Carbonizing tower convenient for controlling tower temperature and sodium carbonate concentration

Abstract

The utility model relates to the technical field of sodium bicarbonate production, and discloses a carbonization tower convenient to control tower temperature and sodium carbonate concentration, which comprises a carbonization tower tank body and a pretreatment tank, a cooling water jacket is arranged on the carbonization tower tank body, a cooling water inlet is arranged at one end of the cooling water jacket, a second flow control valve is arranged on the cooling water inlet, and a second flow control valve is arranged on the second flow control valve. And a cooling water outlet is formed in the other end of the cooling water jacket. According to the sodium carbonate pretreatment device, sodium bicarbonate is added into the pretreatment tank through the metering belt, desalted water is quantitatively added into the pretreatment tank by adjusting the flow through the control valve on the water control port, and the mixing speed of a solution in the pretreatment tank is accelerated by matching the rotation of the stirring rod with the heating element, so that a sodium carbonate solution with specified concentration is formed; a pretreatment agent is added through the aid supplementing port, and a solution in the pretreatment tank is filtered through the filter, so that the effect of controlling the concentration of sodium carbonate is achieved, and the alkalinity of sodium bicarbonate in the carbonization process is controlled.

Description

Technical Field

[0001] The utility model relates to the technical field of sodium bicarbonate production, in particular to a carbonization tower which is convenient for controlling tower temperature and sodium carbonate concentration. Background Art

[0002] The carbonization tower is the core equipment of the carbonization process in the production of sodium bicarbonate. It is mainly used to produce sodium bicarbonate by absorbing carbon dioxide. The carbonization tower is usually about 10 to 20 meters high, and its internal structure is exquisitely designed to meet the needs of complex process such as absorption, crystallization, and cooling.

[0003] In the traditional carbonization tower, it is difficult to control the concentration of the sodium carbonate solution when preparing sodium bicarbonate, and the temperature of the carbonization tower also affects the crystallization effect of sodium bicarbonate. Therefore, the utility model proposes a carbonization tower that is easy to control the tower temperature and the sodium carbonate concentration to solve the problems existing in the prior art. Utility Model Content

[0004] The utility model aims to solve the shortcomings in the prior art and proposes a carbonization tower which is convenient for controlling the tower temperature and the sodium carbonate concentration.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a carbonization tower which is convenient for controlling tower temperature and sodium carbonate concentration, comprising a carbonization tower tank body and a pretreatment tank, wherein a cooling water jacket is provided on the carbonization tower tank body, a cooling water inlet is provided at one end of the cooling water jacket, a second flow control valve is provided on the cooling water inlet, a cooling water outlet is provided on the other end of the cooling water jacket, a steam heating jacket is provided on the carbonization tower tank body, a steam inlet is provided at one end of the steam heating jacket, a first flow control valve is provided on the steam inlet, a steam outlet is provided on the other end of the steam heating jacket, a temperature sensor is provided on the carbonization tower tank body, one end of the temperature sensor is located in the carbonization tower tank body, a drainage tower plate is provided in the carbonization tower tank body, a kiln gas inlet pipe is provided on one side of the carbonization tower tank body, an exhaust gas discharge pipe is provided above the carbonization tower tank body, a cooling water outlet is provided on one side of the carbonization tower tank body, a liquid adding pipe is provided above the carbonization tower tank body, a pump body is provided on the liquid adding pipe, and a slurry circulation pipeline is provided below the carbonization tower tank body.

[0006] As a further description of the above technical solution:

[0007] A driving motor is fixedly connected to the pretreatment tank, a stirring rod is fixedly connected to the output end of the driving motor, a raw material inlet is provided on the pretreatment tank, an additive supplement port is provided on the pretreatment tank, a water control port is provided on the pretreatment tank, one side of the pretreatment tank is fixedly connected to a liquid adding pipe, a filter is provided at one end of the liquid adding pipe close to the pretreatment tank, a heating element is provided at the bottom of the pretreatment tank, and a metering belt is provided above one side of the raw material inlet.

[0008] As a further description of the above technical solution:

[0009] One end of the exhaust gas discharge pipe is fixedly connected to an exhaust gas circulation treatment device, one end of the kiln gas inlet pipe is fixedly connected to a kiln gas storage device, and one end of the crystal slurry circulation pipeline is fixedly connected to a thickening device.

