Mechanical seal water recycling device

Abstract

The utility model provides a mechanical seal water recycling device, which relates to the technical field of chlor-alkali production, and comprises a plurality of mechanical seal water collecting branch lines which are arranged in parallel, and each mechanical seal water collecting branch line is used for collecting mechanical seal water discharged by a corresponding workshop section of a chlor-alkali production device; and the inlet end of the mechanical seal water conveying header pipe is connected with the outlet end of the mechanical seal water collecting branch line, and the outlet end of the mechanical seal water conveying header pipe is connected with the desalted water production system after being converged with the process condensate water. The quality of the machine seal water discharged from each workshop section of the chlor-alkali production device is good, the yield can be increased to 95% or above after the machine seal water is used for producing desalted water, the machine seal water can replace industrial water to produce desalted water, and the production requirement is met. Meanwhile, the production cost of the existing desalted water is higher, and after the mechanical seal water is recycled, not only is the consumption of industrial water reduced, but also the yield of the desalted water is improved, so that certain economic benefits are increased.

Description

Technical Field

[0001] The utility model relates to the technical field of chlor-alkali production, in particular to a machine sealing water recycling device. Background Art

[0002] At present, all the pump seal water (seal cooling water) of the company's chlor-alkali production equipment uses desalted water, most of which is discharged after use (about 21m 3 / h) goes to the ditch without being recycled, resulting in a waste of water resources. Utility Model Content

[0003] In view of the above situation, the utility model provides a machine seal water recycling device, which aims to solve the technical problem that the machine pump seal water of the company's chlor-alkali production equipment currently uses desalted water, most of which is discharged into the ditch after use and is not recycled, resulting in a waste of water resources.

[0004] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0005] The utility model provides a machine seal water recycling device, comprising:

[0006] A machine seal water collecting branch line, wherein multiple machine seal water collecting branch lines are arranged in parallel, and each machine seal water collecting branch line is used to collect the machine seal water discharged from the corresponding section of the chlor-alkali production device;

[0007] The inlet of the machine seal water delivery main pipe is connected with the outlet of the machine seal water collecting branch line, and the outlet of the machine seal water delivery main pipe is connected with the desalted water production system after merging with the process condensate water.

[0008] In some embodiments of the present invention, the chlor-alkali production device includes a brine concentration section, a primary brine section, a chlorine-hydrogen waste gas treatment section, a secondary brine section and a 50% alkali evaporation section.

[0009] In some embodiments of the present invention, the sealing water collection branch line includes a sealing water collection container, a sealing water suction pipe, a sealing water delivery pump and a sealing water delivery branch pipe connected in sequence; the sealing water delivery branch pipe is connected to the sealing water delivery main pipe.

[0010] In some embodiments of the utility model, it also includes a branch line water quality monitoring component and a branch line regulating valve which are arranged on the mechanical seal water collection branch line and are related to each other.

[0011] In some embodiments of the present invention, the branch line water quality monitoring component includes a branch line conductivity monitor.

[0012] In some embodiments of the utility model, it also includes a main pipe water quality monitoring component and a main pipe cut-off valve that are arranged on the machine seal water delivery main pipe and are related to each other.

[0013] In some embodiments of the present invention, the main pipe water quality monitoring component includes a main pipe conductivity monitor.

[0014] In some embodiments of the present invention, the main pipe water quality monitoring component includes a main pipe ORP monitor.

[0015] In some embodiments of the present invention, a sewage pipe is further provided with a sewage valve.

[0016] In some embodiments of the present invention, the drain valve is associated with a main pipe water quality monitoring component.

[0017] The embodiments of the present invention have at least the following advantages or beneficial effects:

[0018] The water quality of the external sealing water of each section of the chlor-alkali production device is good. After being used to produce desalted water, the yield can be increased to more than 95%. It can replace industrial water to produce desalted water, meeting production needs. At the same time, the existing desalted water production cost is relatively high. By recycling this part of the sealing water, not only the consumption of industrial water is reduced, but also the output of desalted water is increased, thereby increasing certain economic benefits.

