A device for separating sodium bicarbonate and mother liquor in the production process of soda ash

Abstract

The present invention discloses a device for separating sodium bicarbonate from mother liquor in a soda ash production process, and relates to the technical field of separation devices. The device comprises a tower body, wherein a first feed pipe and a second feed pipe are respectively provided on the upper portion of the tower body from left to right, a reaction chamber is provided in the tower body, a separation chamber is provided at the bottom of the reaction chamber, a discharge pipe is provided at the upper portion of the separation chamber, a group of floats are provided at the bottom of a bucket-shaped screen, the bottom of one end of the discharge pipe is close to the upper edge of the bucket-shaped screen, a guide pipe is provided at the bottom of the guide pipe, a group of connecting pipes are provided at the bottom of the connecting pipe, a discharge pipe is provided at the bottom of the connecting pipe, the discharge pipe passes through the bottom of the tower body, the guide pipe and the connecting pipe are connected by a rotary joint, the connecting pipes are connected by a rotary joint, and the connecting pipe and the discharge pipe are connected by a rotary joint. The present invention solves the technical problems of existing equipment for separating sodium bicarbonate crystals from ammonium chloride mother liquor, such as the large number of equipment, high investment, high maintenance cost, high power consumption, and cumbersome operation.

Description

Technical Field

[0001] The invention belongs to the technical field of separation devices, and in particular relates to a device for separating sodium bicarbonate and mother liquor in a soda ash production process. Background Art

[0002] During the soda ash production process, ammonium bicarbonate solution reacts with sodium chloride to produce sodium bicarbonate crystals and an ammonium chloride mother liquor. The sodium bicarbonate crystals separated from the ammonium chloride mother liquor are called heavy alkali. The heavy alkali undergoes a thermal decomposition reaction to produce sodium carbonate and carbon dioxide, which is then converted into soda ash. Existing methods for separating sodium bicarbonate from ammonium chloride mother liquor primarily rely on a feed pump to extract the sodium bicarbonate and mother liquor mixture from a reaction unit onto a conveyor filter belt. The mother liquor is separated from the filter pores of the filter belt, while the sodium bicarbonate crystals remain on the filter belt and fall to the end due to gravity. However, due to the large production volume of soda ash, the reaction equipment is often oversized, requiring high-power feed pumps. The conveyor filter belt also requires a high-power motor to drive it, requiring continuous operation year-round, resulting in significant power consumption. Furthermore, multiple devices are required to separate the sodium bicarbonate crystals from the ammonium chloride mother liquor, resulting in high investment and maintenance costs. Summary of the Invention

[0003] Purpose of the invention: The purpose of the present invention is to provide a device for separating sodium bicarbonate and mother liquor in the soda ash production process, which can achieve the separation of sodium bicarbonate crystals and ammonium chloride mother liquor only in the reaction equipment, without the need for external filtering equipment, no electricity consumption, and realize power-free separation.

[0004] A device for separating sodium bicarbonate from mother liquor in a soda ash production process comprises a tower body, wherein a first feed pipe and a second feed pipe are respectively provided on the upper portion of the tower body from left to right, and a reaction chamber is provided in the tower body. Ammonium bicarbonate enters the reaction chamber through the first feed pipe, and sodium chloride enters the reaction chamber through the second feed pipe. The ammonium bicarbonate and the sodium chloride react in the reaction chamber.

