CN106940086A - Method of the coal-fired boiler reform into electrical heating solid heat storage boiler - Google Patents

Abstract

The invention provides a method for transforming a coal-fired boiler into an electric heating solid heat storage boiler, which relates to the technical field of heating equipment transformation, and includes the following steps in sequence: (i) dismantling the coal-fired boiler; (ii) building a base; (iii) Install the supporting device; (ⅳ) install the heat storage device; (ⅴ) fix the heat storage device; (ⅵ) install the insulation layer; (ⅶ) install the furnace shell; (ⅷ) install the driver; (ⅸ) cover the back. It solves that in the prior art, the coal-fired boiler is transformed into an oil-fired boiler, which emits polluted gas and causes environmental pollution. The coal-fired boiler is transformed into a gas-fired boiler, which is prone to explosion, and the coal-fired boiler is transformed into a biomass boiler. The operating state is not good. Stable technical issues. The invention uses the forced convection heat exchange between the high-temperature gas heated by the regenerator in the furnace body and the water-cooled wall in the furnace body, and the radiation heat exchange between the heat-storage body and the water-cooled wall to heat the low-temperature water in the water-cooled wall. There is no emission pollution in the process, which is convenient for management.

Description

Method for transforming coal-fired boiler into electric heating solid heat storage boiler

technical field

The invention relates to the technical field of heating equipment transformation, in particular to a method for transforming a coal-fired boiler into an electric heating solid heat storage boiler.

Background technique

A coal-fired boiler refers to a boiler that burns coal as fuel. After the coal is burned in the furnace, the cold water is turned into hot water for people to use. Coal-fired boilers are classified according to their uses, mainly including burning water boilers for supplying boiling water, burning hot water boilers for heating and bathing, coal-fired steam boilers for steam supply, and coal-fired heat-conducting oil boilers for cooking and drying. The application scope of the above-mentioned boilers Wide range, long service life and low operating cost, it provides a lot of convenience for people's life. However, the fuel of coal-fired boilers is mainly solid fuel coal. During the combustion of coal, there is insufficient combustion, which reduces the thermal efficiency of coal-fired boilers, and coal will produce a large amount of smoke, sulfur and nitrogen oxides after combustion. The discharge of these harmful gases into the atmosphere will cause serious harm to human life and the ecological environment. For this reason, people install a coal feeding system in the boiler to make the coal burn more fully, which greatly improves the thermal efficiency of the coal-fired boiler. The flue gas meets the emission standards of the environmental protection department, effectively avoiding the emission of harmful gases. However, the above-mentioned coal loading system needs to pulverize the coal into powder and process the harmful gas more complicatedly, it is not easy to manage during operation, and it also consumes a lot of investment cost, so the effect is not ideal. According to the National Development and Reform Commission, the Ministry of Environmental Protection, the Ministry of Finance, the General Administration of Quality Supervision, Inspection and Quarantine, the Ministry of Industry and Information Technology, the State Management Bureau, and the National Energy Administration issued the "Coal-fired Boiler Energy Conservation and Environmental Protection Comprehensive Improvement Project Implementation Plan" at the end of October 2014 , the implementation content requires that in the areas covered by the urban heat pipe network, speed up the elimination of small scattered coal-fired boilers, promote urban central heating, gradually prohibit the production and use of hand-fired boilers and other outdated furnace types, and eliminate outdated coal-fired boilers. A large number of idle coal-fired boilers.

In response to the above problems, people transform coal-fired boilers into oil-fired boilers, transform coal-fired boilers into gas-fired boilers, or transform coal-fired boilers into biomass boilers. Oil-fired boilers mainly burn diesel, engine oil, and kerosene, which can improve combustion efficiency, but they still produce carbon dioxide and sulfide emissions. In addition, because oil-fired boilers are prone to water and air ingress, frequent failures occur, and fuel transportation and storage The risk is high, prone to accidents, need to be extra careful. The main fuel of gas-fired boilers is gas, which can be divided into natural gas boilers, city gas boilers, coke oven gas boilers, liquefied petroleum gas boilers and biogas boilers according to fuels. Gas-fired boilers can fully burn fuel, with high thermal efficiency and safe operation However, during the operation of gas-fired boilers, due to improper ignition, gas pipeline leakage, improper operation, and the water in the furnace is burned out, explosion accidents will occur. When the explosion occurs, it is mainly the explosion in the furnace or the entire furnace body. explode. Biomass boilers refer to boilers that use biomass energy as fuel. The energy mainly comes from organic matter, plant or animal manure. The use of biomass boilers makes the furnace space larger, and the internal structure makes the biomass fuel burn more fully. It can avoid the pollution caused by sulfide emissions, but the fuel will still produce carbon dioxide gas during the combustion process, which will destroy the ozone layer and intensify the greenhouse effect. In addition, the biomass boiler is also prone to slagging during the combustion process, which increases the boiler The maintenance cost and maintenance workload during operation, and when the slagging of the boiler is serious, the biomass boiler will be forced to reduce the load and eventually be forced to shut down.