[0019] Other features and advantages of the present invention will be set forth in the following description, and in part will become apparent from the description, or may be understood by practicing the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0021] Figure 1 This is a schematic diagram of the structure of the machine seal water recycling device.

[0022] icon:

[0023] 11-machine sealing water collection container, 12-machine sealing water suction pipe, 13-machine sealing water delivery pump, 14-machine sealing water delivery branch pipe, 15-branch line conductivity monitor, 16-branch line regulating valve, 17-liquid level meter,

[0024] 2-machine seal water delivery main pipe, 21-main pipe conductivity monitor, 22-main pipe ORP monitor, 23-drain valve, 24-drain pipe,

[0025] 3- Ditch. DETAILED DESCRIPTION

[0026] In the following, only some exemplary embodiments are briefly described. As those skilled in the art can appreciate, the described embodiments can be modified in various different ways without departing from the spirit or scope of the embodiments of the present invention.

[0027] In the description of the embodiments of the present invention, it should be understood that the term "plurality" means two or more than two, unless otherwise clearly and specifically defined.

[0028] In the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral body; it can be directly connected, or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0029] The embodiments of the present utility model are described in detail below with reference to the accompanying drawings.

[0030] See also Figure 1 This embodiment provides a machine sealing water recycling device, including a machine sealing water collecting branch line and a machine sealing water conveying main pipe 2.

[0031] Multiple machine seal water collection branches are set in parallel ( Figure 1 Only one mechanical seal water collection branch line is shown, and other branches are set up for reference). Each mechanical seal water collection branch line is used to collect the mechanical seal water discharged from the corresponding section of the chlor-alkali production unit. These mechanical seal waters come from, for example, the brine concentration section, primary brine section, hydrogen chlorine waste gas treatment section, secondary brine section, 50% alkali evaporation section, etc. of the chlor-alkali production unit.

[0032] The sealing water collecting branch line includes a sealing water collecting container 11, a sealing water suction pipe 12, a sealing water delivery pump 13 and a sealing water delivery branch pipe 14 which are connected in sequence. The sealing water delivery branch pipe 14 is connected to the sealing water delivery main pipe 2. The sealing water collecting container 11 is provided with a liquid level meter 17.

[0033] The inlet of the main machine seal water delivery pipe 2 is connected to the outlet of the machine seal water collecting branch line, and the outlet of the main machine seal water delivery pipe 2 is connected to the desalted water production system after merging with the process condensed water.

[0034] The above-mentioned machine seal water recycling device collects the machine seal water discharged from each section of the chlor-alkali production device into the corresponding machine seal water collection container 11 in each section, and then mixes it with the process condensed water and transports it to the desalted water production system for producing desalted water. The reason and benefit of such arrangement are: with the change of production configuration and the change of some equipment and facilities, the total consumption of desalted water in the production device has increased, and the water production capacity of the desalted water system is slightly insufficient, which affects normal production. At present, industrial water is used to produce desalted water, and the yield is about 60-65%. Limited by the design capacity of the device, even if the industrial water consumption is increased, it still cannot meet the demand for desalted water. Therefore, to improve the water production rate of the desalted water system, the water quality of the inlet water must be improved. The water quality of this part of the machine seal water discharged is good. After being used to produce desalted water, the yield can be increased to more than 95%, which can replace industrial water to produce desalted water and meet the production needs. At the same time, the existing desalted water production cost is relatively high (about 4.5 yuan / m3). By recycling this part of the machine seal water, not only the consumption of industrial water is reduced, but also the output of desalted water is increased, thereby increasing certain economic benefits.

[0035] Each machine sealing water collecting branch line includes two parallel machine sealing water delivery pumps 13, and the two machine sealing water delivery pumps 13 can be one in operation and one in standby. There can also be more than two machine sealing water delivery pumps 13.

