Centrifugal structure in four-effect evaporation system

Abstract

A centrifugal structure in a quadruple-effect evaporation system comprises a thickener, a centrifugal machine and a mother liquor tank, a crystal mush inlet of the thickener is connected with a quadruple-effect crystallizer through a pipeline, the crystal mush inlet of the thickener is connected with the centrifugal machine through a pipeline, and a mother liquor outlet of the centrifugal machine is connected with the mother liquor tank through a pipeline. The two centrifugal machines including the centrifugal machine I and the centrifugal machine II are arranged, the centrifugal machine I can be independently switched to the centrifugal machine II when the centrifugal machine I needs to be shut down to be cleaned, so that production can be continuously carried out, the production efficiency is improved, the production cost is reduced, and the production efficiency is improved. The system is more perfect, and the production efficiency and the economic performance are improved.

Description

Technical Field

[0001] The utility model relates to the technical field related to sewage treatment, in particular to a centrifugal structure in a four-effect evaporation system. Background Art

[0002] In industries such as chemical processing, hazardous waste incineration, petroleum refining, textiles, and food processing, high-salt wastewater and condensate are commonly generated during production. These high-salt wastewaters contain high concentrations of salt, typically including various organic and inorganic compounds such as sodium chloride, sodium sulfate, and sodium nitrate. Condensate is primarily used to cool equipment, and if discharged directly, these wastewaters will have a certain impact on the environment. With the advancement of science and technology, society's requirements for environmental protection are becoming increasingly stringent, and a series of new environmental protection policies and regulations have been continuously introduced. The treatment of high-salt wastewater containing sodium sulfate and condensate has become a major factor restricting the development of some industries. Currently, most high-salt wastewater treatment processes containing sodium sulfate only use a single centrifuge. However, during the centrifugation process, the salt outlet can become clogged due to excessive salt concentration. Therefore, the centrifuge needs to be shut down and cleaned to prevent blockage, which can lead to production stagnation and low production efficiency. Utility Model Content

[0003] The purpose of the utility model is to provide a centrifugal structure in a four-effect evaporation system, aiming to solve the above technical problems. The utility model is provided with two centrifuges, including centrifuge No. 1 and centrifuge No. 2. When centrifuge No. 1 needs to be stopped for cleaning, it can be switched to centrifuge No. 2 separately. This arrangement allows production to continue, makes the system more perfect, and improves production efficiency and economic performance.

[0004] In order to achieve the above-mentioned purpose, the present invention is implemented through the following technical solutions:

[0005] A centrifugal structure in a four-effect evaporation system comprises a thickener, a centrifuge and a mother liquor tank, wherein the slurry inlet of the thickener is connected to the four-effect crystallizer via a pipeline, the slurry inlet of the thickener is connected to the centrifuge via a pipeline, the mother liquor outlet of the centrifuge is connected to the mother liquor tank via a pipeline, and the mother liquor outlet of the mother liquor tank is connected to a four-effect circulation pipe via a pipeline.

[0006] Furthermore, the centrifuge includes centrifuge No. 1 and centrifuge No. 2, and each of the centrifuge No. 1 and centrifuge No. 2 is provided with a three-way regulating valve, which can separate the mother liquor and tail gas in the centrifuge to achieve the effect of gas-liquid separation and facilitate subsequent processing. The tail gas outlet of the centrifuge No. 1 is connected to the tail gas main through a pipeline, the sodium sulfate crystal outlet of the centrifuge No. 1 is connected to the ground, and the mother liquor inlet of the centrifuge No. 1 is connected to the thickener through a pipeline.

[0007] Furthermore, the slurry inlet of the centrifuge No. 2 is connected to the thickener through a pipeline, the tail gas outlet of the centrifuge No. 2 is connected to the outside through a pipeline, the mother liquor outlet of the centrifuge No. 2 is connected to the mother liquor tank through a pipeline, and the sodium sulfate crystal outlet of the centrifuge No. 2 is connected to the ground. The centrifuge No. 1 and the centrifuge No. 2 have the same effect. Through centrifugal separation, insoluble impurities in the mother liquor can be removed and the purity of the mother liquor can be improved; the centrifuge No. 2 serves as a backup. When the centrifuge needs to be stopped for cleaning, another centrifuge can be switched separately without stopping the salt outlet, thereby avoiding blockage of the lower salt outlet pipeline.

[0008] Furthermore, the slurry outlet of the thickener is connected to the four-effect crystallizer through a pipeline, the mother liquor outlet of the thickener is connected to the mother liquor tank through a pipeline, and the mother liquor outlet of the centrifuge is connected to the mother liquor tank through a pipeline.

