Glass melting furnace flue gas purification system and flue gas purification method

Abstract

The present invention provides a flue gas purification system for a glass melting furnace, comprising a lime silo, an ammonia zone, and an integrated ceramic tube reactor, for desulfurization, denitrification, and dust removal of flue gas within a main flue gas channel. A first flue gas channel branches off from the main flue gas channel, and an adsorbent recycling device and an auxiliary desulfurization device are sequentially arranged on the first flue gas channel. The auxiliary desulfurization device is connected to the main flue gas channel via a second flue gas channel. The auxiliary desulfurization device is connected to the top of the adsorbent recycling device via a third flue gas channel, and the adsorbent recycling device is connected to the second flue gas channel via a fourth flue gas channel. The lime silo is connected to the adsorbent recycling device via a first delivery pipe, for which new adsorbent is added. The bottom of the integrated ceramic tube reactor is connected to the adsorbent recycling device via a second delivery pipe, for which old adsorbent is added. This invention achieves efficient desulfurization and improves adsorbent utilization efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of flue gas treatment, and in particular to a glass melting furnace flue gas purification system and a flue gas purification method. Background Art

[0002] With the development of science and technology and the progress of society, people are increasingly paying attention to environmental protection. In the face of rapid economic development, environmental protection requirements are also gradually increasing. People want both mountains of gold and silver and green mountains and clear waters. Within the field of environmental protection, protection against air pollution can be said to be a very important branch.

[0003] Flue gas emitted from glass kilns has a significant impact on atmospheric pollution. To reduce the environmental impact of flue gas from glass kilns, existing technologies employ a range of flue gas treatment equipment to remove dust, desulfurize, and denitrate the flue gas. However, existing technologies for purifying flue gas from glass kilns still have drawbacks. For example, due to the high calcium-sulfur ratio in the dry desulfurization process of ceramic integrated systems, the purification of highly sulfurized flue gas is not thorough enough, adsorbent usage is inefficient, and solid waste from inefficient adsorbents is difficult to dispose of.

[0004] Therefore, in order to solve the above technical problems, a glass melting furnace flue gas purification system and a flue gas purification method are needed to improve the desulfurization capacity and the use efficiency of the adsorbent. Summary of the Invention

[0005] The object of the present invention is to provide a glass melting furnace flue gas purification system, the system comprising:

[0006] The lime silo, ammonia zone and ceramic tube integrated reactor are used for desulfurization, denitrification and dust removal of flue gas in the main flue gas channel;

[0007] A first flue gas channel branched from the main flue gas channel is provided with an adsorbent recycling device and an auxiliary desulfurization device in sequence on the first flue gas channel, and the auxiliary desulfurization device is connected to the main flue gas channel through a second flue gas channel;

[0008] The desulfurization auxiliary device is connected to the adsorbent recycling transposition top through the third flue gas channel, and the adsorbent recycling device is connected to the second flue gas channel through the fourth flue gas channel;

[0009] The lime bin is connected to the adsorbent recycling device through a first delivery pipeline, and new adsorbent is added to the adsorbent recycling device. The bottom of the ceramic tube integrated reactor is connected to the adsorbent recycling device through a second delivery pipeline, and old adsorbent is added to the adsorbent recycling device.

[0010] In a preferred embodiment, the system further includes a waste bin, the bottom of the ceramic tube integrated reactor is connected to the waste bin via a third delivery pipeline, and the adsorbent recycling device is connected to the waste bin via a fourth delivery pipeline.

[0011] In a preferred embodiment, the auxiliary desulfurization device includes a conditioning tower, the conditioning tower is connected to the first flue gas channel, and a static mixer is arranged in the first flue gas channel;

[0012] A venturi tube and a purified air introduction interface are provided at the bottom of the conditioning tower to adjust the smoke velocity of the smoke entering the conditioning tower.

[0013] In a preferred embodiment, the adsorbent recycling device is provided with a cyclone tower, a middle diamond-shaped powder storage tank and a fluidizing tank;

[0014] The cyclone tower is used to recover the adsorbent in the flue gas;

[0015] The screw conveyor connected to the outlet of the middle diamond-shaped powder storage tank sprays the old adsorbent into the first flue gas channel for recycling the old adsorbent.

[0016] In a preferred embodiment, the fluidized tank is connected to the second delivery pipeline, and the old adsorbent is sprayed into the fluidized tank through the second delivery pipeline;

[0017] The outlet of the fluidizing tank sprays the old adsorbent into the first flue gas channel through the pneumatic conveying channel.

[0018] In a preferred embodiment, the adsorbent recycling device is provided with a cyclone tower, a middle diamond-shaped powder storage tank and a fluidizing tank;

[0019] The middle diamond-shaped powder storage tank is connected to the first conveying pipeline, and new adsorbent is added to the middle diamond-shaped powder storage tank through the first conveying pipeline. The screw conveyor connected to the lower outlet of the middle diamond-shaped powder storage tank sprays the new adsorbent into the first flue gas channel.

