Short-process refined brine production system

Abstract

The utility model belongs to the technical field of refined brine, and particularly relates to a short-process refined brine production system, which comprises a water distribution tank, a salt dissolving tank, a filter and a refined brine tank, and crude brine sequentially passes through the water distribution tank, the salt dissolving tank and the filter to be filtered and stored in the refined brine tank. A front reaction tank, a pressurized dissolved air tank and a rear reaction tank are sequentially arranged between the salt dissolving tank and the filter, the input end of the front reaction tank is further connected with a sodium carbonate supply end, a sodium hypochlorite supply end and a sodium hydroxide supply end respectively, and the input end of the rear reaction tank is further connected with the sodium carbonate supply end. According to the utility model, the front reaction tank, the pressurized dissolved air tank and the rear reaction tank are additionally arranged between the salt dissolving tank and the filter, and the connection mode of each supply end is reasonably planned, so that compared with the traditional process, the process flow is shortened, the problem of incomplete impurity removal in the traditional process is solved, and the quality of refined brine is greatly improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of refined brine, and particularly relates to a short-process refined brine production system. BACKGROUND

[0002] Refined brine is an important raw material in the fields of chlor-alkali industry, chemical production and food processing, and its purity directly affects the subsequent process efficiency and product quality.

[0003] Traditional refined brine processes mostly adopt a multistage reaction tank series connection design, and need to sequentially complete steps such as precipitation, air flotation, flocculation, etc., resulting in a large occupied area, high energy consumption, and high equipment investment and maintenance costs, for example, the reaction and air flotation separation link usually needs to be independently set up, prolonging the processing cycle.

[0004] In addition, single-point addition of chemical reagents in the traditional refined brine process can easily lead to local concentration being too high or mixing being uneven, causing reagent waste or residual impurities not being fully removed. UTILITY MODEL CONTENTS

[0005] In order to solve the problems existing in the prior art, the utility model provides a short-process refined brine production system, by additionally arranging a front reaction tank, a pressurized dissolved gas tank and a rear reaction tank between a brine dissolving tank and a filter, and reasonably planning the connection mode of each supply end, the process flow is shortened compared with the traditional process, and the problem of incomplete removal of impurities in the traditional process is solved, greatly improving the quality of refined brine.

[0006] The utility model adopts the specific technical scheme of:

[0007] A short-process refined brine production system, comprising a water distribution tank, a brine dissolving tank, a filter and a refined brine tank, crude brine is filtered through the water distribution tank, the brine dissolving tank and the filter in sequence and stored in the refined brine tank, a front reaction tank, a pressurized dissolved gas tank and a rear reaction tank are further arranged between the brine dissolving tank and the filter, the output end of the brine dissolving tank is connected to the input end of the front reaction tank, the input end of the front reaction tank is further connected to a sodium carbonate supply end, a sodium hypochlorite supply end and a sodium hydroxide supply end respectively, the output end of the front reaction tank is connected to the input end of the pressurized dissolved gas tank, the output end of the pressurized dissolved gas tank is connected to the input end of the rear reaction tank, and the input end of the rear reaction tank is further connected to a sodium carbonate supply end, and the output end of the rear reaction tank is connected to the input end of the filter.

[0008] Further, a fused salt pump and a brine heat exchanger are further arranged between the output end of the water distribution tank and the input end of the brine dissolving tank, the crude brine in the water distribution tank enters the brine heat exchanger for heating by means of the fused salt pump, and the heated crude brine enters the brine dissolving tank through the high-temperature medium output end of the brine heat exchanger.

[0009] Further, a baffle tank is arranged between the output end of the salt dissolving tank and the input end of the front reaction tank, and the sodium carbonate, sodium hypochlorite, sodium hydroxide and the crude salt water in the salt dissolving tank are mixed in the baffle tank and then flow into the front reaction tank.

[0010] Further, a crude salt water self-suction tank is arranged between the output end of the front reaction tank and the input end of the pressurized dissolved gas tank, the output end of the front reaction tank is connected with the input end of the crude salt water self-suction tank, and the output end of the crude salt water self-suction tank is connected with the input end of the pressurized dissolved gas tank by means of a pressurized pump.

[0011] Further, a bypass is arranged in parallel with the main pipeline between the output end of the pressurized dissolved gas tank and the input end of the rear reaction tank, a mixer and a pre-treater are arranged on the main pipeline, the input end of the mixer is connected with the input end of the main pipeline, the output end of the mixer is connected with the input end of the pre-treater, the output end of the pre-treater is connected with the output end of the main pipeline, and the input end of the main pipeline and the input end of the bypass are respectively provided with a first stop valve and a second stop valve.

