CN217220674U - Float glass tin bath waste gas purification recovery and energy recycling system - Google Patents
Float glass tin bath waste gas purification recovery and energy recycling system Download PDFInfo
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- CN217220674U CN217220674U CN202220581982.8U CN202220581982U CN217220674U CN 217220674 U CN217220674 U CN 217220674U CN 202220581982 U CN202220581982 U CN 202220581982U CN 217220674 U CN217220674 U CN 217220674U
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Abstract
The utility model discloses a float glass molten tin bath waste gas purification retrieves and energy system of recycling is the cyclic utilization system of connection between molten tin bath exhaust outlet and molten tin bath protection gas inlet house steward, its characterized in that, this system is including heat recovery unit, dust remover, cooler, compressor, desulfurization deoxidation device, deoxidation after cooler, drying device, accurate dust remover, the gas pitcher that mixes of establishing ties in proper order, wherein: and the waste gas outlet of the tin bath is communicated with the heat recovery device, and the gas outlet of the gas mixing tank is communicated with the tin bath protection gas inlet main pipe. The system purifies the tin bath waste gas to obtain high-purity nitrogen, hydrogen mixed gas and high-temperature steam, the high-purity nitrogen and hydrogen mixed gas returns to the tin bath to realize cyclic utilization, the high-temperature steam can be used for heat preservation and the like of a glass kiln heavy oil pipeline, other waste water and waste residues are not generated in the whole process, the pressure and temperature influence on the tin bath is low, the utilization rate of protective gas is effectively improved, the pollution is reduced, the system is simple in structure, the cost is saved, and the operation is simple.
Description
Technical Field
The utility model relates to a float glass production field, concretely relates to waste gas purification retrieves and energy system of recycling of float glass molten tin bath protective gas.
Background
The glass industry is a high energy consumption industry, and during the period of fourteen five, the state will continue to promote energy conservation and emission reduction actions in major industries such as flat glass and the like. Wherein, the recycling of the waste gas of the tin bath protective gas of the float glass becomes a feasible way.
The float glass is formed by filling with protective gas (N) 2 +H 2 ) In a protective gas of N 2 The content of H accounts for 92 to 95 percent of the total volume 2 5 to 8 percent. In addition, oxygen, sulfur and its compounds, water vapor, carbon dioxide, dust and particles, etc. in the shielding gas are harmful components, and their presence lowers the overall purity of the shielding gas and causes defects to the float glass, thus being strictly limited. Generally requiring O therein 2 、SO 2 +CO 2 The content of the component (A) is not more than 10ppm, and the dew point is not higher than-60 ℃.
Fresh shielding gas enters from the top of the tin bath, and waste gas mixed with pollutants (such as tin ash, sulfide, oxygen, water vapor and the like) is discharged from exhaust ports at the front end and the rear end of the tin bath. Through detection, the effective component (namely N) in the waste gas discharged by the tin bath is found 2 +H 2 ) The content is still very high and reaches more than 98 percent. In the prior art, the gas is totally dissipated into the air, which not only pollutes the environment, but also causes serious waste of resources.
In the Chinese patent application publication CN104291554A 'polluted gas discharge device for float glass tin bath', the waste gas from the tin bath is led out, and after cooling and dust removal, the waste gas containing combustible gas is ignited and burned. The process can solve the defects of environmental pollution and combustible gas aggregation caused by direct emission of waste gas, and simultaneously can recycle SnO powder. However, the process also has the following disadvantages: 1) substances such as tin ash and the like can be condensed in the cooling pipeline, so that the pipeline is easy to block; 2) the tin bath waste gas with recycling value is burnt, which causes resource waste.
In the chinese patent application publication CN111389178A "an adsorption purification treatment recovery device for tin bath waste gas of float glass", the tin bath waste gas is introduced into an adsorption cooling tank with a coolant circulation system, impurities such as tin ash, sulfide, etc. in the waste gas directly contact with water to be cooled and adsorbed, and the purified nitrogen-hydrogen gas is diluted by compressed air and then evacuated. The process can effectively reduce the content of tin ash and sulfide discharged into the air, and can recover the tin ash, but still has the following defects: 1) the nitrogen and hydrogen gas is directly discharged without realizing recycling; 2) the cooling of the high-temperature gas at 500-1200 ℃ inevitably causes a large amount of water vapor to be discharged along with the purified nitrogen-hydrogen gas, so that the waste of water resources is caused; 3) the process will add an additional part of the cost of sewage treatment.
