Sulfur tail gas recycling device

Abstract

The utility model relates to a sulfur tail gas recycling device which comprises a tail gas incinerator, an exhaust chimney, an incinerator lower conveying pipe, a waste heat boiler and a boiler conveying pipe, and the exhaust chimney further comprises a dust remover, a reaction body, a containing body, a neutralization input pipe, a neutralization output pipe, a cleaning assembly and a reaction assembly. Cleaning assemblies are arranged in the reaction body and on the left side and the right side of the reaction body, the inner wall of the reaction body is cleaned through driving of a motor, the situation that substances are accumulated in the reaction body and are difficult to enter a neutralizing tank at the lower end is avoided, meanwhile, the neutralizing tank is arranged, a rubber pad is arranged for sealing the neutralizing tank, and the neutralizing tank is arranged in a movable plate; the neutralizing tank is convenient to replace; therefore, the inner wall of the reaction body is cleaned more thoroughly, corrosive substances are pushed into the neutralizing tank for neutralization reaction, the corrosivity to the whole equipment is effectively reduced, the use amount of caustic soda is reduced, and the production process is simplified.

Description

Technical Field

[0001] The utility model relates to tail gas emission treatment equipment, in particular to a sulfur tail gas recovery and reuse device. Background Art

[0002] There are several methods for treating and recovering sulfur tail gas: direct incineration, using polyethylene glycol as solvent and sodium benzoate-type organic carbonyl as catalyst to subject tail gas to liquid-phase Claus reaction, and alkali absorption.

[0003] The alkali absorption method is to burn the tail gas in a combustion furnace to convert hydrogen and sulfur in the tail gas into sulfur dioxide, and then after cooling and water washing, it enters the absorption tower and reacts with liquid alkali in reverse to generate sodium bisulfite. Generally, when the pH value of the circulating liquid alkali reaches 6-6.5, it is input into the neutralization tank for neutralization to generate sodium bisulfite, and the sodium bisulfite crystals are separated by centrifugation and become the product after drying. This method has low investment, simple process and good purification effect.

[0004] However, when the alkali absorption method is used, the sodium bisulfite crystals generated by the liquid alkali reaction are easily adhered to the inner wall of the device and are difficult to clean. In addition, sodium hydroxide is highly alkaline and corrosive, which can easily cause corrosion to the equipment. At the same time, the consumption of caustic soda is large and the process is complicated. Utility Model Content

[0005] In view of this, the main purpose of the utility model is to provide a sulfur tail gas recovery and reuse device. Through the technical solution, cleaning components are arranged inside the reactor and on the left and right sides, and the inner wall of the reactor is cleaned by a motor drive to avoid the accumulation of substances inside the reactor and making it difficult for them to enter the neutralization tank at the lower end. At the same time, a neutralization tank is arranged to make the inner wall of the reactor cleaned more thoroughly, and the corrosive substances are pushed into the neutralization tank for neutralization reaction, which effectively reduces the corrosiveness to the overall equipment, reduces the amount of caustic soda used, and simplifies the production process.

[0006] In order to achieve the above-mentioned purpose, the technical scheme of the utility model is implemented as follows: a sulfur tail gas recovery and reuse device, including a tail gas incinerator, an exhaust chimney, an incinerator lower delivery pipe, a waste heat boiler and a boiler delivery pipe, the exhaust chimney is arranged on the top of the tail gas incinerator, the upper end of the incinerator lower delivery pipe is connected to the bottom of the tail gas incinerator, the lower end of the incinerator lower delivery pipe is connected to the waste heat boiler, and one end of the boiler delivery pipe is connected to the side wall of the waste heat boiler; it also includes a dust collector, a reaction body, a container, a neutralization input pipe, a neutralization output pipe, a cleaning component and a reaction component, the reaction body and the boiler The other end of the furnace conveying pipe is connected, the dust collector is connected in series on the boiler conveying pipe, the container is arranged on the upper end of the reaction body, and a plurality of through holes are evenly arranged on the bottom of the container, the cleaning component is arranged inside and on the left and right sides of the reaction body, the reaction component is arranged below the reaction body, and the reaction component is connected to the reaction body through the neutralization input pipe. When used, liquid alkali is contained in the container; the cleaning component can clean the inner wall of the reaction body, and the reaction component can neutralize the corrosive substances, and the neutralized corrosive substances are sent out through the neutralization output pipe.

