CN207271024U

CN207271024U - Plasma NOXAdsorption equipment

Info

Publication number: CN207271024U
Application number: CN201720942409.4U
Authority: CN
Inventors: 王芳; 赵志龙; 黄羽飞; 杨晓松; 周连碧
Original assignee: Beijing General Research Institute of Mining and Metallurgy
Current assignee: Beijing General Research Institute of Mining and Metallurgy
Priority date: 2017-07-31
Filing date: 2017-07-31
Publication date: 2018-04-27
Anticipated expiration: 2027-07-31

Abstract

The utility model discloses a plasma NO_XAn adsorption apparatus comprising: the device comprises a metal discharge tube (3), a corona wire (4), an alternating-current high-voltage power supply (5) and a grounding wire (6); a purification bin (2) for containing an acid gas adsorbent is arranged in the metal discharge tube (3); the corona wire (4) is arranged in the purifying bin (2) through an insulating support, the corona wire (4) is electrically connected with an alternating current high-voltage power supply (5) arranged outside the metal discharge tube (3), the metal discharge tube (3) is electrically connected with a grounding wire (6), and an electric field is formed between the metal discharge tube (3) and the corona wire (4). The utility model has compact structure, small occupied area and high NO content_xRealizing high-efficiency removal.

Description

A kind of plasma NOXAdsorption plant

Technical field

It the utility model is related to technical field of air pollution control, more particularly to a kind of plasma NO_XAdsorption plant.

Background technology

In Chemical Manufacture, nitric acid production, nitrifying process, explosive production, metal surface nitric acid treatment etc. use nitric acid Production technology has NO_xWith the discharge of the materials such as nitric acid mist；Such as：Many enterprises of nonferrous smelting industry pickling, acid it is molten, Nitric acid can be largely used in leaching process, this generates higher concentration NO_x, and with intermittent discharge characteristics.Intermittence is discharged Higher concentration NO_xAdministered, investment is small, stable, the lower-cost Dry Adsorption technique of maintenance operation is with very strong Advantage.

At present, for higher concentration NO_xDry Adsorption technique mainly merely using activated carbon carry out physical absorption, though this To NO_xWith certain adsorption cleaning efficiency, but the problem of slowly discharged there are acid gas, and for other acid contaminants Purification efficiency is very low.In view of the above problems, occurs the absorption that some physical adsorption and chemical adsorptions are combined in the prior art Agent, such as：Publication No. is to disclose a kind of absorbent for removal of various acidic gases in the Chinese patent of CN85105415A, it is By alkaline earth metal hydroxide, alumino-silicate and activated carbon by weight percentage 20~30:40~60:3~30 compositions, can A variety of acid gas are adsorbed, but the adsorbent is there are the problems such as the rate of adsorption is relatively low, the adsorbent replacement cycle is short, and to NO The high NO of content_xTreatment effect is poor.In addition, Dry Adsorption device structure of the prior art is loose, takes up a large area, it is difficult to Realize higher concentration NO_xEffectively removing.

The content of the invention

For above-mentioned shortcoming of the prior art, the utility model provides a kind of plasma NOX adsorption plants, It is not only compact-sized, floor space is small, but also can be high to NO contents NO_xRealize efficient removal.

The purpose of this utility model is achieved through the following technical solutions：

A kind of plasma NO_XAdsorption plant, including：Metal discharge pipe 3, corona wire 4, ac high voltage source 5 and ground connection Line 6；The cleaning position 2 being internally provided with for holding acid gas adsorption agent of metal discharge pipe 3；Corona wire 4 passes through insulating support In cleaning position 2, and corona wire 4 is electrically connected with the ac high voltage source 5 outside metal discharge pipe 3, and metal is put Fulgurite 3 is electrically connected with ground wire 6, so as to form electric field between metal discharge pipe 3 and corona wire 4.

Preferably, one end of the metal discharge pipe 3 is gas access 1, and the other end is gas vent 7；The corona wire 4 Extend on the axis of the metal discharge pipe 3, and from gas access 1 to gas vent 7.

