CN108036293B - Electromagnetic heat conversion assembly in electromagnetic heating type steam generator - Google Patents
Electromagnetic heat conversion assembly in electromagnetic heating type steam generator Download PDFInfo
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- CN108036293B CN108036293B CN201810064160.0A CN201810064160A CN108036293B CN 108036293 B CN108036293 B CN 108036293B CN 201810064160 A CN201810064160 A CN 201810064160A CN 108036293 B CN108036293 B CN 108036293B
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- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B1/00—Methods of steam generation characterised by form of heating method
- F22B1/28—Methods of steam generation characterised by form of heating method in boilers heated electrically
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Abstract
An electromagnetic heat conversion assembly in an electromagnetic heating type steam generator is arranged in a steam generator main body and comprises a heat insulation body and a columnar electromagnetic heat generator arranged in the heat insulation body, wherein an electromagnetic induction coil pipe is arranged on the periphery of the electromagnetic heat generator; an outer layer heating flow channel, a middle layer heating flow channel and a core part heating flow channel are arranged in the electromagnetic heat generator, one end of the electromagnetic heat generator is a water inlet end, water flows in from the outer layer heating flow channel, the other end of the electromagnetic heat generator is a steam outlet end, and steam is discharged from the core part heating flow channel; the water inlet end is provided with a confluence pressurization cavity, and the water outlet end is provided with a primary confluence cavity. According to the invention, through a mode that the water body circularly flows from outside to inside, the magnetic-thermal conversion efficiency is high, the heating is rapid, the high-temperature steam output is large, the flow rate is high, no pollutant is discharged, the energy is saved, the efficiency is high, and the use is convenient.
Description
Technical Field
The invention belongs to the technical field of steam heating equipment, and particularly relates to an electromagnetic heat conversion assembly in an electromagnetic heating type steam generator.
Background
Steam generators, commonly used equipment such as boilers, are mechanical devices that use the heat energy of a fuel or other energy source to heat water into hot water or steam. Most of the steam generators used in the current industrial workshops are still mainly boilers, heat is generated by burning coal or natural gas to heat water to generate steam, a special boiler room is needed in the mode, the occupied area is large, and meanwhile, a large amount of harmful polluted gas can be generated by burning fuel.
Particularly, in the existing industrial field, such as the paper making industry, large-scale equipment needs a large amount of steam for heating, a steam boiler using a combustion medium must be added, and since the boiler belongs to special equipment, needs to be operated and maintained by professional personnel and needs to be far away from a production area, a long conveying pipeline needs to be laid, the cost is high, meanwhile, the conveying loss caused by a long-distance conveying pipeline is large, and in addition, the problems of air pollution and PM2.5 emission exist due to the use of the combustion medium (usually coal or natural gas). Compared with a large boiler, environmental protection devices such as dust removal, flue gas desulfurization and the like must be added, frequent maintenance is needed to ensure the effectiveness of the equipment, and the maintenance cost is high. Moreover, the operating characteristics of the boiler determine that the boiler responds slowly to the steam demand of the equipment and cannot be connected with an equipment control system.
For some small-sized industrial equipment, rapid steam heating (such as steam sterilization) is needed, and the electric heating mode is mostly adopted, but because resistance wires, infrared tubes and the like are low in heating speed and long in preheating time, the small-batch intermittent work is not facilitated, and the defects of high cost, high power consumption, high control difficulty, high aging speed and the like exist.
In view of the above problems, the present invention further researches a steam generating apparatus in the prior art, and particularly, researches an electromagnetic heat conversion assembly in an electromagnetic heating type steam generator.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides the electromagnetic heat conversion component in the electromagnetic heating type steam generator, which has the advantages of small volume, quick heating, no pollutant discharge, energy conservation, high efficiency and convenient use.
In order to solve the above technical problems, the present invention is achieved by the following technical means.
An electromagnetic heat conversion assembly in an electromagnetic heating type steam generator is arranged in a steam generator main body and comprises a heat insulation body and a columnar electromagnetic heat generator arranged in the heat insulation body, wherein an electromagnetic induction coil pipe is arranged on the periphery of the electromagnetic heat generator; an outer layer heating flow passage, a middle layer heating flow passage and a core part heating flow passage are arranged in the electromagnetic heat generator, and all the flow passages are connected by adopting various confluence cavities to form communication; one end of the electromagnetic heat generator is a water inlet end, water flows in from the outer heating flow channel, the other end of the electromagnetic heat generator is a steam outlet end, and steam is discharged from the core heating flow channel; the water inlet end is provided with a confluence pressurizing cavity for communicating the middle-layer heating flow passage and the core heating flow passage, and the water outlet end is provided with a primary confluence cavity for communicating the outer-layer heating flow passage and the middle-layer heating flow passage; the water inlet end of the electromagnetic heat generator is connected with the water storage tank through a pipeline and a water pump, and the water outlet end of the electromagnetic heat generator is connected with a pipeline for conveying steam.
