Pure steam generator

Abstract

The invention relates to the technical field of pure steam generators, in particular to a pure steam generator which comprises a first-effect preheater, a second-effect preheater, an evaporator and a condensation sampler. The first-effect preheater is connected with the raw material water inlet through a pipeline; meanwhile, the first-effect preheater is connected with a steam condensation water outlet through a pipeline, and steam condensation water enters from one side of the first-effect preheater from the steam condensation water outlet through the pipeline, flows out from the other side of the first-effect preheater and then returns to the pipeline of the steam condensation water outlet. Through the heat recovery system, residual heat energy of steam condensation water and industrial steam is effectively recovered to be used for preheating raw material water, meanwhile, energy-saving control devices are arranged on pipelines of all parts, the flow and temperature of a heat medium can be automatically adjusted according to actual requirements, the energy utilization efficiency is greatly improved, and energy resources are saved. The water distribution device and the steam-water separation device are arranged in the evaporator, and the unique three-time separation effect is achieved, so that impurities and water in secondary steam are effectively removed, and the quality of pure steam is remarkably improved.

Description

Technical Field

[0001] The invention relates to the technical field of pure steam generators, in particular to a pure steam generator. Background Art

[0002] In the current field of pure steam generators, existing equipment has many problems that need to be solved. On the one hand, the energy utilization efficiency of the equipment is low, and it fails to fully recover and utilize the residual heat energy of steam condensate and industrial steam after releasing heat, resulting in a large amount of energy waste and increased production costs. On the other hand, the steam quality assurance measures in the steam production process are insufficient, and there is a lack of effective steam-water separation methods and impurity removal mechanisms, resulting in the output of pure steam containing more impurities and moisture, which is difficult to meet the production process requirements for high steam purity. Summary of the invention

[0003] The object of the present invention is to overcome the above problems or at least partially solve the above problems and to provide a pure steam generator.

[0004] To achieve the above object, the present invention provides the following technical solution: a pure steam generator, comprising a first-effect preheater, a second-effect preheater, an evaporator and a condensation sampler;

[0005] The first-effect preheater is connected to the raw water inlet through a pipeline; at the same time, the first-effect preheater is connected to the steam condensate outlet through a pipeline, and the steam condensate enters from the steam condensate outlet through the pipeline from one side of the first-effect preheater, flows out from the other side and returns to the pipeline of the steam condensate outlet; the raw water output end of the first-effect preheater is connected to the raw water input end of the second-effect preheater through a pipeline, and the raw water after preliminary preheating is transported to the second-effect preheater;

[0006] The industrial steam input end of the evaporator is connected to the industrial steam inlet through a pipeline, and the industrial steam enters from the industrial steam inlet to provide a heat source for evaporation of the raw water in the evaporator;

[0007] The raw water output end of the two-effect preheater is connected to the top inlet of the evaporator through a pipeline; one side of the two-effect preheater is connected to the pipeline on the steam condensate outlet through a pipeline, and the other side is connected to the pipeline on the industrial steam inlet through a pipeline;

[0008] The bottom of the evaporator is connected to the concentrated water discharge port through a pipeline;

[0009] The evaporator is also connected to a pure steam output port via a pipeline;

[0010] The condensation sampler is connected to a pipeline on the pure steam output port through a pipeline.

[0011] In a preferred embodiment, a safety valve discharge port is provided on the pipeline of the industrial steam inlet.

[0012] In a preferred embodiment, the condensation sampler is connected to a distilled water outlet via a pipeline, and a pure steam sampling port is also provided on the condensation sampler.

[0013] In a preferred embodiment, the evaporator is provided with a water separation device, evaporation tubes and a steam-water separation device. The water separation device is located at the top inlet of the evaporator and is used to evenly distribute the raw water entering the evaporator into the evaporation tubes; the steam-water separation device is arranged in the evaporator and is used to separate steam and water from the secondary steam generated by evaporation.

[0014] In a preferred embodiment, the secondary steam in the evaporator undergoes three separation actions, including the first separation when it flows downward along the evaporation tubes and evaporates, the second separation when the impurities are separated to the lower part under the action of gravity when it turns 180 degrees at the lower end of the evaporator, and the third separation performed at the steam-water separation device in the evaporator.

[0015] In a preferred embodiment, the shells of the first-effect preheater, the second-effect preheater and the evaporator are wrapped with asbestos insulation material, and the surface is covered with an AISI304 stainless steel satin polished protective layer.

