CN102631839A - Denitration equipment for glass kiln - Google Patents
Denitration equipment for glass kiln Download PDFInfo
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- CN102631839A CN102631839A CN2012100782423A CN201210078242A CN102631839A CN 102631839 A CN102631839 A CN 102631839A CN 2012100782423 A CN2012100782423 A CN 2012100782423A CN 201210078242 A CN201210078242 A CN 201210078242A CN 102631839 A CN102631839 A CN 102631839A
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- tower tube
- denitration
- glass kiln
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Abstract
The invention discloses denitration equipment for a glass kiln, which comprises a tower mounted in a support. A waste gas inlet to be treated is arranged at the upper end of the tower and connected with a tail gas outlet of the glass kiln through a gas inlet pipe of a U-shaped structure, a static intercept layer is arranged in the gas inlet pipe between the tail gas outlet and the waste gas inlet, a gas inlet valve is arranged between the static intercept layer and the tail gas outlet, a grating layer is arranged on the upper portion of the tower, a plurality of catalyst denitration layers are arranged below the grating layer on the tower and disposed on the support in the tower, the support comprises at least two support layers for holding spare catalyst denitration layers, and a treated waste gas outlet is arranged on the lower portion of the tower and connected with secondary treatment equipment for tail gas through an exhaust pipe and an exhaust valve. By the aid of the equipment, more than 90% of NOx in waste gas exhausted from the glass kiln can be treated.
Description
Technical field
The present invention relates to a kind of industrial waste gas treatment facility, be specifically related to a kind of glass kiln denitration device.
Background technology
Aggravated the degradating trend of regional acid rain at present in the quick increase of China's nitrogen oxide emission.Result of study shows, the increase of nitrogen oxide emission make China's acid rain pollution by sulfuric acid type to sulfuric acid and the compound transformation of nitric acid, nitrate ion in acid rain proportion from 1/10 of the eighties in last century progressively rise in recent years 1/3.The atmospheric nitrogen oxide can influence the oxidisability of atmosphere, cause problems such as photochemical pollution, the increase of second particle thing, grey haze, arrived must improvement stage.
Glass furnace is the important component part of discharged nitrous oxides; Made number of research projects aspect the NO discharge capacity in reducing glass furnace waste gas both at home and abroad; And obtained impressive progress, the control measures of the NOx in the glass furnace waste gas roughly is divided into a measure and secondary measure.
(1) to the improvement of a measure of NOx
Strictness control is promptly carried out in the outstanding pollution sources control of a measure on the source that produces NO, the formation of restriction NO, and measure is following:
1. oxygen and aiding combustion is technological
The oxygen and aiding combustion technology comprises oxygen-enriched combusting and pure oxygen combustion technology, although the NO concentration of emission in the waste gas of glass furnace after adopting the oxygen and aiding combustion technology might increase, because the reduction significantly of toxic emission total amount, the NO growing amount can significantly reduce.Therefore, this technology is applied on the glass furnace (especially container glass kiln) of European countries.
2. stratified combustion
According to the flame combustion situation in the glass furnace, the combustion zone roughly can be divided into 2 districts, promptly is the high-temperature region (being the hot-zone) of oxidation state and is the low-temperature space (being the cold-zone) of going back ortho states.The effect of so-called stratified combustion mainly is to reduce the hot-zone temperature to reduce the growing amount of NO, when flame sprays, make progress simultaneously, in, multi-point injection down, under the effect of combustion air, form upper, middle and lower multilayer burning.According to French environment specialist's introduction, adopt after the stratified combustion, the NO in the ware glass kiln waste gas can reduce 30%～50%.
3. adopt low coefficient of excess air
Result of study shows: high temperature and excessive combustion air can cause the increase of NO growing amount, and adopting low coefficient of excess air is exactly to burn to reduce the NO growing amount in thermal-flame district with minimum superfluous air capacity.The glass furnace Lambda control software of Siemens exploitation just is being based on this principle, has begun on the glass furnace of European countries, to apply at present.
4. select low nitrogen spray gun for use
In recent years; For reducing the NO growing amount of glass furnace when burning; European countries have developed low nitrogen spray gun in succession; This spray gun mainly is through segmentation adding fuel or combustion air and the ignition temperature of each section is carried out strict control reduce the NO growing amount of glass furnace when burning, begun at present on the container glass kiln, to apply.
