CN212076977U - A clean production line for biomass pellets - Google Patents

Abstract

The utility model discloses a biomass particle cleaning production line, which comprises a crushing mechanism, a drying mechanism and a granulating mechanism. The drying mechanism is arranged downstream of the crushing mechanism and upstream of the granulating mechanism. The material cleaning production line also includes a dust-proof mechanism, and the dust-proof mechanism includes a negative-pressure dust-collecting hood, which is connected to the air extraction device through a pipeline; compared with the prior art, the utility model has the following advantages: when dust may be generated Set up a negative pressure dust hood at the location of the dust collector to effectively isolate and recycle dust; adopt reasonable separation measures for gas-solid separation, with high processing capacity; use processing intermediate products as fuel to provide heat energy, and intensify production management to reduce costs; the entire production line eliminates All possibilities of dust leakage realize cleaner production.

Description

A clean production line for biomass pellets

technical field

The utility model relates to the field of biomass disposal technology and clean production technology, in particular to a clean production line of biomass particles.

Background technique

The use value of biomass is very high. As a kind of renewable energy, compared with other renewable energy sources such as solar energy, hydrogen energy, wind energy, etc., it has large storage capacity, low investment and utilization risk, high profit return, and is not limited to climate. Due to the limitations of geographical temperature and other conditions, biomass processing plants can be used for direct combustion to generate heat, prepare cellulosic ethanol, solidify and form, etc., which are environmentally friendly and pollution-free, and can reduce the utilization rate of coal combustion and save economic costs. In actual production, there is a lot of dust, dust explosion caused by high dust concentration, and prolonged exposure of the human body to dust will cause problems such as coughing, expectoration, chest tightness, chest pain and difficulty breathing. In the production process, the unloading process and each production link will generate a certain amount of dust, so the problem of dust treatment needs to be paid attention to by the production unit, and the existing straw molding pellet production requires manual control, the production efficiency is low, and it is impossible to achieve no problem. The automatic production of dust cleaning results in limited output of straw shaped particles, high production cost and serious environmental pollution.

Utility model content

The purpose of the utility model is to overcome the deficiencies of the prior art and provide a clean production line for biomass particles.

The utility model is realized by the following technical solutions: a biomass particle cleaning production line, comprising a crushing mechanism, a drying mechanism and a granulating mechanism, and the drying mechanism is arranged downstream of the crushing mechanism and upstream of the granulating mechanism, and is characterized in that : It also includes a dust-proof mechanism, and the dust-proof mechanism includes a negative-pressure dust-collecting cover, which is connected to the air extraction device through a pipeline.

As a further improvement to the above solution, a gas-solid separation device is provided at the inlet of the air extraction device, and the solid phase outlet of the gas-solid separation device is connected to the inlet of the granulation mechanism.

As a further improvement to the above solution, a hanging isolation curtain is arranged on the periphery of the negative pressure dust collecting hood.

As a further improvement to the above scheme, the crushing mechanism includes a coarse material crushing mechanism and a crushing mechanism, the coarse material crushing mechanism is arranged upstream of the crushing mechanism, and the negative pressure dust hood is arranged at the inlet of the coarse material crushing mechanism and the outlet of the coarse material crushing mechanism , one or more of the inlet of the pulverizer and the outlet of the pulverizing mechanism.

As a further improvement to the above scheme, the crushing mechanism also includes a magnetic separation mechanism, the magnetic separation mechanism is arranged between the coarse material crushing mechanism and the crushing mechanism, and the negative pressure dust collecting hood is also arranged at the entrance of the magnetic separation mechanism and/or the magnetic separation mechanism. the exit.

As a further improvement to the above scheme, the material outlet of the granulation mechanism is provided with a negative pressure screening material dedusting mechanism, and the negative pressure screening material dedusting device includes a discharge slideway and a negative pressure bin arranged below the discharge slideway. Screen holes are arranged on the bottom plate of the slideway, and the screen holes are directly connected with the negative pressure bin.

