CN-224207737-U - Multi-stage spray tower for tail gas purification

CN224207737UCN 224207737 UCN224207737 UCN 224207737UCN-224207737-U

Abstract

The utility model provides a tail gas purification multi-stage spray tower which comprises a tower body, three sets of circulating spray systems and a U-shaped communicating pipe. The tower body is hollow, two partition boards are arranged in the tower body to divide the tower body into an upper spray area, a middle spray area and a lower spray area, the top part is provided with an exhaust port, the bottom is provided with a tail gas input pipe. The three sets of circulating spraying systems are respectively arranged in three spraying areas, and are sequentially water spraying, alkaline solution spraying and oxidant solution spraying from bottom to top. The U-shaped communicating pipe is inverted in the partition plate, the input end is communicated with the lower side spraying area, the output end is communicated with the upper side and is arranged downwards, and the distance between the U-shaped communicating pipe and the partition plate is larger than 50cm. The tail gas enters the tower body through the tail gas input pipe, and is subjected to three-stage spray treatment in sequence, so that water-soluble pollutants, solid particles, acid gas and refractory pollutants are effectively removed, and purified gas is discharged from the exhaust port. The spray tower is designed through multi-stage spraying and unique communicating pipes, so that the purifying effect is improved.

Inventors

ZHAO JINLONG
Ling Yuyuan
LI WENQIANG
Zhong Anding

Assignees

江西铜鼓有色冶金化工有限责任公司

Dates

Publication Date: 20260508
Application Date: 20250523

Claims (7)

1. A multi-stage spray tower for purifying exhaust gas, characterized in that the multi-stage spray tower for purifying exhaust gas comprises: The tower body is designed in a hollow mode, two partition plates are arranged in the tower body, the tower body is divided into an upper spray area, a middle spray area and a lower spray area by the two partition plates, an exhaust port is arranged at the top of the tower body, and a tail gas input pipe is arranged at the bottom of the tower body; The three sets of circulating spraying systems are respectively arranged on the upper, middle and lower spraying areas, and are sequentially provided with water spraying, alkaline solution spraying and oxidant solution spraying from bottom to top; The U-shaped communicating pipe is arranged on the partition plate, the U-shaped communicating pipe is inverted, the input end of the U-shaped communicating pipe is communicated with the spraying area on the lower side of the partition plate, the output end of the U-shaped communicating pipe is communicated with the spraying area on the upper side of the partition plate, the output end of the U-shaped communicating pipe is downwards arranged, and the distance between the output end of the U-shaped communicating pipe and the partition plate is larger than 50cm.
2. The multi-stage spray tower for purifying exhaust gas according to claim 1, wherein the cyclic spray system comprises: The input end of the circulating pipeline is arranged at the bottom of the spraying area, and the output end of the circulating pipeline is arranged at the top of the spraying area; The atomizing nozzle is arranged at the output end of the circulating pipeline and is downwards arranged; And the circulating pump is arranged on the circulating pipeline.
3. The multi-stage spray tower for purifying exhaust gas according to claim 2, wherein: the input end of the circulating pipeline is provided with a filter screen.
4. The multi-stage spray tower for purifying exhaust gas according to claim 2, wherein: The output end of the circulating pipeline is of a circular ring structure, and the atomizing nozzles are uniformly distributed on the output end of the circulating pipeline.
5. The multi-stage spray tower for purifying exhaust gas according to claim 2, wherein: Still include the automatic mechanism that adds of medicament, the automatic mechanism that adds of medicament sets up in two in last circulation spray system's circulation pipeline, the automatic mechanism that adds of medicament includes medicament storehouse, ration valve, the pre-installation has the medicament in the medicament storehouse, the bottom export in medicament storehouse pass through the pipeline with circulation pipeline intercommunication, the ration valve set up in the medicament storehouse with on the pipeline of circulation pipeline intercommunication.
6. The multi-stage spray tower for purifying exhaust gas according to claim 1, wherein: The device also comprises a tail gas dispersing pipe, wherein the tail gas dispersing pipe is of a circular ring structure, outlets are uniformly distributed at the bottom of the tail gas dispersing pipe, and one end of the tail gas dispersing pipe is communicated with the tail gas input pipe or the output end of the U-shaped communicating pipe.
7. The multi-stage spray tower for purifying exhaust gas according to claim 1, wherein: And a demister is arranged on the exhaust port of the tower body.