[0010] As a further description of the above technical solution:

[0011] The cooling water jacket is arranged around the outer wall of the carbonization tower body, the steam heating jacket is arranged around the inner wall of the carbonization tower body, the cooling water inlet is arranged on one side of the bottom of the carbonization tower body, the steam outlet is arranged on one side of the bottom of the carbonization tower body, the cooling water outlet is located on one side of the top of the carbonization tower body, the steam inlet is located on one side of the top of the carbonization tower body, the steam outlet is located on one side of the bottom of the carbonization tower body, and the temperature sensor is arranged at the middle position of the carbonization tower body.

[0012] As a further description of the above technical solution:

[0013] Several groups of diversion tower plates are provided, and each group of diversion tower plates is arranged adjacent to each other with the head and tail inclined. The kiln gas inlet pipe is located below one side of the carbonization tower body, the exhaust gas discharge pipe is located at the top of the carbonization tower body, the liquid adding pipe is arranged at the top of the carbonization tower body, the output end of the liquid adding pipe is located above the high place of the diversion tower plate, and the crystal slurry circulation pipeline is located at the bottom of the carbonization tower body.

[0014] As a further description of the above technical solution:

[0015] Both the raw material inlet and the additive supplement port are arranged at the top of the pretreatment tank, a control valve is provided on the water control port, and one end of the liquid adding pipe is located below one side of the pretreatment tank.

[0016] As a further description of the above technical solution:

[0017] The exhaust gas circulation treatment device is located above the kiln gas storage device, and a gas flux control valve is provided on the kiln gas inlet pipe.

[0018] The utility model has the following beneficial effects:

[0019] 1. In the present utility model, heavy soda ash is added into the pretreatment tank through a metering belt, and demineralized water is quantitatively added into the pretreatment tank by adjusting the flow rate through a control valve on the water control port. The stirring rod rotates in cooperation with a heating element to accelerate the mixing speed of the solution in the pretreatment tank, forming a sodium carbonate solution with a specified concentration. A pretreatment agent is added through the additive supplement port, and the solution in the pretreatment tank is filtered through a filter, achieving the effect of controllable sodium carbonate concentration, thereby controlling the alkalinity of sodium bicarbonate in the carbonization process.

[0020] 2. In the present utility model, the gas flux control valve on the kiln gas inlet pipe adjusts the flow rate of kiln gas in the carbonization tower tank body, controls the rate and heat release of the carbonization reaction, thereby indirectly affecting the tower temperature. The cooling water jacket and the second flow control valve are used to control the cooling of the furnace wall. The steam heating jacket and the first flow control valve are used to control the steam flow for temperature increase control. The temperature in the furnace is monitored through a temperature sensor, and the cooling water jacket and the steam heating jacket are coordinated to keep the tower temperature constant within the required range. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 FIG. is an overall working schematic diagram of a carbonization tower that is convenient for controlling the tower temperature and sodium carbonate concentration proposed by the present utility model;

[0022] Figure 2 FIG. is a partial working schematic diagram of a carbonization tower that is convenient for controlling the tower temperature and sodium carbonate concentration proposed by the present utility model Figure 1 ;

[0023] Figure 3 FIG. is a partial working schematic diagram of a carbonization tower that is convenient for controlling the tower temperature and sodium carbonate concentration proposed by the present utility model Figure 2 ;

[0024] Figure 4 is Figure 3 an enlarged view of part A of

[0025] Figure 5 is Figure 3 an enlarged view of part B of

[0026] LEGEND DESCRIPTION:

[0027] 1. Carbonation tower tank body; 2. Pretreatment tank; 3. Cooling water jacket; 4. Steam heating jacket; 5. Drainage tray; 6. Kiln gas inlet pipe; 7. Exhaust gas discharge pipe; 8. Cooling water outlet; 9. Liquid adding pipe; 10. Pump body; 11. Crystal slurry circulation pipeline; 12. Thickening device; 13. Exhaust gas recycling and treatment device; 14. Kiln gas storage device; 15. Driving motor; 16. Raw material inlet; 17. Stirring rod; 18. Auxiliary agent supplement port; 19. Water control port; 20. Steam inlet; 21. Temperature sensor; 22. First flow control valve; 23. Cooling water inlet; 24. Second flow control valve; 25. Steam outlet; 26. Filter; 27. Heating element; 28. Metering belt. Detailed implementation manners

