CN202638181U - Inner-filtering type dust filter device - Google Patents

Abstract

The utility model relates to a dedusting device, and discloses an inner-filtering type dust filter device. The inner-filtering type dust filter device comprises a box body, a wind inlet, a wind outlet, filtering fixed bases, filter devices fixed on the filtering fixed bases, a blowing system arranged above the filter devices, and a dust storage box arranged under the box body. The inner-filtering type dust filter device is characterized in that the blowing system comprises an air resource device and a blowing pipeline, and an air current is faced to a filter device hole from top to bottom through the blowing pipeline from the air resource device. The inner-filtering type dust filter device has the advantages of being simple in structure, economic in cost, high in filtering speed, good in effect of dust cleaning, high in purification efficiency, large in amount of processed gas, long in service life of the filter device, safe and reliable in operation, and high in automation degree.

Description

Inner filter dust filter equipment

technical field

The utility model relates to a dust removal device, in particular to an inner filter type dust filter device for purifying dusty flue gas with a large air volume in the field of environmental protection.

Background technique

With the development of industrial production and the improvement of people's awareness of environmental protection, various dust removal technologies have been developed by people, and various dust removal equipments have emerged as the times require.

The performance of dust removal equipment is mainly manifested in two aspects: filtration and dust removal. With the current level of dust removal technology, it is not difficult to make the filtration effect meet or exceed the environmental protection standard, but it is relatively difficult to control the dust removal resistance of the dust removal equipment within the predetermined limit. Looking at the problems of poor operation effect in the dust removal system of existing dust removal equipment, most of them are related to the increase of resistance caused by poor dust removal effect, so "dust removal" is a decisive factor related to the success or failure of the dust removal system. As the working conditions continue, the dust accumulated on the filter surface of the dust removal equipment will accumulate more and more, which will increase the operating resistance of the equipment accordingly. In order to ensure the normal operation of the system, the resistance of the dust removal equipment should be maintained within a certain range, and dust removal should be performed if it exceeds this limited range. The quality of the dust removal effect is related to various indicators such as the resistance, efficiency, service life of the filter material and the operating economic benefits of the dust removal equipment.

According to the latest national standard, the basic requirement for dust removal of the dust collector is to quickly and evenly peel off the deposited dust from the filter, while maintaining a certain primary dust layer, without damaging the filter and consuming less power. At present, the commonly used dust removal equipment mainly includes mechanical vibrating dust removal bag type dust collector, reverse blowing bag type dust collector, pulse jet bag type dust collector. The mechanical vibrating dust cleaning bag filter has a simple structure and reliable operation, but the dust removal effect is uneven, and only a low filtration wind speed is allowed, and the dust removal is often easy to damage the filter and destroy the primary dust layer. The airflow distribution of the reverse air bag filter is relatively uniform, the vibration is not violent, and the damage to the filter is small, but the cleaning effect is weak, and the allowable filtering wind speed is low. Pulse jet bag filter is a high-efficiency dust removal and purification equipment, which has the advantages of good dust removal effect, high purification efficiency, large processing gas volume, long filter life, small maintenance workload, safe and reliable operation, and high degree of automation. Due to the many advantages above, the pulse jet bag filter is currently the most common and efficient filter dust collector in the world. However, the pulse-jet bag filter in the prior art all needs to be provided with a matching bag cage for the filter, and the bag cage needs regular maintenance and replacement, which is inconvenient to use and high in cost.

Utility model content

The utility model provides an inner filter type dust filter equipment, which is used for separating particles from dust-containing gas and collecting and recycling them, so as to achieve good dust cleaning effect, high purification efficiency, large processing gas volume and long filter life. , small maintenance workload, safe and reliable automatic dust removal.

The above-mentioned technical problems of the utility model are mainly solved by the following technical solutions:

An inner filter type dust filter equipment, comprising:

Box for support and protection;

Air inlets and outlets for the introduction of dusty air and the discharge of clean air;

Filter holder for fixing the filter;

Filters for trapping solid particles in gases;

A clean air chamber arranged above the filter;

The ash storage box arranged under the box body is used to receive the dust collected by the dust collector;

It also includes a blowing system for cleaning the deposited dust in the filter; the blowing system includes a gas source device and a blowing pipeline; the air flow is blown from the gas source device into the filter from top to bottom through the blowing pipeline.

Further, the dust-laden gas passes through the air inlet into the filter, and the filter attaches the dust in the dust-laden gas to its inner surface.