[0007] As a further technical solution, the cleaning assembly includes a shovel block, a movable hole and a movable frame. The two movable holes are respectively arranged at the lower parts of both sides of the reaction body, and the two groups of shovel blocks are respectively arranged on both sides of the bottom of the reaction body. The inner ends of the two movable frames respectively pass horizontally through the corresponding movable holes and are fixedly connected to the outer sides of the corresponding shovel blocks.

[0008] As a further technical solution, the cleaning assembly also includes a support frame, a rack, a gear and a motor. The support frame is arranged on the outer end of the movable frame, the rack is arranged horizontally, and the inner end of the rack is fixed on the corresponding side wall of the reaction body. The motor is fixed on the support frame, and the gear is fixed on the rotating shaft of the motor. The gear is arranged below the rack, and the gear is meshed with the rack.

[0009] As a further technical solution, the reaction assembly includes a fixed seat, a movable plate, a neutralization tank and a mounting groove. The upper and lower ends of the fixed seat are respectively connected to the neutralization input pipe and the neutralization output pipe. The mounting grooves are respectively arranged on the top and bottom sides of the fixed seat. The upper and lower movable plates are respectively inserted into the corresponding mounting grooves on both sides. The neutralization tank is made of corrosion-resistant stainless steel material and is arranged between the two movable plates in the fixed seat.

[0010] As a further technical solution, the reaction assembly further comprises rubber pads, which are arranged on the outer opening positions of the top and bottom of the neutralization tank corresponding to the positions of the neutralization input pipe and the neutralization output pipe.

[0011] As a further technical solution, it also includes a purified gas external delivery valve, which is arranged on the exhaust chimney.

[0012] As a further technical solution, a sulfur content detector is also included, and the sulfur content detector is arranged on the lower conveying pipe of the incinerator.

[0013] The beneficial effects of adopting the above technical scheme are: a sulfur tail gas recovery and reuse device, through this technical scheme, a dust collector is set on the boiler conveying pipe to remove dust from the transmitted gas to reduce impurities in the reaction gas, and a cleaning component is set inside the reactor and on the left and right sides, and the inner wall of the reactor is cleaned by a motor drive to avoid the accumulation of substances in the reactor and difficulty in entering the neutralization tank at the lower end. At the same time, a neutralization tank is set, and a rubber pad is set to seal the neutralization tank. The movable plate sets the neutralization tank inside the movable plate, which is convenient for replacing the neutralization tank; thereby, the inner wall of the reactor is cleaned more thoroughly, and the corrosive substances are pushed into the neutralization tank for neutralization reaction, which effectively reduces the corrosion to the overall equipment, reduces the amount of caustic soda, and simplifies the production process. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structure of the utility model;

[0015] Figure 2 It is a schematic diagram of a front cross-section of the structure of the utility model;

[0016] Figure 3 It is a front view schematic diagram of the structure of the movable frame of the utility model;

[0017] Figure 4 It is a side view schematic diagram of the neutralization tank structure of the utility model;

[0018] Figure 5 It is a side view schematic diagram of the structure of the movable frame of the utility model;

[0019] Figure 6 For this utility model Figure 5 A is a partial enlarged schematic diagram of the middle part.

[0020] In the figure, 1 is a tail gas incinerator, 2 is an exhaust chimney, 3 is a conveying pipe under the incinerator, 4 is a waste heat boiler, 5 is a boiler conveying pipe, 6 is a dust collector, 7 is a reactant, 8 is a container, 9 is a neutralization input pipe, 10 is a neutralization output pipe, 11 is a through hole, 12 is a shovel block, 13 is a movable hole, 14 is a movable frame, 15 is a support frame, 16 is a rack, 17 is a gear, 18 is a motor, 19 is a fixed seat, 20 is a movable plate, 21 is a neutralization tank, 22 is a mounting tank, 23 is a rubber pad, 24 is a purified gas delivery valve, and 25 is a sulfur content detector. DETAILED DESCRIPTION

