CN208177103U - A kind of effective fluidized demister arrangements - Google Patents

Abstract

The utility model discloses a high-efficiency fluidized demister device. The fluidized demister adopts a variable-diameter pipe with a large top and a small bottom, and a multi-layer defogging chamber is set in the variable-diameter pipe; the airflow enters from the bottom of the variable-diameter pipe, and the demisting medium in the demisting chamber is fluidized under the action of the rising airflow At the same time, the rising airflow encounters the demister medium in a fluidized state. Under the action of inertia and deflection, the direction of the airflow shifts, and the liquid droplets and solid particles carried in the airflow are continuously adsorbed by the surface of the spherical demister medium. , condensation, interception, and the airflow after the demister medium removes the liquid droplets is discharged from the top of the demister. The demister medium can choose different specific gravity and porosity according to different wind speeds and system parameters. This spherical design has the characteristics of not easy to block, easy to clean, strong adaptability to working conditions, and good fluidization effect. In addition, the characteristics of the demist medium can be Effectively improve the demisting efficiency, with less investment and low operation and maintenance costs, and can meet the demisting requirements of various demisting occasions.

Description

A high-efficiency fluidized mist eliminator device

technical field

The utility model belongs to the technical field of demisting, in particular to a high-efficiency fluidized demister device.

Background technique

Mist eliminators are widely used in the fields of chemical industry and environmental protection. Mist eliminators are key equipment in many industrial production systems, and their performance directly affects whether other production systems can operate continuously and reliably. At present, the main types of demisters include baffle plate demisters, swirl plate separators, cyclone demisters, wire mesh demisters, electrostatic demisters, fiber demisters, etc.

Although the running resistance of the baffle plate demister is low, its demisting effect is difficult to meet the requirements; the swirl plate separator or cyclone demister has high demisting efficiency and large processing capacity, but the running resistance is large; Although the mist eliminator and the fiber mist eliminator have high demisting efficiency, they are easy to block and have a short service life; although the electrostatic demister has a good demisting effect, its investment and operating costs are high.

This requires that the design of the demister should not only have high demisting efficiency, but also have low resistance, good corrosion resistance, easy cleaning and maintenance, anti-clogging, low energy consumption, etc.

Contents of the invention

The purpose of the utility model is to overcome the shortcomings and deficiencies of the above-mentioned prior art, and provide a high-efficiency fluidized demister, which has high demisting efficiency, small pressure loss, acid and corrosion resistance, anti-clogging, low energy consumption, low cost and easy Maintenance, adaptability and other excellent performance.

The purpose of this utility model is achieved through the following technical solutions:

A high-efficiency fluidized demister. The gas to be treated is introduced from one end of the vertically installed fluidized demister and discharged from the other end. The demisting chamber enclosed by the sieve plate, the sieve plate and the variable diameter pipe and the demisting medium placed in the demisting chamber, the entrance area of the variable diameter pipe is smaller than the outlet area, and the entrance of the variable diameter pipe faces downward The gas to be treated is introduced, and the outlet of the variable-diameter pipe is upward to discharge the purified gas. The gas to be treated contains atomized liquid and/or solid particles.

Preferably, the outlet area at the upper end of the variable-diameter pipe is 1.1 to 8 times the area of the inlet at the lower end, and the cross-section of the variable-diameter pipe gradually and continuously expands from bottom to top.

Preferably, the demisting medium is a spherical porous medium.

Preferably, the demisting medium includes solid pellets, hollow pellets and porous pellets, and the defogging medium is a mixture of different specific gravity, different porosity, and different materials.

Further, the diameter of the demisting medium is 10 mm to 100 mm.

From the above, the low-resistance and high-efficiency demister of the fluidized demister, at least one of the fluidized demisters is installed in the hole of the flower plate in the closed space, and the fluidized demister together with the flower plate The closed space is divided into a clean air chamber and a mist chamber. In the clean air chamber, an extension tube is connected above the outlet of each fluidized demister, and a cleaning nozzle connected to a liquid pipe is arranged above the extension tube for cleaning the demister medium; A gas nozzle connected to a compressed gas pipe is arranged below the inlet of each fluidized demister in the mist chamber for pre-fluidizing the demister medium.

Preferably, multiple low-resistance fluidized mist eliminator devices are combined in series in a closed space.

The utility model has the following advantages relative to the prior art:

The airflow carrying atomized liquid and or solid particles enters the fluidized demister from the sieve plate. Under the action of the airflow, the spherical porous media accumulated in the variable diameter pipe moves upward. After reaching a certain height, the variable diameter pipe adopts the upper end With the special design of large opening and small opening at the lower end, the area of the upper cross-section increases continuously, and the velocity of the airflow above becomes smaller, so that the velocity of the airflow is lower than the fluidization velocity of the demisting medium, so that the demisting medium moves to the edge of the variable-diameter pipe and below, forming a fluidized form The inclination angle of the side wall of the variable-diameter pipe makes the spherical porous medium on the edge move down along the side wall of the variable-diameter pipe under the action of gravity to fill the porous medium blown up by the airflow, and then circulates to form a stable Fluidized form, the demister medium in the fluidized state has less pressure loss than the baffle demister, and has lower energy consumption and higher safety than the electrostatic capture demister.

