Steam generator for producing steam by using low-grade hot water

Abstract

The utility model relates to the technical field of steam generators, in particular to a steam generator for producing steam by using low-grade hot water. The technical problems that the temperature of a heat source of a traditional steam generator needs to exceed 100 DEG C, the heat source below 100 DEG C cannot be utilized, the pressure is high, the requirement for equipment is high, and low-temperature steam cannot be generated are solved; according to the technical scheme, the steam generator for producing the steam through the low-grade hot water comprises a generator body, a water inlet module, a measuring module, an output module, a condensation module and a return module; compared with a traditional steam generator which is difficult to use a heat source below 100 DEG C, high in pressure, high in requirement for equipment and incapable of generating low-temperature steam, the steam generator enables the low-temperature heat source to enter the steam generator through power flow, and a negative pressure vacuum state is formed in the steam generator. Low-temperature steam is evaporated by the low-temperature heat source under the small negative pressure condition, so that all heat sources with the temperature of 50 DEG C or above can be utilized, and the requirement for the equipment grade is low.

Description

Technical Field

[0001] The utility model relates to the technical field of steam generators, in particular to a steam generator which uses low-grade hot water to produce steam. Background Art

[0002] A steam generator is a device used to heat water into steam. It is very important in a variety of industrial and commercial applications, such as electricity production, heating, cleaning, moisturizing and physical therapy. In nuclear power plants, steam generators are also used to transfer the heat energy generated by the reactor core to generate steam to drive the steam turbine to generate electricity. However, in the use of traditional steam generators, the heat source temperature of traditional steam generators needs to be over 100°C. It is difficult to use heat sources below 100°C, and the pressure is relatively high, which places high demands on the equipment and cannot produce low-temperature steam. Utility Model Content

[0003] In order to overcome the problem that in the daily use of traditional steam generators, the heat source temperature of traditional steam generators needs to exceed 100°C, it is difficult to use heat sources below 100°C, and the pressure is high, the equipment requirements are high, and low-temperature steam cannot be generated.

[0004] The technical solution of the utility model is: a steam generator that uses low-grade hot water to produce steam, comprising a generator body, a water inlet module, a measuring module, an output module, a condensing module and a return module; a water inlet pipeline is provided at the input end of the generator body, the water inlet module is connected to the input end of the generator body through the water inlet pipeline, the measuring module is connected to the input end and the output end of the generator body through the measuring pipeline, the output module is connected to the output end of the generator body through the output pipeline, the condensing module is connected to the input end of the generator body through the condensing pipeline, and the return module is connected to the output end of the generator body through the return pipeline.

[0005] Preferably, the low-temperature hot water is transmitted to the generator body through the water inlet module, and the flow rate and water pressure of the low-temperature hot water are monitored to ensure the safety of the device. The volume, liquid height and weight of the liquid inside the generator body are measured by the measuring module, and the low-temperature steam in the generator body is output to the heater to heat the material through the output module. Negative pressure is drawn on the top of the generator body to form a negative pressure vacuum state in the generator. The boiling point of the low-temperature heat source is reduced under the negative pressure condition, and low-temperature steam is evaporated. The steam generated inside the generator is cooled by the condensation module, and the heat medium is output and returned through the return module.

[0006] Preferably, the water inlet module includes a first control valve, a flow transmitter, a pressure transmitter and a safety valve; the first control valve is arranged on the water inlet pipeline, the flow transmitter is arranged on the water inlet pipeline, the pressure transmitter is arranged on the water inlet pipeline, and the safety valve is arranged on the water inlet pipeline. When in use, low-temperature hot water is transmitted and processed through the water inlet pipeline, the switch of the water inlet pipeline is controlled and processed by the first control valve, the liquid flow rate in the water inlet pipeline is converted into the rotation speed of the turbine through the flow transmitter, and the rotation speed is converted into an electrical signal proportional to the flow rate, so as to measure and process the liquid flow in the water inlet pipeline, the water pressure in the water inlet pipeline is converted into an electric signal through the pressure transmitter to monitor and process the water pressure in the water inlet pipeline, and the water inlet pipeline is vented and moved by the safety valve when the internal pressure of the water inlet pipeline is too high to improve the safety of the water inlet pipeline.

