System for recycling concentrated water of desalting water station by using deoxygenated steam used by boiler

Abstract

The utility model provides a system for recovering concentrated water of a demineralized water station by using boiler self-use deoxygenated steam, particle impurities in the concentrated water of the demineralized water station are removed through a water filter, an outlet of the water filter is connected with a heater, and the deoxygenated steam in a boiler self-use deoxygenated steam header pipe is introduced into the heater through a heating steam pipe for the heater. The outlet of the heater is connected with an enthalpy increasing device after passing through a booster pump, the water is heated into steam by deoxygenated steam, and the outlet of the enthalpy increasing device is connected with a steam pressure stabilizing filter, so that salt particles in the steam are removed, and the steam pressure is buffered; qualified steam is finally externally supplied to a deaerator for deoxidizing. The whole system is flexible to work and high in applicability, valuable water resources are recycled, meanwhile, heat energy is not wasted, larger economic benefits can be brought, and harmless, recycling and economical treatment of concentrated water of the desalting water station is achieved.

Description

Technical Field

[0001] This utility model belongs to the field of water resource recycling and treatment technology, and relates to a system for recycling concentrated water from desalination plants. Background Technology

[0002] As an important auxiliary facility for boiler rooms and power plants, demineralized water plants are generating high-salinity wastewater that is increasingly attracting attention. Typically, producing 1 ton of demineralized water produces 0.6 tons of concentrated wastewater, a very large output. However, currently, most power plants in China discharge this concentrated wastewater into the plant's sewage network, which not only increases the difficulty of wastewater treatment but also wastes valuable water resources.

[0003] Currently, reverse osmosis membrane method-evaporation concentration method or point-through osmosis method are commonly used to treat concentrated water from demineralized water plants. This method is not only costly and slow, but also has a complex and inflexible recovery system. It can only solve the pollution problem of concentrated water and focuses on solving local problems, which has certain limitations. It cannot treat concentrated water in a harmless, resource-efficient and economical way, and cannot achieve the optimal treatment of concentrated water from demineralized water plants. Utility Model Content

[0004] To address the problems of complex, inflexible, and incapable harmless, resource-efficient, and economical treatment of concentrated water from demineralized water stations as described in the background art, this utility model proposes a system for recovering concentrated water from demineralized water stations using boiler-used deaeration steam.

[0005] The system of this utility model includes a concentrate pipeline, a concentrate pump installed on the concentrate pipeline, and the outlet of the concentrate pump connected to a water filter for removing particulate impurities; the outlet of the water filter connected to a heater; the inlet of the heater connected to a heater steam pipe, which is connected to the boiler's own deaeration steam main; a heater drain pipe at the bottom of the heater and a heater vent pipe at the top of the heater; the outlet of the heater connected to an enthalpy enhancement device via a booster pump and pipeline; the inlet of the enthalpy enhancement device connected to an enthalpy enhancement device steam pipe, which is connected to the boiler's own deaeration steam main; the outlet of the enthalpy enhancement device connected to a steam pressure stabilizing filter; a steam outlet pipe at the top of the steam pressure stabilizing filter; and qualified steam from the steam outlet pipe supplied to the deaerator for deaeration.

[0006] Furthermore, the water filter includes a primary water filter and a secondary water filter connected in series.

[0007] Furthermore, the primary water filter is internally equipped with a corrosion-resistant stainless steel filter screen for removing large particulate impurities from the concentrated water.

[0008] Furthermore, the secondary water filter is internally equipped with an adsorbent for removing small particulate impurities from the concentrated water.

[0009] Furthermore, the heater has a nozzle for the filtered concentrated water at the top inside, and a heating mechanism is installed inside the heater.

[0010] Furthermore, the enthalpy-increasing device is equipped with an ejector mechanism for fully mixing and heating the deoxygenated steam and water.

[0011] Furthermore, the steam pressure stabilizing filter is equipped with a louver separation mechanism.

[0012] Furthermore, the steam pressure stabilizing filter is equipped with a nano-adsorption mechanism.