[0016] In a preferred embodiment, liquid level sensors are provided in the first-effect preheater, the second-effect preheater and the evaporator. The liquid level sensors are connected to the PLC control system and can monitor the liquid level conditions in each component in real time.

[0017] In a preferred embodiment, energy-saving control devices are provided on the pipelines of the first-effect preheater, the second-effect preheater and the evaporator. The energy-saving control devices can automatically adjust the flow rate and temperature of the heat medium according to the flow rate and temperature of the raw water and the demand for steam generation to achieve energy-saving operation.

[0018] In a preferred embodiment, the pure steam generator also includes a heat recovery system for recovering steam condensate and residual heat energy of industrial steam after releasing heat in the equipment, and reusing the recovered heat energy to preheat raw water or other links requiring heat energy.

[0019] Compared with the prior art, the present invention has the following beneficial effects: in terms of energy utilization, through the heat recovery system, the residual heat energy of steam condensate and industrial steam is effectively recovered for preheating raw water. At the same time, energy-saving control devices are arranged on the pipelines of each component, which can automatically adjust the flow and temperature of the heat medium according to actual needs, greatly improving the energy utilization efficiency and reducing production costs; a water separation device, a steam-water separation device and a unique tertiary separation function are arranged in the evaporator to effectively remove impurities and moisture in the secondary steam, and significantly improve the quality of pure steam; the equipment has high operating stability and automation, and liquid level sensors are installed in each component and connected to the PLC control system to monitor the liquid level in real time and automatically control the feed amount. The automatic operation control system can automatically control the industrial steam intake, raw water feed amount and concentrated water discharge amount according to preset parameters, reducing manual intervention. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of the connection of various components of the pure steam generator of the present invention;

[0021] In the figure: 1 is the raw water inlet; 2 is the distilled water outlet; 3 is the pure steam sampling port; 4 is the steam condensate outlet; 5 is the concentrated water discharge port; 6 is the industrial steam inlet; 7 is the pure steam output port; 8 is the safety valve discharge port; P1 is a single-effect preheater; P2 is a double-effect preheater; E is an evaporator. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] See also Figure 1 The present invention provides a technical solution: a pure steam generator, the main structure of which is made of AISI 316L stainless steel to ensure the corrosion resistance and sanitation of the equipment and meet the production process requirements for high steam purity, including a first-effect preheater P1, a second-effect preheater P2, an evaporator E and a condensation sampler, the first-effect preheater P1, the second-effect preheater P2, and the evaporator E The internal working surfaces are pickled and passivated to improve the surface quality and prevent impurities from contaminating the steam, and the connection parts of the pure steam generator are sealed with gaskets made of pharmaceutical-grade polytetrafluoroethylene to ensure the sealing and sanitation of the equipment and prevent the aging or contamination of the gasket from affecting the steam quality;

[0024] The first-effect preheater P1 is connected to the raw water inlet 1 through a pipeline to receive the raw water; at the same time, the first-effect preheater P1 is connected to the steam condensate outlet 4 through a pipeline, and the steam condensate enters from the steam condensate outlet 4 through the pipeline from one side of the first-effect preheater P1, flows out from the other side and returns to the pipeline of the steam condensate outlet 4, thereby using the heat of the steam condensate to preliminarily preheat the raw water; the raw water output end of the first-effect preheater P1 is connected to the raw water input end of the second-effect preheater P2 through a pipeline, and the preliminarily preheated raw water is transported to the second-effect preheater P2;

[0025] The industrial steam input end of the evaporator E is connected to the industrial steam inlet 6 through a pipeline, and the industrial steam enters from the industrial steam inlet 6 to provide a heat source for evaporation of the raw water in the evaporator E;

[0026] The raw water output end of the second-effect preheater P2 is connected to the top inlet of the evaporator E through a pipeline, and the raw water preheated in two stages is transported to the evaporator E for evaporation; one side of the second-effect preheater P2 is connected to the pipeline on the steam condensate outlet 4 through a pipeline, and the other side is connected to the pipeline on the industrial steam inlet 6 through a pipeline, so as to realize the heat exchange of different heat media in the second-effect preheater P2, and further preheat the raw water;

[0027] The bottom of the evaporator E is connected to the concentrated water discharge port 5 through a pipeline, so that the concentrated water that has not been evaporated in the evaporator E is discharged from the equipment;

[0028] The evaporator E is also connected to a pure steam outlet 7 through a pipeline for outputting the pure steam generated by the evaporator E;

[0029] The condensation sampler is connected to the pipeline on the pure steam output port 7 through a pipeline, and is used to receive a trace amount of pure steam from the evaporator E and perform condensation processing on it.

