Hot-method seawater production smooth and stable system
By designing a stable thermal seawater production system, using a mixing device for temperature reduction and pressure reduction and negative pressure steam capacity expansion and treatment of external low-pressure steam, the problem of unstable water production caused by insufficient steam is solved, and the secondary utilization of steam resources and the stability of device production is achieved.
Patent Information
- Application Number
- CN202420265132.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-02-02
- Publication Date
- 2025-05-13
- Estimated Expiration
- 2034-02-02
AI Technical Summary
In the existing thermal seawater desalination technology, the water production cannot be guaranteed due to insufficient steam, resulting in unstable device production.
A thermal seawater production stability system is designed, including a temperature reduction and pressure reduction device and a negative pressure steam capacity expansion and mixing device. By reducing and cooling the external low-pressure steam, its pressure and temperature are adjusted to meet the requirements of the thermal seawater desalination device, and the stability of the exhaust flow is ensured through the feedback adjustment system.
Through this system, the problem of water production instability caused by insufficient steam can be effectively solved, the secondary utilization of steam resources can be realized, and the production stability of seawater desalination equipment can be improved.
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Figure CN222861207U_ABST
Abstract
Description
Technical Field
[0001] The present application belongs to the technical field of seawater desalination, and in particular to a thermal seawater production smooth system. Background Art
[0002] Seawater desalination refers to the technology and process of obtaining fresh water from seawater. It is a water treatment technology that removes most of the salts in seawater so that the treated seawater can meet the standards for domestic and production water. At present, there are dozens of directions for seawater desalination, and the main ones that have reached commercial scale are reverse osmosis and distillation, namely membrane method and thermal method. In the existing technology, steel, petrochemical, and power generation companies usually use steam generated by by-products or exhaust steam after power generation to desalinate seawater by thermal methods. However, in the actual production process, the amount of steam or exhaust steam is not stable, so the load of thermal seawater desalination needs to be adjusted accordingly, which is not conducive to the stability of the device and the water output cannot be guaranteed. Utility Model Content
[0003] The present application aims to at least to some extent solve the technical problem that the water production in the thermal seawater desalination process cannot be guaranteed due to insufficient steam. To this end, the present application provides a thermal seawater production smooth system.
[0004] In the first aspect, a thermal seawater production smooth system provided in an embodiment of the present application includes: a temperature reduction and pressure reduction device, which is provided with an inlet end for connecting to external low-pressure steam, and is used to adjust the temperature and pressure of the external low-pressure steam to standard values; a negative pressure steam expansion and mixing device, the inlet end of the negative pressure steam expansion and mixing device is connected to the outlet end of the temperature reduction and pressure reduction device; a thermal seawater desalination device, the thermal seawater desalination device is connected to the steam turbine through a delivery pipe, the steam turbine is used to provide exhaust steam to the thermal seawater desalination device, and the outlet end of the negative pressure steam expansion and mixing device is connected to the inlet end of the thermal seawater desalination device. Through the above structure, the temperature reduction and pressure reduction device can introduce external low-pressure steam into the negative-pressure steam expansion and mixing device, and the pressure and temperature of the steam can be adjusted through the negative-pressure steam expansion and mixing device and the temperature reduction and pressure reduction device, so that the pressure and temperature of the steam can meet the temperature and pressure requirements of the thermal seawater desalination device, thereby utilizing the steam generated by by-products usually utilized by steel, petrochemical, and power generation enterprises for seawater desalination treatment, thereby achieving secondary utilization of steam resources, and at the same time, to a certain extent, solving the technical problem of unstable supply of exhausted steam by the steam turbine in the prior art, which leads to unstable production of the seawater desalination device.
[0005] In some embodiments, the temperature and pressure reduction device includes a first pressure reducing valve and a cooling pipe, the outlet end of the first pressure reducing valve is connected to the inlet end of the cooling pipe, the inlet end of the first pressure reducing valve is used to connect to external low-pressure steam, the external low-pressure steam is usually about 0.3MPa.a external low-pressure steam generated by a sintering waste heat boiler, and the first pressure reducing valve is used to reduce the pressure of the low-pressure steam to 0.1MPa.a.