The dust-laden gas enters the filter equipment through the air inlet and enters the filter. The filter filters the dust on its inner surface, and the clean gas passes through the filter and is discharged from the air outlet. Through the blowing pipe, the filter is directly blown from top to bottom, and the dust attached to the inner wall of the filter is blown into the ash storage box, so that the dust filtration and dust removal are realized.

Further, the internal filter type dust filter equipment also includes several poppet valves, which are arranged in the pipeline connected to the air outlet, and are used to switch the dust removal and dust cleaning modes of the dust removal equipment.

The poppet valve corresponds to one or more sets of filters according to the needs of practical applications, and controls the air pressure inside the box. When the poppet valve is opened, the dusty gas passing into the filter is filtered from the filter to the outside, and passes through the poppet valve. It is discharged through the air outlet; when the poppet valve is closed, the filtered gas cannot be discharged, and the dust removal mode is switched.

Further, the filter fixing seat is fixed on the lower flower plate. The lower flower plate is located in the box body, and the lower flower plate directly bears loads such as the weight of the filter and its accessory parts, dust accumulation on the panel, dust sticking on the inner surface of the filter, and blowing air pressure.

Further, the end of the blowing pipeline communicates with the clean air chamber. The end of the injection pipeline is connected to the clean air chamber, so that the airflow of the air source device can pass through the injection pipeline to the clean air chamber, and then pass through the clean air chamber into the interior of the filter for dust removal.

Further, the injection system further includes several pulse valves, one end of which is connected to the air source device, and the other end is connected to the injection pipeline. Set the air injection pipeline above the filter, adopt the direct injection method, impact the filter from top to bottom, set the pulse air pressure through the pulse valve, and flush the dust on the inner wall of the filter into the ash storage box, so as to achieve the efficiency of dust removal effect.

The pulse valves are connected in parallel in the blowing system, and each pulse valve corresponds to a group of filters. Large-scale dust removal equipment often has dozens of filters, and the running resistance of each filter is different during use. Multiple pulse valves are connected in parallel in the injection system, respectively connected to the air source device and the injection pipeline, so that each pulse valve can be opened independently to realize independent dust removal of some filters; it can also be opened at the same time for synchronous dust removal.

Further, it also includes a bypass system connecting the air inlet and the air outlet, which is used to discharge the gas with too high or too low temperature and protect the filter.

Further, a bypass valve is provided in the bypass system, and the bypass valve is opened when the temperature of the dusty gas is lower or higher than the tolerance range of the filter.

The bypass system is provided with a bypass valve, which is opened when the temperature of the dusty gas is lower or higher than the tolerance range of the filter. The temperature of the flue gas processed by the dust removal equipment changes during use. When the temperature of the flue gas is lower than the dew point temperature, it will cause the filter of the dust removal equipment to stick to the bag; when the temperature of the flue gas is higher than the temperature of the dust removal equipment When the filter is used at the highest temperature, it will cause the filter of the dust removal equipment to burn out; in addition, when the boiler bursts or refuels for combustion, the filter of the dust removal equipment will burn out. The occurrence of these phenomena will cause the dust removal equipment to fail to operate normally and affect the service life of the filter. Therefore, the filter can be protected and the service life of the filter can be extended by adding a bypass flue and a bypass valve to the dust removal equipment.

Further, the internal filter type dust filter equipment also includes an electrical control system, the electrical control system is controlled by a programmable controller, and each part of the dust collector can be automatically or manually controlled according to requirements, and can also be set according to requirements. linkage.

Further, the inner filter type dust filter equipment also includes a constant temperature control system.

As can be seen from the above technical solutions, the utility model embodiment has the following advantages:

1. Simple structure, cost saving, easy maintenance and installation;

2. The vibration is not violent, it will not damage the filter, and at the same time maintain the integrity of the primary dust layer;

3. High filtration wind speed, good dust removal effect, high purification efficiency, large processing gas volume, safe and reliable operation, and high degree of automation.

Description of drawings

Fig. 1 is a schematic diagram of the overall structure of the utility model embodiment;

Fig. 2 is a schematic structural diagram of the injection system of the utility model embodiment;

Fig. 3 is a schematic diagram of a cross-sectional structure of an embodiment of the utility model;

Fig. 4 is the dust removal and ash-cleaning flowchart of the utility model embodiment;

Among them: 1-box, 2-air inlet, 3-air outlet, 4-ash storage box, 5-filter fixing seat, 6-filter, 7-lower flower plate, 8-injection pipeline, 9-air source Device, 10-purge chamber, 11-pulse valve, 12-poppet valve, 13-bypass valve.