[0030] During specific implementation, a safety valve discharge port 8 is provided on the pipeline of the industrial steam inlet 6, which is used to discharge gas when the internal pressure of the equipment increases abnormally, so as to ensure the safety of the equipment.

[0031] During specific implementation, the condensation sampler is connected to a distilled water outlet 2 through a pipeline for discharging the distilled water after condensation treatment. A pure steam sampling port 3 is also provided on the condensation sampler for facilitating sampling and testing of pure steam.

[0032] During specific implementation, a water separation device, evaporation tubes and a steam-water separation device are provided inside the evaporator E. The water separation device is located at the top entrance of the evaporator E, and is used to evenly distribute the raw water entering the evaporator E into the evaporation tubes; the steam-water separation device is arranged in the evaporator E, and is used to separate steam and water from the secondary steam generated by evaporation, so as to improve the quality of the pure steam output from the pure steam output port 7.

[0033] In specific implementation, the secondary steam in the evaporator E undergoes three separation actions, including the first separation when it flows downward along the evaporation tubes and evaporates, the second separation when the impurities are separated to the lower part under the action of gravity when it turns back 180 degrees at the lower end of the evaporator E, and the third separation performed at the steam-water separation device in the evaporator E.

[0034] In specific implementation, the shells of the first-effect preheater P1, the second-effect preheater P2 and the evaporator E are wrapped with asbestos insulation materials, and the surface is covered with an AISI304 stainless steel satin polished protective layer to reduce heat loss and improve the energy efficiency of the equipment.

[0035] In specific implementation, liquid level sensors are installed in the first-effect preheater P1, the second-effect preheater P2 and the evaporator E. The liquid level sensors are connected to the PLC control system, which can monitor the liquid level in each component in real time and automatically control the feed amount of raw water according to the liquid level changes to ensure stable operation of the equipment.

[0036] In specific implementation, the pure steam generator also includes a heat recovery system for recovering steam condensate and the remaining heat energy of industrial steam after releasing heat in the equipment, and reusing the recovered heat energy to preheat raw water or other links requiring heat energy, thereby improving the overall heat utilization efficiency of the equipment.

[0037] In specific implementation, energy-saving control devices are installed on the pipelines of the first-effect preheater P1, the second-effect preheater P2 and the evaporator E. The energy-saving control devices can automatically adjust the flow rate and temperature of the heat medium according to the flow rate and temperature of the raw water and the demand for steam generation to achieve energy-saving operation.

[0038] Furthermore, the pure steam generator is equipped with an automatic operation control system, which can automatically control the intake of industrial steam, the feed amount of raw water and the discharge amount of concentrated water according to preset parameters, thereby realizing the automatic operation of the equipment and reducing manual intervention.

[0039] Furthermore, all components of the pure steam generator are installed on a solid carbon steel bracket. The structural design of the carbon steel bracket facilitates the overall lifting and transportation of the equipment. At the same time, the installation method of each component on the bracket facilitates disassembly and assembly, which is convenient for the installation and commissioning of the equipment and the subsequent maintenance and replacement of components.

[0040] The detailed connection means are well-known in the art. The following mainly introduces the working principle and process. The specific work is as follows:

[0041] First, the raw water enters the first effect preheater P1 and exchanges heat with the industrial steam to achieve preliminary preheating. At the same time, the industrial steam condensate with a certain temperature discharged from the steam condensate outlet 4 enters the first effect preheater P1 to further increase the temperature of the raw water.

[0042] The preheated raw water enters the second-effect preheater P2, where it is further heated by industrial steam condensate to further increase the temperature of the raw water. After that, the raw water enters the top of the evaporator E and is evenly distributed in the evaporation tubes through the water distribution device to form a thin film of water flow. Since the water flow is thin, it evaporates quickly in the high temperature environment of the evaporator E to produce secondary steam.

[0043] During the rising process in the evaporator E, the secondary steam undergoes three separations to remove impurities and water. First, the first separation is performed when it flows downward along the evaporation tubes and evaporates; then, when it turns back 180 degrees at the lower end of the evaporator, the impurities are separated to the lower part under the action of gravity, achieving the second separation; finally, the third separation is performed at the steam-water separation device in the upper part of the evaporator. After three separations, the relatively pure secondary steam passes through the steam-water separation device and is output as pure steam from the pure steam output port 7. The trace amount of pure steam is collected by the condensation sampler, and after heat exchange with cooling water, it is cooled to become distilled water. After online conductivity detection, it is determined whether the pure steam is qualified.