When the electromagnetic heating type steam generator works, an electromagnetic induction coil tube on the outer wall of the electromagnetic heating generator is electrified to electromagnetically heat the electromagnetic heating generator, an eddy current is formed in the electromagnetic heating generator, the eddy current heats the electromagnetic heating generator, and the heating speed and the position of the eddy current formed in the electromagnetic heating generator can be controlled by controlling the magnitude and the frequency of applied current, so that the aim of quickly and accurately heating is fulfilled. The temperature of the inner core of the electromagnetic heat generator is highest in an initial state, the temperature of the periphery of the electromagnetic heat generator is gradually reduced, water flows through the electromagnetic heat generator and then is quickly converted into saturated steam, the electromagnetic heat generator enters a stable operation state, the temperature of the middle layer of the electromagnetic heat generator is increased to be consistent with that of the core, and the water flows through the electromagnetic heat generator and then can be continuously converted into dry steam or high-temperature steam; therefore, under the operating condition, in water enters into outer heating runner from the end of intaking of electromagnetic heat generator, carry out primary heating, enter into middle level heating runner behind the cavity through elementary converging, further heat, simultaneously because middle level heating runner is in inside, holistic runner area is less than elementary converging the cavity, therefore the velocity of flow of rivers accelerates, then enter into core heating runner through pressure boosting chamber that converges, the temperature is the highest here, water vaporization becomes the vapor of high temperature, simultaneously the velocity of flow grow, pressure grow, the highly compressed vapor of high temperature under this state enters into the pipeline from a steam end, carry workplace. The whole process generates no pollutant, and is energy-saving and environment-friendly.
Preferably, the electromagnetic heat generator is of a cylindrical structure, and the electromagnetic induction coil tubes are distributed on the outer circumferential wall of the electromagnetic heat generator; the outer layer heating flow channel, the middle layer heating flow channel and the core heating flow channel are of a structure which is communicated up and down, and concave-convex structures used for increasing heat exchange area are arranged in the outer layer heating flow channel, the middle layer heating flow channel and the core heating flow channel, and the concave-convex structures can be of wave structures, special-shaped convex groove structures and the like.
Preferably, the inner walls of the flow passages and the confluence cavity are coated with non-hydrophilic high-temperature resistant coatings to avoid scaling and over-rapid corrosion.
Preferably, the single sectional areas of the outer layer heating flow channel and the middle layer heating flow channel are the same, and the number of the outer layer heating flow channels is twice that of the middle layer heating flow channels; the sum of the sectional areas of the middle layer heating flow channels is twice of the sectional area of the core heating flow channel, and the number of the middle layer heating flow channels is six times of the number of the core heating flow channels. The structure ensures that the flow speed of water is doubled after confluence every time, and the output quantity of high-temperature steam is large and fast.
Preferably, the outer layer heating flow channels are annularly distributed on the outer layer of the electromagnetic heat generator, the middle layer heating flow channels are annularly distributed on the middle layer of the electromagnetic heat generator, and the core heating flow channels are arranged at the axis of the electromagnetic heat generator.
Preferably, a water inlet partition plate for isolating the outer heating flow channel and the middle heating flow channel is arranged at the water inlet end of the electromagnetic heat generator, and a confluence pressurizing cavity is arranged in the middle of the water inlet partition plate; a water inlet cavity is formed between the water inlet partition plate and the outer wall of the electromagnetic heat generator, the outer heating runner is communicated with the water inlet cavity, the structure is compact, water is gradually heated from outside to inside, and the magnetic-heat conversion efficiency is high.
Preferably, a plurality of primary converging cavities are arranged on the steam outlet end of the electromagnetic heat generator, each primary converging cavity enables two adjacent outer-layer heating flow channels and one middle-layer heating flow channel to be communicated, the structure enables the two flow channels to converge into one flow channel, and the flow speed is doubled.
