Flue gas pretreatment system of bag type dust collector

Abstract

Relates to the technical field of flue gas treatment, in particular to a flue gas pretreatment system of a bag type dust collector, which comprises two dust collector bodies arranged side by side at an interval, a pretreatment box is clamped between the two dust collector bodies, the top surface of the pretreatment box is communicated with a confluence shell cavity, and a baffling box is fixed on the outer wall of the rear end of the pretreatment box; an air inlet is formed in the lower portion of the front end wall of the pretreatment box, a flue pipe with one end connected with the air inlet and the other end communicated with an inner cavity in the upper portion of the baffling box is arranged in the pretreatment box, the inner cavity in the lower portion of the baffling box is correspondingly communicated with air inlet pipes at the lower ends of the two dust remover bodies, and air outlet pipes at the upper ends of the dust remover bodies are correspondingly communicated with the confluence shell cavity. Air outlets are formed in the upper part of the front end wall of the pretreatment box; a sulfur removal spraying device is arranged at the top of the flue pipe; the flue gas pretreatment system is exquisite in structure, economical and convenient while the treatment effect is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of flue gas treatment, in particular to a bag type dust collector flue gas pretreatment system. Background Art

[0002] It is well known that before the flue gas enters the bag filter, it usually needs to undergo some pretreatment, which can improve the dust removal effect, extend the life of the filter bags, and ensure the stable operation of the equipment; and the flue gas pretreatment includes cooling treatment, wet treatment, pre-dust removal, desulfurization and denitrification, etc. For example, the flue gas treatment system disclosed in the Chinese invention patent with announcement number CN106334428A performs a series of pretreatments on the flue gas before dust removal; however, most of the existing pretreatment equipment is separately arranged and connected in series through pipelines to form a system, which often requires individual disassembly and transportation, has a low degree of integration, occupies a large area, and can no longer meet the needs of convenience and low cost. Utility Model Content

[0003] In order to overcome the deficiencies in the background technology and solve the existing technical problems, the utility model discloses a bag filter flue gas pretreatment system, which has a sophisticated structure, is economical and convenient while ensuring the treatment effect.

[0004] In order to achieve the above-mentioned invention object, the utility model adopts the following technical solutions:

[0005] A bag-type dust collector flue gas pretreatment system comprises two dust collector bodies spaced apart and arranged side by side, a pretreatment box is sandwiched between the two dust collector bodies, the top surface of the pretreatment box is connected to a confluence shell cavity, a deflection box is fixed to the outer wall of the rear end of the pretreatment box; an air inlet is provided at the lower part of the front end wall of the pretreatment box, a flue pipe with one end connected to the air inlet and the other end connected to the upper inner cavity of the deflection box is provided in the pretreatment box, the lower inner cavity of the deflection box is respectively connected to the lower air inlet pipes of the two dust collector bodies, the upper air outlet pipes of the dust collector bodies are connected to the confluence shell cavity, and an air outlet is provided at the upper part of the front end wall of the pretreatment box; a desulfurization spray device is provided on the top of the flue pipe.

[0006] Furthermore, the pre-treatment box, the confluence shell cavity and the outer shells of the two dust collector bodies are integrated into an integral structure.

[0007] Furthermore, the flue pipe is configured as an inclined square tube that divides the inner cavity of the pretreatment box into a top cavity and a bottom cavity; the top cavity is respectively connected to the confluence shell cavity and the air outlet, the rear end of the bottom cavity is connected to the lower inner cavity of the deflector box, and the lower end of the bottom cavity is connected to the ash hopper of the dust collector body through a discharge pipe.

[0008] Furthermore, the baffle box is filled with smoke adsorption filler.

[0009] Furthermore, the deflector box is configured as a cover structure in which a sealing cover is arranged on the rear end wall of the pretreatment box, and the lower end of the cover structure is hinged to the rear end wall of the pretreatment box.

[0010] Furthermore, the desulfurization spray device comprises a plurality of spray heads evenly arranged along the length direction of the flue pipe.