Contents of the invention

The purpose of the present invention is to provide a method for transforming a coal-fired boiler into an electric heating solid heat storage boiler, so as to solve the existing problems in the prior art. The coal-fired boiler is transformed into an oil-fired boiler, and the exhaust gas pollution is large, and the fuel is transferred and stored. During the process, the safety is low; the coal-fired boiler is transformed into a gas-fired boiler, which is prone to explosion; the transformation of a coal-fired boiler into a biomass boiler is likely to cause pollution, and the operation effect of the entire boiler is poor.

A method for transforming a coal-fired boiler into an electrically heated solid heat storage boiler provided by the present invention comprises the following steps in sequence:

(ⅰ) Removal of coal-fired boilers

Remove the front furnace wall, front shell, front arch, chimney, flue gas duct, dust collector, induced draft fan, gray truck, economizer, blower fan, air supply pipe, and left furnace wall of the boiler in sequence , Boiler left shell, ash hopper, ash conveyor, fire grate, boiler base and coal hopper, after disassembly, the remaining rear shell, right shell, left shell, top shell, Furnace wall, water wall, upper drum, lower drum and rear arch;

(ii) Masonry base

After dismantling the coal-fired boiler, build the base of the furnace body;

(iii) Install the supporting device

The support device includes a first support frame, a second support frame, a third support frame and a support net;

The first support frame is welded on the upper end of the support net, and the second support frame and the third support frame are welded on the lower end of the support net;

(ⅳ) Install heat storage device

Laying the heat storage device on the support net;

(v) Fixed heat storage device

Install a wood plank layer on one side of the heat storage device, build a cement layer on one side of the wood plank layer, and make one side of the heat storage device pass through the wood plank layer and the cement layer in sequence;

(ⅵ) Install insulation layer

Lay an insulation layer on one side of the furnace body;

(ⅶ) Install the furnace shell

Install the left side shell of the furnace body on the outside of the cement layer, make the heat storage device pass through the left side shell, and install the front side shell and the right side shell of the furnace body;

(ⅷ) Install the driver

The driver is installed on one side of the furnace body, and the driver is connected to the first conveying pipeline outside the furnace body;

(ⅸ) back cover

Install the bottom shell of the boiler.

Further, the base adopts two refractory cement bases, and the two refractory cement bases are respectively built on the bottom of the boiler.

Further, the support device also includes a fourth support frame;

The fourth support frame is welded to the upper end of the third support frame, and the support net is welded to the fourth support frame.

Further, the first delivery pipe of the boiler is provided with an air outlet, and the air outlet is connected to the lower part of the heat storage device.

Further, the heat storage device includes a heater and a heat storage body;

The heater is laid in the heat storage body, and one side of the heater passes through the wood board layer and the cement layer in turn.

Further, the heat storage body adopts a double-slot honeycomb heat storage body.

Further, the heat storage device is laid in multiple layers.

Further, the heat storage device is connected with a controller outside the boiler.

Further, the driver adopts a high-temperature fan, and the high-temperature fan is connected to the second delivery pipeline outside the furnace body.

Further, there is an insulation layer at the bottom of the boiler, and the bottom shell of the boiler is installed under the insulation layer.

The method for transforming a coal-fired boiler into an electric heating solid heat storage boiler provided by the present invention, after the coal-fired boiler is disassembled, the base is built, and the support device is welded, so that the upper part of the support device and the heat storage device are arranged on the furnace body, so that the furnace body stores heat; the upper part of the support device is arranged at the lower part of the furnace body, and the heat storage device is connected to the upper end surface of the support device, so that the support device The heat storage device is supported, and the heat storage device is arranged at the lower part of the water-cooled wall in the furnace body, so that when the heat storage device is heated, the heat generated can directly heat the water-cooled wall; In the furnace body, an insulation layer is installed on one side of the heat storage device to lock the heat in the furnace; the driver is arranged outside the furnace body, and one end of the driver is connected to the first The other end of the driver is connected to the second delivery pipeline outside the furnace body, so that when the driver is activated, the low-temperature gas in the second delivery pipeline can be driven to the first delivery pipeline. In the pipeline, the first conveying pipeline transfers the heat in the regenerator to the furnace, thereby realizing the heating process of the furnace; the heat storage device includes a heater and a regenerator connected to the outside of the heater, and the heating When the heater is energized, a heating layer is formed, and the heat storage body is arranged outside the heater to form a heat storage layer for storing heat, so that after the heater is energized, heat can be stored in the heat storage layer, When the driver is started, the heat in the heat storage layer is driven upwards to heat the water-cooled wall; finally, the shell of the boiler is installed to complete the transformation process of the electrically heated solid heat storage boiler.

Description of drawings

In order to more clearly illustrate the specific implementation of the present invention or the technical solutions in the prior art, the following will briefly introduce the accompanying drawings that need to be used in the specific implementation or description of the prior art. Obviously, the accompanying drawings in the following description The drawings show some implementations of the present invention, and those skilled in the art can obtain other drawings based on these drawings without any creative work.

