Detachable gasified flue gas dry purification device

Abstract

The utility model discloses a detachable gasified flue gas dry purification device which comprises a main flue, a flue bypass, a lime powder box, an activated carbon box, a flue butterfly valve, a bypass butterfly valve and a check valve, the gas inlet end of the flue bypass is connected with a first connecting point of the main flue, and the gas outlet end of the flue bypass is connected with a second connecting point of the main flue; the first connecting point is located in front of the second connecting point, the flue butterfly valve, the lime powder box, the activated carbon box and the check valve are sequentially arranged on the main flue in the direction from the first connecting point to the second connecting point, the lime powder box and the activated carbon box are detachably arranged in the main flue at intervals, and a bypass butterfly valve is arranged at the air inlet end of the flue bypass. Through switching of the main flue and the bypass, efficient disassembly and assembly of the flue gas dry-process purification device are achieved, the flue gas dry-process purification device is simple in structure, low in manufacturing cost, small in occupied area, convenient to maintain, safe and reliable, and the influence on system operation is reduced.

Description

Technical Field

[0001] This application relates to the field of dry flue gas purification technology, specifically to a detachable dry gasification flue gas purification device. Background Technology

[0002] Biomass energy, as a renewable energy source, plays an increasingly important role in reducing dependence on fossil fuels and lowering greenhouse gas emissions. Gasification flue gas, as the outlet gas from a biomass gasifier, plays a crucial role in current environmental protection efforts, particularly in the treatment of biomass solid waste.

[0003] Biomass gasification furnaces are environmental protection equipment mainly used in the treatment of biomass solid waste such as agricultural waste, garden waste, and domestic waste. The process is mainly achieved through pyrolysis gasification reaction at high temperature. In this process, it effectively reduces the volume of biomass solid waste, transforming the biomass solid waste that was originally piled up in large quantities and may have caused environmental pollution into gasified flue gas and ash.

[0004] However, the flue gas generated during gasification typically contains various harmful substances, such as acidic gases, heavy metals, and persistent organic pollutants like dioxins. To ensure these emissions meet stringent environmental standards, effective purification is essential. Currently, the mainstream dry purification technologies for gasification flue gas on the market mainly include deacidifying agent injection systems and activated carbon adsorption systems. While these two methods can remove pollutants from the flue gas to some extent, they also have significant limitations: the equipment is complex, costly, requires a large footprint, and maintenance disrupts system operation and consumes a lot of energy. Utility Model Content

[0005] Therefore, this application provides a detachable dry purification device for gasified flue gas to solve the above-mentioned problems existing in the prior art.

[0006] To achieve the above objectives, this application provides the following technical solution:

[0007] A detachable dry purification device for gasified flue gas includes a main flue, a flue bypass, a lime powder box, an activated carbon box, a flue butterfly valve, a bypass butterfly valve, and a check valve.

[0008] The main flue is provided with a first connection point and a second connection point at intervals, wherein the first connection point is before the second connection point;

[0009] The air inlet of the flue bypass is connected to the first connection point, and the air outlet of the flue bypass is connected to the second connection point.

[0010] The intake end of the flue bypass is connected to the first connection point of the main flue, and the outlet end of the flue bypass is connected to the second connection point of the main flue. The first connection point is before the second connection point.

[0011] The flue butterfly valve, lime powder box, activated carbon box, and check valve are arranged sequentially on the main flue from the first connection point to the second connection point. The lime powder box and activated carbon box are detachably and spaced apart in the main flue.

[0012] A bypass butterfly valve is installed at the air inlet end of the flue bypass.

[0013] Furthermore, the main flue has a square cross-section.

[0014] Furthermore, the lime powder box contains lime powder, and the activated carbon box contains activated carbon.

[0015] Furthermore, both the lime powder box and the activated carbon box are square in shape.

[0016] Furthermore, an inspection door is installed on the main flue, located above the lime powder box and activated carbon box.

[0017] Furthermore, the bypass butterfly valve and the flue butterfly valve are controlled alternately.

[0018] Furthermore, a bypass check valve is installed at the outlet of the flue bypass.

[0019] Furthermore, the bypass flue is parallel to and at the same height as the main flue.

