Equipment for preparing acid from coking desulfurization waste liquid and preparation method thereof

Abstract

The invention belongs to the technical field of acid making equipment, and discloses coking desulfurization waste liquid acid making equipment and a preparation method thereof.The coking desulfurization waste liquid acid making equipment comprises a mixing box, a cover plate is installed at the top end of the mixing box through bolts, a liquid inlet pipe is fixedly installed at the top end of the cover plate, a pipeline is fixedly connected to the side wall of the mixing box, and a first electromagnetic valve is installed on the outer wall of the pipeline; a pipeline is arranged in the mixing box, a drying structure is arranged at the end, away from the mixing box, of the pipeline, a drying structure and a reaction structure are arranged on one side of the drying structure, and a mixing assembly is arranged in the mixing box. The mixing shaft rotates to drive the filter frame to rotate, desulfurization waste liquid is mixed, the motor is turned off after mixing, suspended solids in the desulfurization waste liquid gradually sink to the bottom of the liquid to be physically separated from supernatant liquid, impurities contained in the waste liquid are reduced, and therefore the treatment efficiency of the whole process is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of acid-making equipment, and in particular relates to an acid-making equipment for coking desulfurization waste liquid and a preparation method thereof. Background Art

[0002] Coking desulfurization waste liquid acid making equipment is a special equipment used to treat the desulfurization waste liquid generated in the coking process and convert it into sulfuric acid. The equipment is usually composed of a raw material pretreatment system, an incineration system, a conversion system, an absorption system and an exhaust gas treatment system. When making acid, the desulfurization waste liquid is first pretreated, and then sulfur dioxide gas is generated by combustion. Under the action of a catalyst, the sulfur dioxide gas is converted into sulfur trioxide, and the sulfur trioxide gas is absorbed by water or concentrated sulfuric acid. Finally, sulfuric acid products are generated. Multiple systems are coordinated to achieve efficient and environmentally friendly treatment of desulfurization waste liquid;

[0003] After searching, such as patent: CN212450713U, a sulfuric acid production device for coking desulfurization waste liquid, including a mixing box, a liquid inlet is fixedly installed on the upper surface of the mixing box, a drying box is fixedly installed on the lower surface of the mixing box, a motor cabinet is fixedly installed on one side of the mixing box, an oven is fixedly installed on one side of the drying box, a reactor is fixedly connected to one side of the oven, the mixing box, the oven and the reactor are fixedly connected through a pipeline, a feed inlet is provided on one side of the oven, a discharge port is provided on one side of the drying box, the discharge port is connected to the feed inlet through a pipeline, an air inlet is provided on the upper surface of the reactor, a No. 1 air outlet is provided on the upper surface of the oven, the No. 1 air outlet is connected to the air inlet through the pipeline, and an air pump is fixedly installed on the upper surface of the pipeline, and a high-temperature air outlet is provided on one side of the oven. The device has low pollution, can make sulfur trioxide fully react, and improve the acid production efficiency;

[0004] When the current acid production equipment is working, the desulfurization waste liquid is mixed and directly enters the next process. When the waste liquid contains a large amount of suspended matter, heavy metal ions or other insoluble substances, the waste liquid after stirring still contains large particles or impurities that have not been completely precipitated. These substances will increase the difficulty of the subsequent treatment process when entering the subsequent treatment equipment, and the treatment efficiency will be reduced. Summary of the invention

[0005] The object of the present invention is to provide a coking desulfurization waste liquid acid production equipment and a preparation method thereof, so as to solve the problems raised in the above background technology.

[0006] In order to achieve the above-mentioned object, the present invention provides the following technical scheme: a coking desulfurization waste liquid acid-making equipment, comprising a mixing box, a cover plate is installed on the top of the mixing box by bolts, a liquid inlet pipe is fixedly installed on the top of the cover plate, a pipeline is fixedly connected to the side wall of the mixing box, a first solenoid valve is installed on the outer wall of the pipeline, a drying structure is arranged at one end of the pipeline away from the mixing box, a drying structure and a reaction structure are arranged on one side of the drying structure, and a mixing assembly is arranged inside the mixing box;

[0007] The mixing assembly includes a mixing shaft arranged inside a mixing box, a first gear is fixedly connected to the top end of the mixing shaft, the first gear is rotatably installed inside a cover plate, a second gear is meshingly connected to one side of the first gear, a rotating shaft is fixedly installed on the inner wall of the second gear, a motor is fixedly connected to the top end of the rotating shaft, a fixing plate is fixedly installed on the outer wall of the mixing shaft, the fixing plates are evenly arranged in a circular array, and a filter frame is installed on one side of each fixing plate.