As a further improvement to the above scheme, the material inlet of the granulation mechanism is closed and set, and the material is fed by the auger, and the material inlet of the granulation mechanism is set open, and a negative pressure dust collecting hood is set above it.

As a further improvement to the above solution, a sedimentation storage mechanism is also arranged between the crushing mechanism and the drying mechanism, and the inner cavity of the sedimentation storage mechanism is connected with the air extraction device.

As a further improvement to the above scheme, the hot blast stove configured by the drying mechanism is a biomass hot blast stove, and its raw material comes from the sedimentation storage mechanism or the crushing mechanism.

As a further improvement to the above solution, the drying mechanism includes a hot blast stove, a tumble dryer and a product collection bin. The outlet of the tumble dryer is directly set in the product collection bin, the top of the product collection bin is provided with a gas phase outlet, and the bottom of the product collection bin is set up. The solid-phase outlet is set to be connected with the granulation mechanism, and the gas-phase outlet is connected to the gas-solid separation device.

As a further improvement to the above solution, a storage bin is also provided downstream of the granulation mechanism, and a weighing and bagging mechanism is provided at the outlet of the storage bin.

Compared with the prior art, the utility model has the following advantages: a negative pressure dust collecting hood is arranged at the position where dust may be generated to effectively isolate and recycle the dust; reasonable separation measures are adopted for gas-solid separation, and the processing capacity is high; the use of intermediate processing The product is used as fuel to provide heat energy, and intensive production management reduces costs; the entire production line eliminates all possibilities of dust leakage and realizes clean production.

Description of drawings

FIG. 1 is a schematic structural diagram of the present utility model.

Figure 2 is a schematic view of the structure of the negative pressure dust hood.

Figure 3 is a schematic diagram of the structure of the negative pressure screening material dust removal mechanism.

Detailed ways

The embodiments of the present utility model are described in detail below. The present embodiment is implemented on the premise of the technical solution of the present utility model, and provides detailed implementation methods and specific operation processes, but the protection scope of the present utility model is not limited to the following described embodiment.

A biomass particle cleaning production line includes a crushing mechanism, a drying mechanism and a granulating mechanism 6, the drying mechanism is arranged downstream of the crushing mechanism and upstream of the granulating mechanism 6, and also includes a dust-proof mechanism, and the dust-proof mechanism includes negative pressure. Dust hood 2, the negative pressure dust hood 2 is connected to the air extraction device 81 through a pipeline; according to the actual arrangement of the device, each negative pressure dust hood 2 can be equipped with a separate air extraction device 81 or share a set of air extraction with other devices Device 81; if several negative pressure dust hoods 2 are arranged in adjacent or close positions, a set of air extraction devices 81 can also be used to provide negative pressure for them on the premise of ensuring the dust collection and extraction effect. In the drawings, we use a set of air extraction device 81 to provide negative pressure for all negative pressure dust hoods 2 under the premise that the power of the air extraction device 81 is large enough;

A gas-solid separation device 8 is provided at the inlet of the air extraction device 81, and the solid-phase outlet of the gas-solid separation device 8 is connected to the inlet of the granulation mechanism 6; the solid-phase particles in the dust or fly ash are often very small and easy to be lifted with the air flow. After being separated and collected, it is directly sent to the granulation mechanism 6 to avoid being raised again in other processing operations, and its relatively small amount will not affect the granulation parameters; the number of gas-solid separation devices 8 is based on actual needs and For site layout, one negative pressure dust hood 2 can be configured alone, or several negative pressure dust hoods 2 can be shared or the negative pressure dust hood 2 can be shared with other equipment;

A hanging isolation curtain 21 is arranged on the periphery of the negative pressure dust collecting hood 2; the hanging isolating curtain 21 is usually made of flexible materials for easy installation, and is used to isolate a certain space under the negative pressure dust collecting hood 2 to limit the scope of dust. Thus, the dust collecting effect of the negative pressure dust collecting hood 2 is enhanced;

