Sodium metabisulfite synthesis reactor

Abstract

The utility model discloses a kind of sodium metabisulfite synthesis reactor, belong to sodium metabisulfite technical field, to the space in reaction tank is big, sulfur dioxide is difficult to contact with suspension, cause the problem of low reaction efficiency, including reaction tank, first entering pipe is connected with the side of reaction tank top surface through, second entering pipe is connected with the side of reaction tank top surface through, air inlet pipe is connected with the other side of reaction tank top surface through, and circulating pump is arranged in the side of reaction tank;The liquid in the reaction tank can be circulated by the circulating pump, and then contact with sulfur dioxide gas;By the rectangular pipe being set, the sulfur dioxide gas entering from air pipe and the liquid in rectangular pipe can contact;By the spiral pipe being set, the sulfur dioxide gas and liquid in rectangular pipe can increase the path of movement in spiral pipe, so that the sulfur dioxide gas can be contacted with liquid fully, and then facilitate in reaction tank fully reacts, improve reaction efficiency.

Description

Technical Field

[0001] This utility model belongs to the field of sodium metabisulfite technology, specifically relating to a sodium metabisulfite synthesis reactor. Background Technology

[0002] The existing wet process for producing sodium metabisulfite uses a bubbling reaction of sulfur dioxide gas. In this process, sulfur dioxide gas is introduced into the reactor, and soda ash or caustic soda flakes are mixed with the mother liquor in a preparation vessel to form a suspension, which is then pumped into the reactor. This allows the suspension to react with the sulfur dioxide gas in the reaction tank. However, due to the large space inside the reaction tank, it is difficult for the sulfur dioxide to fully contact the suspension, resulting in low reaction efficiency.

[0003] Therefore, a sodium metabisulfite synthesis reactor is needed to solve the problem of low reaction efficiency caused by the large space inside the reaction tank in the existing technology, which makes it difficult for sulfur dioxide to fully contact the suspension. Utility Model Content

[0004] The purpose of this invention is to provide a sodium metabisulfite synthesis reactor to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a sodium metabisulfite synthesis reactor, comprising a reaction vessel, a first inlet pipe connected through one side of the top surface of the reaction vessel, a second inlet pipe connected through one side of the top surface of the reaction vessel, an air inlet pipe connected through the other side of the top surface of the reaction vessel, a circulation pump provided on one side of the reaction vessel, the input end of the circulation pump being connected through to the bottom of the outer wall of the reaction vessel, the output end of the circulation pump being connected to a connecting pipe, one end of the connecting pipe being connected to the air inlet pipe, a rectangular tube being connected through to one end of the connecting pipe, a spiral tube being connected through to the top surface of the rectangular tube, and a venting pipe being connected through to the bottom surface of the rectangular tube.

[0006] It should be noted in the solution that a collection hopper is fixed at the top of the vent pipe, and the outer wall of the collection hopper is fixed to the inner wall of the vent pipe.

[0007] It is worth noting that a top plate is fixed in the middle of the top surface of the reaction vessel, a rotating rod is movably connected to the top surface of the top plate, and several evenly distributed stirring rods are fixed on the outer wall of the rotating rod.

[0008] Furthermore, it should be noted that a first gear is fixed to the top of the outer wall of the rotating rod, a motor is fixed to one side of the top surface of the top plate, and a second gear is fixed to the output end of the motor. The first gear meshes with the second gear.

[0009] In a preferred embodiment, a drain pipe is connected through the bottom of the outer wall of the reaction vessel, and a valve is provided on the outer wall of the drain pipe.

[0010] Compared with the prior art, the sodium metabisulfite synthesis reactor provided by this utility model has at least the following beneficial effects:

[0011] The first inlet pipe allows soda ash to enter the reaction vessel; the second inlet pipe allows mother liquor to enter the reaction vessel; a circulation pump circulates the liquid in the reaction vessel, bringing it into contact with sulfur dioxide gas; a rectangular tube allows sulfur dioxide gas entering from the vent pipe to contact the liquid inside the rectangular tube; and a spiral tube increases the movement path of the sulfur dioxide gas and liquid within the rectangular tube, ensuring sufficient contact between the sulfur dioxide gas and liquid, thus facilitating a more complete reaction within the reaction vessel and improving reaction efficiency. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0013] Figure 2 This is a schematic diagram of the stirring rod structure of this utility model;

[0014] Figure 3 This is a schematic diagram of the spiral tube structure of this utility model.

