Novel clean steam generating device and control method thereof

Abstract

The invention discloses a novel clean steam generation device and a control method thereof. The novel clean steam generation device comprises a pretreatment filtering unit, a reverse osmosis purification unit, an electric heating steam generation unit, a double-heat-exchange evaporation unit and a PLC control unit which are arranged in an outer shell. A water outlet of the pretreatment filter unit is hermetically communicated with a water inlet of the reverse osmosis purification unit through a pipeline, and a purified water outlet of the reverse osmosis purification unit is hermetically communicated with a purified water inlet of the double-heat-exchange evaporation unit through a pipeline; a primary steam outlet of the electric heating steam generation unit is hermetically communicated with a primary steam inlet of the double-heat-exchange evaporation unit through a pipeline, and a pure steam outlet of the double-heat-exchange evaporation unit is directly communicated to a steam using end through a pipeline; according to the invention, multi-medium pretreatment and multi-group reverse osmosis deep purification are matched with gravity separation and purification of the double-heat-exchange evaporation unit, so that pollutants such as chemicals, particulate matters and microorganisms are thoroughly removed, and the high-hygiene-grade steam using requirements in food, medical and pharmaceutical industries are completely met.

Description

Technical Field

[0001] This invention belongs to the field of pure steam preparation technology, specifically relating to a novel clean steam generator and its control method. Background Technology

[0002] In the fields of food production and processing, medical and health care, and medical device manufacturing, steam needs to come into direct contact with materials and medical devices for processes such as disinfection, sterilization, heating and drying. Steam generated by traditional industrial boilers contains pollutants such as boiler feedwater chemicals, pipe scale, and rust, which can easily cause food contamination and the risk of infection of medical devices. At the same time, reactive pollutants can corrode equipment and shorten the service life of instruments.

[0003] Traditional gas-fired steam boilers need to be located far from clean rooms and are subject to many regulatory restrictions, making them unsuitable for special scenarios such as disaster areas and emergencies. Conventional steam generating equipment has problems such as dead corners in the sanitary structure, poor sealing, susceptibility to contamination by low-sanitary media, and low level of automation control, making it difficult to meet the high hygiene standards and stable operation requirements of the food, medical, and pharmaceutical industries. Therefore, we propose a new type of clean steam generating device and its control method. Summary of the Invention

[0004] The purpose of this invention is to provide a novel clean steam generator and its control method to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a novel clean steam generating device, comprising a pretreatment filtration unit, a reverse osmosis purification unit, an electric steam generating unit, a dual heat exchange evaporation unit, and a PLC control unit disposed within a housing; the outlet of the pretreatment filtration unit is sealed and connected to the inlet of the reverse osmosis purification unit via a pipeline, and the pure water outlet of the reverse osmosis purification unit is sealed and connected to the pure water inlet of the dual heat exchange evaporation unit via a pipeline; the primary steam outlet of the electric steam generating unit is sealed and connected to the primary steam inlet of the dual heat exchange evaporation unit via a pipeline, and the pure steam outlet of the dual heat exchange evaporation unit is directly connected to the steam-consuming end via a pipeline; the PLC control unit is electrically connected to the pretreatment filtration unit, the reverse osmosis purification unit, the electric steam generating unit, and the dual heat exchange evaporation unit respectively, realizing fully automatic control of the device.

[0006] Preferably, the pretreatment filtration unit is a multi-media filter, and pressure gauges are installed at both the inlet and outlet of the multi-media filter, and the multi-media filter has a built-in differential pressure automatic alarm device; the signal output terminal of the differential pressure automatic alarm device is communicatively connected to the signal input terminal of the PLC control unit.

[0007] Preferably, the dual heat exchange evaporation unit is a dual heat exchange structure consisting of an external preheater and an evaporator connected in series independently; a pressure sensor and a level transmitter are fixedly installed inside the evaporator, and the signal output terminals of the pressure sensor and the level transmitter are electrically connected to the PLC control unit.

[0008] Preferably, the reverse osmosis purification unit is a deep purification structure composed of multiple reverse osmosis main units connected in series. The input and output ends of the multiple reverse osmosis main units are connected sequentially from top to bottom, and the output end of the lowest reverse osmosis main unit is sealed and connected to the pure water inlet of the dual heat exchange evaporation unit through a pipeline.

