Reverse osmosis treatment equipment for salt-making condensate water

Abstract

The utility model discloses reverse osmosis treatment equipment for salt-making condensate water, which solves the problems of environmental pollution and energy waste in the traditional condensate water treatment method, and comprises a pretreatment system, a reverse osmosis system and an ion exchange system, the pretreatment system comprises a raw water tank, a raw water pump, a multi-medium filter, a first dosing tank, an ultrafiltration system and a security filter which are sequentially communicated through a pipeline, an outlet of the security filter is connected with a reverse osmosis system, and an outlet of the reverse osmosis system is connected with a fresh water tank and a backwashing water tank respectively; an outlet of the backwashing water tank is connected with a backwashing water pump, the backwashing water pump is connected with the ultrafiltration system, and an outlet of the fresh water tank is connected with an ion exchange system. According to the utility model, condensate water is treated by a reverse osmosis technology, so that effective utilization of wastewater is realized, and environmental pollution is reduced; meanwhile, waste heat of condensate water is used for heat exchange, and the energy utilization efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of process wastewater treatment, in particular to a reverse osmosis treatment device for salt-making condensate water. Background Art

[0002] Energy conservation and emission reduction have become the focus of today's enterprise independent innovation and development, and water resources are an indispensable part of them. Especially for the salt-making industry, there is a large amount of wastewater such as condensate water and cooling water in the park that cannot be effectively utilized, and on the other hand, a certain amount of supplementary water is required. Since the condensate water contains a large amount of sodium ions, potassium ions and chloride ions, it will pollute the soil and river channels, cause the salinity of the river water to be too high, cause soil salinization, and the physical and chemical properties to change. At the same time, the waste heat of the condensate water will also cause thermal pollution, affecting the ecological environment and agricultural development.

[0003] To solve the above problems, the industry has begun to seek more environmentally friendly and energy-saving condensate water treatment methods. Among them, reverse osmosis technology has been widely used in the water treatment field due to its high efficiency and energy-saving characteristics. Therefore, it is of great practical significance to develop a device that can efficiently treat salt-making condensate water and make full use of its value. Summary of the Utility Model

[0004] The utility model provides a reverse osmosis treatment device for salt-making condensate water to solve the technical problems of environmental pollution and energy waste existing in the traditional condensate water treatment method.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A reverse osmosis treatment device for salt-making condensate water provided by the present application includes a pretreatment system, a reverse osmosis system, and an ion exchange system. Among them, the pretreatment system includes a raw water tank, a multi-media filter, and an ultrafiltration system connected in sequence through pipelines. The raw water tank is connected to the multi-media filter through a pipeline, and a raw water pump is connected between the raw water tank and the multi-media filter. The multi-media filter is connected to the ultrafiltration system through a pipeline, and a first chemical dosing tank is provided between the multi-media filter and the ultrafiltration system. The first chemical dosing tank is used to add bactericides and coagulants to the condensate water;

[0007] The ultrafiltration system is connected to the security filter through a pipeline. A second chemical dosing tank is provided between the ultrafiltration system and the security filter. Acid and scale inhibitor are added to the second chemical dosing tank. The outlet of the security filter is connected to a high-pressure water pump, and the high-pressure water pump is connected to the reverse osmosis system. The outlet of the reverse osmosis system is respectively connected to a fresh water tank and a backwash water tank. The outlet of the backwash water tank is connected to a backwash water pump, and the backwash water pump is connected to the ultrafiltration system. The first outlet of the fresh water tank is connected to the municipal water network, and the second outlet of the fresh water tank is connected to the ion exchange system. The reverse osmosis water is transported to the ion exchange system for ion exchange, and the produced water meets the standards and is used in the power plant boiler.

[0008] Further, valves are provided between the reverse osmosis system and the fresh water tank, and between the fresh water tank and the ion exchange system.

[0009] Further, the main material of the security filter is made of stainless steel, and 5μm polypropylene filter elements are installed inside.

[0010] Further, a heat exchanger is provided at the inlet of the raw water tank. The heat exchanger is connected to the raw water tank through a pipeline. Before pretreatment, the condensed water evaporated from salt production is sent from the condensed water storage tank to the hot side of the heat exchanger by a condensate water pump, and exchanges heat reversely with the primary water on the cold side.

[0011] Further, the heat exchanger is a plate heat exchanger.

