Lump coal gasification raw material conveying and dedusting environment-friendly device

Abstract

The utility model relates to the technical field of environmental protection, and particularly discloses a lump coal gasification raw material conveying and dust removing environmental protection device which comprises a vehicle in-out warehouse area, a raw material coal warehouse, feeding equipment, crushing equipment, screening equipment and conveying equipment which are arranged along the advancing direction of raw materials, wherein the conveying equipment is connected between the raw material coal warehouse and each link of a gasification workshop section; a spraying pipeline is arranged above the vehicle garage entering area, a water collecting channel is arranged below the vehicle garage entering area, a vehicle wheel washing machine is arranged below the vehicle garage exiting area, the water collecting channel and a drainage channel of the vehicle wheel washing machine are connected to a sewage settling pond, and the upper portion of the sewage settling pond is connected to a water inlet of the spraying pipeline vehicle wheel washing machine through a pump and a pipeline. The raw material coal warehouse is provided with a fog gun machine; the upper portions of the feeding device, the crushing device and the screening device are all connected to a bag-type dust remover, and a dry fog dust suppression device is arranged above the conveying device. The system is designed and arranged aiming at each link of lump coal gas production, the generation of dust is inhibited, and the collected dust is treated and recycled.

Description

Technical Field

[0001] This utility model belongs to the field of environmental protection technology and relates to an environmental protection device for conveying and removing dust from raw materials for coal gasification. Background Technology

[0002] As an important fossil fuel, lump coal is often used industrially to produce gaseous fuels such as carbon monoxide, hydrogen, and methane. After purification, these gases can be used as industrial fuels, chemical feedstocks, or city gas. Coal-to-gasification is an important way to convert coal resources into clean energy, and it is of great significance for optimizing the energy structure and promoting sustainable development.

[0003] During the transportation of raw materials for coal gasification, some materials are transported in an open manner. The dust generated in multiple stages, such as warehousing, transfer, conveying, and screening, has a significant impact on the environment. It is difficult to meet the relevant requirements by using a single dust suppression method. Summary of the Invention

[0004] This utility model provides a dust removal and environmental protection device for conveying raw materials for lump coal gasification. It is designed and laid out for each stage of lump coal gasification to suppress dust generation and process and reuse the collected dust.

[0005] The technical solution of this utility model is to provide a dust removal and environmental protection system for conveying raw materials for coal gasification, including a vehicle entry and exit area, a raw coal warehouse, feeding equipment, crushing equipment, and screening equipment arranged along the direction of raw material travel, as well as conveying equipment connecting the raw coal warehouse to each link of the gasification section; wherein the vehicle entry and exit area is divided into a vehicle entry area and a vehicle exit area, a spray pipe is provided above the vehicle entry area and a water collection channel is provided below the vehicle entry area, a vehicle wheel washing machine is provided below the vehicle exit area, the water collection channel and the drainage channel of the vehicle wheel washing machine are connected to a sewage sedimentation tank, and the sewage sedimentation tank is connected to the inlet of the spray pipe and the vehicle wheel washing machine through pumps and pipes respectively; mist cannons are arranged at the unloading point, transfer point and exit point of the raw coal warehouse; bag dust collectors are connected above the feeding equipment, crushing equipment and screening equipment, and a dry fog dust suppression device is installed above the conveying equipment.

[0006] Furthermore, the wastewater sedimentation tank is an inclined plate sedimentation tank, with the angle between the inclined plate and the horizontal plane being 60°.

[0007] Furthermore, the outlet of the sewage sedimentation tank is equipped with a bar screen with a mesh size of ≤1cm.

[0008] Furthermore, dust collection hoods are respectively installed above the feeding equipment, crushing equipment and screening equipment, and the dust collection hoods are connected to the bag filter dust collector through pipes and pumps.

[0009] Furthermore, the system also includes a return coal storage area, and the flue ash from screening equipment, bag filter dust collectors, and gasification section is transported to the return coal storage area via a scraper conveyor.

[0010] Furthermore, a humidifying mixer is also provided between the buried scraper conveyor and the return coal storage, and multiple sets of nozzles are installed inside the mixer.

[0011] Furthermore, a mist cannon is also installed at the unloading point of the humidifying mixer in the return coal storage area.