[0020] Furthermore, it also includes a bag filter, which is connected to the outlet of the main flue.

[0021] Compared with the prior art, this application has at least the following beneficial effects:

[0022] 1. This device places the lime powder box and activated carbon box inside the main flue. Compared with the existing complex decentralized structure of deacidification agent injection system and activated carbon injection system, it reduces the external connecting pipes and auxiliary structures, making the overall structure more compact, thereby reducing the complexity of the device. It can also reduce the amount of raw materials used in the manufacturing process and reduce manufacturing costs.

[0023] 2. By switching the flue bypass, the flue gas can continue to flow to the bag filter through the flue bypass, avoiding the interruption of the entire system operation, greatly improving the operational stability of the biomass gasifier and the entire treatment system, and reducing the environmental impact of untreated flue gas emissions caused by maintenance. Attached Figure Description

[0024] To more intuitively illustrate the prior art and this application, exemplary drawings are provided below. It should be understood that the specific shapes and structures shown in the drawings should not generally be regarded as limiting conditions for implementing this application; for example, based on the technical concept disclosed in this application and the exemplary drawings, those skilled in the art are able to easily make conventional adjustments or further optimizations to the addition / reduction / classification, specific shapes, positional relationships, connection methods, size ratios, etc. of certain units (components).

[0025] Figure 1 This is a top view of a detachable dry gasification purification device for an embodiment of this application.

[0026] Figure 2 This is a cross-sectional structural schematic diagram of a detachable dry purification device for gasified flue gas provided in an embodiment of this application.

[0027] Explanation of reference numerals in the attached figures:

[0028] 1. Main flue; 2. Flue butterfly valve; 3. Lime powder box; 4. Activated carbon box; 5. Check valve; 6. Bypass butterfly valve; 7. Flue bypass; 8. Bypass check valve; 9. Inspection door; 10. Bag filter. Detailed Implementation

[0029] The present application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0030] Example 1

[0031] like Figures 1-2 As shown, a detachable dry gasification purification device for flue gas includes a main flue 1, a flue bypass 7, a lime powder box 3, an activated carbon box 4, a flue butterfly valve 2, a bypass butterfly valve 6, and a check valve 5. The main flue 1 has a first connection point and a second connection point spaced apart, with the first connection point preceding the second connection point. The directional term "preceding" refers to the upstream direction of the flue gas flow. The inlet of the bypass 7 is connected to the first connection point of the main flue 1, and the outlet of the bypass 7 is connected to the second connection point of the main flue 1. Point connection; the flue butterfly valve 2, lime powder box 3, activated carbon box 4, and check valve 5 are sequentially arranged on the main flue 1 from the first connection point to the second connection point. Among them, the lime powder box 3 is a gas filter with lime powder inside, mainly used to neutralize acidic gases, and the activated carbon box 4 is a gas filter with activated carbon inside, mainly used for adsorption. The lime powder box 3 and the activated carbon box 4 are detachably and spaced apart in the main flue 1; the inlet end of the flue bypass 7 is equipped with a bypass butterfly valve 6.

[0032] In this embodiment, flue gas flows through the main flue 1, which has a square cross-section. The lime powder box 3 and the activated carbon box 4 are also square, which facilitates the disassembly and assembly of the reagent boxes. When it is necessary to replenish lime powder or replace activated carbon, the staff can more easily disassemble the boxes from the main flue 1 for operation, and the boxes can be more accurately connected to the main flue 1 during installation. The flue butterfly valve 2 on the main flue 1 is normally open to ensure smooth passage of flue gas. After passing through the flue butterfly valve 2, the flue gas first enters the lime powder box 3. In the lime powder box 3, acidic gases (such as sulfur dioxide) in the flue gas react chemically with lime powder (mainly calcium hydroxide), effectively removing acidic gases from the flue gas. Then, the flue gas, now free of acidic gases, enters the activated carbon box 4. In the activated carbon box 4, activated carbon adsorbs heavy metals and dioxins in the flue gas. Subsequently, the flue gas passes through the check valve 5, which prevents backflow of flue gas within the system, ensuring that the flue gas flows stably in the predetermined direction and avoiding mixing of treated and untreated flue gas. This ensures the effectiveness and reliability of the entire purification process. Finally, the flue gas, after the above treatment, flows to the bag filter 10. The bag filter 10 further filters fine particulate matter in the flue gas through its internal filter bags, enabling the flue gas discharged from the system to meet stricter environmental emission standards.