In chinese patent CN203429050U "a device that can recycle the internal gas mixture of molten tin bath", introduce processing system with molten tin bath waste gas, return the molten tin bath after cooling, dust removal, desulfurization, deoxidization again, this technology can realize the recovery of molten tin bath gas, has reduced the emission of waste gas, nevertheless this design still has the defect: 1) the heat of the high-temperature gas led out from the tin bath is not effectively recycled; 2) without a dehydration device, the dew point of the purified gas can not be effectively controlled, and the gas can bring adverse effect to the glass quality after returning to the tin bath.
SUMMERY OF THE UTILITY MODEL
In order to overcome the defects of the prior art, the utility model provides a system for purifying and recycling waste gas of a float glass tin bath and recycling energy, which is used for solving the problems of environmental pollution and resource waste caused by the direct emission of the waste gas of the float glass tin bath.
The utility model provides a processing system for purifying and recycling float glass tin bath waste gas and recycling heat. The high-efficiency heat exchange system, related catalysts, drying agents and the like are adopted to purify the tin bath waste gas, the high-purity nitrogen and hydrogen mixed gas and high-temperature steam are produced, the high-purity nitrogen and hydrogen mixed gas returns to the tin bath for cyclic utilization, and the high-temperature steam can be used for heat preservation and the like of heavy oil pipelines of the glass kiln. The technical scheme has the advantages of simple operation, saving the cost of protective gas making and steam, reducing pollution, improving the utilization rate of the protective gas and having little influence on the pressure and temperature of the tin bath.
The utility model provides a technical scheme is:
the utility model provides a float glass molten tin bath exhaust purification retrieves and energy system of recycling, is the cyclic utilization system of connection between molten tin bath exhaust outlet and molten tin bath protection gas inlet header, its characterized in that, this system is including the heat reclamation device, dust remover, cooler, compressor, desulfurization deoxidation equipment, deoxidation after deoxidation cooler, drying device, accurate dust remover, the gas mixing tank that establish ties in proper order, wherein: the waste gas outlet of the tin bath is communicated with the heat recovery device, and the gas outlet of the gas mixing tank is communicated with the tin bath protection gas inlet main pipe; high-temperature waste gas discharged from a tin bath waste gas outlet enters a heat recovery device under the driving of a compressor, the cooled gas coming out of the heat recovery device enters a dust remover to remove dust in the dust remover and then enters a cooler to be cooled, the cooled gas enters a desulfurization and deoxidation device after being compressed by the compressor, the gas after desulfurization and deoxidation enters a drying device after being cooled by the cooler after deoxidation, the dried gas enters a precise dust remover to be further dedusted, then enters a gas mixing tank to be mixed with fresh protective gas, and finally enters a tin bath protective gas inlet main pipe from a gas outlet of the gas mixing tank to be reused.
The utility model discloses a float glass molten tin bath waste gas purification retrieves and energy system of recycling turns into steam with the heat of molten tin bath waste gas in the device of multistep series connection, with the impurity in the waste gas, like desorption such as tin oxide, stannous oxide, sulphide, oxygen, water, finally obtain nitrogen, the hydrogen mist that purity, pressure and temperature all accord with molten tin bath protective gas requirement, return molten tin bath cyclic utilization.
The utility model discloses an in the system, preferably, set up waste gas extraction device in molten tin bath waste gas outlet, this waste gas extraction device includes molten tin bath waste gas bleed pipeline, main process line and emergent discharge line, molten tin bath waste gas outlet is connected to molten tin bath waste gas bleed pipeline's one end, and the other end passes through tee junction main process line and emergent discharge line, main process line with heat recovery unit's gas inlet intercommunication. Furthermore, high-temperature-resistant program control valves are installed on the main process pipeline and the emergency discharge pipeline. A rain-proof cap is preferably arranged above the discharge port of the emergency discharge pipeline.
