CN217154219U - A waste heat recovery device for coal production and electricity - Google Patents

Abstract

The utility model discloses a coal production waste heat recovery device for electricity, including burning boiler, booster water pump, discharge fume the chimney, cinder bin and heat recovery mechanism, burning boiler's exhanst gas outlet is linked together through the flue gas side entry of flue gas conveyer pipe with heat recovery mechanism, be provided with flue gas filter component in the flue gas conveyer pipe, heat recovery mechanism's flue gas side outlet is linked together through the entry of suction machine with discharge fume the chimney, burning boiler's row cinder notch is linked together through the entry of cinder discharge tube with the cinder bin, cinder bin's exhanst gas outlet is linked together through cinder hot gas conveyer pipe and flue gas conveyer pipe, booster water pump is linked together with heat recovery mechanism's water side entry, the device's waste heat recovery efficiency and heat exchange efficiency are higher.

Description

A waste heat recovery device for coal production and electricity

technical field

The utility model belongs to the technical field of thermal power generation, and relates to a waste heat recovery device for coal production electricity.

Background technique

my country is the world's largest coal producer and coal consumer. Coal is my country's main primary energy source and an important pillar of the national economy. Coal power generation is the most common type of thermal power generation. When burning, heat water to generate steam, convert the chemical energy of the fuel into thermal energy, the steam pressure drives the steam turbine to rotate, and the thermal energy is converted into mechanical energy, and then the steam turbine drives the generator to rotate, converting the mechanical energy into electrical energy. In the process of coal power generation, in order to improve the energy utilization rate , the existing power plants are designed with waste heat recovery devices to recover the waste heat generated in the power generation process.

However, the existing waste heat recovery device has the following shortcomings;

The existing waste heat recovery device can only recover in a single way, that is, it cannot recover the waste heat of the flue gas and the waste heat of the coal slag at the same time in the process of coal power generation, and the waste heat recovery efficiency is low and the effect is poor.

The existing waste heat recovery device fails to effectively filter the soot and other impurities generated in the high temperature flue gas during the process of transporting the high temperature flue gas to the outside for heat exchange. The ash layer affects the outward heat transfer of the flue gas, and also affects the fluidity of the high-temperature flue gas, which greatly reduces the heat exchange efficiency.

Utility model content

The purpose of the utility model is to overcome the shortcomings of the above-mentioned prior art, and to provide a waste heat recovery device for coal production and electricity, which has high waste heat recovery efficiency and heat exchange efficiency.

In order to achieve the above purpose, the waste heat recovery device for coal production electricity according to the present invention includes a combustion boiler, a booster water pump, a chimney, a cinder storage box and a heat recovery mechanism. The flue gas side inlet of the recovery mechanism is connected, the flue gas conveying pipe is provided with a flue gas filter assembly, the flue gas side outlet of the heat recovery mechanism is connected to the inlet of the chimney through the suction machine, and the slag discharge port of the combustion boiler is connected with the coal slag outlet. The discharge pipe is connected with the inlet of the cinder storage box, the flue gas outlet of the cinder storage box is connected with the flue gas conveying pipe through the cinder hot gas conveying pipe, and the booster water pump is connected with the water side inlet of the heat recovery mechanism.

A slag discharge door is arranged on the side of the cinder storage box.

The heat recovery mechanism includes a heat preservation cylinder, and a heat exchange coil is arranged in the heat preservation cylinder, the upper end of the heat exchange coil is communicated with the flue gas conveying pipe, and the lower end of the heat exchange coil is communicated with the suction machine;

A water inlet flange is arranged at the bottom water inlet on one side of the thermal insulation cylinder, the water inlet is communicated with the booster pump through the water inlet flange, and a water outlet flange is arranged at the top water outlet on the other side of the thermal insulation cylinder.

A first control valve is installed on the water outlet flange.

The flue gas outlet of the cinder storage box is communicated with the flue gas conveying pipe through the cinder hot gas conveying pipe and the second control valve.

The flue gas filter assembly includes a filter tube, the filter tube is provided with a filter screen cartridge, the upper port of the filter screen cartridge is in contact with a retaining ring arranged on the inner wall of the filter tube, and the bottom end of the filter screen cartridge is provided with a threaded ring, the threaded ring It is threadedly connected with the inner thread arranged on the inner wall of the filter tube, and the bottom end of the threaded ring is provided with an end cover;

The two ends of the filter tube are respectively provided with an air inlet and an air outlet.

The outside of the flue gas conveying pipe and the cinder hot gas conveying pipe is covered with a rubber-plastic thermal insulation sleeve.

The water side inlet of the heat recovery mechanism is connected with an external domestic water pipe.

