Heating device for pulverized coal burner of asphalt mixing station

Abstract

The utility model relates to a heat supply device for a pulverized coal burner of an asphalt mixing station. The heat supply device comprises a suction silencer, a discharge silencer, a pulverized coal storage tank, an air powder mixer and the pulverized coal burner, wherein the suction silencer and the discharge silencer are connected together through a Roots blower; the pulverized coal storage tank is fixed on a supporting frame of the pulverized coal storage tank; the discharge silencer is connected with a Roots air pipe, and the Roots air pipe is connected with the air powder mixer; a pulverized coal storage tank overhauling ladder is arranged on one side of the pulverized coal storage tank, and a conical middle powder bin is arranged below the pulverized coal storage tank; the bottom of the conical middle powder bin is connected with a feeder, and the lower end of the feeder is connected with the air powder mixer through a discharging adjuster. And the pulverized coal burner is connected with a leaching station boiler system. The combustion efficiency can be effectively improved, and the environment-friendly requirement of construction production is met.

Description

Technical Field

[0001] The utility model relates to the field of mechanical equipment, in particular to a pulverized coal burner heating device for an asphalt mixing station. Background Art

[0002] Asphalt concrete is the most widely used construction material in my country's highway engineering construction, and heat source supply is one of the important construction technical points in asphalt concrete mixing construction. Traditional heat source supply mainly uses heavy oil, coal, natural gas, etc., and the above fuels have gradually withdrawn from the stage of history with the broad consensus on environmental protection, green, and energy conservation in modern society. As a new type of clean desulfurized fuel, pulverized coal not only has the characteristics of continuous and stable combustion, easy adjustment, and controllable combustion atmosphere, but also can effectively improve combustion efficiency, burnout rate, and save resources. At the same time, it can also make the flame clean and the combustion stable, ensuring low-carbon emission reduction, and has excellent performance in environmental protection, energy saving, economy, and safety benefits. Therefore, it is necessary to optimize and transform the burner of the asphalt mixing station to improve the combustion efficiency of the fuel. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a heating device for a coal powder burner of an asphalt mixing station which can improve the combustion efficiency.

[0004] In order to solve the above problems, the utility model discloses a pulverized coal burner heating device for an asphalt mixing station, which is characterized in that: the device comprises a suction muffler and an exhaust muffler connected together by a Roots blower, a pulverized coal storage tank fixed on a pulverized coal storage tank support frame, and an air-powder mixer and a pulverized coal burner connected together; the exhaust muffler is connected with a Roots air duct, which is connected to the air-powder mixer; a pulverized coal storage tank maintenance ladder is provided on one side of the pulverized coal storage tank, and a conical intermediate powder bin is provided below the pulverized coal storage tank; a feeder is connected to the bottom of the conical intermediate powder bin, and the lower end of the feeder is connected to the air-powder mixer through a feed regulator; the pulverized coal burner is connected to the boiler system of the asphalt mixing station.

[0005] The suction muffler is connected to the top of the Roots blower by bolts, and the air outlet of the Roots blower is connected to the discharge muffler through a cast iron sleeve with an air pressure gauge; the outlet of the discharge muffler is connected to the Roots air duct with a vent valve through an air duct check valve.

[0006] The top of the pulverized coal storage tank support frame is vertically welded to the pulverized coal storage tank, and the lower end is fixed to the foundation concrete through support frame anchor bolts.

[0007] The four corners of the coal powder storage tank support frame are welded with reinforcement cross braces, and the reinforcement cross braces are welded by cast iron steel pipes with an outer diameter of 20 cm and a wall thickness of 3 mm.

[0008] The pulverized coal storage tank and the pulverized coal storage tank inspection ladder are transversely welded into a whole, and the two have the same length.

[0009] The pulverized coal storage tank is connected with the conical intermediate pulverized coal bin and the feeder in sequence through a cast iron pipeline.

[0010] The feed regulator is arranged at the central vertical lower end of the feeder.

[0011] The left and right sides of the air-powder mixer are respectively provided with an air inlet and an air outlet, and the upper end is provided with a feed inlet; the feed inlet is connected to the feeder; the air inlet is connected to the Roots air duct; the air outlet is horizontally connected to the pulverized coal burner through a flexible air duct by bolts.

[0012] The pulverized coal burner is laterally connected to the asphalt mixing station boiler system by a threaded flange and is located at the front end of the asphalt mixing station boiler system.