The heat recovery device is preferably a waste heat boiler, high-temperature waste gas discharged from a tin bath and liquid water are subjected to indirect heat exchange, the temperature of the waste gas can be reduced to 150-200 ℃ from 500-1000 ℃, the recovered heat enables the liquid water to generate steam, and meanwhile components such as stannous oxide in the waste gas are changed into solid powder from a gas state.
And a gas outlet of the heat recovery device is communicated with a gas inlet of the dust remover. The dust remover can be a filter cartridge type dust remover, preferably a high-temperature ceramic filter tube type dust remover, and can reduce the dust content of gas to 5-10 mg/Nm 3 Or lower.
And the gas outlet of the dust remover is communicated with the gas inlet of the cooler. The cooler preferably adopts a tubular heat exchanger, and the gas temperature is reduced to 30-50 ℃ from 150-200 ℃.
And the gas outlet of the cooler is communicated with the gas inlet of the compressor. The compressor raises the pressure of the cooled gas to 100-200 kPaG and the temperature to 150-200 ℃.
And a gas outlet of the compressor is communicated with a gas inlet of the desulfurization and deoxidation device. The desulfurization and deoxidation device can be composed of a desulfurization tower and a deoxidation tower which are connected in series, or the desulfurization tower and the deoxidation tower can be combined into a desulfurization and deoxidation tower, the upper layer is a desulfurization section, and the lower layer is a deoxidation section.
And a gas outlet of the desulfurization and deoxidation device is communicated with a gas inlet of the deoxidized cooler. The cooler after deoxidation preferably adopts a tubular heat exchanger, so that the temperature of the gas is reduced to 30-50 ℃ from 100-200 ℃.
And the air outlet of the deoxidized cooler is communicated with the air inlet of the drying device. The drying device can select one or more of active alumina, silica gel or molecular sieve as a drying agent, preferably a molecular sieve drying agent, more preferably a 3A, 4A or 5A molecular sieve drying agent, and can adopt a pressure swing adsorption type drying device or a temperature swing adsorption type drying device, and the dew point of the dried gas is reduced to-60 to-80 ℃ or below. Further, the drying device includes an adsorption tower and a regeneration tower, and the regeneration tower regenerates the desiccant adsorbing moisture by a heater.
And a gas outlet of the drying device is communicated with a gas inlet of the precise dust remover. The precise dust remover can be a filter cartridge type dust remover, preferably a ceramic filter cartridge type dust remover, so that the dust content in the gas is reduced to 5-10 mg/Nm 3 Or the following.
The gas mixing tank is provided with a purified gas inlet, a fresh protective gas inlet and a gas outlet, wherein the purified gas inlet is communicated with the gas outlet of the precision dust remover, the fresh protective gas inlet is communicated with a nitrogen and hydrogen gas mixing main pipe, and the gas outlet of the gas mixing tank is communicated with a tin bath protective gas inlet main pipe.
The utility model discloses a float glass molten tin bath exhaust purification retrieves and energy system of recycling's concrete implementation step as follows:
1) gas extraction: leading out high-temperature mixed gas from the tin bath waste gas outlets positioned at the breast walls on the two sides of the front end of the tin bath, wherein the gas temperature is 500-1000 ℃, and the pressure is 10-50 PaG. In order to ensure the sealing property, the corrosion resistance and the safety of the air-entraining system, the material of the used air-entraining pipeline is 316L, preferably 0Cr23Ni13, 0Cr25Ni20 and other corrosion-resistant and high-temperature-resistant materials, an emergency discharge pipeline is arranged, and program control valves are arranged on the emergency discharge pipeline and the main process pipeline to control the flow direction of the tin bath waste gas.
2) Energy recovery: the high-temperature mixed waste gas enters a heat recovery device, the heat recovery device preferably selects a waste heat boiler, the gas temperature is reduced to 150-200 ℃ from 500-1000 ℃, the recovered heat is used for generating steam, and meanwhile, components such as stannous oxide in the gas are changed into solid powder from a gas state.