[0006] In some embodiments, a second pressure reducing valve is further included, wherein the first pressure reducing valve is connected to the second pressure reducing valve, and the second pressure reducing valve is provided with a high-pressure steam inlet, and the second pressure reducing valve is used to reduce the pressure of the high-pressure steam. Through the above structure, it is possible to effectively prevent the external low-pressure steam generated by the sintering waste heat boiler from being insufficient or the steam pressure and flow rate of the external low-pressure steam from fluctuating. The high-pressure steam is reduced in pressure to 0.4 MPa through the second pressure reducing valve, and then is sent into the temperature and pressure reduction device through the steam pipeline to replenish the steam volume of the system.
[0007] In some embodiments, a cooling reflux pipeline is provided between the thermal desalination device and the cooling and pressure reduction device, and the desalinated water or condensed water generated by the thermal desalination device can be used as cooling water through the cooling reflux pipeline to achieve a cooling effect.
[0008] In some embodiments, both ends of the cooling return pipeline are connected to the outlet end of the thermal seawater desalination device and the outside of the cooling pipe. The cooling water can take away the heat of the low-pressure steam inside and outside the cooling and pressure stabilizing device, thereby achieving the cooling function.
[0009] In some embodiments, a feedback regulation system is also included, which includes a monitoring device, a processor and a controller. The detection device is used to detect the flow rate of the exhaust steam. The monitoring device is electrically connected to the processor, and the processor is electrically connected to the controller. The flow rate of the exhaust steam can be monitored at any time through the feedback regulation system, and when the exhaust steam is insufficient, the controller can be opened to keep the flow rate of the exhaust steam stable.
[0010] In some embodiments, the monitoring device is a flow meter, which is installed on the delivery pipe and electrically connected to the processor. The flow meter can detect the flow of the exhaust steam, thereby feeding back the flow data to the processor in real time.
[0011] In some embodiments, the controller is a first solenoid valve, which is fixedly installed at the inlet end of the temperature and pressure reduction device. The first solenoid valve is electrically connected to the processor, and the processor can control the opening and closing and flow rate of the first solenoid valve according to instructions, so that the steam flow of the thermal seawater desalination device remains consistent, thereby ensuring the stability of the desalinated water production.
[0012] In some embodiments, a second solenoid valve is disposed on the second pressure reducing device, and the second solenoid valve is electrically connected to the processor to achieve the allocation between high-pressure steam and low-pressure steam.
[0013] The technical principles and beneficial effects of this application are:
[0014] The temperature-reducing and pressure-reducing device can be used to reduce the temperature and pressure of external low-pressure steam of about 0.3 MPa.a, for example, generated by a sintering waste heat boiler. Under the action of the negative-pressure steam expansion and mixing device, the pressure and temperature of the external low-pressure steam can meet the desalination requirements of the thermal seawater desalination device, thereby fully guaranteeing the situation of insufficient air supply from the steam turbine, thereby solving the technical problem of unstable desalinated water production caused by insufficient air supply from the steam turbine in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following is a brief introduction to the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.
[0016] Figure 1 The schematic diagram of the structure of the thermal seawater production system provided by the present application is shown;
[0017] Figure numerals: 1. temperature reduction and pressure reduction device; 2. negative pressure steam expansion and mixing device; 3. thermal seawater desalination device; 4. first pressure reducing valve; 5. cooling pipe; 6. second pressure reducing valve; 7. monitoring device; 8. processor; 9. controller. DETAILED DESCRIPTION
[0018] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0019] It should be noted that all directional indications in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.
[0020] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0021] In addition, in the present utility model, descriptions such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.
[0022] In the related art, the existing desalination device for seawater production has the technical problem that the water production in the thermal seawater desalination process cannot be guaranteed due to insufficient steam. The embodiment of the present application provides a thermal seawater production smooth system, which can at least solve the technical problem that the water production in the thermal seawater desalination process cannot be guaranteed due to insufficient steam to a certain extent.