[0011] Due to the adoption of the above-mentioned technical solution, the utility model has the following beneficial effects:

[0012] The bag dust collector flue gas pretreatment system disclosed by the utility model, on the basis of the existing bag dust collection units arranged in multiple rows in parallel, can be integrated with a clamped pretreatment box, which not only reduces the pipeline connection and shares the supporting structure of the dust collector, but also occupies a small space and is convenient for overall transportation and movement; the desulfurization liquid sprayed by the desulfurization spray device can not only desulfurize the flue gas passing through the flue pipe, but also can directly cool down and conduction cool down the high-temperature flue gas entering the flue pipe and the dust collector respectively; in addition, the flue gas adsorption filler in the deflection box can also remove large particles of dust or remove carbon, nitrogen oxides, etc. from the flue gas, and the whole system has good pretreatment effect and low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the implementation structure of the utility model;

[0014] Figure 2 yes Figure 1 Schematic diagram of the right view structure.

[0015] In the figure: 1. air outlet; 2. air inlet; 3. dust collector body; 4. desulfurization spray device; 5. flue pipe; 6. confluence shell cavity; 7. baffle box; 8. pretreatment box; 9. discharge pipe. DETAILED DESCRIPTION

[0016] The technical solution of the present invention will be described below in conjunction with the drawings in the embodiments of the present invention. In the description, it should be understood that if there are terms such as "upper", "lower", "front", "rear", "left", "right" and the like indicating directions or positional relationships, they are only corresponding to the drawings of the present invention, for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific direction:

[0017] Combined with Figure 1-2The bag filter flue gas pretreatment system comprises two spaced and arranged side by side dust collector bodies 3, or two rows of multiple dust collector bodies 3; a pretreatment box 8 is sandwiched between the two dust collector bodies 3, and the top surface of the pretreatment box 8 is connected with a confluence shell cavity 6, and the confluence shell cavity 6 is laid flat on the top of the two dust collector bodies 3 and the pretreatment box 8, and the entire top surface of the pretreatment box 8 is connected to the confluence shell cavity 6, and a deflection box 7 is fixed to the outer wall of the rear end of the pretreatment box 8; according to needs, the pretreatment box 8, the confluence shell cavity 6 and the outer shells of the two dust collector bodies 3 are integrated into an integral structure, which is more sophisticated and integrated, not only reducing the pipeline connection and sharing the dust collector legs, but also occupying a small space, which is convenient for overall transportation and movement;

[0018] An air inlet 2 is provided at the lower part of the front end wall of the pretreatment box 8, and a flue pipe 5 is provided in the pretreatment box 8, one end of which is connected to the air inlet 2 and the other end is connected to the upper inner cavity of the deflector box 7; the lower inner cavity of the deflector box 7 is respectively connected to the lower air inlet pipes of the two dust collector bodies 3, and the upper air outlet pipe of the dust collector body 3 is correspondingly connected to the confluence shell cavity 6, and an air outlet 1 is provided at the upper part of the front end wall of the pretreatment box 3. The entire flow path of the flue gas is to enter from the air inlet 2, enter the pretreatment box 8 along the flue pipe 5, and then enter the dust collector body 3 for bag dust removal, and the dust-removed flue gas is merged into the confluence shell The flue gas passes through the pretreatment box 8 and is discharged from the air outlet 1. As required, the flue pipe 5 is configured as an inclined square tube that divides the inner cavity of the pretreatment box 8 into a top cavity and a bottom cavity. The top cavity is respectively connected to the confluence shell cavity 6 and the air outlet 1, and the rear end of the bottom cavity is respectively connected to the lower inner cavity of the baffle box 7. The lower end of the bottom cavity is connected to the ash hopper of the dust collector body 3 through the discharge pipe 9, that is, the flue gas enters the bag dust collector upward from the ash hopper, and the flue gas circulates in the top cavity and the bottom cavity of the pretreatment box 8, further extending the flow path and improving the flue gas treatment effect.

