DUSHUK ENERGẎ EJECTOR DESALT SYSTEM

Abstract

Systems and methods for treating raw wastewater feed streams using a low-energy ejector acting as a heat pump to increase the pressure and temperature of a two-phase distillate stream, which is partly used to heat the raw wastewater feed stream. Systems and methods are used to treat raw wastewater feed streams. It uses heat from a liquid distillate stream and a concentrated liquid wastewater stream to preheat the wastewater feed stream and produce a liquid distillate product stream.

Description

1 TARIFF LOW ENERGY EJECTOR DESALT SYSTEM CROSS-REFERENCING OF RELEVANT APPLICATIONS This application is PCT Patent Application Serial No. 5, filed on 10 March 2020. U.S. Patent No. 11,097,203, which is U.S. National Stage Application PCT / US20 / 21906. the continuation of US Application No. 17 / 405755 filed on August 18, 2021 U.S. Temporary Application No. 63 / 248.175, filed on September 24, 2021, requesting priority. They claim priority rights and are referenced here, and in common They are allocated to Bechtel Energy Technologies & Solutions, Inc. 10 TECHNICAL FIELD The current explanation generally refers to seawater, manufactured water, and other high-salinity waters. It is related to the purification and desalination of nuclear wastewater; also to the treatment and evaporation of nuclear wastewater. It can also be applied to other treatment processes requiring base-based treatment. More specifically, existing The description refers to a static liquid-gas ejector (without moving parts) and a 15 in a water treatment system. Low-energy ejector desalination system utilizing maximum heat integration (LEEDS) It is related to its usage. PREVIOUS TECHNIQUE Thermal desalination processes that use steam as a heating medium utilize heat transfer through... It typically uses a steam conditioning system to extract heat from the existing steam. This 20 When processes use thermal or mechanical vapor compression, typically initiation and normalization occur. They need auxiliary steam to improve their operations. To improve operation and normal functioning, auxiliary steam is often used to produce steam. It requires a fossil fuel-fired boiler. The auxiliary steam boiler usually produces carbon monoxide. 25 resulting from the combustion of fossil fuels, which can contain nitrogen oxides and carbon dioxide. It will require an air emissions permit to address the emissions. It doesn't normally produce steam. facilities (such as LNG) or in environmentally sensitive areas or where obtaining air emission permits is difficult 2 It may be difficult to obtain permission for boilers for facilities located in other areas where the need for boilers exists. Eliminating it also has the advantage of preventing boiler fuel combustion and associated emissions. has. BRIEF DESCRIPTION OF THE FIGURE The current explanation is provided below, with reference to the attached figure, and here: 5 FIGURE 1 is a schematic showing an arrangement of a LEEDS process according to the current description. It is a diagram. DETAILED EXPLANATION OF THE SAMPLE LAYOUT The subject of the current statement has been specifically defined, but the statement itself... The intention is not to limit the scope of the statement. Therefore, the subject is current or future 10 similar and / or fewer than those described here in connection with other technologies. Structures can also be embodied in other ways, including steps and / or combinations. While the term "step" can be used to describe different elements of the methods employed here, Unless otherwise expressly restricted by the explanation, this term refers to the order described herein. 15 This should not be interpreted in any way. Other features and advantages of the explained regulations are detailed in the following figures and diagrams. Upon reviewing the detailed explanation, by someone with ordinary technical skills This will be seen. All these additional features and advantages are included within the scope of the described regulations. The aim is to... Furthermore, the figure shown is for illustrative purposes only and may vary. any 20 relating to the environment, architecture, design or process to which the regulations can be applied It is not intended to impose or imply any limitations. All flows described are physical lines. It is carried by. To the extent that temperature and pressure are referred to in the following description, this The terms are for illustrative purposes only and are not intended to limit the scope of the explanation. The current statement provides auxiliary steam to aid in initial or normal operations. by providing a process for treating and desalinating wastewater that does not require prior intervention, the