Fig. 1 is a flow chart of a method for transforming a coal-fired boiler into an electrically heated solid heat storage boiler provided by an embodiment of the present invention;

Fig. 2 is the front view of the electric heating solid heat storage boiler provided by the embodiment of the present invention;

Fig. 3 is a front sectional view of an electrically heated solid heat storage boiler provided by an embodiment of the present invention;

Fig. 4 is a partial schematic diagram of an electric heating solid heat storage boiler provided by an embodiment of the present invention without a heat storage device;

Fig. 5 is a left view of the electric heating solid heat storage boiler provided by the embodiment of the present invention;

Fig. 6 is a left sectional view of an electrically heated solid heat storage boiler provided by an embodiment of the present invention;

Fig. 7 is a top sectional view of an electrically heated solid heat storage boiler provided by an embodiment of the present invention;

Fig. 8 is a bottom view of an electrically heated solid heat storage boiler provided by an embodiment of the present invention;

Fig. 9 is a top sectional view of a heat storage device installed in an electric heating solid heat storage boiler provided by an embodiment of the present invention;

Fig. 10 is a top view of an electric heating solid heat storage boiler support device provided by an embodiment of the present invention;

Fig. 11 is a front view of an electric heating solid heat storage boiler support device provided by an embodiment of the present invention;

Fig. 12 is a left view of the electric heating solid heat storage boiler support device provided by the embodiment of the present invention;

Fig. 13 is a front view of an electric heating solid heat storage boiler heat storage device provided by an embodiment of the present invention;

Fig. 14 is a left view of the heat storage device of the electric heating solid heat storage boiler provided by the embodiment of the present invention;

Fig. 15 is a bottom view of the heat storage body of the electric heating solid heat storage boiler provided by the embodiment of the present invention.

Icons: 11-furnace body; 12-support device; 13-heat storage device; 14-driver; 15-controller; 111-water wall; 112-first delivery pipeline; 113-second delivery pipeline; 114-support seat 115-reinforcement layer; 116-insulation layer; 117-air outlet; 121-first support frame; - heater; 132 - heat accumulator.

detailed description

The technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Apparently, the described embodiments are some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" etc. The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, or in a specific orientation. construction and operation, therefore, should not be construed as limiting the invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and should not be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that unless otherwise specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection. Connected, or integrally connected; it can be mechanically connected or electrically connected; it can be directly connected or indirectly connected through an intermediary, and it can be the internal communication of two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention in specific situations.

Fig. 1 is a flowchart of a method for transforming a coal-fired boiler into an electrically heated solid heat storage boiler according to an embodiment of the present invention.

As shown in Figure 1, a method for transforming a coal-fired boiler into an electrically heated solid heat storage boiler is carried out according to the following specific operation steps:

(ⅰ) Removal of coal-fired boilers

Remove the front furnace wall, front shell, front arch, chimney, flue gas duct, dust collector, induced draft fan, gray truck, economizer, blower fan, air supply pipe, and left furnace wall of the boiler in sequence , Boiler left shell, ash hopper, ash conveyor, fire grate, boiler base and coal hopper, after disassembly, the remaining rear shell, right shell, left shell, top shell, Furnace wall, water wall, upper drum, lower drum and rear arch;

(ii) Masonry base

After the coal-fired boiler is disassembled, the base of the furnace body 11 is built; the base adopts two refractory cement bases, and the lower part of the coal-fired boiler after the structure is removed is bounded by two edges along the length direction of the coal-fired boiler. Build two refractory cement bases that are parallel and equal to the bottom of the boiler, whose width is 1/6 of the width of the bottom of the boiler, and whose height is 3/4 of the width of the bottom of the boiler. The distance between the two refractory cement bases is 3/3 of the width of the bottom of the boiler. of two;

(iii) Install the supporting device

The support device 12 includes a first support frame 121, a second support frame 122, a third support frame 123, a support net 124 and a fourth support frame 125;

The first support frame 121 is welded on the upper end of the fourth support frame 125, and the second support frame 122 and the third support frame 123 are welded on the lower end of the fourth support frame 125;

During installation, the support net 124 is welded on the upper end surface of the fourth support frame 125, the first support frame 121 is welded on the upper end of the fourth support frame 125, and the second support frame 122 is welded on the The lower end of the fourth support frame 125, and then the third support frame 123 is welded on the lower end surface of the fourth support frame 125;