Preferably, the output voltage of the ac high voltage source 5 is 0~50Kv, peak point current is 0~200mA, pulse frequency Rate is 0~1000Hz.

Preferably, the ac high voltage source 5 is contact type voltage regulator, intermediate frequency power supply control cabinet or testing transformer.

Preferably, the cleaning position 2 is cylinder.

Preferably, the cleaning position 2 is multiple warehouses for being cascaded, or the multiple warehouses being connected in parallel.

The plasma that the utility model embodiment is provided it can be seen from above-mentioned technical solution provided by the utility model Body NO_XAdsorption plant is to organically combine alkaline adsorbent of the prior art and plasma technique, passes through plasma electricity Accelerate NO to NO from technology₂Etc. high-valence state conversion of nitrogen oxides, while by acid gas adsorption agent to NO₂Etc. high-valence state nitrogen oxygen Compound carries out physical absorption and/or chemisorbed, it is achieved thereby that the NO high to NO contents in exhaust gas_xCarry out efficient removal.Can See, the plasma NO that the utility model embodiment is provided_XAdsorption plant is not only compact-sized, floor space is small, Er Qieneng Enough NOs high to NO contents_xRealize efficient removal.

Brief description of the drawings

It is required in being described below to embodiment in order to illustrate more clearly of the technical solution of the utility model embodiment The attached drawing used is briefly described, it should be apparent that, drawings in the following description are only some implementations of the utility model Example, without creative efforts, can also be according to these attached drawings for those of ordinary skill in the art Obtain other accompanying drawings.

Fig. 1 provides plasma NO for the utility model embodiment_XThe structure diagram of adsorption plant.

Embodiment

With reference to the attached drawing in the utility model embodiment, the technical scheme in the embodiment of the utility model is carried out clear Chu, be fully described by, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole realities Apply example.Embodiment based on the utility model, those of ordinary skill in the art are obtained without making creative work The every other embodiment obtained, belongs to the scope of protection of the utility model.

Below to plasma NO provided by the utility model_XAdsorption plant is described in detail.

Embodiment 1

A kind of as shown in Figure 1, plasma NO_XAdsorption plant, its concrete structure can include：Metal discharge pipe 3, corona Line 4, ac high voltage source 5 and ground wire 6；The purification being internally provided with for holding acid gas adsorption agent of metal discharge pipe 3 Storehouse 2；Corona wire 4 is arranged in cleaning position 2 by insulating support, and corona wire 4 exchanges height with outside metal discharge pipe 3 Voltage source 5 is electrically connected, and metal discharge pipe 3 is electrically connected with ground wire 6, so as to be formed between metal discharge pipe 3 and corona wire 4 Electric field, that is, constitute the gas discharge device of line core structure.

Wherein, plasma NO_XEach component of adsorption plant can include embodiments below：

(1) the metal discharge pipe 3 can use polishing metal tube, and the corona wire 6 can use stainless steel metal wire, institute Stating insulating support can be made of polytetrafluoroethylene (PTFE).One end of metal discharge pipe 3 is gas access 1, and the other end is gas vent 7, corona wire 4 is located on the axis of the metal discharge pipe 3, and is extended from gas access 1 to gas vent 7, this contributes to Uniform electric field is formed along air-flow direction of advance between metal discharge pipe 3 and corona wire 4, with effective using the plasma produced Remove NO_X。

(2) output voltage of the ac high voltage source 5 is 0~50Kv, peak point current is 0~200mA, pulse frequency is 0~1000Hz.The ac high voltage source 5 can use contact type voltage regulator, intermediate frequency power supply control cabinet or testing transformer. In practical application, by accessing 220V power frequency supplies, can making the output voltage of contact type voltage regulator, (i.e. testing transformer is defeated Enter voltage) obtain required experiment high voltage.