previous 25 It overcomes one or more deficiencies in the technology, thus providing a boiler for auxiliary steam. It eliminates the need to use (and obtain air emission permits for) high salt content. Its ability to treat wastewater without requiring steam supplementation makes the process superior to conventional methods on the market. It is a fundamental component that distinguishes processes from each other. Processes also use pumps to transport flows. This allows for maximum utilization. These are basically static liquid-gas ejectors (movable 30 3 (not part of) use and maximum heat integration into the water treatment system. is carried out. In one regulation, the current description refers to a system for treating raw wastewater feed streams. The system includes the following: i) heating a wastewater stream and creating a two-phase flow. a heat exchanger for; ii) two-phase flow into a steam distillate stream and a concentrated liquid wastewater stream 5 iii) a column in contact with the fluid via a heat exchanger for separation; iii) vapor coming from the column An ejector column is used to produce a two-phase flow by combining the distillate stream and the liquid distillate stream. iv) an ejector in fluid contact; iv) a two-phase ejector in fluid contact with the ejector. a separator that separates the flow into another vapor distillate flow and a liquid distillate flow; v) liquid distillate A 10 that is in fluid communication with the ejector to send the flow as a propellant fluid to the ejector. pump; and vi) pump at least part of the concentrated liquid wastewater flow to the heat exchanger. another that is in fluid communication with the column and is positioned downwards from the column pump. In another arrangement, the current description refers to a treatment of the raw wastewater feed stream. The method includes the following: i) a wastewater treatment plant to create a two-phase flow. i) heating of the flow; ii) two-phase flow into a steam distillate flow and a concentrated liquid wastewater flow iii) separation of vapor distillate flow and liquid distillate flow by combining vapor distillate flow and liquid distillate flow iv) generating another two-phase flow with a temperature higher than the existing one; another two the separation of the phase flow into another vapor distillate flow and liquid distillate flow; and v) concentrated liquid Pumping at least a portion of the wastewater flow into the heat exchanger. 20 Referring to FIGURE 1 here, the system (100) uses salt water and / or high concentrations of salt water. which may include aqueous feed streams with or without suspended and / or dissolved solids, to process the feed stream of pre-treated or pre-conditioned raw wastewater (102) It is a low-energy ejector desalination system for raw wastewater feed flow (102) Pre-treatment or pre-conditioning prevents scaling in heat exchangers and other related equipment. 25 It minimizes corrosion. Pre-treatment or preconditioning involves chemical precipitation, coagulation, and Softening, descaling, and corrosion prevention through flocculation, precipitation, and ion exchange. to add chemicals, adjust pH, and prevent scaling and corrosion in related equipment. It may include other tools. Raw wastewater feed stream (102), heat is recovered from distillate and concentrate wastewater streams 30 to be recovered and to produce a heated aqueous feed stream (108) to the raw wastewater feed stream 4 (102) is sent to a heat exchanger system (104) to which it is transferred. The heated water feed flow (108), A concentrated liquid wastewater stream (112) coming out of an outlet under the column (122) is mixed with a Using a pump (126) to a falling film heat exchanger (116) placed inside the column (122) A pumpable mixed aqueous feed stream (114) is produced. Concentrated liquid wastewater stream (112) In addition, heat exchanger system (104) 5 to heat the raw wastewater feed stream (102). It can be pumped. When passing through the heat exchanger system (104), the concentrated liquid wastewater flow (112) It is cooled and becomes a liquid wastewater product stream (162) for collection. A stream which can be a valve regulator (110) heat exchanger of concentrated wastewater stream to heat the feed stream (102) It can be used to control the flow to the system (104). Mixed water feed stream (114), heating the mixed water feed stream (114) and two-phase mixed water 10 The hot steam distillate is distributed through a falling film heat exchanger (116) which forms the feed stream. After exiting the falling film heat exchanger (116), the two-phase mixed water feed in the column (122) It separates from the flow. The hot steam distillate is in the falling film heat exchanger (116) in