CN201140005Y - A high-efficiency horizontal spiral air volume separator - Google Patents

Abstract

A high-efficiency horizontal spiral air volumetric separator belongs to the technical field of separation and purification, and is used to solve the problems of poor separation effect and difficult separation of small dust particles by common horizontal volumetric separators. The composition includes the ash collection bin, and the bottom of the ash collection bin is equipped with an ash collection bin valve. The special feature is that three-stage multi-leaf spiral air ducts are arranged in sequence on the upper part of the ash collection bin. Among them, the first-stage multi-leaf spiral air duct Located at the front mouth of the ash collection bin, the second and third stage multi-leaf spiral air ducts are located inside the ash collection bin. The utility model has the following characteristics: 1. The separation effect is good, the separated particles can be less than 20 μm, and the separation is rapid; 2. It is beneficial to cooling, and can reduce the working load and heat load of the terminal dust removal device, thereby ensuring the normal operation of the terminal dust removal device ; 3. The additional buffer bin and buffer bin valve can avoid the suspension phenomenon that affects the negative pressure of the system, so that the dust particles can be well deposited in the buffer bin; 4. On the premise of ensuring the flow area, the equipment can be made larger to reduce.

Description

A high-efficiency horizontal spiral air volume separator

technical field

The utility model relates to a separation device, in particular to a gas-solid separator used in primary purification occasions in the metallurgical industry and building material industry and terminal purification occasions with little dust, and belongs to the technical field of separation and purification.

Background technique

Sintering and ironmaking plants in the metallurgical industry, cement and lime plants in the building materials industry must use air purification devices to purify the high-temperature flue gas generated during the production process. A commonly used horizontal volumetric separator, its structure is equivalent to a large buffer bin, it uses the difference in specific gravity between dust and air to separate, when the flue gas flow enters the separator, the flow area suddenly increases, the flow rate and pressure Rapidly lower, the air loses its ability to carry the dust, achieving the purpose of separation. The separation effect of the separator is mainly affected by the pressure difference. In order to increase the pressure difference, it is necessary to make the volume of the separator very large. At the same time, in the process of ash discharge, after the valve is opened, the negative pressure of the system will be affected, resulting in suspension and reverse pumping, and the dust with small particle size will float again after separation, which will affect the separation effect, so it can only separate particles above 0.5mm , and the separation is not complete.

Contents of the invention

The utility model is used to overcome the defects of the prior art and provide a high-efficiency horizontal spiral wind volumetric separator with complete flue gas separation, separated particles smaller than 20um and rapid separation.

The said problem of the utility model is solved by the following technical solutions:

A high-efficiency horizontal spiral air volumetric separator, which includes an ash collection bin, and the bottom of the ash collection bin is provided with an ash collection bin valve. The leaf spiral air duct, wherein, the first-stage multi-leaf spiral air duct 1 is located at the front opening of the ash collection bin 5, the second-stage multi-leaf spiral air duct 2 and the third-stage multi-leaf spiral air duct 3 are located in the ash collection bin.

In the above-mentioned high-efficiency horizontal spiral wind volumetric separator, the first, second and third multi-leaf spiral air pipes are all composed of straight pipe sections and tapered pipe sections, and the diameters of the straight pipe sections are d1, d2, d3 respectively, The diameter ratio of the straight pipe section is d1:d2:d3=1:0.7:0.5, and the diameter of the large end of the tapered pipe section is D1=1.2d1, D2=1.2d2, D3=2.4d3.

The above-mentioned high-efficiency horizontal spiral wind volumetric separator adds a buffer bin 8, the buffer bin is located at the lower part of the ash-collecting bin valve 7, and a buffer bin valve 9 is provided at the bottom of the buffer bin.

In the above-mentioned high-efficiency horizontal spiral wind volumetric separator, the ash collecting bin is provided with a partition 6, which divides the ash collecting bin into three chambers, and the lower parts of each chamber are connected, and the second-stage multi-leaf spiral air Pipe and the third-stage multi-leaf spiral air duct are respectively located in a warehouse.

In the above-mentioned high-efficiency horizontal spiral wind volumetric separator, the blades of the three-stage multi-leaf spiral air duct have a helical angle of 30°-45°, and their helical directions are the same.

The utility model improves on the problems of poor separation effect of ordinary horizontal volumetric separators and difficult separation of small dust particles. A buffer bin and a valve are added under the valve of the ash collecting bin. After improvement, the utility model has the following characteristics: 1. The separation effect is good. It can be purified, the separated particles can be less than 20um, and the separation is rapid; 2. It is conducive to cooling, and part of the heat will be lost during the separation process, which greatly reduces the working load and heat load of the terminal dust removal device, thus ensuring the terminal dust removal device. 3. The additional buffer bin and buffer bin valve can avoid the suspension phenomenon that affects the negative pressure of the system, so that the dust particles can be well deposited in the buffer bin; 4. Under the premise of ensuring the flow area, it can make the The volume of the equipment is greatly reduced.

Description of drawings

Fig. 1 is a structural representation of the utility model;

Fig. 2 is a left side view of Fig. 1 .

The numbers in the attached drawings are as follows: 1. The first-stage multi-leaf spiral air duct; 2. The second-stage multi-leaf spiral air duct; 3. The third-stage multi-leaf spiral air duct; 4. Outlet duct; 5. Ash collection silo; 6. Partition; 7. Ash collection bin valve; 8. Buffer bin; 9. Buffer bin valve.