The fluidization velocity refers to the corresponding wind speed when the medium overcomes its own gravity and moves upward in the fluidized state, which is called the fluidization velocity. The fluidized state means that the medium enters the container at a certain speed and provides a certain wind pressure at the bottom of the container. The partial pressure of the medium is greater than or equal to the weight of the medium on the unit cross-section, and the medium moves in a suspended state without being taken away by the fluid. The upper part must have a Horizontal interface.

The airflow carrying the atomized liquid and/or solid particles contacts and collides with the demisting medium, so that the atomized liquid and/or solid particles are adsorbed and condensed on the surface of the demistering medium, and the purified demisting gas is obtained, so that the atomized liquid And/or solid particles form a stable laminar flow down the side wall of the variable diameter pipe under the action of gravity and collect below the sieve plate.

The defogging medium adopts spherical porous media as the defogging medium, but is not limited to porous media materials, including solid pellets, hollow pellets and porous pellets, and the defogging medium is a mixture of different specific gravity, different porosity, and different materials . Different demisting media can be set according to actual needs. The design of this spherical porous media can not only enhance the fluidization effect of the porous media, but also the pressure loss of the spherical porous media is small, and the surface of the porous media is resistant to liquid droplets and solid particles. The adsorption effect can improve the demisting efficiency and reduce the pressure loss of the system. The demistering medium can be removed and replaced directly after it fails for a long time. The operation is convenient and fast, which greatly reduces the equipment cost and maintenance cost, and improves the convenience of maintenance and repair. sex.

The fluidized demister is installed on the flower plate in the confined space, and the structure is simple. The upper part of the fluidized demister is equipped with a cleaning nozzle connected to the liquid pipe, which is used to regenerate and clean the demister medium, so that the demister attached to the demister medium Various liquids on the surface, such as acid mist and tar, are cleaned to restore the adsorption capacity of the demisting medium.

The lower part of the fluidized demister is equipped with a gas nozzle connected to the compressed gas pipe, which is used to pre-fluidize the demister medium to prevent the demister medium from being blown due to its own gravity when the flow of air flowing into the fluidized demister is insufficient at the beginning. The effect cannot be fluidized. When the atomized liquid is adsorbed, it sticks and sticks together, and cannot form a fluidized demister medium after a sufficient flow of airflow is introduced.

The gas nozzle can not only ensure that the porous medium is in a stable fluidized state during operation, but also has a certain anti-clogging effect.

The utility model has excellent performances such as high defogging efficiency, small pressure loss, corrosion resistance, anti-clogging, low energy consumption, safety, low cost, easy maintenance, and strong adaptability.

Description of drawings

Fig. 1 is the structural representation of the low-resistance fluidized mist eliminator device provided by the utility model in embodiment 2,

Fig. 2 is the structural representation of the low-resistance fluidized mist eliminator device provided by the utility model in embodiment 3,

Fig. 3 is a schematic cross-sectional structure diagram of the low-resistance fluidized mist eliminator provided by the utility model in embodiment 1 when a single-layer sieve plate is installed in a fluidized state.

Detailed ways:

Below in conjunction with accompanying drawing and specific embodiment, the utility model is described in further detail.

Embodiment 1 As shown in Figure 3, the utility model is a high-efficiency fluidized demister. The gas to be treated is introduced from one end of the vertically installed fluidized demister and discharged from the other end. The fluidized demister It includes a variable diameter pipeline 3, a sieve plate 5 arranged at the bottom of the variable diameter pipeline, a demister chamber 9 enclosed between the sieve plate and the variable diameter pipeline, and a demister medium 8 placed in the demist chamber. The cross-section of the inlet 31 of the variable-diameter pipeline is smaller than that of the outlet 32. The inlet of the variable-diameter pipeline is downward for introducing the gas to be treated, and the outlet of the variable-diameter pipeline is upward for discharging the purified gas. The gas to be treated contains atomized liquid and/or solid particles.

The cross-sectional area of the upper outlet of the variable-diameter pipe is 1.1 to 8 times that of the lower-end inlet, and the cross-section of the variable-diameter pipe gradually expands continuously from bottom to top. The demisting medium is a spherical porous medium. The sieve plate 5 is a wire mesh, a perforated plate or other structures with good isolation and ventilation effects. The defogging medium includes solid pellets, hollow pellets and porous pellets, and the defogging medium is a mixture of different specific gravity, different porosity, and different materials. The diameter of the defogging medium is 10mm to 100mm.

Embodiment 2, as shown in Figure 1, the low-resistance and high-efficiency demister of the fluidized demister, at least one of the fluidized demisters is installed in the hole of the flower plate 4 in the closed space, and the fluidized demister Together with the flower plate, the demister and the flower plate divide the confined space into a clean air chamber 11 and a mist chamber 6. In the clean air chamber, an extension tube 2 is connected above the outlet of each fluidized demister to prevent the demisting medium from running away. A cleaning nozzle 10 connected to the liquid pipe is provided above the cylinder 2 for cleaning the demister medium; a gas nozzle 7 connected to the compressed gas pipe is provided below the inlet of each fluidized demister in the mist chamber for pre- Fluidized demister medium.

