CN203108413U - Oxynitride absorption device - Google Patents

Abstract

The utility model provides an oxynitride absorption device which consists of a gas jetting device, a liquid accumulating device and a reaction absorbing device. The device is divided into a gas jetting chamber, a liquid accumulating chamber, an absorption reaction chamber and a demisting chamber according to the characteristics, wherein the gas jetting chamber and the absorption reaction chamber are connected with the liquid accumulating chamber; the demisting chamber is installed at the upper end of the absorption reaction chamber; the gas jetting chamber is provided with a gas inlet and a circulating liquid inlet; the liquid accumulating chamber is internally provided with a circulating liquid level control port, a circulating pump connector, a liquid discharge port and a purifying port; the absorption reaction chamber is internally provided with a filler support frame, a filler, a circulating liquid spraying port and a nozzle; and the demisting chamber is internally provided with a screen gasket of a demisting device and a gas outlet. The oxynitride absorption device provided by the utility model has the advantages of good absorption effect, high filter precision, good effect in removing acidic mist entrained in gas, low investment and maintenance cost, small occupied area, energy saving, bio-environmental protection and the like, and is long in service life, stable in performance and strong in adaptability.

Description

Nitrogen oxide absorption device

technical field

The utility model belongs to the technical field of nitrogen oxide absorption and treatment, and is suitable for nitric acid industrial production, nitric acid loading system, and production industries where nitro is a raw material for nitrogen oxide absorption treatment, especially for nitrogen oxide absorption. Occasions with relatively large human hazards and industries with serious air pollution such as the environment. the

Background technique

Today's nitric acid industrial production, nitric acid loading system, and nitro as raw material production industry. It is extremely unstable in the production process and in the storage and transportation of concentrated nitric acid, and it is easy to decompose at room temperature. The decomposed nitrogen oxides condense rapidly in the air to form extremely small particles, which is manifested as a large amount of visible yellow smoke. These organic fumes are discharged into the air, which not only damages and corrodes the factory buildings, but also directly forms acid rain, and the ammonia nitrogen content in the water body exceeds the standard, causing serious pollution to the environment, and the human body has a great impact on occupational health after inhalation. the

Most of the existing technologies are aimed at the denitrification treatment of tail gas from large industrial boilers and nitric acid plants, etc., but there is no way to deal with sporadic and trace nitrogen oxide emissions. Catalytic reduction methods are all over-invested and extremely energy-consuming, which is not conducive to the promotion of treatment of small and medium-sized emission points. the

Utility model content

The purpose of the utility model is to solve the problem of nitric acid volatilization smoke, and further provide a nitrogen oxide absorption device with reasonable design structure, convenient operation, and good energy saving and environmental protection effect. the

In order to achieve the above object, the technical solution adopted by the utility model is as follows: the nitrogen oxide absorption device is characterized in that it is composed of three parts: a gas injection device, a liquid accumulation device, and a reaction absorption device, and according to their respective characteristics, the The equipment is divided into four working units: gas injection chamber, liquid accumulation chamber, absorption reaction chamber and demisting chamber. Both the gas injection chamber and the absorption reaction chamber are connected with the liquid accumulation chamber. The injection chamber is provided with an air inlet and a circulating fluid inlet; a circulating fluid liquid level control port, a circulating pump interface, a liquid discharge port and a clean discharge port are provided in the effusion chamber; a packing support frame, packing, and circulating fluid are provided in the absorption reaction chamber. The function of the filler is to prolong the residence time of the nitrogen oxide gas in the tower body; the demisting device wire mesh pad and the gas outlet are arranged in the demisting chamber. the

Its working method: relying on the instantaneous pressure difference of the Venturi tube, the external volatile acid mist gas is sucked into the tower body from the air inlet, and a part of the condensed acid mist droplets are deposited into the other part of the nitrogen oxide gas in the effusion chamber by their own weight. Nitric oxide is oxidized to nitrogen dioxide by the hydrogen peroxide solution sprayed from the spray port of the circulating fluid, and reacts with water to form nitric acid solution, which enters the liquid accumulation chamber, and the gas enters the reaction chamber from bottom to top, and in the absorption reaction chamber The unoxidized nitrogen oxide acid gas forms a reverse contact with the spray water mist (hydrogen peroxide solution), so that the nitrogen monoxide in most of the nitrogen oxides is completely oxidized to nitrogen dioxide, which is absorbed by water and then becomes a dilute nitric acid solution After entering the effusion chamber, the absorbed gas enters the demisting device (wire mesh pad), and is separated by the demisting (wire mesh pad) to separate the liquid acid mist entrained in the gas, and the separated clean gas passes through the outlet It is discharged from the outside of the tower body, and the absorbed liquid enters the liquid accumulation chamber by its own gravity. the

