A dust removal and desulfurization tower

Abstract

The present invention relates to a dust removal and desulfurization tower, comprising a tower body provided with an air inlet and outlet, and a spray unit and a demister provided within the tower body; the spray unit comprising a spray pipe and a nozzle provided on the spray pipe, the spray pipe being connected to an external water source via a water pipe; wherein: a spray zone consisting of a plurality of vertically arranged pipes is provided in the middle and lower portion of the tower body, and spray units are provided above and below the spray zone; a water retaining chimney is provided above the spray zone, and the demister is provided between the water retaining chimney and the air outlet. The present invention has a reasonable layout within the tower, sufficient mixing of exhaust gas and water mist, an increased adsorption area, and improved dust removal and desulfurization efficiency; the chimney design within the tower further increases the chances of water mist collision, thereby improving the exhaust and demisting effect at the air outlet.

Description

Technical field:

[0001] The invention belongs to the field of environmental protection equipment, and in particular relates to a dust removal and desulfurization tower. Background technology:

[0002] Patent application number CN201020047033.9 discloses a high-efficiency desulfurization tower comprising a desulfurization tower body with an air inlet and an air outlet. A desulfurization blade unit is disposed within the desulfurization tower body, and a spray unit is disposed above the desulfurization blade unit. The spray unit includes a spray pipe, the medium input end of the spray pipe being connected to a water circulation system outside the desulfurization tower body, and a nozzle is disposed at the medium output end of the spray pipe. The desulfurization blade unit comprises a fixed mounting plate, on which are mounted multiple desulfurization blade subunits, each consisting of multiple blades arranged and evenly distributed in a spoke-like pattern. A barrel-shaped spray chamber is disposed above each desulfurization blade subunit, each independent of the others. A nozzle is disposed above each spray chamber. This structure utilizes multiple independent spray chambers, ensuring sufficient utilization of the desulfurization slurry, but the overall technical approach is overly simplistic.

[0003] How to reasonably design the functional areas inside the desulfurization tower becomes the research object of this invention. Summary of the invention:

[0004] The purpose of the present invention is to design a dust removal and desulfurization tower in which gas enters the tower body and passes through a pipeline spraying area, a water retaining chimney and a demister in sequence.

[0005] The technical solution of the present invention is implemented as follows: a dust removal and desulfurization tower includes a tower body provided with an air inlet and an air outlet, and a spray unit and a demister arranged in the tower body; the spray unit includes a spray pipe and a nozzle arranged on the spray pipe, and the spray pipe is connected to an external water source through a water pipe; it is characterized in that: a spray area composed of a plurality of vertically arranged pipes is provided in the middle and lower part of the tower body, and a spray unit is provided above and below the spray area; a water retaining chimney is provided above the spray area, and the demister is provided between the top of the water retaining chimney and the air outlet.

[0006] The plurality of pipes are arranged with gaps therebetween, with both ends fixed on baffles, and an external closed space formed by the upper and lower baffles and the outer surfaces of the pipes.

[0007] The diameter of the pipeline is between 15cm and 25cm, and the length is between 70cm and 120cm.

[0008] The pipe is made of one of the following materials: rubber hose; PVC pipe; stainless steel pipe.

[0009] Two air convection openings are provided on the tower body between the upper and lower baffles.

[0010] The air inlet of the tower body is provided with a first spray unit, which is connected to the return water source collected below the tower body through a water pipe with the spray unit below the spray area; and the spray unit above the spray area is connected to tap water through a water pipe.

[0011] A corresponding nozzle is arranged above the spray zone pipeline, and the central axis of the nozzle overlaps with the central axis of the pipeline.

[0012] There are three to five water retaining chimneys, which are evenly distributed on the partition in the upper middle part of the tower body; the top of the water retaining chimney is provided with a suspended cover, and the smoke can diffuse radially through the gap formed by the suspended cover and the top of the water retaining chimney.

[0013] The present invention has reasonable layout in the tower, exhaust gas and water mist are fully mixed, and the adsorption area is increased, thereby improving the dust removal and desulfurization efficiency; the chimney design in the tower further increases the chance of water mist collision and improves the exhaust and demisting effect of the air outlet. Description of the drawings:

[0014] The present invention will be further described below with reference to specific figures:

[0015] Figure 1 Schematic diagram of dust removal and desulfurization tower

[0016] Figure 2 A partial cross-sectional perspective view of the dust removal and desulfurization tower

[0017] Figure 3 Cross-sectional diagram of the main dust removal and desulfurization tower

[0018] in

[0019] 1—Tower body 11—Air inlet 12—Air outlet 13—Convection port

[0020] 2—Spray unit 21—Spray pipe 22—Spray head 3—Demister

[0021] 4—Spraying area 41—Pipeline 42—Baffle 5—Water retaining chimney

[0022] 51 - suspended cover 52 - partition Specific implementation method:

[0023] Reference Figure 1 、 Figure 2 and Figure 3 The dust removal and desulfurization tower includes a tower body 1, a spray unit 2, a demister 3, a spray area 4 and a water retaining chimney 5; an air inlet 11 is provided at the lower part of the tower body 1, an air outlet 12 is provided at the top, and a first spray unit 2 is provided on the air inlet 11.