Detailed ways

Referring to Fig. 1, the utility model includes a bucket-shaped ash collection bin 5, the bottom of the ash collection bin is provided with an ash collection bin valve 7, and a three-stage multi-leaf spiral air duct is sequentially arranged on the coaxial line at the upper part of the ash collection bin, wherein, the first The first-stage multi-leaf spiral air duct 1 is located at the front mouth of the ash collection bin 5, and the large end of the tapered pipe section is joined with the front wall of the ash collection bin. Both the second-stage multi-leaf spiral air duct 2 and the third-stage multi-blade spiral air duct 3 are located in the ash collection bin. There is a partition 6 inside the ash collection bin, which divides the ash collection bin into three chambers, and the lower part of each chamber is connected. indoor. It can be seen from the figure that the first-stage, second-stage, and third-stage multi-leaf spiral air ducts are all composed of straight pipe sections and tapered pipe sections. The diameters of the straight pipe sections are d1, d2, and d3 respectively, and the diameters of the large ends of the tapered pipe sections are respectively For D1, D2, D3. The diameter ratio of the straight pipe section of the three-stage multi-leaf spiral air duct is d1:d2:d3=1:0.7:0.5, and the diameter of the large end of the tapered pipe section is D1=1.2d1, D2=1.2d2, D3=2.4d3. The helical angle of the blades of the three-stage multi-leaf spiral duct is 30°-45°, and the helical directions are the same.

Referring to Fig. 1 and Fig. 2, a buffer bin 8 is added, the buffer bin is located at the bottom of the ash-collecting bin valve 7, and the buffer bin bottom is provided with a buffer bin valve 9. This setting can ensure a good seal when the separator is working, and avoid the phenomenon of suspension and back pumping. When ash is released, the ash collection bin valve 7 is closed, and the buffer bin valve 9 is opened to release the ash particles in the buffer bin. Normally, the valve of the ash collection bin is opened and the valve of the buffer bin is closed, so that the ash can be well deposited in the buffer bin.

The working principle of the utility model is as follows: the flue gas flow first enters the first-stage multi-leaf spiral air duct of the separator, and forms a spiral wind under the guidance of the blades. When the inner walls of the separator meet, they change direction and fall downward. At the same time, due to the different friction coefficients between the dust particles and the air, under the action of the spiral blades, the speed of the dust particles decreases slower than that of the air. In addition, due to the increase of the flow area after the flue gas flow enters the separator, the flow rate and pressure decrease, and the air loses its ability to carry dust. Under the action of the above three factors, a cavity is formed in the center of the large end of the conical section of the first-stage multi-leaf spiral air duct, and the flue gas that has been separated by the primary stage enters the second-stage multi-leaf spiral air duct. Since the flow area of the second-stage multi-leaf spiral duct is smaller than that of the first-stage multi-leaf spiral duct, after the decelerated flue gas flow enters the second-stage multi-leaf spiral duct, it rapidly increases in speed and forms a spiral wind, centrifugal force and friction The force effect is more obvious. The flow area at the large end of the tapered pipe section of the second-stage multi-leaf spiral duct increases, the flow velocity and pressure decrease rapidly, and the air loses the ability to carry dust again. The dust particles in the place are further separated from the air. The flue gas after secondary separation enters the third-stage multi-leaf spiral air duct, and the separation process is the same as that of the second-stage multi-leaf spiral air duct, and the cleaner flue gas flows into the outlet duct 4 . In the above separation process, due to the increase of the circulation area, part of the heat will also be dissipated, which greatly reduces the working load and heat load of the terminal dust removal device, thereby ensuring the normal operation of the terminal dust removal device.

Claims (5)

1. efficient horizontal spiral wind positive displacement separator, comprise the grey storehouse of collection in the formation, collect bottom, grey storehouse and be provided with the grey storehouse of collection valve, it is characterized in that: described collection Hui Cang top coaxial line sets gradually three grades of leafy spiral ducts, wherein, the leafy spiral duct of the first order (1) is positioned at collection prosopyle place, grey storehouse (5), and leafy spiral duct in the second level (2) and the leafy spiral duct of the third level (3) are positioned at the grey storehouse of collection.

2. efficient horizontal spiral wind positive displacement separator according to claim 1, it is characterized in that: the described first order, the second level, the leafy spiral duct of the third level are formed by straight length and Taper Pipe section, its straight length diameter is respectively d1, d2, d3, the straight length diameter is than being d1: d2: d3=1: 0.7: 0.5, its Taper Pipe section outside diameter D1=1.2 d1, D2=1.2d2, D3=2.4d3.

3. efficient horizontal spiral wind positive displacement separator according to claim 2 is characterized in that: set up surge bunker (8), described surge bunker is positioned at collection grey storehouse valve (7) bottom, and the surge bunker bottom is provided with surge bunker valve (9).

4. according to claim 1 or 2 or 3 described efficient horizontal spiral wind positive displacement separators, it is characterized in that: be provided with dividing plate (6) in the grey storehouse of described collection, dividing plate will collect grey storehouse and be divided into three bins, each bin bottom communicates, and leafy spiral duct in the described second level and the leafy spiral duct of the third level are each positioned at respectively in the bin.

5. efficient horizontal spiral wind positive displacement separator according to claim 4, it is characterized in that: the blade screw angle of described three grades of leafy spiral ducts is 30 °～45 °, and its hand of spiral is identical.

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