(2) NOx is carried out the after-treatment measure
The secondary measure is meant that the NO to having produced in the glass furnace waste gas handles, thus NOx concentration when reducing toxic emission and the discharge capacity of NOx, and measure is following:
1. 3R is technological
The implication of 3R is to react (Reaction) and reduction (Reduction) in regenerator (Rrgenerator) lining; This technology is developed by Britain MB Group Plc; Be characterized in adding hydrocarbon fuels such as natural gas, NOx in itself and the regenerator waste gas is reacted and generate the nitrogen and the steam of environmental sound, and this waste gas is had the burning of control to regenerator; Owing in regenerator, do not burn; Do not have overheated danger, can not cause scaling loss yet, and can make waste gas no longer remaining fuel gas when externally discharging checker.Result of study shows, removes the compared with techniques of NO with other, this technology can be applicable to simultaneously float glass furnace and container glass kiln have applied range, easy for operation, do not use chemicals, operating cost is low and except that advantages such as NO are effective.Employing should technology, and the NOx growing amount in the glass furnace waste gas can reduce more than 80%.Certain 700t/d float glass furnace adopt should technology after, the NOx concentration of emission in the waste gas is by 2200mg/Nm
3Dropped to 300mg/Nm
3Should technology begin to apply at present in European countries.
2. selective catalytic reduction (SCR method)
The SCR technology is in suitable temperature and have under the condition that catalyst exists through reducing agent (liquefied ammonia, ammoniacal liquor, urea); " selective " with flue gas in NOx reaction and generate the technology of nitrogen G&W, the core of SCR denitration technology is the optimal design of many uniform fields in catalyst and the equipment.Its key reaction formula is following:
(1)4NO+4NH
3+O
2→4N
2+6H
2O
(2)6NO+4NH
3→5N
2+6H
2O
(3)6NO
2+8NH
3→7N
2+12H
2O
(4)2NH
3+NO+NO
2→2N
2+3H
2O
Owing to adopted special catalyst, this method can be used at a lower temperature, and the exhaust-gas treatment temperature can be reduced to 250～450 ℃, and its efficient of removing NO can reach 80%～90%, but this method operating cost is higher.
3. on-catalytic selective reduction method (SNCR method)
On-catalytic selective reduction method is meant uses ammoniacal liquor (NH in waste gas treatment process
3) with the reduction of the NO in the glass furnace waste gas, generating the nitrogen and the steam of environmental sound, its main chemical equation is following:
(5)4NH
3+6NO→5N
2+6H
2O
Adopt the reaction temperature of this method higher, optimal reaction temperature is about 950 ℃, and its efficient that removes NO is lower than 3R technology and SCR method, but operating cost is lower, and also useful in recent years urea replaces the report that ammoniacal liquor is made reducing agent.
SCR technology (SCR) with plurality of advantages such as its denitration efficiency height, stable and reliable operation at home and abroad power industry obtained extensive use.At present, China's gas denitrifying technology and relevant policies also are in the exploratory stage.Domesticly built up or be the method construction of adopting a complete set of import or introducing SCR key technology and equipment basically in the large-scale denitration engineering of building; Not only investment and operating cost are high; And there is problems such as being difficult to adaptation,, do not see the successful case report so far yet especially at glass industry.Therefore, it is good to be necessary to design a kind of denitration effect, is convenient to actual drinking, lower-cost glass kiln denitration device.
Summary of the invention
The objective of the invention is to overcome the defective that exists in the prior art, a kind of glass furnace waste gas NO that is used for handling is provided
xEquipment, this equipment can be with the NO more than 90% in the glass furnace waste gas
xDispose.
For realizing above-mentioned purpose; Technical scheme of the present invention is a kind of glass kiln denitration device, it is characterized in that, said denitration device comprises the tower tube that is installed in the support; Be provided with pending exhaust gas inlet in the upper end of said tower tube; Said exhaust gas inlet is connected with the tail gas outlet of glass furnace through the air inlet pipe of U type structure, in said tail gas outlet to the air inlet pipe between the exhaust gas inlet, is provided with static intercept layer, between said static intercept layer and tail gas outlet, is provided with intake valve; Top at said tower tube is provided with grid layer; To have several catalyst denitration layers, said catalyst denitration layer is arranged on the support in the tower tube said tower tube at grid layer, and said support comprises the two-layer support that is used to place preparing catalyst denitration layer at least; Be provided with the exhaust outlet of handling back waste gas in the bottom of said tower tube, said exhaust outlet is connected with device of tail-gas secondary treatment through blast pipe and air bleeding valve.
In order to make denitration device in maintenance process, can not influence the ordinary production of glass furnace, optimized technical scheme is, between the rear end of the front end of said intake valve and air bleeding valve, is provided with the maintenance blast pipe, in said maintenance blast pipe, is connected in series normally close valve.When maintenance or removing tower tube inner catalyst denitration layer, need be with intake valve and exhaust valve closure, the normally close valve that will overhaul in the blast pipe is simultaneously opened, and during tower tube maintenance process, makes glass shake middle waste gas of discharging and directly manages the blast pipe discharge through maintenance.