[0021] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

[0022] like Figure 1-Figure 6 As shown, the sulfur tail gas recovery and reuse device involved in the utility model includes a tail gas incinerator 1, an exhaust chimney 2, an incinerator lower delivery pipe 3, a waste heat boiler 4 and a boiler delivery pipe 5, wherein the exhaust chimney 2 is arranged on the top of the tail gas incinerator 1, the upper end of the incinerator lower delivery pipe 3 is connected to the bottom of the tail gas incinerator 1, the lower end of the incinerator lower delivery pipe 3 is connected to the waste heat boiler 4, and one end of the boiler delivery pipe 5 is connected to the side wall of the waste heat boiler 4; it also includes a dust collector 6, a reaction body 7, a container 8, a neutralization input pipe 9, a neutralization output pipe 10, a cleaning component and a reaction component, and the reaction body 7 and the boiler delivery pipe 5 are connected at the other end. The dust collector 6 is connected to the boiler conveying pipe 5 in series, the container 8 is arranged on the upper end of the reaction body 7, and a plurality of through holes 11 are evenly arranged on the bottom of the container 8. The cleaning component is arranged inside and on the left and right sides of the reaction body 7. The reaction component is arranged below the reaction body 7, and the reaction component is connected to the reaction body 7 through the neutralization input pipe 9. When used, liquid alkali is contained in the container 8; the cleaning component can clean the inner wall of the reaction body 7, and the reaction component can neutralize the corrosive substances, and the neutralized corrosive substances are sent out through the neutralization output pipe 10.

[0023] As a further embodiment, the cleaning assembly includes a shovel block 12, a movable hole 13 and a movable frame 14, the two movable holes 13 are respectively arranged at the lower parts of both sides of the reaction body 7, the two groups of shovel blocks 12 are respectively arranged on both sides of the inner bottom of the reaction body 7, and the inner ends of the two movable frames 14 respectively pass horizontally through the corresponding movable holes 13 and are fixedly connected to the outer sides of the corresponding shovel blocks 12.

[0024] As a further embodiment, the cleaning assembly also includes a support frame 15, a rack 16, a gear 17 and a motor 18, the support frame 15 is arranged on the outer end of the movable frame 14, the rack 16 is arranged horizontally, the inner end of the rack 16 is fixed on the corresponding side wall of the reaction body 7, the motor 18 is fixed on the support frame 15, the gear 17 is fixed on the rotating shaft of the motor 18, the gear 17 is arranged below the rack 16, and the gear 17 is meshed with the rack 16.

[0025] As a further embodiment, the reaction assembly includes a fixed seat 19, a movable plate 20, a neutralization tank 21 and an installation groove 22. The upper and lower ends of the fixed seat 19 are respectively connected to the neutralization input pipe 9 and the neutralization output pipe 10. The installation grooves 22 are respectively arranged on the top and bottom sides of the fixed seat 19. The upper and lower movable plates 20 are respectively inserted into the corresponding installation grooves 22. The neutralization tank 21 is made of corrosion-resistant stainless steel material and is arranged between the two movable plates 20 in the fixed seat 19.

[0026] As a further embodiment, the reaction assembly further comprises a rubber pad 23 , and the rubber pad 23 is arranged at the outer opening positions of the top and bottom of the neutralization tank 21 corresponding to the positions of the neutralization input pipe 9 and the neutralization output pipe 10 .

[0027] As a further embodiment, it further comprises a purified gas external delivery valve 24 , and the purified gas external delivery valve 24 is arranged on the exhaust chimney 2 .

[0028] As a further embodiment, a sulfur content detector 25 is further included, and the sulfur content detector 25 is arranged on the lower conveying pipe 3 of the incinerator.

[0029] When the utility model is working, a control pipeline is provided on the tail gas incinerator 1 to be connected thereto, and the sulfur tail gas is transmitted from the control pipeline to the tail gas incinerator 1 through an air pump, and then the control pipeline is closed through an electronic control system; then the tail gas is burned inside the tail gas incinerator 1, and the gas in the sulfur tail gas is fully converted into sulfur dioxide and hydrogen sulfide. Since the gas density of hydrogen sulfide is lower, after a period of time in the tail gas incinerator 1, sulfur dioxide will be at the bottom, and hydrogen sulfide will be at the top; hydrogen sulfide and some excess gas are purified by the purified gas delivery valve 24 and then discharged from the exhaust chimney 2 to other storage equipment for secondary utilization or treatment. The purified gas delivery valve 24 also plays a purifying role, which can reduce the impurities in hydrogen sulfide and improve its purity for subsequent use; sulfur dioxide is transmitted downward to the waste heat boiler 4, wherein the sulfur content detector 25 detects the concentration and condition of sulfur dioxide, and transmits the detected information through the network The waste heat boiler 4 plays a certain cooling role, cooling the gas just reacted by combustion; after being cooled in the waste heat boiler 4, it is dedusted by the dust collector 6 to remove impurities in the sulfur dioxide, improve its purity, and transmit the sulfur dioxide to the reaction body 7; liquid alkali is added to the container 8, and the liquid alkali flows out from the through hole 11 at the bottom of the container 8, so that it is fully in reverse contact to generate sodium bisulfite. Sodium bisulfite is an inorganic compound. After drying and cooling, it is a white powder crystalline substance, and then the motor 18 drives the gear 17 to rotate alternately forward and reverse. The gear 17 and the rack 16 are engaged and drive the support frame 15 to move left and right. The support frame 15 will drive the movable frame 14 and the shovel block 12 to move left and right inside the reaction body 7. The shovel block 12 will clean the crystalline material and push it into the neutralization tank 21. Sodium hydroxide and sodium sulfite are added to the neutralization tank 21 for neutralization reaction. The sodium bisulfite is taken out and centrifuged and dried to obtain sodium sulfite crystals.