[0008] As a further technical solution of the present invention, a feeding pipe is fixedly connected to the top end of the mixing shaft, and the feeding pipe is rotatably installed inside the cover plate. The inner wall of the mixing shaft is evenly provided with through holes.

[0009] As a further technical solution of the present invention, a filter plate is fixedly installed inside the filter frame.

[0010] As a further technical solution of the present invention, the filter frame is slidably connected to the fixed plate.

[0011] As a further technical solution of the present invention, a filter screen is provided at one end of the pipeline, and the filter screen is installed inside the mixing box.

[0012] As a further technical solution of the present invention, a connection block is fixedly connected to the top of the filter screen, and the connection block is slidably installed on the inner wall of the mixing box.

[0013] As a further technical solution of the present invention, a liquid outlet pipe is arranged below the mixing shaft, the liquid outlet pipe is fixedly connected to the mixing box, a second solenoid valve is installed on the outer wall of the liquid outlet pipe, the second solenoid valve is arranged inside the liquid storage tank, the liquid storage tank is fixedly installed at the bottom end of the mixing box, and a drain pipe is installed on the side wall of the liquid storage tank.

[0014] As a further technical solution of the present invention, a limiting rod is embedded in the interior of the connection block, a slide plate is fixedly installed on the top end of the limiting rod, and the slide plate is arranged at the bottom end of the bolt.

[0015] As a further technical solution of the present invention, the slide plate is slidably mounted on the inner wall of the mixing box, and a spring is provided at the bottom end of the slide plate.

[0016] A method for preparing a coking desulfurization waste liquid acid-making device comprises the following steps:

[0017] S1: First, discharge the desulfurized waste liquid into the mixing box through the liquid inlet pipe, and then start the motor. The start of the motor drives the rotation of the rotating shaft, the rotation of the rotating shaft drives the rotation of the second gear, the rotation of the second gear drives the rotation of the first gear, the rotation of the first gear drives the rotation of the mixing shaft, the rotation of the mixing shaft drives the rotation of the fixed plate, the rotation of the fixed plate drives the rotation of the filter frame, the rotation of the filter frame drives the rotation of the filter plate, and stirs the desulfurized waste liquid;

[0018] S2: Then the additive is put into the feeding pipe, and the additive enters the interior of the mixing shaft. During the rotation of the mixing shaft, the additive inside is discharged from the through hole, forming multiple mixing points in the desulfurization waste liquid;

[0019] S3: After mixing, the motor is turned off to allow the suspended matter in the desulfurized waste liquid to gradually sink to the bottom of the liquid and be physically separated from the upper clear liquid. After separation, the first solenoid valve is opened to allow the upper clear liquid to pass through the pipeline through the drying structure, the drying structure and the reaction structure in turn for acid production;

[0020] S4: Finally, repeat the above steps to perform continuous operation.

[0021] The beneficial effects of the present invention are as follows:

[0022] 1. The present invention is provided with a mixing component. When acid production is required, the desulfurization waste liquid is first discharged into the mixing box through the liquid inlet pipe, and additives can be added therein to mix with the desulfurization waste liquid, and then the motor is started. The start of the motor drives the rotation of the rotating shaft, the rotation of the rotating shaft drives the rotation of the second gear, the rotation of the second gear drives the rotation of the first gear, the rotation of the first gear drives the rotation of the mixing shaft, and the rotation of the mixing shaft drives the rotation of the filter frame to mix the desulfurization waste liquid. After mixing, the motor is turned off to allow the suspended matter in the desulfurization waste liquid to gradually sink to the bottom of the liquid and be physically separated from the upper clear liquid. After separation, the first solenoid valve is opened to discharge the upper clear liquid through the pipeline to the next process, thereby reducing impurities contained in the waste liquid, thereby improving the processing efficiency of the overall process.