[0033] Example 2

[0034] like Figures 1-2 As shown in the figure, this embodiment provides a detachable dry purification device for gasified flue gas, the structure of which includes all the contents of Embodiment 1. Only the different parts are described below.

[0035] In this embodiment, an inspection door 9 is provided on the main flue 1. The inspection door 9 is a sealed handwheel inspection door. During operation, the inspection door 9 is sealed and closed. During maintenance, the lime powder box 3 and the activated carbon box 4 can be disassembled and installed by turning the handwheel to open the inspection door 9.

[0036] Example 3

[0037] like Figures 1-2 As shown in the figure, this embodiment provides a detachable dry purification device for gasified flue gas, the structure of which includes all the contents of Embodiment 1. Only the different parts are described below.

[0038] In this embodiment, the bypass 7 is parallel to and at the same height as the main flue 1. The bypass butterfly valve 6 and the flue butterfly valve 2 are controlled alternately. The bypass butterfly valve 6 is installed on the bypass 7. When the main flue 1 is running normally, the flue butterfly valve 2 is in the normally open state, and the bypass butterfly valve 6 is in the closed state. When it is necessary to maintain and repair a certain purification component (such as the lime powder box 3 or the activated carbon box 4) on the main flue 1, the flue butterfly valve 2 is closed and the bypass butterfly valve 6 is in the open state. All the flue gas passes through the bypass flue 7 and finally flows to the bag filter 10 for treatment through the bypass check valve 8. This allows for safe and convenient maintenance and repair of the purification components without stopping the entire production process.

[0039] The technical features of the above embodiments can be combined in any way (as long as there is no contradiction in the combination of these technical features). For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described; these embodiments not explicitly written should also be considered to be within the scope of this specification.

Claims

1. A detachable dry purification device for gasified flue gas, characterized in that, It includes the main flue (1), flue bypass (7), lime powder box (3), activated carbon box (4), flue butterfly valve (2), bypass butterfly valve (6) and check valve (5); The main flue (1) is provided with a first connection point and a second connection point at intervals, wherein the first connection point is before the second connection point; The air inlet of the flue bypass (7) is connected to the first connection point, and the air outlet of the flue bypass (7) is connected to the second connection point. The flue butterfly valve (2), lime powder box (3), activated carbon box (4), and check valve (5) are arranged sequentially on the main flue (1) from the first connection point to the second connection point. The lime powder box (3) and the activated carbon box (4) are detachably and spaced apart in the main flue (1). The bypass butterfly valve (6) is provided at the air inlet end of the flue bypass (7).

2. The detachable dry purification device for gasified flue gas according to claim 1, characterized in that, The main flue (1) has a square cross-section.

3. The detachable dry purification device for gasified flue gas according to claim 1, characterized in that, The lime powder box (3) contains lime powder, and the activated carbon box (4) contains activated carbon.

4. The detachable dry purification device for gasified flue gas according to claim 1, characterized in that, Both the lime powder box (3) and the activated carbon box (4) are square.

5. The detachable dry purification device for gasified flue gas according to claim 1, characterized in that, The main flue (1) is equipped with an inspection door (9), which is located above the lime powder box (3) and the activated carbon box (4).

6. The detachable dry purification device for gasified flue gas according to claim 1, characterized in that, The bypass butterfly valve (6) and the flue butterfly valve (2) are controlled alternately.

7. The detachable dry purification device for gasified flue gas according to claim 1, characterized in that, The outlet end of the flue bypass (7) is equipped with a bypass check valve (8).

8. The detachable dry purification device for gasified flue gas according to claim 1, characterized in that, The bypass (7) is parallel to and at the same height as the main flue (1).

9. The detachable dry purification device for gasified flue gas according to claim 1, characterized in that, It also includes a bag filter (10), which is connected to the outlet end of the main flue (1).

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