[0009] Furthermore, the mother liquid outlet of the mother liquid tank is connected to the mother liquid temporary storage tank through a pipeline.

[0010] Furthermore, the external mother liquor outlet of the external mother liquor temporary storage tank is connected to the external mother liquor pipe through a pipeline, and the mother liquor outlet is connected to the four-effect circulation pipe through a pipeline.

[0011] Furthermore, a density regulating valve is provided on the thickener, and a discharge pump and a pressure gauge are provided between the thickener and the four-effect crystallizer. The function of the thickener is to increase the solid ratio of the slurry, while also playing a role in particle maturation and further consuming the supersaturation remaining in the slurry.

[0012] Furthermore, the mother liquid tank is also provided with a liquid level transmitter and an electromagnetic flowmeter, and a liquid level regulating valve, a steam condensate purge, a pressure gauge and a mother liquid pump are provided between the mother liquid tank and the four-effect circulation pipe.

[0013] Furthermore, a liquid level transmitter and an electromagnetic flowmeter are provided on the external mother liquid temporary storage tank, and a steam condensate purge, a pressure gauge and an external mother liquid pump are provided between the external mother liquid temporary storage tank and the external mother liquid pipe.

[0014] Furthermore, flushing pipe openings are provided on the slurry inlet pipeline and slurry outlet pipeline between centrifuge No. 1 and the thickener, between centrifuge No. 2 and the thickener, and between the thickener and the four-effect crystallizer, and the flushing pipe openings are also provided with ball valves and steam condensate purgers.

[0015] The centrifugal structure in the four-effect evaporation system of the utility model has the following beneficial effects:

[0016] 1. The utility model is a centrifugal structure in a four-effect evaporation system. The utility model is provided with two centrifuges, including centrifuge No. 1 and centrifuge No. 2. When centrifuge No. 1 needs to be shut down for cleaning, it can be switched to centrifuge No. 2 independently. This arrangement allows production to continue without stagnation, making the system more perfect and improving production efficiency and economic performance.

[0017] 2. The centrifugal structure in the four-effect evaporation system of the utility model is further improved by adding various water pumps and various detectors to each system. There is no need for manual monitoring of the system at all times, which reduces labor consumption and is conducive to reducing costs and increasing efficiency.

[0018] 3. The utility model is a centrifugal structure in a four-effect evaporation system. With such a system structure, the operating cycle is set so that the system must be stopped for high-pressure cleaning every four months. Now it has been running for four months and there has been no obvious decline in processing capacity, which greatly improves production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the overall structure of a centrifugal structure in a four-effect evaporation system of the utility model;

[0020] Figure 2 This is a piping code indication diagram for a centrifugal structure in a four-effect evaporation system of the utility model. DETAILED DESCRIPTION

[0021] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be described in further detail below with reference to the embodiments and accompanying drawings.

[0022] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be an intermediate element; when an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation methods.

[0023] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this invention pertains. The terms used herein in the specification of this invention are intended solely for the purpose of describing specific embodiments and are not intended to limit this invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0024] like Figure 1 and Figure 2As shown, a centrifugal structure in a four-effect evaporation system includes a thickener 2, a centrifuge and a mother liquor tank 5. The slurry inlet of the thickener 2 is connected to the four-effect crystallizer 1 through a pipeline, the slurry inlet of the thickener 2 is connected to the centrifuge through a pipeline, the mother liquor outlet of the centrifuge is connected to the mother liquor tank 5 through a pipeline, and the mother liquor outlet of the mother liquor tank 5 is connected to the four-effect circulation pipe 7 through a pipeline.

[0025] like Figure 1 and Figure 2 As shown, the centrifuge includes centrifuge No. 1 3 and centrifuge No. 2 4. Both centrifuge No. 1 3 and centrifuge No. 2 4 are provided with a three-way regulating valve 14. The three-way regulating valve 14 can separate the mother liquor and tail gas in the centrifuge to achieve the effect of gas-liquid separation and facilitate subsequent processing. The tail gas outlet of the centrifuge No. 1 3 is connected to the tail gas main 9 through a pipeline, the sodium sulfate crystal outlet of the centrifuge No. 1 3 is connected to the ground, and the mother liquor inlet of the centrifuge No. 1 3 is connected to the thickener 2 through a pipeline.