[0009] Preferably, all pipes, cavities, and heat exchange components in the device that come into direct contact with pure water and pure steam are made of SUS304 stainless steel; the welded joints between the pipes and the device cylinder are sealed using a fully automated welding process with internal and external argon protection.

[0010] Preferably, the pretreatment filtration unit, the reverse osmosis purification unit, the electric steam generation unit, the dual heat exchange evaporation unit, and the PLC control unit are all mounted on a bracket at the bottom of the outer casing. The PLC control unit is equipped with a remote signal transmission interface, which can transmit the device's operating parameters to an external control room.

[0011] A control method for a novel clean steam generator includes the following steps: raw water is initially filtered by a pretreatment filtration unit and then transported through pipelines to a reverse osmosis purification unit to prepare pure water; the pure water is pumped into a dual heat exchange evaporation unit, and an electric steam generator introduces primary steam into the dual heat exchange evaporation unit for heat exchange heating; a PLC control unit adjusts the primary steam intake and pure water intake in real time based on the pressure and liquid level signals of the dual heat exchange evaporation unit to achieve constant pressure output of pure steam. Preferably, the pure water is heated and evaporated in the dual heat exchange evaporation unit to form secondary steam, which rises slowly inside the evaporator, achieving impurity separation and purification through the height of the evaporator cavity, and the purified pure steam is delivered to the steam-consuming end through the outlet.

[0012] Preferably, the condensate formed after the first steam heat exchange in the dual heat exchange evaporation unit settles to the bottom along the cavity of the dual heat exchange evaporation unit and is discharged into the circulation loop through the condensation pipe to achieve recycling and reuse.

[0013] Preferably, the PLC control unit collects the differential pressure data of the multi-media filter in real time. When the differential pressure exceeds the preset threshold, it triggers the differential pressure automatic alarm device and performs a warning prompt or device protective shutdown operation.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] 1. High Steam Purity: Through multi-media pretreatment and multiple sets of reverse osmosis for deep purification, combined with gravity separation purification by dual heat exchange evaporation units, it thoroughly removes contaminants such as chemicals, particulate matter, and microorganisms, fully meeting the high hygiene requirements of the food, medical, and pharmaceutical industries. 2. Strong Adaptability: Utilizing an electric steam generation unit, it does not require location outside the cleanroom and is not constrained by the stringent environmental requirements of gas-fired boilers. It can be used in various scenarios such as routine production, disaster relief, and temporary disinfection. 3. Thorough Hygiene and Safety: The independent series dual heat exchange structure eliminates cross-contamination. Contact parts are made of SUS304 sanitary-grade stainless steel, ensuring thorough welding and sealing. The process meets pharmaceutical-grade standards, with no unsanitary corners, no leaks, and no corrosion; 4. Stable and intelligent operation: PLC fully automatic control, combined with real-time adjustment of pressure, liquid level, and differential pressure signals, achieves constant pressure steam production, automatic alarm, and remote monitoring, ensuring stable operation, low failure rate, and easy operation; 5. Energy-saving and environmentally friendly: Condensate is recycled and reused, waste heat is fully utilized, the modular integrated structure is compact and occupies little space, reducing water, electricity, and heat consumption, and lowering operation and maintenance costs; 6. Durable and easy to maintain: No moving parts, high welding quality, corrosion-resistant materials, and long service life; the modular structure facilitates disassembly, cleaning, and replacement of parts, resulting in high maintenance efficiency. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the present invention; Figure 2 This is a schematic diagram of the overall three-dimensional structure of the present invention; Figure 3 This is a partial three-dimensional structural schematic diagram of the present invention; Figure 4 This is a partial three-dimensional structural schematic diagram of the present invention; Figure 5 This is a partial three-dimensional structural schematic diagram of the present invention; Figure 6 This is a partial three-dimensional structural schematic diagram of the present invention.