Compared with the existing catalytic reduction technology, the nitric acid mist absorption and treatment device of the utility model has good absorption effect, high filtration precision, and the effect of removing acid mist entrained in the gas in the practical application of nitric acid industrial production, nitric acid loading system, chemical fertilizer production and other industries. Good, low investment and maintenance costs, small footprint, energy saving, ecological environment protection, etc., and long service life, stable performance, and strong applicability. It is mainly aimed at the control of nitrogen oxides at small and medium-sized emission points and unorganized emission points. the

Description of drawings

Fig. 1 is a structural schematic diagram of a nitrogen oxide absorption device of the present invention. the

Detailed ways

Referring to Fig. 1, the nitrogen oxide absorption device of the present utility model is composed of three parts: a gas injection device, a liquid accumulation device, and a reaction absorption device, and the equipment is divided into a gas injection chamber B, a liquid accumulation chamber A, Absorption reaction chamber C, demister D four working units, gas injection chamber B and absorption reaction chamber C are connected to liquid accumulation chamber A, demist chamber D is installed on the upper end of absorption reaction chamber C, and gas injection chamber B is set There are Venturi injection device, air inlet N1 and circulating fluid inlet N8. The function of Venturi injection device is: 1. Wash gas acid mist and pollutants. 2. Utilize the instantaneous pressure difference generated by the change of Venturi throat to form a negative pressure, suck the nitrogen oxides from the outside into the tower body, so as to ensure that the polluted gas does not emerge from other openings; the function of the air inlet is to send the gas into the tower The circulation channel of the body, the inlet of the circulating fluid is to pump the circulating fluid in the liquid accumulation chamber into the injection chamber from the circulating pump to carry out preliminary oxidation and absorption of the acid mist gas containing nitrogen oxides; Control port N3, circulating pump interface N4, drain port N5 and drain port N6, among which, the function of circulating liquid level control is to display the level of circulating liquid in the effusion chamber so as to control when the drain port is opened, and the circulating pump The function of the interface is to send the circulating liquid in the liquid accumulation chamber into the N7 and N8 circulating liquid inlets to oxidize and absorb the acid mist gas containing nitrogen oxides, and the function of the liquid discharge port is to discharge the liquid when the liquid level control exceeds the range. Part of the circulating liquid in the liquid accumulation chamber is discharged out of the tower to keep the liquid level in the liquid accumulation chamber in a constant state. There are filler support frame, filler 3, circulating fluid spray port N7 and nozzle 2. The function of the filler bracket is to support the filler placed on it. The function of the filler 3 is to prolong the residence time of nitrogen oxide gas in the tower to ensure nitrogen The oxides can be fully oxidized and absorbed in the tower body. The function of the circulating liquid spray port N7 is that the circulating liquid sent by the circulating pump is sprayed into the tower body from the nozzle 2 to make reverse contact with the gas containing nitrogen oxides; D is equipped with demisting device wire mesh pad 1 and air outlet N2. The function of the wire mesh pad 1 of the demister device is to separate the acid mist droplets entrained in the gas after oxidation and absorption, and the function of the gas outlet N2 is to discharge the gas separated and purified by the demist device out of the tower body through this port . the

Claims (1)

1. nox adsorption device, it is characterized in that, formed by gas injection apparatus, hydrops device, reaction absorption plant three parts, according to feature separately successively equipment be divided into gas jet chamber (B), hydrops chamber (A), absorption reaction chamber (C), except four working cells, fog chamber (D), gas jet chamber (B) all is connected with hydrops chamber (A) with absorption reaction chamber (C), except fog chamber (D) is installed in upper end, absorption reaction chamber (C), wherein, gas jet chamber (B) is provided with air inlet (N1) and circulation fluid import (N8); Be provided with the control of circulation fluid liquid level mouthful (N3), circulating pump interface (N4), leakage fluid dram (N5) and discharging hole (N6) in the hydrops chamber (A); Be provided with filler bracing frame, filler (3), circulation fluid mouth spray (N7) and shower nozzle (2) in absorption reaction chamber (C), the effect of filler (3) is to prolong the time of staying of oxides of nitrogen gas in tower body; Be provided with demister mesh pad (1) and gas outlet (N2) except in the fog chamber (D).

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