On-line two-alkali control device for saline water

Abstract

The utility model relates to the technical field of chemical production, and provides an on-line salt water two-alkali control device, which solves the problem of raw material waste caused by design defects of the existing salt water production device, and comprises a salt water dissolving tank, a heat exchanger, a salt dissolving pond and a buffer pond which are connected in sequence, a machine pump and a conversion valve are arranged between the salt dissolving water tank and the heat exchanger, the conversion valve has a starting state and a production state, the adjusting part is used for switching the starting state and the production state of the conversion valve, and the machine pump and the conversion valve are arranged, so that heat exchange can be directly carried out on a salt water solution in the salt dissolving pond.

Description

Technical Field

[0001] The utility model relates to the technical field of chemical production, in particular to an online two-alkali control device for brine. Background Art

[0002] Chinese patent publication number CN214300391U discloses a chlor-alkali electrolysis brine sodium hydroxide and sodium carbonate over-alkali control system, including a salt-forming pool, one side of the salt-forming pool is connected to a crude brine tank, a first solution tank is connected between the salt-forming pool and the crude brine tank, one side of the crude brine tank is connected to the crude brine tank, the crude brine tank is connected to a first post-reaction tank through a pressure pump, a first calcium and magnesium ion online analyzer is installed between the first post-reaction tank and the pressure pump, the bottom of the crude brine tank is connected to a self-introduction tank, the upper end of the first post-reaction tank is connected to a second solution tank, and one side of the first post-reaction tank is connected to the second post-reaction tank.

[0003] The utility model produces saturated brine in a salt-forming pool, passes dissolved water into the salt-forming pool, and adds crude salt into the salt-forming pool for dissolution. To increase the saturation of the brine, the dissolved water passes into the salt-forming pool and needs to be heated to 60±5°C by a heat exchanger. The saturated brine in the salt-forming pool flows into the crude brine tank through a pipeline, usually in the form of overflow gravity. After the device is shut down, the brine in the salt-forming pool will automatically cool down after being left for a period of time. The existing salt-forming pool needs to be emptied, resulting in waste of raw materials. Utility Model Content

[0004] Therefore, in view of the above problems, the utility model provides an online two-alkali control device for brine to solve the problem of waste of raw materials due to design defects in existing brine production devices.

[0005] In order to achieve the above object, the utility model is realized by the following technical solutions:

[0006] A brine online two-alkali control device comprises a brine tank, a heat exchanger, a brine tank and a buffer tank, wherein the brine tank, the heat exchanger, the brine tank and the buffer tank are connected in sequence, a pump and a steering valve are arranged between the brine tank and the heat exchanger, the steering valve comprises a shell and an adjusting component, a liquid inlet and a liquid outlet are arranged on the shell, the liquid inlet comprises a first liquid inlet and a second liquid inlet, the liquid outlet is connected to the inlet of the pump, the outlet of the pump is connected to the heat exchanger, the first liquid inlet is connected to the brine tank, the second liquid inlet is connected to the brine tank, the steering valve has a start-up state and a production state, the adjusting component is used to switch the start-up state and the production state of the steering valve, when in the start-up state, the second liquid inlet is connected to the liquid outlet, when in the production state, the first liquid inlet is connected to the liquid outlet.

[0007] Furthermore, a liquid inlet channel is provided in the shell, and the liquid inlet channel includes a first liquid inlet channel connected to the first liquid inlet port and a second liquid inlet channel connected to the second liquid inlet port, the first liquid inlet channel and the second liquid inlet channel are connected through a connecting channel, and a plug is provided at one end of the liquid inlet channel away from the liquid inlet port;

[0008] The adjusting component is arranged in the shell, and the adjusting component includes a telescopic rod, a spring and an adjusting handle. The adjusting handle is arranged on the side of the plug away from the liquid inlet. Telescopic rods are arranged in the first liquid inlet channel and the second liquid inlet channel. An expansion head is arranged at one end of each telescopic rod. The spring is arranged between the expansion head and the liquid inlet. The other end of each telescopic rod extends out of the plug. The adjusting handle is rotated to achieve contact with only one of the telescopic rods.

[0009] Furthermore, the adjusting handle is provided with two limiting plates.

[0010] Furthermore, the adjusting handle is provided with a limiting plate and a limiting protrusion.

[0011] Furthermore, a sodium carbonate analyzer and a sodium hydroxide analyzer are provided between the salt tank and the buffer tank.

[0012] Furthermore, the outlet pressure of the pump is 0.35MPa-0.45MPa.