[0028] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a 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 those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0029] Referring to Figures 1 - 5 , an embodiment provided by the present invention: A carbonation tower facilitating the control of tower temperature and sodium carbonate concentration, comprising a carbonation tower tank body 1 and a pretreatment tank 2. A cooling water jacket 3 is provided on the carbonation tower tank body 1. One end of the cooling water jacket 3 is provided with a cooling water inlet 23, and a second flow control valve 24 is provided on the cooling water inlet 23. The other end of the cooling water jacket 3 is provided with a cooling water outlet 8. A steam heating jacket 4 is provided on the carbonation tower tank body 1. One end of the steam heating jacket 4 is provided with a steam inlet 20, and a first flow control valve 22 is provided on the steam inlet 20. The other end of the steam heating jacket 4 is provided with a steam outlet 25. A temperature sensor 21 is provided on the carbonation tower tank body 1. One end of the temperature sensor 21 is located inside the carbonation tower tank body 1. A drainage tray 5 is provided inside the carbonation tower tank body 1. A kiln gas inlet pipe 6 is provided on one side of the carbonation tower tank body 1. An exhaust gas discharge pipe 7 is provided above the carbonation tower tank body 1. A cooling water outlet 8 is provided on one side of the carbonation tower tank body 1. A liquid adding pipe 9 is provided above the carbonation tower tank body 1. A pump body 10 is provided on the liquid adding pipe 9. A crystal slurry circulation pipeline 11 is provided below the carbonation tower tank body 1.

[0030] A driving motor 15 is fixedly connected to the pretreatment tank 2. A stirring rod 17 is fixedly connected to the output end of the driving motor 15. A raw material inlet 16 is provided on the pretreatment tank 2. An auxiliary agent supplement port 18 is provided on the pretreatment tank 2. A water control port 19 is provided on the pretreatment tank 2. One side of the pretreatment tank 2 is fixedly connected to a liquid adding pipe 9. A filter 26 is provided at one end of the liquid adding pipe 9 close to the pretreatment tank 2. A heating element 27 is provided at the bottom of the pretreatment tank 2. A metering belt 28 is provided above one side of the raw material inlet 16. One end of the waste gas discharge pipe 7 is fixedly connected to a waste gas recycling and treatment device 13. One end of the kiln gas inlet pipe 6 is fixedly connected to a kiln gas storage device 14. One end of the crystal slurry flow pipeline 11 is fixedly connected to a thickening device 12. A cooling water jacket 3 is arranged around the outer wall of the carbonization tower body 1. A steam heating jacket 4 is arranged around the inner wall of the carbonization tower body 1. A cooling water inlet 23 is arranged at one side of the bottom of the carbonization tower body 1. A steam outlet 25 is arranged at one side of the bottom of the carbonization tower body 1. A cooling water outlet 8 is located at one side of the top of the carbonization tower body 1. A steam inlet 20 is located at one side of the top of the carbonization tower body 1. The steam outlet 25 is located at one side of the bottom of the carbonization tower body 1. A temperature sensor 21 is arranged at the middle position of the carbonization tower body 1. A number of groups of diversion trays 5 are provided. Each group of diversion trays 5 is arranged adjacent to each other with a tilt at the head and tail. The kiln gas inlet pipe 6 is located below one side of the carbonization tower body 1. The waste gas discharge pipe 7 is located at the top of the carbonization tower body 1. The liquid adding pipe 9 is arranged at the top of the carbonization tower body 1. The output end of the liquid adding pipe 9 is located above the high position of the diversion trays 5. The crystal slurry flow pipeline 11 is located at the bottom of the carbonization tower body 1. The raw material inlet 16 and the auxiliary agent supplement port 18 are both arranged at the top of the pretreatment tank 2. A control valve is provided on the water control port 19. One end of the liquid adding pipe 9 is located below one side of the pretreatment tank 2. The waste gas recycling and treatment device 13 is located above the kiln gas storage device 14. A gas flow control valve is provided on the kiln gas inlet pipe 6.