[0007] Preferably, the measuring module includes a liquid level transmitter, a first input interface and a first output interface; a first input interface is provided at one end of the measuring pipeline, a first output interface is provided at the other end of the measuring pipeline, a liquid level transmitter is provided on the measuring pipeline, the measuring pipeline is connected to the output end of the generator body through the first input interface, and the measuring pipeline is connected to the input end of the generator body through the first output interface. When in use, the volume, liquid height and weight of the liquid inside the generator body are measured through the liquid transmitter based on the principle that the pressures generated by liquids of different specific gravities at different heights are in a linear relationship.

[0008] Preferably, the output module includes a heater and a second output interface; a second output interface is provided at one end of the output pipeline, and a heater is provided at the other end of the output pipeline. The output pipeline is connected to the output end of the generator body through the second output interface. When in use, the low-temperature steam in the generator body is output to the heater through the output pipeline to heat the material.

[0009] Preferably, the condensation module includes a second input interface and a pipe interface; a second input interface is provided at one end of the condensation pipe, and a pipe interface is provided at the other end of the condensation pipe. The condensation pipe is connected to the input end of the generator body through the second input interface. When in use, the condensation pipe inputs condensed water into the generator body through the pipe interface to cool the steam generated inside the generator.

[0010] Preferably, the return module includes a first booster pump, an on-site pressure gauge and a second control valve; the first booster pump is arranged on the return pipeline, the on-site pressure gauge is arranged on the return pipeline, and the second control valve is arranged on the return pipeline. When in use, the heat medium water inside the generator body is output through the return pipeline, the hot water inside the return pipeline is pressurized by the booster pump, the pressure can be indicated on-site by the on-site pressure gauge, and the return pipeline is switched on and off by the second control valve.

[0011] Preferably, the return module also includes a secondary pipe, a second booster pump, another local pressure gauge and a third control valve; a secondary pipe is arranged on the return pipeline, a second booster pump is arranged on the secondary pipe, another local pressure gauge is arranged on the secondary pipe, and a third control valve is arranged on the secondary pipe. When in use, the switch of the secondary pipe is controlled by the third control valve, the hot water in the secondary pipe is pressurized by the second booster pump, and the pressure can be indicated on site by another local pressure gauge.

[0012] Beneficial effects of the utility model:

[0013] 1. Compared with the traditional steam generator, the heat source temperature needs to be over 100℃, it is difficult to use heat sources below 100℃, and the pressure is relatively high, which places high requirements on equipment and cannot produce low-temperature steam. This steam generator allows the low-temperature heat source to enter the steam generator through the power flow, and draws negative pressure at the top of the steam generator to form a negative pressure vacuum state in the generator, and the negative pressure value is controllable. When the negative pressure condition is small, the boiling point of the low-temperature heat source decreases, and low-temperature steam is evaporated, thereby realizing the use of all heat sources above 50℃, and the equipment level requirements are low.

[0014] 2. Low-temperature hot water is transmitted through the water inlet pipeline, the switch of the water inlet pipeline is controlled by the first control valve, the liquid flow rate in the water inlet pipeline is converted into the speed of the turbine by the flow transmitter, and then the speed is converted into an electrical signal proportional to the flow, so as to measure the liquid flow in the water inlet pipeline, the water pressure in the water inlet pipeline is converted into an electric signal by the pressure transmitter to monitor the water pressure in the water inlet pipeline, and the water inlet pipeline is vented by the safety valve when the internal pressure of the water inlet pipeline is too high. The safety of the water inlet pipeline allows the low-temperature heat source to enter the steam generator through the power flow, and the negative pressure is drawn through the top of the generator body to form a negative pressure vacuum state in the generator, and the negative pressure value is controllable. The low-temperature heat source reduces the boiling point under the condition of small negative pressure, thereby evaporating low-temperature steam, and the low-temperature steam in the generator body is output to the heater through the output pipeline to heat the material, so that the low-temperature steam can be used to controllably and slowly heat the material, and theoretically all heat sources above 50°C can be used, with low requirements for equipment level;

[0015] 3. The liquid transmitter measures the volume, liquid height and weight of the liquid inside the generator body based on the principle that the pressures generated by liquids of different specific gravities at different heights are in a linear relationship. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 Shown is a schematic diagram of the structure of a steam generator for producing steam using low-grade hot water according to the utility model;

[0017] Figure 2 Shown is a schematic diagram of the structure of a water inlet module of a steam generator for producing steam using low-grade hot water according to the utility model;

[0018] Figure 3 Shown is a schematic diagram of the structure of a return module of a steam generator for producing steam using low-grade hot water according to the utility model;