the column (122). it collects on and hot steam distillate stream (132) as a column (122) at the top of the column (122) It exits from the outlet. Concentrated liquid wastewater, which may contain saline, hot steam distillate, falling film heat 15 from the two-phase mixed water feed stream in the column (122) after leaving the heat exchanger (116). It separates. The concentrated liquid wastewater is collected under the falling film heat exchanger (116) in the column (122). and the concentrated liquid wastewater stream (112) exits from the outlet below the column (122). The hot steam distillate stream (132) is drawn into an ejector (134) by suction and high The liquid distillate stream (142) is mixed with the fluid at temperature and compressed, and this fluid becomes a moving fluid 20 It functions as follows. Preferably, the ejector (134) is a static liquid-gas ejector (without a moving part (134) The ejector is at a temperature slightly higher than the hot steam distillate stream (132). It produces a two-phase distillate flow (136). The two-phase distillate flow (136) in the falling film heat exchanger (116) is sprayed into a separator (137). The separator (137) converts the two-phase distillate stream (136) into liquid distillate stream. (142) and separates into another stream of hot steam distillate (146). 25 The hot steam distillate stream (146) enters the hot side inlet of the falling film heat exchanger (116) and separates to heat the mixed water feed flow (114) distributed downwards between the heating elements and To create a two-phase mixed water feed flow, it flows upwards from separate heating elements. rises. Hot steam distillate flow (146) in the column (122) falling film heat exchanger (116) The hot steam from the two-phase mixed aqueous feed stream above it combines with the distillate and 30 The hot steam distillate stream (132) exits from the outlet at the top of the column (122). Liquid distillate The flow (142) falls downwards from the individual heating elements and near the bottom of the column (122). It exits from an outlet. The liquid distillate stream (142) is then sent to a distillate tank (138) where It is assembled and heated during the startup process. Liquid distillate flow (142) exits from an outlet at the bottom of the distillate tank (138) and is pumped by (140) It is pumped into the ejector (134) to function as a moving fluid. Liquid distillate When a portion of the flow (142) reaches a predetermined temperature and level, a pump (152) 5 using a heat exchanger system (104) to heat the raw wastewater feed stream (102) It is pumped. As it passes through the heat exchanger system (104), the liquid distillate stream (142) is cooled and It is converted into a liquid distillate product stream (156) to be collected. Another stream which can be a valve regulator (150) to heat the feed flow (102) from the distillate tank (138) of the liquid distillate flow (142). It can be used to control the current to the heat exchanger system (104). 10 Placement of the falling film heat exchanger (116) into the column (122) and the separator (137) falling Inclusion of a film heat exchanger (116) significantly reduces the area occupied by the system (100) and It further reduces heat loss. The column (122) also allows for the ventilation of non-condensing gases. It gives. The ejector (134), which operates as a heat pump, increases the pressure of the two-phase distillate flow (136) and It increases its temperature. This provides an additional heat contribution to the vapor compression evaporation process. 15 System (100) is unique, simple and environmentally friendly. System (100) reduces the raw wastewater feed flow. (102) heat from liquid distillate stream (142) and concentrated liquid wastewater stream (112) to heat. It is made more efficient by using. The system (100) also provides a value-added liquid distillate product flow. (156) and liquid wastewater product flow (162). Although the current statement is made in connection with the existing preferred arrangements, 20 experts in the field believe that the intention behind these regulations is not to limit the scope of explanation. This will be understood. In addition to wastewater treatment, LEEDS uses high-quality distilled or Demineralized water production involves reducing the volume of aqueous flows and using evaporation. other aqueous processes with high concentrations of suspended solids, such as product recovery It can also be applied to the treatment of flows. Therefore, the attached requirements and their equivalents are valid for 25 years. Without deviating from its spirit and scope, various alternatives are offered in the regulations described. It is thought that regulations and changes can be made.

