Waste heat recovery device for sulfonation process

Abstract

The invention discloses a waste heat recovery device of a sulfonation process, and relates to the technical field of waste heat recovery, the waste heat recovery device comprises a tank body and a treatment mechanism, an inner tank barrel is arranged in the tank body, a plurality of annular partition plates are arranged between the inner wall of the tank body and the outer wall of the inner tank barrel at equal intervals, and each partition plate is provided with a plurality of first water passing ports; a water inlet pipe is connected to the bottom of the tank body, a water outlet pipe is arranged on the side wall, close to the top, of the tank body, and the treatment mechanism is arranged between the inner wall of the tank body and the outer wall of the inner tank barrel and used for conducting scale treatment on the outer wall of the inner tank barrel. In the sulfonation production period, the lifting plate between the tank body and the inner tank barrel can be controlled to periodically slide up and down, on one hand, the lifting plate slides up and down to drive a scraping ring to scrape scale on the outer wall of the inner tank barrel, good heat exchange efficiency of the inner tank barrel is guaranteed, and on the other hand, the flowing speed of cooling water can be intermittently controlled; and heat absorbed by unit cooling water is improved, so that the utilization value of waste heat recovery is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of waste heat recovery, and in particular to a waste heat recovery device for a sulfonation process. Background Art

[0002] The sulfonation process usually involves a sulfonation reaction, which releases a large amount of heat. The heat released per unit mass of reactants can reach hundreds of kilojoules. In the existing technology, industrial sulfonation production generally adopts a tank reactor with a cooling jacket. This structure removes the reaction heat by circulating cooling water in the jacket, and at the same time recovers the waste heat to preheat the raw materials or the heating system, realizing comprehensive energy utilization.

[0003] After long-term use, the calcium and magnesium ions dissolved in the cooling water of the tank reactor with a cooling jacket precipitate at high temperature to form scale such as calcium carbonate and calcium sulfate, which adheres to the inner wall of the jacket. The presence of scale will lead to a decrease in the heat exchange efficiency of the inner wall of the jacket, which will affect the waste heat recovery efficiency on the one hand, and on the other hand, the reaction heat in the tank cannot be dissipated in time, which will easily lead to an increase in the temperature in the tank, affecting the quality of the sulfonated product. Since the cooling jacket is generally made together with the tank body, it is more troublesome to clean the inner wall of the cooling jacket. If the equipment is dismantled and shut down, it will not only be time-consuming and labor-intensive, but also affect the production efficiency. Therefore, a waste heat recovery device for a sulfonation process is proposed. Summary of the Invention

[0004] The purpose of the present invention is to solve the problems in the prior art and to propose a waste heat recovery device for a sulfonation process.

[0005] A waste heat recovery device for a sulfonation process comprises a tank body and a treatment mechanism, wherein an inner tank barrel is arranged in the tank body, a plurality of annular partitions are arranged at equal intervals between the inner wall of the tank body and the outer wall of the inner tank barrel, and a plurality of first water openings are opened on each of the partitions, a water inlet pipe is connected to the bottom of the tank body, and a water outlet pipe is arranged on the side wall of the tank body near the top, and the treatment mechanism is arranged between the inner wall of the tank body and the outer wall of the inner tank barrel and is used for performing scale treatment on the outer wall of the inner tank barrel.

[0006] Preferably, the processing mechanism includes a water pump, which is installed on the outer wall of the tank body, and the water pump is arranged on the pipeline of the water inlet pipe. An annular lifting plate is provided between each two adjacent partitions, and each of the lifting plates is sealed and slidably connected to the inner wall of the tank body and the outer wall of the inner tank tube. A plurality of fan-shaped second water outlets are provided at equal distances on each lifting plate, and a plurality of springs are connected to the bottom of each lifting plate, and the lower end of each spring is connected to the partition. A scraper ring is provided on the top and bottom surfaces of each lifting plate and near the inner ring, and a control unit is provided on each lifting plate and at each second water outlet for controlling the opening and closing of the second water outlet.

[0007] Preferably, each of the control units includes a fan-shaped fixed box, which is installed on the lifting plate and located on one side of the second water outlet. Each of the fixed boxes is sealed and slidably connected to a piston block, one side of the piston block is connected to an arc-shaped sliding rod, and the end of the sliding rod away from the piston block extends to the outside of the fixed box and is connected to a fan-shaped baffle. The sliding rod and the fixed box are sealed and slidably connected, and the fixed box is filled with evaporative liquid on the side of the piston block close to the sliding rod, and a through hole is opened at the end of the fixed box away from the sliding rod.