Preferably, the cross sections of the outer layer heating flow channel, the middle layer heating flow channel and the core heating flow channel have snowflake-shaped profiles, the number of the outer layer heating flow channels is twelve, the number of the middle layer heating flow channels is six, and the number of the core heating flow channels is one. The sectional area of the single runner of the outer layer is equal to that of the single runner of the middle layer, and the sectional area of the runner of the core part is three times that of the single runner of the middle layer.
Preferably, the surface of the inner wall of the flow channel in the electromagnetic heat generator is provided with the titanium oxide coating, and the titanium oxide coating is a non-hydrophilic material, is high temperature resistant, has good capabilities of cavitation erosion prevention, rust prevention and scale prevention, and prolongs the service life of the product.
Compared with the prior art, the invention has the following beneficial effects: the electromagnetic heat conversion component in the electromagnetic heating type steam generator has the advantages that the magnetic heat conversion efficiency is high, the heating is rapid, the high-temperature steam output is large, the flow speed is high, no pollutant is discharged, the energy is saved, the efficiency is high, and the use is convenient.
Drawings
Fig. 1 is a first schematic view of an electromagnetic heating type steam generator according to the present invention.
Fig. 2 is a schematic diagram of an electromagnetic heating steam generator according to the present invention.
Fig. 3 is a schematic view of the internal structure of the electromagnetic heating type steam generator according to the present invention.
Fig. 4 is a schematic diagram of the internal structure of the electromagnetic heating steam generator according to the present invention.
Fig. 5 is a schematic diagram of the internal structure of the electromagnetic heating steam generator in the present invention.
Fig. 6 is a schematic view of the internal structure of the electromagnetic heating type steam generator according to the fourth embodiment of the present invention.
Fig. 7 is a schematic view of the electromagnetic-thermal conversion assembly with the thermal insulator omitted.
Fig. 8 is a schematic cross-sectional view of the electromagnetic thermal conversion assembly.
Fig. 9 is a schematic view of an operating state of the electromagnetic-thermal conversion assembly.
Fig. 10 is a first perspective view of the electromagnetic heat generator.
Fig. 11 is a second perspective view of the electromagnetic heat generator.
Fig. 12 is a schematic view of the steam outlet end of the electromagnetic heat generator.
Fig. 13 is a schematic view of the water inlet end of the electromagnetic heat generator.
Fig. 14 is an electromagnetic heating schematic.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Referring to fig. 1 to 13, the electromagnetic heating steam generator according to the present invention includes a steam generator main body 01, and a control cabinet 03 disposed on the steam generator main body 01, wherein the control cabinet 03 is provided with a control panel 02, and a circuit control assembly is disposed in the control cabinet 03; the steam generator main body 01 is internally provided with an electromagnetic heat conversion component 6, a power supply component 17, a cooling component, a flash steam and waste heat recovery system, a water storage tank 3, a pipeline for connection and a related sensor; the specific structure thereof is as follows.
The electromagnetic heat conversion assembly 6 comprises a heat insulation body 114 and a columnar electromagnetic heat generator 111 arranged in the heat insulation body 114, wherein an electromagnetic induction coil pipe 113 is arranged on the periphery of the electromagnetic heat generator 111, heat insulation material graphite composite fibers are filled in the heat insulation body 114, and the electromagnetic heat generator 111 is arranged in the electromagnetic heat conversion assembly; an outer layer heating flow passage 104, a middle layer heating flow passage 106 and a core part heating flow passage 108 are arranged in the electromagnetic heat generator 111, the flow passages are connected by adopting various confluence cavities to form communication, one end of the electromagnetic heat generator 111 is a water inlet end, water flows in from the outer layer heating flow passage 104, the other end of the electromagnetic heat generator is a steam outlet end, and steam is discharged from the core part heating flow passage 108; the water inlet end is provided with a pressurizing manifold cavity 116 for communicating the middle layer heating flow passage 106 and the core heating flow passage 108, and the water outlet end is provided with a primary manifold cavity 105 for communicating the outer layer heating flow passage 104 and the middle layer heating flow passage 106; the water inlet end of the electromagnetic heat generator 111 is connected with the water storage tank 3 through a pipeline and a water pump, and the water outlet end of the electromagnetic heat generator 111 is connected with a pipeline for conveying steam. The electromagnetic heat generator 111 in the invention is made of high carbon steel, and the surface of the inner wall of the flow channel is provided with a titanium oxide coating which is a non-hydrophilic material, is high temperature resistant, has good capabilities of cavitation resistance, rust resistance and scale prevention, and prolongs the service life of the product.