The specific operation method is as follows: firstly, welding the fourth support frame 125 supporting the regenerator 132, the width of the fourth support frame 125 is the same as the width inside the furnace, and the length is the distance from the end of the original grate to the rear arch. The fourth support frame 125 is welded by the fork-shaped steel materials that are evenly distributed at intervals of two meters and parallel to the ground, and the support net 124 that covers the fork-shaped steel materials is welded on its upper end surface, and the three support nets 124 Steel materials are respectively welded on the outer apex, and its length is the distance from 0.5 meters below the bottom end of the water-cooled wall 111 to the bottom of the fire grate. The apex of the welded steel is placed on the front side and put into the boiler furnace, the first support frame 121 is welded on the upper end surface of the fourth support frame 125, the second support frame 122 is welded on the lower end surface of the fourth support frame 125, Finally, the third support frame 123 is welded on the lower end surface of the fourth support frame 125, the distance from the fourth support frame 125 to the ground is the height of the refractory cement support seat 114, and the tripod includes the second support frame 122 And the third support frame 123, on the length direction of the boiler, each side frame is a vertical support made of load-bearing steel with a distance of two meters and a length equal to the height of the support seat 114 of refractory cement, and a vertical support crossed between the vertices of the two vertical support The diagonal bracing made of fork-shaped steel is welded. In the width direction of the boiler, only the coal hopper side of the original coal-fired boiler has a third support frame 123. The bottom of each vertical support is welded with a steel plate with a length, width and height of 150×150×10mm;

(ⅳ) Install heat storage device

The heat storage device 13 is laid on the support net 124; the heat storage device 13 includes a heater 131 and a heat storage body 132, and a layer of double-slot honeycomb heat storage body is laid on the support net 124, along the The double groove length direction of the heat storage body 132 is laid parallel to the length direction of the support net 124, parallel to the double groove direction of the heat storage body 132, and a heater 131 is inserted in the center of the double groove, and the heater 131 adopts U Type heating wire, the width of the U-type heating wire is half of the width of the double groove, the position of the bifurcation is on the left side, and protrudes from the outside of the heat storage body 132, the right side of the U-type heating wire is separated from the The distance from the right end of the heat storage body 132 is one-third of the length of the single heat storage body 132 in the length direction of the double groove; According to the power requirements of the boiler, lay the second layer of heat storage device layer by layer to the required number of heat storage device layers; after the heat storage body 132 and the heating wire are laid, the unwelded steel Weld the steel material equal to the length on the outer vertices of the other three outer vertices to fix the regenerator 132;

(v) Fixed heat storage device

Install a plank layer on the left side of the heat storage body 132, and build a cement layer on one side of the plank layer, so that the heater 131 passes through the plank layer and the cement layer on the left side of the heat storage body 132 in sequence; The wood layer is made of composite wood, and the cement layer is made of refractory cement. The composite wood board is completely pasted on the heat storage body 132 from the left side of the heat storage body 132, so that the width and height of the composite wood board and the left side of the heat storage body 132 are the same. , refractory cement is built outside the composite wood board, and the left shell of the boiler is installed outside the refractory cement. The upper part of the left shell of the boiler is connected to the top of the boiler and the vertical direction is perpendicular to the ground. The part outside the regenerator 132 penetrates the left side shell of the boiler, and then the electric heating wire is connected with the electric control cabinet outside the furnace body 11;

(ⅵ) Install insulation layer

Lay the insulation layer 116 on one side of the furnace body 11; paste the rock wool on the regenerator 132 from the front side of the boiler completely, wherein the width and height of the rock wool and the regenerator 132 on the front side of the boiler are the same, and the rock wool Exterior masonry covering the entire front side with refractory cement;

(ⅶ) Install the furnace shell

Install the left side shell of the furnace body on the outside of the cement layer, make the heater 131 pass through the left side shell, install the front side shell and the right side shell of the furnace body; install the front side of the boiler outside the refractory cement Shell, the front shell of the boiler is connected to the left shell of the boiler and the top of the boiler, and the vertical direction is perpendicular to the ground. The right coal hopper is removed and the right shell of the boiler is installed. The shell on the right side of the boiler is flush with the vertical direction;

(ⅷ) Install the driver

The driver 14 is installed on one side of the furnace body 11, the air inlet is connected to the upper drum, the first delivery pipe 112 is provided with an air outlet 117, and the air outlet 117 is connected to the lower part of the heat storage body 132; The driver adopts a high-temperature fan, and the high-temperature fan is arranged on the left side of the boiler, so that the air inlet is connected to the upper drum, and the size of the air inlet is the same as that of the upper drum. The air supply ports 117 of the same size, the air supply ports 117 are all connected to the bottom of the heat storage body 132, the width of each air supply port 117 is 1/2 of the width of the bottom of the boiler, and the length is the length of the heat storage body 132 One-sixth of that, the distance between multiple air supply ports 117 is the same as its length, in the width direction of the boiler, the air supply port 117 is located at the center, in the boiler length direction, the distance between the air supply ports 117 at both ends and the two ends of the heat storage body 132 Both are one-twelfth of the length of the heat accumulator 132;

(ⅸ) back cover

Install the bottom shell of the boiler; at the bottom of the boiler where the tuyere is removed, it is close to the rock wool for insulation, and the bottom shell of the boiler is installed under the rock wool, so that the bottom shell of the boiler is compatible with the left shell of the boiler and the right side of the boiler The casings are connected and parallel to the ground.