[0015] In the picture:

[0016] 100. Reaction vessel; 101. First inlet pipe; 102. Second inlet pipe;

[0017] 200. Top plate; 201. Rotating rod; 202. Stirring rod; 203. First gear; 204. Motor; 205. Second gear;

[0018] 300. Circulating pump; 301. Connecting pipe; 302. Air inlet pipe;

[0019] 400. Rectangular tube; 401. Spiral tube; 402. Ventilation tube; 403. Collection hopper;

[0020] 500, drain pipe; 501, valve. Detailed Implementation

[0021] Please see Figures 1-3This utility model provides a sodium metabisulfite synthesis reactor, including a reaction vessel 100. A first inlet pipe 101 is connected to one side of the top surface of the reaction vessel 100, a second inlet pipe 102 is connected to one side of the top surface of the reaction vessel 100, and an air inlet pipe 302 is connected to the other side of the top surface of the reaction vessel 100. A circulation pump 300 is provided on one side of the reaction vessel 100. The input end of the circulation pump 300 is connected to the bottom of the outer wall of the reaction vessel 100, and the output end of the circulation pump 300 is connected to a connecting pipe 301. One end of the connecting pipe 301 is connected to the air inlet pipe 302, and one end of the connecting pipe 301 is connected to a rectangular pipe 400. A spiral pipe 401 is connected to the top surface of the rectangular pipe 400, and a vent pipe 402 is connected to the bottom surface of the rectangular pipe 400.

[0022] Further as Figure 3 As shown, a collection hopper 403 is fixed to the top of the vent pipe 402, and the outer wall of the collection hopper 403 is fixed to the inner wall of the air inlet pipe 302.

[0023] The collection hopper 403 allows the sulfur dioxide gas discharged from above the air inlet pipe 302 to be collected by the collection hopper 403, thus facilitating its entry into the vent pipe 402 and allowing it to fully contact the liquid inside the rectangular tube 400.

[0024] Further as Figure 2 As shown, a top plate 200 is fixed in the middle of the top surface of the reaction vessel 100, and a rotating rod 201 is movably connected to the top surface of the top plate 200. Several uniformly distributed stirring rods 202 are fixed on the outer wall of the rotating rod 201.

[0025] The rotating rod 201 and stirring rod 202 allow the liquid in the reaction vessel 100 to be stirred, thus facilitating the full mixing and reaction of soda ash and mother liquor.

[0026] Further as Figure 2 As shown, a first gear 203 is fixed to the top of the outer wall of the rotating rod 201, a motor 204 is fixed to one side of the top surface of the top plate 200, and a second gear 205 is fixed to the output end of the motor 204. The first gear 203 meshes with the second gear 205.

[0027] The motor 204, the first gear 203, and the second gear 205 enable the rotating rod 201 to rotate, which in turn drives the stirring rod 202 to rotate, thereby stirring and blending the liquid in the reaction vessel 100.

[0028] Further as Figure 2 As shown, a drain pipe 500 is connected through the bottom of the outer wall of the reaction vessel 100, and a valve 501 is provided on the outer wall of the drain pipe 500.

[0029] The drain pipe 500 and valve 501 allow the reaction mixture in the reaction tank 100 to be discharged into the external cooling equipment, thereby facilitating the crystallization and precipitation of sodium metabisulfite.

[0030] The inlet pipe 302 is connected at its top to a sulfur dioxide discharge pipe for injecting sulfur dioxide gas into the inlet pipe 302. A pressurized tank is placed around the reaction tank 100, and a soda ash dry powder silo is installed on the top of the pressurized tank. The soda ash dry powder silo is connected to the pressurized tank through a connecting pipe, and a valve 501 is installed around the connecting pipe to control the discharge of soda ash from the soda ash dry powder silo. A conveying pipe is connected to the outer wall of the pressurized tank, and one end of the conveying pipe is connected to the first inlet pipe 302. A valve 501 is installed on the outer wall of the conveying pipe. Soda ash is stored in the soda ash dry powder silo for supplying soda ash to the reaction tank 100. The bottom of the pressurized tank is connected to a nitrogen storage tank. A mother liquor conveying pipe is connected at its top of the second inlet pipe 102, and a valve 501 is installed on the outer wall of the mother liquor conveying pipe.