3) Ash removal: the cooled gas enters a dust remover to remove dust in the gas, and the dust remover can be a filter drum type dust remover, preferably a high-temperature ceramic filter tubeThe dust content of the gas after dust removal is reduced to 5-10 mg/Nm by the dust remover 3 Or lower.
4) And (3) cooling: and (3) the dedusted gas enters a cooler, the temperature is reduced to 30-50 ℃ from 150-200 ℃, and the cooler is preferably a tube type heat exchanger.
5) Supercharging: and (4) introducing the cooled gas into a compressor, increasing the pressure to 100-200 kPaG and the temperature to 150-200 ℃.
6) And (3) desulfurization: in a desulfurization section of a desulfurization tower or a desulfurization and deoxidation tower, sulfides are removed by reaction with a desulfurizer, wherein the desulfurizer can be iron oxide or zinc oxide solid desulfurizer, preferably zinc oxide desulfurizer, and the outlet sulfur content is reduced to 1-5 ppm or below.
7) And (3) deoxidation: in a deoxidizing section of a deoxidizing tower or a desulfurizing and deoxidizing tower, oxygen reacts with hydrogen under the action of a deoxidizing catalyst to be removed, the catalyst can be a non-noble metal catalyst, such as a copper oxide or nichrome catalyst, preferably a platinum or palladium noble metal catalyst, and the outlet oxygen content is reduced to 1-5 ppm or below.
8) And (3) cooling after deoxidation: and (3) introducing the deoxidized gas into a deoxidized cooler, preferably a tubular heat exchanger, so that the temperature of the gas is reduced to 30-50 ℃ from 100-200 ℃.
9) And (3) drying: and (3) the cooled gas enters a drying device, the drying agent can be one or more of activated alumina, silica gel or molecular sieve, preferably a molecular sieve drying agent, more preferably a 3A, 4A or 5A molecular sieve drying agent, the drying process can be a pressure swing adsorption process, preferably a temperature swing adsorption process, more preferably a 2-tower or 3-tower temperature swing adsorption process, and the dew point of the dried gas is reduced to-60 to-80 ℃ or below.
10) Precise dust removal: the dried gas enters a precise dust remover, a filter drum type dust remover can be selected, a ceramic filter tube type dust remover is preferably selected, and the dust content in the gas is reduced to 5-10 mg/Nm 3 Or the following.
11) Returning the purified gas: the purified gas is fully mixed with fresh nitrogen and hydrogen protective gas in a gas mixing tank, and the gas enters a tin bath protective gas inlet main pipe and then returns to the tin bath.
Compared with the prior art, the beneficial effects of the utility model are that:
the utility model provides a float glass molten tin bath waste gas purification retrieves and energy system of recycling can obtain high-purity nitrogen, hydrogen gas mixture and high-temperature steam with the waste gas purification of molten tin bath protective gas, and whole process does not produce other waste water, waste residue, and the active ingredient rate of recovery is high. The high-purity nitrogen and hydrogen mixed gas obtained by recovery can be returned to the tin bath for cyclic utilization, and the obtained high-temperature steam can be used for heat preservation of heavy oil pipelines of the glass kiln and the like.
The utility model discloses pressure and temperature to the molten tin bath influence are very low, and load control range is wide, can effectively improve the utilization ratio of protective gas, pollution abatement. The system has relatively simple structure, saves the cost of gas making and steam, and has simple operation.
Drawings
FIG. 1 is a block diagram of the composition and process flow of a system for purifying and recycling waste gas from a float glass tin bath and recycling energy in accordance with the present invention;
FIG. 2 is a schematic structural view of a molten tin bath waste gas extraction device of the present invention;
in the figure: 1. a tin bath; 2. a heat recovery device; 3. a dust remover; 4. a cooler; 5. a compressor; 6. a desulfurizing tower; 7. a deoxygenation tower; 8. a cooler after deoxidation; 9. a drying device; 10. a precision dust remover; 11. a gas mixing tank; 12. fresh protective gas inlet main pipe, 1-1, tin bath waste gas bleed pipeline; 1-2, main process pipeline; 1-3, a molten tin bath waste gas emergency discharge pipeline; 1-4, a main process pipeline program control valve; 1-5, emergency discharge program control valve; 1-6, rain-proof cap; 1-7, molten tin; 1-8, glass liquid; 1-9, inner space of tin bath; 1-10 parts of a tin bath protective gas inlet.