(3) concrete form and size of the metal discharge pipe 3 and cleaning position 2 can depending on actual conditions, such as： Cleaning position 2 can be cylinder, or the multiple warehouses being cascaded, and can also be the multiple warehouses being connected in parallel. In practical application, cleaning position 2 is preferably identical with 3 shape of metal discharge pipe.

(4) the acid gas adsorption agent can be by alkaline earth metal hydroxide, alumino-silicate, activated carbon, bentonite etc. Alkaline adsorbent is prepared, but other also can be selected to NO_xThe adsorbent of Dry Adsorption effect is played, so as to realize to acid The physical absorption of property gas and/or chemisorbed.

Specifically, plasma NO provided by the utility model_XThe operation principle of adsorption plant is：Contain NO_XExhaust gas Cleaning position 2 is entered by the gas access 1 of metal discharge pipe 3, due to the interior shape between metal discharge pipe 3 and corona wire 4 of cleaning position 2 Into high field, therefore when the exhaust gas flows through the region of discharge of the high field, ac high-voltage rapid increase produces Highfield obtains high energy electron, makes the H in exhaust gas₂O、O₂Equimolecular is activated, ionizes, and produces the good oxidisability particle of activity, These active particles make the electrochemical reaction for equally being passed through a series of complex by the NO of corona discharge activation, are oxidized to NO₂And its The nitrogen oxides of his high-valence state, and the NO that these are oxidized to₂With it is original high in the nitrogen oxides and exhaust gas of other high-valence states Valence state nitrogen oxides can be cleaned acid gas adsorption agent physical absorption and/or chemisorbed in storehouse 2, it is achieved thereby that to useless The high NO of NO contents in gas_xCarry out efficient removal.Plasma NO_XNO of the adsorption plant to various concentrations_xIt is respectively provided with very high Treatment effeciency, to NO under identical experiment condition_XRemoval effect be much better than existing Dry Adsorption technology.

To sum up, the utility model embodiment is not only compact-sized, floor space is small, but also can be high to NO contents NO_xRealize efficient removal.

The above, is only the preferable embodiment of the utility model, but the scope of protection of the utility model is not This is confined to, any one skilled in the art can readily occur in the technical scope that the utility model discloses Change or replacement, should be covered within the scope of the utility model.Therefore, the scope of protection of the utility model should It is subject to the protection domain of claims.

Claims

A kind of 1. plasma NO_XAdsorption plant, it is characterised in that including：Metal discharge pipe (3), corona wire (4), ac high-voltage Power supply (5) and ground wire (6)；

The cleaning position (2) being internally provided with for holding acid gas adsorption agent of metal discharge pipe (3)；Corona wire (4) is by exhausted Edge branch is set up in cleaning position (2), and corona wire (4) and ac high voltage source (5) electricity arranged on metal discharge pipe (3) outside Connection, and metal discharge pipe (3) is electrically connected with ground wire (6), so as to be formed between metal discharge pipe (3) and corona wire (4) Electric field.
2. plasma NO according to claim 1_XAdsorption plant, it is characterised in that the one of the metal discharge pipe (3) It is gas vent (7) to hold as gas access (1), the other end；The corona wire (4) is located at the axis of the metal discharge pipe (3) On, and extended from gas access (1) to gas vent (7).
3. plasma NO according to claim 1 or 2_XAdsorption plant, it is characterised in that the ac high voltage source (5) Output voltage be 0~50Kv, peak point current is 0~200mA, pulse frequency is 0~1000Hz.
4. plasma NO according to claim 1 or 2_XAdsorption plant, it is characterised in that the ac high voltage source (5) For contact type voltage regulator, intermediate frequency power supply control cabinet or testing transformer.
5. plasma NO according to claim 1 or 2_XAdsorption plant, it is characterised in that the cleaning position (2) is circle Cylinder.
6. plasma NO according to claim 1 or 2_XAdsorption plant, it is characterised in that the cleaning position (2) is string The multiple warehouses being linked togather, or the multiple warehouses being connected in parallel.