[0005] The invention is characterized in that: a separation chamber is provided at the bottom of the reaction chamber, a discharge pipe is provided at the upper part of the separation chamber, the discharge pipe is connected with the reaction chamber, an electric valve is provided on the discharge pipe, and a group of discharge pipes are provided on the discharge pipe. The sodium bicarbonate crystals and ammonium chloride mother liquor mixture produced after the reaction in the reaction chamber enter the discharge pipe by opening the electric valve, and then discharged from the bottom of the discharge pipe, so that the mixed liquid can fall more evenly on the bucket-shaped screen, a bucket-shaped screen is provided at the lower side of the discharge pipe, a group of floats is provided at the bottom of the bucket-shaped screen, and the bottom of one end of the discharge pipe is close to the upper edge of the bucket-shaped screen, so that the sodium bicarbonate crystals falling on the bucket-shaped screen can fall from the top to the bottom with a larger distance, so that the sodium bicarbonate crystals and the ammonium chloride mother liquor can be discharged from the bottom of the bucket-shaped screen. The ammonium chloride mother liquor is separated more thoroughly, the mixed liquor falls on the bucket-shaped screen, the sodium bicarbonate crystals remain on the screen, and the ammonium chloride mother liquor passes through the bucket-shaped screen and falls into the bottom of the separation chamber. A guide pipe is provided at the bottom of the bucket-shaped screen, a group of connecting pipes are provided at the bottom of the guide pipe, a discharge pipe is provided at the bottom of the connecting pipe, and the discharge pipe runs through the bottom of the tower body. As the ammonium chloride mother liquor in the separation chamber gradually increases and rises, the float drives the bucket-shaped screen to gradually rise under the action of buoyancy, and the bucket-shaped screen is always above the liquid surface. The guide pipe and the connecting pipe also gradually rise, and the connecting pipe gradually becomes vertical to the horizontal plane, and the sodium bicarbonate crystals separated on the bucket-shaped screen fall to the bottom of the bucket-shaped screen, enter the connecting pipe through the guide pipe, and are discharged through the discharge pipe.

[0006] Furthermore, the material guide pipe is connected to the connecting pipe via a rotary joint, the connecting pipes are connected to each other via a rotary joint, and the connecting pipe is connected to the discharge pipe via a rotary joint, so that the connecting pipes can rotate flexibly.

[0007] Furthermore, a guide rod is provided in the separation chamber, a sliding sleeve is provided at the rear of the guide tube, a sliding hole is provided on the bucket-shaped screen, and the guide rod passes through the sliding sleeve and the sliding hole, and slides up and down on the guide rod through the sliding sleeve and the sliding hole, so that the moving trajectory of the bucket-shaped screen is limited to prevent deviation.

[0008] Furthermore, the bucket-shaped screen and the connecting pipe are both provided with support rods, and when there is no mixed liquid in the separation chamber and the bucket-shaped screen is at the lowest position, it is supported by the support rods.

[0009] Furthermore, a motor is provided on the upper part of the tower body, a stirring rod is provided in the reaction chamber, a stirring blade is provided on the stirring rod, and the stirring rod is connected to the output shaft of the motor. The output shaft of the motor drives the stirring rod to rotate, and the stirring rod drives the stirring blade to rotate, thereby stirring the mixture of ammonium bicarbonate solution and sodium chloride to accelerate the reaction.

[0010] Furthermore, the bottom of the tower body is provided with supporting legs to support the tower body.

[0011] Furthermore, a drain pipe is provided on the right side of the separation chamber, and an electric valve is provided on the drain pipe. After the sodium bicarbonate crystals are separated, the ammonium chloride mother liquor in the separation chamber is discharged from the drain pipe by opening the electric valve.

[0012] Compared with the prior art, the present invention has the following advantages: sodium bicarbonate crystals and ammonium chloride mother liquor produced by the reaction in the reaction chamber fall on the bucket-shaped screen through the discharge pipe; through the design of the bucket-shaped screen, the sodium bicarbonate and ammonium chloride mixed liquid first passes through the filter to separate the ammonium chloride mother liquor, and then the sodium bicarbonate crystals fall to the bottom along the high point of the bucket-shaped screen and enter the guide pipe; at this time, the ammonium chloride mother liquor separated by passing through the bucket-shaped filter gradually increases and rises at the bottom of the separation chamber and contacts the float, so that the float drives the bucket-shaped screen upward, so that the connecting pipe gradually rotates to be perpendicular to the horizontal plane, so that the sodium bicarbonate crystals can smoothly pass through the guide pipe and the connecting pipe, and finally be discharged through the discharge pipe; the discharged sodium bicarbonate and ammonium chloride mixed liquid is utilized to achieve the separation of the sodium bicarbonate and ammonium chloride mixed liquid, and the separated ammonium chloride mixed liquid gradually rises so that the sodium bicarbonate crystals on the bucket-shaped filter can be smoothly discharged through the guide pipe, the connecting pipe and the discharge pipe, thereby achieving discharge after separation.

