CN102692032B - Feeding conveying device for biomass boiler - Google Patents

Abstract

The invention discloses a feed conveying device for a biomass boiler, which includes a hopper, a pusher and a feed compression channel. A fan-shaped door is arranged on a hinge pin outside the hopper, a pre-compression device is installed at the bottom, and the pusher is controlled by a hydraulic pressure. System transmission, the working piston on the pusher is equipped with a position sensor, and the pusher performs reciprocating motion in the said conveying compression channel according to the data provided by the position sensor, and can drive multiple pushers at the same time The intermittent pulse pusher ensures the smoothness and efficiency of the conveying compression channel. The invention has the advantages of few feeding links, low failure rate, high production efficiency, high equipment utilization rate, fully automatic control, and uninterrupted feeding through sequence control.

Description

A feed conveying device for a biomass boiler

technical field

The invention relates to a method and equipment for compressing, transporting and conveying loose solid biomass materials, in particular to a biomass feeding and conveying device, which is mainly used in the biomass power generation industry.

Background technique

At present, most of the boiler feed conveying systems of biomass power plants such as straw power generation in China use crushed straw materials to be delivered by belt conveyors, screw conveyors, and simplified hydraulic piston propulsion devices. The furnace feed bin is sent to the boiler for combustion by one or more sets of screw conveyors at the bottom of the furnace feed bin. the

Due to the characteristics of straw (yellow straw such as rice straw and wheat straw, gray straw such as cotton stalk, etc.), it is easy to be entangled and blocked. In order to meet the normal operating conditions of screw conveyors and other equipment, the straw material must be broken (cut) by using a crusher. The straw material is within the specified length and volume. The crusher has high energy consumption, poor production efficiency, low qualified rate of length, high maintenance cost, heavy dust and other environmental pollution, and it is easy to cause blockage in the crushing process. In order to maintain normal production and ensure a stable supply of crushed straw materials, it is necessary to build a large-capacity furnace reserve silo. The large-capacity storage bin in front of the furnace is easy to cause the straw material to bridge and arch when it enters the screw conveyor through the bottom outlet. Live and drive motor burnout and other faults. The above-mentioned feeding and conveying system has many types of equipment and many links, is not easy to be linked, has a high failure rate, occupies a large area, and has high investment costs for capital construction. the

Contents of the invention

The purpose of the present invention is to provide a biomass feeding and conveying device according to the deficiencies of the above-mentioned prior art. The position sensor on the hydraulically driven material compression feeding propeller adopts a reciprocating propulsion method to ensure the compression and propulsion of biomass. And the smoothness of the conveying compression channel reduces the link of the feeding system. the

The present invention adopts following technical scheme:

A feed conveying device for a biomass boiler, including a hopper and a material compression feed propulsion device, characterized in that a fan-shaped gate puller to prevent arching is installed at the outlet of the hopper, and the material compression feed propulsion The device comprises at least one group of material compression feed propellers, each group of material compression feed propellers is composed of at least two material compression feed propellers, and the front of the material compression feed propellers There is a material delivery compression channel, the material compression feeding propeller completes the reciprocating motion during the material delivery compression process, the inlet of the material delivery compression channel is connected to the outlet of the hopper, and the outlet of the compression channel The feed port is connected to the feed port of the biomass boiler.

The push pistons at the front end of at least two material compression feed pushers in each group are equipped with position sensors, and their reciprocating push strokes are the same, but at the same time point, each material compression feed described in the same group The propelling positions of the propellers in the conveying material compression channels are different. the

An anti-tempering device, a spraying device and a damping device are arranged in the conveying material compression channel. the

The power supply of the material compression feeding propeller comes from at least one group of hydraulic oil cylinders. the

The biomass referred to in the biomass boiler refers to biomass materials of gray straw and yellow straw. the

The advantages of the present invention are: full-automatic control can be realized, uninterrupted feeding can be realized through sequence control, and the reliability of the feeding system can be improved; there are few feeding links, low failure rate, high production efficiency, and high utilization rate of equipment; Small area, high plant utilization rate, saving investment; energy saving, environmental protection; fewer rotating pairs and linear motion pairs, low use and maintenance costs; minimal production environment pollution, low energy consumption and other significant advantages. the

Description of drawings

Figure 1 is a schematic diagram of the structure of the present invention;

Figure 2 is a top view of the structure of the material compression feeding device of the present invention;

Figure 3 is a top view of the structure of the material compression feeding device in Embodiment 2 of the present invention;

Figure 4 is a top view of the structure of the material compression feeding device in Embodiment 3 of the present invention;

Figure 5 is a top view of the structure of the material compression feeding device in Embodiment 4 of the present invention.

