CN218914987U

CN218914987U - Anti-freezing thawing device for coal yard

Info

Publication number: CN218914987U
Application number: CN202320087430.6U
Authority: CN
Inventors: 赵瑞娥; 尹志红; 郑良栋; 熊成; 刘平; 宋丹
Original assignee: China Power Engineering Consultant Group Central Southern China Electric Power Design Institute Corp
Current assignee: China Power Engineering Consultant Group Central Southern China Electric Power Design Institute Corp
Priority date: 2023-01-30
Filing date: 2023-01-30
Publication date: 2023-04-25
Anticipated expiration: 2033-01-30

Abstract

The utility model discloses an antifreezing and thawing device for a coal yard, which is characterized in that a plurality of roller slag cooling machines (1) are connected in parallel, air outlets of the roller slag cooling machines (1) are connected with a hot air pipe assembly (2), a plurality of heat exchange pipe assemblies (3) are connected in parallel, an air inlet at one end of each heat exchange pipe assembly (3) is connected with the hot air pipe assembly (2), an air outlet at the other end of each heat exchange pipe assembly is communicated with an exhaust pipe assembly (4), the tail end of each exhaust pipe assembly (4) is communicated with a flue inlet of a boiler dust remover, one end of each communicating pipe assembly (5) is communicated with the hot air pipe assembly (2), and the other end of each communicating pipe assembly is communicated with the exhaust pipe assembly (4). The utility model overcomes the defect that the prior art cannot prevent the coal from freezing, has the advantages of energy saving, coal freezing prevention, rapid thawing after the occurrence of freezing, optional heating area, no dead angle, program operation realization, low investment, low operation cost and the like.

Description

Anti-freezing thawing device for coal yard

Technical Field

The utility model relates to the technical field of storage of coal yards, in particular to an antifreezing and thawing device for a coal yard.

Background

The fire coal required by a thermal power plant, a chemical plant or a metallurgical enterprise is usually stored in a coal storage yard. In northern areas, the winter is cold, and when the water content of the fire coal exceeds 10%, the fire coal is at risk of freezing. Once the fire coal is frozen into a large block, the material taking equipment can not normally provide fuel or raw materials for subsequent equipment, and the stability of a whole factory process system is directly affected. The prior art can not prevent the coal from freezing, and only can crush and loosen the coal pile by utilizing a coal pusher or other mechanical equipment after the coal freezing occurs, so that the efficiency is low and the energy consumption is high. In order to prevent the fire coal from freezing and quickly defrost after the occurrence of the freezing, a novel and energy-saving antifreezing and thawing device is needed.

Disclosure of Invention

The utility model aims to overcome the defects of the background technology and provides an antifreezing and thawing device for a coal storage yard.

The utility model is implemented by the following technical scheme: the antifreezing and thawing device for the coal storage yard is arranged between the boiler and the coal storage yard and further comprises a roller slag cooling machine, a hot air pipe assembly, a heat exchange pipe assembly, an exhaust pipe assembly and a communicating pipe assembly;

the air inlets of one end of the heat exchange tube assemblies are connected with the hot air tube assemblies in parallel, the air outlets of the other end of the heat exchange tube assemblies are communicated with the exhaust tube assemblies,

the tail end of the exhaust pipe assembly is communicated with the flue inlet of the boiler dust remover, one end of the communicating pipe assembly is communicated with the hot air pipe assembly, and the other end of the communicating pipe assembly is communicated with the exhaust pipe assembly.

In the technical scheme, the method comprises the following steps: the underground of coal storage yard arrange a plurality of thermocouple subassembly, the coal storage yard in install the control box, control box and thermocouple subassembly between be connected through electric butterfly valve.

In the technical scheme, the method comprises the following steps: the hot air pipe assembly comprises a hot air branch pipe, a hot air main pipe and a hot air pipe butterfly valve;

one end of the hot air branch pipe is connected with an air outlet of the roller slag cooler, the other end of the hot air branch pipe is connected with a hot air main pipe, the other end of the hot air main pipe is communicated with an air inlet of the heat exchange pipe assembly in parallel, and a hot air pipe butterfly valve is arranged on the hot air main pipe.

In the technical scheme, the method comprises the following steps: the heat exchange tube assembly comprises a plurality of electric butterfly valves and a plurality of sets of heat exchange coils; and the air inlet end of each set of heat exchange coil is provided with an electric butterfly valve, and a plurality of sets of heat exchange coils are connected in parallel and arranged between the hot air main pipe and the exhaust main pipe.

In the technical scheme, the method comprises the following steps: the exhaust pipe assembly comprises an exhaust pipe butterfly valve and an exhaust main pipe; the butterfly valve of the exhaust pipe is arranged on the exhaust main pipe, one side of the exhaust main pipe is connected with the exhaust outlet of the heat exchange coil, and the other end of the exhaust main pipe is communicated with the flue inlet of the boiler dust remover.

In the technical scheme, the method comprises the following steps: the communicating pipe assembly comprises a communicating pipe butterfly valve and a communicating pipe, the communicating pipe butterfly valve is arranged at one end of the communicating pipe, one end of the communicating pipe is welded with the hot air main pipe, and the other end of the communicating pipe is welded with the exhaust main pipe.