Detailed Description
In order to explain the technical content, the achieved objects and effects of the present invention in detail, the present invention will be further explained by embodiments with reference to the accompanying drawings. Obviously, the drawings in the description are only part of the embodiments of the present invention, and other embodiments may be obtained by appropriately increasing or decreasing or adjusting the specific implementation flow according to different air sources, technical conditions, etc.
The utility model provides a float glass molten tin bath exhaust purification retrieves and energy system of recycling's simple process, no secondary pollution, and can retrieve high-purity nitrogen, hydrogen gas cyclic utilization, byproduct steam simultaneously. The system meets the national requirements of energy conservation and emission reduction in the industries with high energy consumption and high pollution.
Example 1:
a float glass tin bath waste gas purification recovery and energy reuse system is composed as shown in figure 1, and comprises a heat recovery device 2, a dust remover 3, a cooler 4, a compressor 5, a desulfurizing tower 6, a deoxygenation tower 7, a deoxygenated after-cooler 8, a drying device 9, a precise dust remover 10 and a gas mixing tank 11 which are sequentially connected in series, wherein: and a waste gas outlet of the tin bath 1 is communicated with the heat recovery device 2, and a gas outlet of the gas mixing tank 11 is communicated with a tin bath protective gas inlet main pipe.
The tail gas treated in the embodiment is the waste gas of the tin bath protective gas of the 1000 t/d-grade float glass, but is not limited to the waste gas treatment of the tin bath protective gas of the grade. The method for purifying gas and recovering energy of the embodiment specifically comprises the following steps:
(a) high-temperature gas in the tin bath 1 enters a heat recovery device 2 through a tin bath waste gas bleed air pipeline 1-1, and the heat recovery device 2 is a waste heat boiler in the embodiment. Under the action of the variable frequency compressor 5, high-temperature gas with the temperature of 500-1000 ℃ and the pressure of 10-50 PaG enters the waste heat boiler from the gas inlet, the high-temperature gas and liquid water in the waste heat boiler indirectly exchange heat to generate 0.35-0.75 MPa steam, meanwhile, the gas temperature is reduced from 500-1000 ℃ to 150-200 ℃, and SnO in the gas 2 And the gas state is changed into the solid state, and the gas flows out of the gas outlet of the waste heat boiler along with the gas flow.
(b) The mixed gas from the step (a) enters a dust remover 3, a high-temperature ceramic tube filter is arranged in the dust remover 3, and solid impurities such as dust in the mixed gas can be filtered out to obtain the mixed gas with the dust content lower than 5mg/Nm 3 N of (A) 2 、H 2 The mixed gas also comprises O 2 、H 2 O、H 2 S and other trace impurities. Continuous operation of the apparatus can be achieved by periodically collecting and processing the dust in the dust collector 3.
(c) And (c) introducing the mixed gas from the step (b) into a cooler 4, wherein the cooler 4 adopts a tube type water-cooled heat exchanger, and the temperature of the gas is reduced to 30-50 ℃ from 150-200 ℃. The cooled gas enters a compressor 5, the pressure is increased from-30 kPa-50 PaG to 100-200 kPaG, and the temperature is increased from 30-50 ℃ to 100-200 ℃ and then the gas is discharged from the outlet of the compressor.
(d) The gas from step (c) is introduced into a desulfurizing tower 6 from the top, the desulfurizing tower 6 is filled with a zinc oxide desulfurizing agent, and H in the gas 2 S reacts with ZnO as follows H 2 S+ZnO→ZnS+H 2 O, thereby reacting H 2 And (4) removing the S. The desulfurized gas is discharged from the outlet at the bottom of the desulfurizing tower 6.
