CN-120900386-B - Be applied to fluorine chemical industry denitration dioxin tail gas treatment integrated device

CN120900386BCN 120900386 BCN120900386 BCN 120900386BCN-120900386-B

Abstract

The invention discloses an integrated device applied to the treatment of fluorochemical denitration dioxin tail gas, which relates to the technical field of fluorochemical denitration dioxin tail gas treatment, and specifically comprises a regulation cabin, an ultra-rapid quenching cabin, a dynamic spraying mechanism, a catalytic reaction cabin and a dust removal cabin, wherein the cabins are sequentially communicated, and a high-temperature flue gas inlet is formed in the side wall of the regulation cabin; according to the invention, dynamic and accurate spraying control is completed, HF or SO2 concentration is monitored in real time based on a concentration detection probe, a mixing arm is driven to be lifted by adjusting the rotating speed of a coil, a linkage material control plate slides, the opening degree of a nozzle is controlled, the spraying amount and the pollutant concentration of slaked lime or polyaluminium chloride are dynamically matched, the occurrence of the problem of catalyst blockage caused by excessive spraying is avoided, the reaction efficiency of a honeycomb catalyst unit and flue gas is influenced, meanwhile, the problem that the nozzle is blocked and does not discharge is synchronously solved along with vibration in the rotating process of the mixing arm, and the long-term stable operation of a system is ensured.

Inventors

ZHOU YIJUN
JIANG CHUNJIAN
ZHOU SHUHUA
WU LEI
WEI ZHEN
JIANG XUEWEI

Assignees

江苏绿景环保设备有限公司

Dates

Publication Date: 20260512
Application Date: 20250721

Claims (4)

1. The utility model provides an be applied to fluorine chemical industry denitration dioxin tail gas treatment integrated device, includes regulation and control cabin (1), ultrafast quenching cabin (3), dynamic injection mechanism (4), catalytic reaction cabin (5) and dust removal cabin (6), and each cabin communicates in proper order, its characterized in that, high temperature flue gas import (2) has been seted up to regulation and control cabin (1) lateral wall; The super rapid quenching cabin is characterized in that a dynamic injection mechanism (4) is arranged at the top of the super rapid quenching cabin (3), the dynamic injection mechanism (4) comprises an adsorption cabin (401), a charging barrel (402) and a nozzle (404), the adsorption cabin (401) is fixed at the top of the super rapid quenching cabin (3), the charging barrel (402) is fixed on an inner wall support of the adsorption cabin (401), the nozzle (404) is uniformly communicated with the side wall of the charging barrel (402), an injector (406) is correspondingly arranged in the charging barrel (402) and positioned at the side of the nozzle (404), and a concentration detection probe (18) is arranged on the bulkhead of the adsorption cabin (401); The catalytic reaction device is characterized in that a catalytic reaction cabin (5) is arranged at the top of the adsorption cabin (401), a second plate frame (10) is fixed on the inner wall of the catalytic reaction cabin (5), a drawing plate (11) is connected to the second plate frame (10) in a sliding manner, a honeycomb catalyst unit (12) is arranged in the drawing plate (11), a dust removal cabin (6) is fixed at the top of the catalytic reaction cabin (5), a first plate frame (8) is fixed on the inner wall of the dust removal cabin (6), PTFE (polytetrafluoroethylene) coated filter bags (9) are uniformly arranged on the first plate frame (8), and a purified flue gas outlet (7) is formed in the side wall of the dust removal cabin (6) in a communicating manner; The dynamic spraying mechanism (4) further comprises a coil (403) and a material control plate (405), the top of the charging barrel (402) is movably connected with the coil (403) through a bearing, the material control plate (405) is arranged at the top of the nozzle (404), and the material control plate (405) penetrates through one side of the top of the nozzle (404) and is in sliding connection with the inner wall of the nozzle (404); The spiral tube (403) is sleeved with a movable connection spiral sleeve (13), the outer wall of the spiral tube (403) is connected with a sliding sleeve (14) in a sliding manner, the sliding sleeve (14) is movably connected with the bottom of the spiral sleeve (13), the bottom of the sliding sleeve (14) is uniformly provided with a connecting rod, and the connecting rod is correspondingly connected with a feeding control board (405) of the nozzle (404); The outer wall of the coil (403) is uniformly and rotatably connected with a mixing arm (15), the end part of the mixing arm (15) is fixedly provided with a lifting ball (16), the mixing arm (15) is provided with a connecting rod, and one end of the connecting rod is rotatably connected with the outer wall of the rotating sleeve.
2. The integrated device for treating the tail gas of the fluorochemical denitration dioxin is characterized in that an atomization spraying sleeve (20) is arranged on the outer wall of the ultra-fast quenching chamber (3), and the atomization spraying sleeve (20) is positioned in the ultra-fast quenching chamber (3), is uniformly provided with atomization nozzles and is distributed in an annular array.
3. The integrated device for treating the tail gas of the fluorochemical denitration dioxin is applied to the fluorochemical denitration according to claim 2, wherein a storage tank (19) is arranged on the outer wall of an adsorption cabin (401) on the dynamic spraying mechanism (4), a material guide pipe (17) is communicated with the storage tank (19), one end of the material guide pipe (17) penetrates through a coil (403) and extends into a material cylinder (402), a movable shaft is arranged on the outer wall of the adsorption cabin (401), and a gear at the end part of the movable shaft is meshed with a gear at the end part of the coil (403).
4. The integrated device for treating the tail gas of the fluorochemical denitration dioxin, according to claim 3, is characterized in that the method for treating the tail gas of the fluorochemical denitration dioxin comprises the following steps: Precisely spraying ammonia water or urea solution into a flue in front of an inlet of a high-temperature flue gas inlet (2), then entering an ultra-fast quenching cabin (3), rapidly cooling high-temperature flue gas from a incinerator or a reactor to a target catalytic reaction temperature of 220-280 ℃, and after the high-temperature flue gas inlet (2) enters the flue, enabling compressed air and water to be atomized cooperatively by the ultra-fast quenching cabin (3), wherein the particle size of water drops is less than 50 mu m, and spraying the water drops into the flue gas to finish flue gas cooling; According to the real-time concentration of hydrofluoric acid or sulfur dioxide in the flue gas detected by the concentration detection probe (18), the rotating speed of an outer motor is controlled, the rotating height of a mixing arm (15) on a coil (403) is adjusted, a material control plate (405) is driven to slide on the inner side of a nozzle (404), an ejector (406) is matched for working, the spraying amount of polyaluminum chloride or slaked lime is dynamically adjusted, and meanwhile powdered activated carbon is sprayed into the flue gas after the deacidification section is finished; And then the flue gas enters a honeycomb catalyst unit (12) on a contact pumping plate (11) in a catalytic reaction cabin (5), the reacted flue gas enters a dust removal cabin (6), dust carried in the flue gas, deacidification reaction products, sprayed powdery active carbon and pollutants adsorbed by the powdery active carbon are captured by a PTFE coated filter bag (9), and the flue gas is discharged into a chimney from a purified flue gas outlet (7) side.