[0013] Currently, deoxygenated steam typically requires desuperheating and depressurization before being transported to the deaerator for deoxygenation. This process necessitates the use of boiler feedwater for desuperheating. Therefore, this invention proposes a new solution: using concentrated water from the demineralized water station instead of boiler feedwater for desuperheating. This achieves desuperheating of the deoxygenated steam while simultaneously recovering the concentrated water from the demineralized water station. The concentrated water from the demineralized water station passes through a water filter to remove particulate impurities. The outlet of the water filter is connected to a heater. Deoxygenated steam from the boiler's own deoxygenated steam main is introduced into the heater through a heated steam pipe to remove volatile gases. Sedimentary impurities are periodically discharged from the bottom of the heater through a heater drain pipe. The heater outlet is connected to an enthalpy-increasing device via a booster pump. The deoxygenated steam heats the water into steam. The outlet of the enthalpy-increasing device is connected to a steam pressure-stabilizing filter to remove salt particles from the steam and buffer the steam pressure. The qualified steam is finally supplied to the deaerator for deoxygenation.

[0014] Compared with the prior art, this utility model has the following advantages: (1) It does not use chemical agents and does not produce secondary pollution, and has the characteristics of energy saving and environmental protection; (2) The recovered concentrated salt can be sold to recyclers as medicine, which is highly economical; (3) The filter is easy to clean and has low operating costs.

[0015] In summary, the system of this utility model achieves deoxygenation steam decooling while recovering concentrated water from the demineralized water station. The entire system is flexible in operation and highly applicable. While recovering concentrated water from the demineralized water station, the system does not require additional energy. It utilizes the steam originally used for deoxygenation, recovers valuable water resources without wasting heat energy, and can bring greater economic benefits. It realizes the harmless, resource-based, and economical treatment of concentrated water from the demineralized water station. Attached Figure Description

[0016] Figure 1 A schematic diagram of a system for recovering concentrated wastewater from a demineralized water station.

[0017] Explanation of reference numerals in the attached diagram: 1-Concentrate pump; 2-Concentrate pipeline; 3-First-stage water filter; 4-First-stage filtered water pipeline; 5-Second-stage water filter; 6-Second-stage filtered water pipeline; 7-Heater; 8-Heating steam pipe for heater; 9-Heater drain pipe; 10-Heat vent pipe for heater; 11-Booster pump; 12-Booster outlet pipe; 13-Enthalpy enhancement device; 14-Enthalpy enhancement device outlet pipe; 15-Steam pressure stabilizing filter; 16-Steam outlet pipe of steam pressure stabilizing filter; 17-Boiler self-use deaerator steam main pipe; 18-Heating steam pipe for enthalpy enhancement device. Detailed Implementation

[0018] To make the technical problem to be solved, the technical solution, and the beneficial effects of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of this application and are not intended to limit the scope of this application. The positional relationships described in the embodiments are consistent with those shown in the accompanying drawings.

[0019] A system for recovering concentrated water from a demineralized water station using boiler-used deaerator steam, such as... Figure 1 As shown.

[0020] The concentrated water from the demineralized water station first enters the concentrated water pipeline 2. A concentrated water pump 1 is installed on the concentrated water pipeline 2, and the concentrated water from the demineralized water station is pumped into a water filter to remove particulate impurities. Specifically, in this embodiment, the water filter consists of a primary water filter 3 and a secondary water filter 5 connected in series. The primary water filter 3 is equipped with a corrosion-resistant stainless steel filter screen to remove large particulate impurities from the concentrated water. The outlet of the primary water filter 3 flows through a primary filtered water pipeline 4 to the secondary water filter 5. The secondary water filter 5 is equipped with an adsorbent to remove small particulate impurities from the concentrated water. The outlet of the secondary water filter 5 is connected to a heater 7 through a secondary filtered water pipeline 6.

[0021] The heater 7 has a nozzle for the filtered concentrated water at the top inside, a heating mechanism inside, and a heating steam pipe 8 connected to the inlet of the heater 7. The heating steam pipe 8 is connected to the boiler's own deaeration steam main pipe 17. The deaeration steam is introduced into the heater 7 to remove volatile gases. The heater 7 has a heater drain pipe 9 at the bottom to periodically remove sediment and impurities. The heater 7 has a heater vent pipe 10 at the top.

