CN103239945A - A large-capacity double-pipe multi-group cyclone dust removal method - Google Patents

Abstract

A large-capacity double-pipe multi-group cyclone dust removal method. Two separate Krezier dust collectors are combined into one group, and there are 2 to 6 groups in total. The parallel cyclone purification and dust removal equipment is composed of angle connection. Each tube is installed in the upper part of the straight cylinder of the dust collector. The inner cylinder is in the center of the straight cylinder, and the top of the inner cylinder is the net gas outlet. The lower part of the straight cylinder is connected with a cone cylinder. , There is a reflective screen at the bottom of the cone, an ash hopper at the bottom, and an ash discharge valve at the bottom of the ash hopper. This solution solves the problem of dust removal and purification of large flue gas volume, overcomes the problem that the diameter cannot be expanded, and the processing capacity is large. The dust removal efficiency for dust particles with a particle size of 20-40 μm reaches 98%. As the first-stage dust removal, it can extend the use of fans. Life, prolong the life of the filter bag in the follow-up bag filter, and reduce the operating cost of the system dust collector.

Description

A large-capacity double-pipe multi-group cyclone dust removal method

technical field

The invention relates to the technical field of environmental protection, in particular to a large-capacity double-pipe multi-group cyclone dust removal method.

Background technique

The traditional cyclone dust removal is to use a single Kreiser tube to purify the flue gas dust produced by ferrosilicon furnaces, cement plants and other industrial furnaces with a small amount of flue gas, and the dust particle size in the flue gas is 20~ The dust removal rate of 40μm can reach more than 98%, but the effect is poor for dust with a particle size of less than 15μm. Remove first. Because of its simple structure, easy manufacture, low cost, and large processing capacity, it is adopted by many domestic environmental protection enterprises. Only within the diameter range can better dust removal effect be achieved. For example, a cyclone tube dust collector with a diameter of 220mm can handle a flue gas volume of 54000m ³ /h. If the diameter of the cyclone tube dust collector is increased, the dust removal efficiency will drop significantly. The requirements of dust removal and purification treatment must be met, and the dust removal efficiency of each unit must reach the highest peak. After years of research and testing, a solution to this contradiction has finally been found in practice and exploration.

Contents of the invention

The object of the present invention is to provide a method for large-capacity double-pipe multi-group cyclone dust removal in view of the deficiencies in the prior art. The dust removal equipment used in the method is a combination of two independent Krezier cyclone dust collectors with opposite cyclone directions. In one group, a total of 2 to 6 groups are combined. The dusty gas inlet pipe of each group is connected with the dusty gas main pipe at an angle of 30 to 35° to form a set of combined cyclone purification and dust removal equipment. As the first Class dust removal equipment, the composition of double pipes includes two Krezier dust collectors of the same size connected in parallel to form a group, each Krezier tube is installed in the upper part of the straight cylinder of the dust collector, and the top surface is annularly sealed , the dust-laden gas enters from the inlet branch pipe, the center is the inner cylinder, the top of the inner cylinder is the clean gas outlet, the lower part of the straight cylinder is connected to the cone cylinder, and the bottom of the cone cylinder is equipped with a reflection screen, and the dust-laden smoke flows from the g The Leizier tube enters the circular cyclone chamber composed of the inner wall of the straight cylinder and the outer wall of the inner cylinder, relying on the centrifugal force of the cyclone airflow, the dust with large particle size falls on the inner wall of the cone cylinder, and passes through the gap between the reflective screen and the cone cylinder. The circular opening of the ring falls into the ash hopper, the rotating air flow is blocked by the reflective screen, turns and rises, and enters the filter bag type dust removal and purification treatment in the next section through the net air outlet. There is a dust discharge valve.

The beneficial effect of adopting this technical solution: solves the problem of dust removal and purification in the amount of flue gas, and also overcomes that the diameter of the Kreiser tube cannot be expanded, and the processing capacity must be large to meet the design requirements for dust removal and purification of large flue gas volumes. The dust removal efficiency can reach 98% for the dust particle size of 20-40μm. This equipment is used as the first-stage dust removal and purification treatment, which can prolong the service life of the fan and extend the life of the filter bag in the subsequent second-stage bag filter. It plays an extremely important role, thereby reducing the operating cost of the system dust collector.

Description of drawings

Figure 1 is a schematic diagram of the parallel combined structure of the large-capacity double-pipe multi-group cyclone dust removal method;

Fig. 2 is a group of cross-sectional structural schematic diagrams in Fig. 1;

Figure 3 is a schematic diagram of a group of Kreiser cyclone tube projections;

In the figure: 1—clean gas outlet, 2—straight cylinder, 3—inner cylinder, 4—cone cylinder, 5—reflecting screen, 6—ash hopper, 7—ash unloading valve, 8—intake pipe, 9— Main intake pipe, 10—director and branch pipe angle.

Detailed ways

The large-scale double-pipe multi-group cyclone dust removal method described in the present invention is described in detail as follows: two separate Krezier cyclone dust collectors are combined into one group, and 2 groups, 3 groups, 4 groups, Composed of 5 groups or 6 groups, each group's intake pipe 8 is connected with the main intake pipe 9 at an angle of 30 degrees to form a set of parallel combined cyclone purification and dust removal equipment as the first stage of dust removal, the composition of double pipes It consists of two Kreiser tubes of the same size connected in parallel to form a group, each tube is installed in the upper part of the straight cylinder 2 of the dust collector, the top surface is ring-shaped, and the dust-laden gas enters from the main intake pipe 9 to the intake branch pipe 8, Inside the center of the straight cylinder 2 is the inner cylinder 3, the top of the inner cylinder 3 is the net gas outlet 1, the lower part of the straight cylinder 2 is connected with the cone cylinder 4, the inner bottom of the cone cylinder 4 is provided with a reflective screen 5, and the cone cylinder 4 An ash hopper 6 is arranged at the bottom, and an ash discharge valve 7 is arranged at the bottom of the ash hopper 6 .

Through the parallel combination of the cyclone dust collector, the cyclone dust removal effect of a single Kreiser tube can be achieved, which completely solves the problem of dust removal and purification of large volume fume and dust in ferrosilicon furnaces, cement plants and various industrial furnaces. The first-stage dust removal effect reaches 98%, which creates conditions for further filter bag dust removal, prolongs the service life of fans and filter bags, and is well received by users. the

Claims (1)

1. A large-capacity double-pipe multi-group cyclone dust removal method is characterized in that: two independent Krezier cyclone dust collectors are combined into one group, and 2 groups, 3 groups, 4 groups, 5 groups or 6 groups are established. The air intake pipes (8) of each group are connected with the main air intake pipe (9) at an angle (10) of 30 degrees to form a set of parallel combined cyclone purification and dust removal equipment as the first stage dust removal, double pipes The composition includes two Kreiser tubes of the same size connected in parallel and combined into a group, each tube is respectively installed in the upper part of the straight cylinder (2) of the dust collector, the top surface is ring-shaped, and the dusty gas flows from the main intake pipe (9) to The air intake branch pipe (8) enters, the inner cylinder (3) is in the center of the straight cylinder (2), the top of the inner cylinder (3) is the net gas outlet (1), and the lower part of the straight cylinder (2) is connected with a cone cylinder (4), the inner bottom of the cone body (4) is provided with a reflective screen (5), the bottom of the cone body (4) is provided with an ash hopper (6), and the bottom of the ash hopper (6) is provided with an ash discharge valve (7).

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