[0019] A desulfurization spray device 4 is provided on the top of the flue pipe 5. The desulfurization spray device 4 includes a plurality of spray heads evenly arranged along the length direction of the flue pipe 5. The desulfurization is carried out by wet desulfurization, and the spraying liquid can also have a cooling effect. The deflector box 7 is filled with flue gas adsorption fillers, and different fillers are filled according to large particle dust removal or removal of carbon, nitrogen oxides, etc. According to needs, the deflector box 7 is configured as a sealing cover provided on the rear end wall of the pretreatment box 8. The lower end of the cover structure is hinged to the rear end wall of the pretreatment box 8, so that the deflector box 7 can be rotated to open and the fillers can be replaced.

[0020] In the implementation of the bag-type dust collector flue gas pretreatment system described in the utility model, when the high-temperature flue gas enters the flue pipe 5 from the air inlet 2, it is cooled and desulfurized by the liquid sprayed by the desulfurization spray device 4. After the flue gas enters the pretreatment box 8 along the flue pipe 5, it is preliminarily treated by the flue gas adsorption filler, and then enters the dust collector body 3 for bag dust removal. The dust-removed flue gas converges into the confluence shell cavity 6, then passes through the top cavity of the pretreatment box 8, and is finally discharged from the air outlet 1.

[0021] The parts of the present invention that are not described in detail are prior art. It is obvious to those skilled in the art that the present invention is not limited to the details of the above-mentioned exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the above-mentioned embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is limited by the attached claims rather than the above description. Therefore, it is intended to include all changes within the meaning and scope of the equivalent elements of the claims in the present invention, and any figure marks in the claims should not be regarded as limiting the content of the claims involved.

Claims

1. A bag filter flue gas pretreatment system, characterized by: The invention comprises two spaced-apart and arranged side by side dust collector bodies (3), a pretreatment box (8) being sandwiched between the two dust collector bodies (3), the top surface of the pretreatment box (8) being connected to a converging shell cavity (6), a deflection box (7) being fixed to the outer wall at the rear end of the pretreatment box (8); an air inlet (2) being provided at the lower part of the front end wall of the pretreatment box (8), a flue pipe (5) being provided in the pretreatment box (8) with one end connected to the air inlet (2) and the other end connected to the upper inner cavity of the deflection box (7), the lower inner cavity of the deflection box (7) being respectively connected to the lower air inlet pipes of the two dust collector bodies (3), the upper air outlet pipes of the dust collector bodies (3) being connected to the converging shell cavity (6), and an air outlet (1) being provided at the upper part of the front end wall of the pretreatment box (8); and a desulfurization spray device (4) being provided at the top of the flue pipe (5).

2. The bag filter flue gas pretreatment system according to claim 1 is characterized in that: The pre-treatment box (8), the confluence shell cavity (6) and the outer shells of the two dust collector bodies (3) are integrated into an integral structure.

3. The bag filter flue gas pretreatment system according to claim 1 is characterized in that: The flue pipe (5) is configured as an inclined square tube that divides the inner cavity of the pretreatment box (8) into a top cavity and a bottom cavity; the top cavity is respectively connected to the confluence shell cavity (6) and the air outlet (1), the rear end of the bottom cavity is connected to the lower inner cavity of the deflector box (7), and the lower end of the bottom cavity is connected to the ash hopper of the dust collector body (3) via a discharge pipe (9).

4. The bag filter flue gas pretreatment system according to claim 1 is characterized in that: The baffle box (7) is filled with smoke adsorption filler.

5. The bag filter flue gas pretreatment system according to claim 4 is characterized in that: The deflector box (7) is configured as a cover structure in which a sealing cover is arranged on the rear end wall of the pretreatment box (8), and the lower end of the cover structure is hingedly connected to the rear end wall of the pretreatment box (8).

6. The bag filter flue gas pretreatment system according to claim 1 is characterized in that: The desulfurization spray device (4) comprises a plurality of spray heads evenly arranged along the length direction of the flue pipe (5).

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