[0013] Compared with the prior art, the utility model has the following advantages:

[0014] 1. The utility model can be put into operation by connecting the Roots blower, the pulverized coal burner and the flexible air duct to the pulverized coal storage tank, which occupies a small area, saves temporary land cost, has a simple structure, good integrity, and is convenient for installation site transfer and transportation.

[0015] 2. The utility model is equipped with a pulverized coal burner, a feed regulator and a vent valve. The air supply volume and pulverized coal input volume can be changed as needed through the operating platform, and the furnace temperature and flame length can be adjusted within a wide range to meet the actual construction asphalt aggregate heating needs. At the same time, it is easy to ignite, the temperature rise time is shortened during heating, the thermal efficiency is high, the combustion is complete, and there are very few dust and nitrogen sulfides in the exhaust gas after combustion, which meets the environmental protection requirements of construction production.

[0016] 3. The pulverized coal burner in the utility model is easy to ignite, heats up quickly, has low noise, and greatly improves work efficiency; the flame temperature is high, energy is saved, combustion is complete, the temperature field inside the pulverized coal burner is uniform, the heated coverage area of ​​the heated body in the furnace is large, the service life is extended, continuous production is possible, there is no need to clean slag every day, and production efficiency is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The specific implementation of the utility model is further described in detail below with reference to the accompanying drawings.

[0018] Figure 1 It is a structural schematic diagram of the utility model.

[0019] In the figure: 1-suction muffler; 2-air pressure gauge; 3-discharge muffler; 4-air duct check valve; 5-vent valve; 6-Roots air duct; 7-coal powder storage tank support frame; 8-reinforcement cross brace; 9-conical intermediate powder silo; 10-coal powder storage tank; 11-support frame anchor bolt; 12-air-powder mixer; 13-feeder; 14-feeding regulator; 15-coal powder storage tank maintenance ladder; 16-flexible air duct; 17-coal powder burner; 18-asphalt mixing station boiler system. DETAILED DESCRIPTION

[0020] like Figure 1 As shown, a pulverized coal burner heating device for an asphalt mixing plant includes a suction muffler 1 and an exhaust muffler 3 connected together by a Roots blower, a pulverized coal storage tank 10 fixed on a pulverized coal storage tank support frame 7, and an air-powder mixer 12 and a pulverized coal burner 17 connected together.

[0021] The exhaust silencer 3 is connected to a Roots air duct 6, which is connected to an air-powder mixer 12; a coal powder storage tank maintenance ladder 15 is provided on one side of the coal powder storage tank 10, and a conical intermediate powder bin 9 is provided below the coal powder storage tank 10; a feeder 13 is connected to the bottom of the conical intermediate powder bin 9, and the lower end of the feeder 13 is connected to the air-powder mixer 12 through a feed regulator 14; the coal powder burner 17 is connected to the asphalt mixing station boiler system 18.

[0022] The suction muffler 1 is connected to the top of the Roots blower by bolts, and the air outlet of the Roots blower is connected to the discharge muffler 3 through a cast iron sleeve with an air pressure gauge 2; the outlet of the discharge muffler 3 is connected to the Roots air duct (6) with an air release valve 5 through an air duct check valve 4. The Roots blower, the suction muffler 1 and the discharge muffler 3 serve as the air supply system of the entire heating device. The air pressure gauge 2 and the air duct check valve 4 control the air pressure and the amount of coal powder blown in, and prevent the wind swirl from affecting the air pressure.

[0023] The top of the pulverized coal storage tank support frame 7 is vertically welded to the pulverized coal storage tank 10, and the lower end is fixed to the foundation concrete by the support frame anchor bolts 11.

[0024] The four corners of the coal powder storage tank support frame 7 are welded with reinforcement cross braces 8 , which are welded from cast iron steel pipes with an outer diameter of 20 cm and a wall thickness of 3 mm, and serve as a basic support system for the coal powder storage tank 10 as a whole.

[0025] The pulverized coal storage tank 10 and the pulverized coal storage tank inspection ladder 15 are horizontally welded into a whole, the two have the same length, and are welded and erected with the tank body foundation support system.

[0026] The pulverized coal storage tank 10 is connected to the conical intermediate pulverized coal bin 9 and the feeder 13 in sequence through a cast iron pipeline, serving as a pulverized coal fuel supply system.

[0027] A feed regulator 14 is disposed at the central vertical lower end of the feeder 13 , through which the coal powder feed supply amount is controlled, thereby adjusting the heating temperature of the asphalt aggregate of the coal powder burner 17 .