[0012] This utility model has the following beneficial effects:

[0013] The system provided by this utility model designs different dust suppression and collection schemes for each stage of lump coal transportation to the warehouse, feeding, crushing, screening, and conveying. In the transportation to the warehouse stage, the coal and its transport vehicles are first sprayed with water to humidify them before unloading, controlling dust generation at the source. Simultaneously, when the transport vehicles leave the warehouse after unloading, they are cleaned by a vehicle wheel washing machine to reduce coal ash dust being carried out of the plant area. Wastewater generated during the humidification process and the wheel washing machine is collected and returned to a wastewater sedimentation tank; the clarified liquid is then recycled after sedimentation. In the feeding, crushing, and screening stages, dust is collected and treated using baghouse dust collectors. The resulting coal ash or coal powder is mixed with water to control dust before reuse. The conveying equipment uses enclosed material guides and / or dry fog dust suppression to reduce dust overflow.

[0014] This invention controls the transportation, feeding, and conveying of lump coal in the process of lump coal gasification, ensuring that the on-site working environment meets the requirements. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model. Detailed Implementation

[0016] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, those skilled in the art will understand that the following embodiments are only used to illustrate the present invention and should not be regarded as limiting the scope of the present invention.

[0017] This utility model provides a dust removal and environmental protection system for conveying raw materials for lump coal gasification, such as... Figure 1As shown (some pumps and equipment are not shown in the figure for better layout), it includes a vehicle entry / exit area 1, a raw coal warehouse 2, a feeding device 3, a crushing device 4, and a screening device 5 arranged along the direction of raw material movement. It also includes a conveyor device 6 connecting the raw coal warehouse to each link of the gasification section. The vehicle entry / exit area is divided into a vehicle entry area 1-1 and a vehicle exit area 1-2. A spray pipe is installed above the vehicle entry area and a water collection channel is installed below it. A vehicle wheel washing machine is installed below the vehicle exit area. The water collection channel and the drainage channel of the vehicle wheel washing machine are connected to a sewage sedimentation tank 1-3. The sewage sedimentation tank is connected to the spray pipe and the water inlet of the vehicle wheel washing machine through pumps and pipes. Fog cannons 7 are arranged at the unloading point, transfer point, and exit point of the raw coal warehouse. Bag dust collectors 8 are connected above the feeding device, crushing device, and screening device. A dry fog dust suppression device 9 is installed above the conveyor equipment.

[0018] In some embodiments, the wastewater sedimentation tank is an inclined plate sedimentation tank, with the inclined plate at an angle of 60° to the horizontal plane. By introducing the inclined plate sedimentation tank, the settling time of the wastewater is shortened, the treatment efficiency is improved, the clarified liquid after settling can be reused in the vehicle entry and exit area, and the slurry after settling is subjected to pressure filtration treatment, with the filter residue discharged and the filtrate returned to the wastewater sedimentation tank for circulation.

[0019] In some embodiments, a bar screen with a mesh size ≤1cm is provided at the outlet of the wastewater sedimentation tank. The bar screen prevents large particles and floating debris from entering the spray pipes or vehicle wheel washing system and clogging the pipes.

[0020] In some embodiments, dust collection hoods are respectively installed above the feeding device, crushing device, and screening device. The dust collection hoods are connected to a bag filter dust collector via pipes and pumps. One or more bag filters are installed as needed. The bag filter dust collector is a dry, high-efficiency dust collection device that produces dust with a high coal powder content, which can be recycled and reused.

[0021] In some embodiments, the system further includes a return coal storage 10, from which flue dust from the screening equipment, baghouse dust collector, and gasification section is transported to the return coal storage 10 via a submerged scraper conveyor 11. The coal dust from the screening equipment, the coal dust intercepted by the baghouse dust collector, and the flue dust generated by the gasification section are all collected by the submerged scraper conveyor. The submerged scraper conveyor has a closed-section shell, which can maximize the control of dust diffusion. Simultaneously, it can be configured with multiple feeding and unloading points, allowing for flexible arrangement according to site conditions.

[0022] In a more preferred embodiment, since the material dust content in the buried scraper conveyor is high, a humidifying mixer 12 is added between it and the return coal storage. The powder is sprayed with moisture by multiple sets of nozzles installed on the upper part of the mixer, and at the same time, it is mixed to form large particles or lumps, thereby reducing the generation of dust during unloading and transfer.

