High-temperature flame-retardant bag-type dust collector

Abstract

The utility model provides a high-temperature flame-retardant bag-type dust collector and relates to the technical field of dust collectors. The dust removal device comprises a bottom frame, a dust hopper, a dust removal box and a sucking pump which are sequentially arranged from bottom to top, the upper portion of the dust hopper is communicated with the interior of the dust removal box, and the upper portion of the dust removal box is communicated with the sucking pump through a pipeline; the lower part of the dust removal box is provided with a dust gas chamber; the upper part of the dust removal box is provided with a gas purification chamber; a filter bag cage is inserted into the pore plate; a filter bag is sleeved outside the filter bag cage and extends into the dust gas chamber; the spraying pipe extends from top to bottom, and a plurality of groups of outward spraying holes are formed in the spraying pipe at intervals from top to bottom; an air inlet is formed in the side surface of the ash bucket; an ash outlet is formed in the bottom of the ash bucket; the dust remover disclosed by the utility model can cope with the condition that the smoke temperature is too high for a long time, and the abnormity of high temperature of the gas can be eliminated for a long time.

Description

Technical Field

[0001] The utility model relates to the technical field of dust collectors, and particularly relates to a high-temperature flame-retardant bag dust collector. Background Art

[0002] Bag dust collectors have high dust removal efficiency, small occupied area, and simple maintenance and repair, and are widely used in various industries. When dealing with high-temperature gases, bag dust collectors need to select filter bags made of materials such as fiberglass and polyamide that are resistant to high temperature, corrosion, and low water absorption. And when the temperature is higher than the safe operating temperature of the filter bag, pre-cooling treatment is required.

[0003] Since fiberglass filter bags are mainly made of inorganic materials, they have high tolerance to dust gases with high humidity. Most of the currently used high-temperature bag dust collectors use this type of filter bag. However, the existing bag dust collectors used under high-temperature conditions generally have strict requirements for the operating temperature, with a low safe operating temperature and are prone to accidental bag clogging. Summary of the Utility Model

[0004] Therefore, in view of the above problems existing in the prior art, the utility model provides a high-temperature flame-retardant bag dust collector to effectively reduce or even avoid the situation of bag clogging.

[0005] The technical solution of the utility model is as follows:

[0006] A high-temperature flame-retardant bag dust collector includes a chassis, a hopper, a dust removal box, and an air extraction pump. The chassis, hopper, and dust removal box are arranged in sequence from bottom to top. The upper part of the hopper is communicated with the inside of the dust removal box, and the upper part of the dust removal box is communicated with the air extraction pump through a pipeline.

[0007] Inside the dust removal box, an orifice plate divides the internal space of the box into upper and lower parts. The lower part of the dust removal box is a dust gas chamber for accommodating the gas to be filtered, and the upper part of the dust removal box is a clean gas chamber. A filter bag cage is inserted into the orifice plate. The filter bag cage is sleeved with a filter bag that extends into the dust gas chamber. The filter bag mouth is hermetically clamped between the orifice plate and the filter bag cage. Above the filter bag, there is a nozzle for blowing air into the filter bag. The nozzle is connected to an electric control pulse gas circuit. A spray pipe is arranged inside the filter bag cage and extends from top to bottom. Multiple groups of outward spray holes are arranged at intervals along the spray pipe from top to bottom.

[0008] An air inlet is opened on the side of the hopper, and an ash discharge port is opened at the bottom of the hopper.

[0009] Preferably, the electric control pulse gas circuit includes an electromagnetic pulse valve, a gas storage tank, a compressor, and a controller. The gas storage tank is connected to the compressor and the electromagnetic pulse valve through air pipes respectively. The electromagnetic pulse valve is connected to the nozzle through an air pipe, and the electromagnetic pulse valve is electrically connected to the controller.

[0010] As an optimization, the high-temperature flame-retardant bag dust collector further includes a ladder disposed on the side and a maintenance platform disposed outside the top of the dust removal box, and the top cover of the dust removal box is a detachable structure.

[0011] As an optimization, a maintenance hole is formed in the side of the ash hopper, and a multi-lobe rotary valve is disposed in the ash discharge port.

[0012] As an optimization, two plate valves are connected in series in the ash discharge port.

[0013] The working principle and beneficial effects of the present invention are as follows:

[0014] For the high-temperature flame-retardant bag dust collector provided by the present invention, when the temperature is higher than the preset temperature, the spray pipe sprays mist into the filter bag, and the evaporation of the mist takes away heat to reduce the temperature of the filter bag. The spray pipe can also spray low-temperature gas instead of mist to avoid the influence of humidity. The present invention can cope with the extreme situation where the dust gas is higher than the safe use temperature for a long time, so as to gain time for troubleshooting the system, and the maintenance and support personnel can handle the fault causing the high temperature of the dust gas calmly, thereby ensuring the continuous operation of the entire dust removal system. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The present invention will be further described in detail below with reference to the drawings and specific embodiments.