[0036] The mechanical seal water recycling device may also include a branch line water quality monitoring component and a branch line regulating valve 16 which are arranged on the mechanical seal water collection branch line and are interrelated. The branch line water quality monitoring component includes a branch line conductivity monitor 15. When the branch line water quality monitoring component detects that the water quality of the corresponding mechanical seal water collection branch line is unqualified, the branch line regulating valve 16 is automatically closed to prevent the mechanical seal water with unqualified water quality from entering the desalted water production system.

[0037] The mechanical seal water recycling device may also include a main pipe water quality monitoring component and a main pipe cut-off valve arranged on the mechanical seal water delivery main pipe 2. The main pipe water quality monitoring component includes a main pipe conductivity monitor 21 and a main pipe ORP monitor 22. When the main pipe water quality monitoring component detects that the water quality on the mechanical seal water collection main pipe is unqualified (either conductivity or ORP is unqualified), the main pipe cut-off valve is automatically closed to prevent mechanical seal water with unqualified water quality from entering the desalted water production system.

[0038] The machine seal water recycling device may also include a drain pipe 24 provided with a drain valve 23, one end of the drain pipe 24 is connected to the machine seal water delivery main pipe 2, and the other end is connected to the ditch 3. Preferably, in this embodiment, the drain valve 23 and the main pipe cut-off valve are both associated with the main pipe water quality monitoring component. When the main pipe water quality monitoring component detects that the water quality on the machine seal water collection main pipe is unqualified (either conductivity or ORP is unqualified), the main pipe cut-off valve is automatically closed and the drain valve 23 is opened to discharge the machine seal water with unqualified water quality to the sewage network, so as to prevent the machine seal water with unqualified water quality from entering the desalted water production system. After the water quality is qualified, it is switched back to the desalted water production system.

[0039] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may be subject to various modifications and variations. In the absence of conflicts, the embodiments of the present application and the features in the embodiments may be combined with each other at will. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A mechanical seal water recycling device, characterized in that: include: A machine sealing water collecting branch line, wherein a plurality of the machine sealing water collecting branch lines are arranged in parallel, and each of the machine sealing water collecting branch lines is used to collect the machine sealing water discharged from the corresponding section of the chlor-alkali production device; The main pipe for conveying sealing water has its inlet connected to the outlet of the branch line for collecting sealing water, and its outlet is connected to the desalted water production system after merging with the process condensed water.

2. The mechanical seal water recycling device according to claim 1, characterized in that: The chlor-alkali production device comprises a brine concentration section, a primary brine section, a chlorine-hydrogen waste gas treatment section, a secondary brine section and a 50% alkali evaporation section.

3. The mechanical seal water recycling device according to claim 1, characterized in that: The mechanical seal water collecting branch line comprises a mechanical seal water collecting container, a mechanical seal water suction pipe, a mechanical seal water delivery pump and a mechanical seal water delivery branch pipe which are connected in sequence; the mechanical seal water delivery branch pipe is connected to the mechanical seal water delivery main pipe.

4. The mechanical seal water recycling device according to claim 1, characterized in that: It also includes a branch line water quality monitoring component and a branch line regulating valve which are arranged on the machine seal water collection branch line and are related to each other.

5. The mechanical seal water recycling device according to claim 4, characterized in that: The branch line water quality monitoring component includes a branch line conductivity monitor.

6. The mechanical seal water recycling device according to any one of claims 1 to 5, characterized in that: It also includes a main pipe water quality monitoring component and a main pipe cut-off valve which are arranged on the mechanical seal water delivery main pipe and are related to each other.

7. The mechanical seal water recycling device according to claim 6, characterized in that: The main pipe water quality monitoring component includes a main pipe conductivity monitor.

8. The mechanical seal water recycling device according to claim 6, characterized in that: The main pipe water quality monitoring component includes a main pipe ORP monitor.

9. The mechanical seal water recycling device according to claim 6, characterized in that: Also included is a sewage pipe provided with a sewage valve.

10. The mechanical seal water recycling device according to claim 9, characterized in that: The drain valve is associated with the main pipe water quality monitoring component.

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