[0019] Figure 4 What is shown is a schematic diagram of the structure of the steam generator output module for producing steam using low-grade hot water according to the utility model;

[0020] Explanation of the accompanying drawings: 1. Flow transmitter; 2. Pressure transmitter; 3. Local pressure gauge; 4. Liquid level transmitter. DETAILED DESCRIPTION

[0021] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0022] See also Figure 1 The utility model provides an embodiment: a steam generator for producing steam using low-grade hot water, comprising a generator body, a water inlet module, a measuring module, an output module, a condensing module and a return module; a water inlet pipeline is provided at the input end of the generator body, the water inlet module is connected to the input end of the generator body through the water inlet pipeline, the measuring module is connected to the input end and the output end of the generator body through the measuring pipeline, the output module is connected to the output end of the generator body through the output pipeline, the condensing module is connected to the input end of the generator body through the condensing pipeline, and the return module is connected to the output end of the generator body through the return pipeline.

[0023] See also Figure 2-4In this embodiment, the water inlet module includes a first control valve, a flow transmitter 1, a pressure transmitter 2 and a safety valve; a first control valve is arranged on the water inlet pipeline, a flow transmitter 1 is arranged on the water inlet pipeline, a pressure transmitter 2 is arranged on the water inlet pipeline, and a safety valve is arranged on the water inlet pipeline. When in use, low-temperature hot water is transmitted and processed through the water inlet pipeline, and the switch of the water inlet pipeline is controlled and processed through the first control valve. The flow rate of the liquid in the water inlet pipeline is converted into the rotation speed of the turbine through the flow transmitter 1, and then the rotation speed is converted into an electrical signal proportional to the flow rate, so as to measure and process the liquid flow in the water inlet pipeline, and the water pressure in the water inlet pipeline is converted into an electric signal through the pressure transmitter 2 to monitor and process the water pressure in the water inlet pipeline. When the internal pressure of the water inlet pipeline is too large, the water inlet pipeline is emptied and moved by the safety valve to improve the safety of the water inlet pipeline. The measurement module includes a liquid level transmitter. 4. A first input interface and a first output interface; a first input interface is provided at one end of the measuring pipeline, a first output interface is provided at the other end of the measuring pipeline, a liquid level transmitter 4 is provided on the measuring pipeline, the measuring pipeline is connected to the output end of the generator body through the first input interface, and the measuring pipeline is connected to the input end of the generator body through the first output interface. When in use, the liquid transmitter measures the volume, liquid height and weight of the liquid inside the generator body according to the principle that the pressures generated by liquids with different specific gravities at different heights are in a linear relationship. The output module includes a heater and a second output interface; a second output interface is provided at one end of the output pipeline, a heater is provided at the other end of the output pipeline, the output pipeline is connected to the output end of the generator body through the second output interface. When in use, the low-temperature steam in the generator body is output to the heater through the output pipeline to heat the material.

[0024] The condensation module includes a second input interface and a pipeline interface; one end of the condensation pipeline is provided with a second input interface, and the other end of the condensation pipeline is provided with a pipeline interface. The condensation pipeline is connected to the input end of the generator body through the second input interface. When in use, the condensation pipeline inputs condensed water into the generator body through the pipeline interface to cool the steam generated inside the generator. The return module includes a first booster pump, an on-site pressure gauge 3 and a second control valve; the return pipeline is provided with a first booster pump, a on-site pressure gauge 3 and a second control valve. When in use, the heat inside the generator body is discharged through the return pipeline. The medium water is output, the hot water inside the return pipeline is pressurized by the booster pump, the pressure can be indicated on site by the local pressure gauge 3, the return pipeline is switched on and off by the second control valve, and the return module also includes a secondary pipe, a second booster pump, another local pressure gauge and a third control valve; a secondary pipe is arranged on the return pipeline, a second booster pump is arranged on the secondary pipe, another local pressure gauge is arranged on the secondary pipe, and a third control valve is arranged on the secondary pipe. When in use, the switch of the secondary pipe is controlled by the third control valve, the hot water in the secondary pipe is pressurized by the second booster pump, and the pressure can be indicated on site by another local pressure gauge.