[0013] The gradually rising liquid level of the ammonium chloride mother liquor causes the connecting pipe and the bucket-shaped screen pipe to gradually rise, so that when the sodium bicarbonate and ammonium chloride mixed liquor just falls, the height of the mixed liquor discharged from the branch pipe and the initial bucket-shaped screen at the bottom form a constantly changing height difference. The greater the height distance between the bottom of the branch pipe and the bucket-shaped screen, the wider the splashing range of the mixed liquor falling on the bucket-shaped screen, and the larger the area covered by the bucket-shaped screen, which is more conducive to the rapid separation of sodium bicarbonate and ammonium chloride. As the liquid level gradually rises, the bucket screen gradually approaches the bottom of the branch pipe, avoiding the branch pipe being directly above the bucket-shaped screen during discharge, so that the sodium bicarbonate and ammonium chloride mother liquor are discharged through the connecting pipe and the discharge pipe under the action of gravity before they have time to be fully separated under the action of gravity. The present invention does not require an external separation device, and all separation is completed within the tower body, without power consumption, thereby realizing the powerless separation of sodium bicarbonate from the ammonium chloride mother liquor. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 The structure of the present invention Figure 1 ;

[0015] Figure 2 The structure of the present invention Figure 2 ;

[0016] Figure 3 It is an appearance diagram of the present invention;

[0017] Figure 4 is a side view of the bucket screen of the present invention;

[0018] Figure 5 This is a bottom view of the discharge pipe of the present invention;

[0019] Figure 6 It is a bottom view of the bucket-shaped screen of the present invention.

[0020] Figures: 1 tower body, 2 feed pipe 1, 3 feed pipe 2, 4 reaction chamber, 5 separation chamber, 6 discharge pipe, 7 electric valve 1, 8 discharge pipe, 9 bucket screen, 10 float, 11 guide pipe, 12 connecting pipe, 13 discharge pipe, 14 rotary joint, 15 guide rod, 16 sliding sleeve, 17 sliding hole, 18 support rod, 19 motor, 20 stirring rod, 21 stirring blade, 22 support leg, 23 discharge pipe, 24 electric valve 2. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0022] In the description of the invention, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," "the other end," and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limitations on the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0023] Example

[0024] like Figure 1-6 As shown:

[0025] A device for separating sodium bicarbonate from mother liquor in a soda ash production process comprises a tower body 1, wherein a feed pipe 1 and a feed pipe 2 3 are respectively provided on the upper portion of the tower body 1 from left to right, and a reaction chamber 4 is provided in the tower body 1;

[0026] It is characterized in that: a separation chamber 5 is provided at the bottom of the reaction chamber 4, a discharge pipe 6 is provided on the upper part of the separation chamber 5, the discharge pipe 6 is connected with the reaction chamber 4, an electric valve 7 is provided on the discharge pipe 6, a group of discharge pipes 8 are provided on the discharge pipe 6, a bucket-shaped screen 9 is provided at the lower side of the discharge pipe 6, a group of floats 10 are provided at the bottom of the bucket-shaped screen 9, the bottom of one end of the discharge pipe 8 is close to the edge just above the bucket-shaped screen 9, a guide pipe 11 is provided at the bottom of the guide pipe 11, a group of connecting pipes 12 are provided at the bottom of the connecting pipe 12, a discharge pipe 13 is provided at the bottom of the discharge pipe 13, and the discharge pipe 13 passes through the bottom of the tower body 1.

[0027] Furthermore, the guide pipe 11 and the connecting pipe 12 are connected via a rotary joint 14 , the connecting pipes 12 and the connecting pipes 12 are connected via a rotary joint 14 , and the connecting pipe 12 and the discharge pipe 13 are connected via a rotary joint 14 .

[0028] Furthermore, a guide rod 15 is provided in the separation chamber 5 , a sliding sleeve 16 is provided at the rear of the guide tube 11 , a sliding hole 17 is provided on the bucket-shaped screen 9 , and the guide rod 15 passes through the sliding sleeve 16 and the sliding hole 17 .

[0029] Furthermore, support rods 18 are provided on the bucket-shaped screen 9 and the connecting pipe 12 .

[0030] Furthermore, a motor 19 is provided on the upper portion of the tower body 1 , a stirring rod 20 is provided in the reaction chamber 4 , a stirring blade 21 is provided on the stirring rod 20 , and the stirring rod 20 is connected to the output shaft of the motor 19 .

[0031] Furthermore, the bottom of the tower body 1 is provided with supporting legs 22 .

[0032] Furthermore, a drain pipe 23 is provided on the right side of the separation chamber 5 , and an electric valve 24 is provided on the drain pipe 23 .