[0023] The present application is described below with reference to the accompanying drawings and specific embodiments:
[0024] The embodiment of the present application provides a thermal seawater production smooth system. The embodiment of the present application provides a thermal seawater production smooth system that can provide external steam to supplement the technical problem of reduced desalinated water production when the turbine is short of steam.
[0025] First, see Figure 1A thermal seawater production smooth system provided in an embodiment of the present application includes: a temperature reduction and pressure reduction device 1, which is provided with an inlet end for connecting to external low-pressure steam, and is used to adjust the temperature and pressure of the external low-pressure steam to standard values; a negative pressure steam expansion and mixing device 2, the inlet end of the negative pressure steam expansion and mixing device 2 is connected to the outlet end of the temperature reduction and pressure reduction device 1; a thermal seawater desalination device 3, the thermal seawater desalination device 3 is connected to the steam turbine through a delivery pipe, the steam turbine is used to provide exhaust steam to the thermal seawater desalination device 3, and the outlet end of the negative pressure steam expansion and mixing device 2 is connected to the inlet end of the thermal seawater desalination device 3. Through the above structure, the temperature reduction and pressure reduction device 1 can introduce external low-pressure steam into the negative-pressure steam expansion and mixing device 2, and the pressure and temperature of the steam can be adjusted through the negative-pressure steam expansion and mixing device 2 and the temperature reduction and pressure reduction device, so that the pressure and temperature of the steam can meet the temperature and pressure requirements of the thermal seawater desalination device 3, thereby utilizing the steam generated by by-products usually used by steel, petrochemical, and power generation enterprises to desalinate seawater, thereby achieving secondary utilization of steam resources, and at the same time, to a certain extent, solving the technical problem of unstable supply of exhausted steam by the steam turbine in the prior art, which leads to unstable production of the seawater desalination device.
[0026] In some embodiments, see Figure 1 The temperature and pressure reduction device 1 includes a first pressure reducing valve 4 and a cooling pipe 5. The outlet end of the first pressure reducing valve 4 is connected to the inlet end of the cooling pipe 5. The inlet end of the first pressure reducing valve 4 is used to connect external low-pressure steam. The external low-pressure steam is usually about 0.3MPa.a external low-pressure steam generated by a sintering waste heat boiler. The first pressure reducing valve 4 is used to reduce the pressure of the low-pressure steam to 0.1MPa.a.
[0027] In some embodiments, see Figure 1 The present application also includes a second pressure reducing valve 6. The first pressure reducing valve 4 is connected to the second pressure reducing valve 6. The second pressure reducing valve 6 is provided with a high-pressure steam inlet. The second pressure reducing valve 6 is used to reduce the pressure of the high-pressure steam. Through the above structure, it is possible to effectively prevent the external low-pressure steam generated by the sintering waste heat boiler from being insufficient or the steam pressure and flow fluctuation of the external low-pressure steam. The high-pressure steam passes through the second pressure reducing valve 6 to reduce its pressure to 0.4MPa, and then is sent to the temperature and pressure reducing device 1 through the steam pipeline to supplement the steam volume of the system.
[0028] In some embodiments, see Figure 1 A cooling reflux pipeline is provided between the thermal desalination device 3 and the temperature reduction and pressure reduction device 1, and the desalinated water or condensed water generated by the thermal desalination device 3 or the condensed water can be used as the cooling water to achieve the cooling effect through the cooling reflux pipeline.
[0029] In some embodiments, see Figure 1 The two ends of the cooling return pipeline are connected to the outlet end of the thermal seawater desalination device 3 and the cooling pipe 5. The cooling water can take away the heat of the low-pressure steam inside and outside the cooling and pressure stabilizing device, thereby achieving the cooling function.
[0030] In some embodiments, see Figure 1 The present application also includes a feedback regulation system, which includes a monitoring device 7, a processor 8 and a controller 9. The detection device is used to detect the flow rate of the exhaust steam. The monitoring device 7 is electrically connected to the processor 8, and the processor 8 is electrically connected to the controller 9. The flow rate of the exhaust steam can be monitored at any time through the feedback regulation system, and when the exhaust steam is insufficient, the controller 9 can be opened to keep the flow rate of the exhaust steam stable.