[0044] After the raw water absorbs heat, the industrial steam in the evaporator E is condensed into industrial steam condensate, which is discharged from the steam condensate outlet 4. Part of it is used to preheat the raw water in the first effect preheater P1 and the second effect preheater P2 to achieve heat recovery, and the other part may be used as other process water or discharged from the equipment.

[0045] The non-condensable water discharge outlet at the top of the evaporator E will promptly discharge the non-condensable gas in the raw water that cannot condense into water, ensuring the smooth progress of the evaporation process. When the internal pressure of the equipment increases abnormally due to various reasons, the safety valve discharge port 8 opens to discharge the gas, reduce the internal pressure of the equipment, and ensure the safe operation of the equipment.

[0046] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A pure steam generator, characterized in that: It includes a first-effect preheater (P1), a second-effect preheater (P2), an evaporator (E) and a condensation sampler; The first-effect preheater (P1) is connected to the raw water inlet (1) through a pipeline; at the same time, the first-effect preheater (P1) is connected to the steam condensate outlet (4) through a pipeline, and the steam condensate enters from the steam condensate outlet (4) through the pipeline from one side of the first-effect preheater (P1), flows out from the other side and returns to the pipeline of the steam condensate outlet (4); the raw water output end of the first-effect preheater (P1) is connected to the raw water input end of the second-effect preheater (P2) through a pipeline, and the raw water after preliminary preheating is transported to the second-effect preheater (P2); The industrial steam input end of the evaporator (E) is connected to the industrial steam inlet (6) through a pipeline, and the industrial steam enters from the industrial steam inlet (6) to provide a heat source for evaporation of the raw water in the evaporator (E); The raw water output end of the second-effect preheater (P2) is connected to the top inlet of the evaporator (E) through a pipeline; one side of the second-effect preheater (P2) is connected to the pipeline on the steam condensate outlet (4) through a pipeline, and the other side is connected to the pipeline on the industrial steam inlet (6) through a pipeline; The bottom of the evaporator (E) is connected to the concentrated water discharge port (5) through a pipeline; The evaporator (E) is also connected to a pure steam output port (7) via a pipeline; The condensation sampler is connected to a pipeline on the pure steam output port (7) through a pipeline.

2. A pure steam generator according to claim 1, characterized in that: A safety valve discharge port (8) is provided on the pipeline of the industrial steam inlet (6).

3. A pure steam generator according to claim 2, characterized in that: The condensation sampler is connected to a distilled water outlet (2) via a pipeline, and a pure steam sampling port (3) is also provided on the condensation sampler.

4. A pure steam generator according to claim 3, characterized in that: The evaporator (E) is provided with a water separation device, evaporation tubes and a steam-water separation device. The water separation device is located at the top entrance of the evaporator (E) and is used to evenly distribute the raw water entering the evaporator (E) into the evaporation tubes; the steam-water separation device is arranged in the evaporator (E) and is used to separate steam and water from the secondary steam generated by evaporation.

5. A pure steam generator according to claim 4, characterized in that: The secondary steam in the evaporator (E) undergoes three separation actions, including the first separation when it flows downward along the evaporation tubes and evaporates, the second separation when the impurities are separated to the lower part under the action of gravity when it turns back 180 degrees at the lower end of the evaporator (E), and the third separation performed at the steam-water separation device in the evaporator (E).

6. A pure steam generator according to claim 5, characterized in that: The shells of the first-effect preheater (P1), the second-effect preheater (P2) and the evaporator (E) are all wrapped with asbestos insulation material, and the surface is covered with an AISI304 stainless steel satin polished protective layer.

7. A pure steam generator according to claim 6, characterized in that: Liquid level sensors are provided in the first-effect preheater (P1), the second-effect preheater (P2) and the evaporator (E). The liquid level sensors are connected to the PLC control system and can monitor the liquid level conditions in each component in real time.

8. A pure steam generator according to any one of claim 7, characterized in that: An energy-saving control device is provided on the pipelines of the first-effect preheater (P1), the second-effect preheater (P2) and the evaporator (E). The energy-saving control device can automatically adjust the flow rate and temperature of the heat medium according to the flow rate and temperature of the raw water and the demand for steam generation to achieve energy-saving operation.

9. A pure steam generator according to any one of claims 1 to 8, characterized in that: The pure steam generator also includes a heat recovery system for recovering steam condensate and residual heat energy after industrial steam releases heat in the equipment, and reusing the recovered heat energy to preheat raw water or other links requiring heat energy.

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