Desulfurization and dust removal integrated device

Abstract

The utility model relates to a desulfurization and dust removal integrated device, which comprises a boiler, a denitration device, a flue, a cooler, a reheater and a chimney, and further comprises the desulfurization and dust removal integrated device, the boiler is communicated with the flue through the denitration device, the flue is communicated with a flue gas inlet at the bottom of the desulfurization and dust removal integrated device through the cooler, and the reheater is communicated with the chimney. The top of the desulfurization and dust removal integrated device is communicated with a chimney through a reheater; a first spraying device is arranged at a flue gas inlet of the desulfurization and dust removal integrated device, foam makers are arranged on the bottom face and the side wall of the bottom of the desulfurization and dust removal integrated device, a baffle structure is arranged at the top of the desulfurization and dust removal integrated device, and a second spraying device is arranged at the bottom of the baffle structure. The dust removal and desulfurization efficiency can be greatly improved.

Description

Technical Field

[0001] The utility model relates to an integrated desulfurization and dust removal device, belonging to the technical field of flue gas desulfurization. Background Art

[0002] The existing flue gas treatment process of coal-fired power plants basically uses a dust collector to capture dust, and then uses desulfurization equipment to separately treat the sulfur in the flue gas. The dust collector can be an electrostatic precipitator, a bag dust collector, or an electric bag composite dust collector. The desulfurization equipment can be dry desulfurization or wet desulfurization. The existing technology does not have a device that organically combines dust removal technology and desulfurization technology while ensuring dust removal efficiency and desulfurization efficiency.

[0003] 201120289617.1 discloses a water-bath foam dust removal, desulfurization, and denitrification device. Polluted gas is sprayed into a foaming liquid through an inlet pipe, forming large bubbles. These large bubbles are then reduced to small bubbles by a fine bubble net. As the small bubbles leave the foaming liquid surface, they generate a large number of small bubbles within the cylinder cavity above the liquid surface, filling the entire cylinder cavity. When the small bubbles reach the defoaming net at the top of the cylinder, most of them burst on the net, transforming into clean gas. After being defogged by a demister, the gas is discharged through an exhaust pipe into the atmosphere. A small portion of the gas returns to the recirculation tank through a bubble discharge pipe and is reused after sedimentation. However, this structure has the following disadvantages: Gas entering the foaming liquid generally forms air channels. After passing through the fine bubble net, large and small bubbles may form. These bubbles may be more numerous in some areas and less numerous in others, preventing them from effectively filling the entire cylinder cavity. Furthermore, turbulent rising bubbles are not formed, and the small bubbles cannot fully merge with each other, failing to effectively capture dust and sulfides in the gas. Utility Model Content

[0004] In order to solve the above problems existing in the prior art, the utility model provides an integrated desulfurization and dust removal device, which can greatly improve the dust removal and desulfurization efficiency.

[0005] The technical solution of the utility model is as follows:

[0006] A desulfurization and dust removal integrated device includes a boiler, a denitrification device, a flue, a cooler, a reheater and a chimney, and also includes the desulfurization and dust removal integrated device, the boiler is connected to the flue through the denitrification device, the flue is connected to the flue gas inlet at the bottom of the desulfurization and dust removal integrated device through the cooler, and the top of the desulfurization and dust removal integrated device is connected to the chimney through the reheater; a first spray device is provided at the flue gas inlet of the desulfurization and dust removal integrated device, a foamer is provided on the bottom surface and bottom side wall of the desulfurization and dust removal integrated device, a baffle structure is provided on the top of the desulfurization and dust removal integrated device, and a second spray device is provided at the bottom of the baffle structure.

[0007] In which, the baffle structure includes a first layer of orifice plates, a second layer of orifice plates and a third layer of orifice plates arranged from bottom to top on the top of the integrated desulfurization and dust removal device, and the second spray device is arranged at the bottom of the first layer of orifice plates; the first layer of orifice plates, the second layer of orifice plates and the third layer of orifice plates are all provided with holes, and the hole diameters of the first layer of orifice plates, the second layer of orifice plates and the third layer of orifice plates are arranged from large to small, and the hole diameter of the first layer of orifice plates is smaller than the bubble diameter generated by the foamer.

[0008] The first layer of orifice plates, the second layer of orifice plates and the third layer of orifice plates are all composed of two plates in a V shape, and the open end of the V-shaped baffle structure is set downward.

[0009] A water storage flue is provided at the bottom of the integrated desulfurization and dust removal device, the water storage flue is connected to a wastewater treatment device, the wastewater treatment device is connected to a dosing device, and the dosing device is connected to a foamer.

[0010] The first, second and third orifice plates are all provided with guide grooves, through which the bubbles adsorbed on the baffle structure are transformed into liquid and discharged into the water storage flue.

[0011] Wherein, a dust collector is connected between the flue and the cooler.

[0012] Wherein, a bubble detection device is installed on the side wall panel of the integrated desulfurization and dust removal device.

