Heating medium electric heating furnace

Abstract

The utility model discloses a heating medium electric heating furnace which comprises an electric heater and a gas-liquid flash evaporator, the electric heater comprises a plurality of electric heating elements, the plurality of electric heating elements are connected with a power supply, the gas-liquid flash evaporator comprises a lower boiler barrel and an upper boiler barrel, the lower boiler barrel and the upper boiler barrel are both closed barrels, and the lower boiler barrel and the upper boiler barrel are connected with each other. The upper boiler barrel is in fluid communication with the lower boiler barrel through a plurality of connecting pipelines, the plurality of electric heating elements are installed in the lower boiler barrel, a heating medium inlet is formed in the bottom of the upper boiler barrel, and a heating medium outlet is formed in the top of the upper boiler barrel. The electric heater further comprises a junction box, the electric heating elements are electric heating rods, and the plurality of electric heating elements are connected with a power supply through the junction box and a cable. And the heat flux density of the electric heating rod is less than or equal to 1.5 W / cm < 2 >. The utility model has the advantages of low heat intensity, compact structure, high safety and long service life.

Description

Technical Field

[0001] The utility model relates to a heating furnace, in particular to an electric heating furnace using gas-liquid heat medium. Background Art

[0002] In the past, old-style gas-liquid heat medium heating furnaces were all of the oil-fired and gas-fired type, but they had the following disadvantages during use: (1) Oil-fired and gas-fired are fossil fuels, which put great pressure on environmental protection; (2) The flash evaporation system and the boiler body are separated, the pipelines are complex, and the control is cumbersome; (3) The flame intensity of oil-fired and gas-fired is high, and the heat medium inside the furnace tube is easily gasified and carbonized, which has low safety and short service life. Summary of the invention

[0003] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide a heat medium electric heating furnace with simple pipelines, convenient control, low thermal intensity, compact structure and high safety.

[0004] In order to solve the above technical problems, the utility model adopts such a heat medium electric heating furnace, including an electric heater and a gas-liquid flash evaporator, the electric heater includes a plurality of electric heating elements, the plurality of electric heating elements are connected to a power supply, the gas-liquid flash evaporator includes a lower drum and an upper drum, the lower drum and the upper drum are both closed cylinders, the upper drum is fluidly connected to the lower drum through a plurality of connecting pipes, the plurality of electric heating elements are installed in the lower drum, a heat medium inlet is provided at the bottom of the upper drum, and a heat medium outlet is provided at the top of the upper drum.

[0005] As a preferred embodiment of the utility model, the electric heater further comprises a junction box, the electric heating element is an electric heating rod, and the plurality of electric heating elements are connected to a power source via the junction box and cables.

[0006] As a preferred embodiment of the utility model, a sewage outlet and a saddle are provided at the bottom of the lower boiler drum, a maintenance manhole is provided at one end of the upper boiler drum, a safety valve interface is also provided at the top of the upper boiler drum, and a heat medium liquid level gauge is provided on the body of the upper boiler drum.

[0007] As a preferred embodiment of the present invention, the heat flux density of the electric heating rod is less than or equal to 1.5 W / cm 2 .

[0008] After adopting the above structure, the utility model has the following beneficial effects:

[0009] The utility model uses the gas-liquid flash evaporator as the boiler body, that is, the boiler body and the flash evaporation system are integrated into one, the pipeline is simple, the control is convenient and the control precision is high, the safety is high and the structure is compact.

[0010] The utility model adopts an electric heating element, which is preferably an electric heating rod, and the heat flux density of the electric heating rod is preferably less than or equal to 1.5W / cm 2 , low thermal strength, avoids gas phase carbonization problems, and improves the safety and service life of the system.

[0011] The utility model adopts electric heating, does not need to consider environmental emission and other issues, belongs to clean energy, is easy to maintain, and has a wide range of applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The specific implementation of the utility model is further described in detail below in conjunction with the accompanying drawings.