(e) The gas from step (d) is introduced from the top of a deoxygenator column 7, the deoxygenator column 7 is filled with a palladium catalyst, and a trace amount of O in the gas 2 And H 2 Reaction 2H under the action of palladium catalyst 2 +O 2 →2H 2 O, thereby adding O 2 And (4) removing. Air speed of gas in the deoxygenation tower 7 is 5000-20000 h -1 . The oxygen content in the gas at the outlet of the deoxygenation tower 7 is reduced to below 5ppm, the temperature is 150-200 ℃, and the pressure is 150-200 kPaG.
(f) And the deoxidized gas enters a deoxidized cooler 8 which adopts a tube type water-cooled heat exchanger, and the temperature of the gas is reduced from 150-200 ℃ to 30-50 ℃.
(g) And (f) introducing the gas from the step (f) into a drying device 9, dehydrating by adopting a 3-tower temperature swing adsorption process (namely a TSA process), filling a 3A molecular sieve drying agent into the tower, wherein the adsorption temperature is 30-50 ℃, the adsorption pressure is 150-200 kPaG, the gaseous water is adsorbed by the drying agent, and the dew point of the dried gas is reduced to be below-60 ℃.
(h) The dried gas passes through a precise dust remover 10, the precise dust remover 10 adopts a high-temperature resistant ceramic filter tube type dust remover, and the dust content in the gas at the outlet is reduced to 5mg/Nm 3 The following.
(i) The gas purified by the steps enters the gas mixing tank 11, is fully mixed with the nitrogen and hydrogen gas entering from the fresh protective gas inlet main pipe 12, the outlet pipeline of the gas mixing tank 11 is connected with the tin bath protective gas inlet 1-10, and the mixed protective gas enters the tin bath through the tin bath protective gas inlet 1-10, so that the recycling of the circulating gas is realized.
FIG. 2 shows a high-temperature exhaust gas lead-out device of the molten tin bath 1. One end of a molten tin bath waste gas bleed pipeline 1-1 is communicated with the molten tin bath 1, and the other end of the molten tin bath waste gas bleed pipeline is connected with a main process pipeline 1-2 and a molten tin bath waste gas emergency discharge pipeline 1-3 through a tee joint. High-temperature-resistant program-controlled valves are respectively arranged on the main process pipeline 1-2 and the molten tin bath waste gas emergency discharge pipeline 1-3: a main process pipeline program control valve 1-4 and an emergency discharge program control valve 1-5. When the purification device normally operates, gas enters the energy recovery device through the molten tin bath waste gas bleed pipeline 1-1, the main process pipeline 1-2 and the main process pipeline program control valve 1-4, and at the moment, the emergency discharge program control valve 1-5 on the molten tin bath waste gas emergency discharge pipeline 1-3 is kept closed; when the gas purification device breaks down, the main process pipeline program control valve 1-4 on the main process pipeline 1-2 is closed, meanwhile, the emergency discharge program control valve 1-5 on the tin bath waste gas emergency discharge pipeline 1-3 is opened, and the tin bath waste gas is discharged through the emergency discharge pipeline, so that the safe and stable operation of the tin bath and the whole glass production line is ensured. Rain-proof caps 1-6 are arranged above the discharge ports of the tin bath waste gas emergency discharge pipelines 1-3.
In a preferred embodiment, the desulfurization column 6 and the deoxygenation column 7 can be combined into one column, the upper layer is a desulfurization section, the lower layer is a deoxygenation section, and the gas enters from the top and flows out from the bottom.
In another preferred embodiment, the regeneration heat source of the adsorbent in the drying device can select high-temperature mixed gas after deoxygenation in the deoxygenation tower, so as to replace an electric heating or steam heat exchange mode, and achieve the purpose of energy conservation.
To sum up, the utility model provides a pair of float glass molten tin bath protection gas exhaust purification and energy recuperation system has following advantage:
1) the heat of the tin bath waste gas is effectively utilized, and the tin bath waste gas can be used for producing high-temperature steam, so that the waste of heat is avoided.
2) The purified product is high-purity nitrogen and hydrogen mixed gas and can return to the tin bath to realize cyclic utilization, thereby avoiding resource waste and environmental pollution caused by direct discharge of waste gas of the tin bath and effectively reducing the load and the operation cost of a gas making working section.