Claims

6 REQUESTS 1. It is a system for treating raw wastewater feed streams and includes the following: A heat exchanger is used to heat a wastewater stream and create a two-phase flow; heat to separate the two-phase flow into a steam distillate stream and a concentrated liquid wastewater stream. a column in contact with fluid via a heat exchanger; An ejector combines the vapor distillate flow and the liquid distillate flow from the column, creating a two-phase system. An ejector is a fluid-communicating device that produces flow between the column and the ejector; The fluid is in contact with the ejector, and the ejector's two-phase flow is converted into another vapor distillate flow. and a separator that separates the liquid distillate stream, here the vapor distillate stream and the other one in question. The vapor distillate flow is in fluid contact; In fluid communication between the ejector and the liquid distillate stream, to send the liquid distillate flow to the ejector as a propellant. a pump; and to pump at least a portion of the concentrated liquid wastewater stream to the heat exchanger another that is in fluid contact with the column and is positioned downwards from the column pump.

2. The system is defined according to claim 1, where the column surrounds the heat exchanger and the separator.

3. The system is defined in accordance with Claim 1, whereby the raw wastewater feed flow, suspended solids It is a watery stream containing.

4. The system is as described in Claim 1, and also includes liquid distillate flow and concentrated liquid wastewater flow. using another heat exchanger or heat exchanger to heat the raw wastewater feed stream It includes the system.

5. The system is as described in claim 4, where the column is in fluid contact with the liquid distillate flow. It is in this state.

6. The system is as per claim 5, and also includes a column and ejector for collecting the liquid distillate flow. It includes a distillate tank in fluid communication.

7. The system is defined according to claim 2, where the heat exchanger is a falling film heat exchanger.

8. The system is defined in accordance with Claim 1, whereby the raw wastewater feed flow is treated with dissolved solids. It is a watery stream containing.

9. The system is in accordance with claim 4, and also involves another heat transfer of the concentrated liquid wastewater stream. It includes a current regulator to control the flow of heat to the heat exchanger or heat exchanger system.

10. The system is as described in Claim 4, and it also controls the flow of liquid distillate to the heat exchanger. It includes a current regulator for control purposes.

11. The system is defined according to claim 1, where the ejector is a static liquid-gas ejector.

12. This is a method for treating raw wastewater feed streams and includes the following: Heating a wastewater stream to create a two-phase flow; Separation of the two-phase flow into a vapor distillate stream and a concentrated liquid wastewater stream; by combining vapor distillate flow with liquid distillate flow, from the temperature of the vapor distillate flow another two-phase flow with a higher temperature is generated; here, the liquid distillate flow. The water is circulated through the column, distillate tank, and ejector; 7 the other two-phase flow is separated into another vapor distillate flow and a liquid distillate flow; and pumping at least a portion of the concentrated liquid wastewater stream into the heat exchanger.

13. The method according to claim 12, where the wastewater flow passes through a falling film heat exchanger. Another 15 streams of steam distillate are heated.

14. The method according to claim 12, where raw wastewater feed flow is suspended or It is an aqueous stream containing dissolved solids.

15. The method is according to claim 12, and also includes liquid distillate flow and concentrated liquid wastewater flow. It involves heating the raw wastewater feed stream using a heating method.

16. The method according to claim 12, where the column converts the two-phase flow to vapor distillate flow and It separates the concentrated liquid wastewater stream.

17. The method according to claim 12, where the distillate tank receives the liquid distillate flow from the column. balls.

18. The method according to claim 12, where the ejector directs the flow of vapor distillate and liquid distillate By combining the flows, it produces another two-phase flow.

19. The method is according to claim 12, and also the flow of liquid distillate from the distillate tank is via a propellant. It involves sending the fluid into the ejector.

Images