[0020] In a preferred embodiment, the fluidized tank is connected to the first delivery pipeline via a periodic powder supply device, and new adsorbent is added to the fluidized tank;

[0021] The outlet of the fluidizing tank sprays new adsorbent into the first flue gas channel through the pneumatic conveying channel.

[0022] In a preferred embodiment, a first valve is provided on the main smoke channel for controlling the smoke from entering the first smoke channel;

[0023] A second valve is provided on the third flue gas channel for controlling the flue gas in the desulfurization auxiliary device to enter the adsorbent recycling device;

[0024] A third valve is provided on the second flue gas channel for controlling the flue gas in the desulfurization auxiliary device to enter the second flue gas channel;

[0025] The second smoke channel is further provided with a fourth valve for controlling the smoke in the second smoke channel to enter the main smoke channel.

[0026] Another aspect of the present invention is to provide a glass melting furnace flue gas purification method, the method comprising the following steps:

[0027] The kiln flue gas below the process temperature requirement is heated by the heater and then enters the first flue gas channel. The adsorbent recycling device sprays old adsorbent into the first flue gas channel.

[0028] The flue gas enters the auxiliary desulfurization device through the first flue gas channel for desulfurization, and enters the adsorbent recycling device through the third flue gas channel to recover the adsorbent in the flue gas.

[0029] The second delivery pipeline at the bottom of the ceramic tube integrated reactor is used to add old adsorbent to the adsorbent recycling device;

[0030] After being recycled in the adsorbent recycling device, the old adsorbent is pumped into the waste bin through the fourth conveying pipeline;

[0031] After the flue gas recovers the adsorbent, it passes through the fourth flue gas channel and the second flue gas channel and returns to the main flue gas channel.

[0032] Another aspect of the present invention is to provide a glass melting furnace flue gas purification method, the method comprising the following steps:

[0033] The kiln flue gas, which is lower than the process temperature requirement, is heated by the heater and then enters the first flue gas channel.

[0034] The lime silo adds new adsorbent to the adsorbent recycling device through the first delivery pipeline, and the adsorbent recycling device sprays the new adsorbent into the first flue gas channel;

[0035] The flue gas enters the auxiliary desulfurization device through the first flue gas channel for desulfurization. After desulfurization, the flue gas passes through the second flue gas channel and returns to the main flue gas channel.

[0036] After the lime silo sprays new adsorbent into the main flue gas channel, the flue gas enters the ceramic tube integrated reactor for desulfurization, denitrification and dust removal treatment.

[0037] The present invention provides a glass melting furnace flue gas purification system and flue gas purification method, which divide the main flue gas channel into two branches, a first flue gas channel and a second flue gas channel, and sequentially arrange an adsorbent recycling device and an auxiliary desulfurization device on the first flue gas channel, thereby improving the desulfurization capacity of high-sulfide flue gas.

[0038] The present invention provides a glass melting furnace flue gas purification system and flue gas purification method, which injects the old adsorbent filtered by the ceramic tube integrated reactor into a set adsorbent recycling device, reuses the old adsorbent, effectively improves the desulfurization efficiency, realizes the efficient utilization of the adsorbent, and thus greatly reduces the amount of solid waste.

[0039] The present invention provides a glass melting furnace flue gas purification system and flue gas purification method, which set valves in different flue gas channels to control the direction of flue gas, and implement different purification processes for different concentrations of sulfides, making the glass melting furnace flue gas purification system more flexible in flue gas purification.

[0040] It should be understood that the foregoing general description and the following detailed description are exemplary illustrations and explanations and should not be used as limitations on the content of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Further objects, functions and advantages of the present invention will be clarified through the following description of the embodiments of the present invention with reference to the accompanying drawings, in which:

[0042] Figure 1 It is a structural diagram of a ceramic integrated flue gas purification system in the prior art.

[0043] Figure 2 It is a structural schematic diagram of a glass melting furnace flue gas purification system provided by the present invention.

[0044] Figure 3 It is a structural schematic diagram of the auxiliary desulfurization device and the adsorbent recycling device of the present invention. DETAILED DESCRIPTION

[0045] The objects and functions of the present invention, as well as methods for achieving these objects and functions, will be clarified with reference to exemplary embodiments. However, the present invention is not limited to the exemplary embodiments disclosed below; it can be implemented in various forms. The essence of the description is merely to help those skilled in the relevant art to comprehensively understand the specific details of the present invention.

[0046] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In the accompanying drawings, the same reference numerals represent the same or similar components, or the same or similar steps.

[0047] In order to clearly explain the content of the present invention, the structure of the ceramic integrated system in the prior art is first described. Figure 1The schematic diagram of the structure of the prior art ceramic integrated flue gas purification system is shown. The flue gas from the glass kiln enters the main flue gas channel 101 directly from the kiln flue gas outlet 102. Adsorbent (lime powder) is sprayed into the main flue gas channel 101 from the lime silo 1, and ammonia water is sprayed into the main flue gas channel 101 through the ammonia zone. The flue gas then passes through a multi-stage static mixer to achieve uniform gas-solid and gas-gas mixing. It then enters the ceramic integrated system 2 for desulfurization and denitrification purification. The purified flue gas is then introduced into the chimney from the flue gas outlet 202 of the ceramic integrated system 2 through an induced draft fan and discharged. The filtered adsorbent is collected at the bottom of the ceramic integrated system 2 and pumped into the waste silo 3 by a silo pump through the waste conveying pipe 201.

