CN212962681U - Storage bin type biomass fuel drying device - Google Patents

Abstract

The utility model relates to a storage storehouse formula biomass fuel drying device, including dry storehouse (1), ventilation pipe (2) and heat transfer board (3), ventilation pipe (2) layering is installed in dry storehouse (1), be equipped with a plurality of gas pockets on the pipe wall of ventilation pipe (2), the air heater is connected to the one end of ventilation pipe (2), and the other end passes through the valve can communicate with the external world for the exhaust, heat transfer board (3) set up in dry storehouse (1), let in high temperature liquid in heat transfer board (3). The utility model discloses both guarantee higher heat transfer efficiency and heat utilization efficiency, avoid again that too high temperature leads to volatile organic compounds in the fuel to appear.

Description

Storage bin type biomass fuel drying device

Technical Field

The utility model relates to a biomass drying device, more specifically say, relate to a storage bin formula biomass fuel drying device.

Background

Biomass refers to various organisms produced by photosynthesis using the atmosphere, water, land, and the like. Biomass can be an important component of renewable energy. The biomass fuel generally refers to agricultural and forestry wastes, including agricultural wastes such as various crop straws, rice hulls, peanut shells and the like; also comprises forestry wastes such as branches, barks, roots, sawdust, forestry processing leftover materials and the like; also comprises industrial wastes such as bagasse, vinasse, furfural residue and the like. The biomass has wide sources and a plurality of varieties; the broad biomass also comprises municipal domestic waste

The biomass fuel is widely applied to the fields of heat supply, power generation, gasification, pyrolysis and the like. Many biomass fuels, such as bark, branches, corn cobs, bagasse, distillers grains, furfural residues, cow dung, etc., have natural water contents of up to 50-85%. In the transportation, storage and use processes of the high-moisture fuel, the problems of low economy, large potential safety hazard, large corruption loss, influence on the sanitation of the operation environment, blockage of conveying equipment, influence on the normal operation of equipment such as a boiler and the like exist.

Disclosure of Invention

The to-be-solved technical problem of the utility model lies in providing a storage bin formula biomass fuel drying device, had both guaranteed higher heat transfer efficiency and heat utilization efficiency, avoided too high temperature again to lead to in the fuel volatile organic compounds to appear.

The utility model provides a technical scheme that its technical problem adopted is: the utility model provides a structure warehouse style biomass fuel drying device, includes dry storehouse, ventilation pipe and heat transfer board, the ventilation pipe layering is installed in dry storehouse, be equipped with a plurality of gas pockets on the pipe wall of ventilation pipe, the air heater is connected to the one end of ventilation pipe, and the other end can communicate with the external world through the valve for the exhaust, the heat transfer board sets up in dry storehouse, let in high temperature liquid in the heat transfer board.

In the scheme, a plurality of ventilation pipes are combined into an air supply and exhaust working unit.

In the above scheme, the heat exchange plate adopts a tube-row or plate heat exchanger.

In the scheme, the drying bin is a round bin or a polygonal bin, and the bottom of the drying bin is in a conical hopper shape.

In the scheme, the top of the drying bin is provided with a material homogenizing device.

In the scheme, the four walls of the drying bin are provided with interlayers, high-temperature liquid is introduced into the interlayers, and liquid inlets and liquid outlets of the interlayers are connected with the circulating pump.

In the scheme, the bottom of the drying bin is provided with a discharging sealing door.

In the scheme, the discharging conveyor is arranged below the discharging sealing door, and the feeding conveyor is arranged at the upper part of the drying bin.

In the above scheme, the inside of the fuel bed in the drying bin and the upper part of the fuel bed are provided with the temperature measuring device and the humidity measuring device which are connected with the air heater and the circulating pump.

In the scheme, the top of the drying bin is provided with a rain shelter.

Implement the utility model discloses a storage storehouse formula biomass fuel drying device has following beneficial effect:

1. when the hot air blower is started, hot air enters the fuel bed through the ventilation pipe, and the ventilation pipe is provided with a hole so that the hot air can uniformly pass through the hole. And starting a circulating pump, feeding hot water or hot oil into the interlayer and the heat exchange plate, cooling and then feeding the cooled hot water or hot oil back to the heat exchanger of the electric power plant for heating. The ventilation pipe can supply hot air and also discharge exhaust gas, namely the hot air absorbing moisture in fuel.

2. The utility model adopts a slow-speed, high-material layer and hot air drying method; and low-temperature (generally 50-200 ℃) waste heat resources such as power plant flue gas, air compression system cooling oil, boiler drainage water, steam turbine exhaust and the like can be fully utilized. The waste heat of the power plant is made into low-temperature (generally 40-200 ℃) hot air and hot water (heat conduction oil) through a heat exchanger, the hot air is used for taking away the water of the fuel through a fuel layer, and a heat exchange plate filled with the hot water (or the heat conduction oil) is used for supplementing and heating the fuel layer.

3. Hot air with lower temperature (generally 40-200 ℃) is adopted to take away the water of the fuel through the fuel layer, so that the separation of volatile combustible organic compounds in the fuel caused by high temperature is avoided; the fire risk is small due to the ratio of low-temperature air to high-temperature flue gas; compared with the flue gas, the exhaust gas does not contain gas pollutants, and the exhaust gas can be discharged in an environment-friendly way after dust removal;

4. a thick material layer (more than 0.5 m and up to tens of m) is adopted, hot air flows through pores of the fuel, the heat exchange plate provides heat for the fuel, the heat utilization rate is high, and the drying yield is high;

5. a thick material layer (more than 0.5 m and up to tens of meters) is adopted, so that the occupied area of equipment is small;

6. when unloading, open the sealing door of unloading, the fuel slips from dry storehouse, and the energy consumption of unloading is low, efficient.

