Chemical condensate water recovery system

Abstract

The utility model provides a chemical condensed water recovery system, which belongs to the technical field of energy conservation and comprises a chemical condensed water pipeline, an external production water supply pipeline, an ultrafiltration device, a reverse osmosis system and a desalination system, the ultrafiltration device, the reverse osmosis system and the desalination system are sequentially communicated from front to back, the external production water supply pipeline is communicated with the ultrafiltration device, and the chemical condensed water pipeline is communicated with the reverse osmosis system. According to the utility model, chemical condensed water is merged into an original external supply production water treatment system through the chemical condensed water pipeline, reverse osmosis filtration treatment and desalination treatment are carried out on the chemical condensed water, and the chemical condensed water is treated into qualified chemical circulating water for recycling, so that the water resource is saved, and the chemical water cost is also reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of energy conservation, and relates to a chemical condensate water recovery technology, in particular to a chemical condensate water recovery system. Background Art

[0002] Chemical condensate refers to condensate produced in the chemical production process. Since chemical condensate is salt water (containing iron salts, aluminum salts, silicon dioxide and other substances), the existing method for treating chemical condensate is to discharge chemical condensate together with other chemical wastewater into the municipal pipe network system and treat it as sewage. Referring to the patent document with application number CN201811252137.0, it discloses an efficient treatment method for polyvinyl alcohol wastewater, and the corresponding steps of the treatment method are: A. Cool the polyvinyl alcohol wastewater to below 50°C, prepare a solution containing sodium sulfate and potassium citrate at a temperature of 30-40°C, and prepare a polyacrylamide solution at room temperature; B. Mix the polyvinyl alcohol wastewater and the solution containing sodium sulfate and potassium citrate in a mixer, and add the polyacrylamide solution after 50-70 minutes for mixing; C. Let the mixed solution obtained in step B fall from the mixer into the sedimentation tank for sedimentation, and then discharge the obtained supernatant into the effluent monitoring tank or into the municipal pipe network, and the precipitate at the bottom of the sedimentation tank enters the sieve plate separator for solid-liquid separation, and the separated solid enters the recovery PVA salvage and drying treatment device for treatment, and the separated liquid enters the effluent monitoring tank or returns to the wastewater regulating tank for treatment. This patent document is to discharge the chemical wastewater into the municipal pipe network after treatment, and then treat it again through the municipal pipe network. Since chemical condensate can be reused as circulating water after treatment, if it is directly discharged into the municipal pipeline as chemical wastewater, it will cause waste of water resources and increase chemical water costs. Utility Model Content

[0003] In view of the technical problem described above, in the prior art, directly discharging chemical condensate water as chemical wastewater into the municipal pipe network will cause waste of water resources and increase the cost of chemical water. The utility model proposes a chemical condensate water recovery system.

[0004] The utility model incorporates chemical condensed water into a chemical water treatment system for treatment (filtration, desalination) and then recycles it as chemical process circulating water, thereby saving water resources and reducing chemical water costs.

[0005] The technical solution of the utility model is as follows:

[0006] The chemical condensate water recovery system comprises a chemical condensate water pipeline, an external production water pipeline, and an ultrafiltration device, a reverse osmosis system and a desalination system which are sequentially connected from front to back, wherein the external production water pipeline is connected to the ultrafiltration device, and the chemical condensate water pipeline is connected to the reverse osmosis system.

[0007] It is further defined that the reverse osmosis system includes a primary reverse osmosis system and a secondary reverse osmosis system, the ultrafiltration device is connected to the secondary reverse osmosis system through the primary reverse osmosis system, the secondary reverse osmosis system is connected to the desalination system, and the chemical condensate water pipeline is connected to the primary reverse osmosis system or the secondary reverse osmosis system.

[0008] It is further defined that the chemical condensate water pipeline includes a process condensate water pipeline, and the process condensate water pipeline is connected to the primary reverse osmosis system.

[0009] It is further defined that the chemical condensate water pipeline includes a steam condensate water main pipeline, and the steam condensate water main pipeline is connected to both the primary reverse osmosis system and the secondary reverse osmosis system.

[0010] It is further defined that the steam condensate main pipeline is connected to a first steam condensate branch pipeline and a second steam condensate branch pipeline, the steam condensate main pipeline is connected to a primary reverse osmosis system through the first steam condensate branch pipeline, and the steam condensate main pipeline is connected to a secondary reverse osmosis system through the second steam condensate branch pipeline.

[0011] It is further defined that a three-way valve is provided at the connection between the steam condensate main pipe, the first steam condensate branch pipe and the second steam condensate branch pipe, and the steam condensate main pipe is connected to the first steam condensate branch pipe or the second steam condensate branch pipe through the three-way valve.