[0013] Furthermore, the NaCl content in the solution flowing from the salt pool into the buffer pool is 300g / L-320g / L.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] 1. The utility model can change the liquid sent into the heat exchanger by the machine pump through the steering valve, from the liquid in the brine tank to the liquid in the brine pool, through the arrangement of the machine pump and the steering valve, and then directly exchange heat with the brine solution in the brine pool after the device is shut down. After the heat exchange is completed, the water in the brine tank can be passed into the heat exchanger through the switching of the steering valve again to dilute the saturated brine solution retained in the heat exchanger, so as to avoid crystallization inside the heat exchanger after cooling and blockage of the pipeline.

[0016] 2. The utility model can form proportional control with the amount of water flowing into the buffer tank through the setting of a sodium carbonate analyzer and a sodium hydroxide analyzer, automatically adjust the amount of sodium carbonate and NaOH added to achieve the indicators of the two alkalis, without the need for manual analysis, saving labor costs, and realizing real-time data monitoring. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the structure of an embodiment of the utility model;

[0018] Figure 2 This is a schematic diagram of the structure of the steering valve in production state according to an embodiment of the utility model;

[0019] Figure 3 This is a schematic diagram of the structure of the steering valve in the startup state of the embodiment of the utility model;

[0020] Figure 4 This is a schematic diagram of the structure of the steering valve in the embodiment of the utility model;

[0021] Figure 5 It is a schematic diagram of the limiting protrusion structure of an embodiment of the utility model.

[0022] Description of Figure Numbers

[0023] Brine tank 1;

[0024] Heat exchanger 2;

[0025] Salt pool 3;

[0026] Buffer pool 4;

[0027] Pump 5;

[0028] Steering valve 6;

[0029] Shell 7; liquid inlet 71; first liquid inlet 711; second liquid inlet 712; liquid outlet 72; liquid inlet channel 73; first liquid inlet channel 731; second liquid inlet channel 732; connecting channel 74; plug 75;

[0030] Adjustment component 8; telescopic rod 81; spring 82; adjustment handle 83; expansion head 84; limiting piece 85; limiting protrusion 86. DETAILED DESCRIPTION

[0031] The following will describe the implementation methods of the present invention in detail in conjunction with specific embodiments, so that the implementation process of how the present invention applies technical means to solve technical problems and achieve technical effects can be fully understood and implemented accordingly.

[0032] Example

[0033] like Figures 1 to 5As shown, a brine online two-alkali control device comprises a brine tank 1, a heat exchanger 2, a brine tank 3 and a buffer tank 4, wherein the brine tank 1, the heat exchanger 2, the brine tank 3 and the buffer tank 4 are connected in sequence, a pump 5 and a steering valve 6 are arranged between the brine tank 1 and the heat exchanger 2, the steering valve 6 comprises a housing 7 and an adjusting component 8, a liquid inlet 71 and a liquid outlet 72 are arranged on the housing 7, the liquid inlet 71 comprises a first liquid inlet 711 and a second liquid inlet 712, the liquid outlet 72 is connected to the pump 5 and ... The inlet of the pump 5 is connected, the outlet of the pump 5 is connected to the heat exchanger 2, the first liquid inlet 711 is connected to the salt water tank 1, the second liquid inlet 712 is connected to the salt water tank 3, the steering valve 6 has a start state and a production state, the regulating component 8 is used to switch the start state and the production state of the steering valve 6, when in the start state, the second liquid inlet 712 is connected to the liquid outlet 72, when in the production state, the first liquid inlet 711 is connected to the liquid outlet 72;

[0034] By setting the pump 5 and the steering valve 6, the liquid sent into the heat exchanger 2 by the pump 5 can be converted from the liquid in the brine tank 1 to the liquid in the brine pool 3 through the steering valve 6, and then after the device is shut down, the brine solution in the brine pool 3 can be directly heat exchanged. After the heat exchange is completed, the water in the brine tank 3 can be passed into the heat exchanger 2 through the switching of the steering valve 6 again to dilute the saturated brine solution retained in the heat exchanger 2, so as to avoid crystallization inside the heat exchanger 2 after cooling and clogging the pipeline;

[0035] The housing 7 is provided with a liquid inlet channel 73, the liquid inlet channel 73 includes a first liquid inlet channel 731 connected to the first liquid inlet port 711 and a second liquid inlet channel 732 connected to the second liquid inlet port 712, the first liquid inlet channel 731 and the second liquid inlet channel 732 are connected via a connecting channel 74, and a plug 75 is provided at one end of the liquid inlet channel 73 away from the liquid inlet port 71;