[0013] The utility model has the following beneficial effects:

[0014] The utility model pre-doses the bubble liquid with calcium hydroxide or calcium oxide and an active agent, so that the spray liquid forms a large number of small bubbles from the bottom of the device through the foam generator. The bubbles fuse with each other during the rising process, which can absorb dust, sulfur trioxide and sulfuric acid in the flue gas. The principle of bubble coordination changes the principle of dust removal, dry or wet desulfurization of conventional dust collectors, greatly improving the dust removal and desulfurization efficiency.

[0015] The utility model utilizes the second spray device on the upper part to spray the bubbles, so that the bubbles can clean the bubbles after the bubbles merge with the mist droplets, and finally small water droplets are formed at the bottom of the bubbles. The water droplets fall and are caught by the bubbles below, which continuously clean the air droplets below. This cycle can improve the dust removal and desulfurization efficiency.

[0016] The utility model processes the waste liquid so that the waste liquid enters the dosing device for reaction to form new bubbles in the foaming device, thereby forming a cycle and making full use of the active agent and calcium hydroxide. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of an integrated desulfurization and dust removal system;

[0018] Figure 2 This is a diagram of an integrated desulfurization and dust removal device;

[0019] Figure 3 This is a schematic diagram of installing a dust collector in an integrated desulfurization and dust removal system.

[0020] The reference numerals in the figures are as follows:

[0021] 1. Boiler; 2. Denitrification device; 3. Flue; 4. Cooler; 5. Integrated desulfurization and dust removal device; 6. Reheater; 7. Chimney; 51. First spray device; 52. Water storage flue; 53. Foamer; 54. Baffle structure; 55. Second spray device; 56. Bubble detection device; 57. Wastewater treatment device; 58. Dosing device; 8. Dust collector. DETAILED DESCRIPTION

[0022] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0023] See also Figures 1 to 3 , the utility model provides a technical solution:

[0024] Example 1: A desulfurization and dust removal integrated device includes a boiler 1, a denitrification device 2, a flue 3, a cooler 4, a reheater 6 and a chimney 7, and also includes a desulfurization and dust removal integrated device 5. The flue gas generated by the combustion of coal in the boiler 1 passes through the denitrification device 2 for denitrification, and then passes through the cooler 4 from the flue 3 for cooling, so that the flue gas drops from 600 degrees to below 80 degrees. The flue gas then passes through the desulfurization and dust removal integrated device 5 for desulfurization and dust removal, and then passes through the reheater 6 for heating, which can effectively eliminate white smoke. Finally, the flue gas is discharged from the chimney. 7 discharge; a first spray device 51 is provided at the flue gas inlet of the integrated desulfurization and dust removal device 5, and the first spray device 51 is used to spray and humidify the flue gas so that the bubbles generated at the rear end will not burst due to the drying of the flue gas dust. The bottom surface and the bottom side wall of the integrated desulfurization and dust removal device 5 are provided with a foamer 53, which generates bubbles. The bubbles contain calcium hydroxide, an active agent and water. The calcium hydroxide in the bubbles can react with sulfur trioxide and sulfuric acid in the flue gas to generate water and calcium sulfate. The foamer 5 The generated bubbles will collide and merge with each other as they rise with the airflow. The bubbles have a certain viscosity and can more effectively capture sulfur trioxide, sulfuric acid and dust in the flue gas during the rising and merging processes. After the bubbles absorb the dust, their stability and strength will be enhanced to a certain extent, making them less likely to break. The desulfurization and dust removal integrated device 5 is provided with a baffle structure 54 on the top and a second spray device 55 on the bottom of the baffle structure 54. After the bubbles rise to the top of the desulfurization and dust removal integrated device 5, they will encounter the second spray device 55 installed at the bottom of the baffle structure 54. The second spray device 55 will form a continuous droplet layer. After the bubbles merge with the droplets, they can clean the bubbles. Finally, small water droplets are formed at the bottom of the bubbles. After the water droplets fall, they are caught by the bubbles below, which continue to clean the air droplets below. This cycle can improve the dust removal and desulfurization efficiency. A bubble detection device 56 is installed on the side wall of the desulfurization and dust removal integrated device 5 to observe the situation of the bubbles inside the desulfurization and dust removal integrated device 5.

[0025] The baffle structure 54 includes a first layer of orifice plates, a second layer of orifice plates and a third layer of orifice plates arranged from bottom to top on the top of the integrated desulfurization and dust removal device 5, and the second spray device 55 is arranged at the bottom of the first layer of orifice plates; the first layer of orifice plates, the second layer of orifice plates and the third layer of orifice plates are all provided with holes, and the hole diameters of the first layer of orifice plates, the second layer of orifice plates and the third layer of orifice plates are arranged from large to small, and the hole diameter of the first layer of orifice plates is smaller than the diameter of the bubbles generated by the foamer 53. With this arrangement, the bubbles cannot pass through the holes directly, and will be adsorbed on the baffle structure 54, which can effectively prevent the bubbles from escaping.