[0025] When working, firstly, the low-temperature hot water is transmitted and processed through the water inlet pipeline, the switch of the water inlet pipeline is controlled and processed through the first control valve, the liquid flow rate in the water inlet pipeline is converted into the rotation speed of the turbine through the flow transmitter 1, and then the rotation speed is converted into an electrical signal proportional to the flow, so as to measure and process the liquid flow in the water inlet pipeline, and the water pressure in the water inlet pipeline is converted into an electric signal through the pressure transmitter 2 to monitor and process the water pressure in the water inlet pipeline, and the water inlet pipeline is vented and moved through the safety valve when the internal pressure of the water inlet pipeline is too large to improve the safety of the water inlet pipeline, so that the low-temperature heat source enters the steam generator through the power flow, and the negative pressure is drawn through the top of the generator body to form a negative pressure vacuum state in the generator, and the negative pressure value is controllable. The low-temperature heat source reduces the boiling point under the condition of small negative pressure, thereby evaporating low-temperature steam.

[0026] After the low-temperature steam is generated, the low-temperature steam in the generator body is output to the heater through the output pipeline to heat the material, so that the low-temperature steam can be used to controllably and slowly heat the material;

[0027] After the low-temperature steam is output, the liquid transmitter is used to measure the volume, liquid height and weight of the liquid inside the generator body based on the principle that the pressures generated by liquids with different specific gravities at different heights are in a linear relationship.

[0028] Through the above steps, the water inlet module is used to transmit the low-temperature hot water to the generator body, and the flow rate and water pressure of the low-temperature hot water are monitored to ensure the safety of the device. The volume, liquid height and weight of the liquid inside the generator body are measured by the measuring module. The low-temperature steam in the generator body is output to the heater to heat the material by the output module. The negative pressure is drawn on the top of the generator body to form a negative pressure vacuum state in the generator. The boiling point of the low-temperature heat source is reduced under the negative pressure condition, and the low-temperature steam is evaporated. The steam generated inside the generator is cooled by the condensation module, and the heat medium is output and returned by the return module.

[0029] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of those skilled in the art without departing from the purpose of the present invention.

Claims

1. A steam generator for producing steam using low-grade hot water, comprising a generator body; characterized in that: It also includes a water inlet module, a measuring module, an output module, a condensation module and a return module; the input end of the generator body is provided with a water inlet pipeline, the water inlet module is connected to the input end of the generator body through the water inlet pipeline, the measuring module is connected to the input end and the output end of the generator body through the measuring pipeline, the output module is connected to the output end of the generator body through the output pipeline, the condensation module is connected to the input end of the generator body through the condensation pipeline, and the return module is connected to the output end of the generator body through the return pipeline.

2. A steam generator for producing steam using low-grade hot water according to claim 1, characterized in that: The water inlet module comprises a first control valve, a flow transmitter (1), a pressure transmitter (2) and a safety valve; the first control valve is arranged on the water inlet pipeline, the flow transmitter (1) is arranged on the water inlet pipeline, the pressure transmitter (2) is arranged on the water inlet pipeline, and the safety valve is arranged on the water inlet pipeline.

3. A steam generator for producing steam using low-grade hot water according to claim 2, characterized in that: The measuring module comprises a liquid level transmitter (4), a first input interface and a first output interface; the first input interface is arranged at one end of the measuring pipeline, the first output interface is arranged at the other end of the measuring pipeline, the liquid level transmitter (4) is arranged on the measuring pipeline, the measuring pipeline is connected to the output end of the generator body via the first input interface, and the measuring pipeline is connected to the input end of the generator body via the first output interface.

4. A steam generator for producing steam using low-grade hot water according to claim 3, characterized in that: The output module includes a heater and a second output interface; one end of the output pipeline is provided with the second output interface, the other end of the output pipeline is provided with a heater, and the output pipeline is connected to the output end of the generator body through the second output interface.

5. A steam generator for producing steam using low-grade hot water according to claim 3, characterized in that: The condensation module includes a second input interface and a pipeline interface; the second input interface is provided at one end of the condensation pipeline, and the pipeline interface is provided at the other end of the condensation pipeline, and the condensation pipeline is connected to the input end of the generator body through the second input interface.

6. A steam generator for producing steam using low-grade hot water according to claim 5, characterized in that: The return module comprises a first booster pump, an on-site pressure gauge (3) and a second control valve; the return pipeline is provided with the first booster pump, the return pipeline is provided with the on-site pressure gauge (3), and the return pipeline is provided with the second control valve.

7. A steam generator for producing steam using low-grade hot water according to claim 1, characterized in that: The return module also includes a secondary pipe, a second booster pump, another local pressure gauge and a third control valve; the return pipeline is provided with a secondary pipe, a second booster pump, another local pressure gauge and a third control valve.

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