CN211753275U - Improved Energy Efficient Short Venturi Nozzle for Long Bag Filters - Google Patents

Abstract

An improved energy-saving short Venturi nozzle for a long bag filter, a swirling device including a guide vane (2) is installed on the inner side of the upper gas inlet of the nozzle (1) of the Venturi structure of the bag filter, the guide vane The central axis of (2) is coaxial with the nozzle (1). Improve the flow state of the blowing gas, make the air flow as stable as possible, and can penetrate deep into the bottom of the filter bag to improve the back-blowing effect of the filter bag. The cyclone flow pattern is more stable. Moreover, the cyclone can make the cleaning of the filter bag into a wave shape, which can reduce the L/D to below 1; the cyclone formed by the guide vane can increase the stable airflow rotation distance by more than 25% compared with the traditional direct current distance; increase the guide vane ratio to increase The pressure reduction caused by the throat is more than 30%, which significantly reduces the energy consumption of the nozzle.

Description

Improved Energy Efficient Short Venturi Nozzle for Long Bag Filters

technical field

The utility model relates to a structural improvement technology of innovative equipment, in particular to an improved energy-saving short Venturi nozzle for a long-bag dust collector.

Background technique

A bag filter is a dry dust filter. It is suitable for capturing fine, dry, non-fibrous dust. The filter bag is made of woven filter cloth or non-woven felt, and uses the filtering effect of fiber fabric to filter the dust-laden gas. The action settles down and falls into the ash hopper. When the gas containing finer dust passes through the filter material, the dust is blocked and the gas is purified.

The existing common bag filter Venturi nozzle, especially when the filter bag length of the filter is long, must increase the Venturi nozzle, so that the bottom of the bag can get enough cleaning pressure, improve the cleaning effect of the bottom of the bag, And protect the filter bag and prolong the service life of the filter bag. In order to achieve this purpose, the usual Venturi nozzle is used to extend the throat length of the Venturi nozzle to achieve, and this conventional method has the following disadvantages:

1) The length of the venturi throat is long, which causes the pressure drop of the backflushing gas to increase and the energy consumption to increase;

2) The length of the venturi throat increases, which means that its manufacturing cost is higher;

3) The air outlet pipe of the nozzle needs to be parabolically optimized, otherwise the air flow will easily diverge at the air outlet of the nozzle, the air flow cannot reach the bottom of the filter bag, and the top of the filter bag can be blown.

Utility model content

The purpose of this utility model is to provide an improved energy-saving short Venturi nozzle for long-bag dust collectors, to improve the flow pattern of the injected gas, to make the gas flow as stable as possible, and to penetrate deep into the bottom of the filter bag to improve the performance of the filter bag. The backflushing effect, especially the backflushing effect at the bottom of the filter bag.

The purpose of this utility model will be achieved through the following technical measures: including nozzles and guide vanes; installing a swirl device including guide vanes inside the upper gas inlet of the nozzle of the Venturi structure of the bag filter, the central axis of the guide vane Coaxial with the nozzle.

In particular, a symmetrical even number of guide vanes are installed on the swirl device.

In particular, the upper surface of the guide vane is a free-form surface in space.

In particular, the gap between the outer end of the guide vane and the inner wall of the nozzle is less than 20mm.

In particular, the swirl device is mounted on the inner wall of the nozzle by means of a fixed link passing through the central axis.

In particular, the angle of inclination of the guide vanes to the central axis of the swirling device is 35-65°.

In particular, the nozzle diameter D/nozzle height L is less than 1.

The advantages and effects of the utility model: the L/D can be reduced to less than 1; the cyclone formed by the guide vane can increase the stable airflow rotation distance by more than 25% compared with the traditional direct current distance; The pressure drop is more than 30%, which significantly reduces the energy consumption of the nozzle.

Description of drawings

1 is a schematic structural diagram of Embodiment 1 of the present invention.

FIG. 2 is a schematic structural diagram of a guide vane in Embodiment 1 of the present invention.

Reference numerals include:

Nozzle 1, guide vane 2, nozzle diameter D, nozzle height L.

Detailed ways

The principle of the utility model is that a guide vane 2 is added at the gas inlet of the nozzle 1. After the injected gas enters the guide vane 2, it rotates through the guide action of the guide vane 2. Under the action of the rotation of the airflow, the formed cyclone flow state is more Stablize. Moreover, the cyclone can make the cleaning of the filter bag into a wave shape, which is a very ideal state for cleaning the filter bag, and the cleaning efficiency is higher. The cyclone can better bring the airflow to the bottom of the long filter bag, which is very suitable for long filter bags. Bag cleaning nozzle.

The utility model comprises: a nozzle 1 and a guide vane 2 .

The utility model will be further described below in conjunction with the accompanying drawings and embodiments.

Example 1: As shown in Figures 1 and 2, a swirling device including a guide vane 2 is installed inside the upper gas inlet of the nozzle 1 of the Venturi structure of the bag filter. The central axis of the guide vane 2 is connected to the nozzle 1 coaxial.

In the foregoing, a symmetrical even number of guide vanes 2 are installed on the swirl device.

In the foregoing, the upper surface of the guide vane 2 is a free-form surface in space.

In the foregoing, the gap between the outer end of the guide vane 2 and the inner wall of the nozzle 1 is less than 20 mm.

In the foregoing, the swirling device is mounted on the inner wall of the nozzle 1 through a fixed connecting rod passing through the central axis.

In the above, the inclination angle between the guide vane 2 and the central axis of the swirling device is 35-65°.

In the above, the nozzle diameter D/nozzle height L is less than 1.

Claims (7)

1. The improved energy-saving short Venturi nozzle for the long bag dust remover comprises a nozzle (1) and guide vanes (2); the device is characterized in that a cyclone device comprising a guide vane (2) is arranged on the inner side of an upper end gas inlet of a nozzle (1) of a Venturi structure of the bag type dust collector, and the central axis of the guide vane (2) is coaxial with the nozzle (1).

2. The improved energy-saving short venturi nozzle for long bag dust remover according to claim 1, characterized in that the rotational flow device is installed with even number of symmetrical guide vanes (2).

3. The improved energy-saving short venturi nozzle for long bag dust remover according to claim 1, characterized in that the upper side surface of the guide vane (2) is a space free curved surface.

4. The improved energy-saving short venturi nozzle for long bag dust remover according to claim 1, characterized in that the gap between the outer end of guide vane (2) and the inner wall of nozzle (1) is less than 20 mm.

5. The improved energy-saving short venturi nozzle for long bag dust collector as claimed in claim 1, wherein the swirling device is installed on the inner wall of the nozzle (1) by a fixed link passing through the central axis.

6. The improved energy-saving short venturi nozzle for long bag dust remover according to claim 1, characterized in that the angle of inclination of the guide vane (2) and the central axis of the swirling device is 35-65 °.

7. The improved energy-saving short venturi nozzle for long bag dust remover according to claim 1, characterized in that the nozzle caliber D/nozzle height L is less than 1.

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