[0030] The above description is only a preferred embodiment of the present invention and is not intended to limit the scope of the present invention.

Claims

1. A sulfur tail gas recovery and reuse device, comprising a tail gas incinerator, an exhaust chimney, a lower conveying pipe of the incinerator, a waste heat boiler and a boiler conveying pipe, wherein the exhaust chimney is arranged on the top of the tail gas incinerator, the upper end of the lower conveying pipe of the incinerator is connected to the bottom of the tail gas incinerator, the lower end of the lower conveying pipe of the incinerator is connected to the waste heat boiler, and one end of the boiler conveying pipe is connected to the side wall of the waste heat boiler; characterized in that, It also includes a dust collector, a reaction body, a container, a neutralization input pipe, a neutralization output pipe, a cleaning component and a reaction component. The reaction body is connected to the other end of the boiler delivery pipe, the dust collector is connected in series to the boiler delivery pipe, the container is arranged on the upper end of the reaction body, a plurality of through holes are evenly arranged on the bottom of the container, the cleaning component is arranged inside and on both sides of the reaction body, the reaction component is arranged below the reaction body, and the reaction component is connected to the reaction body through the neutralization input pipe. When in use, liquid alkali is contained in the container; the cleaning component can clean the inner wall of the reaction body, the reaction component can neutralize corrosive substances, and the neutralized corrosive substances are sent out through the neutralization output pipe.

2. The sulfur tail gas recovery and recycling device according to claim 1, characterized in that: The cleaning assembly includes a shovel block, a movable hole and a movable frame. The two movable holes are respectively arranged at the lower parts of both sides of the reaction body, and the two groups of shovel blocks are respectively arranged at both sides of the inner bottom of the reaction body. The inner ends of the two movable frames respectively pass horizontally through the corresponding movable holes and are fixedly connected to the outer sides of the corresponding shovel blocks.

3. The sulfur tail gas recovery and recycling device according to claim 2, characterized in that: The cleaning assembly also includes a support frame, a rack, a gear and a motor. The support frame is arranged on the outer end of the movable frame, the rack is arranged horizontally, and the inner end of the rack is fixed on the corresponding side wall of the reaction body. The motor is fixed on the support frame, and the gear is fixed on the rotating shaft of the motor. The gear is arranged below the rack, and the gear is meshed with the rack.

4. The sulfur tail gas recovery and recycling device according to claim 1, characterized in that: The reaction assembly includes a fixed seat, a movable plate, a neutralization tank and a mounting groove. The upper end and the lower end of the fixed seat are respectively connected to the neutralization input pipe and the neutralization output pipe. The mounting grooves are respectively arranged on the top and bottom sides of the fixed seat. The upper and lower movable plates are respectively inserted into the corresponding mounting grooves on both sides. The neutralization tank is made of corrosion-resistant stainless steel material and is arranged between the two movable plates in the fixed seat.

5. The sulfur tail gas recovery and recycling device according to claim 4, characterized in that: The reaction assembly also includes a rubber pad, which is arranged on the outer opening positions of the top and bottom of the neutralization tank corresponding to the positions of the neutralization input pipe and the neutralization output pipe.

6. The sulfur tail gas recovery and recycling device according to claim 1, characterized in that: It also includes a purified gas external delivery valve, which is arranged on the exhaust chimney.

7. The sulfur tail gas recovery and recycling device according to claim 1, characterized in that: The invention also comprises a sulfur content detector, which is arranged on the lower conveying pipe of the incinerator.

Images