[0023] 2. The present invention uses the through holes opened on the inner wall of the mixing shaft. When mixing the desulfurized waste liquid, additives are added into the feeding pipe, and the additives enter the interior of the mixing shaft. During the rotation of the mixing shaft, the additives inside are discharged from the through holes, forming multiple mixing points in the desulfurized waste liquid, accelerating the mixing process of the waste liquid and the additives, thereby improving the overall processing efficiency.

[0024] 3. The present invention sets a liquid storage tank. After the desulfurization waste liquid in the mixing tank is mixed and settled, the upper clear liquid is first discharged, and then the second solenoid valve is started to discharge the settled suspended matter at the bottom from the liquid outlet pipe into the liquid storage tank. The upper clear liquid and the settled suspended matter are discharged separately, which optimizes the treatment process and facilitates continuous mixing in the mixing tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0026] Figure 2 It is a schematic diagram of the structural cross section of the mixing box of the present invention;

[0027] Figure 3 For the present invention Figure 2 A schematic diagram of the structure enlargement in the middle;

[0028] Figure 4 For the present invention Figure 2 A magnified schematic diagram of the structure at B in the middle;

[0029] Figure 5 It is a structural schematic diagram of the filter plate of the present invention;

[0030] Figure 6 It is a schematic diagram of the cross-section structure of the mixing shaft of the present invention;

[0031] Figure 7 It is a structural schematic diagram of the filter screen of the present invention.

[0032] In the figure: 1, mixing box; 2, cover plate; 3, pipeline; 4, first solenoid valve; 5, drying structure; 6, drying structure; 7, reaction structure; 8, mixing shaft; 9, first gear; 10, second gear; 11, rotating shaft; 12, motor; 13, liquid inlet pipe; 14, feeding pipe; 15, through hole; 16, fixing plate; 17, filter plate; 18, filter frame; 19, filter screen; 20, liquid outlet pipe; 21, second solenoid valve; 22, liquid storage tank; 23, bolt; 24, connecting block; 25, limit rod; 26, slide plate; 27, spring; 28, drain pipe. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] like Figures 1 to 7As shown, in an embodiment of the present invention, a coking desulfurization waste liquid acid-making device comprises a mixing box 1, a cover plate 2 is installed on the top of the mixing box 1 through bolts 23, a liquid inlet pipe 13 is fixedly installed on the top of the cover plate 2, a pipe 3 is fixedly connected to the side wall of the mixing box 1, a first solenoid valve 4 is installed on the outer wall of the pipe 3, a drying structure 5 is arranged at one end of the pipe 3 away from the mixing box 1, a drying structure 6 and a reaction structure 7 are arranged on one side of the drying structure 5, and a mixing assembly is arranged inside the mixing box 1;

[0035] The mixing assembly includes a mixing shaft 8 arranged inside the mixing box 1, the top end of the mixing shaft 8 is fixedly connected to a first gear 9, the first gear 9 is rotatably installed inside the cover plate 2, one side of the first gear 9 is meshingly connected to a second gear 10, the inner wall of the second gear 10 is fixedly installed with a rotating shaft 11, the top end of the rotating shaft 11 is fixedly connected to a motor 12, the outer wall of the mixing shaft 8 is fixedly installed with a fixing plate 16, the fixing plates 16 are evenly arranged in a circular array, and a filter frame 18 is installed on one side of each fixing plate 16.