[0012] It is further defined that an online silicon meter is provided on the steam condensate main pipeline.

[0013] It is further defined that a conductivity analyzer is also provided on the steam condensate main pipeline.

[0014] It is further defined that the desalination system is connected to a qualified desalted water pipeline.

[0015] It is further defined that regulating valves are provided on the chemical condensate water pipeline, the external production water pipeline and the qualified desalted water pipeline.

[0016] Compared with the prior art, the beneficial effects of the utility model are:

[0017] 1. The utility model proposes a chemical condensate water recovery system, which includes a chemical condensate water pipeline, an external production water pipeline, and an ultrafiltration device, a reverse osmosis system, and a desalination system connected in sequence from front to back. The utility model incorporates chemical condensate water into the original external production water treatment system through the chemical condensate water pipeline, performs reverse osmosis filtration and desalination treatment on the chemical condensate water, and processes the chemical condensate water into qualified chemical circulating water for recycling, thereby saving water resources and reducing the cost of chemical water.

[0018] 2. The reverse osmosis system of the utility model includes a primary reverse osmosis system and a secondary reverse osmosis system, through which chemical condensate water is subjected to two reverse osmosis filtrations, thereby improving the reverse osmosis filtration effect of the chemical condensate water.

[0019] 3. The chemical condensate water pipeline of the utility model includes a process condensate water pipeline and a steam condensate water main pipeline, through which the process condensate water and the steam condensate water can be recycled and utilized at the same time.

[0020] 4. In the utility model, a first steam condensate branch pipe and a second steam condensate branch pipe are connected to the steam condensate main pipe. The steam condensate in the steam condensate main pipe is passed to the primary reverse osmosis system through the first steam condensate branch pipe, and the steam condensate in the steam condensate main pipe is passed to the secondary reverse osmosis system through the second steam condensate branch pipe. The flow direction of the steam condensate in the steam condensate main pipe can be determined according to the conductivity (salt content) of the steam condensate in the steam condensate main pipe. The steam condensate with high conductivity (salt content) flows to the primary reverse osmosis system and is subjected to reverse osmosis filtration treatment through the primary reverse osmosis system and the secondary reverse osmosis system; the steam condensate with low conductivity (salt content) flows directly to the secondary reverse osmosis system and is subjected to reverse osmosis filtration treatment through the secondary reverse osmosis system, thereby reducing the load of the primary reverse osmosis system.

[0021] 5. The utility model arranges an online silicon meter and a conductivity analyzer on the steam condensate main pipeline, and realizes online detection of the salt content of the steam condensate in the steam condensate main pipeline through the online silicon meter and the conductivity analyzer, so that the on-site operator can directly adjust the reversing of the three-way valve according to the detection result. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the chemical condensate water recovery system of the utility model;

[0023] Among them, 1-external production water pipeline, 2-ultrafiltration device, 3-primary reverse osmosis system, 4-secondary reverse osmosis system, 5-desalting system, 6-qualified desalted water pipeline, 7-process condensate pipeline, 8-steam condensate main pipeline, 9-online silicon meter, 10-conductivity analyzer, 11-three-way valve, 12-first steam condensate branch pipeline, 13-second steam condensate branch pipeline. DETAILED DESCRIPTION

[0024] The technical solution of the present invention is further explained below in conjunction with the accompanying drawings and embodiments, but the present invention is not limited to the implementation methods described below.

[0025] Example 1

[0026] See also Figure 1 The chemical condensate water recovery system of this embodiment includes a chemical condensate water pipeline, an external production water pipeline 1, and an ultrafiltration device 2, a reverse osmosis system, and a desalination system 5 which are connected in sequence from front to back. The external production water pipeline 1 is connected to the ultrafiltration device 2, and the chemical condensate water pipeline is connected to the reverse osmosis system. Specifically, the water outlet of the external production water pipeline 1 is connected to the water inlet of the ultrafiltration device 2, the water outlet of the ultrafiltration device 2 is connected to the water inlet of the reverse osmosis system, the water outlet of the reverse osmosis system is connected to the desalination system 5, and the water outlet of the chemical condensate water pipeline is connected to the water inlet of the reverse osmosis system. The external production water pipeline is subjected to ultrafiltration treatment, reverse osmosis treatment, and desalination treatment in sequence by the ultrafiltration device 2, the reverse osmosis system, and the desalination system 5; the chemical condensate water is subjected to reverse osmosis treatment and desalination treatment in sequence by the reverse osmosis system and the desalination system 5.

[0027] The desalination system 5 of this embodiment is connected to a qualified desalination water pipeline 6. The water outlet of the desalination system 5 is connected to the qualified desalination water pipeline 6, and the qualified circulating water is discharged from the treatment system through the qualified desalination water pipeline 6 for subsequent use.