[0031] In some embodiments, see Figure 1 The monitoring device 7 is a flow meter, which is installed on the delivery pipe. The flow meter is electrically connected to the processor 8. The flow meter can detect the flow of the exhaust steam, thereby feeding back the flow data to the processor 8 in real time.
[0032] In some embodiments, see Figure 1 The controller 9 is a first solenoid valve, which is fixedly installed at the inlet end of the temperature reduction and pressure reduction device 1. The first solenoid valve is electrically connected to the processor 8. The processor 8 can control the opening and closing and flow rate of the first solenoid valve according to instructions, so that the steam flow rate of the thermal seawater desalination device 3 remains consistent, thereby ensuring the stability of the desalinated water output.
[0033] In some embodiments, see Figure 1 The second pressure reducing device is provided with a second solenoid valve, and the second solenoid valve is electrically connected to the processor 8 to achieve the allocation between high-pressure steam and low-pressure steam.
[0034] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine different embodiments or examples described in this specification.
[0035] In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the fact that they can be implemented by ordinary technicians in this field. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this application.
[0036] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present application, and that the scope of the present application is defined by the claims and their equivalents.
Claims
1. A thermal seawater production system, characterized in that: include: The temperature and pressure reduction device (1) is provided with an inlet port for connecting to external low-pressure steam and is used to adjust the temperature and pressure of the external low-pressure steam to standard values; A negative pressure steam expansion and mixing device (2), wherein the inlet end of the negative pressure steam expansion and mixing device (2) is connected to the outlet end of the temperature reduction and pressure reduction device (1); A thermal seawater desalination device (3), wherein the thermal seawater desalination device (3) is connected to a steam turbine via a delivery pipe, the steam turbine is used to provide exhaust steam to the thermal seawater desalination device (3), and the outlet end of the negative pressure steam expansion mixing device (2) is connected to the inlet end of the thermal seawater desalination device (3).
2. A thermal seawater production system according to claim 1, characterized in that: The temperature reduction and pressure reduction device (1) comprises a first pressure reducing valve (4) and a temperature reduction pipe (5), wherein the outlet end of the first pressure reducing valve (4) is connected to the inlet end of the temperature reduction pipe (5), and the inlet end of the first pressure reducing valve (4) is used to connect to the external low-pressure steam.
3. A thermal seawater production system according to claim 2, characterized in that: It also comprises a second pressure reducing valve (6), the first pressure reducing valve (4) is in communication with the second pressure reducing valve (6), the second pressure reducing valve (6) is provided with a high-pressure steam inlet, and the second pressure reducing valve (6) is used to reduce the pressure of the high-pressure steam.
4. A thermal seawater production system according to claim 2, characterized in that: A cooling reflux pipeline is provided between the thermal seawater desalination device (3) and the cooling and pressure reduction device (1).
5. A thermal seawater production system according to claim 4, characterized in that: Both ends of the cooling return pipeline are in communication with the outlet end of the thermal seawater desalination device (3) and the outside of the cooling pipe (5).
6. A thermal seawater production system according to claim 3, characterized in that: The invention also includes a feedback regulation system, which includes a monitoring device (7), a processor (8) and a controller (9). The monitoring device (7) is used to detect the flow rate of the exhaust steam. The monitoring device (7) is electrically connected to the processor (8), and the processor (8) is electrically connected to the controller (9).
7. A thermal seawater production system according to claim 6, characterized in that: The monitoring device (7) is a flow meter, which is installed on the delivery pipe and is electrically connected to the processor (8).
8. A thermal seawater production system according to claim 6, characterized in that: The controller (9) is a first solenoid valve, which is fixedly mounted at the inlet end of the temperature reduction and pressure reduction device (1), and is electrically connected to the processor (8).
9. A thermal seawater production system according to claim 6, characterized in that: The second pressure reducing valve (6) is provided with a second solenoid valve, and the second solenoid valve is electrically connected to the processor (8).