CN216878716U - Auxiliary facility of active coke desulfurization and denitrification equipment - Google Patents
Auxiliary facility of active coke desulfurization and denitrification equipment Download PDFInfo
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- CN216878716U CN216878716U CN202220056756.8U CN202220056756U CN216878716U CN 216878716 U CN216878716 U CN 216878716U CN 202220056756 U CN202220056756 U CN 202220056756U CN 216878716 U CN216878716 U CN 216878716U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
The utility model discloses an auxiliary facility of active coke desulfurization and denitrification equipment, which comprises pulping equipment, spraying absorption equipment, concentration and dehydration equipment and wastewater treatment equipment, wherein the pulping equipment is used for preparing slaked lime slurry, the slaked lime slurry is conveyed to the spraying absorption equipment through a pump, the spraying absorption equipment is provided with a secondary absorption spray tower, the first-stage absorption spray tower and the second-stage absorption spray tower are provided with a plurality of layers of spray devices, the bottoms of the first-stage absorption spray tower and the second-stage absorption spray tower share a slurry pool, the plurality of layers of spray devices are used for spraying the slaked lime slurry, the concentration and dehydration equipment is used for concentrating and dehydrating gypsum slurry, and the generated wastewater is pumped to the wastewater treatment equipment. The utility model adopts the 2-level spray tower and multi-layer spraying, thereby increasing the absorption time and improving the treatment effect. The pulping equipment is used for preparing slaked lime slurry, and is not limestone slurry of the traditional process, the reaction activity is stronger, the reaction with SO2 is quicker, and the effect of absorbing SO2 is better.
Description
[ technical field ] A method for producing a semiconductor device
The utility model belongs to the technical field of waste gas treatment, and particularly relates to a desulfurization process facility for treating high-concentration sulfur-containing gas at an outlet of an active coke regeneration tower.
[ background of the utility model ]
The combined active coke desulfurization and denitrification technology is more and more widely applied, is mainly applied to the industries of steel and coking in the early stage, has larger unit scale, has larger amount of high-concentration sulfuric acid-containing tail gas discharged by a regeneration tower at the tail end of a system, and can be used for preparing sulfuric acid. With the application of the activated coke desulfurization and denitrification technology to small unit industrial boilers, the amount of tail gas of a regeneration tower is small, and if the activated coke desulfurization and denitrification technology is used for acid production, the investment cost is too high, the acid production amount is small, and the method is extremely uneconomical.
[ Utility model ] content
The utility model aims to solve the technical problem of overcoming the defects in the prior art, and designs an auxiliary facility of active coke combined desulfurization and denitrification process equipment, which is used for absorbing and treating SO2 gas with small flue gas volume and extremely high concentration.
In order to solve the technical problems, the utility model adopts the following technical scheme: an auxiliary facility of active coke desulfurization and denitrification equipment comprises pulping equipment, spraying absorption equipment, concentration and dehydration equipment and wastewater treatment equipment, wherein the pulping equipment is used for preparing slaked lime slurry, the prepared slaked lime slurry is conveyed to the spraying absorption equipment through a pump, the spraying absorption equipment is provided with a secondary absorption spray tower, a plurality of layers of spray devices are arranged on a first-stage absorption spray tower and a second-stage absorption spray tower, the bottoms of the first-stage absorption spray tower and the second-stage absorption spray tower share one slurry pool, the plurality of layers of spray devices are used for spraying slaked lime slurry, the slurry pool is provided with an air inlet and a gypsum outlet, calcium sulfite in the slurry pool is oxidized into calcium sulfate by introducing air through the air inlet, the calcium sulfate is accumulated at the bottom of the pool, the gypsum outlet is connected with a gypsum discharge pump, the gypsum slurry at the bottom of the pool is concentrated and dehydrated by the concentration and dehydration equipment, and the generated wastewater is pumped to the wastewater treatment equipment, the wastewater treatment equipment is used for realizing wastewater reuse.