The invention provides a method for transforming a coal-fired boiler into an electric heating solid heat storage boiler. Firstly, the coal-fired boiler is disassembled, and water-cooled walls are distributed around the furnace in the furnace body, and the water-cooled walls can absorb the high temperature in the furnace. The radiant heat of the gas generates steam or hot water in the tube of the water-cooled wall, which reduces the temperature of the furnace wall and protects the furnace wall; at the same time, a large amount of liquid water and water vapor in the water-cooled wall have heat storage capacity, which is strong and can reduce the heat storage capacity. The amount of usage; the water wall absorbs the radiant heat of the solid regenerator at high temperature in the furnace, and the heat transfer effect is better; the regenerator adopts a double-slot honeycomb regenerator, which is more conducive to heat dissipation; The electric heating wire is heated externally to achieve automatic operation, while ensuring the stability of heating, using high-temperature fans to form circulating air, avoiding the problem of excessive exhaust gas temperature, good heat dissipation, and higher boiler power, making fuel resources It is more economical and reasonable to use; after the heating wire is started, it will not produce harmful gases such as smoke, sulfur and nitrogen oxides, and will not cause harm to humans and the environment. The invention has the advantages of simple management mode, good heat transfer effect, large heat storage, low boiler cost, good safety and wide application range, especially suitable for areas with rich wind energy resources, and solves the problem of a large number of coal-fired boilers being idle. The invention omits a series of transportation and treatment processes such as coal transportation, combustion, and slag removal in the prior art, avoids the problem of coal fuel combustion heat loss, and effectively improves the overall working efficiency of the boiler.

Fig. 2 is the front view of the electric heating solid heat storage boiler provided by the embodiment of the present invention; Fig. 3 is the front sectional view of the electric heating solid heat storage boiler provided by the embodiment of the present invention; Fig. 4 is the electric heating solid heat storage boiler provided by the embodiment of the present invention A partial schematic diagram of a solid heat storage boiler without a heat storage device; Figure 5 is a left view of an electrically heated solid heat storage boiler provided by an embodiment of the present invention; Figure 6 is a left view of an electrically heated solid heat storage boiler provided by an embodiment of the present invention Sectional view; Figure 7 is a top sectional view of the electric heating solid heat storage boiler provided by the embodiment of the present invention; Figure 8 is a bottom view of the electric heating solid heat storage boiler provided by the embodiment of the present invention; Figure 9 is the electric heating solid heat storage boiler provided by the embodiment of the present invention Figure 10 is a top view of the support device for the electric heating solid heat storage boiler provided by the embodiment of the present invention; Figure 11 is the support device for the electric heating solid heat storage boiler provided by the embodiment of the present invention Figure 12 is a left view of the support device for an electric heating solid heat storage boiler provided by an embodiment of the present invention; Figure 13 is a front view of a heat storage device for an electric heating solid heat storage boiler provided by an embodiment of the present invention; Figure 14 is The left view of the heat storage device of the electric heating solid heat storage boiler provided by the embodiment of the present invention; Fig. 15 is the bottom view of the heat storage body of the electric heating solid heat storage boiler provided by the embodiment of the present invention.

As shown in Figures 2 to 15, the electric heating solid heat storage boiler transformed from a coal-fired boiler includes a furnace body 11, a support device 12, a heat storage device 13 and a driver 14;

The upper part of the support device 12 is arranged in the furnace body 11, the heat storage device 13 is connected with the support device 12, and is arranged at one end of the water-cooled wall 111 in the furnace body 11; the driver 14 One end of the driver 14 is connected with the first conveying pipeline 112 outside the furnace body 11, and the other end of the driver 14 is connected with the second conveying pipeline 113 outside the furnace body 11;

The heat storage device 13 includes a heater 131 and a heat storage body 132, the heater 131 forms a heating layer, the heat storage body 132 forms a heat storage layer, and the heater 131 is connected in the heat storage body 132 , so that the heating layer is arranged in the heat storage layer.

