesion through pipeline equipment to achieve desulfurization, impurity removal, and two-time filtration effects, which can achieve a one-time full impurity desulfurization effect, obtain a more optimized flue gas emission effect, and reduce environmental pollution; first, the sulfur-containing flue gas is subjected to alkaline desulfurization neutralization, and the device uses a corresponding multi-port reverse spraying method, and collects the alkaline solution after spraying for secondary blending and utilization, which can save costs and also facilitate the increase of the spraying effect. The spraying device 105 and the desulfurization The sulfur tubes 101 correspond one to one, and can better form a more complete alkaline solution atomization zone at the outlet end of the desulfurization tube 101 and the entire interior of the ventilation hood 106, which can improve the effect of the hedge spray desulfurization. At the same time, it can better control the temperature of the flue gas, that is, when the flue gas passes through the ventilation hood 106, it takes away part of the attached alkaline solution mist and enters the interior of the secondary acceleration tube 203. The low-temperature zone formed in the pipe section of the secondary acceleration tube 203 can facilitate the rapid condensation of the alkaline solution mist and take away the sulfur content in the flue gas. In addition, the secondary acceleration tube 203 will also drive the flue gas and the coolant in the coolant tank 204 to achieve a straight line hedge. After cooling the flue gas, it can also prevent the flue gas from excessively reacting with the solution inside the oxidation desulfurization chamber 3 due to high temperature, resulting in excessive pressure. While meeting the secondary desulfurization requirements at the same time, the overpressure hidden danger of the secondary desulfurization is eliminated by efficient desulfurization and cooling, and all-round filtration of sulfur-containing flue gas is achieved through two desulfurization methods.

[0049] In another embodiment of the present invention: Please refer to Figure 2-4 The furnace cabin 6 is a truncated cone-shaped cabin, the bottom end of the truncated cone of the furnace cabin 6 is connected to the exhaust fan, the top end of the truncated cone of the furnace cabin 6 is connected to the alkali desulfurization cabin 1, and the cross-sectional area of ​​the air inlet end of the alkali desulfurization cabin 1 is smaller than the air inlet area of ​​the bottom end of the truncated cone of the furnace cabin 6;

[0050] The alkaline desulfurization chamber 1 includes a plurality of desulfurization pipes 101, and the air inlet ends of the plurality of desulfurization pipes 101 are connected to the furnace chamber 6;

[0051] The alkalization component 104 is fixed inside the dust removal cabin 4. The alkalization component 104 includes an alkaline water tank. The outside of the alkaline water tank is connected to a circulating clean water tank through a pump body. A plurality of spray devices 105 are provided at the bottom of the alkaline water tank. The plurality of spray devices 105 correspond one-to-one to the central axis of the desulfurization pipe 101. The gas flow direction inside the desulfurization pipe 101 is opposite to the spraying direction of the spray device 105. The flue gas counteraction method can reduce and concentrate the mixing area of ​​the flue gas and the alkaline solution, improve a more complete and dense atomization area, and enhance the reaction and retention effect of the sulfur-containing flue gas and the alkaline solution;

[0052] The desulfurization pipe 101 includes an inner pipe 102 and an outer pipe with one end connected to each other. One end of the inner pipe 102 is fixed to the furnace chamber 6, and the other end is connected to the inside of the outer pipe. One end of the outer pipe is fixed to the impurity removal cooling chamber 2. The gap between the inner pipe 102 and the outer pipe is connected to the bottom end of the impurity removal cooling chamber 2 to guide the alkali solution hanging on the wall.

[0053] This method can facilitate the circulation and replenishment of the alkaline solution at the source of the alkalization component 104 and the mixed solution collected at the coolant tank 204, and can facilitate the secondary utilization of the alkaline solution raw materials, thereby increasing the spraying amount at the spraying device 105. The spraying space that the spraying device 105 needs to be responsible for is smaller, and there will be no problems such as uneven spraying and incomplete coverage of the fog zone blockade.

[0054] In another embodiment of the present invention: Please refer to Figure 2 、 Figure 3 , a ventilation cover 106 is provided on the outside of the alkalization component 104;

[0055] The impurity removal cooling chamber 2 includes a cooling pipe 201 and a coolant tank 204. The cooling pipe 201 includes two side ring frames 202. The side ring frames 202 are sleeved and fixed to the outside of the alkali desulfurization chamber 1. The side ring frame 202 on one side is sealed and fixed to the edge of the ventilation cover 106. The side ring frame 202 on the other side is fixed to the coolant tank 204. A plurality of secondary acceleration tubes 203 are provided on the two side ring frames 202. The two ends of the secondary acceleration tubes 203 are connected to the ventilation cover 106 and the top of the coolant tank 204.