[0033] The method of use of the present invention is as follows:

[0034] The ammonium bicarbonate solution enters the reaction chamber 4 through the feed pipe 1 2, and the sodium chloride enters the reaction chamber 4 through the feed pipe 2 3. The motor 19 is started, and the output shaft of the motor 19 drives the stirring rod 20 to rotate. The stirring rod 20 drives the stirring blade 21 to rotate, stirring the ammonium bicarbonate solution and the sodium chloride to react, so that a mixture of sodium bicarbonate crystals and ammonium chloride mother liquor is generated.

[0035] Open the electric valve 1 7, the mixed liquid enters the discharge pipe 6, then enters each branch pipe 8, and then falls onto the bucket screen 9 through the bottom of the branch pipe 8. The ammonium chloride mother liquor in the mixed liquid passes through the bucket screen 9 and enters the bottom of the separation chamber 5. As the ammonium chloride mother liquor in the separation chamber 5 gradually increases and rises, it contacts the bottom of the buoy 10, causing the buoy 10 to float. The buoy 10 drives the bucket screen 9 to move upward. At the same time, the sliding hole 17 and the sliding sleeve 16 slide on the guide rod 15, and the guide pipe 11 also rises. The connecting pipe 12 rotates due to the rotation of the rotary joint 14, gradually rises and gradually becomes vertical to the horizontal plane. The separated sodium bicarbonate crystals on the bucket screen 9 fall along the slope under the action of gravity, enter the bottom of the bucket screen 9, enter the guide pipe 11, and then enter the connecting pipe 12, and are discharged through the discharge pipe 13. Then open the electric valve 2 24, and the ammonium chloride mother liquor in the separation chamber 5 is discharged through the discharge pipe 23.

[0036] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements can be made without departing from the principles of the present invention. These improvements should also be regarded as the scope of protection of the present invention.

Claims

1. A device for separating sodium bicarbonate from mother liquor in a soda ash production process, comprising a tower body (1), wherein a first feed pipe (2) and a second feed pipe (3) are respectively provided on the upper portion of the tower body (1) from left to right, and a reaction chamber (4) is provided in the tower body (1); Its characteristics are: The reaction chamber (4) is provided with a separation chamber (5) at the bottom, the separation chamber (5) is provided with a discharge pipe (6) at the top, the discharge pipe (6) is connected with the reaction chamber (4), the discharge pipe (6) is provided with an electric valve (7), the discharge pipe (6) is provided with a group of discharge pipes (8), the lower side of the discharge pipe (6) is provided with a bucket-shaped screen (9), the bottom of the bucket-shaped screen (9) is provided with a group of floats (10), the bottom of one end of the discharge pipe (8) is close to the upper edge of the bucket-shaped screen (9), the bottom of the bucket-shaped screen (9) is provided with a guide pipe (11), the bottom of the guide pipe (11) is provided with a group of connecting pipes (12), the bottom of the connecting pipe (12) is provided with a discharge pipe (13), and the discharge pipe (13) passes through the bottom of the tower body (1); The guide pipe (11) and the connecting pipe (12) are connected via a rotary joint (14), the connecting pipes (12) and the connecting pipes (12) are connected via a rotary joint (14), and the connecting pipe (12) and the discharge pipe (13) are connected via a rotary joint (14); A guide rod (15) is provided in the separation chamber (5), a sliding sleeve (16) is provided at the rear of the guide tube (11), a sliding hole (17) is provided on the bucket-shaped screen (9), and the guide rod (15) passes through the sliding sleeve (16) and the sliding hole (17).

2. The device for separating sodium bicarbonate from mother liquor in a soda ash production process according to claim 1, wherein: The bucket-shaped screen (9) and the connecting pipe (12) are both provided with support rods (18).

3. The device for separating sodium bicarbonate from mother liquor in a soda ash production process according to claim 1, wherein: A motor (19) is provided on the upper portion of the tower body (1), a stirring rod (20) is provided in the reaction chamber (4), a stirring blade (21) is provided on the stirring rod (20), and the stirring rod (20) is connected to the output shaft of the motor (19).

4. The device for separating sodium bicarbonate from mother liquor in a soda ash production process according to claim 1, wherein: The bottom of the tower body (1) is provided with supporting legs (22).

5. The device for separating sodium bicarbonate from mother liquor in a soda ash production process according to claim 1, wherein: A liquid discharge pipe (23) is provided on the right side of the separation chamber (5), and a second electric valve (24) is provided on the liquid discharge pipe (23).

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