[0031] Working principle: In the pretreatment tank 2, the heavy soda ash is added into the pretreatment tank 2 through the metering belt 28 to the raw material inlet 16. At the same time, the control valve on the water control port 19 is controlled to adjust the flow rate to quantitatively add desalted water into the pretreatment tank 2. Then, the driving motor 15 is started to drive the stirring rod 17 to rotate to mix the solution in the pretreatment tank 2. The heating element 27 is started to heat the solution to accelerate the formation of a sodium carbonate solution with a specified concentration. After the heavy soda ash is completely dissolved, the pretreatment agent is added through the auxiliary agent addition port 18 and stirring continues for the reaction. Then, the solution in the pretreatment tank 2 is pumped out through the pump body 10, filtered through the filter 26, and the filtrate is sent into the carbonation tower body 1 through the liquid addition pipe 9 for carbonation reaction with the kiln gas. The gas flow control valve on the kiln gas inlet pipe 6 is opened to transport the kiln gas from the bottom to the top of the carbonation tower body 1, so that the inside of the carbonation tower body 1 is filled with the kiln gas and continuously flows through the waste gas discharge pipe 7. The flow rate of the kiln gas will also affect the rate and heat release of the carbonation reaction, thus indirectly affecting the tower temperature. Therefore, the flow rate of the kiln gas also needs to be appropriately adjusted according to the tower temperature and the reaction rate. The temperature of the furnace wall is controlled by cooling the cooling water jacket 3 and the second flow control valve 24. The heat of the carbonation tower body 1 is carried away by the upward flow of the cooling water jacket 3 from the bottom up, thereby reducing the temperature inside the tower. When the tower temperature is relatively low, then the inner wall of the carbonation tower body 1 is heated by controlling the steam heating jacket 4. The steam flow rate in the steam heating jacket 4 is adjusted through the first flow control valve 22 to control the temperature. The temperature inside the furnace is monitored by the temperature sensor 21. The cooling water jacket 3 and the steam heating jacket 4 cooperate to keep the tower temperature constant within the required range. Then, it enters the carbonation tower body 1 through the liquid addition pipe 9 and alternately flows from top to bottom under the guidance of several groups of diversion tower plates 5, and forms a countercurrent contact with the upward flowing kiln gas inside the carbonation tower body 1, fully contacting and undergoing a carbonation reaction. The solution gradually forms a solid-liquid mixture of sodium bicarbonate crystal slurry. The crystal slurry flows into the thickening device 12 through the crystal slurry circulation pipeline 11 for thickening treatment, and then is sent to the centrifugal device for solid-liquid separation to form high-purity sodium bicarbonate solid. Subsequently, it can also be sent to other processes for further treatment. It can be sent into the light ash calcining furnace and decomposed again into sodium carbonate by steam heating, and after cooling, it is a high-purity sodium carbonate product. The carbon dioxide gas obtained from the calcination is incorporated into the kiln gas storage device 14. The waste gas transported upward through the waste gas discharge pipe 7 and the unreacted kiln gas can be incorporated into the waste gas recycling treatment device 13. After the waste gas is treated by the waste gas recycling treatment device 13, it is also transported to the kiln gas storage device 14 for recycling to achieve resource recycling. This device can change the alkalinity of the prepared sodium bicarbonate by adjusting the concentration of the sodium carbonate solution, and at the same time, it can also be further processed to obtain a higher-purity sodium carbonate product.

[0032] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A carbonization tower that is convenient for controlling tower temperature and sodium carbonate concentration, comprising a carbonization tower tank body (1) and a pretreatment tank (2), characterized in that: The carbonization tower tank body (1) is provided with a cooling water jacket (3), one end of the cooling water jacket (3) is provided with a cooling water inlet (23), the cooling water inlet (23) is provided with a second flow control valve (24), the other end of the cooling water jacket (3) is provided with a cooling water outlet (8), the carbonization tower tank body (1) is provided with a steam heating jacket (4), one end of the steam heating jacket (4) is provided with a steam inlet (20), the steam inlet (20) is provided with a first flow control valve (22), the other end of the steam heating jacket (4) is provided with a steam outlet (25), the carbonization tower tank body (1 ... cooling water jacket (3), one end of the cooling water jacket (3) is provided with a cooling water inlet (23), the cooling water inlet (23) is provided with a second flow control valve (24), the other end of the cooling water jacket (3) is provided with a cooling water outlet (8), the carbonization tower tank body (1) is provided with a steam heating jacket (4), one end of the steam heating jacket (4) is provided with a steam inlet (20), the steam inlet (20) is provided with a first flow control valve (22), the other end of the steam heating jacket (4) is provided with a steam outlet (25), the carbonization tower tank body (1) is provided with a cooling water jacket (3), the cooling water jacket (3) is provided with a cooling water inlet (23), the cooling water jacket (3) is provided with a cooling water outlet (8), the carbonization tower tank body (1) is provided with a steam inlet (20), the steam inlet (20) is provided with a first flow control valve (22), the other end of the steam heating jacket (4) is provided with a steam outlet (25), the A temperature sensor (21) is provided on the carbonization tower tank (1), one end of the temperature sensor (21) is located in the carbonization tower tank (1), a drainage tower plate (5) is provided in the carbonization tower tank (1), a kiln gas inlet pipe (6) is provided on one side of the carbonization tower tank (1), an exhaust gas discharge pipe (7) is provided above the carbonization tower tank (1), a cooling water outlet (8) is provided on one side of the carbonization tower tank (1), a liquid adding pipe (9) is provided above the carbonization tower tank (1), a pump body (10) is provided on the liquid adding pipe (9), and a slurry circulation pipe (11) is provided below the carbonization tower tank (1).

