CN205305158U - Electric induction formula molten salt heater - Google Patents

Abstract

An electric induction molten salt heater, comprising a cylinder body, a molten salt inlet and a molten salt outlet, a spiral coil is arranged inside the cylinder, and the upper and lower parts of the spiral coil are respectively connected to the molten salt inlet and the molten salt Outlet connection; the top of the cylinder is provided with an induction frequency generating power supply, and the two are fixedly connected by a flange; the left side of the induction frequency generating power supply is provided with a wire inlet; the inner wall of the cylinder is provided with an induction coil , After the alternating current passes through the induction coil, an alternating magnetic field is generated, so that the spiral coil placed in the magnetic field produces a thermal effect, converts electrical energy into heat energy, and heats the molten salt flowing in the spiral coil. The utility model has a fast heating rate, the metal material of the spiral coil is heated by electromagnetic induction, and the heat is transferred to the molten salt fluid in the tube, and the required preheating time is short; the operating cost is low, and the cylinder of the heater does not generate heat , can withstand temperatures above 500 ° C, so that the equipment has a long service life and low maintenance costs.

Description

An electric induction molten salt heater

technical field

The utility model belongs to the field of molten salt heating equipment, in particular to an electric induction type molten salt heater.

Background technique

Molten salt electric heater is one of the key equipment of energy storage systems such as "coal to electricity" molten salt heat storage heating system, molten salt heat storage peak-shaving power station, etc. Its function is to convert electric energy into heat energy, and then heat energy in the form of sensible Stored in molten salt working fluid. The performance parameters of the molten salt electric heater have a direct impact on the reliable operation of the molten salt heat storage system.

At present, the molten salt electric heater mainly adopts the resistance heating method, that is, after the current passes through the electric heating tube, heat energy is generated under the action of the Joule effect to heat the molten salt working medium. However, the voltage level of the resistance molten salt heater is relatively small, and the heat exchange area and number of the electric heating tubes increase with the increase of the heating power, and the volume of the heater also increases with the increase of the heating power. As a result, the molten salt electric heater of a large-scale energy storage system occupies a very large area, and the construction investment cost is relatively high.

Utility model content

In order to solve the shortcomings of the existing technology, the utility model provides an electric induction molten salt heater, which adopts electromagnetic induction heating technology, and has the beneficial effects of fast heating rate, low operating cost, safety and reliability.

In order to achieve the above purpose, the technical solution adopted by the utility model is: an electric induction type molten salt electric heater, including a cylinder body 1, a spiral coil tube 2, a coil tube bracket 3, a molten salt inlet 4, a molten salt outlet 5, Induction coil 6, flange 7, induction frequency generating power supply 8 and wire inlet 9.

The inside of the cylinder 1 is provided with a spiral coil 2, the spiral coil 2 is fixed by a coil bracket 3, the upper part of the spiral coil 2 is connected with the molten salt inlet 4, and the lower part of the spiral coil 2 Connect with molten salt outlet 5;

The top of the cylinder 1 is provided with an induction frequency generating power supply 8, and the two are fixedly connected by a flange 7; the left side of the induction frequency generating power supply 8 is provided with a wire inlet 9;

The inner wall surface of the cylinder 1 is provided with an induction coil 6. After the alternating current passes through the induction coil 6, an alternating magnetic field is generated, so that the spiral coil 2 placed in the magnetic field has a thermal effect and converts electrical energy into heat energy. , and heat the molten salt flowing in the spiral coil 2; the cylinder 1 is a cylinder.

Compared with the prior art, the utility model has the following beneficial effects:

1. The heating rate is fast, and the metal material of the spiral coil is heated by electromagnetic induction, and the heat is transferred to the molten salt fluid in the tube, and the required preheating time is short.

2. Low operating cost, the cylinder of the heater does not generate heat and can withstand temperatures above 500°C, so the equipment has a long service life and low maintenance costs.

3. Safe and reliable. Because the surface of the heater is at normal temperature, it not only reduces the cost of equipment insulation facilities, but also avoids safety accidents caused by workers touching the equipment, thus greatly improving the working environment of the machine room.

Description of drawings

Fig. 1 is the structural representation of the utility model.

In the figure: 1. Cylinder, 2. Spiral coil, 3. Coil support, 4. Molten salt inlet, 5. Molten salt outlet, 6. Induction coil, 7. Flange, 8. Induction frequency generating power supply, 9. Wire import.

detailed description

Below in conjunction with accompanying drawing 1 and specific embodiment the utility model is described in further detail.

Example:

An electric induction molten salt heater, comprising a cylinder 1, a spiral coil 2, a coil support 3, a molten salt inlet 4, a molten salt outlet 5, an induction coil 6, a flange 7, an induction frequency generating power supply 8 and Wire import9.

The cylinder 1 is a cylinder with a spiral coil 2 inside, the spiral coil 2 is fixed by a coil bracket 3, the upper part of the spiral coil 2 is connected to the molten salt inlet 4, and the spiral coil 2 is connected to the molten salt inlet 4. The lower part of the pipe 2 is connected with the molten salt outlet 5;

The top of the cylinder 1 is provided with an induction frequency generating power supply 8, and the two are fixedly connected by a flange 7; the left side of the induction frequency generating power supply 8 is provided with a wire inlet 9;

The inner wall surface of the cylinder 1 is provided with an induction coil 6. After the alternating current passes through the induction coil 6, an alternating magnetic field is generated, so that the spiral coil 2 placed in the magnetic field has a thermal effect and converts electrical energy into heat energy. , and heat the molten salt flowing in the spiral coil 2.

Claims (3)

1. an electric induction formula molten salt heater, (5) are exported including cylinder (1), fused salt entrance (4) and fused salt, it is characterized in that, described cylinder (1) is internal is provided with spiral coil (2), the top of described spiral coil (2) is connected with fused salt entrance (4), and the bottom of described spiral coil (2) exports (5) with fused salt and is connected; Described cylinder (1) top is provided with induction frequencies generation power supply (8), adopts the fixing connection of flange (7) between the two; Described induction frequencies generation power supply (8) left side is provided with electric wire import (9); The interior sidewall surface of described cylinder (1) is provided with electric induction coil (6), alternating current is by after electric induction coil (6), produce alternating magnetic field, thus there is heat effect in the spiral coil being placed in this magnetic field (2), convert electrical energy into heat energy, and heat the fused salt of flowing in spiral coil (2).

2. a kind of electric induction formula molten salt heater according to claim 1, it is characterised in that described spiral coil (2) adopts coil pipe supporting stand (3) to fix.

3. a kind of electric induction formula molten salt heater according to claim 1, it is characterised in that described cylinder (1) is cylinder.