The utility model has the following beneficial effects:

During the specific operation of the waste heat recovery device for coal production electricity according to the utility model, the high-temperature flue gas is filtered by the flue gas filter component and then sent to the heat recovery mechanism for heat exchange, and the cinder produced by the combustion first passes through the cinder discharge pipe. It is sent to the cinder storage box, and then the hot gas generated by the cinder is transported to the heat recovery mechanism through the cinder hot gas conveying pipe, so as to realize the simultaneous recovery of the waste heat of the coal power generation flue gas and the waste heat of the cinder, so as to heat the domestic water supply and greatly improve the waste heat. Recycling efficiency and reducing energy waste. In addition, by arranging the flue gas filter assembly, the dust in the flue gas is effectively prevented from accumulating in the heat recovery mechanism, causing the inner wall of the pipe to stick, thereby effectively improving the heat recovery efficiency.

Description of drawings

Figure 1 is a schematic structural diagram of the utility model.

FIG. 2 is a schematic structural diagram of the smoke filter assembly 9 .

FIG. 3 is a schematic structural diagram of the heat recovery mechanism 3 .

Among them, 1 is the combustion boiler, 2 is the cinder storage box, 3 is the heat recovery mechanism, 301 is the thermal insulation cylinder, 302 is the heat exchange coil, 303 is the water inlet flange, 304 is the water outlet flange, and 305 is the first control Valve, 4 is the exhaust chimney, 5 is the cinder discharge pipe, 6 is the flue gas conveying pipe, 7 is the cinder hot gas conveying pipe, 8 is the second control valve, 9 is the flue gas filter assembly, 901 is the filter pipe, and 902 is the filter. Mesh cylinder, 903 is retaining ring, 904 is threaded ring, 905 is end cap, 906 is air inlet, 907 is air outlet, 10 is suction, 11 is booster pump, 12 is slag discharge door, 13 is rubber and plastic Insulation jacket.

Detailed ways

In order to enable those skilled in the art to better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described The embodiments are only a part of the embodiments of the present invention, not all of the embodiments, and are not intended to limit the scope of the disclosure of the present invention. Also, in the following description, descriptions of well-known structures and techniques are omitted to avoid unnecessarily obscuring the concepts disclosed in the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

The accompanying drawings show a schematic structural diagram of an embodiment according to the disclosure of the present invention. The figures are not to scale, some details have been exaggerated for clarity, and some details may have been omitted. The shapes of various regions and layers shown in the figures and their relative sizes and positional relationships are only exemplary, and in practice, there may be deviations due to manufacturing tolerances or technical limitations, and those skilled in the art should Regions/layers with different shapes, sizes, relative positions can be additionally designed as desired.

Referring to Figure 1, Figure 2 and Figure 3, the waste heat recovery device for coal production electricity according to the present utility model includes a combustion boiler 1, a cinder storage box 2 and a heat recovery mechanism 3, and the flue gas outlet of the combustion boiler 1 passes through a flue gas conveying pipe. 6 is communicated with the flue gas side inlet of the heat recovery mechanism 3, the flue gas conveying pipe 6 is provided with a flue gas filter assembly 9, and the flue gas side outlet of the heat recovery mechanism 3 is communicated with the inlet of the chimney 4 through the suction machine 10 , the slag discharge port of the combustion boiler 1 is communicated with the inlet of the cinder storage box 2 through the cinder discharge pipe 5, and the flue gas outlet of the cinder storage box 2 is connected with the flue gas transmission pipe 6 through the cinder hot gas conveying pipe 7 and the second control valve 8 The side of the cinder storage box 2 is provided with a slag discharge door 12, and the booster pump 11 is communicated with the water side inlet of the heat recovery mechanism 3. Through the second control valve 8, it is convenient for personnel to control the size of the cinder hot gas delivery opening according to the amount of cinder. .

The heat recovery mechanism 3 includes a heat preservation cylinder 301, and a heat exchange coil 302 is arranged in the heat preservation cylinder 301. The upper end of the heat exchange coil 302 is communicated with the flue gas conveying pipe 6, and the lower end of the heat exchange coil 302 is connected with the suction machine. 10 connected.

A water inlet flange 303 is provided at the bottom water inlet on one side of the thermal insulation cylinder 301, and the water inlet communicates with the booster pump 11 through the water inlet flange 303, and the top water outlet on the other side of the thermal insulation cylinder 301 is provided There is a water outlet flange 304, and a first control valve 305 is installed on the water outlet flange 304. The first control valve 305 can facilitate personnel to control the discharge amount of hot water according to actual needs.

The flue gas filter assembly 9 includes a filter tube 901, and a filter tube 902 is arranged inside the filter tube 901. The upper port of the filter tube 902 is in contact with a retaining ring 903 arranged on the inner wall of the filter tube 901, and the bottom of the filter tube 902 is in contact with each other. The end is provided with a threaded ring 904, the threaded ring 904 is threadedly connected with the inner thread provided on the inner wall of the filter tube 901, and an end cap 905 is installed at the bottom end of the threaded ring 904;

Two ends of the filter tube 901 are respectively provided with an air inlet 906 and an air outlet 907 .