[0056] The total air inlet area of ​​the multiple secondary accelerating tubes 203 is smaller than the air inlet area of ​​the ventilation cover 106;

[0057] The coolant tank 204 is sleeved and fixed on the outside of the alkali desulfurization chamber 1, and the dust removal chamber 4 is provided with an air suction groove 205 inside, and a fan 206 is provided inside the air suction groove 205;

[0058] The inner space of the cooling pipe 201 and the inner space of the secondary accelerating tube 203 are sealed with each other, the air suction groove 205 is connected with the inner space of the cooling pipe 201, and the air suction groove 205 is connected with the outside of the desulfurization equipment;

[0059] This device utilizes the Bernoulli principle to block and concentrate airflow, accelerating the impact between sulfur-containing flue gas and the water mist sprayed by the alkalization assembly 104. This also facilitates the formation of a cavity-type mixed water mist within the ventilation hood 106, increasing the intensity of the primary desulfurization reaction and the frequency of the reaction between the alkaline solution and sulfate ions. As the airflow passes through the secondary acceleration tube 203, its velocity is further accelerated according to the Bernoulli principle, strengthening the narrow tube effect and enhancing the cooling effect. This also facilitates the impact and adhesion of the flue gas with the liquid surface of the coolant tank 204 after passing through the secondary acceleration tube 203, providing pressure for exhausting the flue gas within the coolant tank 204. Furthermore, the ventilation fan 206 can more quickly reduce the initial temperature of the narrow tube, i.e., the secondary acceleration tube 203, allowing it to maintain a relatively low temperature, facilitating the condensation of water vapor and the retention of sulfur-containing flue gas.

[0060] Please pay attention to Figure 2 The oxidation desulfurization chamber 3 includes an air pump 301 and an oxidation box 303. The oxidation box 303 is sleeved and fixed on the outside of the cooling pipe 201. The air inlet end of the air pump 301 is connected to the top of the coolant tank 204. The air pump 301 and one end of the gas inlet of the oxidation box 303 are connected with a one-way airflow valve 302. The inside of the oxidation box 303 is filled with hydrogen peroxide. The air pump 301 discharges the flue gas in the coolant tank 204 into the oxidation box 303 for secondary desulfurization. The exhaust method is intermittent exhaust. The one-way airflow valve 302 is used to turn on and off a single impact airflow. This method can produce a tumbling and stirring effect on the inside of the oxidation box 303, which is convenient for obtaining a better desulfurization reaction effect.

[0061] Please pay attention to Figure 1 The dust removal chamber 4 includes a drying box fixed to the top of the oxidation desulfurization chamber 3, and a filter layer 402 is provided inside the drying box. The top of the dust removal chamber 4 is connected to a main drive fan 5; the flue gas is treated by the bag dust collector and discharged into the desulfurization tower through the fan, first entering the main tower body through the desulfurization pipe 101, and the flue gas can be evenly distributed and risen in the tower through the flow equalizing plate at the bottom of the tower body. After being reversely mixed with the mist generated by the spray high-pressure nozzle of the alkalization component 104 over a large area, the sulfide and other harmful waste gases in the flue gas are mixed with the spray water mist (alkaline substances such as NaOH are added to the circulating alkali solution), and most of them are discharged from the tower body through the coolant tank 204 at the bottom of the tower body and enter the circulating water pool for precipitation and filtration. The purified gas carries part of the water mist and rises. After setting a Z-shaped water blocking plate or using a drying box to block water, it is discharged from the main drive fan 5 position of the exhaust port.

[0062] In another embodiment of the present invention: the device uses a high-efficiency desulfurization method for copper smelting flue gas, comprising the following steps: S1, injecting desulfurization raw materials: turning on the desulfurization equipment liquid supply pump at the top of the desulfurization tower, detecting the connected circulation status of the coolant inside the impurity removal cooling chamber 2 and the oxidizing liquid inside the oxidation desulfurization chamber 3, and determining the normalized constant liquid level height; performing a spot inspection before operating the equipment to ensure that the coolant tank 204 meets the water level standard: the minimum water level shall not be lower than the water intake port, and the maximum water level shall not be higher than the water outlet port; testing the circulation effect of the circulating water; and the page height of the coolant tank 204 shall not be greater than the bottom outlet height of the secondary acceleration end;

[0063] S2. Equipment dust removal: Use the dust collector to remove dust from the inside of the tower body. First, start the liquid supply pump of the alkalization component 104. The liquid supply pump is equipped with a frequency converter. By adjusting the frequency appropriately, the water volume can be controlled. When liquid flows out of the outlet of the desulfurization tower coolant tank 204, start the dust collector fan. After the dust collector fan motor operates normally, when the fan runs at the set minimum frequency, the alkalization component 104 flushing water pump is automatically started. The running time can be set from 1 to 60 minutes.