[0026] The first, second and third orifice plates are each composed of two V-shaped plates, and the open end of the V-shaped baffle structure 54 is set downward. The first, second and third orifice plates are each provided with a guide groove, through which the bubbles adsorbed on the baffle structure 54 are converted into liquid and discharged into the water storage flue 52.

[0027] The integrated desulfurization and dust removal device 5 is provided with a water storage flue 52 at the bottom. The water storage flue 52 is connected to a wastewater treatment device 57, which is connected to a dosing device 58. The dosing device 58 is connected to a foaming device 53. Specifically, the waste liquid in the water storage flue 52 is transported to the wastewater treatment device 57 through a pipeline, where it is precipitated and the calcium sulfate and dust slurry formed is removed. The liquid treated by the wastewater treatment device 57 contains a small amount of calcium hydroxide and activating agent that has not reacted with sulfur trioxide and sulfuric acid. The liquid is then passed into the dosing device 58, where an appropriate amount of activating agent (for generating bubbles) and calcium hydroxide or calcium oxide are added. Finally, the liquid is passed into the foaming device 53 to form new bubbles. In this way, the liquid containing the activating agent and calcium hydroxide forms a cycle after forming bubbles, collecting the waste liquid, treating the wastewater, and dosing, which can fully utilize the activating agent and calcium hydroxide.

[0028] Example 2: Example 2 includes a dust collector 8 connected between the flue 3 and the cooler 4, and the rest of the structure is the same as above. The dust collector 8 can be an electrostatic precipitator, an electric bag composite dust collector or a bag dust collector, which can remove 70%-80% of the dust in advance, reduce the load entering the subsequent desulfurization and dust removal integrated device 5, reduce the sprayer of the first spray device 51, and the dust content in the flue gas is less. The bubbles formed are more stable and not easy to break. At the same time, the dust collected by the dust collector 8 can be used as building materials and has certain value.

[0029] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the description and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. An integrated desulfurization and dust removal device, comprising a boiler (1), a denitrification device (2), a flue (3), a cooler (4), a reheater (6) and a chimney (7), characterized in that: The invention also includes a desulfurization and dust removal integrated device (5), wherein the boiler (1) is connected to a flue (3) via a denitrification device (2), the flue (3) is connected to a flue gas inlet at the bottom of the desulfurization and dust removal integrated device (5) via a cooler (4), and the top of the desulfurization and dust removal integrated device (5) is connected to a chimney (7) via a reheater (6); a first spray device (51) is provided at the flue gas inlet of the desulfurization and dust removal integrated device (5), a foamer (53) is provided on the bottom surface and the side wall of the bottom of the desulfurization and dust removal integrated device (5), a baffle structure (54) is provided on the top of the desulfurization and dust removal integrated device (5), and a second spray device (55) is provided at the bottom of the baffle structure (54).

2. The integrated desulfurization and dust removal device according to claim 1, characterized in that: The baffle structure (54) includes a first layer of orifice plates, a second layer of orifice plates, and a third layer of orifice plates arranged from bottom to top on the top of the desulfurization and dust removal integrated device (5), and the second spray device (55) is arranged at the bottom of the first layer of orifice plates; the first layer of orifice plates, the second layer of orifice plates, and the third layer of orifice plates are all provided with holes, and the diameters of the holes of the first layer of orifice plates, the second layer of orifice plates, and the third layer of orifice plates are arranged from large to small, and the diameter of the holes of the first layer of orifice plates is smaller than the diameter of the bubbles generated by the foamer (53).

3. The integrated desulfurization and dust removal device according to claim 2, characterized in that: The first layer of orifice plates, the second layer of orifice plates and the third layer of orifice plates are all composed of two plates in a V-shape, and the open end of the V-shaped baffle structure (54) is arranged downward.

4. The integrated desulfurization and dust removal device according to claim 3, characterized in that: A water storage flue (52) is provided at the bottom of the integrated desulfurization and dust removal device (5); the water storage flue (52) is connected to a wastewater treatment device (57); the wastewater treatment device (57) is connected to a dosing device (58); and the dosing device (58) is connected to a foaming device (53).

5. The integrated desulfurization and dust removal device according to claim 4, characterized in that: The first layer of orifice plates, the second layer of orifice plates, and the third layer of orifice plates are all provided with guide grooves, through which bubbles adsorbed on the baffle structure (54) are transformed into liquid and discharged into the water storage flue (52).

6. The integrated desulfurization and dust removal device according to claim 5, characterized in that: A dust collector (8) is also connected between the flue (3) and the cooler (4).

7. The integrated desulfurization and dust removal device according to claim 6, characterized in that: A bubble detection device (56) is installed on the side wall panel of the integrated desulfurization and dust removal device (5).

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