[0012] The present application has the following beneficial effects:

[0013] 1. In the present application, the front reaction tank, the pressurized dissolved gas tank and the rear reaction tank are arranged between the salt dissolving tank and the filter, the sodium carbonate, the sodium hypochlorite and the sodium hydroxide are added into the front reaction tank, and the sodium carbonate is added into the front reaction tank and the rear reaction tank in two steps, so that the problem of incomplete removal of impurities in the traditional process is solved, the quality of the refined salt water is greatly improved, the pipeline blockage, equipment corrosion and other problems caused by impurities are reduced, the continuity and stability of production are ensured, and the maintenance cost and production cost are reduced.

[0014] 2. The first stop valve and the second stop valve can realize the switching between the pre-treater process and the non-pre-treater process at any time, when the first stop valve is opened and the second stop valve is closed, the pre-treater process is realized, the production capacity of the refined salt water can be increased, and the product quality can be improved, when the first stop valve is closed and the second stop valve is opened, the non-pre-treater process is realized, when the main pipeline fails or needs to be maintained, the bypass can be opened to ensure the continuity of production, in addition, when the purity of the refined salt water is low, the bypass can also be used, and the production efficiency is higher, when the non-pre-treater process is used, the operating pressure is low, and the refined salt water is not deteriorated instantaneously. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 The present application is a process flow chart. DETAILED DESCRIPTION

[0016] The present application will be further described below in combination with the drawings and specific embodiments:

[0017] The embodiment, for example Figure 1 As shown in the utility model provides a short process refined brine production system, including water tank, salt dissolving pool, filter and refined brine tank, crude brine is filtered in turn through water tank, salt dissolving pool and filter and is stored in refined brine tank, still be provided with front reaction tank, pressurized gas dissolving tank and rear reaction tank between salt dissolving pool and filter, the output of salt dissolving pool is connected with the input of front reaction tank, the input of front reaction tank is still connected with sodium carbonate supply end, sodium hypochlorite supply end and sodium hydroxide supply end respectively, the output of front reaction tank is connected with the input of pressurized gas dissolving tank, the output of pressurized gas dissolving tank is connected with the input of rear reaction tank, the input of rear reaction tank is still connected with sodium carbonate supply end, and the output of rear reaction tank is connected with the input of filter.

[0018] Traditional refined brine process adopts multistage reaction tank series connection design, needs to complete precipitation, air floatation, flocculation etc. in turn, leads to large floor area, high energy consumption, and higher equipment investment and maintenance cost, for example, reaction and air floatation separation link usually needs to be independently set, prolongs the processing period.

[0019] In addition, single point adding of chemical reagent in traditional refined brine process can easily lead to local concentration too high or mixing uneven, causes reagent waste or residual impurity not to be fully removed.

[0020] In the utility model, front reaction tank, pressurized gas dissolving tank and rear reaction tank are additionally arranged between salt dissolving pool and filter, and sodium carbonate, sodium hypochlorite and sodium hydroxide are added into front reaction tank together, compared with traditional process, the process flow is shortened. In front reaction tank, sodium carbonate, sodium hypochlorite and sodium hydroxide can fully react with crude brine, remove part of bacteria and algae substances in crude brine, and generate cation impurities into precipitate; pressurized gas dissolving tank can change the physical state of crude brine, promote subsequent reaction; rear reaction tank adds sodium carbonate again to further remove impurities, this setting effectively solves the problem of incomplete impurity removal in traditional process, greatly improves the quality of refined brine, reduces pipeline blockage, equipment corrosion etc. caused by impurities, guarantees the continuity and stability of production, reduces maintenance cost and production cost.

[0021] Still be provided with fused salt pump and brine heat exchanger between the output of water tank and the input of salt dissolving pool, the crude brine in water tank enters brine heat exchanger and is heated by fused salt pump, and the heated crude brine enters salt dissolving pool along the high temperature medium output end of brine heat exchanger. After the crude brine enters brine heat exchanger and is heated by fused salt pump, the heated crude brine can accelerate the salt dissolving speed, improve the salt dissolving efficiency, make the whole production process more smooth and efficient, help to improve the production efficiency and shorten the production period, in addition, the heating medium of brine heat exchanger is recovered steam from production area, forms the recycling of heat energy, reduces the production cost.