Description

Be applied to fluorine chemical industry denitration dioxin tail gas treatment integrated device Technical Field The invention relates to the technical field of fluorochemical denitration dioxin tail gas treatment, in particular to an integrated device applied to fluorochemical denitration dioxin tail gas treatment. Background In the process of fluoride production, high-temperature pyrolysis, fluorination reaction and byproduct treatment links of fluorine-containing organic matters can generate high-toxicity tail gas with complex components, and main pollutants comprise nitrogen oxides, dioxin substances, hydrogen fluoride, particulate matters and the like, wherein the nitrogen oxides serve as key precursors for forming acid rain and photochemical smog, and form serious threat to ecological environment and human respiratory systems; The dioxin-like substances are used as the representative of persistent organic pollutants, have extremely strong bioaccumulation, cancerogenicity and endocrine disruptivity, have obvious risks even if the toxicity equivalent concentration is as low as 0.1ngTEQ/Nm 3, and particularly, have strong corrosiveness and catalyst toxicity when being widely existed in the fluoride flue gas, irreversibly destroy the active components of the catalyst and obviously shorten the service life of treatment facilities. In recent years, as a brand-new scheme, the ceramic catalytic filter tube technology is used for coating a catalyst on the surface of a filter tube to realize the integration of dust removal, denitration and dioxin removal, and a representative scheme, such as GoreDeNOx catalytic filter bags, can realize the excellent performance of the particulate matter <5mg/Nm 3、NOx＜30mg/Nm3 in the improvement of a steel sintering machine, and particularly, the synchronous removal of NOx and dioxin pollutants is realized by arranging a cooperative reactor in the patent of the invention with the publication number of CN 109647190A; However, HF existing in the flue gas is easy to react with a catalyst carrier, for example, tiO 2 existing in the catalyst and reacting HF generate TiF 4, which results in structural collapse of the catalyst, and by setting a deacidification mechanism, the problem of mismatching of HF concentration and deacidification materials in the flue gas easily occurs, so that unreacted deacidification materials cover the catalyst, and subsequent reaction is affected. Disclosure of Invention The invention aims to provide an integrated device applied to the treatment of fluorochemical denitration dioxin tail gas, which is used for solving the problems in the background technology. In order to achieve the aim, the invention provides the technical scheme that the integrated device for treating the tail gas of the denitration dioxin applied to the fluorine chemical industry comprises a regulation cabin, an ultra-rapid quenching cabin, a dynamic spraying mechanism, a catalytic reaction cabin and a dust removal cabin, wherein the cabins are sequentially communicated; The high-temperature flue gas inlet is formed in the side wall of the regulation cabin, the dynamic spraying mechanism is arranged at the top of the ultra-fast quenching cabin and comprises an adsorption cabin, a charging barrel and a nozzle, the adsorption cabin is fixed at the top of the ultra-fast quenching cabin, the charging barrel is fixed on a bracket on the inner wall of the adsorption cabin, the nozzle is uniformly communicated and arranged on the side wall of the charging barrel, the sprayer is correspondingly arranged in the charging barrel and positioned at the side of the nozzle, and the concentration detection probe is arranged on the wall of the adsorption cabin; The catalytic reaction cabin is installed at the top of adsorption cabin, catalytic reaction cabin inner wall is fixed with grillage two, sliding connection has the board of taking out on the grillage two, and takes out the inboard honeycomb catalyst unit that is provided with of board, catalytic reaction cabin top is fixed with the dust removal cabin, dust removal cabin inner wall is fixed with grillage one, evenly install PTFE tectorial membrane filter bag on the grillage one, the intercommunication has been seted up to the lateral wall of dust removal cabin and has been purified flue gas export. Furthermore, an atomization spraying sleeve is arranged on the outer wall of the ultra-fast quenching cabin, and atomization nozzles are uniformly arranged in the ultra-fast quenching cabin for spraying and distributed in an annular array. Further, the dynamic spraying mechanism further comprises a coil and a material control plate, the top of the charging barrel is movably connected with the coil through a bearing, the material control plate is arranged at the top of the nozzle, and the material control plate penetrates through one side of the top of the nozzle and is in sliding connection with the inner wall of the nozzle. Further, the swing joint has