Preferably, the tower bodies of the first-stage absorption spray tower and the second-stage absorption spray tower are made of alloy materials and are provided with flange connectors.
Preferably, the tower bodies of the first-stage absorption spray tower and the second-stage absorption spray tower extend downwards into the slurry pool by 300 mm.
Preferably, the top of the second-stage absorption spray tower is provided with a two-stage demister and a flushing port, and the flushing port is connected with a flushing pipe and a flushing pump.
Preferably, the demister is provided with a differential pressure gauge at the upper and lower parts for controlling the flushing pump to automatically start for flushing when the differential pressure is too large.
Preferably, the pulping equipment comprises a steel powder bin for storing the slaked lime powder and a steel water tank arranged below the steel powder bin, wherein a feed opening is formed in the bottom of the steel powder bin and used for feeding the slaked lime powder into the steel water tank, and slaked lime slurry is prepared in the steel water tank.
Preferably, the concentration dehydration equipment comprises a cyclone and a vacuum belt dehydrator, the gypsum slurry enters the cyclone and then undergoes cyclone separation under the action of gravity, and the high-concentration gypsum slurry obtained by separation enters the belt dehydrator for dehydration.
Preferably, the wastewater treatment equipment comprises a steel water tank for storing wastewater, a wastewater reuse pump connected with the steel water tank and a cooling water pipe arranged in the flue gas system, and wastewater in the steel water tank is sent into the cooling water pipe arranged in the flue gas system through the wastewater reuse pump to reduce the temperature of the flue gas.
By adopting the technical scheme, the utility model has the following beneficial effects:
1. aiming at the characteristic that the tail gas of the regeneration tower contains high-concentration SO2 in the active coke combined desulfurization and denitrification technology, a 2-level spray tower is adopted, multi-layer spraying is carried out, the absorption time is prolonged, and the treatment effect is improved.
2. The pulping equipment is used for preparing slaked lime slurry, and is not limestone slurry of the traditional process, the reaction activity is stronger, the reaction with SO2 is quicker, and the effect of absorbing SO2 is better.
3. The treated waste gas returns to a boiler outlet flue gas system, and is not discharged outside, so that secondary pollution is not caused.
4. The system has no waste water discharge and no secondary pollution.
These features and advantages of the present invention will be disclosed in more detail in the following detailed description and the accompanying drawings.
[ description of the drawings ]
The utility model is further described with the following drawings:
FIG. 1 is a schematic structural diagram of the present invention.
In the figure: a pulping device 1; a steel powder bin 11; a steel water tank 12; a spray absorption device 2; a first-stage absorption spray tower 21; a second stage absorption spray tower 22; a slurry tank 23; a spray device 24; a demister 25; a concentration dehydration device 3; a swirler 31; a vacuum belt dehydrator 32; a wastewater treatment facility 4; a steel water tank 41.
[ detailed description ] embodiments
The technical solutions of the embodiments of the present invention are explained and illustrated below with reference to the drawings of the embodiments of the present invention, but the following embodiments are only preferred embodiments of the present invention, and not all embodiments. Based on the embodiments in the implementation, other embodiments obtained by those skilled in the art without any creative effort belong to the protection scope of the present invention.
The utility model aims at the SO2 gas with small flue gas volume and extremely high concentration to carry out absorption treatment, combines the conventional limestone-gypsum desulfurization method with the active coke combined desulfurization and denitrification technology, absorbs the high-concentration sulfur-containing gas discharged by the regeneration tower by utilizing the small limestone-gypsum method process, and can solve the problems that the tail gas volume of the regeneration tower is small and the regeneration tower cannot be used for preparing acid.