[0023] In some embodiments, a mist cannon 7 is also arranged at the unloading point of the humidifying mixer in the return coal silo. The mist cannon is flexibly set up in places where dust may be generated to reduce dust in the return coal silo.

[0024] In practice, lump coal is transported by vehicle to the raw coal warehouse. Sensors, regulating valves, and controllers are ideally installed. Before unloading, the sensors detect the vehicle's arrival and transmit this information to the controller, which then controls the spray pipes to humidify and mist the lump coal. The humidified, dust-laden wastewater flows to a sedimentation tank. Simultaneously, this wastewater is recycled at the vehicle wheel washing machine, reducing coal dust carried out of the plant area. Multiple mist cannons are installed within the raw coal warehouse to humidify and suppress dust at unloading and transfer points, further reducing coal dust levels.

[0025] Lump coal is fed, crushed, and screened by feeders, crushers, and screening equipment. The dust generated during the process is collected by bag filters. Conveying equipment, such as belt conveyors, has enclosed material guiding sections and is equipped with dry fog dust suppression nozzles to reduce dust overflow.

[0026] Dust discharged from the baghouse dust collector, flue ash from the gasification section, and pulverized coal returned during the transportation of lump coal are transported to the return coal silo by a scraper conveyor. Before entering the silo, the coal is mixed by a humidifying mixer. Multiple nozzles are installed inside the mixer, and the water volume is adjusted according to the size of the material coming from the scraper conveyor to control dust in the return coal. A mist cannon is used to suppress dust generated during the transfer of the mixed material. Through these operations, the on-site working environment meets the requirements.

[0027] The above embodiments describe preferred embodiments of the present invention, but the present invention is not limited thereto. Within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solution of the present invention, including combining the various technical features in any other way. These simple modifications and combinations should also be considered as the content disclosed by the present invention and all fall within the protection scope of the present invention. Therefore, the protection scope of the present invention patent should be determined by the appended claims.

Claims

1. A dust removal and environmental protection device for conveying raw materials for lump coal gasification, characterized in that: The system includes a vehicle entry / exit area along the direction of raw material movement, a raw coal warehouse, feeding equipment, crushing equipment, and screening equipment. It also includes conveying equipment connecting the raw coal warehouse to each stage of the gasification process. The vehicle entry / exit area is divided into a vehicle entry area and a vehicle exit area. The vehicle entry area is equipped with a spray pipe above it and a water collection channel below it. The vehicle exit area is equipped with a vehicle wheel washing machine below it. The water collection channel and the drainage channel of the vehicle wheel washing machine are connected to a sewage sedimentation tank. The sewage sedimentation tank is connected to the spray pipe and the water inlet of the vehicle wheel washing machine above it via pumps and pipes. Fog cannons are installed at the unloading point, transfer point, and exit point of the raw coal warehouse. Bag dust collectors are connected above the feeding equipment, crushing equipment, and screening equipment. Dry fog dust suppression devices are installed above the conveying equipment.

2. The dust removal and environmental protection device for conveying raw materials for lump coal gasification according to claim 1, characterized in that: The wastewater sedimentation tank is an inclined plate sedimentation tank, with the angle between the inclined plate and the horizontal plane being 60°.

3. The dust removal and environmental protection device for conveying raw materials for lump coal gasification according to claim 1, characterized in that: The wastewater sedimentation tank is equipped with a bar screen at its outlet.

4. The dust removal and environmental protection device for conveying raw materials for lump coal gasification according to claim 1, characterized in that: Dust collection hoods are installed above the feeding equipment, crushing equipment, and screening equipment, and the dust collection hoods are connected to the bag filter dust collector through pipes and pumps.

5. The dust removal and environmental protection device for conveying raw materials for lump coal gasification according to any one of claims 1 to 4, characterized in that: The coal gasification raw material conveying and dust removal environmental protection device also includes a return coal storage silo. Screening equipment, bag dust collectors, and flue dust from the gasification section are transported to the return coal storage silo via a buried scraper conveyor.

6. The dust removal and environmental protection device for conveying raw materials for lump coal gasification according to claim 5, characterized in that: A humidifying mixer is also installed between the buried scraper conveyor and the return coal storage, and multiple sets of nozzles are installed inside the mixer.

7. The dust removal and environmental protection device for conveying raw materials for lump coal gasification according to claim 6, characterized in that: A mist cannon is also installed at the unloading point of the humidifying mixer in the return coal storage area.

Images