Quenching dust removal device for treating chlorine-containing waste gas and waste liquid incineration tail gas

Abstract

The utility model discloses a quenching dust removal device for treating chlorine-containing waste gas and waste liquid incineration tail gas. The quenching dust removal device comprises an emergency water tank, a cooling device and a quenching dust removal tower, the quenching dust removal tower is of an up-down communicated structure and comprises a graphite quenching section at the upper part and a cyclone dust removal section at the lower part; a quenching spraying device and an emergency spraying device are arranged at the top in the graphite quenching section, and the emergency spraying device is connected with an emergency water tank; an air inlet is formed in the top of the side wall of the graphite quenching section; an air outlet is formed in the lower part of the side wall of the cyclone dust removal section; the recovery cavity is connected with a cooling device through a circulating pump; at least three layers of spraying rotational flow devices with the same structure are arranged above the air outlet in the axial direction; the device is compact in overall structure and small in occupied area, dioxin regeneration can be effectively restrained, impurities in tail gas can be separated out through the rotational flow plate, and the separation efficiency is high.

Description

Technical Field

[0001] This utility model relates to the field of chlorine-containing waste gas and waste liquid incineration tail gas treatment, and in particular to a rapid cooling dust removal device for treating chlorine-containing waste gas and waste liquid incineration tail gas. Background Technology

[0002] The exhaust gas from the incineration of chlorine-containing (such as silicon chloride) waste gas and liquid is at a high temperature and contains dust such as silica, requiring cooling and dust removal before discharge. Currently, domestic treatment of exhaust gas from chlorine-containing waste gas and liquid incineration uses multiple scrubbing towers connected in series, which occupies a large area, has a lengthy process, and is costly. For example, Chinese patent CN211189717U discloses a scrubbing tower that uses a spray device positioned above the packing layer used to absorb waste gas. This effectively solves the problem of white smoke and secondary environmental pollution caused by ammonium sulfate particles, such as ammonium sulfate dust, in the scrubbing tower. It reduces ammonium sulfate powder entrainment, improves ammonium sulfate recovery rate, lowers operating costs, and generates higher revenue. However, the scrubbing tower structure disclosed in this patent is not suitable for treating exhaust gas from the incineration of chlorine-containing (such as silicon chloride) waste gas and liquid because the exhaust gas temperature after incineration is high (around 550°C), and the high-temperature waste gas directly impacts the packing layer, causing damage. Chinese patent CN206234834U discloses a quench tower that can rapidly cool high-temperature flue gas, but its impurity removal effect is generally poor. Utility Model Content

[0003] The purpose of this invention is to provide a rapid cooling and dust removal device for treating incineration tail gas containing chlorine waste gas and waste liquid.

[0004] The innovation of this utility model is that: the structure of this application is ingenious, the overall structure is compact, the footprint is small, it can effectively suppress dioxin regeneration, it is equipped with an emergency water tank and an emergency spray device to deal with emergency situations, and the swirl plate can separate impurities in the exhaust gas with high separation efficiency.

[0005] To achieve the aforementioned objectives, the technical solution of this utility model is as follows:

[0006] A rapid cooling dust removal device for treating chlorine-containing waste gas and waste liquid incineration tail gas includes an emergency water tank, a cooling device, and a rapid cooling dust removal tower. The rapid cooling dust removal tower has a vertically connected structure, including an upper graphite rapid cooling section and a lower cyclone dust removal section. A rapid cooling spray device and an emergency spray device are installed at the top of the graphite rapid cooling section, and the emergency spray device is connected to the emergency water tank. An air inlet is provided at the top of the side wall of the graphite rapid cooling section. The bottom of the cyclone dust removal section is a recovery chamber, and an air outlet is provided at the lower part of the side wall. The recovery chamber is connected to the cooling device via a circulating pump. At least three layers of identical spray cyclone devices are arranged axially above the air outlet. Each spray cyclone device includes a dust removal spray device and a cyclone plate arranged below the dust removal spray device. The cyclone plate includes several inclined cyclone blades with evenly distributed through holes, and the cyclone blades are evenly arranged circumferentially along the central axis of the cyclone dust removal section. The outlet of the cooling device is connected to the rapid cooling spray device and each layer of dust removal spray device.

[0007] Furthermore, the tilt angle of the swirl blades is 30°~40°; at least 12 blades are arranged circumferentially; and the projected area of ​​a number of the swirl blades on the horizontal plane is greater than or equal to the cross-sectional area of ​​the swirl dust removal section.