Description

Multi-stage spray tower for tail gas purification Technical Field The utility model relates to the technical field of tail gas treatment, in particular to a tail gas purification multi-stage spray tower. Background In the industrial production process, various production devices can emit a large amount of tail gas containing pollutants, and the tail gas often contains harmful substances such as water-soluble pollutants, solid particles, acid gases (such as SO 2 and NOx), refractory pollutants (such as VOCs) and the like. If the tail gases are directly discharged into the atmosphere, the tail gases not only cause serious pollution to the air quality and influence the ecological environment and human health, but also possibly violate the related environmental regulations, thereby bringing legal risks and adverse social influence to enterprises. At present, tail gas purification treatment technology is continuously developed, wherein a spray tower is used as common tail gas purification equipment and is widely applied to the field of industrial tail gas treatment. However, most of the conventional spray towers adopt a single-stage spray mode, namely, only one spray area and one set of spray system are arranged, and the tail gas is treated by using a single type of spray liquid. The single-stage spraying mode has the limitation that as the spray liquid is single in type, various pollutants in the tail gas are difficult to remove simultaneously and effectively, so that the tail gas purifying effect is not ideal, the treated tail gas possibly still contains high-concentration harmful substances, and the increasingly strict environmental protection emission standard cannot be met. Disclosure of utility model The utility model aims to provide a multi-stage spray tower for purifying tail gas, which is used for solving the technical problem that the tail gas purifying effect of the traditional single-stage spray tower is poor. In order to achieve the above purpose, the utility model adopts the technical scheme that the tail gas purifying multi-stage spray tower comprises: The tower body is designed in a hollow mode, two partition plates are arranged in the tower body, the tower body is divided into an upper spray area, a middle spray area and a lower spray area by the two partition plates, an exhaust port is arranged at the top of the tower body, and a tail gas input pipe is arranged at the bottom of the tower body; The three sets of circulating spraying systems are respectively arranged on the upper, middle and lower spraying areas, and are sequentially provided with water spraying, alkaline solution spraying and oxidant solution spraying from bottom to top; The U-shaped communicating pipe is arranged on the partition plate, the U-shaped communicating pipe is inverted, the input end of the U-shaped communicating pipe is communicated with the spraying area on the lower side of the partition plate, the output end of the U-shaped communicating pipe is communicated with the spraying area on the upper side of the partition plate, the output end of the U-shaped communicating pipe is downwards arranged, and the distance between the output end of the U-shaped communicating pipe and the partition plate is larger than 50cm. In one embodiment, the cyclic spray system includes: The input end of the circulating pipeline is arranged at the bottom of the spraying area, and the output end of the circulating pipeline is arranged at the top of the spraying area; The atomizing nozzle is arranged at the output end of the circulating pipeline and is downwards arranged; And the circulating pump is arranged on the circulating pipeline. In one embodiment, a filter screen is provided on the input end of the circulation pipe. In one embodiment, the output end of the circulating pipeline is in a circular ring structure, and the atomizing nozzles are uniformly distributed on the output end of the circulating pipeline. In one embodiment, the automatic adding mechanism of medicament is arranged on the circulating pipelines of the two circulating spraying systems in the upper part, the automatic adding mechanism of medicament comprises a medicament bin and a quantitative valve, medicament is preloaded in the medicament bin, the bottom outlet of the medicament bin is communicated with the circulating pipeline through a pipeline, and the quantitative valve is arranged on the pipeline communicated with the circulating pipeline. In one embodiment, the device further comprises a tail gas dispersing pipe, wherein the tail gas dispersing pipe is of a circular ring structure, outlets are uniformly distributed at the bottom of the tail gas dispersing pipe, and one end of the tail gas dispersing pipe is communicated with the tail gas input pipe or the output end of the U-shaped communicating pipe. In one embodiment, a demister is arranged on the exhaust port of the tower body. The above-mentioned one or more technical solutions in the embodiments of the pr