[0026] like Figure 1 and Figure 2 As shown, the slurry inlet of the centrifuge No. 2 4 is connected to the thickener 2 through a pipeline, the tail gas outlet of the centrifuge No. 2 4 is connected to the outside through a pipeline, the mother liquor outlet of the centrifuge No. 2 4 is connected to the mother liquor tank 5 through a pipeline, and the sodium sulfate crystal outlet of the centrifuge No. 2 4 is connected to the ground. The centrifuge No. 1 3 has the same effect as the centrifuge No. 2 4. Through centrifugal separation, the insoluble impurities in the mother liquor can be removed and the purity of the mother liquor can be improved; the centrifuge No. 2 4 plays a backup role. When the centrifuge needs to be stopped for cleaning, another one can be switched separately without stopping the salt outlet, thereby avoiding blockage of the lower salt outlet pipeline.

[0027] like Figure 1 and Figure 2 As shown, the slurry outlet of the thickener 2 is connected to the four-effect crystallizer 1 through a pipeline, the mother liquor outlet of the thickener 2 is connected to the mother liquor tank 5 through a pipeline, and the mother liquor outlet of the centrifuge is connected to the mother liquor tank 5 through a pipeline.

[0028] like Figure 1 and Figure 2 As shown, the external mother liquid outlet of the mother liquid tank 5 is connected to the external mother liquid temporary storage tank 66 through a pipeline.

[0029] like Figure 1 and Figure 2 As shown, the mother liquor outlet of the mother liquor temporary storage tank 6 is connected to the mother liquor pipe 8 through a pipeline, and the mother liquor outlet is connected to the four-effect circulation pipe 7 through a pipeline.

[0030] like Figure 1 and Figure 2As shown, the thickener 2 is provided with a density regulating valve 19, and a discharge pump 18 and a pressure gauge 10 are provided between the thickener 2 and the four-effect crystallizer 1. The function of the thickener 2 is to increase the solid ratio of the slurry, while also playing the role of particle maturation and further consuming the supersaturation remaining in the slurry.

[0031] It should be noted that: in this embodiment, the pressure gauge 10 is used to detect whether the work in the pipeline is proceeding normally, and the density regulating valve 19 can divide the slurry acted on by the thickener 2 into three categories. One part flows into the mother liquid tank 5 through the pipeline as the mother liquid, and the other part flows to the centrifuge No. 1 3 through the pipeline. Finally, the slurry that is not sufficiently thickened returns to the four-effect crystallizer 1 through the pipeline to be thickened again.

[0032] like Figure 1 and Figure 2 As shown, the mother liquid tank 5 is also provided with a liquid level transmitter 12 and an electromagnetic flowmeter 13, and a liquid level regulating valve 11, a steam condensate purge 15, a pressure gauge 10 and a mother liquid pump 16 are provided between the mother liquid tank 5 and the four-effect circulation pipe 7.

[0033] like Figure 1 and Figure 2 As shown, the external mother liquid temporary storage tank 6 is provided with a liquid level transmitter 12 and an electromagnetic flowmeter 13, and a steam condensate purge 15, a pressure gauge 10 and an external mother liquid pump 17 are provided between the external mother liquid temporary storage tank 6 and the external mother liquid pipe 8.

[0034] like Figure 1 and Figure 2 As shown, a flushing pipe opening 13 is provided on the slurry inlet pipe and the slurry outlet pipe between the centrifuge No. 1 3 and the thickener 2, between the centrifuge No. 2 4 and the thickener 2, and between the thickener 2 and the four-effect crystallizer 1. A ball valve and a steam condensate purge 15 are also provided on the flushing pipe opening 13. The ball valve and the steam condensate purge 15 can be used to clean the pipe.

[0035] It should be noted that: in this embodiment, the slurry is first transferred from the four-effect crystallizer 1 to the thickener 2 through a pipeline. After being processed by the thickener 2, a part of the slurry is transferred through a pipeline to the centrifuge No. 1 3 for processing, and a part of it is converted into mother liquor and flows through a pipeline to the mother liquor tank 5; after being processed by the centrifuge No. 1 3, a part of the slurry is converted into mother liquor and flows through a pipeline to the mother liquor tank 5, a part of it is converted into sodium sulfate crystals and falls to the ground, and a part of the tail gas is discharged to the external tail gas main 9 through a pipeline; the mother liquor is finally diverted in the mother liquor tank 5, and a part of the external mother liquor is stored in the external mother liquor temporary storage tank 6 through a pipeline, and is subsequently discharged through the action of the external mother liquor pump 17, and the mother liquor The salt is then transported to the four-effect circulation pipe 7 for subsequent processing through the action of the mother liquor pump 16 and the flow regulating valve; the functions of centrifuge No. 2 4 and centrifuge No. 1 3 are exactly the same. During the centrifugation process, the salt outlet will be blocked due to excessive salt concentration. Therefore, the centrifuge needs to be stopped and cleaned to avoid blockage of the salt outlet. At this time, it can be switched to centrifuge No. 2 4 alone. This setting allows production to continue. Centrifuge No. 1 3 can open the ball valve to clean centrifuge No. 1 3 and the connected pipes by flushing the pipe port 13. When centrifuge No. 2 4 is blocked, it can be switched back to centrifuge No. 1 3 to continue working, and centrifuge No. 2 4 can be cleaned.