[0031] This scheme includes the following working process: When synthesizing sodium metabisulfite, firstly, the valve on the mother liquor delivery pipe is opened, and then the mother liquor is poured from the mother liquor delivery pipe into the reaction tank 100. Then, the valve on the mother liquor delivery pipe is closed. Next, the valve on the connecting pipe is opened, allowing the soda ash in the soda ash dry powder silo to enter the pressure tank through the connecting pipe. After a certain amount of soda ash has been added, the valve on the connecting pipe is closed. Then, the nitrogen storage tank is opened, and the nitrogen in the nitrogen storage tank enters the pressure tank. Once the nitrogen in the pressure tank reaches a certain pressure, the nitrogen storage tank is closed, and the valve on the pressure tank delivery pipe is opened. A pressure difference is created between the nitrogen in the pressure tank and the external environment, causing the nitrogen in the pressure tank to carry the soda ash into the second inlet pipe 102, thereby… The soda ash enters the reaction tank 100, bringing it into contact with the mother liquor. Nitrogen gas entering the reaction tank 100 is discharged through the second inlet pipe 102. Then, the valve 501 on the mother liquor delivery pipe and the valve on the delivery pipe on the outer wall of the pressurized tank are closed. The motor 204 is started, and its rotation drives the second gear 205 to rotate. The rotation of the second gear 205 drives the first gear 203 to rotate, which in turn drives the rotating rod 201 and the stirring rod 202 to rotate, thoroughly mixing and fusing the soda ash and mother liquor. Then, the circulation pump 300 is started and the valve 501 on the sulfur dioxide discharge pipe is opened. The circulation pump 300 injects the liquid in the reaction tank 100 into the rectangular pipe 400 through the connecting pipe 301, and then into the spiral pipe 401, finally discharging it from the spiral pipe 401. Sulfur dioxide enters the discharge pipe and then the inlet pipe 302, where it is collected by the collection hopper 403. This allows the sulfur dioxide gas to enter the vent pipe 402 and then be discharged into the rectangular pipe 400. The sulfur dioxide gas and liquid in the rectangular pipe 400 come into full contact and flow in the spiral tube 401. Since the reaction between sulfur dioxide gas and liquid requires time, the sulfur dioxide gas and liquid cannot react quickly in the spiral tube 401; they merely come into contact. The liquid discharged from the spiral tube 401 eventually enters the reaction tank 100. Since the liquid discharged from the spiral tube 401 into the reaction tank 100 is mixed with sulfur dioxide gas, the liquid is driven by the stirring rod 202 to fully react after entering the reaction tank 100. The circulation pump 300 continuously circulates the liquid in the reaction tank 100 back into the spiral tube 401, allowing it to come into contact with the sulfur dioxide gas. This ensures that the liquid can fully contact the sulfur dioxide and ultimately react in the reaction tank 100. After the reaction is completed, the circulation pump 300 is turned off and the sulfur dioxide gas supply is stopped. The valve 501 on the drain pipe 500 is opened, allowing the mixture to be discharged from the drain pipe 500 into an external cooling device. The mixture is cooled to precipitate sodium metabisulfite. The sodium metabisulfite crystals can then be separated from the liquid by centrifugation or filtration.

[0032] According to the above working process: the first inlet pipe 101 allows soda ash to enter the reaction tank 100; the second inlet pipe 102 allows the mother liquor to enter the reaction tank 100; the circulation pump 300 circulates the liquid in the reaction tank 100, allowing it to come into contact with sulfur dioxide gas; the rectangular tube 400 allows the sulfur dioxide gas entering from the vent pipe 402 to come into contact with the liquid in the rectangular tube 400; the spiral tube 401 increases the movement path of the sulfur dioxide gas and liquid in the rectangular tube 400, allowing the sulfur dioxide gas to come into full contact with the liquid, thus facilitating a full reaction in the reaction tank 100 and improving reaction efficiency.