The utility model has the following advantages:

1. the utility model uses the heat-discharged air from the roller slag cooler as a heat source to heat the ground of the coal storage yard, which not only can prevent the coal from freezing, but also can quickly defrost the coal after the coal is frozen, and the heat exchange efficiency can reach more than 80%, thereby saving energy.

2. The heat exchange coil pipe is fully paved under the coal yard, so that the whole heating of the coal yard can be realized, the heating can be performed in a partitioned mode, and no heating dead angle exists.

3. All parts of the utility model can be processed by adopting finished equipment and pipes, and the utility model has simple manufacture.

4. The utility model has flexible operation, can automatically put into operation or stop operation according to the temperature, does not need personnel on duty control, and prevents overheating.

Drawings

Fig. 1 is a schematic structural view of the present utility model.

In the figure: the device comprises a roller slag cooler 1, a hot air pipe assembly 2, a hot air branch pipe 21, a hot air main pipe 22, a hot air pipe butterfly valve 23, a heat exchange pipe assembly 3, an electric butterfly valve 31, a heat exchange coil 32, an exhaust pipe assembly 4, an exhaust pipe butterfly valve 41, an exhaust main pipe 42, a communicating pipe assembly 5, a communicating pipe butterfly valve 51, a communicating pipe 52, a thermocouple assembly 6 and a control box 7.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 1, it is shown that: the antifreezing and thawing device for the coal storage yard is arranged between a boiler and the coal storage yard, and further comprises a roller slag cooler 1, a hot air pipe assembly 2, a heat exchange pipe assembly 3, an exhaust pipe assembly 4 and a communicating pipe assembly 5;

a plurality of roller slag cooling machines 1 are connected in parallel, the air outlet of each roller slag cooling machine 1 is connected with the hot air pipe assembly 2, a plurality of heat exchange pipe assemblies 3 are connected in parallel, the air inlet at one end of each heat exchange pipe assembly 3 is connected with the hot air pipe assembly 2, the air outlet at the other end is communicated with the exhaust pipe assembly 4,

the tail end of the exhaust pipe assembly 4 is communicated with the flue inlet of the boiler dust remover, one end of the communicating pipe assembly 5 is communicated with the hot air pipe assembly 2, and the other end of the communicating pipe assembly is communicated with the exhaust pipe assembly 4.

The underground of coal storage yard arrange a plurality of thermocouple assembly 6, the coal storage yard in install control box 7, control box 7 and thermocouple assembly 6 between be connected through electric butterfly valve 31. The control box 7 can control the opening and closing of the electric butterfly valve 31 according to the temperature signal fed back by the thermocouple assembly 6, so that the heating system can be automatically put into operation or shut down without personnel on duty control.

The hot air pipe assembly 2 comprises a hot air branch pipe 21, a hot air main pipe 22 and a hot air pipe butterfly valve 23;

one end of the hot air branch pipe 21 is connected with an air outlet of the roller slag cooler 1, the other end of the hot air branch pipe is connected with the hot air main pipe 22, the other end of the hot air main pipe 22 is communicated with an air inlet of the heat exchange pipe assembly 3 which is connected in parallel, and a hot air pipe butterfly valve 23 is arranged on the hot air main pipe 22. All parts can be processed by adopting finished equipment and pipes, and the manufacturing is simple.

The heat exchange tube assembly 3 comprises a plurality of electric butterfly valves 31 and a plurality of sets of heat exchange coils 32; an electric butterfly valve 31 is arranged at the air inlet end of each set of heat exchange coil 32, and a plurality of sets of heat exchange coils 32 are connected in parallel and arranged between the hot air main pipe 22 and the air exhaust main pipe 42. The heat exchange tube assembly 3 is fully paved under the coal yard in a partitioning way, so that the whole heating of the coal yard can be realized, the heating can be performed in a partitioning way, and no heating dead angle exists.

The exhaust pipe assembly 4 comprises an exhaust pipe butterfly valve 41 and an exhaust main pipe 42; the exhaust pipe butterfly valve 41 is arranged on the exhaust main pipe 42, one side of the exhaust main pipe 42 is connected with the exhaust outlet of the heat exchange coil 32, and the other end is communicated with the flue inlet of the boiler dust remover. All parts can be processed by adopting finished equipment and pipes, and the manufacturing is simple.

The communicating pipe assembly 5 comprises a communicating pipe butterfly valve 51 and a communicating pipe 52, the communicating pipe butterfly valve 51 is arranged at one end of the communicating pipe 52, one end of the communicating pipe 52 is welded with the hot air main pipe 22, and the other end is welded with the exhaust main pipe 42. The communicating pipe assembly 5 can realize that the exhaust gas of the roller slag cooler is directly discharged to the inlet flue of the dust remover through the communicating pipe except for winter, and the heating system stops running, so that spontaneous combustion caused by overheating of a coal yard is prevented.