As shown in Figure 2, the furnace body 11 includes a front shell, a rear shell, a left shell, a right shell and a top shell; the furnace in the furnace body 11 is surrounded by water-cooled walls 111 The upper part of the support device 12 is welded at the lower position in the body of furnace 11, and the length and width of the support device 12 are respectively the same as the length and width of the hearth in the body of furnace 11; the heat storage device 13 connected to the upper end surface of the support device 12, so that the support device 12 supports the heat storage device 13, and the heat storage device 13 is installed at the lower position of the water-cooled wall 111 in the furnace body 11, After the heat energy in the heat storage device 13 is released, the water in the water-cooled wall 111 is heated for heating or bathing; the heat storage device 13 adopts a combination of a heater 131 and a heat storage body 132, The heat storage body 132 is a double-slot honeycomb heat storage body, and the length direction of the double grooves is the same as the length direction of the furnace body 11. The heater 131 adopts a heating wire, and the heating wire is U-shaped When the heating wire is arranged, the U-shaped heating wire is arranged in parallel in the center of the double groove of the heat storage body 132 along the direction of the double groove. The width of the U-shaped heating wire is half of the width of the double groove, and the bifurcation The position is set on the left side of the furnace body 11 and extends out of the heat storage body 132. The distance between the right side of the U-shaped heating wire and the right end of the heat storage body is the length of a single heat storage body in the length direction of the double groove One-third of the heat storage body 132 of the first layer, after laying the heating wire on the top of the first layer of heat storage body 132 according to the above method, and then laying the second layer of heat storage body 132 according to the same method, in the double groove of the second layer of heat storage body 132 Insert the heating wire according to the above method, and then repeat the above laying process again. According to the requirements of the boiler power, the heating wire and the heat storage body 132 are laid to the required number of layers. After the heating wire is energized, the The thermal storage body 132 is heated so that the thermal storage layer stores heat energy, and the thermal energy of the thermal storage body 132 directly heats the water-cooled wall 111; the heater 131 can also adopt other shapes, and can also adopt other heating methods Tools can use heating rods, etc.; the regenerator 132 can be a ceramic honeycomb regenerator, or other materials with heat storage functions, such as carbon steel or heat-resistant and corrosion-resistant steel; the furnace A first delivery pipe 112 arranged horizontally is arranged outside the body 11, a second delivery pipe 113 arranged vertically is arranged outside the furnace body 11, and the driver 14 is connected between the first delivery pipe 112 and the second delivery pipe 113. Between the delivery pipes 113, so that when the driver 14 is activated, the low-temperature gas in the second delivery pipe 113 can be driven into the first delivery pipe 112, and the heat in the regenerator 132 can be delivered to the furnace. The water wall 111 is heated inside the body 11 . The driver 14 adopts a high-temperature fan, and the high-temperature fan is used to form a circulating air to improve the heat exchange effect. After the heat exchange, the low-temperature hot air is sent back to the regenerator by the high-temperature fan to form a cycle, and the heated water is used for heating or bathing; the high-temperature fan is arranged on the left side of the furnace body 11. The air inlet is connected from the upper drum, and there are evenly distributed multiple air outlets 117 of the same size on the first conveying pipe 112, all of which are connected to the lower part of the heat storage body 132, and the width of each air outlet 117 is half of the width of the bottom of the boiler One, the length is one-sixth of the length of the heat storage body 132, and the distance between the plurality of air supply ports 117 is the same as the length of the heat storage body 132.

Further, the support device 12 includes a first support frame 121, a second support frame 122, a third support frame 123 and a support net 124;

The first support frame 121 and the second support frame 122 are respectively connected to opposite sides of the support net 124, the heat storage device 13 is connected to one side of the support net 124, and is arranged on the first support net 124. In the support frame 121, the third support frame 123 is connected to the opposite side of the support net 124;

The third supporting frame 123 includes a first connecting piece and a second connecting piece, and the first connecting piece and the second connecting piece are cross-connected to form a fork.

The first support frame 121 is made of cylindrical or flat steel, and is welded on the support net 124. The second support frame 122 is made of load-bearing steel, and the load-bearing steel is cylindrical or flat, and Welded under the support net 124, the third support frame 123 adopts the cross-connected first steel material and the second steel material, and the first steel material and the second steel material adopt a cylindrical or flat shape, so that the first steel material and the second steel material The second steel materials intersect to form a fork-shaped steel frame, and there are a plurality of fork-shaped steel frames, and the plurality of fork-shaped steel frames are connected by vertically arranged supporting steel materials to form a fork-shaped frame. The lower end of the supporting steel is welded with a steel plate to fix the bottom position of the supporting steel. The length, width and thickness of the steel plate are divided into 150mm, 150mm, and 10mm; the heat storage device 13 is laid on the supporting net 124 above, the heat storage device 13 is arranged in the first support frame 121 , and steel materials are welded on the outside of the support net 124 to fix the heat storage device 13 .

Further, the support device 12 also includes a fourth support frame 125;

The fourth support frame 125 is connected to one end of the second support frame 122 , and the support net 124 is connected to the fourth support frame 125 .

The fourth support frame 125 is a bottom support made of steel, the steel is cylindrical or flat, and the bottom support is welded to the upper ends of the second support frame 122 and the third support frame 123. The net 124 is welded on the upper surface of the fourth supporting frame 125 , so that the fourth supporting frame 125 supports and fixes the supporting net 124 .

Further, the heater 131 is a multi-layer heating layer, the heat storage body 132 is a multi-layer heat storage layer, and the multi-layer heating layers are respectively arranged in the multi-layer heat storage layers.

The heater 131 is laid in the heat storage body 132, and a layer of heating layer is formed after the laying is completed. The heater 131 and the heat storage body 132 can be laid in multiple layers according to the needs of boiler power use, so as to meet the needs of the furnace body 11. internal heat demand.

Further, the furnace body 11 is provided with a support seat 114;

The support bases 114 are disposed at both ends of the furnace body 11 .