The power supply assembly 17 is a medium-frequency power supply, is electrically connected with the electromagnetic induction coil tube 113, and is used for outputting current; the cooling assembly is located above the power supply assembly 17. The cooling assembly comprises a shell, a cooling liquid storage tank 15, a cooling fan 12, a cooling water pump 18, a heat exchanger and a cooling liquid level observation window 16 which are assembled in a matching mode, and is mainly used for cooling a power supply assembly and assisting a gas-liquid separator to cool through cooling liquid circulation.
The system comprises a flash steam and waste heat recovery system, wherein the flash steam and waste heat recovery system comprises a gas-liquid separator 20, an inlet of the gas-liquid separator 20 is connected with a pipeline of low-temperature steam returning after acting, an automatic drainage device is arranged in an outlet of the gas-liquid separator 20 and is connected with a water storage tank 3 through a pipeline, and flash steam for separation of the gas-liquid separator 20 is connected with a flash steam pipeline 109 on an electromagnetic heat generator 111 through a flash steam booster pump 19; in order to maintain stable operation of the gas-liquid separator 20, the cooling assembly may be used to cool the gas-liquid separator 20 to accelerate gas-liquid separation.
In the electromagnetic-thermal conversion module 6 of the present embodiment, the electromagnetic-thermal generator 111 has a cylindrical structure, the electromagnetic coil tube 113 is spirally wound and distributed on the outer circumferential wall of the electromagnetic-thermal generator 111, and the coil tube power receiving interface 112 of the electromagnetic coil tube 113 is electrically connected to the power module 17; the outer layer heating flow passage 104, the middle layer heating flow passage 106 and the core heating flow passage 108 have a structure which is through from top to bottom, and the outer layer heating flow passage 104, the middle layer heating flow passage 106 and the core heating flow passage 108 have a concave-convex structure which is used for increasing the heat exchange area and can be a wave-shaped structure, a raised groove structure and the like. In the present embodiment, the cross sections of the outer layer heating flow path 104, the intermediate layer heating flow path 106, and the core heating flow path 108 have a snowflake-like contour.
In the electromagnetic-thermal conversion assembly 6, the cross-sectional areas of the outer-layer heating flow channels 104 and the middle-layer heating flow channels 106 are the same, the number of the outer-layer heating flow channels 104 is twelve, the number of the middle-layer heating flow channels 106 is six, the cross-sectional area of the core-portion heating flow channel 108 is three times that of the middle-layer heating flow channel 106, and the number of the middle-layer heating flow channels 106 is six times that of the core-portion heating flow channels 108, that is, the number of the core-portion heating flow channels 108 is one. The outer layer heating flow passage 104 is annularly and uniformly distributed on the outer layer of the electromagnetic heat generator 111, the middle layer heating flow passage 106 is annularly and uniformly distributed on the middle layer of the electromagnetic heat generator 111, and the core heating flow passage 108 is arranged at the axis of the electromagnetic heat generator 111.
In addition, a water inlet partition plate 156 for isolating the outer heating flow passage 104 from the middle heating flow passage 106 is arranged on the water inlet end of the electromagnetic heat generator 111, and the region in the middle of the water inlet partition plate 156 is a pressurizing manifold cavity 116; an inlet cavity 115 is formed between the water inlet partition plate 156 and the convex edge of the outer wall of the electromagnetic heat generator, and the outer heating flow passage 104 is communicated with the inlet cavity 115. The steam outlet end of the electromagnetic heat generator 111 is provided with a plurality of primary converging cavities 105, and each primary converging cavity 105 enables two adjacent outer layer heating runners 104 to be communicated with one middle layer heating runner 106.
In this embodiment, the water storage tank 3 is connected to the water inlet chamber 115 of the electromagnetic heat generator 111 through the water supply pump 4 and the pipeline. The cooling assembly comprises a casing 14, a heat radiation fan 12 and cooling fins which are assembled in a matching mode. The water storage tank 3 and the pipeline are provided with sensors selected from the following: a liquid level sensor, a flow sensor, a pressure sensor and a temperature sensor; still be equipped with adjustment mechanism on the pipeline, this adjustment mechanism is selected from: flow regulator, pressure regulator.