[0028] An air inlet and an air outlet are respectively provided on the left and right sides of the air-powder mixer 12, and a feed port is provided at the upper end; the feed port is connected to the feeder 13; the air inlet is connected to the Roots air duct 6; the air outlet is horizontally connected to the pulverized coal burner 17 through the flexible air duct 16 by bolts, serving as an air-powder mixed fuel delivery system.

[0029] The pulverized coal burner 17 is horizontally connected to the asphalt mixing station boiler system 18 by a threaded flange and is located at the front end of the asphalt mixing station boiler system 18. The pulverized coal burner 17 is produced by Shaanxi Silk Capital Petrochemical Co., Ltd., and the specification model is: 5000 type.

[0030] Working principle:

[0031] Driven by the air flow pressure provided by the Roots blower, the air powder enters the pulverized coal burner 17 along the flexible air duct 16. When passing through the ignition device set in the pulverized coal burner 17, it is ignited by the open flame of the ignition device and sent to the boiler system together to complete full combustion, providing heat for the asphalt mixing station boiler system and ensuring the heating temperature quality of asphalt and aggregate.

Claims

1. A pulverized coal burner heating device for an asphalt mixing station, characterized in that: The device comprises a suction muffler (1) and a discharge muffler (3) connected together via a Roots blower, a pulverized coal storage tank (10) fixed on a pulverized coal storage tank support frame (7), and an air-powder mixer (12) and a pulverized coal burner (17) connected together; the discharge muffler (3) is connected to a Roots air duct (6), and the Roots air duct (6) is connected to the air-powder mixer (12); a pulverized coal storage tank maintenance ladder (15) is provided on one side of the pulverized coal storage tank (10), and a conical intermediate powder bin (9) is provided below the pulverized coal storage tank (10); a feeder (13) is connected to the bottom of the conical intermediate powder bin (9), and the lower end of the feeder (13) is connected to the air-powder mixer (12) via a feed regulator (14); and the pulverized coal burner (17) is connected to an asphalt mixing station boiler system (18).

2. The asphalt mixing plant pulverized coal burner heating device according to claim 1, characterized in that: The suction muffler (1) is connected to the top of the Roots blower via bolts, and the air outlet of the Roots blower is connected to the discharge muffler (3) via a cast iron sleeve with an air pressure gauge (2); the outlet of the discharge muffler (3) is connected to a Roots air duct (6) with an air release valve (5) via an air duct check valve (4).

3. The asphalt mixing plant pulverized coal burner heating device according to claim 1, characterized in that: The top of the pulverized coal storage tank support frame (7) is vertically welded to the pulverized coal storage tank (10), and the lower end is fixed to the foundation concrete via support frame anchor bolts (11).

4. A pulverized coal burner heating device for an asphalt mixing plant as claimed in claim 3, characterized in that: The four corners of the coal powder storage tank support frame (7) are welded with reinforcement cross braces (8), and the reinforcement cross braces (8) are welded and made of cast iron steel pipes with an outer diameter of 20 cm and a wall thickness of 3 mm.

5. The asphalt mixing plant pulverized coal burner heating device according to claim 1, characterized in that: The pulverized coal storage tank (10) and the pulverized coal storage tank inspection ladder (15) are transversely welded into a whole, and the two have the same length.

6. The asphalt mixing plant pulverized coal burner heating device according to claim 1, characterized in that: The pulverized coal storage tank (10) is connected in sequence to the conical intermediate pulverized coal bin (9) and the feeder (13) via a cast iron pipeline.

7. The asphalt mixing plant pulverized coal burner heating device according to claim 1, characterized in that: The feed regulator (14) is provided at the central vertical lower end of the feeder (13).

8. The asphalt mixing plant pulverized coal burner heating device according to claim 1, characterized in that: The air-powder mixer (12) is provided with an air inlet and an air outlet on its left and right sides respectively, and a feed inlet is provided on its upper end; the feed inlet is connected to the feeder (13); the air inlet is connected to the Roots air duct (6); the air outlet is horizontally connected to the pulverized coal burner (17) via a flexible air duct (16) via bolts.

9. The asphalt mixing plant pulverized coal burner heating device according to claim 1, characterized in that: The pulverized coal burner (17) is laterally connected to the asphalt mixing station boiler system (18) by means of a threaded flange and is located at the front end of the asphalt mixing station boiler system (18).

Images