[0017] In the diagram: 1. Outer shell; 2. Pretreatment filtration unit; 3. Reverse osmosis purification unit; 4. Electric steam generation unit; 5. Dual heat exchange evaporation unit; 6. PLC control unit. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] Please see Figures 1-6The novel clean steam generator provided by this invention includes a pretreatment filtration unit 2, a reverse osmosis purification unit 3, an electric steam generator 4, a dual heat exchange evaporation unit 5, and a PLC control unit 6, all housed within an outer casing 1. The outlet of the pretreatment filtration unit 2 is sealed to the inlet of the reverse osmosis purification unit 3 via a pipeline, performing preliminary filtration of the raw water to provide pretreatment assurance for subsequent deep purification. The pure water outlet of the reverse osmosis purification unit 3 is sealed to the pure water inlet of the dual heat exchange evaporation unit 5 via a pipeline and a delivery pump, further purifying the pretreated water into pure water and stably delivering it to… Evaporation station; the primary steam outlet of the electric steam generating unit 4 is sealed and connected to the primary steam inlet of the double heat exchange evaporation unit 5 through a pipeline to generate high-temperature primary steam, providing a heat source for the evaporation of pure water; the pure steam outlet of the double heat exchange evaporation unit 5 is directly connected to the steam-using end through a pipeline to convert pure water into high-purity secondary steam and deliver it to the use station; the PLC control unit 6 is electrically connected to the pretreatment filtration unit 2, the reverse osmosis purification unit 3, the electric steam generating unit 4 and the double heat exchange evaporation unit 5 respectively, and is used to collect the operating signals of each unit, automatically adjust the operating parameters, and realize the automatic control of the entire device.

[0020] In this embodiment, the pretreatment filtration unit 2 is a multi-media filter. Pressure gauges are installed at both the inlet and outlet of the multi-media filter, and the multi-media filter has a built-in differential pressure automatic alarm device. The signal output terminal of the differential pressure automatic alarm device is electrically connected to the signal input terminal of the PLC control unit 6. The multi-media filter can filter out large impurities such as suspended solids and particulate matter in the raw water, protecting the subsequent reverse osmosis purification unit from clogging and damage. The pressure gauges display the pressure before and after filtration in real time, and the differential pressure automatic alarm device can promptly alarm when the filter is clogged, reminding maintenance and ensuring the continuous and stable operation of the pretreatment.

[0021] In this embodiment, the dual heat exchange evaporation unit is a dual heat exchange structure consisting of an external preheater and an evaporator connected in series independently. A pressure sensor and a level transmitter are fixedly installed inside the evaporator, and the signal output terminals of both the pressure sensor and the level transmitter are electrically connected to the PLC control unit. The external preheater and the evaporator are connected in series independently to form a dual heat exchange structure, which can completely isolate low-sanitation-level media contamination and improve the steam hygiene level. The pressure sensor collects the pressure signal inside the evaporator in real time, providing data support for constant pressure steam production. The level transmitter monitors the liquid level inside the evaporator in real time to prevent dry burning or overflow, ensuring safe and stable evaporation.

[0022] In this embodiment, the reverse osmosis purification unit is a deep purification structure composed of multiple reverse osmosis units connected in series. The input and output ends of the multiple reverse osmosis units are connected sequentially from top to bottom, and the output end of the lowest reverse osmosis unit is sealed to the pure water inlet of the dual heat exchange evaporation unit through a pipeline. The series connection of multiple reverse osmosis units can deeply remove pollutants such as ions, microorganisms, organic matter, and heavy metals from the raw water, producing high-purity pure water, and ensuring that the final pure steam is free of impurities and pollution from the water source.

[0023] In this embodiment, all pipes, cavities, and heat exchange components in the device that come into direct contact with pure water and pure steam are made of SUS304 stainless steel. The welded joints between the pipes and the device cylinder are sealed using a fully automated welding process with internal and external argon protection. SUS304 stainless steel is corrosion-resistant and does not release harmful substances, meeting food and pharmaceutical hygiene standards. The fully automated welding process with internal and external argon protection eliminates welding dead corners and ensures a tight seal, preventing steam leakage and secondary pollution, and extending the service life of the equipment.