Specifically, in the present invention: a water inlet flange connector 1 is arranged on one side of the water storage tank 3 and is used for connecting a water inlet pipeline, and a liquid level controller 2 is also arranged on one side of the water storage tank 3 to prevent the water level in the water storage tank 3 from being over-full; a water supply pump 4 and a pipeline are arranged at the water outlet of the water storage tank 3 in a matching way, and a pressure sensor and a flow sensor 5 for measuring the water supply state are arranged on the pipeline; a steam pressure sensor and a steam flow sensor 7 are arranged on a steam outlet pipeline of the electromagnetic heat conversion component 6, and a steam pressure regulator (arranged on a flange part 8) and an air outlet temperature sensor 9 are also arranged for detecting and regulating the state of output steam. A flash steam temperature sensor 10 is arranged on a pipeline at the air inlet end of the gas-liquid separator 20, and the flash steam temperature sensor 10 is arranged on a flash steam inlet flange connecting piece 11 and is used for detecting the state of recovered flash steam.
A coolant filling port 13 is provided at the upper end of the coolant storage tank 15. A cooling water pump 18 connected by a pipeline is matched at the lower part of the cooling liquid storage tank 15, the cooling water pump 18 is used for conveying cooling liquid to a heating element and a gas-liquid separator 20 cooling position in the intermediate frequency power supply and then conveying the cooling liquid to a cooling assembly, a heat radiation fan 12 in the cooling assembly blows air to take away heat, and then the cooling liquid returns to the cooling liquid storage tank 15. A flash steam booster pump 19 is arranged on the flash steam pipeline 109 at the steam outlet of the gas-liquid separator 20, and the booster pump transmits the flash steam to a water inlet pipe on the electromagnetic heat generator 111.
A one-way valve 102 is arranged on a water inlet pipe of the electromagnetic heat generator 111, the lower end 101 of the one-way valve 102 is connected with a water inlet pipeline, and a flow divider 103 is arranged at the joint of the water inlet pipe and the electromagnetic heat conversion assembly 6 and divides water flow into an outer layer heating flow passage 104; a steam outlet flange member 110 is installed on the top of the electromagnetic heat generator 111 for fitting a steam pipe and the like.
The following is a description of the operating state of the present apparatus.
Referring to fig. 1 and 2, the 1-ton steam generator device according to the present embodiment is mainly composed of a steam generator main body 01, a control cabinet 03 provided on the steam generator main body 01, and a touch control panel 02 provided on the control cabinet 03.
Referring to fig. 3-6, the internal structure of the steam generator main body 01 is that cleaning water is conveyed to the water storage tank 3 through the water inlet flange interface 1, and after the water level reaches the requirement of the liquid level controller 2, the intermediate frequency power supply in the water supply pump 4 and the power supply assembly 17 is started. The pressure sensor and the flow sensor 5 detect that the pumped water meets the set requirement, the electromagnetic heat conversion component 6 is started, and the flowing water is heated to form steam. When the steam pressure sensor and the steam flow sensor 7 detect that the steam reaches the set conditions, the steam pressure regulator 8 acts and the steam is output.
The flash steam returned by the gas equipment returns through the flash steam inlet flange connecting piece 11, and the flash steam temperature sensor 10 monitors the temperature change of the returned flash steam in real time. The returned flash vapor is separated into low-temperature steam and condensed water by the gas-liquid separator 20. The condensed water returns to the water storage tank 3 through the automatic drainer, and the low-temperature steam is input to the water inlet pipe of the electromagnetic heat generator 111 through the flash steam booster pump 19 and is mixed with the water supplied by the water supply pump 4.
The controller controls the rotating speed of the water supply pump 4, the output power of the intermediate frequency power supply and the speed of the flash steam booster pump 19 to achieve stable steam output according to real-time detection parameter signals of the steam pressure sensor, the steam flow sensor 7 and the air outlet temperature sensor 9 and parameter signals monitored by the flash steam temperature sensor 10.
Because the intermediate frequency power supply generates a certain amount of heat during operation, and the gas-liquid separator 20 needs to operate at a stable temperature, the system is designed with a cooling system. The coolant is filled into the coolant storage tank 15 through the coolant filling port 13, and whether the liquid level meets the requirement is checked through the coolant level observation window 16. The cooling water pump 18 delivers the cooling liquid to the cooling position of the heating element and the gas-liquid separator 20 of the medium frequency power supply and then to the cooling module, the heat radiation fan 12 blows air to remove heat, and then the cooling liquid is returned to the cooling liquid storage tank 15.
