CN103743098A - Efficient solid electric thermal storage boiler - Google Patents

Abstract

The invention relates to a high-efficiency solid electric thermal storage boiler, which is composed of a thermal storage body, an inner thermal insulation layer, a circulation fan, a low-temperature air circulation channel, a high-temperature air circulation channel, a heat exchanger, and an outer thermal insulation layer; The outer surface of the air circulation channel is built with refractory insulation bricks to form an inner insulation layer, so that the heat energy in the regenerator can only flow into the heat exchanger from the high-temperature air circulation channel, and the high-temperature air enters the heat exchanger under the gravity of the circulation fan to do work and cool down. The formed low-temperature air flows back to the No. 1 channel hole through the low-temperature air circulation channel. After absorbing heat in the channel hole, the low-temperature air becomes high-temperature air and enters the high-temperature air circulation channel through the No. 2 channel hole to circulate and perform work. The invention creates conditions for the solid electric heat storage boiler to break through the heat storage temperature of 800 degrees Celsius, more than doubles the heat storage capacity of the heat storage body, reduces the input weight of the heat storage material, reduces the manufacturing cost of the electric heat storage boiler, and saves The equipment takes up space, which improves the heat conversion efficiency of the equipment and reduces the electricity cost.

Description

High Efficiency Solid Electric Heat Storage Boiler

technical field

The invention relates to a high-efficiency solid electric heat storage boiler, which can reduce the heat dissipation loss of the solid electric heat storage boiler and improve the heat energy utilization rate of the electric heat storage boiler.

Background technique

my country's smog weather is very serious. Installing solid electric heat storage boilers to use off-peak electricity and abandoning wind power for heat storage to replace coal-fired boilers is an effective way to clean the atmosphere and reduce smog weather. In recent years, some progress has been made in this area, but in practical applications, high-power, high-temperature output electric heat storage boilers with heat storage body temperatures above 800 degrees Celsius are required. The scheme will increase the heat loss of equipment heat preservation, reduce the heat conversion efficiency, and increase the cost of electric heat storage. Designing a new type of high-efficiency solid electric heat storage boiler with double insulation layers is the key to solving the existing problems.

Contents of the invention

The present invention provides a high-efficiency solid electric heat storage boiler aiming at the problems existing in the above-mentioned prior art, and improves the utilization rate of electric energy.

Technical scheme of the present invention is as follows:

A high-efficiency solid electric thermal storage boiler is characterized in that it is composed of a thermal storage body, an inner insulation layer, a circulation fan, a low-temperature air circulation channel, a high-temperature air circulation channel, a heat exchanger, and an outer thermal insulation layer; There are multiple layers in the normal direction of the corresponding two end faces, each layer has several groups of uniformly arranged channel holes, the electric heater is assembled in the channel hole, and the terminal of the electric heater extends out of the channel hole and is connected outside the channel hole to form a For the power supply circuit, the two ends of each channel hole arranged evenly are No. 1 channel hole and No. 2 channel hole. The No. 2 channel hole is connected to the high-temperature air circulation channel, and the No. 2 channel hole is connected to the low-temperature air circulation channel. No. 1 passage hole; the inner insulation layer is set on the outer surface of the heat storage body except the passage hole; a low-temperature air circulation passage is set between the inner insulation layer, the outer insulation layer and the foundation; the circulation fan is composed of a centrifugal fan or an axial fan It is the power to complete heat exchange; the outer insulation layer is composed of heat-resistant metal plates or inner and outer structural layers made of heat-resisting refractory materials and heat-insulating and refractory filling materials; the high-temperature air circulation channel is made of heat-resistant metal The geometric body connected with the inner insulation layer formed by plate assembly or masonry made of insulating refractory materials.

The heat accumulator is built by sintering silicate materials into structural parts or solidified by casting materials.

The inner thermal insulation layer is made of metal plates for thermal insulation bridge structure assembly, or built with refractory thermal insulation bricks, or poured with thermal insulation castable formwork, or wrapped with refractory thermal insulation coils, or coated with thermal insulation paint , or made of refractory fiber spraying to achieve the purpose of blocking the thermal energy of the heat storage body from overflowing from the inner insulation layer.

The circulation fan drives the low-temperature air through the low-temperature air circulation channel and sends it into the No. 1 heat release channel hole, flows out of the heat storage body from the No. 2 heat release channel hole, and then heats up, and outputs it to the high-temperature air circulation channel to cool down and flow back through the heat exchanger. To the low-temperature air circulation channel to form a closed-loop thermal energy output system.

The low-temperature air circulation channel is set between the inner insulation layer and the outer insulation layer, and the purpose is to use low-temperature flowing air to reduce the temperature of the outer surface of the inner insulation layer, so as to reduce the gap between the inner structural layer of the outer thermal insulation layer and the outer structural layer of the outer thermal insulation layer. The temperature gradient between them reduces the heat dissipation loss of the outer insulation layer.