[0048] The above-mentioned existing flue gas purification system has a series of problems such as poor flue gas desulfurization effect and low adsorbent utilization efficiency when dealing with flue gas containing high sulfides. To solve the defects in the existing technology, the present invention proposes a glass melting furnace flue gas purification system and flue gas purification method.

[0049] like Figure 2 The structure diagram of a glass melting furnace fume purification system provided by the present invention is shown in FIG. Figure 3 According to an embodiment of the present invention, a flue gas purification system for a glass melting furnace comprises: a lime silo 1, an ammonia zone 8, and a ceramic tube integrated reactor 2, which is used for desulfurization, denitrification, and dust removal of flue gas in a main flue gas channel.

[0050] According to an embodiment of the present invention, a first flue gas channel 105 is branched from the main flue gas channel 101, and an adsorbent recycling device 5 and an auxiliary desulfurization device 4 are sequentially arranged on the first flue gas channel 105. The auxiliary desulfurization device 4 is connected to the main flue gas channel 101 through a second flue gas channel 106. A static mixer 404 is arranged in the main flue gas channel 101. Preferably, in this embodiment, multiple static mixers are arranged in the main flue gas channel 101, distributed in different sections of the main flue gas channel.

[0051] The top of the desulfurization auxiliary device 4 is connected to the top of the adsorbent recycling device 5 through the third flue gas channel 107 , and the adsorbent recycling device 5 is connected to the second flue gas channel 106 through the fourth flue gas channel 108 .

[0052] The lime silo 1 is connected to the adsorbent recycling device via a first delivery pipe 103, which adds new adsorbent to the adsorbent recycling device 5. In this embodiment, a silo pump is installed at the bottom of the lime silo 1 to add new adsorbent to the adsorbent recycling device. The bottom of the ceramic tube integrated reactor 2 is connected to the adsorbent recycling device 5 via a second delivery pipe 203, which adds old adsorbent to the adsorbent recycling device 5. In this embodiment, a silo pump 205 is installed at the bottom of the ceramic tube integrated reactor 2 to add old adsorbent to the adsorbent recycling device.

[0053] The new adsorbent here refers to the adsorbent (calcium hydroxide) that is not subjected to flue gas treatment and is directly derived from the lime silo 1 , and the old adsorbent refers to the adsorbent after the adsorbent reacts in the ceramic tube integrated reactor 2 .

[0054] According to an embodiment of the present invention, a first valve 109 is provided on the main flue gas passage 101 to control the entry of flue gas into the first flue gas passage 105. For example, when the first valve 109 is closed, flue gas from the glass furnace enters the first flue gas passage 105 and enters the desulfurization auxiliary device 4 for desulfurization. When the first valve 109 is opened, the flue gas from the glass furnace enters the ceramic tube integrated reactor 2 through the main flue gas passage 101 for desulfurization and denitrification.

[0055] According to an embodiment of the present invention, a second valve 110 is provided on the third flue gas channel 107 for controlling the flue gas in the desulfurization auxiliary device 4 to enter the adsorbent recycling device 5 .

[0056] A third valve 111 is provided on the second flue gas channel 106 for controlling the flue gas in the desulfurization auxiliary device 4 to enter the second flue gas channel.

[0057] A fourth valve 112 is further provided on the second flue gas channel 106 for controlling the flue gas in the second flue gas channel 106 to enter the main flue gas channel 101 .

[0058] The present invention controls the direction of the flue gas by setting valves in different flue gas channels, and implements flue gas purification methods of different processes for different concentrations of sulfides (different flue gas purification methods will be described in detail below), so that the glass melting furnace flue gas purification system is more flexible in flue gas purification. A glass melting furnace flue gas purification system of the present invention also includes a waste bin 3, the bottom of the ceramic tube integrated reactor 2 is connected to the waste bin through a third conveying pipe 201, and the adsorbent recycling device 5 is connected to the waste bin 3 through a fourth conveying pipe 104. In some embodiments, after the adsorbent of the adsorbent recycling device 5 is recycled, it is pumped into the waste bin 3 through the fourth conveying pipe 104. In some embodiments, the old adsorbent after the reaction of the ceramic tube integrated reactor 2 is directly pumped into the waste bin through the third conveying pipe 201.

[0059] According to an embodiment of the present invention, the auxiliary desulfurization device 4 includes a conditioning tower 401 . The conditioning tower 401 is in communication with the first flue gas channel 105 . A static mixer 404 is arranged in the first flue gas channel 105 .

[0060] A venturi tube 402 and a purified air inlet port 116 are provided at the bottom of the conditioning tower 401 to adjust the flue gas velocity entering the conditioning tower 401. In this embodiment, the height of the conditioning tower 401 is designed based on a flue gas velocity of no less than 3 m / s and a travel time within the tower of no less than 5 s, to achieve desulfurization over long flue gas sections.