[0024] In this embodiment, a mounting bracket is provided at the bottom of the outer casing. The pretreatment filtration unit, reverse osmosis purification unit, electric steam generation unit, dual heat exchange evaporation unit, and PLC control unit are all integrated and installed on the mounting bracket. The PLC control unit is equipped with a remote signal transmission interface, which can transmit the device's operating parameters to an external control room. The integrated mounting bracket enables modular fixation of the device, with no moving parts, quiet and safe operation, and easy disassembly, transportation, and maintenance. The remote signal transmission interface enables centralized monitoring and improves the device's intelligent management level.

[0025] The control method for the novel clean steam generator provided in this embodiment is applied to the above-mentioned device and includes the following steps: After the raw water is initially filtered by the pretreatment filtration unit, it is transported through pipeline to the reverse osmosis purification unit to prepare pure water, remove large particulate impurities, protect the reverse osmosis host, and improve purification efficiency; the pure water is sent to the dual heat exchange evaporation unit by the delivery pump, and the electric steam generator introduces primary steam into the dual heat exchange evaporation unit for heat exchange heating, stably delivering pure water, and using the waste heat of the primary steam for efficient heating, reducing energy consumption; the PLC control unit adjusts the primary steam intake and pure water intake in real time according to the pressure signal and liquid level signal of the dual heat exchange evaporation unit to achieve constant pressure output of pure steam, ensure stable pure steam output pressure, and meet the process requirements of the steam-using equipment.

[0026] In this embodiment, pure water is heated and evaporated in the dual heat exchange evaporation unit to form secondary steam. The secondary steam rises slowly inside the evaporator, and impurities are separated and purified by the height of the evaporator cavity. The purified pure steam is then transported to the steam-using end through the outlet. Residual impurities are separated by gravity and the rising rate of the steam, further improving the purity of the steam.

[0027] In this embodiment, the condensate formed after the first steam heat exchange in the dual heat exchange evaporation unit settles to the bottom along the cavity of the dual heat exchange evaporation unit and is discharged into the device circulation pipeline through the condensation pipeline to achieve recycling and reuse; the waste heat and water resources of the condensate are recovered, reducing the water consumption and energy consumption of the device, which is energy-saving and environmentally friendly.

[0028] In this embodiment, the PLC control unit collects the differential pressure data of the multi-media filter in real time. When the differential pressure exceeds the preset threshold, it triggers the differential pressure automatic alarm device and performs a warning prompt or device protective shutdown operation to avoid filter blockage and device failure, and ensure the continuous and safe operation of the device.

[0029] The beneficial effects of this invention are:

[0030] 1. High Steam Purity: Through multi-media pretreatment and multiple sets of reverse osmosis for deep purification, combined with gravity separation purification by dual heat exchange evaporation units, it thoroughly removes contaminants such as chemicals, particulate matter, and microorganisms, fully meeting the high hygiene requirements of the food, medical, and pharmaceutical industries. 2. Strong Adaptability: Utilizing an electric steam generation unit, it does not require location outside the cleanroom and is not constrained by the stringent environmental requirements of gas-fired boilers. It can be used in various scenarios such as routine production, disaster relief, and temporary disinfection. 3. Thorough Hygiene and Safety: The independent series dual heat exchange structure eliminates cross-contamination. Contact parts are made of SUS304 sanitary-grade stainless steel, ensuring thorough welding and sealing. The process meets pharmaceutical-grade standards, with no unsanitary corners, no leaks, and no corrosion; 4. Stable and intelligent operation: PLC fully automatic control, combined with real-time adjustment of pressure, liquid level, and differential pressure signals, achieves constant pressure steam production, automatic alarm, and remote monitoring, ensuring stable operation, low failure rate, and easy operation; 5. Energy-saving and environmentally friendly: Condensate is recycled and reused, waste heat is fully utilized, the modular integrated structure is compact and occupies little space, reducing water, electricity, and heat consumption, and lowering operation and maintenance costs; 6. Durable and easy to maintain: No moving parts, high welding quality, corrosion-resistant materials, and long service life; the modular structure facilitates disassembly, cleaning, and replacement of parts, resulting in high maintenance efficiency.