Detailed ways

The embodiment of the utility model provides an inner filter type dust filter device, which is used to separate, collect and recycle particulate matter from dust-containing gas. The implementation process of the utility model will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

An internal filter type dust filter equipment, used to separate and recycle particulate matter from dust-laden gas through a filter, as shown in Figure 1, including: a box body 1 for support and protection; The air inlet 2 on one side of the body 1 and the air outlet 3 on the opposite side are respectively used for passing in dusty gas and discharging clean gas. The air inlet 2 controls the filtering wind speed below 1.4m/min. The ash storage box 4 is arranged under the box body 1 for receiving the dust collected by the dust collector, and a column is also arranged under the ash storage box 4 to play a supporting role.

The filter holder 5 is fixed on the lower flower plate 7 . The lower flower plate is located in the box body, and directly bears loads such as the weight of the filter 6 and its accessory parts, dust accumulation on the panel, sticky dust on the inner surface of the filter 6, and blowing air pressure.

The filter 6 in the present embodiment adopts a bag filter, and is provided with 96 filter bags adopting PPS material in total, and the filter 6 is fixed on the filter holder 5 through fittings such as a Venturi tube and a pocket elastic ring. Suspended below the injection system. The filter 6 is used to trap solid particles in the gas. The filter material of the filter 6 is the key material of the dust removal equipment, and the selection of a suitable filter material according to the properties of the gas and dust to be treated has an important impact on the normal operation and operation effect of the dust removal equipment. In practical applications, it is necessary to consider factors such as gas temperature, humidity, dust particle size, gas chemical properties, gas-to-cloth ratio, and particle wear to select a suitable filter material. In addition to the PPS material, the bag filter can also be made of polyester, glass fiber and other materials.

The injection system in this embodiment includes an air source device 9 for providing air source for the injection system, 14 injection pipelines 8 , and four electromagnetic pulse valves 11 . The blowing pipelines 8 are distributed in the net shape in the clean air chamber 10 , that is, above the filter 6 , for cleaning the dust deposited in the filter 6 . The compressed air requirement of the air source device 9 is 0.5-0.7 MPa. The four pulse valves 11 are connected in parallel in the blowing system, one end is connected with the gas source device 9, and the other end is connected with the blowing pipeline 8; each pulse valve 11 is connected with three blowing pipelines 8 to control the three blowing pipelines. 24 injection holes on the injection pipeline 8 are responsible for the deashing work of a group of 24 filters 6 corresponding. The airflow flows out from the air source device 9, applies a pulse force to it through the pulse valve 11, and then enters the injection pipeline 8, and then pulses into the filter 6 through the injection pipeline 8 from top to bottom for dust removal.

Large-scale dust removal equipment often has tens or hundreds of filters 6. During use, the running resistance of each filter 6 is different. Multiple pulse valves 11 are connected in parallel in the blowing system, respectively connected to the air source device 9 and Injection pipeline 8, so that each pulse valve 11 can be opened separately to realize independent dust removal of some filters 6; it can also be opened at the same time for synchronous dust removal.

The dust removal system is the core technology of the dust removal equipment. The dust removal system of the dust removal equipment commonly used at present is either easy to damage the filter 6 and cannot meet the national standard; or it must be equipped with a bag cage, which is costly and complicated to maintain. In the utility model, the dust-laden gas enters the box body 1 through the air inlet 2, and is filtered by the filter 6, and the dust is left on the inner surface of the filter 6, and the purified gas is directly discharged into the atmosphere through the air outlet 3; The air source device 9 is connected to the blowing pipeline 8 above the filter 6, and directly sprays the inside of the filter 6 from top to bottom, and the dust on the inner wall of the filter 6 is washed into the ash storage box 4 by pulse air pressure. This achieves the effect of cleaning dust.

The inner filter type dust filtering equipment also includes four poppet valves 12 corresponding to the pulse valve 11, the poppet valves 12 are arranged in the pipeline connected to the air outlet 3, and are used to switch the dust removal and dust removal modes of the dust collector . The poppet valve 12 controls the air pressure inside the box body 1. When the poppet valve 12 is opened, the dust-containing gas passing into the filter 6 is filtered from the inside of the filter 6, passes through the poppet valve 12, and is discharged through the air outlet 3; close the poppet valve At 12 o'clock, the filtered gas cannot be discharged, and the dust removal mode is switched. The opening or closing of the poppet valve 12 can cause the air pressure in the box 1 to change, causing the filter 6 to vibrate under the force change, and the dust on the inner wall of the filter 6 is loosened, and then it is easier to be removed by pulse jetting. The poppet valve 12 can also be set to correspond to a plurality of pulse valves 11 as required.