[0036] By setting the mixing component, when acid production is required, the desulfurized waste liquid is first discharged into the mixing box 1 through the liquid inlet pipe 13, and additives can be added therein to mix with the desulfurized waste liquid, and then the motor 12 is started. The start of the motor 12 drives the rotation of the rotating shaft 11, and the rotation of the rotating shaft 11 drives the rotation of the second gear 10, and the rotation of the second gear 10 drives the rotation of the first gear 9. The rotation of the first gear 9 drives the rotation of the mixing shaft 8, and the rotation of the mixing shaft 8 drives the rotation of the filter frame 18 to mix the desulfurized waste liquid. After mixing, the motor 12 is turned off to make the suspended matter in the desulfurized waste liquid gradually sink to the bottom of the liquid and be physically separated from the upper clear liquid. After separation, the first solenoid valve 4 is opened to discharge the upper clear liquid through the pipeline 3 to the next process, thereby reducing the impurities contained in the waste liquid, thereby improving the processing efficiency of the overall process;

[0037] There are two groups of mixing components, which are symmetrically arranged. After one group of mixing components is working, while the internal desulfurization waste liquid is settling, the other group of mixing components is working, and the two groups work alternately, further improving the working efficiency of the equipment;

[0038] Existing: CN212450713U discloses a sulfuric acid production device from coking desulfurization waste liquid. This patent discloses the drying box 3, oven 5 and reactor 6 proposed in the present application document. The drying structure 5, drying structure 6 and reaction structure 7 in the present application document all adopt the same technical means in the prior art, and this technical means will not be repeated here one by one.

[0039] like Figures 1 to 6 As shown, a feeding pipe 14 is fixedly connected to the top of the mixing shaft 8 , and the feeding pipe 14 is rotatably installed inside the cover plate 2 . Through holes 15 are evenly opened on the inner wall of the mixing shaft 8 .

[0040] The interior of the mixing shaft 8 is hollow;

[0041] When the desulfurized waste liquid is mixed, additives are added into the feeding pipe 14, and the additives enter the interior of the mixing shaft 8, so that the additives inside the mixing shaft 8 are discharged from the through hole 15 during the rotation of the mixing shaft 8, forming multiple mixing points in the desulfurized waste liquid, accelerating the mixing process of the waste liquid and the additive, thereby improving the overall processing efficiency.

[0042] like Figure 5 and Figure 6 As shown, a filter plate 17 is fixedly installed inside the filter frame 18 .

[0043] When the mixing shaft 8 rotates, the filter plate 17 is driven to rotate. The rotation of the filter plate 17 itself also stirs the desulfurized waste liquid to a certain extent, so as to promote the collision and aggregation of suspended matter and impurity particles in the waste liquid, thereby accelerating the sedimentation process.

[0044] When the filter plate 17 is rotating, it can filter the waste liquid, which helps to reduce the impurity content in the desulfurization waste liquid, thereby improving the efficiency and stability of the pretreatment process.

[0045] like Figure 6 As shown, the filter frame 18 is slidably connected to the fixing plate 16 .

[0046] The top of the filter frame 18 is slidably fitted with the bottom of the cover plate 2 to limit the position of the filter frame 18 during mixing;

[0047] When the filter plate 17 needs to be maintained, the cover plate 2 is opened by the bolts 23, the filter frame 18 is pulled upward, and is directly slid out from the inside of the fixing plate 16 for maintenance.

[0048] like Figure 4 and Figure 7 As shown, a filter screen 19 is provided at one end of the pipeline 3 , and the filter screen 19 is installed inside the mixing box 1 .

[0049] When the upper clear liquid is discharged after the desulfurized waste liquid settles, the upper clear liquid is filtered again through the filter screen 19 and then discharged, so as to further reduce the impurity content in the waste liquid.

[0050] like Figure 4 and Figure 7 As shown, a connection block 24 is fixedly connected to the top of the filter screen 19 , and the connection block 24 is slidably mounted on the inner wall of the mixing box 1 .

[0051] like Figure 2 and Figure 4As shown, a liquid outlet pipe 20 is arranged below the mixing shaft 8, and the liquid outlet pipe 20 is fixedly connected to the mixing box 1. A second solenoid valve 21 is installed on the outer wall of the liquid outlet pipe 20. The second solenoid valve 21 is arranged inside a liquid storage tank 22. The liquid storage tank 22 is fixedly installed at the bottom end of the mixing box 1, and a drain pipe 28 is installed on the side wall of the liquid storage tank 22.