[0028] In this embodiment, chemical condensate water is incorporated into the original external production water treatment system through a chemical condensate water pipeline, and reverse osmosis filtration and desalination treatment are performed on the chemical condensate water, and the chemical condensate water is processed into qualified chemical circulating water for recycling, thereby saving water resources and reducing chemical water costs.

[0029] Preferably, in this embodiment, regulating valves are provided on the chemical condensate water pipeline, the external production water pipeline 1 and the qualified desalted water pipeline 6. The switch and flow of the chemical condensate water pipeline, the external production water pipeline 1 and the qualified desalted water pipeline 6 are regulated and controlled by the regulating valves.

[0030] Further preferably, in this embodiment, regulating valves are provided on the connecting pipe between the ultrafiltration device 2 and the reverse osmosis system and on the connecting pipe between the reverse osmosis system and the desalination system 5. The opening and closing and flow of the connecting pipe between the ultrafiltration device 2 and the reverse osmosis system and the connecting pipe between the reverse osmosis system and the desalination system 5 are regulated and controlled by the regulating valves.

[0031] Example 2

[0032] The chemical condensate water recovery system of this embodiment is based on the embodiment 1, and its reverse osmosis system includes a primary reverse osmosis system 3 and a secondary reverse osmosis system 4, the ultrafiltration device 2 is connected to the secondary reverse osmosis system 4 through the primary reverse osmosis system 3, the secondary reverse osmosis system 4 is connected to the desalination system 5, and the chemical condensate water pipeline is connected to the primary reverse osmosis system 3 or the secondary reverse osmosis system 4. Specifically, the water outlet of the ultrafiltration device 2 is connected to the water inlet of the primary reverse osmosis system 3, the water outlet of the primary reverse osmosis system 3 is connected to the water inlet of the secondary reverse osmosis system 4, the water outlet of the secondary reverse osmosis system 4 is connected to the water inlet of the desalination system 5, and the water outlet of the chemical condensate water pipeline is connected to the water inlet of the primary reverse osmosis system 3 or the water inlet of the secondary reverse osmosis system 4. The chemical condensate water is reverse osmosis filtered in turn by the primary reverse osmosis system 3 and the secondary reverse osmosis system 4, thereby improving the reverse osmosis filtration treatment effect of the chemical condensate water.

[0033] Example 3

[0034] The chemical condensate water recovery system of this embodiment is based on the embodiment 2, and its chemical condensate water pipeline includes a process condensate water pipeline 7, and the process condensate water pipeline 7 is connected with the primary reverse osmosis system 3. Specifically, the water outlet of the process condensate water pipeline 7 is connected with the water inlet of the primary reverse osmosis system 3, and the process condensate water is reverse osmosis filtered in turn by the primary reverse osmosis system 3 and the secondary reverse osmosis system 4, thereby improving the reverse osmosis filtration treatment effect of the chemical condensate water.

[0035] Example 4

[0036] The chemical condensate water recovery system of this embodiment is based on Embodiment 2 or 3, and its chemical condensate water pipeline includes a steam condensate water main pipeline 8, and the steam condensate water main pipeline 8 is connected to both the primary reverse osmosis system 3 and the secondary reverse osmosis system 4.

[0037] Preferably, the steam condensate main pipeline 8 is connected to a first steam condensate branch pipeline 12 and a second steam condensate branch pipeline 13. The steam condensate main pipeline 8 is connected to the primary reverse osmosis system 3 through the first steam condensate branch pipeline 12, and the steam condensate main pipeline 8 is connected to the secondary reverse osmosis system 4 through the second steam condensate branch pipeline 13.

[0038] Specifically, the water outlet of the steam condensate main pipe 8 is connected to the water inlet of the first steam condensate branch pipe 12 and the water inlet and outlet of the second steam condensate branch pipe 13. The water outlet of the first steam condensate branch pipe 12 is connected to the water inlet of the primary reverse osmosis system 3, and the water outlet of the second steam condensate branch pipe 13 is connected to the water inlet of the secondary reverse osmosis system 4.

[0039] A three-way valve 11 is provided at the connection between the steam condensate main pipeline 8, the first steam condensate branch pipeline 12 and the second steam condensate branch pipeline 13, and the steam condensate main pipeline 8 is connected with the first steam condensate branch pipeline 12 or the second steam condensate branch pipeline 13 through the three-way valve 11. Specifically, the water outlet of the steam condensate main pipeline 8 is connected with the water inlet of the three-way valve 11, and the water outlet of the three-way valve 11 is connected with the water outlet of the first steam condensate branch pipeline 12 or the water outlet of the second steam condensate branch pipeline 13.

[0040] Preferably, in this embodiment, regulating valves are provided on both the first steam condensate branch pipe 12 and the second steam condensate branch pipe 13, through which the switch and flow rate of the first steam condensate branch pipe 12 and the second steam condensate branch pipe 13 are adjusted and controlled.