[0008] Furthermore, the diameter of the through hole is 7-10 cm.

[0009] Furthermore, a water-cooling jacket is also provided on the outer wall of the graphite quenching section.

[0010] The beneficial effects of this utility model are:

[0011] First: The quenching dust removal tower of this application has a two-section structure with the upper part being a graphite quenching section and the lower part being a cyclone dust removal section; it can both cool down quickly and remove dust; the exhaust gas in the graphite quenching section is cooled down from 550° to 70°, effectively inhibiting the regeneration of dioxins; after the exhaust gas in the cyclone dust removal section is cooled down and washed by multiple sprays, the temperature is reduced to about 60°, and the silica and other substances in the exhaust gas are also washed into the hydrochloric acid. The cooled exhaust gas enters the subsequent equipment, and the dust-containing spray liquid can be recovered as hydrochloric acid solution after pressure filtration.

[0012] Second: The structure is vertical, compact, occupies little space, and is easy to install and pipe.

[0013] Third: The cyclone plate has a relatively simple structure, is easy to maintain and replace, has high durability and wide applicability, and can separate impurities in the exhaust gas with high separation efficiency. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model.

[0015] Figure 2This is a schematic diagram of the swirl plate structure.

[0016] In the diagram: 10 is the emergency water tank, 20 is the cooling device, 30 is the rapid cooling dust removal tower, 31 is the graphite rapid cooling section, 31.1 is the air inlet, 32 is the cyclone dust removal section, 32.1 is the recovery chamber, 32.2 is the air outlet, 33 is the rapid cooling spray device, 34 is the emergency spray device, 40 is the circulating pump, 50 is the spray cyclone device, 51 is the dust removal spray device, 52 is the cyclone plate, 52.1 is the cyclone blade, and 52.2 is the through hole. Detailed Implementation

[0017] The technical solutions in the embodiments of this utility model will now be clearly and completely described with reference to the accompanying drawings.

[0018] A rapid cooling dust removal device for treating chlorine-containing waste gas and waste liquid incineration tail gas includes an emergency water tank 10, a cooling device 20, and a rapid cooling dust removal tower 30. The rapid cooling dust removal tower 30 has an upper and lower interconnected structure, including an upper graphite rapid cooling section 31 and a lower cyclone dust removal section 32. A rapid cooling spray device 33 and an emergency spray device 34 are installed at the top of the graphite rapid cooling section 31, and the emergency spray device 34 is connected to the emergency water tank 10. An air inlet 31.1 is provided at the top of the side wall of the graphite rapid cooling section 31. The bottom of the cyclone dust removal section 32 is a recovery chamber 32.1, and an air outlet 32.2 is provided at the lower part of the side wall. The recovery chamber 32.1 is circulated... Pump 40 is connected to cooling device 20; at least three layers of identical spray cyclone devices 50 are arranged axially above the air outlet 32.2 in the cyclone dust removal section 32; the spray cyclone device 50 includes a dust removal spray device 51 and a cyclone plate 52 arranged below the dust removal spray device 51; the cyclone plate 52 includes several inclined cyclone blades 52.1, and the cyclone blades 52.1 are evenly distributed with through holes 52.2, and the several cyclone blades 52.1 are evenly arranged circumferentially along the central axis of the cyclone dust removal section 32; the outlet of the cooling device 20 is connected to the rapid cooling spray device 33 and each layer of dust removal spray device 51 respectively.

[0019] Furthermore, the cooling device 20 is existing technology and can be a cooling device such as a heat exchanger, which will not be described in detail here.

[0020] Furthermore, the rapid cooling spray device 33, the emergency spray device 34, and the dust removal spray device 51 mainly include a spray pipe and a spray head installed on the spray pipe. The spray head can be an atomizing spray head, which is existing technology and will not be described in detail here.

[0021] Furthermore, the graphite quenching section 31 is made of graphite, which can withstand high temperatures, while the cyclone dust collector section 32 can be made of fiberglass. The exhaust gas is rapidly cooled to about 70°C in the graphite quenching section 31, preventing high-temperature damage to the cyclone dust collector section 32. In addition, an emergency water tank 10 and an emergency spray device 34 are provided to deal with emergencies and to prevent high-temperature exhaust gas from directly impacting the fiberglass cyclone dust collector section 32.