[0052] After the desulfurization waste liquid in the mixing box 1 is mixed and settled, the upper clear liquid is first discharged, and then the second solenoid valve 21 is activated to discharge the settled suspended matter at the bottom from the liquid outlet pipe 20 into the liquid storage tank 22. The upper clear liquid and the settled suspended matter are discharged separately, which optimizes the treatment process and facilitates continuous mixing in the mixing box 1.

[0053] like Figure 3 , Figure 4 and Figure 7 As shown, a limiting rod 25 is embedded in the connection block 24 , a slide plate 26 is fixedly mounted on the top of the limiting rod 25 , and the slide plate 26 is arranged at the bottom end of the bolt 23 .

[0054] When the device is working, the slide plate 26 is limited by the bottom end of the bolt 23 so that the limiting rod 25 is embedded in the interior of the connecting block 24, so that the filter screen 19 is stably installed in the mixing box 1.

[0055] like Figures 1 to 7 As shown, the slide plate 26 is slidably mounted on the inner wall of the mixing box 1 , and a spring 27 is provided at the bottom end of the slide plate 26 .

[0056] When the mixing box 1 is maintained, the bolt 23 is removed, and the spring 27 releases the elastic potential energy to drive the slide plate 26 to move upward, and the slide plate 26 drives the limit rod 25 to move upward, and the limit rod 25 slides out of the connection block 24 to release the limit on the connection block 24, and the filter screen 19 can be taken out of the mixing box 1 for maintenance;

[0057] After maintenance, first embed the connecting block 24 into the mixing box 1, then place the cover plate 2 on the top of the mixing box 1, install the bolts 23, and the bolts 23 contact the slide plate 26 to drive the slide plate 26 to move downward, so that the limiting rod 25 is embedded in the connecting block 24 to limit it.

[0058] A method for preparing a coking desulfurization waste liquid acid-making device comprises the following steps:

[0059] S1: First, the desulfurized waste liquid is discharged into the mixing box 1 through the liquid inlet pipe 13, and then the motor 12 is started. The start of the motor 12 drives the rotation of the rotating shaft 11, and the rotation of the rotating shaft 11 drives the rotation of the second gear 10. The rotation of the second gear 10 drives the rotation of the first gear 9. The rotation of the first gear 9 drives the rotation of the mixing shaft 8. The rotation of the mixing shaft 8 drives the rotation of the fixed plate 16. The rotation of the fixed plate 16 drives the rotation of the filter frame 18. The rotation of the filter frame 18 drives the rotation of the filter plate 17 to stir the desulfurized waste liquid;

[0060] S2: Then the additive is put into the feeding pipe 14, and the additive enters the interior of the mixing shaft 8. During the rotation of the mixing shaft 8, the additive inside is discharged from the through hole 15, forming multiple mixing points in the desulfurized waste liquid;

[0061] S3: After mixing, the motor 12 is turned off to allow the suspended matter in the desulfurized waste liquid to gradually sink to the bottom of the liquid and be physically separated from the upper clear liquid. After separation, the first solenoid valve 4 is opened to allow the upper clear liquid to pass through the pipeline 3 and sequentially pass through the drying structure 5, the drying structure 6 and the reaction structure 7 for acid production;

[0062] S4: Finally, repeat the above steps to perform continuous operation.

[0063] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A coking desulfurization waste liquid acid production equipment, comprising a mixing box (1), characterized in that: The top of the mixing box (1) is mounted with a cover plate (2) by means of bolts (23); the top of the cover plate (2) is fixedly mounted with a liquid inlet pipe (13); the side wall of the mixing box (1) is fixedly connected with a pipeline (3); the outer wall of the pipeline (3) is mounted with a first solenoid valve (4); a drying structure (5) is arranged at one end of the pipeline (3) away from the mixing box (1); a drying structure (6) and a reaction structure (7) are arranged on one side of the drying structure (5); and a mixing assembly is arranged inside the mixing box (1); The mixing assembly comprises a mixing shaft (8) arranged inside a mixing box (1), the top end of the mixing shaft (8) being fixedly connected to a first gear (9), the first gear (9) being rotatably mounted inside a cover plate (2), one side of the first gear (9) being meshingly connected to a second gear (10), the inner wall of the second gear (10) being fixedly mounted to a rotating shaft (11), the top end of the rotating shaft (11) being fixedly connected to a motor (12), the outer wall of the mixing shaft (8) being fixedly mounted to a fixing plate (16), the fixing plates (16) being evenly arranged in a ring array, and one side of each fixing plate (16) being mounted with a filter frame (18).