[0022] The output end of the brine tank and the input end of the front reaction tank are also provided with a baffle tank, and sodium carbonate, sodium hypochlorite, sodium hydroxide and crude brine in the brine tank are mixed and flowed into the front reaction tank. The baffle tank makes sodium carbonate, sodium hypochlorite, sodium hydroxide and crude brine fully mixed, which optimizes the mixing process before reaction, makes the reaction substances more evenly contact, improves the reaction effect, further guarantees the quality of refined brine and improves the stability of the entire production system.

[0023] The output end of the front reaction tank and the input end of the pressurized gas tank are also provided with a crude brine self-suction tank, the output end of the front reaction tank is connected with the input end of the crude brine self-suction tank, and the output end of the crude brine self-suction tank is connected with the input end of the pressurized gas tank through a pressurizing pump. The crude brine self-suction tank can effectively adjust the flow and pressure of crude brine, which is stably conveyed to the pressurized gas tank through the pressurizing pump, ensures the stable flow and pressure of crude brine entering the pressurized gas tank, provides good conditions for subsequent reaction, guarantees the smooth progress of reaction, and further improves the quality and production efficiency of refined brine.

[0024] The main pipeline between the output end of the pressurized gas tank and the input end of the rear reaction tank is also provided with a bypass in parallel, a mixer and a pre-treater are arranged on the main pipeline, the input end of the mixer is connected with the input end of the main pipeline, the output end of the mixer is connected with the input end of the pre-treater, the output end of the pre-treater is connected with the output end of the main pipeline, and the input end of the main pipeline and the input end of the bypass are respectively provided with first and second stop valves. The first and second stop valves can realize the switching between the pre-treater process and the non-pre-treater process at any time. When the first stop valve is opened and the second stop valve is closed, the pre-treater process is realized, which can increase the production capacity of refined brine and improve the product quality. When the first stop valve is closed and the second stop valve is opened, the non-pre-treater process is realized, and when the main pipeline fails or needs to be maintained, the bypass can be opened to ensure the continuity of production. In addition, if the purity requirement of refined brine is low, the bypass can also be used, which has higher production efficiency. When the non-pre-treater process is running, the running pressure is low, which will not cause instantaneous deterioration of refined brine.

Claims

1. A short process refined brine production system comprising a water distribution tank, a salt dissolving tank, a filter, and a refined brine tank, wherein crude brine is sequentially filtered through the water distribution tank, the salt dissolving tank, and the filter, and stored in the refined brine tank, characterized in that, The brine tank is further provided with a front reaction tank, a pressurized gas tank and a rear reaction tank, the output end of the brine tank is connected with the input end of the front reaction tank, the input end of the front reaction tank is further connected with a sodium carbonate supply end, a sodium hypochlorite supply end and a sodium hydroxide supply end respectively, the output end of the front reaction tank is connected with the input end of the pressurized gas tank, the output end of the pressurized gas tank is connected with the input end of the rear reaction tank, the input end of the rear reaction tank is further connected with a sodium carbonate supply end, and the output end of the rear reaction tank is connected with the input end of the filter.

2. A short process refined brine production system according to claim 1, characterized in that, The output end of the water distribution tank is further connected with the input end of the brine tank through a molten salt pump and a brine heat exchanger, the coarse brine in the water distribution tank is heated in the brine heat exchanger through the molten salt pump, and the heated coarse brine enters the brine tank through the high-temperature medium output end of the brine heat exchanger.

3. A short process refined brine production system as claimed in claim 1, wherein, The output end of the brine tank and the input end of the front reaction tank are further provided with a baffle tank, the sodium carbonate, the sodium hypochlorite, the sodium hydroxide and the coarse brine in the brine tank are mixed in the baffle tank and then flow into the front reaction tank.

4. A short process refined brine production system as claimed in claim 1, wherein, The output end of the front reaction tank is further connected with the input end of the pressurized gas tank through a coarse brine self-suction tank, the output end of the front reaction tank is connected with the input end of the coarse brine self-suction tank, and the output end of the coarse brine self-suction tank is connected with the input end of the pressurized gas tank through a pressurized pump.

5. A short process refined brine production system as claimed in claim 1, wherein, The main pipeline between the output end of the pressurized gas tank and the input end of the rear reaction tank is further provided with a bypass in parallel, a mixer and a pre-treater are arranged on the main pipeline, the input end of the mixer is connected with the input end of the main pipeline, the output end of the mixer is connected with the input end of the pre-treater, the output end of the pre-treater is connected with the output end of the main pipeline, and the input end of the main pipeline and the input end of the bypass are respectively provided with a first stop valve and a second stop valve.

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