The crushing mechanism includes a coarse material crushing mechanism 1 and a crushing mechanism 3. The coarse material crushing mechanism 1 is arranged upstream of the crushing mechanism 3, and the negative pressure dust collecting hood 2 can be installed in all places prone to dust leakage, such as the coarse material crushing mechanism 1. The inlet, the outlet of the coarse material crushing mechanism 1, the inlet of the pulverizer and the outlet of the crushing mechanism 3; in the whole processing process of biomass particles, the crushing operation is the main link of dust generation, regardless of whether it is the coarse material crushing mechanism 1 or the crushing mechanism. 3. The crushing chamber is a closed structure, and dust leakage can only occur at the inlet and outlet of the material; by arranging the negative pressure dust collecting hood 2 at the position where dust leakage occurs during the crushing process, dust leakage can be effectively prevented.

The crushing mechanism also includes a magnetic separation mechanism 11. The magnetic separation mechanism 11 is set between the coarse material crushing mechanism 1 and the crushing mechanism 3; ) contains some impurities such as iron nails, which are easy to cause damage to the pulverizer and granulator, so a magnetic separation mechanism 11 is set to remove the corresponding magazines to ensure stable production. The negative pressure dust collecting hood 2 can also be arranged at the inlet of the magnetic separation mechanism 11 and/or the outlet of the magnetic separation mechanism 11 .

The material outlet of the granulation mechanism 6 is provided with a negative pressure screening material dedusting mechanism. The negative pressure screening material dedusting device includes a discharge chute 61 and a negative pressure bin 63 arranged below the discharge chute 61. The discharge chute 61 has a bottom plate. A sieve hole 62 is provided on it, and the sieve hole 62 is directly communicated with the negative pressure chamber 63 . During the granulation process, the outlet of the particles is often in a positive pressure state, and part of the powder is not extruded and will be discharged together with the particles. Through the negative pressure screening and dust removal mechanism, on the one hand, the powder is sieved from the particles, and at the same time, it is set at the bottom. The negative pressure chamber 63 can recover all the dust ejected from the particle outlet. During this process, a large amount of air is blown over the surface of the particles, which can speed up the cooling of the particles and shorten the cooling time before packaging; the negative pressure chamber 63 can be equipped with a separate air extraction device 81 Or share the air extraction device 81 with other equipment such as the negative pressure dust collecting hood 2 (the scheme of sharing the air extraction device 81 with the negative pressure dust collecting hood 2 is adopted in the drawings).

According to the difference of materials and the selection of the granulation mechanism 6, the material inlet of the granulation mechanism 6 can be closed or open; the closed inlet can be fed through the auger, and the closed inlet of the granulation mechanism 6 can effectively avoid the occurrence of flying In the case of ash, the use of Jiaolong feeding can achieve dust-free production; the open inlet is provided with a negative pressure dust hood 2 above it. For raw materials with complex material components, unexpected shutdowns often occur during production. The design of the port can facilitate quick maintenance and troubleshooting.

There is also a sedimentation storage mechanism 4 between the crushing mechanism and the drying mechanism, and the inner cavity of the sedimentation storage mechanism 4 is connected with the air extraction device 81; the crushing mechanism is usually produced intermittently, in order to ensure the continuous production of the drying mechanism and the granulation mechanism 6 , we design the sedimentation storage mechanism 4 to store biomass powder, and use the suction device 81 to pump the sedimentation storage mechanism 4 into negative pressure to avoid dust leakage.

The hot blast stove 51 configured by the drying mechanism is a biomass hot blast stove 51, and its raw material comes from the sedimentation storage mechanism 4 or the crushing mechanism;

The drying mechanism includes a hot blast stove 51, a tumble dryer 5 and a product collection bin 52. The outlet of the tumble dryer 5 is directly set in the product collection bin 52, the top of the product collection bin 52 is provided with a gas phase outlet, and the bottom of the product collection bin 52 is set The solid phase outlet is connected to the granulation mechanism 6, and the gas phase outlet is connected to the gas-solid separation device 8; the existing part of the equipment directly connects the outlet of the tumble dryer 5 to the cyclone dust collector, which causes the cyclone dust collector to have a large workload and serious problems. The drying capacity is limited; in fact, most of the dried powdery biomass can settle directly after being discharged from the tumble dryer 5. The collection bin is designed in this scheme. The powder is separated, and a small part of the fly ash enters the dust collector with the hot air for separation (the gas-solid separation device 8 does not refer to a separate device in this case, but refers to the gas-solid separation system in general, which can be composed of multiple gas-solid separation devices. , and jointly undertake the gas-solid separation task of each unit operation.) A storage bin 7 is also provided downstream of the granulation mechanism 6, and a weighing bagging mechanism 71 is provided at the outlet of the storage bin 7.