The cross-sectional area of the upper outlet of the variable-diameter pipe is 1.1 to 8 times that of the lower-end inlet, and the cross-section of the variable-diameter pipe gradually expands continuously from bottom to top. The demisting medium is a spherical porous medium. The sieve plate 5 is a wire mesh, a perforated plate or other structures with good isolation and ventilation effects. The defogging medium includes solid pellets, hollow pellets and porous pellets, and the defogging medium is a mixture of different specific gravity, different porosity, and different materials. The diameter of the defogging medium is 10mm to 100mm.

Embodiment 3, as shown in Figure 2, the low-resistance and high-efficiency demister of the fluidized demister, at least one of the fluidized demisters is installed in the flange hole of the flower plate 4 in the closed space, The fluidized demister together with the flower plate divides the confined space into a clean air chamber 11 and a mist chamber 6. In the clean air chamber, an extension tube 2 is connected above the outlet of each fluidized demister. The cleaning spray head 10 connected with the pipe is used for cleaning the demister medium; the gas nozzle 7 connected with the compressed gas pipe is arranged below the inlet of each fluidized demister in the mist chamber, and is used for pre-fluidizing the demister medium.

The aforementioned low-resistance fluidized demister device adopts multiple low-resistance fluidized demister devices connected in series for demisting, and a single fluidized high-efficiency low-drop demister can also be used for demisting according to the size of the demistering area.

The cross-section of the variable-diameter pipe gradually expands continuously from bottom to top, and its shape is not limited to circular frustums, including various polygonal frustums. The demisting medium is a spherical porous medium. The sieve plate 5 is a wire mesh, a perforated plate or other structures with good isolation and ventilation effects. The defogging medium includes solid pellets, hollow pellets and porous pellets, and the defogging medium is a mixture of different specific gravity, different porosity, and different materials. The diameter of the demister medium in the upper low-resistance fluidized demister device is 10mm-100mm, the diameter of the demister medium in the lower low-resistance fluidized demister device is 10mm-100mm, and the lower part of the low-resistance fluidized demister device The cross-sectional area of the outlet at the upper end of the variable-diameter pipe is 1.1 to 8 times the cross-sectional area of the inlet at the lower end, and the cross-sectional area at the upper end of the variable-diameter pipe in the upper low-resistance fluidization demister device is 1.1 to 8 times the cross-sectional area of the inlet at the lower end.

As mentioned above, this device has excellent performances such as simple structure, low cost, high demisting efficiency, small pressure loss, acid and corrosion resistance, anti-clogging, simple and convenient maintenance, and strong adaptability, which can effectively prevent the occurrence of "gypsum rain" .

The implementation of the present utility model is not limited by the above-mentioned examples, and any other changes, modifications, substitutions, combinations, and simplifications that do not deviate from the spirit and principles of the present utility model should be equivalent replacement methods. Included within the protection scope of the present utility model.

Claims (7)

1. a kind of effective fluidized demister arrangements, gas to be processed is introduced from vertically-mounted fluidisation demister one end, from another End discharge, which is characterized in that the fluidisation demister include tapered pipeline (3), the sieve plate (5) that tapered pipeline bottom is set, Demisting chamber (9) and the intracavitary demisting medium (8) of demisting, the tapered pipeline are placed in made of enclosing between sieve plate and tapered pipeline Entrance (31) area is less than outlet (32) area, and tapered pipeline enters mouth down for introducing gas to be processed, tapered pipeline outlet Upwards for purification gas to be discharged, contain atomized liquid and/or solid particle in gas to be processed.

2. effective fluidized demister arrangements according to claim 1, which is characterized in that tapered pipeline upper end outlet face Product is 1.1~8 times of lower inlet area, and tapered pipeline cross section is gradually continuous from bottom to top to be expanded.

3. effective fluidized demister arrangements according to claim 1, which is characterized in that the demisting medium is spherical porous Medium.

4. effective fluidized demister arrangements according to claim 1, which is characterized in that the demisting medium includes solid small Ball, hollow beads and porous small ball, the demisting medium are the mixture of different specific weight, different porosities, unlike material.

5. effective fluidized demister arrangements according to claim 1, which is characterized in that the demisting media diameters are 10mm ~100mm.

6. effective fluidized demister arrangements according to claim 1, which is characterized in that at least one described fluidisation demister It is mounted in the hole of the card in confined space (4), confined space is divided into air-purifying chamber together with card by fluidisation demister (11) and moist chambers (6), be located in air-purifying chamber each fluidisation demister export above be connected with exntension tubs (2), on exntension tubs (2) Side is equipped with the cleaning sprayer (10) connected with liquid line, for cleaning demisting medium；It is located at each fluidisation demister in moist chambers The gas nozzle (7) connected with compressed gas tube is equipped with below entrance, for fluidizing demisting medium in advance.

7. effective fluidized demister arrangements according to claim 6, which is characterized in that multiple low-resistances fluidize demisting Device device tandem compound is in confined space.