[0061] In the embodiment, the tempering tower 401 is also provided with a tower bottom cleaning door, a spiral backflush device 403, an ammonia reserved interface, a tower body inspection door, instruments (pressure difference) and other functional components, which can be selected by those skilled in the art according to actual needs.

[0062] According to some embodiments of the present invention, a cyclone tower 501 , a middle diamond-shaped powder storage tank 502 and a fluidizing tank 403 are provided in the adsorbent recycling device 5 .

[0063] The cyclone tower 501 is used to recover adsorbent from the flue gas. To prevent old adsorbent from the flue gas from returning to the ceramic tube integrated reactor 2, the present invention uses the cyclone tower 501 to recover the adsorbent from the flue gas. Purified air is introduced through the purified air interface 116 to adjust the optimal flue gas velocity of the cyclone to no less than 18 m / s, ensuring efficient removal of the recycled adsorbent. The flue gas after adsorbent recovery enters the second flue gas channel 106 through the fourth flue gas channel 108 at the top of the adsorbent recycling device 5, and ultimately returns to the main flue gas channel 101.

[0064] The outlet of the middle diamond-shaped powder storage tank 502 is connected to a screw conveyor, which sprays the old adsorbent into the first flue gas channel 105 through the fifth conveying pipe 115 for recycling of the old adsorbent.

[0065] The fluidized tank 503 is connected to the second delivery pipe 203, and the bottom of the ceramic tube integrated reactor 2 is sprayed with the old adsorbent into the fluidized tank through the second delivery pipe 203. The outlet of the fluidized tank 503 is sprayed with the old adsorbent into the first flue gas channel 105 through the pneumatic delivery channel.

[0066] The old adsorbent returns to the flue gas, and returns to the adsorbent recycling device 5 through the auxiliary desulfurization device 4 and the third flue gas channel 107, and is recovered again through the cyclone tower 501. After multiple cycles and utilization, it is pumped into the waste bin 3 through the fourth conveying pipeline 104.

[0067] In some embodiments, the adsorbent usage rate can be checked on-site, and when the usage rate reaches 80% to 90%, the adsorbent is pumped into a waste bin. In one embodiment, a cycle number can be set. For example, after the old adsorbent has been circulated three times in the adsorbent recycling device 5 and the auxiliary desulfurization device 4, the adsorbent is pumped into the waste bin.

[0068] In this embodiment, the fluidizing tank 503 includes functional components such as a fluidizing trough, a powder injection valve, a backflush valve assembly, a powder injection bell valve, a weight sensor, a reactor waste inlet, a new powder inlet, a waste conveying port, a temperature sensor, and other instruments and meters to control the amount of adsorbent injected into the first flue gas channel 105. Those skilled in the art may select appropriate functional components based on actual needs, and the present invention does not impose specific limitations thereon.

[0069] According to some embodiments of the present invention, a cyclone tower 501 , a middle diamond-shaped powder storage tank 502 and a fluidizing tank 503 are provided in the adsorbent recycling device.

[0070] The middle diamond-shaped powder storage tank 502 is connected to the first conveying pipe 103, and new adsorbent is added to the middle diamond-shaped powder storage tank 502 through the first conveying pipe 103. The screw conveyor connected to the lower outlet of the middle diamond-shaped powder storage tank sprays new adsorbent into the first flue gas channel 105 through the fifth conveying pipe 115.

[0071] The fluidized tank 503 is connected to the first conveying pipe 103 via a periodic powder supply device, and the lime bin 1 adds new adsorbent to the fluidized tank 503 via the first conveying pipe 103. The outlet of the fluidized tank 503 sprays new adsorbent into the first flue gas channel 105 via a pneumatic conveying channel.

[0072] The new adsorbent enters the first flue gas channel 105 , passes through the auxiliary desulfurization device 4 and the second flue gas channel 106 , returns to the main flue gas channel 101 , and finally enters the ceramic tube integrated reactor 2 .

[0073] The present invention divides the main flue gas channel into two branches, the first flue gas channel and the second flue gas channel, and arranges an adsorbent recycling device and an auxiliary desulfurization device in sequence on the first flue gas channel to recycle the adsorbent, thereby improving the desulfurization capacity of high-sulfide flue gas and achieving efficient utilization of the adsorbent.

[0074] The following describes the flue gas purification methods implemented by the present invention in different processes.

[0075] Flue gas purification process 1:

[0076] According to an embodiment of the present invention, when the flue gas contains a high concentration of sulfides, the flue gas passes through the auxiliary desulfurization device 4 and the adsorbent recycling device 5 to improve the desulfurization capacity and efficiently utilize the adsorbent, thereby reducing the amount of solid waste.

[0077] When there is a high concentration of sulfide in the flue gas, the first valve 109 on the main flue gas channel 101 is closed, the second valve 110 set on the third flue gas channel 107 is opened, the third valve 111 set on the second flue gas channel 106 is closed, and the fourth valve 112 set on the second flue gas channel 106 is opened.