Referring to fig. 1, an auxiliary facility of an active coke desulfurization and denitrification apparatus includes a pulping apparatus 1, a spray absorption apparatus 2, a concentration and dehydration apparatus 3, and a wastewater treatment apparatus 4, the pulping apparatus is used for preparing slaked lime slurry, and the prepared slaked lime slurry is delivered to the spray absorption apparatus by a pump, the spray absorption apparatus 2 is provided with a secondary absorption spray tower, a first stage absorption spray tower 21 and a second stage absorption spray tower 22 are provided with a plurality of layers of spray devices 24, and the bottoms of the spray towers share a slurry tank 23, the plurality of layers of spray devices are used for spraying slaked lime slurry, the slurry tank is provided with an air inlet and a gypsum outlet, air is introduced through the air inlet to oxidize calcium sulfite in the slurry tank into calcium sulfate which is accumulated at the bottom of the tank, the gypsum outlet is connected with a gypsum discharge pump to pump the gypsum slurry at the bottom of the tank into the concentration and dehydration apparatus, the concentration and dehydration apparatus performs concentration and dehydration on the gypsum slurry, the produced wastewater is pumped to a wastewater treatment facility for wastewater reuse.
Detailed technical description of the secondary spray tower:
the concentration of the SO2 in the flue gas discharged by the general boiler is 2000-8000mg/Nm3The flue gas amount is large, and the tail gas discharged by the regeneration tower is rich in high-concentration SO2 (the concentration can reach 20% mass concentration, and the mass concentration is about 400000mg/Nm3) The smoke amount is smaller, and the smoke amount of the specific application example of the utility model is only 1050Nm3H is used as the reference value. The conventional limestone-gypsum desulfurization apparatus cannot remove such high concentration of SO 2. The utility model adopts two-stage absorption spray towers, each stage of spray tower adopts 4 layers of spray devices, and the spray towers extend into the slurry tank by 300mm, thereby preventing the siphonage phenomenon from occurring when the system is started and stopped.
In this embodiment, the tower bodies of the first-stage absorption spray tower and the second-stage absorption spray tower are made of alloy materials and are provided with flange interfaces. The carbon steel corrosion prevention flow of the conventional spray tower is omitted, and meanwhile, the flange connection is convenient to overhaul and replace. The tower bodies of the first-stage absorption spray tower and the second-stage absorption spray tower extend downwards into the slurry pool by 300 mm.
Furthermore, the top of the second-stage absorption spray tower is provided with a two-stage demister 25 and a flushing port, and the flushing port is connected with a flushing pipe and a flushing pump. And the demister is provided with a differential pressure gauge vertically and is used for controlling the flushing pump to be automatically started for flushing when the differential pressure is overlarge.
Specifically, the pulping equipment 1 comprises a steel powder bin 11 for storing slaked lime powder and a steel water tank 12 arranged below the steel powder bin, wherein a feed opening is formed in the bottom of the steel powder bin and used for feeding the slaked lime powder into the steel water tank, and slaked lime slurry is prepared in the steel water tank. The concentration dewatering equipment 3 comprises a cyclone 31 and a vacuum belt dewatering machine 32, after the gypsum slurry enters the cyclone, cyclone separation is carried out under the action of gravity, and the high-concentration gypsum slurry obtained by separation enters the belt dewatering machine for dewatering. The wastewater treatment equipment 4 comprises a steel water tank 41 for storing wastewater, a wastewater recycling pump connected with the steel water tank, and a cooling water pipe arranged in the flue gas system, wherein the wastewater in the steel water tank is sent into the cooling water pipe arranged in the flue gas system through the wastewater recycling pump, so that the temperature of the flue gas is reduced. The structures of the pulping equipment 1, the spraying absorption equipment 2 and the concentration dehydration equipment 3 are only briefly explained, and the specific structure and the working principle can refer to the prior art.
The above description is only for the embodiments of the present invention, but the scope of the present invention is not limited thereto, and those skilled in the art should understand that the present invention includes but is not limited to the description in the above embodiments and the accompanying drawings. Any modification which does not depart from the functional and structural principles of the utility model is intended to be included within the scope of the claims.