2. The coking desulfurization waste liquid acid production equipment according to claim 1, characterized in that: The top end of the mixing shaft (8) is fixedly connected with a feeding pipe (14), and the feeding pipe (14) is rotatably mounted inside the cover plate (2). The inner wall of the mixing shaft (8) is evenly provided with through holes (15).

3. The acid-making equipment for coking desulfurization waste liquid according to claim 2, characterized in that: A filter plate (17) is fixedly installed inside the filter frame (18).

4. The acid-making equipment for coking desulfurization waste liquid according to claim 2, characterized in that: The filter frame (18) is slidably connected to the fixing plate (16).

5. The coking desulfurization waste liquid acid production equipment according to claim 1, characterized in that: A filter screen (19) is provided at one end of the pipeline (3), and the filter screen (19) is installed inside the mixing box (1).

6. The acid-making equipment for coking desulfurization waste liquid according to claim 5, characterized in that: The top end of the filter screen (19) is fixedly connected to a connection block (24), and the connection block (24) is slidably mounted on the inner wall of the mixing box (1).

7. The acid-making equipment for coking desulfurization waste liquid according to claim 1, characterized in that: A liquid outlet pipe (20) is arranged below the mixing shaft (8), the liquid outlet pipe (20) is fixedly connected to the mixing box (1), a second solenoid valve (21) is installed on the outer wall of the liquid outlet pipe (20), the second solenoid valve (21) is arranged inside a liquid storage box (22), the liquid storage box (22) is fixedly installed at the bottom end of the mixing box (1), and a liquid discharge pipe (28) is installed on the side wall of the liquid storage box (22).

8. The acid-making equipment for coking desulfurization waste liquid according to claim 6, characterized in that: A limiting rod (25) is embedded in the interior of the connection block (24), a slide plate (26) is fixedly mounted on the top end of the limiting rod (25), and the slide plate (26) is arranged at the bottom end of the bolt (23).

9. The acid-making equipment for coking desulfurization waste liquid according to claim 8, characterized in that: The slide plate (26) is slidably mounted on the inner wall of the mixing box (1), and a spring (27) is provided at the bottom end of the slide plate (26).

10. A method for preparing an acid-making device using wastewater from coking desulfurization, which is applicable to the acid-making device using wastewater from coking desulfurization as claimed in claims 1 to 9, characterized in that: The following steps are involved: S1: First, the desulfurized waste liquid is discharged into the mixing box (1) through the liquid inlet pipe (13), and then the motor (12) is started. The starting of the motor (12) drives the rotation of the rotating shaft (11), and the rotation of the rotating shaft (11) drives the rotation of the second gear (10). The rotation of the second gear (10) drives the rotation of the first gear (9). The rotation of the first gear (9) drives the rotation of the mixing shaft (8). The rotation of the mixing shaft (8) drives the rotation of the fixed plate (16). The rotation of the fixed plate (16) drives the rotation of the filter frame (18). The rotation of the filter frame (18) drives the rotation of the filter plate (17), thereby stirring the desulfurized waste liquid; S2: Additives are then added into the feeding pipe (14), and the additives enter the interior of the mixing shaft (8). During the rotation of the mixing shaft (8), the additives inside are discharged from the through hole (15), forming multiple mixing points in the desulfurized waste liquid; S3: After mixing, the motor (12) is turned off to allow the suspended matter in the desulfurized waste liquid to gradually sink to the bottom of the liquid and be physically separated from the upper clear liquid. After separation, the first solenoid valve (4) is opened to allow the upper clear liquid to pass through the pipeline (3) and sequentially pass through the drying structure (5), the drying structure (6) and the reaction structure (7) for acid production; S4: Finally, repeat the above steps to perform continuous operation.

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