[0008] Preferably, a liquid inlet pipe is provided at the bottom of the inner tank barrel, the lower end of the liquid inlet pipe extends to the outside of the tank body, a discharge pipe is provided on the side wall of the tank body near the top, an air outlet is provided at the top of the tank body, a gas distributor is provided at the bottom of the inner tank barrel, and the gas distributor is externally connected to a gas supply pipe.

[0009] Preferably, a motor is installed on the top of the tank body, and a rotating shaft is rotatably connected to the center position of the top of the tank body. The rotating shaft passes through the tank body and is coaxially connected to the output shaft of the motor. A plurality of stirring blades are connected to the rotating shaft.

[0010] Preferably, the fixing box is made of a high thermal conductive material.

[0011] Preferably, the size of the baffle is larger than the size of the second water opening.

[0012] Compared with the existing technology, the advantages of the present invention are:

[0013] The present invention is provided with a processing mechanism, which can control the periodic up and down sliding of the lifting plate between the tank body and the inner tank barrel during the sulfonation production. On the one hand, the lifting plate is used to drive the scraper ring to scrape off the scale on the outer wall of the inner tank barrel when sliding up and down, thereby ensuring the good heat exchange efficiency of the inner tank barrel. On the other hand, the flow rate of the cooling water can be intermittently controlled to increase the heat absorbed by the unit cooling water, thereby improving the utilization value of waste heat recovery. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the present invention.

[0015] Figure 2 It is a structural schematic diagram of the present invention from another angle.

[0016] Figure 3 It is a cross-sectional view of the structure of the present invention.

[0017] Figure 4 It is a structural diagram of the processing mechanism in the present invention.

[0018] Figure 5 It is a structural cross-sectional view of the lifting plate in the present invention.

[0019] Figure 6 Schematic diagram of the structure of the control unit in the present invention.

[0020] In the figure: 1 tank body, 11 inner tank tube, 12 support leg, 13 discharge pipe, 14 liquid inlet pipe, 15 gas outlet, 16 gas distributor, 2 processing mechanism, 21 partition, 211 first water outlet, 22 lifting plate, 221 second water outlet, 23 spring, 24 water inlet pipe, 241 water pump, 25 water outlet pipe, 26 fixing box, 261 piston block, 262 slide rod, 263 baffle, 264 through hole, 27 scraper ring, 3 motor, 31 rotating shaft, 32 stirring blade. DETAILED DESCRIPTION

[0021] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0022] Reference Figure 1-6 As shown, a waste heat recovery device for a sulfonation process includes a tank body 1 and a treatment mechanism 2, wherein an inner tank barrel 11 is provided in the tank body 1, and a plurality of annular partitions 21 are provided at equal intervals between the inner wall of the tank body 1 and the outer wall of the inner tank barrel 11, and each of the partitions 21 is provided with a plurality of first water openings 211, a water inlet pipe 24 is connected to the bottom of the tank body 1, and a water outlet pipe 25 is provided on the side wall of the tank body 1 near the top, and the water outlet pipe 25 is connected to the space between the tank body 1 and the inner tank barrel 11, and the treatment mechanism 2 is provided between the inner wall of the tank body 1 and the outer wall of the inner tank barrel 11 and is used for scaling the outer wall of the inner tank barrel 11.

[0023] In this embodiment, the processing mechanism 2 includes a water pump 241, which is installed on the outer wall of the tank body 1. The water pump 241 is arranged on the pipeline of the water inlet pipe 24. An annular lifting plate 22 is arranged between each adjacent two partitions 21. Each of the lifting plates 22 is sealed and slidably connected to the inner wall of the tank body 1 and the outer wall of the inner tank tube 11. A plurality of fan-shaped second water openings 221 are opened at equal distances on each of the lifting plates 22. A plurality of springs 23 are connected to the bottom of each of the springs 23, and the lower end of each of the springs 23 is connected to the partition 21. A scraper ring 27 is arranged on the top and bottom surfaces of each of the lifting plates 22 and near the inner ring. A control unit is provided on each of the lifting plates 22 and at each second water opening 221 for controlling the opening and closing of the second water opening 221.