[0013] Figure 1 The utility model is a structural schematic diagram of a heat medium electric heating furnace. Implementation

[0014] See also Figure 1 A heat medium electric heating furnace shown in the figure comprises an electric heater 1 and a gas-liquid flash evaporator 2, wherein the electric heater 1 comprises a plurality of electric heating elements 1-1, which are connected to a power source, and the gas-liquid flash evaporator 2 comprises a lower drum 2-1 and an upper drum 2-2, wherein both the lower drum 2-1 and the upper drum 2-2 are closed cylinders, and the upper drum 2-2 is fluidically connected to the lower drum 2-1 through a plurality of connecting pipes 2-3, and there are four connecting pipes 2-3 shown in the figure, and the plurality of electric heating elements 1-1 are installed in the lower drum 2-1, and a heat medium inlet 2-4 is provided at the bottom of the upper drum 2-2, and a heat medium outlet 2-5 is provided at the top of the upper drum 2-2. The heat medium of the utility model can be a gas phase heat medium or a liquid phase heat medium, such as a biphenyl-biphenyl ether mixture, hydrogenated terphenyl, heat transfer oil, etc.

[0015] As a preferred embodiment of the present invention, Figure 1 As shown, the electric heater 1 also includes a junction box 1-2, the electric heating element 1-1 is an electric heating rod, and the plurality of electric heating elements 1-1 are connected to a power source through the junction box 1-2 and a cable. In implementation, it is preferred that one end of the plurality of electric heating rods is fixedly mounted on the flange 3 in a radial direction, and the flange 3 is sealed and fixedly mounted on the end of the lower drum 2-1; of course, the electric heating rod can also be placed as a whole in the lower drum 2-1.

[0016] As a preferred embodiment of the present invention, Figure 1As shown, a sewage outlet 2-6 and a saddle 2-7 are provided at the bottom of the lower drum 2-1. There are two saddles 2-7 shown in the figure, which are used to place the gas-liquid flash evaporator 2. A maintenance manhole 2-8 is provided at one end of the upper drum 2-2, a safety valve interface 2-9 is also provided at the top of the upper drum 2-2, and a heat medium level meter 2-10 is provided on the body of the upper drum 2-2.

[0017] As a preferred embodiment of the present invention, Figure 1 As shown, the heat flux density of the electric heating rod is less than or equal to 1.5 W / cm 2 .

[0018] As a preferred working mode of the utility model, the electric heating rod emits heat after being energized, and the heat is absorbed by the heat medium in the lower drum 2-1. After the heat medium absorbs the heat, the temperature and pressure increase, and it flashes into a gas phase in the upper drum 2-2. The heat medium in the gas phase can heat the process and realize the heat exchange effect of the process.

[0019] After trial, the utility model has the advantages of simple pipeline, convenient control, low thermal strength, compact structure, high safety, long service life, avoiding gas phase carbonization problem, improving the safety of the system, and achieving good practical effect.

Claims

1. A heat medium electric heating furnace, Features: The invention comprises an electric heater (1) and a gas-liquid flash evaporator (2). The electric heater (1) comprises a plurality of electric heating elements (1-1), and the plurality of electric heating elements (1-1) are connected to a power source. The gas-liquid flash evaporator (2) comprises a lower drum (2-1) and an upper drum (2-2). The lower drum (2-1) and the upper drum (2-2) are both closed drums. The upper drum (2-2) is fluidically connected to the lower drum (2-1) via a plurality of connecting pipes (2-3). The plurality of electric heating elements (1-1) are installed in the lower drum (2-1). A heat medium inlet (2-4) is provided at the bottom of the upper drum (2-2), and a heat medium outlet (2-5) is provided at the top of the upper drum (2-2).

2. The heat medium electric heating furnace according to claim 1, Features: The electric heater (1) further comprises a junction box (1-2); the electric heating element (1-1) is an electric heating rod; and the plurality of electric heating elements (1-1) are connected to a power source via the junction box (1-2) and a cable.

3. The heat medium electric heating furnace according to claim 1 or 2, Features: A sewage outlet (2-6) and a saddle (2-7) are provided at the bottom of the lower drum (2-1), a maintenance manhole (2-8) is provided at one end of the upper drum (2-2), a safety valve interface (2-9) is also provided at the top of the upper drum (2-2), and a heat medium level gauge (2-10) is provided on the body of the upper drum (2-2).

4. The heat medium electric heating furnace according to claim 2, Features: The heat flux density of the electric heating rod is less than or equal to 1.5 W / cm 2 .

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