Fig. 7 to 13 show the internal structure and the working principle of the electromagnetic-thermal conversion assembly 6. The water from the water supply pump 4 is mixed with the flash steam fed back by the flash steam pipeline 109 through the one-way valve 102 to form water mixed with the flash steam. The mixed water is shunted by a diverter 103 and enters an outer layer heating flow passage 104 of an electromagnetic heat generator 111 for first heating, and the heated mixed water is further gasified. Then enters the middle heating runner 106 through the primary converging cavity 105 for secondary heating, and the mixed water is completely gasified. And the steam is heated for the third time from the pressurizing and converging cavity 107 to the core heating runner 108 to form steam with the temperature of about 175 ℃ and the pressure of about 0.8MPa, and the steam is output to gas-using equipment through a pipeline at the steam outlet flange part 110.
Fig. 14 shows the principle of medium frequency induction heating in the present invention: the modulated alternating current generated by the intermediate frequency power supply generates an alternating induced current inside the electromagnetic heat generator 111, and the generated alternating induced current generates an eddy current inside the electromagnetic heat generator 111 to achieve a heating effect. According to the principle of the induced electrical skin effect, currents with different frequencies generate different depths of eddy currents in metal, the depth of the heating position in the electromagnetic heat generator 111 can be changed by controlling the output current and the frequency of the medium-frequency power supply, and the heating effects of different heating channels can be correspondingly changed.
Specifically, when the device of the present invention heats, the control system adjusts the output current and frequency of the intermediate frequency power supply, so that the electromagnetic coil tube 113 generates heat in the core or middle layer of the electromagnetic heat generator 111, and transfers the heat in and out along the radial direction. Due to the structural characteristics of the three-layer heating flow channel inside the electromagnetic heat generator 111, the heating amount per unit area of the outer layer flow channel is minimum, and the heating amount of the middle layer or the core part is maximum. The water flows through the outer layer heating channel at a relatively slow rate due to the maximum number of channels, and flows through the middle layer and the core at a progressively higher rate. The heat generating position depth of the electromagnetic heat generator 111 is controlled and adjusted by matching with a control system, so that flowing water is stably, quickly and accurately converted into steam meeting the use requirement.
In the above configuration, the induction heating is conducted from the inside to the outside of the electromagnetic heat generator 111. Because the induction heating speed is fast matched with a special water flow channel inside the electromagnetic heat generator 111 and multiple shunting and converging actions, the flowing water realizes the gradual heating and pressurizing effect, and finally the steam meeting the requirements is output. By adjusting the magnitude and frequency of the induced current, the depth of the eddy current generated in the electromagnetic heat generator 111 can be controlled, and the rapid and accurate heating control can be realized by matching with the gas demand.
Meanwhile, the system is provided with a flash vapor recycling mechanism, and flash vapor and incoming water are mixed and enter the electromagnetic heat conversion assembly 6, so that the contact surface of water and a heating flow channel in the electromagnetic heat generator 111 is increased, and the heat exchange efficiency is improved.
The device of the invention has high heating speed, can heat the electromagnetic heat generator 111 to 600 ℃ in 1 second, and can instantly convert water into steam. The control is simple, and stable steam can be well output only by controlling the heating power and the water supply pressure of the electromagnetic heat generator 111. The reaction is quick, and the automatic connection control with the air receiving equipment can be realized. The application adaptability is good, and the air supply can be stable for a long time or intermittent. No pollution discharge, the condensed water can be recycled, and the waste heat of the condensed water can be fully utilized. The volume is small, the installation is simple and easy, and the gas-using device can be directly connected in parallel for use. High efficiency and energy saving, and no need of preheating and waiting.
In addition, the electric-heat conversion efficiency of the electromagnetic heating metal transducer can reach more than 97%, water is directly changed into steam when flowing through the transducer, and no other emissions are generated. The inner container of the transducer with the titanium alloy coating is adopted, so that the problem of corrosion of high-temperature steam to metal is solved. The medium-high frequency power supply of the transistor is adopted, the technology is stable and mature, the power per unit volume is large, the efficiency is high, and 1 ton of steam output equipment is 1/5 to 1/10 of the volume of a boiler. Meanwhile, the device can be directly combined with gas-using equipment or integrated into the equipment for use, and a conveying pipeline does not need to be laid. And the heat loss and the maintenance cost of the steam pipeline are reduced. The medium-high frequency power supply adopting the digital voltage regulation and frequency modulation technology realizes the flexible adjustment of the heating power. And the PLC with the networking function is used as the master control, so that the multi-machine online cluster control can be realized. A multi-channel sensor is adopted to collect inlet and outlet pressure and temperature signals, a closed-loop electrical control system is realized by matching with a constant-pressure water supply system and a programmable logic controller, and online joint control with gas equipment can be realized.