[0024] The spray unit 2 includes a spray pipe 21 and a nozzle 22 arranged on the spray pipe. The spray pipe 21 is connected to an external water source through a water pipe. The water pipe is shown in the figure. There are two types of external water sources. One is the water collected at the lower end of the tower body, which contains dust and sulfide and is the return water source after sedimentation and recycling; the other is tap water, which is used as a supplementary water source.

[0025] The spray zone 4 is located in the lower middle portion of the tower body 1 and consists of a plurality of vertically arranged pipes 41. These pipes 41 are arranged with gaps between them and secured at both ends to baffles 42. The upper and lower baffles 42 and the outer surfaces of the pipes form an external enclosed space. Water droplets within the tower body converge into a stream, flowing downward along the walls, the upper baffles 42, and the pipes 41. The external enclosed space can be treated as follows: two air convection ports 13 are provided in the tower body between the upper and lower baffles 42 to allow for the entry of outside air, creating convection heat dissipation and further reducing flue gas temperature, facilitating dust removal, desulfurization, and mist reduction.

[0026] Furthermore, the diameter of pipe 41 is between 15cm and 25cm, and the length is between 70cm and 120cm. An appropriate diameter ensures a balance between spray uniformity and adsorption to the pipe wall, while the length maximizes adsorption opportunities and heat dissipation area. The following materials can be used for pipe 41: rubber hose, PVC pipe, or stainless steel pipe.

[0027] Spray units 2 are located above and below the spray zone 4. The spray unit 2 below the spray zone and the first spray unit 2 at the air inlet are connected to the return water source collected below the tower body 1 via a water pipe. The spray unit 2 above the spray zone 4 is connected to tap water, which has been added with a desulfurizer, through a water pipe to perform the final desulfurization and scrubbing of the flue gas after the first and second spraying steps. As the water mist flows downward and the flue gas flows upward, convection is formed in the longer pipe 41, ensuring full contact between the mist and the gas, achieving optimal desulfurization and dust removal results. Furthermore, the low and constant temperature of the tap water suppresses white mist at the air outlet.

[0028] Furthermore, a corresponding nozzle 22 is provided above the spray zone pipe 41, and the central axis of the nozzle 22 overlaps with the central axis of the pipe 41, ensuring that the water mist can cover and mask the pipe opening and contact the rising smoke.

[0029] A water-blocking chimney 5 is provided above the spraying area 4. Three to five water-blocking chimneys 5 are provided and evenly distributed on the partition 52 in the upper middle part of the tower body 1. The top of the water-blocking chimney 5 is provided with a suspended cover 51, and the flue gas can diffuse radially through the gap formed by the suspended cover 51 and the top of the water-blocking chimney. The flue gas mist diffused laterally from adjacent water-blocking chimneys 5 increases the chances of mutual collision and collision with the tower wall, increases the probability of condensation into water droplets, and prevents the flue gas from rushing directly into the air outlet 12. Furthermore, it can also promote the condensation of small air masses into large air masses, so as to facilitate adsorption by the demister 3 provided between the top of the water-blocking chimney 5 and the air outlet 12, so that the water content of the discharged flue gas is lower, and the occurrence of white mist in the tower body emission is reduced in a low-temperature environment.

Claims

1. A dust removal and desulfurization tower, comprising a tower body provided with an air inlet and an air outlet, and a spray unit and a demister disposed within the tower body; the spray unit comprising a spray pipe and a nozzle disposed on the spray pipe, the spray pipe being connected to an external water source via a water pipe; characterized in that: A spray area consisting of a plurality of vertically arranged pipes is provided in the middle and lower part of the tower body, and a spray unit is provided above and below the spray area; a water retaining chimney is provided above the spray area, and a demister is provided between the water retaining chimney and the air outlet; a plurality of pipes in the spray area are arranged with gaps, and both ends are fixed on the baffles, and an external closed space is formed by the upper and lower baffles and the outer surface of the pipes; two air convection ports are provided on the tower body between the upper and lower baffles; a a corresponding nozzle, and the central axis of the nozzle overlaps with the central axis of the pipeline; a first spray unit is provided on the air inlet of the tower body, and the first spray unit and the spray unit below the spray area are connected to the return water source collected below the tower body through a water pipe; and the spray unit arranged above the spray area is connected to tap water through a water pipe; three to five water-retaining chimneys are provided, which are evenly distributed on the partition in the middle and upper part of the tower body; the top of the water-retaining chimney is provided with a suspended cover, and the smoke can diffuse radially through the gap formed by the suspended cover and the top of the water-retaining chimney.

2. A dust removal and desulfurization tower according to claim 1, characterized in that: The pipe diameter is between 15cm-25cm and the length is between 70cm-120cm.

3. A dust removal and desulfurization tower according to claim 2, characterized in that: The pipe shall be made of one of the following materials: rubber hose; PVC pipe; stainless steel pipe.

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