The setting of the slag discharge door 12 is convenient for personnel to clean the cinder which has been recovered by heat. The outside of the flue gas conveying pipe 6 and the cinder hot gas conveying pipe 7 are covered with a rubber-plastic insulation sleeve 13, which can improve the transmission of flue gas. The thermal insulation effect of the pipe 6 and the slag hot gas conveying pipe 7 reduces heat loss.

The working process of the utility model is:

When in use, the suction machine 10 is turned on, and the high-temperature flue gas generated by coal combustion enters the flue gas conveying pipe 6 under the suction of the suction machine 10, and the cinder dropped from the slag discharge port of the combustion boiler 1 is discharged through the cinder. The pipe 5 is introduced into the cinder storage box 2, and then the cinder hot gas enters the flue gas conveying pipe 6 through the cinder hot gas conveying pipe 7 to form a mixed gas with the high-temperature flue gas. The filter screen cylinder 902 enters into the heat recovery mechanism 3 after being filtered. At this time, the booster pump 11 pumps the outside normal temperature water into the insulation cylinder 301, and the water body gradually rises from the bottom to the top. The high temperature gas completes the heat exchange, and then the gas is discharged from the bottom end of the heat exchange coil 302, and then enters the exhaust chimney 4 through the suction machine 10 to be discharged, and the hot water generated by the heat exchange is discharged through the water outlet flange 304 of the thermal insulation cylinder 301. In the external domestic water pipeline, hot water supply is provided for the surrounding residents, so that the purpose of heat recovery can be achieved.

Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, it is still possible to modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Within the spirit and principle of the present utility model, any modifications, equivalent replacements, improvements, etc. made shall be included within the protection scope of the present utility model.

Claims (8)

1. A waste heat recovery device for coal production electricity, characterized in that it comprises a combustion boiler (1), a booster water pump (11), a chimney (4), a cinder storage box (2) and a heat recovery mechanism (3), The flue gas outlet of the combustion boiler (1) is communicated with the flue gas side inlet of the heat recovery mechanism (3) through the flue gas conveying pipe (6), and the flue gas conveying pipe (6) is provided with a flue gas filter assembly (9), The flue gas side outlet of the heat recovery mechanism (3) is communicated with the inlet of the chimney (4) through the suction machine (10), and the slag discharge port of the combustion boiler (1) is connected to the cinder storage box through the cinder discharge pipe (5). The inlet of (2) is connected, the flue gas outlet of the cinder storage box (2) is connected with the flue gas conveying pipe (6) through the cinder hot gas conveying pipe (7), and the booster water pump (11) is connected with the heat recovery mechanism (3) connected to the water side inlet. 2 . The waste heat recovery device for coal production and electricity according to claim 1 , wherein a slag discharge door ( 12 ) is provided on the side of the cinder storage box ( 2 ). 3 . 3. The waste heat recovery device for coal production and electricity according to claim 1, wherein the heat recovery mechanism (3) comprises a thermal insulation cylinder (301), and a heat exchange coil (302) is arranged in the thermal insulation cylinder (301). ), the upper end of the heat exchange coil (302) is communicated with the flue gas conveying pipe (6), and the lower end of the heat exchange coil (302) is communicated with the suction machine (10); A water inlet flange (303) is provided at the bottom water inlet on one side of the thermal insulation cylinder (301), and the water inlet is communicated with the booster pump (11) through the water inlet flange (303), and the thermal insulation cylinder (301) ) A water outlet flange (304) is arranged at the top water outlet on the other side. 4. The waste heat recovery device for coal production and electricity according to claim 3, wherein a first control valve (305) is installed on the water outlet flange (304). 5. The waste heat recovery device for coal production electricity according to claim 4, wherein the flue gas outlet of the cinder storage box (2) is connected to the flue gas through the cinder hot gas conveying pipe (7) and the second control valve (8). The conveying pipe (6) is communicated. 6. The waste heat recovery device for coal production and electricity according to claim 1, wherein the flue gas filter assembly (9) comprises a filter tube (901), and a filter screen cylinder (902) is provided inside the filter tube (901). , the upper port of the filter cylinder (902) is in contact with the retaining ring (903) arranged on the inner wall of the filter tube (901), the bottom end of the filter cylinder (902) is provided with a threaded ring (904), and the threaded ring (904) ) is threadedly connected with an internal thread provided on the inner wall of the filter tube (901), and an end cover (905) is installed at the bottom end of the threaded ring (904); The two ends of the filter tube (901) are respectively provided with an air inlet (906) and an air outlet (907). 7 . The waste heat recovery device for coal production and electricity according to claim 1 , wherein the outside of the flue gas conveying pipe ( 6 ) and the coal slag hot gas conveying pipe ( 7 ) are covered with rubber-plastic thermal insulation sleeves ( 13 ). 8 . 8 . The waste heat recovery device for coal production and electricity according to claim 1 , wherein the water side inlet of the heat recovery mechanism ( 3 ) is connected with an external domestic water pipeline. 9 .

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