Because the catalyst in the catalyst denitration layer in use for some time can be blocked or be lost efficacy; Therefore need clear up or reduce processing to catalyst denitration layer; Further optimized technical scheme is; Said support is connected with the inwall of tower tube, on said support, is provided with slide rail, and said catalyst denitration layer is a disk-like structure; Catalyst denitration layer bottom at said disk-like structure is provided with slide block or the roller that cooperates with said slide rail, and said tower tube is provided with the hatch door that is used for the turnover of catalyst denitration layer at the corresponding site of catalyst denitration layer.
For the ease of to the cleaning of catalyst denitration layer or change operation, further optimized technical scheme also has, and said support is equipped with operating platform at every layer of hatch door position, is arranged on 2～3 layer operation platforms below the said support and also extends and be connected on the blast pipe.
For the ease of to the cleaning of catalyst denitration layer or change operation, further optimized technical scheme also has, and on said operating platform, is provided with to be used to clear up or the driving mechanism of moving catalyst denitration layer.
In order to reduce the area of each layer catalyst denitration layer; Increase the flow velocity that is processed waste gas; Be convenient to simultaneously the cleaning of catalyst denitration layer is changed, further optimized technical scheme also has, and in said tower tube, is provided with six layers of support; Four layers of catalyst denitration layer are housed on described six layers of support, and two-layer in addition support is subsequent use shelf layer.
For the fibrous NO that can glass will be discharged
xMaterial tentatively stops processing, thereby alleviates the treating capacity of waste gas in catalyst denitration layer, prolongs the service life and the clearance time of glass kiln denitration device; Further optimized technical scheme also has; Described static intercept layer is horizontally disposed steelframe network structure, and said steelframe network structure is the grid net, or is the honeycomb graticule mesh; Or be the square hole net, or be the circular hole net.
For the air-flow that gets into the tower tube is evenly distributed on the catalyst denitration aspect, optimized technical scheme also has, and described grid layer is the pectination steel frame construction.
For the ease of using, reduce the switch of intake valve and air bleeding valve and regulate number of times, optimized technical scheme also has, and said intake valve and air bleeding valve are valve open in usual.
For the ease of cleaning accumulate in the tower tube with blast pipe in dust, optimized technical scheme also has, and is provided with the taper ash bucket in the bottom of said tower tube, below said blast pipe, is provided with the ash discharge gate, said gate is connected with driving mechanism.
Advantage of the present invention and beneficial effect are: this glass kiln denitration device is provided with static intercept layer through being arranged on several catalyst denitration layers in the tower tube in air inlet pipe, have the equipment of this structure, can be with the NO that contains in the waste gas of discharging in the glass stove
x, drain more than 90%.And this equipment have simple to operate, long service life, advantage such as the denitration processing cost is cheap, and energy consumption is low, and floor space is little.
Description of drawings
Fig. 1 is a glass kiln denitration device plan structure sketch map of the present invention;
Fig. 2 is that the A-A of Fig. 1 is to view;
Fig. 3 is that the B-B of Fig. 1 is to view;
Fig. 4 is the plan view of static intercept layer among Fig. 1;
Fig. 5 is the plan view of grid layer among Fig. 1.
Among the figure: 1, support; 2, tower tube; 3, exhaust gas inlet; 4, air inlet pipe; 5, tail gas outlet; 6, static intercept layer; 7, intake valve; 8, grid layer; 9, catalyst denitration layer; 10, support; 11, preparing catalyst denitration layer; 12, exhaust outlet; 13, blast pipe; 14, air bleeding valve; 15, maintenance blast pipe; 16, normally close valve; 17, hatch door; 18, operating platform; 19, driving mechanism; 20, taper ash bucket; 21, ash discharge gate; 22, driving mechanism.
The specific embodiment
Below in conjunction with accompanying drawing and embodiment, specific embodiments of the invention further describes.Following examples only are used for technical scheme of the present invention more clearly is described, and can not limit protection scope of the present invention with this.