[0012] The beneficial effects achieved by the present utility model:

[0013] (1) The salt production condensed water reverse osmosis treatment equipment provided by the present utility model, in the process of treating saline water, the reverse osmosis equipment mainly serves as a pre-desalination means, and the ion exchange device serves as a deep treatment device. Most of the salt content in the water is removed by reverse osmosis, and a small amount of salt is further removed by ion exchange. As a result, the working load of the ion exchange bed is greatly reduced, and the operation cycle is extended by dozens of times, making the entire water treatment system have good adaptability, stable operation, and economic rationality. Using the separation characteristics of the reverse osmosis membrane, dissolved salts in the water can be effectively removed, and at the same time, impurities such as colloids, organic matters, bacteria, and microorganisms can be removed. Using the combined process of reverse osmosis and ion exchange to treat the saline condensed water of the vacuum salt production device has significant economic and social benefits.

[0014] (2) The salt production condensed water reverse osmosis treatment equipment provided by the present utility model realizes the effective utilization of wastewater by treating the condensed water through reverse osmosis technology, reducing environmental pollution; at the same time, using the waste heat of the condensed water for heat exchange improves the energy utilization efficiency. Description of the Drawings

[0015] Figure 1 It is the process flow diagram of the embodiment of the present utility model;

[0016] Reference numerals:

[0017] 1, heat exchanger; 2, condensate pump; 3, raw water tank; 4, raw water pump; 5, multi-media filter; 6, first chemical dosing tank; 7, ultrafiltration system; 8, second chemical dosing tank; 9, security filter; 10, high-pressure water pump; 11, reverse osmosis system; 12, fresh water tank; 13, backwash water tank; 14, backwash water pump; 15, ion exchange system.

[0018] The attached drawings are only for illustrative purposes and should not be construed as a limitation of this patent; for better illustration of this embodiment, some components in the attached drawings will be omitted, enlarged or reduced, which does not represent the dimensions of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the attached drawings may be omitted; the same or similar reference numerals correspond to the same or similar components; the terms describing the positional relationship in the attached drawings are only for illustrative purposes and should not be construed as a limitation of this patent. Detailed implementation manners

[0019] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the attached drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement it. When the combination of the technical solutions appears to be contradictory or unable to be implemented, it should be considered that such a combination of the technical solutions does not exist and is not within the protection scope required by the present invention.

[0020] The technical solutions of the present invention will be described in detail below with reference to the specific attached drawings.

[0021] As Figure 1 shown, a reverse osmosis treatment device for salt-making condensate water includes a pretreatment system, a reverse osmosis system, and an ion exchange system. The pretreatment system includes a raw water tank 3, a multi-media filter 5, and an ultrafiltration system 7 that are connected in sequence through pipelines. The raw water tank 3 is connected to the multi-media filter 5 through a pipeline, and a raw water pump 4 is connected between the raw water tank 3 and the multi-media filter 5. The multi-media filter 5 is connected to the ultrafiltration system 7 through a pipeline, and a first chemical dosing tank 6 is provided between the multi-media filter 5 and the ultrafiltration system 7. The first chemical dosing tank 6 is used to add bactericides and coagulants to the condensate water;

[0022] The ultrafiltration system 7 is connected to the security filter 9 through a pipeline. A second chemical dosing tank 8 is provided between the ultrafiltration system 7 and the security filter 9. Acid and scale inhibitor are added to the second chemical dosing tank 8. The outlet of the security filter 9 is connected to a high-pressure water pump 10, and the high-pressure water pump 10 is connected to a reverse osmosis system 11. The outlet of the reverse osmosis system 11 is respectively connected to a fresh water tank 12 and a backwash water tank 13. The outlet of the backwash water tank 13 is connected to a backwash water pump 14, and the backwash water pump 14 is connected to the ultrafiltration system 7. The first outlet of the fresh water tank 12 is connected to the municipal water network, and the second outlet of the fresh water tank is connected to an ion exchange system 15 to transport the reverse osmosis water to the ion exchange system 15 for ion exchange, and the produced water meets the standards for use in the power plant boiler.

[0023] After using the reverse osmosis technology, the degree of automated operation is improved, the operation cycle of the whole system is extended, and the consumption of acid and alkali, resin replacement, and equipment maintenance in the post-treatment processes such as ion exchange are reduced.

[0024] In a specific embodiment, valves are provided between the reverse osmosis system 11 and the fresh water tank 12, and between the fresh water tank 12 and the ion exchange system 15.

[0025] In order to further improve the operation efficiency and safety of the equipment, the main material of the security filter 9 is made of stainless steel, and 5μm polypropylene filter elements are installed inside to remove tiny impurities in the influent water to prevent contamination of the reverse osmosis membrane. The 5μm security filter is the last protection device before the raw water enters the reverse osmosis. It can filter and remove extremely tiny particulate matters still existing in the water to prevent the reverse osmosis membrane from being scratched by these particulate matters and causing permanent damage. At the same time, scale inhibitor is added before the security filter to ensure that no scale forms in the reverse osmosis system, protect the reverse osmosis membrane, and extend the service life of the reverse osmosis membrane.

