CN105327602A - Floating glass melting furnace flue gas waste heat utilization and denitration purification treatment device - Google Patents
Floating glass melting furnace flue gas waste heat utilization and denitration purification treatment device Download PDFInfo
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- CN105327602A CN105327602A CN201510630522.4A CN201510630522A CN105327602A CN 105327602 A CN105327602 A CN 105327602A CN 201510630522 A CN201510630522 A CN 201510630522A CN 105327602 A CN105327602 A CN 105327602A
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Abstract
The invention relates to a floating glass melting furnace flue gas waste heat utilization and denitration purification treatment device including a waste heat boiler, a desulfurization tower connected with the waste heat boiler, and a dust remover connected with the desulfurization tower; the waste heat boiler is internally provided with an inner baffle plate for dividing the waste heat boiler into a first hot section and a second hot section; an inlet of the first hot section is connected with a glass melting furnace flue gas discharge port, an outlet of the first hot section is connected with a denitration reactor, and an outlet of the denitration reactor is connected with an inlet of the second hot section; an outlet of the waste heat boiler is connected with an inlet at the bottom of the desulfurization tower, an outlet at the top of the desulfurization tower is connected with the desulfurization dust remover, and the desulfurization dust remover is connected with a chimney through a draught fan. The waste heat boiler is divided into the first hot section and the second hot section by the inner baffle plate, the first hot section and the second hot section can be connected or cut off, and heat exchange is carried out in the waste heat boiler according to different temperatures of flue gas, and thus waste heat utilization is completed; the temperature of the flue gas entering the denitration reactor can be reduced through the waste heat boiler, so as to avoid the temperature of the flue gas in the denitration reactor from being too high and avoid the denitration efficiency from being affected.
Description
Technical field
The present invention relates to a kind of float glass smelting kiln flue gas processing device, especially a kind of float glass smelting kiln fume waste heat utilizes and denitration purifying processing device.
Background technology
The comparatively general desulfur technology of the sector application such as current power, chemical industry is wet method (lime-gypsum method), there are obvious pluses and minuses in the method: a, desulfuration efficiency high (desulfurization degree is up to 95%), but system easily produces the phenomenons such as burn into blocking, operation is comparatively complicated, and maintenance workload is larger.B, whole system material are in pulpous state, all easily fouling of slurrying and spray system, demister, blocking, complex process, and system management, maintenance cost are higher.C, system complex, floor space is comparatively large, and disposable investment is relatively large.D, desulfurizing byproduct can fully utilize, but gypsum qualitt is lower, and its comprehensive utilization is without advantage.E, bring secondary pollution, later stage waste water treatment process is complicated, increases investment, operation cost.F, wet processing are to SO
3removal efficiency low, the flue after desulfurization and chimney must carry out preservative treatment.G, wet method device outlet temperature only about 50 DEG C, the wet flue gas of discharge easily produces white cigarette, poor visual effect under low-temperature condition.If will eliminate completely " white cigarette ", need by flue gas to more than 100 DEG C.Arranging smoke re-heater (GGH) also can only make the flue gas near chimney breast not produce condensation, and " white cigarette " is formed in place far away.But the condensate water of the wet flue gas of smoke stack emission may be formed " chimney rain " in chimney surrounding area, affects the environmental quality in some areas.The start and stop of h, lime stone-gypsum wet sulfur removal technology comparatively bother, and the time of needs is longer, cannot adapt to kiln load variations situation fast, and must safeguard when system does not put into operation.I, heavy metal remove problem.The removal efficiency of wet desulphurization heavy metal only has 10% ~ 30%, and the heavy metal removed enters in waste water, also needs to process heavy metal in waste water, and the heavy metal do not removed is discharged along with flue gas.