Specifically, the electromagnetic heating type steam generator of the present invention has the following advantages and features.
(1) Good adaptability: the equipment has small volume, supports multi-machine linkage and cluster control, can be used for large-scale gas equipment by connecting multiple machines in parallel, and can also be used for small-scale projects by using a single machine. By adopting an advanced control system and a sensor, all running element equipment in the machine can be adjusted according to the output requirement, thereby not only meeting the high-temperature and high-pressure load, but also meeting the application of low temperature and low pressure. The steam generation response speed is high, the cooling system is arranged, continuous and uninterrupted operation at a high load rate can be met, and the steam generator can work intermittently at the same time of starting. The problems of inhibiting the generation of water scale and reducing the corrosion of pipelines are considered during the design of the whole boiler, the stable operation time of the whole boiler is greatly prolonged compared with that of a common boiler, and the maintenance cost is reduced. The whole machine adopts a modular framework, the mechanism is simple, and the maintenance is convenient.
(2) Supporting multi-machine linkage and cluster control: the design size of the whole machine equipment is controlled within 1600mm in length, 600-800mm in width and 2000mm in height, and the steam output of a single machine per hour is in the range of 1-2 steam tons. By taking a 50-ton recycled paper manufacturing line as a reference, 7 to 9 devices are needed, one drying cylinder can be matched with each drying cylinder of the paper manufacturing line, and air supply can be installed nearby at the side of the drying cylinder; multiple steam generators may also be connected in parallel to produce a greater steam output. The system control part is provided with RS485 and RJ45 Ethernet communication interfaces, when a plurality of machines supply air to one device (such as the paper machine example), a plurality of steam generators and the main control system of the gas-using equipment can be connected in a network mode through a communication mode, and flexible online control is realized according to the process requirements of each process of the gas-using equipment or the air consumption. Such as: a certain drying cylinder (such as the paper machine example) needs higher drying speed, and the steam output of the front and rear related drying cylinders is properly corrected and increased under the condition of not changing the corresponding steam generator output, so that the final effect is achieved; or the whole machine line is adjusted fast or slowly (such as a paper machine line change), all the steam generators can be controlled by the network to be synchronously adjusted high or reduced in steam output.
(3) Good safety: the structural characteristics of the whole machine show that after the electromagnetic heat generator stops heating, the residual heat and the residual steam pressure can be quickly released, and the danger caused by accumulated heat and residual pressure accumulation does not exist. Meanwhile, the system adopts a mature low-voltage medium-frequency induction power supply, and the problems of electromagnetic radiation, interference and the like do not exist.
(4) Economy and energy conservation: the whole machine adopts multiple energy-saving measures such as flash steam recycling and waste heat recycling technologies, and the energy consumption of the same output heat (reference boiler) is low. Meanwhile, the electromagnetic heat generator has high conversion efficiency and high speed, and the energy consumption of the whole machine is low by adopting various frequency conversion energy-saving components. After the equipment is operated, only the output of maintenance is needed to be generated, and the loss of the transmission allowance does not exist. The control response speed is high, preheating or cooling is not needed, and the standby loss is reduced. The condensed water is recycled, and the water consumption requirement is reduced.
(5) And (3) environmental protection: the whole machine is powered by standard power frequency electricity and supplied by common softened water. Mainly generates steam and discharges a small amount of condensed water, and the problem of environmental pollution is avoided. The general materials are mostly used in the whole machine manufacturing and mounting processes, and the problems of material treatment, degradation, toxicity and harmful substances do not exist. When the whole machine is maintained, a small amount of heat preservation and insulation materials are consumed, and due to the fact that the application range is small, most of the heat preservation and insulation materials can be recycled, solid wastes are rarely generated. The scale and slag in the pipeline are required to be cleaned during the maintenance of the whole machine, most of the wastes are formed by the condensation of iron rust in the pipeline or gas equipment and inorganic matters in water, and the generated wastes are less in quantity, non-toxic and harmless.