[0078] According to an embodiment of the present invention, a glass melting furnace flue gas purification method includes the following method steps:

[0079] The kiln flue gas whose temperature is lower than the process temperature requirement is heated by the heater 114 at the kiln flue gas outlet 102 and then enters the first flue gas channel 105 . The adsorbent recycling device 5 sprays old adsorbent into the first flue gas channel 105 .

[0080] The flue gas enters the auxiliary desulfurization device 4 through the first flue gas channel 105 for desulfurization, and enters the adsorbent recycling device 5 through the third flue gas channel 107 to recover the adsorbent in the flue gas.

[0081] The second delivery pipe 203 at the bottom of the ceramic tube integrated reactor 2 is used to add old adsorbent to the adsorbent recycling device 5 .

[0082] After being recycled in the adsorbent recycling device 5 , the old adsorbent is pumped into the waste bin 3 through the fourth delivery pipeline 104 .

[0083] After the flue gas recovers the adsorbent, it passes through the fourth flue gas channel 108 and the second flue gas channel 106 , returns to the main flue gas channel 101 , and finally enters the ceramic tube integrated reactor 2 .

[0084] In some embodiments, the flue gas after adsorbent recovery enters the second flue gas channel 106 through the fourth flue gas channel 108 at the top of the adsorbent recycling device 5, and ultimately returns to the main flue gas channel 101. After the lime silo 1 sprays new adsorbent into the main flue gas channel 101, the flue gas enters the ceramic tube integrated reactor 2 for desulfurization, denitrification, and dust removal. Finally, the purified flue gas is introduced into the chimney through the flue gas outlet 202 of the ceramic integrated system 2 via the induced draft fan 6 and discharged. In some embodiments, the induced draft fan 6 introduces the purified air into the heater 114, which serves as dilution air for heating the high-temperature flue gas or to adjust the flue gas flow rate at the inlet of the cyclone tower 501.

[0085] According to an embodiment of the present invention, the auxiliary desulfurization device 4 includes a conditioning tower 401 . The conditioning tower 401 is in communication with the first flue gas channel 105 . A static mixer 404 is arranged in the first flue gas channel 105 .

[0086] A venturi tube 402 and a purified air introduction interface 116 are provided at the bottom of the conditioning tower 401 to adjust the velocity of the flue gas entering the conditioning tower 401 .

[0087] In the embodiment, the tempering tower 401 is further provided with a tower bottom cleaning door, an ammonia water reserved interface, a tower body inspection door, instruments (pressure difference) and other functional components, which can be selected by those skilled in the art according to actual needs.

[0088] According to an embodiment of the present invention, a cyclone tower 501 , a middle diamond-shaped powder storage tank 502 and a fluidizing tank 503 are provided in the adsorbent recycling device.

[0089] The cyclone tower 501 is used to recover the adsorbent in the flue gas. In order to prevent the old adsorbent in the flue gas from returning to the ceramic tube integrated reactor, the present invention recovers the adsorbent in the flue gas through the cyclone tower 501.

[0090] The outlet of the middle diamond-shaped powder storage tank 502 is connected to a screw conveyor, which sprays the old adsorbent into the first flue gas channel 105 through the fifth conveying pipe 115 for recycling of the old adsorbent.

[0091] The fluidized tank 503 is connected to the second delivery pipe 203, and the bottom of the ceramic tube integrated reactor 2 is sprayed with the old adsorbent into the fluidized tank through the second delivery pipe 203. The outlet of the fluidized tank 503 is sprayed with the old adsorbent into the first flue gas channel 105 through the pneumatic delivery channel.

[0092] The old adsorbent returns to the flue gas, and returns to the adsorbent recycling device 5 through the auxiliary desulfurization device 4 and the third flue gas channel 107, and is recovered again through the cyclone tower 501. After multiple cycles and utilization, it is pumped into the waste bin 3 through the fourth conveying pipeline 104.

[0093] In the embodiment, the amount of old adsorbent sprayed into the first flue gas channel 105 is measured by a weight sensor, so that the gas-solid mixed flow is sprayed into the first flue gas duct 105 in a measured manner.

[0094] In the first flue gas channel 105, a static mixer 404 is arranged at the interface of the air inlet of the conditioning tower 401. After the flue gas enters the static mixer 404 for gas-solid two-phase flow mixing, it enters the conditioning tower 401 for uniform mixing and primary desulfurization. The flue gas velocity in the conditioning tower 401 is controlled to be no less than 3m / s through the venturi tube 402 and the purified air introduction interface 116. The flue gas that has undergone primary desulfurization enters the cyclone tower 501 to complete the efficient collection of the adsorbent and prevent the adsorbent from entering the subsequent flue (the second flue gas channel and the main flue gas channel). The flue gas after purification and dust collection enters the main flue gas channel, new adsorbent is sprayed into the lime silo 1, and ammonia is sprayed into the ammonia spray point, and finally enters the ceramic tube integrated reactor 2.

[0095] The above flue gas purification process can be simplified as follows: the original flue gas enters the first flue gas channel → the adsorbent recycling device sprays the old adsorbent into the flue gas → the auxiliary desulfurization device → the cyclone tower in the adsorbent recycling device → powder spraying (ammonia spraying) → ceramic tube integrated reactor.