[0036] The above description is only a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Any ordinary technician in the industry can smoothly implement the present invention as shown in the drawings and described above. However, any technician familiar with the profession can make some changes, modifications and equivalent changes made by using the technical content disclosed above without departing from the scope of the technical solution of the present invention, which are all equivalent embodiments of the present invention. At the same time, any equivalent changes, modifications and evolutions made to the above embodiments based on the essential technology of the present invention still belong to the technical solution of the present invention.

Claims

1. A centrifugal structure in a four-effect evaporation system, characterized in that: The invention comprises a thickener, a centrifuge and a mother liquor tank. The slurry inlet of the thickener is connected to the four-effect crystallizer through a pipeline. The slurry inlet of the thickener is connected to the centrifuge through a pipeline. The mother liquor outlet of the centrifuge is connected to the mother liquor tank through a pipeline. The mother liquor outlet of the mother liquor tank is connected to the four-effect circulation pipe through a pipeline.

2. The centrifugal structure in the four-effect evaporation system according to claim 1, characterized in that: The centrifuge includes centrifuge No. 1 and centrifuge No.

2. Both centrifuge No. 1 and centrifuge No. 2 are equipped with three-way regulating valves. The tail gas outlet of centrifuge No. 1 is connected to the tail gas main pipe through a pipeline, the sodium sulfate crystal outlet of centrifuge No. 1 is connected to the ground, and the mother liquor inlet of centrifuge No. 1 is connected to the thickener through a pipeline.

3. The centrifugal structure in the four-effect evaporation system according to claim 2, characterized in that: The slurry inlet of the centrifuge No. 2 is connected to the thickener through a pipeline, the tail gas outlet of the centrifuge No. 2 is connected to the outside through a pipeline, the mother liquor outlet of the centrifuge No. 2 is connected to the mother liquor tank through a pipeline, and the sodium sulfate crystal outlet of the centrifuge No. 2 is connected to the ground.

4. The centrifugal structure in the four-effect evaporation system according to claim 2, characterized in that: The slurry outlet of the thickener is connected to the four-effect crystallizer through a pipeline, the mother liquor outlet of the thickener is connected to the mother liquor tank through a pipeline, and the mother liquor outlet of the centrifuge is connected to the mother liquor tank through a pipeline.

5. The centrifugal structure in the four-effect evaporation system according to claim 1, characterized in that: The external mother liquid outlet of the mother liquid tank is connected to the external mother liquid temporary storage tank through a pipeline.

6. The centrifugal structure in the four-effect evaporation system according to claim 5, characterized in that: The external mother liquid outlet of the external mother liquid temporary storage tank is connected to the external mother liquid pipe through a pipeline, and the mother liquid outlet is connected to the four-effect circulation pipe through a pipeline.

7. The centrifugal structure in the four-effect evaporation system according to claim 1, characterized in that: A density regulating valve is provided on the thickener, and a discharge pump and a pressure gauge are provided between the thickener and the four-effect crystallizer.

8. The centrifugal structure in the four-effect evaporation system according to claim 1, characterized in that: The mother liquid tank is also provided with a liquid level transmitter and an electromagnetic flow meter, and a liquid level regulating valve, a steam condensate purge, a pressure gauge and a mother liquid pump are provided between the mother liquid tank and the four-effect circulation pipe.

9. The centrifugal structure in the four-effect evaporation system according to claim 5, characterized in that: The external mother liquid temporary storage tank is provided with a liquid level transmitter and an electromagnetic flow meter, and a steam condensate purger, a pressure gauge and an external mother liquid pump are provided between the external mother liquid temporary storage tank and the external mother liquid pipe.

10. The centrifugal structure in the four-effect evaporation system according to claim 2, characterized in that: Flushing pipe openings are provided on the slurry inlet pipeline and slurry outlet pipeline between centrifuge No. 1 and the thickener, between centrifuge No. 2 and the thickener, and between the thickener and the four-effect crystallizer, and the flushing pipe openings are also provided with ball valves and steam condensate purgers.

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