The support base 114 is used to support the furnace body 11, and the support base 114 adopts a refractory cement base. The refractory cement base has good refractoriness, high constant temperature and pressure resistance, good thermal stability, and simple production process; The refractory cement base can be set to two, respectively arranged at the two opposite ends of the furnace body 11, and can also be set to more according to the needs of actual use; the length of the refractory cement base and the length of the furnace body 11 Same, the width is 1/6 of the width of the bottom of the furnace body 11, the height is 3/4 of the width of the bottom of the furnace body 11, and the distance between the two refractory cement bases is 2/3 of the width of the bottom of the furnace body 11 ; The two refractory cement bases are respectively arranged on the outside of the lower part of the supporting device 12 .

Further, it also includes a controller 15;

The inner wall of the furnace body 11 is provided with a reinforcement layer 115 , and one end of the heater 131 of the heat storage device 13 passes through the reinforcement layer 115 and is connected to the controller 15 .

The inner wall of the furnace body 11 is provided with a reinforcement layer 115, so that the parts in the furnace body 11 are connected more firmly; the controller 15 adopts an electric control cabinet, and the electric control cabinet is arranged on the furnace body. body 11; the left end of the heating wire extends out of the left end of the heat storage device 13, penetrates the reinforcement layer 115, and then penetrates the left shell of the furnace body 11, so that the heat storage The left side of the device 13 is completely attached to the inner surface of the reinforcement layer 115, and the left end of the heating wire is connected to the electric control cabinet outside the furnace body 11, so that the electric control cabinet is on the inside of the furnace body 11. Externally controls the opening and closing of the heating wire.

Further, the inner wall of the furnace body 11 is provided with an insulation layer 116 , and the insulation layer 116 is arranged on the side of the heat storage body 132 .

The thermal insulation layer 116 can use rock wool, which has light weight, good fire resistance, small thermal conductivity, good thermal insulation effect, heat absorption and noise reduction, high hydrophobicity, good moisture resistance, non-corrosiveness, safety and environmental protection; the insulation layer 116 can also be made of other aluminum silicate boards or glass wool with high temperature resistance and insulation effects; the rock wool is completely attached to the furnace body 11 along the front side. On the thermal storage body 132 , the width and height of the rock wool and the thermal storage body 132 are the same. The bottom position of the furnace body 11 is close to the rock wool and rock wool is also used as the insulation layer 116, and then the bottom shell of the furnace body 11 is respectively connected with the left shell and the right shell and installed.

Further, the first delivery pipe 112 outside the furnace body 11 is provided with a plurality of air supply ports 117 , and the plurality of air supply ports 117 are respectively arranged at the lower part of the heat storage device 13 .

A plurality of air supply ports 117 are uniformly arranged on the first conveying pipe 112, and are arranged at the lower part of the heat storage body 132; the sizes of the plurality of air supply ports 117 can be the same or different; the The width of the air supply port 117 is 1/2 of the bottom width of the body of furnace 11, and the length is 1/6 of the length of the regenerator 132, and the distance between the plurality of air supply ports 117 is the same as the length of the air supply port 117; The air outlet 117 is arranged in the middle of the first conveying pipe 112 .

Further, the reinforcement layer 115 includes a wood plank layer and a cement layer arranged sequentially from the inside to the outside;

The wood board layer is connected to the cement layer, and the wood board layer is connected to one side of the heat storage device 13 .

The reinforcement layer 115 includes a wood layer and a cement layer arranged sequentially from the inside and the outside, the wood layer is made of composite wood, the cement layer is made of refractory cement, and the composite wood is completely pasted on the left side of the furnace body 11. On the regenerator 132, the width and height of the composite wood board are the same as the width and height of the left side of the regenerator 132; refractory cement is built on the outside of the composite wood board, and the boiler is installed on the outside of the refractory cement. The left shell, the left shell of the boiler is vertically connected to the top of the boiler, and the left shell of the boiler is perpendicular to the ground; the left end of the U-shaped heating wire penetrates the composite wood board and penetrates the fire-resistant The cement, after penetrating the left shell of the boiler, is connected with the electric control cabinet outside the furnace body 11 .

In one embodiment of the present invention, during the valley power period at night, the electric control cabinet is started, and the heating wire is energized, and the heating layer formed by the heating wire starts to heat, and the heat storage layer formed by the heat storage body 132 is used for the heat generated by the heating layer. For storage, the heat temperature can reach above 750°C; when heat is needed, the high-temperature fan is started, and the high-temperature fan drives low-temperature air to flow through the heat storage body 132 to form high-temperature air, and then the high-temperature air blows the water in the water-cooled wall 111 After heating, the low-temperature hot air is sucked downward by the high-temperature fan along the second delivery pipe 113, and sent back to the regenerator along the first delivery pipe 112 to form a cycle, and the heated water in the water-cooled wall 111 is It is used for heating or bathing; in order to effectively use energy, the electric heating wire is usually heated at night, and in order to fully circulate the heat, the high-temperature fan works continuously.