[0041] In this embodiment, the steam condensate in the steam condensate main pipe 8 is passed to the primary reverse osmosis system 3 through the first steam condensate branch pipe 12, and the steam condensate in the steam condensate main pipe 8 is passed to the secondary reverse osmosis system 4 through the second steam condensate branch pipe 13. The flow direction of the steam condensate in the steam condensate main pipe 8 can be determined according to the conductivity (salt content) of the steam condensate in the steam condensate main pipe 8. The steam condensate with high conductivity (salt content) flows to the primary reverse osmosis system 3 through the first steam condensate branch pipe 12, and is subjected to reverse osmosis filtration treatment through the primary reverse osmosis system 3 and the secondary reverse osmosis system 4; the steam condensate with low conductivity (salt content) flows directly to the secondary reverse osmosis system 4 through the second steam condensate branch pipe 13, and is subjected to reverse osmosis filtration treatment through the secondary reverse osmosis system 4, thereby reducing the load of the primary reverse osmosis system 3.

[0042] In this embodiment, an online silicon meter 9 is provided on the steam condensate main pipeline 8 .

[0043] In this embodiment, a conductivity analyzer 10 is further provided on the steam condensate main pipeline 8 .

[0044] This embodiment realizes online detection of the salt content of steam condensate in the steam condensate main pipeline 8 through the online silicon meter 9 and the conductivity analyzer 10, so that the on-site operator can directly adjust the reversing direction of the three-way valve 11 according to the detection results to determine the flow direction of the steam condensate in the steam condensate main pipeline 8.

[0045] In this embodiment, a booster valve can be installed on any pipeline such as the external production water pipeline 1, the qualified desalted water pipeline 6, the process condensate water pipeline 7, the steam condensate main pipeline 8, the first steam condensate branch pipeline 12 and the second steam condensate branch pipeline 13 according to actual on-site needs.

Claims

1. Chemical condensate water recovery system, characterized in that: It comprises a chemical condensate water pipeline, an external production water pipeline (1), and an ultrafiltration device (2), a reverse osmosis system and a desalination system (5) which are connected in sequence from front to back, wherein the external production water pipeline (1) is connected to the ultrafiltration device (2), and the chemical condensate water pipeline is connected to the reverse osmosis system; The reverse osmosis system comprises a primary reverse osmosis system (3) and a secondary reverse osmosis system (4); the ultrafiltration device (2) is connected to the secondary reverse osmosis system (4) via the primary reverse osmosis system (3); the secondary reverse osmosis system (4) is connected to a desalination system (5); and the chemical condensate water pipeline is connected to the primary reverse osmosis system (3) or the secondary reverse osmosis system (4).

2. The chemical condensate water recovery system according to claim 1, characterized in that: The chemical condensate water pipeline comprises a process condensate water pipeline (7), and the process condensate water pipeline (7) is connected to the primary reverse osmosis system (3).

3. The chemical condensate water recovery system according to claim 1 or 2, characterized in that: The chemical condensate water pipeline comprises a steam condensate water main pipeline (8), and the steam condensate water main pipeline (8) is connected to both the primary reverse osmosis system (3) and the secondary reverse osmosis system (4).

4. The chemical condensate water recovery system according to claim 3, characterized in that: The steam condensate main pipeline (8) is connected to a first steam condensate branch pipeline (12) and a second steam condensate branch pipeline (13); the steam condensate main pipeline (8) is connected to a primary reverse osmosis system (3) via the first steam condensate branch pipeline (12); and the steam condensate main pipeline (8) is connected to a secondary reverse osmosis system (4) via the second steam condensate branch pipeline (13).

5. The chemical condensate water recovery system according to claim 4, characterized in that: A three-way valve (11) is provided at the connection between the steam condensate main pipeline (8), the first steam condensate branch pipeline (12) and the second steam condensate branch pipeline (13); the steam condensate main pipeline (8) is connected to the first steam condensate branch pipeline (12) or the second steam condensate branch pipeline (13) through the three-way valve (11).

6. The chemical condensate recovery system according to claim 5, characterized in that: An online silicon meter (9) is provided on the steam condensate main pipeline (8).

7. The chemical condensate water recovery system according to claim 6, characterized in that: The steam condensate main pipeline (8) is also provided with an electrical conductivity analyzer (10).

8. The chemical condensate water recovery system according to claim 1, characterized in that: The desalination system (5) is connected to a qualified desalted water pipeline (6).

9. The chemical condensate water recovery system according to claim 8, characterized in that: The chemical condensate water pipeline, the external production water pipeline (1) and the qualified desalted water pipeline (6) are all provided with regulating valves.

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