Current domestic float glass industry employs the pluralities of fuels such as heavy oil, natural gas, petroleum coke, coal gas, biogas, and the flue gas characteristic that different fuel generates makes a big difference.Different glass enterprises is from the cost consideration of region fuel supply difference, local policy factor and enterprise, the fuel type adopted glass melter pluralities of fuel collocation simultaneously that is different, that even have uses, cause the flue gas characteristic variation of glass melter, therefore, for having, the process of a class flue gas is domestic to be studied always, one is obtain waste gas purification process by kiln waste heat gas Appropriate application simultaneously, but fails to find out suitable treatment process, realizes the qualified discharge of pollutant.By to smoke components as SO
2, NO
x, flue dust detection analysis, find that its architectural characteristic is very complicated, wherein flue dust has very strong moisture absorption and acidity, significantly improves the acid dew-point temperature of flue gas, for treatment facility seriously corroded, causes general dust removal process technique directly to process.
Summary of the invention
The object of this invention is to provide a kind of float glass smelting kiln fume waste heat to utilize and denitration purifying processing device, utilize waste heat boiler segmentation to realize used heat height and distribute, ensure denitration efficiency.
The invention provides a kind of float glass smelting kiln fume waste heat to utilize and denitration purifying processing device, in Benitration reactor, soot blower system is set, prevent catalyst from adhering to and cause the problem that catalyst module blocks, flue gas easily condenses.
The invention provides a kind of float glass smelting kiln fume waste heat to utilize and denitration purifying processing device, adopt semi-dry desulphurization, the structure of innovation desulfurizing tower, adopts Venturi tube principle, heat transfer between strengthening gas-solid and mass transfer, realize the control of desulfurization temperature and exhaust emissions temperature, the control of bed pressure drop.
The invention provides a kind of float glass smelting kiln fume waste heat to utilize and denitration purifying processing device, carry out after gas solid separation through deduster, the thin ash of collection and reactant mixture return desulfurizing tower and react further, improve the utilization rate of desulfurization absorbent.
The technical solution adopted for the present invention to solve the technical problems is: a kind of float glass smelting kiln fume waste heat utilizes and denitration purifying processing device, comprise waste heat boiler, connect the deduster of the desulfurizing tower of waste heat boiler and connection desulfurizing tower, waste heat boiler inside is provided with Internal baffle and waste heat boiler is separated into a hot arc and two hot arcs, one hot arc import connects flue gas of glass melting furnace outlet, one hot arc outlet is connected with Benitration reactor, and the outlet of Benitration reactor connects two hot arc imports; The outlet of waste heat boiler connects the bottom inlet of desulfurizing tower, and the top exit of desulfurizing tower connects desulfurizing dust-collector, and desulfurizing dust-collector connects chimney by blower fan.Waste heat boiler is separated into a hot arc and two hot arcs by Internal baffle, can be communicated with or cut off between a hot arc with two hot arcs, and the different temperatures according to flue gas carries out heat exchange in waste heat boiler, completes Waste Heat Reuse; The temperature of the flue gas entering Benitration reactor can be reduced by waste heat boiler, prevent the flue-gas temperature that enters in Benitration reactor too high, affect denitration efficiency; Internal baffle is according to the temperature regime of former flue gas, and the exhaust gas volumn controlled in waste heat boiler between a hot arc and two hot arcs is distributed, and ensures the temperature of denitration reaction, thus realizes NOx qualified discharge.
As preferably, the import of Benitration reactor is also connected with flue gas of glass melting furnace outlet, and the outlet of Benitration reactor is also connected with the import of a hot arc.The flue-gas temperature that glass melter is discharged is lower, require no a hot arc but directly enter in Benitration reactor and show, the reacted flue-gas temperature of Benitration reactor is also higher, and used heat has value, then again can enter into a hot arc and carry out Waste Heat Reuse.
As preferably, the air flue that one hot arc connects flue gas of glass melting furnace outlet is provided with valve one, the air flue that Benitration reactor connects flue gas of glass melting furnace outlet is provided with valve two, the air flue that one hot arc outlet connects Benitration reactor is provided with valve three, and the air flue of Benitration reactor outlet connection one hot arc and two hot arcs is respectively arranged with valve four and valve five; All valves all have controller to control, and controller is connected with temperature sensor, and temperature sensor is arranged at flue gas of glass melting furnace outlet place.Controller controls opening and closing or the aperture size of each valve, thus control flue gas stay to.