The beneficial effects of the present invention are:

The high-efficiency solid electric thermal storage boiler of the present invention is designed with double insulation layers and introduces low-temperature circulating air below 150 degrees Celsius between the two insulation layers, and the outer surface of the inner insulation layer continuously brings heat into the circulation system under the action of low-temperature circulating air. The inner thermal insulation layer assumes the main thermal insulation function, which reduces the thermal insulation loss of the outer thermal insulation layer due to the increase of the heat storage temperature of the heat storage body. This invention created conditions for the heat storage temperature of solid electric heat storage boilers to exceed 800 degrees Celsius, which more than doubled the heat storage capacity of the heat storage body, reduced the input weight of heat storage materials, and reduced the manufacturing cost of electric heat storage boilers. Cost, save the space occupied by the equipment, improve the heat conversion efficiency of the equipment and reduce the cost of electricity.

Description of drawings

Fig. 1 is a schematic plan view of the structure of the present invention.

Fig. 2 is the elevation schematic diagram of structure of the present invention

In the figure, 1. heat storage body, 2. inner insulation layer, 3. circulation fan, 4. low temperature air circulation channel, 5. high temperature air circulation channel, 6. heat exchanger, 7. inner structure layer, 8. outer structure Layer, 9, external insulation filling material, 10, No. 1 channel hole, 11, No. 2 channel hole.

Detailed ways

The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

Example 1

The structure of the high-efficiency solid electric heat storage boiler of the present invention is shown in Figure 1 and Figure 2. The outer surfaces of the heat storage body 1 and the high-temperature air circulation channel 5 are built with refractory insulation bricks to form an inner insulation layer 2, so that the heat storage body 1 The heat energy can only flow into the heat exchanger 6 from the high-temperature air circulation channel 5, and the high-temperature air enters the heat exchanger 6 under the gravity of the circulation fan 3 to do work, and the low-temperature air formed by cooling flows back to the No. 1 channel hole 10 through the low-temperature air circulation channel 4 After absorbing heat in the channel hole, the low-temperature air becomes high-temperature air and enters the high-temperature air circulation channel 5 through the second channel hole 11 to circulate and release heat.

Claims (5)

1. A high-efficiency solid electric heat storage boiler, characterized in that: it is composed of a heat storage body, an inner insulation layer, a circulation fan, a low-temperature air circulation channel, a high-temperature air circulation channel, a heat exchanger, and an outer insulation layer; heat storage The body is provided with multiple layers in the normal direction of the corresponding two end faces, and each layer has several groups of uniformly arranged channel holes, the electric heater is assembled in the channel hole, and the terminal of the electric heater extends out of the channel hole. Connected into a power supply circuit, the two ends of the uniformly arranged channel holes are the No. 1 channel hole and the No. 2 channel hole. The No. 2 channel hole is connected to the high-temperature air circulation channel and connected to the low-temperature air circulation channel. The No. 1 channel hole; the inner insulation layer is set on the outer surface of the heat storage body except the channel hole; a low-temperature air circulation channel is provided between the inner insulation layer, the outer insulation layer and the foundation; the circulation fan is composed of a centrifugal fan or an axial flow The composition of the fan is the power to complete the heat exchange; the outer insulation layer is composed of an inner structural layer and an outer structural layer made of heat-resistant metal plates or masonry made of insulating refractory materials and insulating and refractory filling materials; the high-temperature air circulation channel is made of durable Thermal sheet metal assembly or masonry made of insulating refractory material connected to the geometry of the inner insulation. 2. The high-efficiency solid electric heat storage boiler according to claim 1, characterized in that: the heat storage body is sintered with silicate materials to form structural parts for masonry or solidified with castables. 3. The high-efficiency solid electric heat storage boiler according to claim 1, characterized in that: the inner insulation layer is assembled with a heat-insulating broken bridge structure made of metal plates, or built with refractory insulation bricks, or made of insulation The pouring material is poured in formwork, or wrapped with refractory insulation coils, or coated with insulation paint, or made by spraying refractory fibers. 4. The high-efficiency solid electric heat storage boiler according to claim 1, characterized in that: the circulation fan drives low-temperature air through the low-temperature air circulation channel and sends it into the port of the No. 1 channel hole. After the port flows out, the temperature rises, and the output is sent to the high-temperature air circulation channel, which is cooled by the heat exchanger and returned to the low-temperature air circulation channel to form a closed-loop heat energy output system. 5. The high-efficiency solid electric thermal storage boiler according to claim 1, characterized in that: said low-temperature air circulation channel is set between the inner insulation layer, the outer insulation layer and the foundation.

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