[0024] In this embodiment, each of the control units includes a fan-shaped fixed box 26, which is installed on the lifting plate 22 and located on one side of the second water outlet 221. Each of the fixed boxes 26 is sealed and slidably connected to a piston block 261, and one side of the piston block 261 is connected to a circular arc-shaped slide rod 262. The end of the slide rod 262 away from the piston block 261 extends to the outside of the fixed box 26 and is connected to a fan-shaped baffle 263. The slide rod 262 is sealed and slidably connected to the fixed box 26. The fixed box 26 is filled with evaporative liquid on the side of the piston block 261 close to the slide rod 262. The evaporative liquid is an acetone solution with a boiling point of 56°C. When the equipment is not in use, the evaporative liquid in the fixed box 26 is always in liquid state. At this time, the position of the piston block 261 just pushes the baffle 263 to completely cover the second water outlet 221. A through hole 264 is opened at the end of the fixed box 26 away from the slide rod 262.

[0025] In this embodiment, a liquid inlet pipe 14 is provided at the bottom of the inner tank barrel 11, and the lower end of the liquid inlet pipe 14 extends to the outside of the tank body 1. A discharge pipe 13 is provided on the side wall of the tank body 1 near the top, and an air outlet 15 is provided at the top of the tank body 1. A gas distributor 16 is provided at the bottom of the inner tank barrel 11, and the gas distributor 16 is externally connected to a gas supply pipe.

[0026] In this embodiment, a motor 3 is installed on the top of the tank body 1, and a rotating shaft 31 is rotatably connected to the center position of the top of the tank body 1. The rotating shaft 31 passes through the tank body 1 and is coaxially connected to the output shaft of the motor 3. A plurality of stirring blades 32 are connected to the rotating shaft 31.

[0027] In this embodiment, the fixing box 26 is made of a high thermal conductivity material to facilitate rapid conduction of water temperature into the fixing box 26 . The size of the baffle 263 is larger than the size of the second water opening 221 .

[0028] The working process and principle of the present invention are as follows:

[0029] During use, the discharge pipe 13 is closed, the sulfonation reactant is introduced into the inner tank 11 through the liquid inlet pipe 14, and the sulfonating agent (sulfur trioxide gas mixed with air) is evenly sprayed out through the gas supply pipe and the gas distributor 16 to contact the sulfonation reactant to cause a sulfonation reaction. During this period, the motor 3 is turned on to drive the stirring blade 32 to rotate, so that the sulfonation reactant and the sulfonating agent are evenly mixed.

[0030] After the sulfonation reaction begins, the water pump 241 is turned on to supply water to the space between the tank body 1 and the inner tank tube 11. First, the cooling water is used to cover and surround the bottom area of ​​the inner tank tube 11 to absorb and cool the residual heat generated by the initial sulfonation reaction. Since the second water inlet 221 on the lifting plate 22 is in a blocked state at this time, the water pressure will push the lifting plate 22 to slide upward. As the cooling water temperature gradually increases, the evaporative liquid in the fixed box 26 will be heated. When the temperature exceeds the boiling point of the evaporative liquid, the evaporative liquid will vaporize and expand, pushing the piston block 261 to slide toward the side of the through hole 264, and the baffle 263 will be pulled to move by the sliding rod 262, and the second water inlet 221 will no longer be covered. The cooling water will pass through the bottom lifting plate 22, and after the lifting plate 22 loses water pressure, it will slide back to its initial position under the pull of the spring 23. After the cooling water flows up, it will push the higher lifting plate 22 upward. As the sulfonation reactants and sulfonating agent in the inner tank 11 continue to increase, the liquid level of the inner tank 11 will also increase, the sulfonation reaction will intensify, and the heat generated will be through the action of the cooling water on the evaporating liquid in the fixed box 26 on the lifting plate 22 at a higher position, gradually making the second water inlet 221 on each lifting plate 22 open. The advantage of this is that it slows down the initial flow of cooling water, avoids the low heat generated in the initial stage of the sulfonation reaction, and avoids the waste heat recovery caused by excessive cooling water flow. To solve the problem of low collection efficiency, when the second water outlet 221 on all the lifting plates 22 is opened, the cooling water after absorbing heat will be discharged from the water outlet pipe 25, and the cooling water will flow smoothly between the tank body 1 and the inner tank tube 11, the flow rate of the cold water will be accelerated, the water temperature will be reduced, and the evaporated liquid gas in the fixed box 26 will turn into liquid again. The pressure on the side of the fixed box 26 on the slide rod 262 is reduced, and the piston block 261 slides under the action of water pressure and air pressure, and pushes the baffle 263 to move through the slide rod 262 to cover the second water outlet 221. The water pressure will push the lifting plate 22 to slide again. After the cooling water stops flowing, the temperature gradually rises due to heat absorption, and the fixed box 26 is cooled again. The evaporating liquid is heated to open the second water inlet 221 on the lifting plate 22 again, and the lifting plate 22 slides down under the action of the spring 23. During the sulfonation production, the lifting plate 22 between the tank body 1 and the inner tank barrel 11 will slide up and down periodically. On the one hand, the lifting plate 22 can be used to drive the scraper ring 27 to scrape off the scale on the outer wall of the inner tank barrel 11 when sliding up and down, thereby ensuring the good heat exchange efficiency of the inner tank barrel 11. On the other hand, the flow rate of the cooling water can be intermittently controlled to increase the heat absorbed by the unit cooling water (which means that the recovered heat is of higher quality and higher water temperature, and can be directly used for preheating raw materials, heating or power generation), thereby improving the utilization value of waste heat recovery.