Detailed ways

The present invention will be described in further detail below in conjunction with accompanying drawing and specific embodiment. the

As shown in Figure 1-5, the marks 1-14 in the figure are: hopper 1, fan-shaped feeder 2, secondary compression chamber 3, anti-tempering device 4, automatic sprinkler fire extinguishing device 5, and conveying compression channel 6 , damping block 7, material compression feed propeller 8, position sensor 9, material compression feed propeller 10, material compression feed propeller 11, material compression feed propeller 12, material compression feed propeller 13, material The feed pusher 14 is compressed. the

Embodiment 1: As shown in Figure 1, this embodiment is mainly composed of a hopper 1, a material compression feeding propeller 8 and a material delivery compression channel 6, the whole system is driven by a hydraulic system, and a fan-shaped material shifter 2 is installed on the hopper 1 Rely on the hydraulic actuator to swing around the hinge pin to complete the pre-compression and arch-breaking functions. The hinge of the hopper 1 and the material delivery compression channel 6 is the secondary compression chamber 3, and the working piston at the front end of the material compression feed pusher 8 is equipped with a position sensor. 9. Automatically controlled by PLC or industrial control computer, multiple reciprocating advances are automatically completed according to the data fed back by the position sensor 9. The material compression feeding pusher 8 performs linear reciprocating work during the material advancing process to push the material into the feeding compression In the channel 6, the pre-compression and feeding are completed in the conveying compression channel 6, and at the same time the material is pushed to move intermittently several times. After several times of reciprocating propulsion, the material entering the conveying compression channel 6 from the hopper 1 is pushed into the boiler. Inside, the continuous conveying process of materials is realized. the

The anti-tempering device 4, the automatic sprinkler device 5 and the damping device 7 are installed in the conveying compression channel 6. The anti-tempering device 4 is a safety device that prevents backfire after negative pressure is formed during the pushing process, the automatic sprinkler fire extinguishing device 5 is an emergency treatment device when the anti-tempering device 4 fails or is abnormal, and the damping device 7 is used It is used to increase the damping to complete the secondary compression when conveying light and loose straw materials. the

As shown in Figure 2, what is used in this embodiment is a group of two material compression feed propellers driven by a hydraulic cylinder or a motor to realize the material precompression feed propeller 10 and the material compression feed propeller 11. Drive, the two material compression feeding propellers advance reciprocally according to the data obtained by the position sensor 9 at the front end. When the material compression feed propeller 10 is advancing, the material compression feed propeller 11 is in a backward state, and the two material compression feed propellers work together and alternately come and go, thereby completing the continuous feeding of compressed materials.

Embodiment 2: As shown in Figure 3, what this embodiment adopts is a group of three material compression feeding thrusters to work, the material compression feeding thruster 12, the material compression feeding thruster 13 and the material compression feeding thruster. The material pusher 14 is in different working conditions according to the data obtained by the position sensor, that is, at the same time point, it is in different working positions respectively, and each material compression feed pusher is pulsed by the position sensor 9. The time is different, so that the sequential feeding of each material compression feed propeller ensures the continuity of feed to the boiler. The combination of multiple material compression feed propellers is suitable for boilers with large requirements for material delivery . the

Embodiment 3: As shown in Figure 2 and Figure 4, the two material compression feed propellers shown in Embodiment 1 are combined into one group, and three groups are installed side by side to work, which can accommodate greater material throughput quantity. the

Embodiment 4: As shown in Figure 3 and Figure 5, the three material compression feeding propellers shown in Embodiment 2 are combined into one group, and three groups are installed side by side to work, which can accommodate more than Embodiment 3. Large material throughput. the

Those skilled in the art can obviously understand that, according to the boiler's requirements for different biomass material delivery volumes, two or more groups of material compression feed propellers are selected to be used in combination, and for each group of material compression feed propellers Quantity selection can also be selected as a combination of not less than two, and the selection range for biomass raw materials is relatively wide. For example, yellow straws such as rice straw and wheat straw can be used without crushing, and gray straws such as cotton stalks can be used after the initial Broken and ready to use. the

The working mode of the biomass feeding conveying device of the present invention is pulse type. Therefore, when the power plant uses this equipment, the straw material can be directly transported to the boiler feed port fully automatically, so as to continuously feed the material without interruption. the

Claims (4)

1. A feed conveying device for a biomass boiler, comprising a hopper and a material compression feed propulsion device, characterized in that a fan-shaped gate puller to prevent arching is installed at the outlet of the hopper, and the material compression feeds The material propulsion device includes at least one group of material compression feed propellers, each group of material compression feed propellers is composed of at least two material compression feed propellers, and the material compression feed propellers There is a material conveying compression channel in front of the propulsion, and the material compression feeding pusher completes reciprocating motion during the material conveying compression process, the feed port of the material conveying compression channel is connected to the outlet of the hopper, and the compression channel The discharge port of the biomass boiler is connected to the feed port of the biomass boiler, and position sensors are installed on the push pistons at the front ends of at least two material compression feed pushers in each group. The reciprocating push strokes are the same, but at the same time point, The propulsion positions of the material compression feed propellers in the same group are different in the material delivery compression channels where they are located. 2 . A feed conveying device for a biomass boiler according to claim 1 , characterized in that an anti-tempering device, a spray device and a damping device are arranged in the conveying material compression channel. 3. A feed conveying device for a biomass boiler according to claim 1, characterized in that said material compression feed pusher is powered by at least one set of hydraulic cylinders. 4. A feeding and conveying device for a biomass boiler according to claim 1, characterized in that the biomass referred to in the biomass boiler is a biomass material of gray straw or yellow straw.