[0022] Furthermore, the tilt angle of the swirl blades 52.1 is 30°~40°; at least 12 blades are arranged circumferentially; and the projected area of ​​a plurality of the swirl blades 52.1 on the horizontal plane is greater than or equal to the cross-sectional area of ​​the swirl dust removal section 32.

[0023] Furthermore, when the exhaust gas passes through the swirl plate 52, the swirl plate 52 forces the exhaust gas to rotate, causing dust and other impurities in the exhaust gas to be centrifuged outward. As the centrifugal force increases, the impurities gradually deposit in the peripheral area of ​​the swirl plate 52, forming a deposition zone, while the clean exhaust gas flows out from the central area of ​​the swirl plate 52.

[0024] Furthermore, the diameter of the through hole 52.2 is 7-10 cm.

[0025] Furthermore, a water-cooling jacket (not shown in the figure) is also provided on the outer wall of the graphite quenching section 31.

[0026] The working principle of this application is as follows:

[0027] The graphite quenching section 31 adopts an integral graphite tower (non-lined) and water-cooled jacket cooling structure. The spray heads in the quenching spray device 33 and the emergency spray device 34 can also be made of graphite material. By using a large volume of water for atomized spraying, the exhaust gas can be fully contacted with the water mist, effectively reducing the exhaust gas temperature and fully absorbing the HCl in the exhaust gas.

[0028] The exhaust gas enters the cyclone dust collector section 32. After at least three spray cooling and washing processes, the silica in the exhaust gas is washed into the hydrochloric acid solution. The cooled and purified exhaust gas then enters subsequent equipment through the outlet 32.2. The spray liquid is pressurized by the circulating pump 40 and enters the cooling device 20. After cooling in the cooling device 20, the spray liquid is divided into at least four streams. One stream is sent to the rapid cooling spray device 33, and the remaining three streams are sent to the dust removal spray device 51. During the circulation of the spray liquid, the hydrochloric acid concentration gradually increases, so a certain concentration of hydrochloric acid solution can be recovered subsequently.

[0029] The described embodiments are merely some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

Claims

1. A rapid cooling dust removal device for treating incineration tail gas containing chlorine waste gas and waste liquid, characterized in that: The system includes an emergency water tank (10), a cooling device (20), and a rapid cooling dust removal tower (30). The rapid cooling dust removal tower (30) has an interconnected structure, including an upper graphite rapid cooling section (31) and a lower cyclone dust removal section (32). A rapid cooling spray device (33) and an emergency spray device (34) are installed at the top of the graphite rapid cooling section (31), and the emergency spray device (34) is connected to the emergency water tank (10). An air inlet (31.1) is provided at the top of the side wall of the graphite rapid cooling section (31). The bottom of the cyclone dust removal section (32) is a recovery chamber (32.1), and an air outlet (32.2) is provided at the lower part of the side wall. The recovery chamber (32.1) is connected to the cooling water tank (10) by a circulating pump (40). The cooling device (20) is connected; at least three layers of identical spray swirl devices (50) are arranged axially above the air outlet (32.2); the spray swirl device (50) includes a dust removal spray device (51) and a swirl plate (52) arranged below the dust removal spray device (51); the swirl plate (52) includes several inclined swirl blades (52.1), and through holes (52.2) are evenly distributed on the swirl blades (52.1). The several swirl blades (52.1) are evenly arranged circumferentially along the central axis of the swirl dust removal section (32); the outlet of the cooling device (20) is connected to the rapid cooling spray device (33) and each layer of dust removal spray device (51).

2. The quenching dust removal device for treating chlorine-containing waste gas and waste liquid incineration tail gas according to claim 1, characterized in that: The tilt angle of the swirl blades (52.1) is 30°~40°; at least 12 blades are arranged circumferentially; the projected area of ​​a number of the swirl blades (52.1) on the horizontal plane is greater than or equal to the cross-sectional area of ​​the swirl dust removal section (32).

3. The quenching dust removal device for treating chlorine-containing waste gas and waste liquid incineration tail gas according to claim 1, characterized in that: The diameter of the through hole (52.2) is 7-10cm.

4. The rapid cooling dust removal device for treating chlorine-containing waste gas and waste liquid incineration tail gas according to claim 1, characterized in that: The outer wall of the graphite quenching section (31) is also provided with a water-cooling jacket.

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