CN210398866U

CN210398866U - Thermoelectric boiler suitable for high-calorific-value coal

Info

Publication number: CN210398866U
Application number: CN201920973869.2U
Authority: CN
Inventors: 余开明
Original assignee: Jiangsu Aoxie Chemical Co Ltd
Current assignee: Jiangsu Aoxie Chemical Co Ltd
Priority date: 2019-06-26
Filing date: 2019-06-26
Publication date: 2020-04-24
Anticipated expiration: 2029-06-26

Abstract

The utility model discloses a thermoelectric boiler suitable for high calorific value coal, including furnace, furnace's lateral wall is equipped with the coal feeding mouth, tuber pipe once of furnace's bottom fixedly connected with, the steam pocket is connected to furnace's top, a serial communication port, furnace is connected with cyclone group, cyclone group is connected with the over heater, air heater is connected to the over heater, air heater has secondary air fan through the pipe connection, be equipped with the overgrate air pipe between air heater and the furnace, overgrate air pipe and furnace's inside intercommunication, the overgrate air pipe is tangent with furnace's inner wall, be connected with the exhaust fan between furnace and the cyclone group jointly, the coal feeding mouth is equipped with the coal feeding device. The method can improve the gas flow of oxygen entering the boiler and ensure the utilization rate of high-calorific-value coal.

Description

Thermoelectric boiler suitable for high-calorific-value coal

Technical Field

The utility model relates to a boiler field, concretely relates to thermoelectric boiler suitable for high calorific value coal.

Background

The thermoelectric boiler is a device which burns coal in the boiler by a power-on heating mode, then heats water by heat generated after the coal is burnt, and then generates electricity by the water, wherein electric energy required by the boiler for burning the coal is far less than heat emitted by the coal burning.

In order to increase the efficiency of coal combustion in a boiler during the combustion of coal in the boiler, coal is generally crushed and then fed into the boiler for combustion, and the area of the crushed coal released from air in the boiler is increased, thereby improving the efficiency of coal combustion. However, the combustion efficiency of the coal in the boiler is improved by grinding the coal, the consumption speed of oxygen in the boiler is increased, and flue gas generated by incomplete combustion of the coal is easy to separate from the boiler along with hot air, so that the utilization rate of the high-calorific-value coal is reduced.

Disclosure of Invention

In order to overcome the not enough among the prior art, the utility model provides a thermoelectric boiler suitable for high calorific value coal, it can improve the tolerance that oxygen entered into in the boiler, guarantees the utilization ratio of high calorific value coal.

In order to realize the above-mentioned purpose, the utility model discloses a thermoelectric boiler suitable for high calorific value coal, including furnace, furnace's lateral wall is equipped with the coal feeding mouth, tuber pipe of furnace's bottom fixedly connected with, the steam pocket is connected to furnace's top, a serial communication port, furnace is connected with cyclone group, cyclone group is connected with the over heater, air heater is connected to the over heater, air heater has secondary air fan through the pipe connection, be equipped with the overgrate air pipe between air heater and the furnace, overgrate air pipe and furnace's inside intercommunication, the overgrate air pipe is tangent with furnace's inner wall, be connected with the exhaust fan between furnace and the cyclone group jointly, the coal feeding mouth is equipped with the coal feeding.

Furthermore, a material returning device is fixedly connected to the bottom side of the cyclone separator group, the material returning device is connected with an inclined tube, and the inclined tube is communicated with the interior of the hearth.

Further, the secondary air pipe comprises an inner half pipe and an outer half pipe, the outer ring of the inner half pipe is attached to the inner ring of the outer half pipe, and the outer wall of the outer half pipe is attached to the inner wall of the hearth.

Furthermore, the air preheater is in a C-shaped pipe shape, and the primary air pipe is connected to the bottom side of the C-shaped air preheater.

Furthermore, the cyclone separator group is connected with a coal economizer which is connected with a high-efficiency filter through a pipeline, and the high-efficiency filter is connected with a draught fan.

Furthermore, the coal feeding device comprises a coal pulverizer, the coal pulverizer is connected with a feeding fan, and the feeding fan is connected with the coal feeding port.

Has the advantages that: 1. the secondary air pipe is arranged, so that the air inlet way of the air in the boiler is increased, and the oxygen content in the boiler is ensured;

2. the secondary air pipe is tangent to the inside of the boiler, after the secondary air pipe admits air, the air in the secondary air pipe enables the air in the boiler to rotate around the axis of the boiler along the tangent line of the boiler, the purpose of stirring the gas in the boiler is achieved, and the exchange quantity of the gas in the boiler and the secondary air pipe is ensured.