[0016] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0017] Figure 2 is a schematic diagram of the structure of the dust removal box;

[0018] Figure 3 is Figure 2 a partial enlarged view of part A in

[0019] Figure 4 is Figure 2 a partial enlarged view of part B in

[0020] In the figure: 1. Dust removal box; 11. Orifice plate; 12. Venturi tube; 13. Filter bag cage; 14. Spray pipe; 15. Air nozzle; 2. Ash hopper; 21. Air inlet; 22. Ash discharge port; 3. Pipeline; 4. Exhaust pump; 5. Underframe. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the scope of the present invention.

[0022] This embodiment provides a high-temperature flame-retardant bag filter, which includes a chassis 5, an ash hopper 2, a dust removal box 1, and an air extraction pump 4. The chassis 5, the ash hopper 2, and the dust removal box 1 are arranged in sequence from bottom to top. The upper part of the ash hopper 2 is communicated with the inside of the dust removal box 1, and the upper part of the dust removal box 1 is communicated with the air extraction pump 4 through a pipeline 3.

[0023] Inside the dust removal box 1, an orifice plate 11 is provided to divide the internal space of the box into upper and lower parts. The lower part of the dust removal box 1 is a dust gas chamber for accommodating the gas to be filtered, and the upper part of the dust removal box 1 is a clean gas chamber. A filter bag cage 13 is inserted into the orifice plate 11. The filter bag cage 13 is sleeved with a filter bag and extends into the dust gas chamber. The filter bag mouth is hermetically clamped between the orifice plate 11 and the filter bag cage 13. Above the filter bag, there is an air nozzle 15 for blowing air into the filter bag. A venturi tube 12 is provided between the air nozzle 15 and the filter bag cage 13. The air nozzle 15 is connected to an electric control pulse gas circuit. The electric control pulse gas circuit includes an electromagnetic pulse valve, a gas storage tank, a compressor, and a controller. The gas storage tank is connected to the compressor and the electromagnetic pulse valve through air pipes respectively. The electromagnetic pulse valve is connected to the air nozzle through an air pipe, and the electromagnetic pulse valve is electrically connected to the controller. A spray pipe 14 is arranged inside the filter bag cage 13. The spray pipe 14 extends from top to bottom, and multiple groups of outward spray holes are arranged at intervals from top to bottom on the spray pipe 14.

[0024] An air inlet 21 and a maintenance hole are opened on the side of the ash hopper 2. A dust discharge port 22 is opened at the bottom of the ash hopper 2. While keeping the dust discharge port airtight, there are two preferred implementation methods for dust discharge. One is to set a multi-lobe rotary valve inside the dust discharge port 22, and the multi-lobe rotary valve rotates to discharge dust. The other is to serially arrange two plate valves inside the dust discharge port 22, and the two plate valves are opened and closed in sequence to achieve dust discharge. When discharging dust, first open the upper plate valve, and the powder ash falls into the space between the two plate valves. Then close the upper plate valve, and then open the lower plate valve to discharge the powder ash. The utility model also includes a ladder arranged on the side and a maintenance platform arranged outside the top of the dust removal box 1. The top cover of the dust removal box 1 is a detachable structure.

[0025] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included in the protection scope of the present utility model.

Claims

1. A high temperature flame retardant bag filter, characterized in that: It includes a base frame, an ash hopper, a dust removal box and an air pump, wherein the base frame, the ash hopper and the dust removal box are arranged in sequence from bottom to top, the upper part of the ash hopper is connected to the inside of the dust removal box, and the upper part of the dust removal box is connected to the air pump through a pipeline; A perforated plate is provided inside the dust box to divide the internal space of the box into two parts, the lower part of the dust box is a dust and gas chamber for accommodating the gas to be filtered, and the upper part of the dust box is a clean air chamber. A filter bag cage is inserted into the perforated plate, and the filter bag cage outer jacket extends into the dust and gas chamber. The filter bag opening is airtightly embedded between the perforated plate and the filter bag cage. An air nozzle for blowing air into the filter bag is provided above the filter bag, and the air nozzle is connected to an electrically controlled pulse air circuit. A spray pipe is provided in the filter bag cage, and the spray pipe extends from top to bottom. The spray pipe is provided with multiple groups of outward spray holes at intervals from top to bottom. An air inlet is provided on the side of the ash hopper, and an ash discharge port is provided at the bottom of the ash hopper.

2. The high temperature flame retardant bag filter according to claim 1, characterized in that: The electrically controlled pulse gas circuit includes an electromagnetic pulse valve, an air storage tank, an air compressor and a controller. The air storage tank is connected to the air compressor and the electromagnetic pulse valve through air pipes, respectively. The electromagnetic pulse valve is connected to the air nozzle through an air pipe, and the electromagnetic pulse valve is electrically connected to the controller.

3. The high temperature flame retardant bag filter according to claim 2, characterized in that: The high-temperature flame-retardant bag filter also includes a ladder arranged on the side and a maintenance platform arranged on the outside of the top of the dust removal box. The top cover of the dust removal box is a detachable structure.

4. The high temperature flame retardant bag filter according to claim 3, characterized in that: An inspection hole is provided on the side of the ash hopper, and a multi-petal rotary valve is arranged in the ash discharge port.

5. The high temperature flame retardant bag filter according to claim 2, characterized in that: Two plate valves are arranged in series in the ash discharge port.

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