As preferably, be reducing shape between waste heat boiler one hot arc and two hot arcs, Internal baffle is arranged at the position of reducing; Described Internal baffle adopts resistant to elevated temperatures flap valve or push-pull valve.The reducing shape flue gas changed between waste heat boiler one hot arc and two hot arcs circulates situation, controls the Waste Heat Reuse of waste heat boiler in a hot arc and two hot arcs, thus the temperature of the flue gas entered in Benitration reactor is controlled in conjunction with Internal baffle.
As preferably, the upper end of Benitration reactor is provided with bending downward air inlet pipe, and import is in the bottom of air inlet pipe, and the lower end of Benitration reactor is provided with the escape pipe of horizontal curvature, and outlet is in the outer end of escape pipe; The inside of the vertical flue of Benitration reactor is provided with some ammonia-spraying grids, and vertical flue is separated into independently Pen An community by ammonia-spraying grid, and ammonia-spraying grid connects spray ammonia device.Each community distributes several nozzles, ensures the uniformity of ammonia distributed rendering and the adjustability of ammonia density distribution.
As preferably, in the straight flue of Benitration reactor, each Pen An community is provided with catalyst module, and each catalyst module top is provided with blowing pipe.Each catalyst module all arranges blowing pipe, blows gray technology in conjunction with pipe network or rake is blown gray technology or manually blows gray technology, effectively solve the difficult problem that catalyst module easily blocks, flue dust easily condenses, the stability of Enhanced SC R denitration reaction.Catalyst module mounting platform, by 4 layers of design, installs 2 ~ 3 layers, and along with the lengthening of running time, catalyst activity reduction, when denitration rate and the escaping of ammonia rate can not meet the demands, can increase catalyst layer for subsequent use or change raw catelyst layer.
As preferably, in the air inlet pipe of Benitration reactor and escape pipe, be provided with deflector and expansion joint.
As preferably, the import of desulfurizing tower is arranged at the bottom of desulfurizing tower, and the import of desulfurizing tower adopts Venturi tube, and the outlet of desulfurizing tower is arranged at the top of desulfurizing tower, and the outlet of desulfurizing tower docks deduster downwards along the sidewall of desulfurizing tower.Enter in the flue gas of desulfurizing tower and be entrained with absorbent and Desulphurization, through the import of desulfurizing tower bottom venturi tube structure, due to Venturi effect, be subject to the acceleration of air-flow and suspend, form fierce turbulence state, make to have very large relative slip velocity between particle with flue gas, particle reaction cross section constantly rubs, collides renewal, thus greatly enhance heat transfer between gas-solid, mass transfer, reach optimal reaction temperature simultaneously.Water spray cooling system can be increased in desulfurizing tower, make flue-gas temperature be cooled to about 75 DEG C.
As preferably, desulfurizing dust-collector also docks muffler with desulfurizing tower top, and the thin ash that desulfurizing dust-collector is collected and reactant mixture cooled via return air pipe return desulfurizing tower and form backpulsing absorbent covering structure.The thin ash collected and reactant mixture can be returned desulfurizing tower by backpulsing absorbent covering structure, reduce the consumption of absorbent.
As preferably, flue gas of glass melting furnace outlet is also direct-connected with chimney, direct-connected air flue is provided with valve six.
The invention has the beneficial effects as follows: waste heat boiler is separated into a hot arc and two hot arcs by Internal baffle, can be communicated with or cut off between a hot arc with two hot arcs, the different temperatures according to flue gas carries out heat exchange in waste heat boiler, completes Waste Heat Reuse; The temperature of the flue gas entering Benitration reactor can be reduced by waste heat boiler, prevent the flue-gas temperature that enters in Benitration reactor too high, affect denitration efficiency.