The utility model also comprises the following concrete implementation processes: firstly, according to the exhaust temperature of a roller slag cooler 1 and the area of a coal storage yard, calculating and determining the specifications of a hot air pipe assembly 2 and an exhaust pipe assembly 4, and further determining the number and the heat exchange area of heat exchange pipe assemblies 3; secondly, processing the pipeline and the pipe fitting according to the calculated parameters, welding and assembling, and simultaneously installing related valves; carrying out a pressure experiment on the heat exchange tube assembly 3 again, and carrying out heat preservation, corrosion prevention and coverage treatment after the heat exchange tube assembly is qualified; finally, the thermocouple assembly 6 and the control box 7 are installed, and the electric butterfly valve 31, the thermocouple assembly 6 and the control box 7 are connected into a whole by using a control cable and are debugged.

When the ambient temperature is lower than 5 ℃, the device is put into operation, a communicating pipe butterfly valve 51 is closed, a hot air pipe butterfly valve 23 and an exhaust pipe butterfly valve 41 are opened, exhaust air of the roller slag cooler 1 enters a heat exchange coil pipe 32 through a hot air main pipe 22, and enters an inlet flue of a boiler dust remover through an exhaust main pipe 42 after heat exchange; the thermocouple assembly 6 feeds back the temperature of the ground of the coal storage yard to the control box, when the ground temperature is lower than 0 ℃, the control box 7 can control the electric butterfly valve 31 to be opened according to a set program, and can also manually control the electric butterfly valve 31 to be opened according to operation requirements, so that a heating area of the coal storage yard is selected, and accordingly, coal freezing or thawing after the occurrence of the coal freezing is prevented, and when the ground temperature is higher than 5 ℃, the control box 7 can automatically control the electric butterfly valve to be closed, and ground heating in the area is stopped.

When the ambient temperature is higher than 5 ℃, the device is stopped, a communicating pipe butterfly valve 51 is opened, a hot air pipe butterfly valve 23 and an exhaust pipe butterfly valve 41 are closed, and exhaust air of the roller slag cooler 1 directly enters an inlet flue of the boiler dust remover through a communicating pipe 52; meanwhile, necessary maintenance is carried out regularly according to the requirement, so that the damage of the heat insulation layer, the leakage of hot air and the corrosion of pipelines are prevented.

The above-mentioned parts, which are not described in detail, are all prior art.

Claims

1. The antifreezing and thawing device for the coal storage yard is arranged between a boiler and the coal storage yard, and further comprises a roller slag cooler (1), a hot air pipe assembly (2), a heat exchange pipe assembly (3), an exhaust pipe assembly (4) and a communicating pipe assembly (5);

the method is characterized in that: the air inlets of one end of the heat exchange tube assemblies (3) are connected with the hot air tube assemblies (2), the air outlets of the other end are communicated with the exhaust tube assemblies (4),

the tail end of the exhaust pipe assembly (4) is communicated with the flue inlet of the boiler dust remover, one end of the communicating pipe assembly (5) is communicated with the hot air pipe assembly (2), and the other end of the communicating pipe assembly is communicated with the exhaust pipe assembly (4).

2. The antifreezing and thawing device for coal storage yards according to claim 1, wherein: the underground of coal storage yard be arranged a plurality of thermocouple subassembly (6), the coal storage yard in install control box (7), control box (7) and thermocouple subassembly (6) between be connected through electric butterfly valve (31).

3. The coal yard antifreezing and thawing device according to claim 1 or 2, wherein: the hot air pipe assembly (2) comprises a hot air branch pipe (21), a hot air main pipe (22) and a hot air pipe butterfly valve (23);

one end of the hot air branch pipe (21) is connected with an air outlet of the roller slag cooler (1), the other end of the hot air branch pipe is connected with the hot air main pipe (22), the other end of the hot air main pipe (22) is communicated with an air inlet of the heat exchange pipe assembly (3) in parallel, and a hot air pipe butterfly valve (23) is arranged on the hot air main pipe (22).

4. The antifreezing and thawing device for coal storage yards according to claim 3, wherein: the heat exchange tube assembly (3) comprises a plurality of electric butterfly valves (31) and a plurality of sets of heat exchange coils (32); an electric butterfly valve (31) is arranged at the air inlet end of each set of heat exchange coil (32), and a plurality of sets of heat exchange coils (32) are connected in parallel and arranged between a hot air main pipe (22) and an exhaust main pipe (42).

5. The antifreezing and thawing device for coal storage yards according to claim 4, wherein: the exhaust pipe assembly (4) comprises an exhaust pipe butterfly valve (41) and an exhaust main pipe (42); the exhaust pipe butterfly valve (41) is arranged on the exhaust main pipe (42), one side of the exhaust main pipe (42) is connected with an exhaust outlet of the heat exchange coil pipe (32), and the other end is communicated with a flue inlet of the boiler dust remover.

6. The antifreezing and thawing device for coal storage yards according to claim 5, wherein: the communicating pipe assembly (5) comprises a communicating pipe butterfly valve (51) and a communicating pipe (52), the communicating pipe butterfly valve (51) is arranged at one end of the communicating pipe (52), one end of the communicating pipe (52) is welded with the hot air main pipe (22), and the other end of the communicating pipe is welded with the exhaust main pipe (42).