Claims (8)
1. An auxiliary facility of active coke desulfurization and denitrification equipment is characterized by comprising pulping equipment, spraying absorption equipment, concentration and dehydration equipment and wastewater treatment equipment, wherein the pulping equipment is used for preparing slaked lime slurry, the prepared slaked lime slurry is conveyed to the spraying absorption equipment through a pump, the spraying absorption equipment is provided with a secondary absorption spray tower, a plurality of layers of spray devices are arranged on a first-stage absorption spray tower and a second-stage absorption spray tower, the bottoms of the first-stage absorption spray tower and the second-stage absorption spray tower share a slurry pool, the plurality of layers of spray devices are used for spraying slaked lime slurry, the slurry pool is provided with an air inlet and a gypsum outlet, air is introduced through the air inlet to oxidize calcium sulfite in the slurry pool into calcium sulfate, the calcium sulfate is accumulated at the bottom of the pool, the gypsum outlet is connected with a gypsum discharge pump to pump the gypsum slurry at the bottom of the pool into the concentration and dehydration equipment, and the concentration and dehydration equipment is used for concentrating and dehydrating the gypsum slurry, the produced wastewater is pumped to a wastewater treatment facility for wastewater reuse.
2. The auxiliary facility of the active coke desulfurization and denitrification equipment as claimed in claim 1, wherein the tower bodies of the first-stage absorption spray tower and the second-stage absorption spray tower are made of alloy materials and are provided with flange interfaces.
3. The auxiliary facility of the active coke desulfurization and denitrification equipment as claimed in claim 2, wherein the tower bodies of the first-stage absorption spray tower and the second-stage absorption spray tower extend downwards 300mm into the slurry tank.
4. The auxiliary facility of the active coke desulfurization and denitrification equipment as claimed in claim 1, wherein the second-stage absorption spray tower is provided with a two-stage demister at the top and a flushing port, and the flushing port is connected with a flushing pipe and a flushing pump.
5. The auxiliary facility of the activated coke desulfurization and denitrification equipment as claimed in claim 4, wherein a differential pressure gauge is arranged above and below the demister and used for controlling a flushing pump to automatically start to flush when the differential pressure is too large.
6. The auxiliary facility of the activated coke desulfurization and denitrification equipment as claimed in claim 1, wherein the pulping equipment comprises a steel powder bin for storing slaked lime powder and a steel water tank arranged below the steel powder bin, and a feed opening is formed in the bottom of the steel powder bin and used for feeding the slaked lime powder into the steel water tank and preparing slaked lime slurry in the steel water tank.
7. The auxiliary facility of the active coke desulfurization and denitrification equipment according to claim 1, wherein the concentration and dehydration equipment comprises a cyclone and a vacuum belt dehydrator, gypsum slurry enters the cyclone and then undergoes cyclone separation under the action of gravity, and the separated high-concentration gypsum slurry enters the belt dehydrator for dehydration.
8. The auxiliary facility of the active coke desulfurization and denitrification equipment as claimed in claim 1, wherein the wastewater treatment equipment comprises a steel water tank for storing wastewater, a wastewater reuse pump connected with the steel water tank, and a cooling water pipe arranged in the flue gas system, and the wastewater in the steel water tank is sent to the cooling water pipe arranged in the flue gas system through the wastewater reuse pump to reduce the temperature of the flue gas.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220056756.8U CN216878716U (en) | 2022-01-11 | 2022-01-11 | Auxiliary facility of active coke desulfurization and denitrification equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220056756.8U CN216878716U (en) | 2022-01-11 | 2022-01-11 | Auxiliary facility of active coke desulfurization and denitrification equipment |
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| Publication Number | Publication Date |
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| CN216878716U true CN216878716U (en) | 2022-07-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202220056756.8U Active CN216878716U (en) | 2022-01-11 | 2022-01-11 | Auxiliary facility of active coke desulfurization and denitrification equipment |
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| CN (1) | CN216878716U (en) |
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