[0026] In a specific embodiment, a heat exchanger 1 is provided at the inlet of the raw water tank 3. The heat exchanger 1 is connected to the raw water tank 2 through a pipeline. Before pretreatment, the condensate water evaporated from salt production is sent from the condensate water storage tank to the hot side of the heat exchanger through a condensate water pump 2 for countercurrent heat exchange with the primary water on the cold side, and is discharged after heat recovery; the heat exchanger 1 is a plate heat exchanger.

[0027] The pretreatment of the condensate water is mainly a system designed to ensure the normal and long-term operation of the main reverse osmosis treatment system. The role of the pretreatment is to preliminarily treat the raw water and remove suspended substances and colloidal substances in the water to protect the stable operation of the reverse osmosis equipment.

[0028] The reverse osmosis treatment system is the core part of reverse osmosis treatment. The reverse osmosis system is the core part of the pre-desalination of this equipment. The water treated by reverse osmosis can remove most of the inorganic salts, bacteria, organic matters, and microorganisms. It also includes a post-backwashing device, whose main purpose is to chemically clean the reverse osmosis system when the reverse osmosis membrane surface is contaminated. At the same time, during normal operation, it is used for flushing to wash away some deposits on the membrane surface, restore the compacted membrane, recover the performance of the membrane, increase the water production, and extend the service life of the membrane. The chemical cleaning device of the reverse osmosis system consists of a cleaning medicine tank, a cleaning pump, a 5μm security filter, and connecting pipe valves. When the membrane module is contaminated, it can be used to chemically clean the reverse osmosis system to ensure the long-term stable operation of the membrane and reduce the operation cost.

[0029] The serial numbers of the embodiments of the present application above are only for description and do not represent the superiority or inferiority of the embodiments. The above are only the preferred embodiments of the present application and do not limit the patent scope of the present application accordingly. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present application, or directly or indirectly applied in other related technical fields, shall be included in the patent protection scope of the present application by the same token.

Claims

1. A reverse osmosis treatment device for salt-making condensate water, characterized in that, It includes a pretreatment system, a reverse osmosis system, and an ion exchange system. Among them, the pretreatment system includes a raw water tank (3), a multi-media filter (5), and an ultrafiltration system (7) connected in sequence through pipelines. The raw water tank (3) is connected to the multi-media filter (5) through a pipeline. A raw water pump (4) is connected between the raw water tank (3) and the multi-media filter (5). The multi-media filter (5) is connected to the ultrafiltration system (7) through a pipeline. A first chemical dosing tank (6) is provided between the multi-media filter (5) and the ultrafiltration system (7). The first chemical dosing tank (6) is used to add bactericide and coagulant to the condensate water. The ultrafiltration system (7) is connected to a security filter (9) through a pipeline. A second chemical dosing tank (8) is provided between the ultrafiltration system (7) and the security filter (9). Acid and scale inhibitor are added to the second chemical dosing tank (8). The outlet of the security filter (9) is connected to a high-pressure water pump (10). The high-pressure water pump (10) is connected to the reverse osmosis system (11). The outlet of the reverse osmosis system (11) is respectively connected to a fresh water tank (12) and a backwash water tank (13). The outlet of the backwash water tank (13) is connected to a backwash water pump (14). The backwash water pump (14) is connected to the ultrafiltration system (7). The first outlet of the fresh water tank (12) is connected to the municipal water network. The second outlet of the fresh water tank is connected to the ion exchange system (15). The reverse osmosis water is transported to the ion exchange system (15) for ion exchange, and the produced water meets the standards and is used in the power plant boiler.

2. The reverse osmosis treatment device for salt-making condensate water according to claim 1, characterized in that, Valves are provided between the reverse osmosis system (11) and the fresh water tank (12), and between the fresh water tank (12) and the ion exchange system (15).

3. The reverse osmosis treatment equipment for salt-making condensate water according to claim 1, characterized in that, The main material of the security filter (9) is made of stainless steel, and it is equipped with 5μm polypropylene filter elements inside.

4. A reverse osmosis treatment device for salt-making condensate water according to claim 1, characterized in that, A heat exchanger (1) is provided at the inlet of the raw water tank (3). The heat exchanger (1) is connected to the raw water tank (3) through a pipeline. Before pretreatment, the condensate water evaporated from salt production is sent from the condensate storage tank to the hot side of the heat exchanger through a condensate water pump (2) for countercurrent heat exchange with the primary water on the cold side.

5. A reverse osmosis treatment device for salt-making condensate water according to claim 4, characterized in that, The heat exchanger (1) is a plate heat exchanger.

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