Drawings

The invention will be further explained with reference to the drawings and examples, wherein:

fig. 1 is a front view of the storage type biomass fuel drying device of the present invention;

fig. 2 is a top view of the storage type biomass fuel drying device of the present invention.

Detailed Description

In order to clearly understand the technical features, objects, and effects of the present invention, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

As shown in fig. 1-2, the storage bin type biomass fuel drying device of the present invention includes a drying bin 1, a ventilation pipe 2 and a heat exchange plate 3.

The drying bin 1 is a round bin or a polygonal bin, the bottom of the drying bin adopts a cone hopper form, and the four walls of a material layer area are provided with interlayers 1.1 which are supported by pillars 1.2. The bottom of the drying bin 1 is provided with an unloading sealing door 4, the top of the drying bin is provided with a material homogenizing device 6, and the upper surface of the fuel in the drying bin 1 is strickled by the material homogenizing device 6 so as to ensure that the ventilation resistance of all parts of the material pile is equal. The top is provided with a rain shelter 8 which plays a role of shielding. A plurality of layers of ventilation pipes 2 and heat exchange plates 3 are arranged in the drying bin 1. The feeding conveyor 5 is used for adding wet materials to the drying bin 1. The discharging conveyor 7 is used for conveying out the dried fuel.

The ventilation pipe 2 is installed in the drying bin 1 in a layered mode, a plurality of air holes are formed in the pipe wall of the ventilation pipe 2, one end of the ventilation pipe 2 is connected with the air heater, and the other end of the ventilation pipe 2 can be communicated with the outside through a valve and used for discharging exhaust air, namely hot air absorbing moisture in fuel. A plurality of ventilation pipes 2 are combined into a working unit for air supply and air exhaust.

The heat exchange plate 3 adopts a tube-row type or plate type heat exchanger. The heat exchange plate 3 is arranged in the drying bin 1, and high-temperature liquid is introduced into the heat exchange plate 3. And starting the air heater, enabling the hot air ventilation pipe 2 to enter the fuel bed, and opening a hole on the ventilation pipe to enable hot air to uniformly pass through. And starting a circulating pump, feeding hot water (or heat conducting oil) into the interlayer 1.1 and the heat exchange plate 3, cooling and then feeding the hot water back to the heat exchanger of the power plant for heating.

The inside of the fuel bed in the drying bin 1 and the upper part of the fuel bed are provided with a temperature measuring device and a humidity measuring device which are connected with an air heater and a circulating pump and can control the operation of the air heater and the circulating pump. When the fuel meets the drying target moisture requirement, air does not undergo heat exchange, hot air drying is switched into cold air cooling, when the fuel is cooled to be below 40 ℃, the discharging conveyor 7 is started, the discharging sealing door 4 is opened, the fuel slides to the discharging conveyor 7 through the discharging sealing door 4, and the fuel is conveyed out of the drying device through the discharging conveyor 7.

While the embodiments of the present invention have been described with reference to the accompanying drawings, the present invention is not limited to the above-described embodiments, which are merely illustrative and not restrictive, and many modifications may be made by one skilled in the art without departing from the spirit and scope of the present invention as defined in the appended claims.

Claims (10)

1. The utility model provides a warehouse style biomass fuel drying device, its characterized in that, includes dry storehouse (1), ventilation pipe (2) and heat transfer board (3), ventilation pipe (2) layering is installed in dry storehouse (1), be equipped with a plurality of gas pockets on the pipe wall of ventilation pipe (2), the air heater is connected to the one end of ventilation pipe (2), and the other end can communicate with the external world through the valve for the exhaust, heat transfer board (3) set up in dry storehouse (1), let in high temperature liquid in heat transfer board (3), liquid import and export and be connected with the circulating pump.

2. The silo-type biomass fuel drying device of claim 1, characterized in that a plurality of ventilation pipes (2) are combined into an air supply and exhaust working unit.

3. The silo-type biomass fuel drying device of claim 1, characterized in that the heat exchange plates (3) are tube-to-tube or plate heat exchangers.

4. The storage bin type biomass fuel drying device according to claim 1, wherein the drying bin (1) is a round bin or a polygonal bin, and the bottom of the drying bin is conical hopper-shaped.

5. The silo-type biomass fuel drying device of claim 1, characterized in that the top of the drying silo (1) is provided with a material homogenizing device (6).

6. The storage bin type biomass fuel drying device according to claim 1, wherein an interlayer (1.1) is arranged on four walls of the drying bin (1), high-temperature liquid is introduced into the interlayer (1.1), and a liquid inlet and a liquid outlet of the interlayer (1.1) are connected with a circulating pump.

7. The storage bin type biomass fuel drying device according to claim 1, wherein the bottom of the drying bin (1) is provided with a discharging sealing door (4).

8. The storage bin type biomass fuel drying device according to claim 7, wherein a discharging conveyor (7) is arranged below the discharging sealing door (4), and a feeding conveyor (5) is arranged at the upper part of the drying bin (1).

9. The storage bin type biomass fuel drying device according to claim 1, wherein a temperature measuring device and a humidity measuring device are arranged inside the fuel layer and on the upper portion of the fuel layer in the drying bin (1), and the temperature measuring device and the humidity measuring device are connected with a hot air blower and a circulating pump.

10. The storage bin type biomass fuel drying device according to claim 1, wherein a rain shelter (8) is arranged at the top of the drying bin (1).

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