CN212467667U - Desulfurization device for co-processing boiler flue gas and sulfuric acid tail gas - Google Patents
Desulfurization device for co-processing boiler flue gas and sulfuric acid tail gas Download PDFInfo
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- CN212467667U CN212467667U CN202021075051.8U CN202021075051U CN212467667U CN 212467667 U CN212467667 U CN 212467667U CN 202021075051 U CN202021075051 U CN 202021075051U CN 212467667 U CN212467667 U CN 212467667U
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Abstract
The utility model belongs to a desulphurization device for cooperatively treating boiler flue gas and sulfuric acid tail gas; comprises a boiler tail gas system, a desulphurization system and a sulfuric acid production device; the boiler tail gas system comprises a boiler, and a tail gas pipeline of the boiler is connected with a first pressure gauge; the desulfurization system comprises a gas inlet at the middle lower part of the desulfurization tower, a first online analyzer is arranged at a gas outlet at the top of the desulfurization tower, a first packing layer is arranged at the inner upper part of the desulfurization tower, a first pressure difference meter, a first upper washing water spraying device and a first lower washing water spraying device are arranged between the upper side and the lower side of the first packing layer, and a first washing water recovery device is arranged at the bottom of the first lower washing water spraying device; an outlet of an acid mist catcher of the sulfuric acid production device is connected with an air inlet at the middle lower part of the desulfurizing tower through a sulfuric acid tail gas pressure gauge, a pollutant detector and a first sulfuric acid tail gas delivery valve; the method has the characteristics of reasonable process design, low early-stage investment, low power energy consumption, high desulfurization efficiency, good desulfurization effect and environmental friendliness.
Description
Technical Field
The utility model belongs to the technical field of the desulfurization, specifically be a desulphurization unit of coprocessing boiler flue gas and sulphuric acid tail gas.
Background
In the field of coal chemical industry, a sulfuric acid device is used for carrying out combustion treatment on low-temperature methanol washing acid gas to remove H in the gas2S reacts to produce sulfuric acid product, but SO in tail gas produced by the device2The concentration is about 700mg/m and is far higher than SO in GB31570-2015 discharge Standard for Industrial pollutants for Petroleum refining2Carrying out dry distillation on the tail gas in the same manner as the dry distillation or the dry distillation in the same manner as the2And removing to meet the emission standard requirement and reduce the influence on the surrounding environment. If a tail gas treatment system is separately added to the sulfuric acid device, a large amount of desulfurization equipment is required to be invested to purchase cost and the tail gas treatment system is operatedIn the process, the power consumption of power equipment and the consumption of a desulfurizing agent are increased; the production cost of the sulfuric acid product is high in the process, the economic benefit of the sulfuric acid product is reduced, particularly under the condition that the market price of the sulfuric acid product is low, the operation mode is adopted to directly cause that the sulfuric acid product produced by an enterprise is in a defect state, and the environment is polluted if the operation mode is not adopted.
SUMMERY OF THE UTILITY MODEL
Not enough to prior art, the utility model provides a desulphurization unit of coprocessing boiler flue gas and sulphuric acid tail gas has solved sulphuric acid tail gas and has not handled then there is the environmental protection problem, then the problem that economic benefits is poor is caused to the cost-prohibitive during processing.
In order to achieve the above purpose, the utility model adopts the technical scheme that:
a kind of desulfurization device which has no pressure boost and co-processes the boiler flue gas and sulfuric acid tail gas, the device includes: at least one set of boiler tail gas system and a desulfurization system for desulfurizing the boiler tail gas; at least one set for H2A sulfuric acid production device for preparing sulfuric acid from S gas; the boiler tail gas system comprises a boiler, and a tail gas pipeline of the boiler is connected with a first pressure gauge; the desulfurization system comprises a gas inlet at the middle lower part of the desulfurization tower connected with a first pressure gauge, a first online analyzer is arranged at a gas outlet at the top of the desulfurization tower, a first packing layer is arranged at the inner upper part of the desulfurization tower, a first pressure difference gauge, a first upper washing water spraying device and a first lower washing water spraying device are arranged between the upper side and the lower side of the first packing layer, a first washing water recovery device is arranged at the bottom of the first lower washing water spraying device, the first washing water recovery device is connected with the upper part of the water cooling tower through a water return pump, and the bottom of the water cooling tower is respectively connected with the first upper washing water spraying device and the first lower washing water spraying device through a water feeding pump; an outlet of an acid mist catcher in the sulfuric acid production device is connected with an air inlet at the middle lower part of the desulfurizing tower through a sulfuric acid tail gas pressure gauge, a pollutant detector and a first sulfuric acid tail gas air supply valve; the pressure displayed in the sulfuric acid tail gas pressure gauge is greater than the pressure displayed in the first pressure gauge.
Preferably, the boiler is connected with a first pressure gauge through an induced draft fan and a first boiler flue gas air supply valve.