[0096] The invention discloses a glass melting furnace flue gas purification method, which can effectively improve the desulfurization capacity of flue gas with high concentration of sulfide, and efficiently utilizes adsorbent, thereby greatly reducing the amount of solid waste.

[0097] Flue gas purification process 2:

[0098] When the sulfide content in the flue gas is high, the first valve 109 on the main flue gas channel 101 is closed, the second valve 110 set on the third flue gas channel 107 is closed, the third valve 111 set on the second flue gas channel 106 is opened, and the fourth valve 112 set on the second flue gas channel 106 is opened. The second delivery pipeline 203 stops adding old adsorbent to the adsorbent recycling device 5, for example, closing the valve of the second delivery pipeline 203 stops adding old adsorbent.

[0099] According to an embodiment of the present invention, a glass melting furnace flue gas purification method includes the following steps:

[0100] After the kiln flue gas, which is lower than the process temperature requirement, is heated by the heater 114 at the kiln flue gas outlet 102 , the flue gas enters the first flue gas channel 105 , and the lime silo adds new adsorbent to the adsorbent recycling device 5 through the first conveying pipeline 103 , and the adsorbent recycling device 5 sprays new adsorbent into the first flue gas channel 105 .

[0101] The flue gas enters the auxiliary desulfurization device 4 through the first flue gas channel 105 for desulfurization. After desulfurization, the flue gas returns to the main flue gas channel 101 through the second flue gas channel 106 .

[0102] After lime silo 1 sprays fresh adsorbent into main flue gas duct 101, the flue gas enters ceramic tube integrated reactor 2 for desulfurization, denitrification, and dust removal. The purified flue gas is then directed through flue gas outlet 202 of ceramic integrated system 2 via an induced draft fan and discharged into a chimney. In some embodiments, induced draft fan 6 directs purified air into heater 114, where it serves as dilution air for heating the high-temperature flue gas and as a flow rate regulator for the flue gas inlet to cyclone tower 501.

[0103] The auxiliary desulfurization device 4 includes a conditioning tower 401 . The conditioning tower 401 is in communication with the first flue gas channel 105 . A static mixer 404 is arranged in the first flue gas channel 105 .

[0104] A venturi tube 402 and a purified air introduction interface 116 are provided at the bottom of the conditioning tower 401 to adjust the velocity of the flue gas entering the conditioning tower.

[0105] In this embodiment, when the sulfide concentration in the flue gas is high, the second valve 110 provided on the third flue gas channel 107 is closed, the cyclone tower 401 in the adsorbent recycling device 5 is omitted, and the second delivery pipeline 203 stops adding old adsorbent to the adsorbent recycling device.

[0106] The lime silo 1 adds new adsorbent to the adsorbent recycling device 4 through the first delivery pipe 103, and the adsorbent recycling device 5 directly sprays the new adsorbent into the first flue gas channel.

[0107] In this embodiment, the middle diamond-shaped powder storage tank 502 is connected to the first conveying pipe 103, and new adsorbent is sprayed into the middle diamond-shaped powder storage tank 502 through the first conveying pipe 103. The lower outlet of the middle diamond-shaped powder storage tank is connected to a screw conveyor, and the screw conveyor sprays new adsorbent into the first flue gas channel 105 through the fifth conveying pipe 115.

[0108] The fluidized tank 503 is connected to the first conveying pipe 103 via a periodic powder supply device, and the lime bin 1 adds new adsorbent to the fluidized tank 503 via the first conveying pipe 103. The outlet of the fluidized tank 503 sprays new adsorbent into the first flue gas channel 105 via a pneumatic conveying channel.

[0109] The new adsorbent enters the first flue gas channel 105 , passes through the auxiliary desulfurization device 4 and the second flue gas channel 106 , returns to the main flue gas channel 101 , and finally enters the ceramic tube integrated reactor 2 .

[0110] Within the first flue gas channel 105, a static mixer 404 is positioned at the inlet of the conditioning tower 401. The flue gas enters the static mixer 404 for gas-solid two-phase mixing before entering the conditioning tower 401 for uniform mixing and primary desulfurization. After efficient desulfurization through the auxiliary desulfurization device 4 over a long section, the flue gas returns to the main flue gas channel 101. Fresh adsorbent is sprayed into the flue gas within the first flue gas channel 101 from the lime silo 1 before entering the ceramic tube integrated reactor 2 for secondary desulfurization.

[0111] The above flue gas purification process can be simplified as follows: original flue gas enters the first flue gas channel → adsorbent recycling device sprays old adsorbent into the flue gas → auxiliary desulfurization device → sprays new adsorbent (ammonia) → ceramic tube integrated reactor.

[0112] When the concentration of sulfide in the flue gas is high, the present invention pre-fills the old adsorbent and reuses it, then enters the auxiliary desulfurization device for long-section efficient desulfurization, sprays new adsorbent from the lime bin again in the main flue gas channel, and enters the ceramic tube integrated reactor, thereby increasing the desulfurization reaction time and achieving efficient desulfurization.

