一种袋式除尘器及废气净化系统

Abstract

本实用新型属于废气净化设备技术领域，公开了一种袋式除尘器及废气净化系统。袋式除尘器包括壳体、过滤装置、清灰装置以及排灰装置。本实用新型通过脉冲阀直接喷入压缩空气，清灰动能由外部气源提供，不受系统风压限制，且滤袋内外无气流干扰，喷吹气流可完全作用于粉尘层，通过惯性力和滤袋形变实现粉尘剥离，从而避免传统反吹式的压差限制，动能更强且无气流对冲损耗，粉尘剥离效率提升，从原理上避免残留。此外，通过提升阀隔离目标滤袋，使其处于离线状态，从而使清灰喷吹时滤袋不承担过滤功能，从而消除了同步作业的相互干扰，既保护滤袋纤维结构，又避免粉尘在气流波动中穿透滤袋。

Claims

1. A baghouse filter, characterized by It includes a housing (1), a filter device (2), a dust removal device, and a dust discharge device (3), wherein: The inner cavity of the shell (1) is divided into a clean room (11) and a filter room (12) by a perforated plate (4). The clean room (11) is located in the upper part, and the filter room (12) is located in the lower part. The inlet (14) of the shell (1) is connected to the filter room (12), and the outlet (13) of the shell (1) is connected to the clean room (11). The filtration device (2) includes a filter bag (21), the top of which is fixed to the tube sheet (4), and the filter bag (21) is connected to the clean room (11) through the tube sheet (4); The dust removal device includes a lifting valve and a pulse valve. The lifting valve is used to control the connection or separation between the filter bag (21) and the clean room (11). The pulse valve is used to control the dust removal device to spray compressed air into the filter bag (21) when the filter bag (21) is separated from the clean room (11) in order to remove dust from the surface of the filter bag (21). The dust removal device (3) is installed on the housing (1) and is used to collect and discharge dust.

2. A baghouse according to claim 1, wherein The tube sheet (4) has a through mounting hole (41), and the filter device (2) also includes a cage bone supported in the filter bag (21). The cage bone has a fixing part that can be engaged with the mounting hole (41) so that the filter bag (21) and the tube sheet (4) can be detachably connected.

3. A baghouse according to claim 2, wherein An inclined baffle is provided between the inlet (14) of the housing (1) and the ash discharge device (3). The inclined baffle is installed at an inclination and its lower end extends above the inlet of the ash discharge device (3). The inclined baffle is configured to guide the gas to the ash discharge device (3) and cause coarse dust particles in the gas to fall into the ash discharge device (3) due to inertia.

4. A baghouse according to claim 3, wherein The tube sheet (4) is provided with multiple compartment partitions (5) to divide the filter chamber (12) into multiple independent dust collection chambers, each of which corresponds to at least one filter device (2).

5. A baghouse according to claim 1, wherein The dust removal device also includes a pre-coating device capable of spraying a reactive agent onto the surface of the filter bag (21). The pre-coating device is used to spray the reactive agent before the bag filter is started or stopped, so that a pre-coating layer is formed on the outer surface of the filter bag (21). The pre-coating layer is used to neutralize acidic substances in the flue gas and protect the filter bag (21).

6. A baghouse according to claim 5, wherein The filter bag (21) includes a bag body and an insulation layer. The insulation layer is applied to the surface of the bag body. The bag body is made of needle-punched felt material, and the insulation layer is made of fiber cotton material.

7. A baghouse according to claim 1, wherein The ash discharge device (3) includes an ash hopper (31) and an ash discharge valve, wherein: The ash hopper (31) is located at the bottom of the housing (1) and communicates with the filter chamber (12); The ash discharge valve is located at the discharge port of the ash hopper (31) and is configured to transport the dust in the ash hopper (31) to the outside.

8. A baghouse according to claim 7, wherein The ash removal device (3) also includes a dust anti-arching and bridging mechanism and a material level detection component, wherein: The material level detection device is installed on the inner wall of the ash hopper (31), and the material level detection device is used to monitor the dust level in the ash hopper (31); The dust arching and bridging mechanism is installed on the ash hopper (31). When the dust level detection device detects that the dust level has reached a preset threshold, the dust arching and bridging mechanism can start working to destroy the dust arching structure.

9. A baghouse according to claim 7, wherein The ash discharge device (3) also includes a heater disposed outside the ash hopper (31) to heat the ash hopper (31).

10. An exhaust gas purification system characterized by comprising: It includes a neutralization reaction tower, an activated carbon adsorption tower, and a bag filter as described in any one of claims 1-8, wherein the neutralization reaction tower, the bag filter, and the activated carbon adsorption tower are connected in sequence via pipelines; The neutralization reaction tower is used to neutralize the acidity or alkalinity of the gas output from the polluting equipment. The bag filter is used to receive the gas output from the neutralization reaction tower and remove dust from the gas. The activated carbon adsorption tower is used to receive the gas output from the bag filter, adsorb residual pollutants in the gas, and discharge the gas.

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