[0036] The adjusting component 8 is arranged in the housing 7, and the adjusting component 8 includes a telescopic rod 81, a spring 82 and an adjusting handle 83. The adjusting handle 83 is arranged on the side of the plug 75 away from the liquid inlet 72. The first liquid inlet channel 731 and the second liquid inlet channel 732 are both provided with a telescopic rod 81, and one end of each telescopic rod 81 is provided with an expansion head 84. The spring 82 is arranged between the expansion head 84 and the liquid inlet 71, and the other end of each telescopic rod 81 extends out of the plug 75. The adjusting handle 83 is rotated to achieve contact with only one of the telescopic rods 81. Two limiting plates 85 are arranged on the adjusting handle 83, which are correspondingly arranged on one side of each telescopic rod 81 to limit the rotation of the adjusting handle 83; in other preferred embodiments, a limiting plate 85 and a limiting protrusion 86 may also be provided;

[0037] The outlet pressure of the pump 5 is 0.35MPa-0.45MPa, the NaCl content in the solution flowing from the salt pool 3 into the buffer pool 4 is 300g / L-320g / L, a sodium carbonate analyzer 31 and a sodium hydroxide analyzer 32 are provided between the salt pool 3 and the buffer pool 4, and the sodium carbonate index in the liquid flowing into the buffer pool 4 is 0.3g / L-0.7g / L, and the sodium hydroxide index is 0.1g / L-0.4g / L;

[0038] By setting up the sodium carbonate analyzer 31 and the sodium hydroxide analyzer 32, a proportional control can be formed with the amount of water flowing into the buffer tank 4, and the amount of sodium carbonate and NaOH added can be automatically adjusted to achieve the indicators of the two alkalis, without the need for manual analysis, saving labor costs, and realizing real-time data monitoring.

[0039] Although the present invention has been specifically demonstrated and described in conjunction with the preferred embodiments, those skilled in the art should understand that various changes may be made to the present invention in form and detail without departing from the spirit and scope of the present invention as defined in the appended claims, all of which are within the scope of protection of the present invention.

Claims

1. A brine online two-alkali control device, comprising a brine tank, a heat exchanger, a brine tank and a buffer tank, characterized in that: The chemical salt water tank, heat exchanger, chemical salt pool and buffer pool are connected in sequence. A machine pump and a steering valve are arranged between the chemical salt water tank and the heat exchanger. The steering valve comprises a shell and an adjusting component. A liquid inlet and a liquid outlet are arranged on the shell. The liquid inlet comprises a first liquid inlet and a second liquid inlet. The liquid outlet is connected to the inlet of the machine pump. The outlet of the machine pump is connected to the heat exchanger. The first liquid inlet is connected to the chemical salt water tank, and the second liquid inlet is connected to the chemical salt pool. The steering valve has a startup state and a production state. The adjusting component is used to switch the startup state and the production state of the steering valve. When in the startup state, the second liquid inlet is connected to the liquid outlet. When in the production state, the first liquid inlet is connected to the liquid outlet.

2. The online two-alkali control device for brine according to claim 1 is characterized in that: A liquid inlet channel is provided in the shell, and the liquid inlet channel includes a first liquid inlet channel connected to the first liquid inlet port and a second liquid inlet channel connected to the second liquid inlet port, the first liquid inlet channel and the second liquid inlet channel are connected through a connecting channel, and a plug is provided at one end of the liquid inlet channel away from the liquid inlet port; The adjusting component is arranged in the shell, and the adjusting component includes a telescopic rod, a spring and an adjusting handle. The adjusting handle is arranged on the side of the plug away from the liquid inlet. Telescopic rods are arranged in the first liquid inlet channel and the second liquid inlet channel. An expansion head is arranged at one end of each telescopic rod. The spring is arranged between the expansion head and the liquid inlet. The other end of each telescopic rod extends out of the plug. The adjusting handle is rotated to achieve contact with only one of the telescopic rods.

3. The online two-alkali control device for brine according to claim 2 is characterized in that: The adjusting handle is provided with two limiting pieces.

4. The online two-alkali control device for brine according to claim 2 is characterized in that: The adjusting handle is provided with a limiting piece and a limiting protrusion.

5. The online two-alkali control device for brine according to claim 1 is characterized in that: A sodium carbonate analyzer and a sodium hydroxide analyzer are arranged between the salt tank and the buffer tank.

6. The online two-alkali control device for brine according to claim 1 is characterized by: The outlet pressure of the pump is 0.35MPa-0.45MPa.

7. The online two-alkali control device for brine according to claim 1 is characterized by: The NaCl content in the solution flowing from the salt pool into the buffer pool is 300g / L-320g / L.

Images