Extremely shown in Figure 3 like Fig. 1; The present invention is a kind of glass kiln denitration device; This denitration device comprises the tower tube 2 that is installed in the support 1, is provided with pending exhaust gas inlet 3 in the upper end of tower tube 2, and exhaust gas inlet 3 is connected with the tail gas outlet 5 of glass furnace through the air inlet pipe 4 of U type structure; Be provided with static intercept layer 6 in the air inlet pipe 4 between said tail gas outlet 5 to exhaust gas inlet 3; Between static intercept layer 6 and tail gas outlet 5, be provided with intake valve 7, be provided with grid layer 8 on the top of tower tube 2, tower tube 2 at grid layer 8 to have several catalyst denitration layers 9; Catalyst denitration layer 9 is arranged on the support 10 in the tower tube 1, and support 10 comprises the two-layer support that is used to place preparing catalyst denitration layer 11 at least; Be provided with the exhaust outlet 12 of handling back waste gas in the bottom of tower tube 1, said exhaust outlet 12 is connected with device of tail-gas secondary treatment through blast pipe 13 and air bleeding valve 14.
Among the present invention in order to make denitration device in maintenance process, can not influence the ordinary production of glass furnace; Embodiment preferred is; Between the rear end of the front end of intake valve 7 and air bleeding valve 14, be provided with maintenance blast pipe 15, serial connection normally close valve 16 in said maintenance blast pipe 15.When maintenance or removing tower tube inner catalyst denitration layer; Need intake valve 7 and air bleeding valve 14 be closed; The normally close valve 16 that will overhaul simultaneously in the blast pipe 15 is opened, and during tower tube 2 maintenance processes, makes glass shake middle waste gas of discharging directly through 15 discharges of maintenance pipe blast pipe.
In the present invention since the catalyst in the catalyst denitration layer 9 in use for some time can be blocked or lost efficacy; Therefore need clear up or reduce processing to catalyst denitration layer; Further optimized technical scheme is; The inwall of support 10 with tower tube 2 is connected, on support 10, is provided with slide rail, catalyst denitration layer 9 is a disk-like structure; Bottom at the catalyst denitration layer 9 of said disk-like structure is provided with slide block or the roller that cooperates with slide rail, and tower tube 2 is provided with the hatch door 17 that is used for 9 turnover of catalyst denitration layer at the corresponding site of catalyst denitration layer 9.
In the present invention for the ease of cleaning or replacing operation to catalyst denitration layer; Further preferred embodiment also has; Support 10 is equipped with operating platform 18 at every layer of hatch door 17 positions, is arranged on 3 layer operation platforms 18 below the support 10 and also extends and be connected on the blast pipe 15.
For the ease of to the cleaning of catalyst denitration layer 9 or change operation, further preferred embodiment also has in the present invention, on operating platform 18, is provided with to be used to clear up or the driving mechanism 19 of moving catalyst denitration layer 9.
In the present invention in order to reduce the area of each layer catalyst denitration layer; Increase the flow velocity that is processed waste gas; Be convenient to simultaneously the cleaning of catalyst denitration layer is changed, further preferred embodiment also has, and in tower tube 2, can be provided with six layers of support 10; Four layers of catalyst denitration layer 9 are housed on six layers of support 10, and two-layer in addition support 10 is subsequent use shelf layer.
Fibrous NO in order can glass to be discharged in the present invention
xMaterial tentatively stops processing, thereby alleviates the treating capacity of waste gas in catalyst denitration layer, prolongs the service life and the clearance time of glass kiln denitration device; Further preferred embodiment also has; Static intercept layer 6 is horizontally disposed steelframe network structure, and this steelframe network structure can be the grid net, or is the honeycomb graticule mesh; Or be the square hole net, or be the circular hole net.
For the air-flow that gets into the tower tube is evenly distributed on the catalyst denitration aspect, embodiment preferred also has in the present invention, and grid layer 8 is the pectination steel frame construction, or shutter, wherein the adjustable angle of blinds.
For the ease of using, reduce the switch of intake valve and air bleeding valve and regulate number of times in the present invention, embodiment preferred also has, and intake valve 7 is a valve open in usual with air bleeding valve 14.
In the present invention for the ease of cleaning accumulate in the tower tube with blast pipe in dust, embodiment preferred also has, and is provided with taper ash bucket 20 in the bottom of tower tube 2, below blast pipe 15, is provided with ash discharge gate 21, said gate 21 is connected with driving mechanism 22.
The above only is a preferred implementation of the present invention; Should be pointed out that for those skilled in the art, under the prerequisite that does not break away from know-why of the present invention; Can also make some improvement and retouching, these improvement and retouching also should be regarded as protection scope of the present invention.