[0064] S3, desulfurization: open the liquid supply pump connected to the feed end of the alkalization component 104, spray the alkaline water raw material with a mist and a pH between 6.8 and 8.5 into the alkali desulfurization chamber 1, and simultaneously open the exhaust fan inside the desulfurization furnace body to introduce the flue gas into the alkali desulfurization chamber 1. The feed end of the alkaline solution and the stirring pump are set to stir the alkaline aqueous solution in real time, and the pH of the circulating liquid in the clear water tank is controlled to be 6.8-8.5. When the pH is less than 6.8, open the valve of the sodium alkali dosing pump to add alkali to the inside of the alkalization component 104 to increase the pH value of the circulating water. When the pH is greater than 8.5, close the valve of the sodium alkali dosing pump; connect to the regeneration tank, and the pH of the filler reaction mixture is between 6.8 and 8; when the pH is less than 6.8, automatically open the lime dosing pump to add lime slurry to the regeneration tank to increase the pH value. When the pH is 8.5, close the lime dosing pump;

[0065] S4, impurity removal: connect the external circulating water pump of the impurity removal cooling chamber 2, alternately circulate the oxidized water and the clean water, and simultaneously start the main drive fan 5; during the impurity removal process, the sulfur-containing flue gas passes through the outer tube of the desulfurization tube 101 to the atomization area formed by the alkalization component 104, mixes to form water droplets on the wall, and flows into the coolant tank 204 from the gap between the inner tube 102 and the outer tube. In addition, the secondary acceleration tube 203 is used to accelerate the flue gas twice, so that the flue gas and impurities adhere to the solution inside the coolant tank 204 to form a counter-liquid surface, thereby removing the remaining impurities;

[0066] S5. Flue gas detection: Flue gas sulfidation detection is carried out on the top of the desulfurization tower, and flue gas sulfidation detection is carried out on the external cooling connection port on the side of the desulfurization tower at the same time. Flue gas detection is carried out in two ways, one is the end sulfidation flue gas content detection, and the other is the external exhaust sealing leakage flue gas detection. Monitoring is carried out at the suction groove 205. The suction groove 205 is connected to the internal pipeline, and suction will definitely be generated at the suction groove 205, so that untreated flue gas will be discharged. The flue gas flow intervals connected to the suction groove 205 are the upper space of the coolant tank 204 and the internal space of the cooling pipe 201, respectively, which is convenient for leakage self-inspection at these two points.

[0067] The spray tower is constructed from 12mm thick steel plate. To prevent acid corrosion, the interior of the tower should be coated with a glass flake coating; alternatively, fiberglass or 316L stainless steel should be used. The tower's spray assembly is constructed from 316L stainless steel or fiberglass, the nozzles from silicon carbide, the demisting system from PP, the circulating water pump from a wear-resistant and corrosion-resistant horizontal pump, and the alkalization component's 104 water pump from a clean water pump.

[0068] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0069] The above content is merely an example and explanation of the structure of the present invention. Those skilled in the art may make various modifications or additions to the described specific embodiments or replace them in a similar manner. As long as they do not deviate from the structure of the invention or exceed the scope defined by the claims, they should all fall within the scope of protection of the present invention.

Claims

1. A high-efficiency desulfurization device for copper smelting flue gas, characterized by: The invention comprises a desulfurization tower, wherein an exhaust fan is provided inside the desulfurization tower, a furnace cabin (6) is provided on the top of the desulfurization tower, one end of the top of the furnace cabin (6) is connected to an alkali desulfurization cabin (1), an alkalization component (104) is provided at the gas outlet end of the alkali desulfurization cabin (1), and the liquid outlet end of the alkalization component (104) is spray-type and the spraying direction is opposite to the gas guide direction of the alkali desulfurization cabin (1); The alkalization component (104) is connected to an impurity removal cooling chamber (2), the impurity removal cooling chamber (2) is located on the outer peripheral side of the alkali desulfurization chamber (1), the impurity removal cooling chamber (2) is provided with a coolant tank (204) at one end close to the furnace chamber (6), the top of the coolant tank (204) is connected to an oxidation chamber (303), the gas flowing out of the coolant tank (204) flows in a unidirectional manner to the oxidation chamber (303), and the upper part of the oxidation chamber (303) is connected to a dust removal chamber (4); The alkaline desulfurization chamber (1) comprises a plurality of desulfurization pipes (101), and the air inlet ends of the plurality of desulfurization pipes (101) are connected to the furnace chamber (6); The alkalization component (104) is fixed inside the dust removal chamber (4), and the alkalization component (104) includes an alkaline water tank. The outside of the alkaline water tank is connected to a circulating clean water tank through a pump body. A plurality of spray devices (105) are provided at the bottom of the alkaline water tank. The plurality of spray devices (105) correspond to the central axis of the desulfurization pipe (101) one by one. The gas flow direction inside the desulfurization pipe (101) is opposite to the spray direction of the spray device (105); The desulfurization pipe (101) includes an inner pipe (102) and an outer pipe, the ends of which are sleeved together. One end of the inner pipe (102) is fixed to the furnace chamber (6), and the other end is sleeved inside the outer pipe. One end of the outer pipe is fixed to the impurity removal cooling chamber (2). The sleeve gap between the inner tube (102) and the outer tube is connected to the bottom end of the impurity removal cooling chamber (2) and is used to guide the alkali solution hanging on the wall; A ventilation cover (106) is provided outside the alkalization component (104); The impurity removal cooling chamber (2) includes a cooling pipe (201) and a cooling liquid tank (204), the cooling pipe (201) includes two side ring frames (202), the side ring frames (202) are sleeved and fixed to the outside of the alkali desulfurization chamber (1), the side ring frame (202) on one side is sealed and fixed to the edge of the ventilation cover (106), and the side ring frame (202) on the other side is fixed to the cooling liquid tank (204), and a plurality of secondary accelerating tubes (203) are provided on the two side ring frames (202), and the two ends of the secondary accelerating tubes (203) are connected to the ventilation cover (106) and the top of the cooling liquid tank (204); The total air inlet area of ​​the plurality of secondary accelerating tubes (203) is smaller than the air inlet area of ​​the ventilation cover (106).