[0113] Flue gas purification process three:

[0114] In other embodiments, when the sulfide concentration in the flue gas is low, the first valve 109 on the main flue gas channel 101 can be opened, the fourth valve 112 on the second flue gas channel 106 can be closed, and the fifth valve 113 on the first flue gas channel 105 can be closed. After the kiln flue gas is heated, it is directly sprayed with new adsorbent from the lime silo 1 and then enters the ceramic tube integrated reactor 2.

[0115] In the above embodiments, those skilled in the art will understand that high-sulfur flue gas, relatively high-sulfide flue gas, and relatively low-sulfide flue gas are different. For example, the flue gas generated by a glass furnace using coal-gas fuel generally belongs to high-sulfide flue gas.

[0116] The present invention provides a glass melting furnace flue gas purification system and flue gas purification method, which divide the main flue gas channel into two branches, a first flue gas channel and a second flue gas channel, and sequentially arrange an adsorbent recycling device and an auxiliary desulfurization device on the first flue gas channel, thereby improving the desulfurization capacity of high-sulfide flue gas.

[0117] The present invention provides a glass melting furnace flue gas purification system and flue gas purification method, which injects new adsorbent from the lime silo and old adsorbent filtered after the ceramic tube integrated reactor into a set old adsorbent recycling device, reuses the old adsorbent, effectively improves the desulfurization efficiency, realizes the efficient utilization of the adsorbent, and thus greatly reduces the amount of solid waste.

[0118] The present invention provides a glass melting furnace flue gas purification system and flue gas purification method, which set valves in different flue gas channels to control the direction of flue gas, and implement different purification processes for different concentrations of sulfides, making the glass melting furnace flue gas purification system more flexible in flue gas purification.

[0119] Other embodiments of the present invention will be readily apparent to those skilled in the art from the description and practice of the invention disclosed herein. The description and embodiments are intended to be exemplary only, and the true scope and spirit of the present invention are defined by the claims.

Claims

1. A glass melting furnace flue gas purification system, characterized in that: The system comprises: The lime silo, ammonia zone and ceramic tube integrated reactor are used for desulfurization, denitrification and dust removal of flue gas in the main flue gas channel; The first flue gas channel branched from the main flue gas channel has an adsorbent recycling device and an auxiliary desulfurization device arranged in sequence on the first flue gas channel, the top of the auxiliary desulfurization device is connected to the main flue gas channel through the second flue gas channel; the auxiliary desulfurization device is connected to the top of the adsorbent recycling device through the third flue gas channel; the top of the adsorbent recycling device is connected to the second flue gas channel through the fourth flue gas channel; The lime silo is connected to the adsorbent recycling device through a first delivery pipe, and is used to selectively add new adsorbent to the adsorbent recycling device according to the sulfide concentration of the flue gas discharged from the glass melting furnace; The bottom of the ceramic tube integrated reactor is connected to the adsorbent recycling device through a second delivery pipe, which is used to selectively add old adsorbent to the adsorbent recycling device according to the sulfide concentration of the flue gas discharged from the glass melting furnace; The adsorbent recycling device is in communication with the first flue gas channel to add new adsorbent and / or old adsorbent to the flue gas therein; The main smoke channel is provided with a first valve, which is arranged in the middle of the two interfaces of the main smoke channel connecting the first smoke channel and the second smoke channel. The first smoke channel is provided with a fifth valve, which is used to control the smoke from entering the first smoke channel when the first valve is closed and the fifth valve is open, and to control the smoke from entering the main smoke channel when the first valve is open and the fifth valve is closed. A second valve is provided on the third flue gas channel for controlling the flue gas in the auxiliary desulfurization device to enter the adsorbent recycling device in an open state; A third valve is provided on the second flue gas channel, for controlling the flue gas in the auxiliary desulfurization device to enter the second flue gas channel when in an open state; A fourth valve is further provided on the second smoke channel, for controlling the smoke in the second smoke channel to enter the main smoke channel when in an open state; The fourth flue gas channel is provided with a sixth valve for controlling the flue gas in the adsorbent recycling device to enter the second flue gas channel when in an open state; The system is also used to transfer the required adsorbent from the lime silo and / or the ceramic tube integrated reactor to the adsorbent recycling device according to the sulfide concentration in the flue gas, and to control the opening and closing of the valves of each flue gas channel to achieve purification treatment of flue gas with different sulfide concentrations.

2. The system according to claim 1, wherein: The system further includes a waste bin, and the bottom of the ceramic tube integrated reactor is connected to the waste bin via a third delivery pipeline; The adsorbent recycling device is connected to the waste bin through a fourth delivery pipe, and is used to pump the adsorbent in the adsorbent recycling device into the waste bin after the adsorbent usage rate reaches a set value or reaches a set number of cycles.

3. The system according to claim 1, wherein: The auxiliary desulfurization device includes a conditioning tower, which is connected to the first flue gas channel. A static mixer is arranged in the first flue gas channel and is arranged at the interface between the first flue gas channel and the air inlet of the conditioning tower. A venturi tube is provided at the bottom of the conditioning tower to adjust the smoke velocity of the smoke entering the conditioning tower to be no less than 3m / s.