Accompanying drawing explanation
Fig. 1 is a kind of structural representation of the present invention;
Fig. 2 is the side view of a kind of waste heat boiler of the present invention;
In figure: 1, glass melter, 2, air inlet pipe, 3, Benitration reactor, 4, straight flue, 5, chimney, 6, blower fan, 7, desulfurizing dust-collector, 8, desulfurizing tower, 9, Venturi tube, 10, waste heat boiler, 11, a hot arc, 12, two hot arcs, 13, escape pipe, 14, Internal baffle.
Detailed description of the invention
Below by specific embodiment, and by reference to the accompanying drawings, technical scheme of the present invention is described in further detail.
Embodiment: a kind of float glass smelting kiln fume waste heat utilizes and denitration purifying processing device (see Fig. 1), comprise waste heat boiler 10, connect the desulfurizing dust-collector 7 of the desulfurizing tower 8 of waste heat boiler and connection desulfurizing tower, waste heat boiler inside is provided with Internal baffle 14 and waste heat boiler is separated into hot arc 11 and two hot arcs 12, one hot arc import connects glass melter 1 flue gas discharge opening, one hot arc outlet is connected with Benitration reactor 3, and the outlet of Benitration reactor connects two hot arc imports; The outlet of waste heat boiler connects the bottom inlet of desulfurizing tower, and the top exit of desulfurizing tower connects desulfurizing dust-collector, and desulfurizing dust-collector connects chimney 5 by blower fan 6.
The import of Benitration reactor is also connected with flue gas of glass melting furnace outlet, and the outlet of Benitration reactor is also connected with the import of a hot arc.Flue gas of glass melting furnace outlet is also direct-connected with chimney.The air flue that one hot arc connects flue gas of glass melting furnace outlet is provided with valve one, the air flue that Benitration reactor connects flue gas of glass melting furnace outlet is provided with valve two, the air flue that one hot arc outlet connects Benitration reactor is provided with valve three, the air flue of Benitration reactor outlet connection one hot arc and two hot arcs is respectively arranged with valve four and valve five, the air flue of the direct-connected flue gas of glass melting furnace outlet of chimney arranges valve six.All valves all have controller to control, and controller is connected with temperature sensor, and temperature sensor is arranged at flue gas of glass melting furnace outlet place.
Waste heat boiler (participation Fig. 2) is reducing shape between a hot arc and two hot arcs, and Internal baffle is arranged at the position of reducing, and described Internal baffle adopts resistant to elevated temperatures flap valve or push-pull valve, and such as: valve body selects 15CrMoV material, driving shaft selects 40Cr material.
The upper end of Benitration reactor is provided with bending downward air inlet pipe 2, and import is in the bottom of air inlet pipe, and the lower end of Benitration reactor is provided with the escape pipe 13 of horizontal curvature, and outlet is in the outer end of escape pipe; The inside of the vertical flue of Benitration reactor 4 is provided with some ammonia-spraying grids, and vertical flue is separated into independently Pen An community by ammonia-spraying grid, and ammonia-spraying grid connects spray ammonia device.In the straight flue of Benitration reactor, each Pen An community is provided with catalyst module, and each catalyst module top is provided with blowing pipe.Deflector and expansion joint is provided with in the air inlet pipe of Benitration reactor and escape pipe.
The import of desulfurizing tower is arranged at the bottom of desulfurizing tower, and the import of desulfurizing tower adopts Venturi tube 9, and the outlet of desulfurizing tower is arranged at the top of desulfurizing tower, and the outlet of desulfurizing tower docks desulfurizing dust-collector downwards along the sidewall of desulfurizing tower.Desulfurizing dust-collector also docks muffler with desulfurizing tower top, and the thin ash that desulfurizing dust-collector is collected and reactant mixture cooled via return air pipe return desulfurizing tower and form backpulsing absorbent covering structure.