[0031] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A novel clean steam generator, characterized in that, It includes a pretreatment filtration unit, a reverse osmosis purification unit, an electric steam generation unit, a dual heat exchange evaporation unit, and a PLC control unit, all housed within the outer casing. The outlet of the pretreatment filtration unit is sealed to the inlet of the reverse osmosis purification unit through a pipeline, and the pure water outlet of the reverse osmosis purification unit is sealed to the pure water inlet of the dual heat exchange evaporation unit through a pipeline. The primary steam outlet of the electric heating steam generating unit is sealed and connected to the primary steam inlet of the dual heat exchange evaporation unit through a pipeline, and the pure steam outlet of the dual heat exchange evaporation unit is directly connected to the steam-consuming end through a pipeline. The PLC control unit is electrically connected to the pretreatment filtration unit, the reverse osmosis purification unit, the electric steam generation unit, and the dual heat exchange evaporation unit to achieve fully automatic control of the device.

2. The novel clean steam generator according to claim 1, characterized in that: The pretreatment filtration unit is a multi-media filter. Pressure gauges are installed at both the inlet and outlet of the multi-media filter, and the multi-media filter has a built-in automatic differential pressure alarm device. The signal output terminal of the differential pressure automatic alarm device is communicatively connected to the signal input terminal of the PLC control unit.

3. The novel clean steam generator according to claim 1, characterized in that: The dual heat exchange evaporation unit is a dual heat exchange structure consisting of an external preheater and an evaporator connected in series independently. A pressure sensor and a level transmitter are fixedly installed inside the evaporator, and the signal output terminals of the pressure sensor and the level transmitter are both electrically connected to the PLC control unit.

4. The novel clean steam generator according to claim 1, characterized in that: The reverse osmosis purification unit is a deep purification structure composed of multiple reverse osmosis main units connected in series. The input and output ends of the multiple reverse osmosis main units are connected sequentially from top to bottom, and the output end of the lowest reverse osmosis main unit is sealed and connected to the pure water inlet of the dual heat exchange evaporation unit through a pipeline.

5. A novel clean steam generator according to claim 1, characterized in that: All pipes, cavities, and heat exchange components in the device that come into direct contact with pure water and pure steam are made of SUS304 stainless steel. The welding joints between the pipeline and the device cylinder are sealed using a fully automated welding process with internal and external argon gas protection.

6. A novel clean steam generator according to claim 1, characterized in that: The pretreatment filtration unit, the reverse osmosis purification unit, the electric steam generation unit, the dual heat exchange evaporation unit, and the PLC control unit are all mounted on a bracket at the bottom of the outer casing. The PLC control unit is equipped with a remote signal transmission interface, which can transmit the device's operating parameters to an external control room.

7. A control method for a novel clean steam generator according to any one of claims 1-6, characterized in that, Includes the following steps: After being pre-filtered by the pretreatment filtration unit, the raw water is transported through pipelines to the reverse osmosis purification unit to produce pure water. Pure water is pumped into the dual heat exchange evaporation unit, and the electric steam generator introduces primary steam into the dual heat exchange evaporation unit for heat exchange heating. The PLC control unit adjusts the primary steam intake and pure water intake in real time based on the pressure and liquid level signals of the dual heat exchange evaporation units to achieve constant pressure output of pure steam.

8. The control method for a novel clean steam generator according to claim 7, characterized in that: Pure water is heated and evaporated in the double heat exchange evaporation unit to form secondary steam. The secondary steam rises slowly inside the evaporator and passes through the height of the evaporator cavity to separate and purify impurities. The purified pure steam is then transported to the steam-using end through the outlet.

9. The control method for a novel clean steam generator according to claim 7, characterized in that: The condensate formed after the first steam heat exchange in the dual heat exchange evaporation unit settles to the bottom along the cavity of the dual heat exchange evaporation unit and is discharged into the circulation loop through the condensation pipe to achieve recycling and reuse.

10. The control method for a novel clean steam generator according to claim 7, characterized in that: The PLC control unit collects the differential pressure data of the multi-media filter in real time. When the differential pressure exceeds the preset threshold, it triggers the automatic differential pressure alarm device and performs early warning prompts or device protective shutdown operations.

Images