Claims (10)
1. glass kiln denitration device; It is characterized in that; Said denitration device comprises the tower tube that is installed in the support, is provided with pending exhaust gas inlet in the upper end of said tower tube, and said exhaust gas inlet is connected with the tail gas outlet of glass furnace through the air inlet pipe of U type structure; In said tail gas outlet to the air inlet pipe between the exhaust gas inlet, be provided with static intercept layer; Between said static intercept layer and tail gas outlet, be provided with intake valve, be provided with grid layer on the top of said tower tube, said tower tube at grid layer to have several catalyst denitration layers; Said catalyst denitration layer is arranged on the support in the tower tube, and said support comprises the two-layer support that is used to place preparing catalyst denitration layer at least; Be provided with the exhaust outlet of handling back waste gas in the bottom of said tower tube, said exhaust outlet is connected with device of tail-gas secondary treatment through blast pipe and air bleeding valve.
2. glass kiln denitration device as claimed in claim 1 is characterized in that, between the rear end of the front end of said intake valve and air bleeding valve, is provided with the maintenance blast pipe, in said maintenance blast pipe, is connected in series normally close valve.
3. glass kiln denitration device as claimed in claim 2; It is characterized in that; Said support is connected with the inwall of tower tube, on said support, is provided with slide rail, and said catalyst denitration layer is a disk-like structure; Catalyst denitration layer bottom at said disk-like structure is provided with slide block or the roller that cooperates with said slide rail, and said tower tube is provided with the hatch door that is used for the turnover of catalyst denitration layer at the corresponding site of catalyst denitration layer.
4. glass kiln denitration device as claimed in claim 3 is characterized in that said support is equipped with operating platform at every layer of hatch door position, is arranged on 2～3 layer operation platforms below the said support and also extends and be connected on the blast pipe.
5. glass kiln denitration device as claimed in claim 4 is characterized in that, on said operating platform, is provided with to be used to clear up or the driving mechanism of moving catalyst denitration layer.
6. glass kiln denitration device as claimed in claim 5 is characterized in that, in said tower tube, is provided with six layers of support, and four layers of catalyst denitration layer are housed on described six layers of support, and two-layer in addition support is subsequent use shelf layer.
7. glass kiln denitration device as claimed in claim 1 is characterized in that, described static intercept layer is horizontally disposed steelframe network structure, and said steelframe network structure is the grid net, or is the honeycomb graticule mesh, or is the square hole net, or is the circular hole net.
8. glass kiln denitration device as claimed in claim 1 is characterized in that described grid layer is the pectination steel frame construction.
9. glass kiln denitration device as claimed in claim 1 is characterized in that said intake valve and air bleeding valve are valve open in usual.
10. glass kiln denitration device as claimed in claim 1 is characterized in that, is provided with the taper ash bucket in the bottom of said tower tube, below said blast pipe, is provided with the ash discharge gate, and said gate is connected with driving mechanism.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100782423A CN102631839A (en) | 2012-03-23 | 2012-03-23 | Denitration equipment for glass kiln |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100782423A CN102631839A (en) | 2012-03-23 | 2012-03-23 | Denitration equipment for glass kiln |
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| Publication Number | Publication Date |
|---|---|
| CN102631839A true CN102631839A (en) | 2012-08-15 |
Family
ID=46616521
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012100782423A Pending CN102631839A (en) | 2012-03-23 | 2012-03-23 | Denitration equipment for glass kiln |
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| Country | Link |
|---|---|
| CN (1) | CN102631839A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4305236C1 (en) * | 1993-02-20 | 1994-08-11 | Atzger Juergen | Appliance for generating an ammonia-laden stream of hot air |
| CN101601965A (en) * | 2009-07-24 | 2009-12-16 | 华电环保系统工程有限公司 | The ammonia-spraying grid device of SCR method denitrating flue gas, and SCR method flue-gas denitration process |
| CN202021014U (en) * | 2011-04-12 | 2011-11-02 | 北京洛卡环保技术有限公司 | System for removing nitric oxide from boiler flue gas |
| CN202621021U (en) * | 2012-03-23 | 2012-12-26 | 江苏亿金环保科技股份有限公司 | Denitration equipment for glass kiln |
-
2012
- 2012-03-23 CN CN2012100782423A patent/CN102631839A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4305236C1 (en) * | 1993-02-20 | 1994-08-11 | Atzger Juergen | Appliance for generating an ammonia-laden stream of hot air |
| CN101601965A (en) * | 2009-07-24 | 2009-12-16 | 华电环保系统工程有限公司 | The ammonia-spraying grid device of SCR method denitrating flue gas, and SCR method flue-gas denitration process |
| CN202021014U (en) * | 2011-04-12 | 2011-11-02 | 北京洛卡环保技术有限公司 | System for removing nitric oxide from boiler flue gas |
| CN202621021U (en) * | 2012-03-23 | 2012-12-26 | 江苏亿金环保科技股份有限公司 | Denitration equipment for glass kiln |
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Application publication date: 20120815 |