When flue-gas temperature is enough high (more than 420 DEG C), Internal baffle is closed, valve-off two, valve four and valve six, open valve one, valve three and valve five, waste heat boiler one hot arc is directly entered from flue gas of glass melting furnace outlet flue gas out, after a hot arc cooling, (temperature reaches less than 420 DEG C) enters Benitration reactor, and return two hot arcs, the low-temperature outlet finally by waste heat boiler two hot arc enters desulfurizing tower and desulfurizing dust-collector.When flue-gas temperature is low (less than 350 DEG C), for controlling denitration reaction temperature (310 DEG C ~ 380 DEG C), ensureing denitration efficiency, valve-off one, valve three, valve five and valve six, open valve two and valve four, flue gas directly enters Benitration reactor, enter waste heat boiler one hot arc (UTILIZATION OF VESIDUAL HEAT IN) after denitration again, enter two hot arcs through Internal baffle, then enter desulfurizing tower and desulfurizing dust-collector by low-temperature outlet.As moderate in flue-gas temperature (350 ~ 400 DEG C), then partial fume enters Benitration reactor after waste heat boiler, and partial fume directly enters Benitration reactor.
Each catalyst module all arranges blowing pipe, gray technology is blown or rake is blown gray technology or manually blows gray technology in conjunction with pipe network, it is a purging unit that pipe network blows ash with one or half catalyst module, blowing medium adopts purification of compressed air, and above catalyst module, uniform layout purges pipe network.Soot blower system is controlled by PLC, and whole system adopts batch operation mode, namely behind system purge region (as 5S), suspends a period of time (as 3S), to ensure that buffering air accumulator has enough supply gas pressures.Carrying out practically and time out are by relay switch start, and by monitoring buffering reservoir pressure, when pressure is less than a certain numerical value (as 0.3MPa), system halt operation, relay is normally closed relay.By regulating compressed air pressure, the parameter such as coutroi velocity, flow, the purging effect under observation and comparison different situations, determine that pressure when purging should lower than 0.55Mpa.
The blowing medium that rake blows gray technology changes compressed air into, and supporting F type blowing nozzle, by nozzle, air-flow is accelerated, increase and purge intensity, promote and blow grey effect.Its Operation and control of rake soot blower improved is consistent with conventional rake soot blower.
The flue gas that glass melter is discharged enters desulfurizing tower after UTILIZATION OF VESIDUAL HEAT IN, denitration, reacts after Venturi tube bottom desulfurizing tower is accelerated with the calcium hydroxide, circulating ash and the water that add, the SO in removing flue gas
2, SO
3, HCl, HF, heavy metal etc.The flue gas carrying a large amount of absorbent and product is advanced into desulfurizing dust-collector downwards from desulfurizing tower top side, and the dust content after gas solid separation is no more than 30mg/Nm
3.The flue gas carrying a large amount of absorbent and product is advanced into desulfurizing dust-collector downwards from desulfurizing tower top side, carries out gas solid separation, and the dust content after gas solid separation is no more than 30mg/Nm
3.In order to reduce the consumption of absorbent, the thin ash that major part is collected and reactant mixture cooled via return air pipe return desulfurizing tower and react further.
Above-described embodiment is a kind of preferred version of the present invention, not does any pro forma restriction to the present invention, also has other variant and remodeling under the prerequisite not exceeding the technical scheme described in claim.
Claims (10)
1. a float glass smelting kiln fume waste heat utilizes and denitration purifying processing device, comprise waste heat boiler, connect the deduster of the desulfurizing tower of waste heat boiler and connection desulfurizing tower, it is characterized in that waste heat boiler inside is provided with Internal baffle and waste heat boiler is separated into a hot arc and two hot arcs, one hot arc import connects flue gas of glass melting furnace outlet, one hot arc outlet is connected with Benitration reactor, and the outlet of Benitration reactor connects two hot arc imports; The outlet of waste heat boiler connects the bottom inlet of desulfurizing tower, and the top exit of desulfurizing tower connects desulfurizing dust-collector, and desulfurizing dust-collector connects chimney by blower fan.
2. float glass smelting kiln fume waste heat according to claim 1 utilizes and denitration purifying processing device, and it is characterized in that the import of Benitration reactor is also connected with flue gas of glass melting furnace outlet, the outlet of Benitration reactor is also connected with the import of a hot arc.