4. The system according to claim 1, wherein: The adsorbent recycling device is provided with a cyclone tower, a middle diamond-shaped powder storage tank and a fluidizing tank; The cyclone tower is used to recover the adsorbent in the flue gas and transmit the recovered adsorbent to the middle diamond-shaped powder storage tank and / or the fluidizing tank; The bottom outlet of the middle diamond-shaped powder storage tank is connected to a screw conveyor, and the old adsorbent is sprayed into the first flue gas channel through the fifth conveying pipe for recycling of the old adsorbent.

5. The system according to claim 4, characterized in that The fluidizing tank is connected to the second delivery pipeline, so that the ceramic tube integrated reactor can spray the old adsorbent into the fluidizing tank through the second delivery pipeline; The outlet of the fluidizing tank sprays the old adsorbent into the first flue gas channel through the pneumatic conveying channel.

6. The system according to claim 1, wherein: The adsorbent recycling device is provided with a cyclone tower, a middle diamond-shaped powder storage tank and a fluidizing tank; The middle diamond-shaped powder storage tank is connected to the first conveying pipe, so that the lime silo can add new adsorbent to the middle diamond-shaped powder storage tank through the first conveying pipe. The lower outlet of the middle diamond-shaped powder storage tank is connected to the screw conveyor, and the new adsorbent is sprayed into the first flue gas channel through the fifth conveying pipe.

7. The system according to claim 6, characterized in that The fluidized tank is connected to the first conveying pipeline via a periodic powder supply device, so that the lime bin can add new adsorbent to the fluidized tank via the first conveying pipeline; The outlet of the fluidizing tank sprays new adsorbent into the first flue gas channel through the pneumatic conveying channel.

8. The system according to any one of claims 1 to 7, characterized in that: When the first valve of the main flue gas channel is closed, the fifth valve of the first flue gas channel is opened, the second valve of the third flue gas channel is opened, the third valve of the second flue gas channel is closed, the sixth valve of the fourth flue gas channel is opened, and the fourth valve of the second flue gas channel is opened, the flue gas discharged from the glass melting furnace sequentially passes through the process of "main flue gas channel - first flue gas channel - adsorbent recycling device adding old adsorbent - auxiliary desulfurization device - adsorbent recycling device - second flue gas channel - main flue gas channel - lime silo adding new adsorbent - ceramic tube integrated reactor" to achieve purification of sulfide flue gas in the first concentration range; When the first valve of the main flue gas channel is closed, the fifth valve of the first flue gas channel is opened, the second valve of the third flue gas channel is closed, the third valve of the second flue gas channel is opened, the sixth valve of the fourth flue gas channel is closed, and the fourth valve of the second flue gas channel is opened, the flue gas discharged from the glass melting furnace passes through the process of "main flue gas channel - first flue gas channel - adsorbent recycling device adding new adsorbent - auxiliary desulfurization device - second flue gas channel - main flue gas channel - lime silo adding new adsorbent - ceramic tube integrated reactor" in sequence to achieve purification of sulfide flue gas in the second concentration range; When the first valve of the main flue gas channel is opened, the fifth valve of the first flue gas channel is closed, and the fourth valve of the second flue gas channel is closed, the flue gas discharged from the glass melting furnace passes through the process of "main flue gas channel-lime silo filled with new adsorbent-ceramic tube integrated reactor" in sequence to achieve purification of sulfide flue gas in the third concentration range.

9. A glass melting furnace flue gas purification method, characterized in that: The implementation of the method is based on the glass melting furnace flue gas purification system according to any one of claims 1 to 8, and includes the following method steps: The kiln flue gas that is lower than the process temperature requirement is heated by the heater and then enters the first flue gas channel. The adsorbent recycling device sprays old adsorbent into the first flue gas channel. The flue gas enters the auxiliary desulfurization device through the first flue gas channel for desulfurization, and enters the adsorbent recycling device through the third flue gas channel to recover the adsorbent in the flue gas. The second delivery pipeline at the bottom of the ceramic tube integrated reactor is used to add old adsorbent to the adsorbent recycling device; After being recycled in the adsorbent recycling device, the old adsorbent is pumped into the waste bin through the fourth conveying pipeline; After the flue gas recovers the adsorbent, it passes through the fourth flue gas channel and the second flue gas channel and returns to the main flue gas channel.

10. A glass melting furnace flue gas purification method, characterized in that: The implementation of the method is based on the glass melting furnace flue gas purification system according to any one of claims 1 to 8, and includes the following method steps: The kiln flue gas which is lower than the process temperature requirement is heated by the heater and then enters the first flue gas channel. The lime silo adds new adsorbent to the adsorbent recycling device through the first delivery pipeline, and the adsorbent recycling device sprays the new adsorbent into the first flue gas channel; The flue gas enters the auxiliary desulfurization device through the first flue gas channel for desulfurization. After desulfurization, the flue gas passes through the second flue gas channel and returns to the main flue gas channel. After the lime silo sprays new adsorbent into the main flue gas channel, the flue gas enters the ceramic tube integrated reactor for desulfurization, denitrification and dust removal treatment.

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