The above are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present utility model shall be included in the present utility model. within the scope of protection.

Claims (11)

1. The utility model provides a clean production line of living beings granule, includes broken mechanism, stoving mechanism and granulation mechanism, stoving mechanism set up in broken mechanism's low reaches with granulation mechanism's upper reaches, its characterized in that: the dust-proof device also comprises a dust-proof mechanism, wherein the dust-proof mechanism comprises a negative pressure dust hood, and the negative pressure dust hood is connected with the air extractor through a pipeline.

2. The biomass particle cleaning line as recited in claim 1, further comprising: and a gas-solid separation device is arranged at the inlet of the air exhaust device, and a solid phase outlet of the gas-solid separation device is connected with the inlet of the granulation mechanism.

3. The biomass particle cleaning line as recited in claim 2, wherein: the periphery of the negative pressure dust collection cover is provided with a hanging isolation curtain.

4. A biomass particle cleaning line as claimed in claim 1, 2 or 3, wherein: the crushing mechanism comprises a coarse material crushing mechanism and a crushing mechanism, the coarse material crushing mechanism is arranged at the upstream of the crushing mechanism, and the negative pressure dust collection hood is arranged at one or more of the inlet of the coarse material crushing mechanism, the outlet of the coarse material crushing mechanism, the inlet of the crusher and the outlet of the crushing mechanism.

5. The biomass particle cleaning line as recited in claim 4, wherein: the crushing mechanism comprises a magnetic separation mechanism, the magnetic separation mechanism is arranged between the coarse material crushing mechanism and the crushing mechanism, and the negative pressure dust collection cover is also arranged at an inlet of the magnetic separation mechanism and/or an outlet of the magnetic separation mechanism.

6. A biomass particle cleaning line as claimed in any one of claims 1, 2 or 3, wherein: the negative pressure screening and dedusting device comprises an unloading slide way and a negative pressure bin arranged below the unloading slide way, sieve holes are formed in a bottom plate of the unloading slide way, and the sieve holes are directly communicated with the negative pressure bin.

7. A biomass particle cleaning line as claimed in any one of claims 1, 2 or 3, wherein: the material inlet of the granulating mechanism is arranged in a closed manner or in an open manner, the granulating mechanism feeds materials by the auger in a closed manner, and the material inlet is provided with the negative pressure dust collecting cover above the material inlet in an open manner.

8. A biomass particle cleaning line as claimed in any one of claims 1, 2 or 3, wherein: the crushing mechanism with still be provided with between the stoving mechanism and subside the storage mechanism, subside the storage mechanism inner chamber and be connected with air exhaust device.

9. The biomass particle cleaning line as recited in claim 8, further comprising: the hot blast stove configured by the drying mechanism is a biomass hot blast stove, and the raw material of the hot blast stove is from the sedimentation storage mechanism or the crushing mechanism.

10. A biomass particle cleaning line as claimed in any one of claims 2 or 3, wherein: drying mechanism includes hot-blast furnace, cylinder drying-machine and product collection storehouse, the export of cylinder drying-machine directly set up in the product collection storehouse, the product collection storehouse top sets up the gaseous phase export, and the product collection storehouse bottom sets up solid phase export and is connected with granulation mechanism, gaseous phase exit linkage gas-solid separator.

11. A biomass particle cleaning line as claimed in any one of claims 1, 2 or 3, wherein: a storage bin is further arranged at the downstream of the granulating mechanism, and a weighing and bagging mechanism is arranged at an outlet of the storage bin.

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