3. float glass smelting kiln fume waste heat according to claim 2 utilizes and denitration purifying processing device, it is characterized in that the air flue of a hot arc connection flue gas of glass melting furnace outlet is provided with valve one, the air flue that Benitration reactor connects flue gas of glass melting furnace outlet is provided with valve two, the air flue that one hot arc outlet connects Benitration reactor is provided with valve three, and the air flue of Benitration reactor outlet connection one hot arc and two hot arcs is respectively arranged with valve four and valve five; All valves all have controller to control, and controller is connected with temperature sensor, and temperature sensor is arranged at flue gas of glass melting furnace outlet place.
4. float glass smelting kiln fume waste heat according to claim 1 utilizes and denitration purifying processing device, and it is characterized in that between waste heat boiler one hot arc and two hot arcs being reducing shape, Internal baffle is arranged at the position of reducing; Described Internal baffle adopts resistant to elevated temperatures flap valve or push-pull valve.
5. float glass smelting kiln fume waste heat according to claim 1 utilizes and denitration purifying processing device, it is characterized in that the upper end of Benitration reactor is provided with bending downward air inlet pipe, import is in the bottom of air inlet pipe, the lower end of Benitration reactor is provided with the escape pipe of horizontal curvature, and outlet is in the outer end of escape pipe; The inside of the vertical flue of Benitration reactor is provided with some ammonia-spraying grids, and vertical flue is separated into independently Pen An community by ammonia-spraying grid, and ammonia-spraying grid connects spray ammonia device.
6. float glass smelting kiln fume waste heat according to claim 5 utilizes and denitration purifying processing device, and it is characterized in that the straight flue of Benitration reactor each Pen An community interior is provided with catalyst module, each catalyst module top is provided with blowing pipe.
7. float glass smelting kiln fume waste heat according to claim 5 or 6 utilizes and denitration purifying processing device, it is characterized in that being provided with deflector and expansion joint in the air inlet pipe of Benitration reactor and escape pipe.
8. float glass smelting kiln fume waste heat according to claim 1 utilizes and denitration purifying processing device, it is characterized in that the import of desulfurizing tower is arranged at the bottom of desulfurizing tower, the import of desulfurizing tower adopts Venturi tube, the outlet of desulfurizing tower is arranged at the top of desulfurizing tower, and the outlet of desulfurizing tower docks desulfurizing dust-collector downwards along the sidewall of desulfurizing tower.
9. float glass smelting kiln fume waste heat according to claim 8 utilizes and denitration purifying processing device, it is characterized in that desulfurizing dust-collector also docks muffler with desulfurizing tower top, the thin ash that desulfurizing dust-collector is collected and reactant mixture cooled via return air pipe return desulfurizing tower and form backpulsing absorbent covering structure.
10. the float glass smelting kiln fume waste heat according to claim 1 or 2 or 3 or 4 or 5 or 8 utilizes and denitration purifying processing device, it is characterized in that flue gas of glass melting furnace outlet is also direct-connected with chimney, direct-connected air flue is provided with valve six.
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| CN107096378A (en) * | 2017-04-27 | 2017-08-29 | 湖南锐取环保科技有限公司 | The flue gas desulphurization system and sulfur method of a kind of floatation glass production line |
| CN107703875A (en) * | 2017-11-03 | 2018-02-16 | 四川省达州钢铁集团有限责任公司 | One kind eliminates white cigarette control system and method |
| CN108421383A (en) * | 2018-04-03 | 2018-08-21 | 中国联合工程有限公司 | A kind of acid washing rolled steel exhaust gas defluorinate denitrification apparatus and its operation method |
| CN109289519A (en) * | 2018-10-29 | 2019-02-01 | 海南中航特玻材料有限公司 | A kind of denitrating flue gas purification process |
| CN113546512A (en) * | 2020-04-24 | 2021-10-26 | 山东大明消毒科技有限公司 | Glass kiln denitration treatment device and denitration treatment process |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113546512A (en) * | 2020-04-24 | 2021-10-26 | 山东大明消毒科技有限公司 | Glass kiln denitration treatment device and denitration treatment process |
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| CN105327602B (en) | 2018-05-11 |
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