The bypass system is connected to the air inlet 2 and the air outlet 3 respectively, and the opening or closing of the bypass valve 13 is controlled to discharge the gas with too high or too low temperature and protect the filter 6 . When the temperature of the dusty gas is lower or higher than the tolerance range of the filter 6, the bypass valve 13 is opened. The temperature of the flue gas processed by the dust removal equipment changes during use. When the temperature of the flue gas is lower than the dew point temperature, it will cause the filter 6 of the dust removal equipment to stick to the bag; when the temperature of the flue gas is higher than the temperature of the dust removal equipment When the filter 6 is used at the highest temperature, it will cause the filter 6 of the bag filter to burn bags; in addition, when the boiler bursts or refuels to support combustion, the filter 6 of the dust removal equipment will have a bag phenomenon. The generation of these phenomena all can cause the dedusting equipment to fail to operate normally, and affect the service life of filter 6. Therefore, the filter 6 can be protected and the service life of the filter 6 can be prolonged by adding a bypass flue and a bypass valve 13 to the dust removal equipment.

The internal filter type dust filtering equipment also includes an electrical control system, which is controlled by a programmable controller, and the resistance of the dust collector equipment is set to be less than 1500Pa to realize automatic control. Each part of the dust collector can be automatically or manually controlled according to requirements, and linkage can also be set according to requirements.

The inner filter type dust filter equipment also includes a constant temperature control system. The constant temperature control system can adopt different cooling control methods according to the needs of the use environment.

The above is a detailed introduction to the embodiment of a kind of inner filter type dust filtering equipment provided by the utility model. For those of ordinary skill in the art, according to the idea of the utility model embodiment, both the specific implementation method and the scope of application will be familiar. There are changes, such as the number and corresponding relationship of filters, pulse valves, poppet valves, and the selection of air source devices, which can be changed according to actual needs. To sum up, the contents of this specification should not be understood as limiting the utility model.

Claims (10)

1. inward flow filtration-type dust-filtering equipment comprises:

The casing (1) that is used for support and protective effect;

The air inlet (2) and the air outlet (3) that are used for passing into dusty gas and discharge clean gas;

The filtration holder (5) that is used for Fixed-Filter (6);

The filter (6) that is used for the solids of captured gas;

Be arranged on the air-purifying chamber (10) of filter (6) top;

Be arranged on the ash storage box (4) of casing (1) below, be used for receiving the dust that deduster captures;

It is characterized in that: also comprise injection system, be used for the deposition dust in the cleaning and filtering (6); Described injection system comprises compressed air source unit (9) and winding-up pipeline (8); Air-flow from top to bottom blows in the filter (6) by winding-up pipeline (8) from compressed air source unit (9).

2. inward flow filtration-type dust-filtering equipment according to claim 1, it is characterized in that: dusty gas passes into filter (6) by air inlet (2), and described filter (6) is attached to the dust in the dusty gas on its inner surface.

3. inward flow filtration-type dust-filtering equipment according to claim 1, it is characterized in that: described inward flow filtration-type dust-filtering equipment also comprises some lift valves (12), described lift valve (12) is arranged in the pipeline that connects air outlet (3), is used for switching dedusting and the deashing pattern of cleaner.

4. inward flow filtration-type dust-filtering equipment according to claim 1, it is characterized in that: described filtration holder (5) is fixed on the lower face plate (7).

5. inward flow filtration-type dust-filtering equipment according to claim 1 is characterized in that: described winding-up pipeline (8) terminal connection air-purifying chamber (10).

6. inward flow filtration-type dust-filtering equipment according to claim 1, it is characterized in that: described injection system also comprises some pulse valves (11), described pulse valve (11) one ends link to each other with compressed air source unit (9), and the other end joins with winding-up pipeline (8).

7. inward flow filtration-type dust-filtering equipment according to claim 1 is characterized in that: also comprise the bypath system that connects air inlet (2) and air outlet (3), be used for the too high or too low gas of exhaust temperature, protection filter (6).

8. inward flow filtration-type dust-filtering equipment according to claim 7 is characterized in that: be provided with bypass valve (13) in the described bypath system, when the dusty gas temperature is below or above filter (6) tolerance range, open bypass valve (13).

9. inward flow filtration-type dust-filtering equipment according to claim 1, it is characterized in that: described inward flow filtration-type dust-filtering equipment also comprises electric control system, described electric control system adopts programmable controller to control.

10. inward flow filtration-type dust-filtering equipment according to claim 1, it is characterized in that: described inward flow filtration-type dust-filtering equipment also comprises thermostatic control system.

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