The present invention is in the course of work, and the harmful substance that produces compares with prior art, sees as shown in the table below:

It can be seen from the above table that compared with the boilers of the prior art, the use of electric heating solid heat storage boilers will not produce late-stage pollution during use, save the cost of pollutant treatment, and make the management of the entire boiler more efficient. convenience.

An electric heating solid heat storage system with an electric heating solid heat storage boiler, comprising a machine body and a plurality of electric heating solid heat storage boilers;

A plurality of installation seats are arranged in the body, and a plurality of the electric heating solid heat storage boilers are respectively installed in the installation seats, and the plurality of electric heating solid heat storage boilers are connected by conveying pipes.

In the electric heating solid heat storage system, a plurality of electric heating solid heat storage boilers are respectively installed in the body, so that the start switch in the body controls the opening and closing of multiple electric heating solid heat storage boilers at the same time, which is convenient The start-up of the boiler is managed; multiple electric heating solid heat storage boilers are also connected through transmission pipelines to maximize energy utilization and further improve the thermal efficiency of the boiler.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than limiting them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: It is still possible to modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the technical solutions of the various embodiments of the present invention. scope.

Claims (10)

1. A method for transforming a coal-fired boiler into an electrically heated solid heat storage boiler, characterized in that it comprises the following steps successively: (ⅰ) Removal of coal-fired boilers Remove the front furnace wall, front shell, front arch, chimney, flue gas duct, dust collector, induced draft fan, gray truck, economizer, blower fan, air supply pipe, and left furnace wall of the boiler in sequence , Boiler left shell, ash hopper, ash conveyor, fire grate, boiler base and coal hopper, after disassembly, the remaining rear shell, right shell, left shell, top shell, Furnace wall, water wall, upper drum, lower drum and rear arch; (ii) Masonry base After dismantling the coal-fired boiler, build the base of the furnace body (11); (iii) Install the supporting device The support device (12) comprises a first support frame (121), a second support frame (122), a third support frame (123) and a support net (124); The first support frame (121) is welded on the upper end of the support net (124), and the second support frame (122) and the third support frame (123) are welded on the upper end of the support net (124). lower end; (ⅳ) Install heat storage device Laying the heat storage device (13) on the support net (124); (v) Fixed heat storage device Install a plank layer on one side of the heat storage device (13), build a cement layer on one side of the plank layer, and make one side of the heat storage device (13) pass through the plank layer and cement successively Floor; (ⅵ) Install insulation layer Laying insulation layer (116) on one side of body of heater (11); (ⅶ) Install the furnace shell Install the left side shell of the furnace body (11) on the outside of the cement layer, make the heat storage device (13) pass through the left side shell, and install the furnace body front side shell and the right side shell; (ⅷ) Install the driver The driver (14) is installed on one side of the body of heater (11), and the driver (14) is connected with the first conveying pipeline (112) outside the body of heater (11); (ⅸ) back cover Install the bottom shell of the boiler. 2. The method for transforming a coal-fired boiler into an electric heating solid heat storage boiler according to claim 1, wherein the base adopts two refractory cement bases, and the two refractory cement bases are respectively built on the bottom of the boiler. bottom. 3. The method for transforming a coal-fired boiler into an electrically heated solid heat storage boiler according to claim 1, characterized in that, the support device (12) further includes a fourth support frame (125); The fourth support frame (125) is welded on the upper end of the third support frame (123), and the support net (124) is welded on the fourth support frame (125). 4. The method for transforming a coal-fired boiler into an electric heating solid heat storage boiler according to claim 1, characterized in that, the first conveying pipe (112) of the boiler is provided with an air supply port (117), and the The tuyere (117) is connected to the lower part of the heat storage device (13). 5. The method for transforming a coal-fired boiler into an electrically heated solid heat storage boiler according to claim 1, wherein the heat storage device (13) includes a heater (131) and a heat storage body (132); The heater (131) is laid in the heat storage body (132), and one side of the heater (131) passes through the wood board layer and the cement layer in sequence. 6. The method for transforming a coal-fired boiler into an electrically heated solid heat storage boiler according to claim 5, characterized in that the heat storage body (132) adopts a double-slot honeycomb heat storage body. 7. The method for transforming a coal-fired boiler into an electrically heated solid heat storage boiler according to claim 1, characterized in that the heat storage device (13) is laid in multiple layers. 8. The method for transforming a coal-fired boiler into an electrically heated solid heat storage boiler according to claim 1, characterized in that the heat storage device (13) is connected to a controller outside the boiler. 9. The method for transforming a coal-fired boiler into an electrically heated solid heat storage boiler according to claim 1, characterized in that the driver (14) adopts a high-temperature blower, and the high-temperature blower is connected to the second delivery pipeline outside the boiler ( 113). 10. The method for transforming a coal-fired boiler into an electrically heated solid heat storage boiler according to claim 1, characterized in that, the bottom of the boiler has an insulating layer (116), and the bottom of the insulating layer (116) is equipped with a boiler bottom shell.