[0022] The heater 7 outlet is connected to the booster pump 11, which is equipped with a booster outlet pipe 12. The booster outlet pipe 12 is connected to the enthalpy enhancement device 13, and the inlet of the enthalpy enhancement device 13 is connected to the heating steam pipe 18 for the enthalpy enhancement device. The heating steam pipe 18 for the enthalpy enhancement device is connected to the boiler's own deaerator steam main pipe 17. The enthalpy enhancement device 13 is equipped with an ejector mechanism for fully mixing and heating the deaerator steam with water.

[0023] In other words, such as Figure 1 As shown, the boiler's self-use deaerator steam main 17 is provided with two branches: one branch is the heating steam pipe 8 for the heater, and the other branch is the heating steam pipe 18 for the enthalpy enhancement device.

[0024] The enthalpy enhancement device 13 is connected to the steam pressure stabilizing filter 15 through the enthalpy enhancement device outlet pipe 14. Specifically, the steam pressure stabilizing filter 15 is equipped with a louvered separation mechanism and a nano-adsorption mechanism to remove salt particles from the steam and buffer the steam pressure. A steam outlet pipe 16 is provided at the top of the steam pressure stabilizing filter 15. After the steam from the steam outlet pipe 16 is qualified, it is supplied to the deaerator for deoxygenation.

[0025] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings and specific examples. However, the present invention is not limited to the specific details in the above embodiments. Within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solution of the present invention, and these simple modifications all fall within the protection scope of the present invention.

Claims

1. A system for recovering concentrated water from a brine plant using boiler service deaerated steam, comprising a concentrated water conduit (2), characterized in that: The concentrated water pipeline (2) is provided with a concentrated water pump (1), the outlet of the concentrated water pump (1) is connected to a water filter for removing particulate impurities; the outlet of the water filter is connected to a heater (7); the inlet of the heater (7) is connected to a heater heating steam pipe (8), the heater heating steam pipe (8) is connected to a boiler self-use deoxygenated steam main pipe (17), the bottom of the heater (7) is provided with a heater blowdown pipe (9), the top of the heater (7) is provided with a heater gas discharge pipe (10); the outlet of the heater (7) is connected to an enthalpy increasing device (13) through a booster pump (11) and a pipeline; the inlet of the enthalpy increasing device (13) is connected to an enthalpy increasing device heating steam pipe (18), the enthalpy increasing device heating steam pipe (18) is connected to the boiler self-use deoxygenated steam main pipe (17), the outlet of the enthalpy increasing device (13) is connected to a steam pressure stabilizing filter (15), the top of the steam pressure stabilizing filter (15) is provided with a steam outlet pipe (16), and the steam of the steam outlet pipe (16) is qualified and supplied to a deoxygenator for deoxygenation.

2. The system for recovering concentrated water from a boiler feed water station using boiler service deaerated steam according to claim 1, characterized in that: The water filter comprises a primary water filter (3) and a secondary water filter (5) connected in series.

3. The system for recovering concentrated water from a boiler feed water plant using boiler service deaerated steam according to claim 2, wherein: The inside of the primary water filter (3) is provided with a corrosion-resistant stainless steel filter screen for removing large particulate impurities in the concentrated water.

4. The system for recovering concentrated water from a boiler feed water plant using boiler service deaerated steam according to claim 3, wherein: The inside of the secondary water filter (5) is provided with an adsorbent for removing small particulate impurities in the concentrated water.

5. The system for recovering concentrated water from a boiler feed water station using boiler service deaerated steam according to any one of claims 1 to 4, characterized in that: The inside top of the heater (7) is provided with a nozzle for filtered concentrated water, and the inside of the heater (7) is provided with a heating mechanism.

6. The system for recovering concentrated water from a boiler feed water plant using boiler service deaerated steam according to claim 5, wherein: The enthalpy increasing device (13) is provided with an injection mechanism for fully mixing and heating the deoxygenated steam and water.

7. The system for recovering concentrated water from a boiler feed water plant using boiler service deaerated steam according to claim 1, wherein: The steam pressure stabilizing filter (15) is provided with a louver separation mechanism.

8. The system for recovering concentrated water from a boiler feed water plant using boiler service deaerated steam according to claim 7, wherein: The steam pressure stabilizing filter (15) is provided with a nano adsorption mechanism.

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