Drawings

The invention will be further described and illustrated with reference to the accompanying drawings.

FIG. 1 is a schematic structural view of the whole of the present embodiment;

FIG. 2 is a schematic diagram of an air preheater;

fig. 3 is a schematic structural view showing the connection relationship between the inner half pipe and the outer half pipe.

Reference numerals: 1. a hearth; 2. a coal feeding port; 3. a primary air duct; 4. a steam drum; 5. a cyclone separator group; 6. a superheater; 7. an air preheater; 8. a secondary air fan; 9. a secondary air duct; 91. an inner half pipe; 92. an outer half pipe; 10. an exhaust fan; 11. a material returning device; 12. an inclined tube; 13. a coal economizer; 14. a high efficiency filter; 15. a coal pulverizer; 16. a feeding fan; 17. an induced draft fan; 18. a primary air blower.

Detailed Description

The technical solution of the present invention will be more clearly and completely explained by the description of the preferred embodiments of the present invention with reference to the accompanying drawings.

Example (b): thermoelectric boiler suitable for high calorific value coal, including furnace 1, the lateral wall of furnace 1 is equipped with coal feed mouth 2, and the coal enters into furnace 1 from coal feed mouth 2 and burns, and the bottom side fixed connection of furnace 1 has a tuber pipe 3, and a tuber pipe 3 is connected with primary air fan 18, and a tuber pipe 3 provides oxygen coal supply burning in to furnace 1. The upper portion of furnace 1 is connected with cyclone 5, is equipped with exhaust fan 10 between cyclone 5 and the furnace 1 and flows with the auxiliary gas, and cyclone 5 includes the cyclone that two connect gradually, and the export of cyclone 5 is the gas outlet after furnace 1 burns. The steam drum 4 is arranged above the hearth 1, a water pipe is arranged on the side wall of the hearth 1 and communicated with the steam drum 4, coal in the hearth 1 heats the steam drum 4 through combustion, water in the steam drum 4 is heated to generate steam, the steam drum 4 is connected with a steam turbine and pushes the steam turbine to do work through the steam in the steam drum 4, and the steam turbine generates electricity through the generator.

The coal feeding port 2 of the boiler is connected with a feeding device, the feeding device comprises a coal pulverizer 15, the coal pulverizer 15 is connected with a feeding fan 16, an air outlet of the feeding fan 16 is connected with the boiler, and an air inlet of the feeding fan 16 is connected with the coal pulverizer 15. The pulverized coal is blown into the furnace 1 by a feeding fan 16 to be combusted after being crushed by a coal pulverizer 15.

The cyclone separator group 5 is provided with a superheater 6, the superheater 6 is a repeatedly bent pipe, the tubular superheater 6 is communicated with the steam pocket 4, the superheater 6 belongs to a technical means which is commonly used and well known in the field, the superheater 6 mainly has the function of enabling water vapor in the steam pocket 4 to be emitted into the superheater 6, water in the steam pocket 4 continuously exists in the steam pocket 4, the superheater 6 utilizes boiler waste heat to continuously emit the water vapor into the superheater 6, accordingly, the temperature of the water vapor is further increased to form superheated water vapor, and the superheated water vapor is convenient for pushing a steam turbine to work.

The bottom of the cyclone separator group 5 is fixedly connected with a material returning device 11, the bottom of the material returning device 11 is fixedly connected with an inclined tube 12, and the inclined tube 12 is communicated with the hearth 1. The tail part of the cyclone separator group 5 is provided with an economizer 13, the economizer 13 is a pipe which is repeatedly bent, the economizer 13 belongs to the technical means which are commonly used and well known in the field, the economizer 13 is provided with a water inlet and a water outlet, the water inlet is externally connected with cooling water outside the boiler, and the water outlet is connected with the steam pocket 4. The economizer 13 receives the waste heat at the tail part of the boiler, and the waste heat preheats the cooling water introduced into the steam pocket 4 from the outside, thereby improving the heat utilization rate of the coal and reducing the coal loss.

The material returning device 11 is a hollow cylindrical object, the shape of the material returning device is J-shaped, the material returning device 11 mainly plays a role of buffering the incompletely burnt soot solids discharged by the cyclone separator group 5, and the partially incompletely burnt soot solids are stably sent into the hearth 1 through the inclined tube 12.