[0031] It is understood from common technical knowledge that the present invention may be implemented by other embodiments that do not depart from its spirit or essential features. Therefore, the embodiments disclosed above are, in all respects, merely illustrative and not exclusive. All modifications within the scope of the present invention or equivalent to the scope of the present invention are intended to be encompassed by the present invention.

Claims

1. A waste heat recovery device for a sulfonation process, characterized in that: The invention comprises a tank body (1) and a treatment mechanism (2), wherein an inner tank barrel (11) is provided in the tank body (1), a plurality of annular partitions (21) are provided at equal intervals between the inner wall of the tank body (1) and the outer wall of the inner tank barrel (11), and each of the partitions (21) is provided with a plurality of first water openings (211), a water inlet pipe (24) is connected to the bottom of the tank body (1), and a water outlet pipe (25) is provided on the side wall of the tank body (1) near the top, and the treatment mechanism (2) is provided between the inner wall of the tank body (1) and the outer wall of the inner tank barrel (11) and is used for performing scale treatment on the outer wall of the inner tank barrel (11).

2. The waste heat recovery device for a sulfonation process according to claim 1, characterized in that: The treatment mechanism (2) comprises a water pump (241), which is mounted on the outer wall of the tank body (1). The water pump (241) is arranged on the pipeline of the water inlet pipe (24). An annular lifting plate (22) is arranged between each two adjacent partitions (21). Each lifting plate (22) is sealingly and slidingly connected to the inner wall of the tank body (1) and the outer wall of the inner tank tube (11). A plurality of fan-shaped second water openings (221) are equidistantly provided on each lifting plate (22). A plurality of springs (23) are connected to the bottom of each lifting plate (22). The lower end of each spring (23) is connected to the partition (21). A scraper ring (27) is arranged on the top and bottom surfaces of each lifting plate (22) and close to the inner ring. A control unit is provided on each lifting plate (22) and located at each second water opening (221) for controlling the opening and closing of the second water opening (221).

3. The waste heat recovery device for a sulfonation process according to claim 2, characterized in that: Each of the control units comprises a fan-shaped fixed box (26), the fixed box (26) being mounted on the lifting plate (22) and being located on one side of the second water outlet (221), a piston block (261) being sealed and slidably connected in each of the fixed boxes (26), a circular arc-shaped sliding rod (262) being connected to one side of the piston block (261), an end of the sliding rod (262) away from the piston block (261) extending to the outside of the fixed box (26) and being connected to a fan-shaped baffle (263), the sliding rod (262) and the fixed box (26) being sealed and slidably connected, the fixed box (26) being filled with evaporative liquid on one side of the piston block (261) close to the sliding rod (262), and a through hole (264) being provided at one end of the fixed box (26) away from the sliding rod (262).

4. The waste heat recovery device for a sulfonation process according to claim 1, characterized in that: A liquid inlet pipe (14) is provided at the bottom of the inner barrel (11), the lower end of the liquid inlet pipe (14) extends to the outside of the tank body (1), a discharge pipe (13) is provided on the side wall of the tank body (1) near the top, an air outlet (15) is provided at the top of the tank body (1), and a gas distributor (16) is provided at the bottom of the inner barrel (11), and the gas distributor (16) is externally connected to a gas supply pipe.

5. The waste heat recovery device for a sulfonation process according to claim 1, characterized in that: A motor (3) is installed on the top of the tank body (1), and a rotating shaft (31) is rotatably connected to the center position of the top of the tank body (1). The rotating shaft (31) passes through the tank body (1) and is coaxially connected to the output shaft of the motor (3). A plurality of stirring blades (32) are connected to the rotating shaft (31).

6. The waste heat recovery device for a sulfonation process according to claim 3, characterized in that: The fixing box (26) is made of a high thermal conductivity material.

7. The waste heat recovery device for a sulfonation process according to claim 3, characterized in that: The size of the baffle (263) is larger than the size of the second water opening (221).

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