[0033] In summary: During the synthesis reaction of sodium metabisulfite, firstly, open the valve on the mother liquor delivery pipe, then pour the mother liquor from the mother liquor delivery pipe into reaction tank 100, and then close the valve on the mother liquor delivery pipe. Next, open the valve on the connecting pipe, allowing the soda ash in the soda ash dry powder silo to enter the pressure tank through the connecting pipe. After a certain amount of soda ash has been added, close the valve on the connecting pipe. Then, open the nitrogen storage tank, allowing nitrogen from the nitrogen storage tank to enter the pressure tank. Once the nitrogen in the pressure tank reaches a certain pressure, close the nitrogen storage tank and open the valve on the pressure tank delivery pipe. This creates a pressure difference between the nitrogen in the pressure tank and the external environment, causing the nitrogen in the pressure tank to carry the soda ash into the second inlet pipe 102, thus entering the reaction tank. Inside tank 100, soda ash comes into contact with the mother liquor. Nitrogen gas entering tank 100 is discharged from the second inlet pipe 102. Then, valve 501 on the mother liquor delivery pipe and valve on the delivery pipe on the outer wall of the pressurized tank are closed. Motor 204 is started. The rotation of motor 204 drives the second gear 205 to rotate. The rotation of the second gear 205 drives the first gear 203 to rotate, which in turn drives the rotating rod 201 and the stirring rod 202 to rotate, fully stirring and mixing the soda ash and mother liquor. Then, circulation pump 300 is started and valve 501 on the sulfur dioxide discharge pipe is opened. Circulation pump 300 injects the liquid in tank 100 into rectangular pipe 400 through connecting pipe 301, then into spiral pipe 401, and finally discharged from spiral pipe 401. Sulfur dioxide enters the discharge pipe and then the inlet pipe 302, where it is collected by the collection hopper 403. This allows the sulfur dioxide gas to enter the vent pipe 402 and then be discharged into the rectangular pipe 400. The sulfur dioxide gas and liquid in the rectangular pipe 400 come into full contact and flow in the spiral tube 401. Since the reaction between sulfur dioxide gas and liquid requires time, the sulfur dioxide gas and liquid cannot react quickly in the spiral tube 401; they merely come into contact. The liquid discharged from the spiral tube 401 eventually enters the reaction tank 100. Since the liquid discharged from the spiral tube 401 into the reaction tank 100 is mixed with sulfur dioxide gas, the liquid is driven by the stirring rod 202 to fully react after entering the reaction tank 100. The circulation pump 300 continuously circulates the liquid in the reaction tank 100 back into the spiral tube 401, allowing it to come into contact with the sulfur dioxide gas. This ensures that the liquid can fully contact the sulfur dioxide and ultimately react in the reaction tank 100. After the reaction is completed, the circulation pump 300 is turned off and the sulfur dioxide gas supply is stopped. The valve 501 on the drain pipe 500 is opened, allowing the mixture to be discharged from the drain pipe 500 into an external cooling device. The mixture is cooled to precipitate sodium metabisulfite. The sodium metabisulfite crystals can then be separated from the liquid by centrifugation or filtration.

[0034] The motor 204 and the circulating pump 300 can be purchased from the market and are mature technologies in this field, which have been fully disclosed. Therefore, they will not be described again in the specification.

[0035] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A sodium metabisulfite synthesis reactor, comprising a reaction vessel (100), characterized in that, A first inlet pipe (101) is connected through one side of the top surface of the reaction vessel (100), a second inlet pipe (102) is connected through one side of the top surface of the reaction vessel (100), an air inlet pipe (302) is connected through the other side of the top surface of the reaction vessel (100), a circulation pump (300) is provided on one side of the reaction vessel (100), the input end of the circulation pump (300) is connected through the bottom of the outer wall of the reaction vessel (100), the output end of the circulation pump (300) is connected to a connecting pipe (301), one end of the connecting pipe (301) is connected to the air inlet pipe (302), one end of the connecting pipe (301) is connected through a rectangular pipe (400), the top surface of the rectangular pipe (400) is connected through a spiral pipe (401), and the bottom surface of the rectangular pipe (400) is connected through a vent pipe (402).

2. The sodium metabisulfite synthesis reactor according to claim 1, characterized in that: The top end of the vent pipe (402) is fixed with a collection hopper (403), and the outer side wall of the collection hopper (403) is fixed with the inner side wall of the air inlet pipe (302).

3. The sodium metabisulfite synthesis reactor according to claim 1, characterized in that: A top plate (200) is fixed in the middle of the top surface of the reaction vessel (100). A rotating rod (201) is movably connected to the top surface of the top plate (200). Several uniformly distributed stirring rods (202) are fixed on the outer wall of the rotating rod (201).

4. The sodium metabisulfite synthesis reactor according to claim 3, characterized in that: A first gear (203) is fixed to the top of the outer wall of the rotating rod (201), a motor (204) is fixed to one side of the top surface of the top plate (200), and a second gear (205) is fixed to the output end of the motor (204). The first gear (203) meshes with the second gear (205).

5. The sodium metabisulfite synthesis reactor according to claim 1, characterized in that: A drain pipe (500) is connected to the bottom of the outer wall of the reaction vessel (100), and a valve (501) is provided on the outer wall of the drain pipe (500).

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