2. A carbonization tower for controlling tower temperature and sodium carbonate concentration according to claim 1, characterized in that: The pretreatment tank (2) is fixedly connected to a driving motor (15), an output end of the driving motor (15) is fixedly connected to a stirring rod (17), a raw material port (16) is provided on the pretreatment tank (2), an auxiliary agent replenishing port (18) is provided on the pretreatment tank (2), a water control port (19) is provided on the pretreatment tank (2), one side of the pretreatment tank (2) is fixedly connected to a liquid adding pipe (9), a filter (26) is provided on one end of the liquid adding pipe (9) close to the pretreatment tank (2), a heating element (27) is provided at the bottom of the pretreatment tank (2), and a metering belt (28) is provided above one side of the raw material port (16).

3. A carbonization tower for controlling tower temperature and sodium carbonate concentration according to claim 2, characterized in that: One end of the waste gas discharge pipe (7) is fixedly connected to a waste gas circulation treatment device (13), one end of the kiln gas intake pipe (6) is fixedly connected to a kiln gas storage device (14), and one end of the slurry circulation pipeline (11) is fixedly connected to a thickening device (12).

4. A carbonization tower for controlling tower temperature and sodium carbonate concentration according to claim 3, characterized in that: The cooling water jacket (3) is disposed on the outer wall of the carbonization tower tank body (1), the steam heating jacket (4) is disposed on the inner wall of the carbonization tower tank body (1), the cooling water inlet (23) is disposed on the bottom side of the carbonization tower tank body (1), the steam outlet (25) is disposed on the bottom side of the carbonization tower tank body (1), the cooling water outlet (8) is located on the top side of the carbonization tower tank body (1), the steam inlet (20) is located on the top side of the carbonization tower tank body (1), the steam outlet (25) is located on the bottom side of the carbonization tower tank body (1), and the temperature sensor (21) is disposed in the middle of the carbonization tower tank body (1).

5. A carbonization tower for controlling tower temperature and sodium carbonate concentration according to claim 4, characterized in that: The drainage tower plates (5) are provided in a plurality of groups, and the drainage tower plates (5) in each group are arranged adjacent to each other with their heads and tails tilted. The kiln gas inlet pipe (6) is located at a lower side of the carbonization tower tank body (1), the exhaust gas discharge pipe (7) is located at the top of the carbonization tower tank body (1), the liquid adding pipe (9) is arranged at the top of the carbonization tower tank body (1), and the output end of the liquid adding pipe (9) is located above the height of the drainage tower plates (5), and the slurry circulation pipe (11) is located at the bottom of the carbonization tower tank body (1).

6. A carbonization tower for controlling tower temperature and sodium carbonate concentration according to claim 5, characterized in that: The raw material port (16) and the auxiliary agent replenishing port (18) are both arranged at the top of the pretreatment tank (2), the water control port (19) is provided with a control valve, and one end of the liquid adding pipe (9) is located below one side of the pretreatment tank (2).

7. A carbonization tower for controlling tower temperature and sodium carbonate concentration according to claim 6, characterized in that: The waste gas circulation treatment device (13) is located above the kiln gas storage device (14), and a gas flux control valve is provided on the kiln gas inlet pipe (6).

Images