As shown in fig. 2, an air preheater 7 is fixedly connected to the rear of the boiler, the air preheater 7 is in the shape of a C-shaped pipe, and the air preheater 7 absorbs heat from the waste heat of the rear of the boiler and preheats the air blown into the furnace 1 by the primary air duct 3. In order to increase the oxygen content in the boiler, therefore air heater 7 still is connected with secondary air pipe 9, and secondary air pipe 9 is connected with secondary air blower 8, and secondary air pipe 9 and air heater 7 intercommunication to secondary air pipe 9 is connected with furnace 1, but secondary air pipe 9 and primary air pipe 3 do not communicate, is equipped with two different wind channels in consequently air heater 7 in order to supply primary air pipe 3 and secondary air pipe 9 to ventilate respectively.

As shown in fig. 3, the end of the secondary air duct 9 extends into the furnace 1, and the secondary air duct 9 extending into the furnace 1 comprises an inner half-duct 91 and an outer half-duct 92, the inner half-duct 91 and the outer half-duct 92 are communicated with each other, and the outlets of the inner half-duct 91 and the outer half-duct 92 are tangential to the inner wall of the boiler. The inner wall of the outer half-pipe 92 and the outer wall of the inner half-pipe 91 are mutually attached, and the outer wall of the outer half-pipe 92 is fixed with the inner wall of the hearth 1.

The afterbody of boiler still is equipped with tail gas processing apparatus, and tail gas processing apparatus includes the high efficiency filter 14 with boiler afterbody fixed connection, and high efficiency filter 14 is connected with draught fan 17. Under the effect of draught fan 17, the gas of boiler afterbody discharges into the atmosphere through high efficiency filter 14, draught fan 17 and chimney in proper order, and high efficiency filter 14 filters gas once more after cyclone carries out prefiltering, and high efficiency filter 14 is the very little net of multilayer aperture, can filter the solid that the diameter is littleer, reduces the waste material and discharges into the atmosphere.

The above detailed description merely describes the preferred embodiments of the present invention and does not limit the scope of the present invention. Without departing from the design concept and spirit scope of the present invention, the ordinary skilled in the art should belong to the protection scope of the present invention according to the present invention provides the text description and drawings to the various modifications, replacements and improvements made by the technical solution of the present invention. The scope of protection of the present invention is determined by the claims.

Claims

1. Thermoelectric boiler suitable for high calorific value coal, including furnace (1), the lateral wall of furnace (1) is equipped with send coal mouth (2), the bottom fixed connection of furnace (1) has primary air pipe (3), steam pocket (4) are connected to the top of furnace (1), its characterized in that, furnace (1) is connected with cyclone group (5), cyclone group (5) are connected with over heater (6), over heater (6) connect air heater (7), air heater (7) have secondary fan (8) through the pipe connection, be equipped with secondary tuber pipe (9) between air heater (7) and furnace (1), secondary tuber pipe (9) and the inside intercommunication of furnace (1), secondary tuber pipe (9) are tangent with the inner wall of furnace (1), be connected with exhaust fan (10) between furnace (1) and the cyclone group (5) jointly, the coal feeding port (2) is provided with a coal feeding device.

2. The thermal power boiler adapted to high calorific value coal according to claim 1, characterized in that a return feeder (11) is fixedly connected to the bottom side of the cyclone group (5), said return feeder (11) being connected to an inclined tube (12), said inclined tube (12) being in communication with the interior of the furnace (1).

3. The thermal power boiler adapted to high heating value coal according to claim 1, wherein the secondary air duct (9) comprises an inner half-duct (91) and an outer half-duct (92), the outer ring of the inner half-duct (91) and the inner ring of the outer half-duct (92) are attached to each other, and the outer wall of the outer half-duct (92) is attached to the inner wall of the furnace (1).

4. A thermal power boiler adapted for high calorific value coal, according to claim 1, wherein the air preheater (7) is shaped as a "C" -shaped tube, the primary air duct (3) being connected to the bottom side of the C-shaped air preheater (7).

5. The thermal power boiler suitable for high heating value coal according to claim 1, characterized in that the cyclone separator set (5) is connected with an economizer (13), the economizer (13) is connected with a high efficiency filter (14) through a pipeline, and the high efficiency filter (14) is connected with an induced draft fan (17).

6. The thermal power boiler adapted for high calorific value coal according to claim 1, wherein the coal feeding means comprises a coal pulverizer (15), a feeding fan (16) is connected to the coal pulverizer (15), and the feeding fan (16) is connected to the coal feeding port (2).