3) The whole process does not produce other waste water and waste residue, the operation cost is low, the operation is simple, and the influence on the pressure and the temperature of the tin bath is small.
It is to be noted that the disclosed embodiments are intended to facilitate a further understanding of the invention, and the above-described embodiments may be freely combined as desired. The above description is only a partial embodiment of the present invention, but those skilled in the art can understand that: according to the basic principle of the present invention, appropriate improvements and adjustments can be made, and these improvements and adjustments should also be regarded as the protection scope of the present invention. Therefore, the present invention should not be limited to the embodiments disclosed, and the scope of the present invention is defined by the appended claims.
Claims (10)
1. The utility model provides a float glass molten tin bath exhaust purification retrieves and energy system of recycling, is the cyclic utilization system of connection between molten tin bath exhaust outlet and molten tin bath protection gas inlet header, its characterized in that, this system is including the heat reclamation device, dust remover, cooler, compressor, desulfurization deoxidation equipment, deoxidation after deoxidation cooler, drying device, accurate dust remover, the gas mixing tank that establish ties in proper order, wherein: and the waste gas outlet of the tin bath is communicated with the heat recovery device, and the gas outlet of the gas mixing tank is communicated with the tin bath protection gas inlet main pipe.
2. The system for purifying, recovering and recycling the waste gas of the tin bath for the float glass according to claim 1, wherein a waste gas leading-out device is provided at the waste gas outlet of the tin bath, and the waste gas leading-out device comprises a tin bath waste gas leading pipeline, a main process pipeline and an emergency discharge pipeline; one end of the molten tin bath waste gas bleed pipeline is connected with a molten tin bath waste gas outlet, and the other end of the molten tin bath waste gas bleed pipeline is connected with the main process pipeline and the emergency discharge pipeline through a tee; the main process conduit is in communication with the gas inlet of the heat recovery unit.
3. The float glass tin bath waste gas purification recovery and energy recovery system of claim 2, wherein the high temperature resistant programmable valves are installed on both the main process pipe and the emergency vent pipe.
4. The float glass tin bath waste gas purification recovery and energy reuse system of claim 2, wherein a rain cap is disposed over the discharge port of the emergency discharge pipe.
5. The float glass tin bath waste gas purification and energy recovery system of claim 1, wherein the heat recovery device is a waste heat boiler.
6. The float glass tin bath waste gas purification recovery and energy recovery system of claim 1, wherein the dust collector and the precision dust collector are cartridge type dust collectors.
7. The float glass tin bath waste gas purification recovery and energy reuse system of claim 1, wherein the cooler and the post-deoxidation cooler are tubular heat exchangers.
8. The system for purification, recovery and energy reuse of float glass tin bath exhaust gas according to claim 1, wherein the desulfurization and deoxidation apparatus is composed of a desulfurization tower and a deoxidation tower connected in series, or a desulfurization and deoxidation tower having a desulfurization section at the upper layer and a deoxidation section at the lower layer.
9. The system for purification, recovery and energy reuse of float glass tin bath exhaust gas according to claim 1, wherein the drying device is a pressure swing adsorption type drying device or a temperature swing adsorption type drying device.
10. The float glass tin bath waste gas purifying and recycling and energy recycling system of claim 1, wherein the gas mixing tank is provided with a purified gas inlet, a fresh shielding gas inlet and a gas outlet, wherein the purified gas inlet is communicated with the gas outlet of the precision dust collector, the fresh shielding gas inlet is communicated with the nitrogen and hydrogen gas mixing main pipe, and the gas outlet of the gas mixing tank is communicated with the tin bath shielding gas inlet main pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220581982.8U CN217220674U (en) | 2022-03-17 | 2022-03-17 | Float glass tin bath waste gas purification recovery and energy recycling system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220581982.8U CN217220674U (en) | 2022-03-17 | 2022-03-17 | Float glass tin bath waste gas purification recovery and energy recycling system |
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| CN217220674U true CN217220674U (en) | 2022-08-19 |
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| CN202220581982.8U Active CN217220674U (en) | 2022-03-17 | 2022-03-17 | Float glass tin bath waste gas purification recovery and energy recycling system |
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