The above-mentioned embodiments are not limited to the above-mentioned embodiments, and the scope of the present invention is defined by the appended claims, and any substitutions, changes and modifications that can be easily made by those skilled in the art are all within the scope of the present invention.
Claims (8)
1. An electromagnetic heat conversion assembly in an electromagnetic heating type steam generator, wherein the electromagnetic heat conversion assembly (6) is arranged in a steam generator main body, and is characterized in that the electromagnetic heat conversion assembly (6) comprises a heat insulation body (114) and a columnar electromagnetic heat generator (111) arranged in the heat insulation body (114), and an electromagnetic induction coil pipe (113) is arranged on the periphery of the electromagnetic heat generator (111); an outer layer heating flow passage (104), a middle layer heating flow passage (106) and a core part heating flow passage (108) are arranged in the electromagnetic heat generator (111), one end of the electromagnetic heat generator (111) is a water inlet end, water flows in from the outer layer heating flow passage (104), the other end of the electromagnetic heat generator is a steam outlet end, and steam is discharged from the core part heating flow passage (108); the water inlet end is provided with a confluence pressurization cavity (116) communicated with the middle-layer heating flow passage (106) and the core heating flow passage (108), and the steam outlet end is provided with a primary confluence cavity (105) communicated with the outer-layer heating flow passage (104) and the middle-layer heating flow passage (106); the water inlet end of the electromagnetic heat generator (111) is connected with the water storage tank (3) through a pipeline and a water pump, and the steam outlet end of the electromagnetic heat generator (111) is connected with a pipeline for conveying steam.
2. An electromagnetic heat conversion assembly in an electromagnetic heating type steam generator according to claim 1, wherein said electromagnetic heat generator (111) is a cylindrical structure, and the electromagnetic coil tube (113) is distributed on the outer circumferential wall of the electromagnetic heat generator (111); the outer layer heating flow channel (104), the middle layer heating flow channel (106) and the core part heating flow channel (108) are of a structure which is communicated up and down, and concave-convex structures used for increasing the heat exchange area are arranged in the outer layer heating flow channel (104), the middle layer heating flow channel (106) and the core part heating flow channel (108).
3. An electromagnetic heat conversion assembly in an electromagnetic heating type steam generator according to claim 1, wherein the cross-sectional areas of the outer heating flow paths (104) and the middle heating flow paths (106) are the same, and the number of the outer heating flow paths (104) is twice as many as the number of the middle heating flow paths (106); the sectional area of the core heating flow channel (108) is three times that of the middle layer heating flow channel (106), and the number of the middle layer heating flow channels (106) is six times that of the core heating flow channels (108).
4. An electromagnetic heat conversion assembly in an electromagnetic heating type steam generator according to claim 2, wherein said outer layer heating flow path (104) is annularly distributed on the outer layer of the electromagnetic heat generator (111), said middle layer heating flow path (106) is annularly distributed on the middle layer of the electromagnetic heat generator (111), and said core heating flow path (108) is provided at the axial center of the electromagnetic heat generator (111).
5. The electromagnetic heat conversion assembly in the electromagnetic heating type steam generator according to claim 4, wherein the water inlet end of the electromagnetic heat generator (111) is provided with a water inlet partition plate (156) for isolating the outer heating flow passage (104) and the middle heating flow passage (106), and the region in the middle of the water inlet partition plate (156) is the confluence pressure increasing chamber (116); a water inlet cavity (115) is formed between the water inlet partition plate (156) and the outer wall of the electromagnetic heat generator, and the outer heating flow passage (104) is communicated with the water inlet cavity (115).
6. An electromagnetic heat conversion assembly in an electromagnetic heating type steam generator according to claim 4, wherein the steam outlet end of the electromagnetic heat generator (111) is provided with a plurality of primary manifold chambers (105), and each primary manifold chamber (105) connects two adjacent outer heating flow channels (104) and a middle heating flow channel (106).
7. An electromagnetic heat conversion assembly in an electromagnetic heating type steam generator according to any one of claims 1 to 3, wherein the outer heating flow passage (104), the middle heating flow passage (106), and the core heating flow passage (108) have snowflake-like profiles in cross section, and the number of the outer heating flow passages (104) is twelve, the number of the middle heating flow passages (106) is six, and the number of the core heating flow passages (108) is one.
8. An electromagnetic heat conversion assembly in an electromagnetic heating type steam generator according to claim 1, wherein a titanium oxide coating is provided on an inner wall surface of a flow path in the electromagnetic heat generator (111).
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