2. The high-efficiency desulfurization equipment for copper smelting flue gas according to claim 1, characterized in that: The furnace body cabin (6) is a truncated cone-shaped cabin, the bottom end of the truncated cone of the furnace body cabin (6) is connected to the exhaust fan, the top end of the truncated cone of the furnace body cabin (6) is connected to the alkali desulfurization cabin (1), and the cross-sectional area of ​​the air inlet end of the alkali desulfurization cabin (1) is smaller than the air inlet area of ​​the bottom end of the truncated cone of the furnace body cabin (6).

3. The high-efficiency desulfurization equipment for copper smelting flue gas according to claim 1, characterized in that: The cooling liquid tank (204) is sleeved and fixed on the outside of the alkali desulfurization chamber (1); an air suction groove (205) is provided inside the dust removal chamber (4); and an air exchanger (206) is provided inside the air suction groove (205); The inner space of the cooling pipe (201) and the inner space of the secondary accelerating pipe (203) are sealed with each other, the air suction groove (205) is connected with the inner space of the cooling pipe (201), and the air suction groove (205) is connected with the outside of the desulfurization equipment.

4. The high-efficiency desulfurization equipment for copper smelting flue gas according to claim 1, characterized in that: The oxidation desulfurization chamber (3) includes an air pump (301) and an oxidation box (303). The oxidation box (303) is sleeved and fixed on the outside of the cooling pipe (201). The air inlet end of the air pump (301) is connected to the top of the coolant tank (204). A one-way air flow valve (302) is connected between the air pump (301) and one end of the gas inlet of the oxidation box (303). The interior of the oxidation box (303) is filled with hydrogen peroxide.

5. The high-efficiency desulfurization equipment for copper smelting flue gas according to claim 4, characterized in that: The dust removal chamber (4) comprises a drying box body fixed to the top of the oxidation desulfurization chamber (3), and a filter layer (402) is provided inside the drying box body.

6. The high-efficiency desulfurization equipment for copper smelting flue gas according to claim 1, characterized in that: The top end of the dust removal chamber (4) is connected to a main driving fan (5).

7. A method for efficiently desulfurizing copper smelting flue gas, according to the efficient desulfurization equipment for copper smelting flue gas according to any one of claims 1 to 6, characterized in that: The method comprises the following steps: S1, injecting desulfurization raw materials: turning on the desulfurization equipment liquid supply pump at the top of the desulfurization tower, detecting the connected circulation state of the coolant inside the impurity removal cooling chamber (2) and the oxidizing liquid inside the oxidizing desulfurization chamber (3), and determining the normalized constant liquid level height; S2. Equipment dust removal: Use the dust collector to remove dust from the inside of the tower; S3, desulfurization: start the liquid supply pump connected to the feed end of the alkalization component (104), spray the alkaline water raw material with a pH between 6.8 and 8.5 into the alkali desulfurization chamber (1), and simultaneously start the exhaust fan inside the desulfurization furnace body to introduce the flue gas into the alkali desulfurization chamber (1); S4, impurity removal: connecting the external circulating water pump of the impurity removal cooling chamber (2), alternately circulating the oxidized water and the clean water, and simultaneously starting the main driving fan (5); S5. Flue gas detection: Perform flue gas sulfidation detection on the top of the desulfurization tower, and simultaneously perform flue gas sulfidation detection on the external cooling connection port on the side of the desulfurization tower.

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