Preferably, the device also comprises at least one standby desulfurizing tower, wherein the gas inlet at the middle lower part of the standby desulfurizing tower is respectively connected with the third end of the first tee joint and the third end of the second tee joint; the top gas outlet department of reserve desulfurizing tower is equipped with the second on-line analyzer, the interior upper portion of reserve desulfurizing tower is equipped with the second packing layer, be equipped with the second pressure difference table between the upper and lower both sides of second packing layer, wash water spray set and wash water spray set under the second on the second, wash water spray set's under the second bottom is equipped with second sparge water recovery unit, second sparge water recovery unit passes through the return water pump and links to each other with the upper portion of cooling tower, the bottom of cooling tower is passed through the upper water pump and is linked to each other with wash water spray set and wash water spray set under second respectively.
Preferably, the first tee joint is arranged between the induced draft fan and the first boiler flue gas feed valve; the second tee joint is arranged between the pollutant detector and the first sulfuric acid tail gas air feeding valve.
Preferably, a second boiler flue gas feeding valve and a second pressure gauge are sequentially arranged between the third end of the first tee joint and the gas inlet at the middle lower part of the standby desulfurization tower; and a second sulfuric acid tail gas air supply valve is arranged between the third end of the second tee joint and the air inlet at the middle lower part of the standby desulfurizing tower.
Preferably, the sulfuric acid production plant comprises H2S gas line, H2The S gas pipeline is respectively connected with the torch part and the sulfuric acid production part; the torch part comprises2S a torch valve connected with the gas pipeline and a torch connected with the torch valve; the sulfuric acid production part comprises2And the sulfuric acid valve is connected with the S gas pipeline and is connected with the acid mist catcher through the combustor, the reactor and the sulfuric acid steam condenser.
Preferably, a third tee joint, a first cut-off valve and a third pressure gauge are sequentially arranged between the sulfuric acid steam condenser and the acid mist catcher; a second block valve and a fourth tee joint are sequentially arranged between the pollutant detector and the second tee joint; a near pipeline with a third stop valve is arranged between the third end of the third tee joint and the third end of the fourth tee joint.
Preferably, a first filler flushing valve is arranged at the inlet end of the first upper flushing water spraying device, and a second filler flushing valve is arranged at the inlet end of the first lower flushing water spraying device; a third filler flushing valve is arranged at the inlet end of the second upper washing water spraying device; and a fourth filler flushing valve is arranged at the inlet end of the second lower flushing water spraying device.
Preferably, the device further comprises a control system, wherein the control system comprises a DCS main control card and an overpressure alarm module; the signal input of the DCS main control card is respectively connected with a first pressure gauge, a sulfuric acid tail gas pressure gauge, a second pressure gauge, a third pressure gauge, a first pressure difference gauge and a second pressure difference gauge; the signal output end of the DCS main control card is respectively connected with the overpressure alarm module, the first boiler flue gas feeding valve, the second boiler flue gas feeding valve, the first filler flushing valve, the second filler flushing valve, the third filler flushing valve, the fourth filler flushing valve, the first cut-off valve, the second cut-off valve, the third cut-off valve, the first sulfuric acid tail gas feeding valve and the second sulfuric acid tail gas feeding valve.
The boiler tail gas system, the sulfuric acid production device and the desulfurization system are arranged, so that the boiler flue gas and the sulfuric acid tail gas can be cooperatively treated under the condition of no pressurization, the aim of simultaneously desulfurizing the boiler flue gas and the sulfuric acid tail gas is fulfilled, namely, the desulfurization device of the utility model can be suitable for simultaneously desulfurizing the boiler flue gas and the sulfuric acid tail gas, and in the actual production process, the tail gas of the sulfuric acid production device can be integrated into the boiler tail gas desulfurization system, the boiler tail gas can be integrated into the sulfuric acid production device tail gas desulfurization system or the boiler flue gas and the sulfuric acid tail gas can share one set of desulfurization system, the mode can be conveniently reformed in the existing equipment or can realize the purpose that the flue gas and the tail gas share one set of desulfurization equipment, so as to achieve the characteristics of saving equipment investment and reducing equipment floor area; meanwhile, the boiler flue gas and the sulfuric acid tail gas are subjected to unpowered cooperative treatment, namely the purpose of simultaneously desulfurizing the flue gas and the tail gas is realized on the premise of not using power to pressurize the tail gas, so that the power consumption of power equipment can be reduced, and the purpose of improving the desulfurization efficiency can be realized; the utility model realizes the key of the boiler flue gas and sulfuric acid tail gas desulfurization without pressurization and coprocessing, and the key lies in that the sulfuric acid production device part forms a positive pressure area, and simultaneously, the boiler tail gas and the chimney effect of the desulfurizing tower jointly form a low pressure area, thereby establishing a boiler flue gas conveying system and a sulfuric acid tail gas conveying system to achieve the purpose of coprocessing the flue gas and the tail gas simultaneously; the device has the characteristics of simple structure, reasonable flow design, less early investment, less power energy consumption, high desulfurization efficiency, environmental friendliness, good desulfurization effect and convenience in maintenance.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a schematic diagram of the control principle of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
Referring to FIGS. 1-2: the utility model relates to a desulfurization device of coprocessing boiler flue gas and sulphuric acid tail gas, the device includes: at least one set of boiler tail gas system and a desulfurization system for desulfurizing the boiler tail gas; at least one set for H2A sulfuric acid production device for preparing sulfuric acid from S gas; the boiler tail gas system comprises a boiler 1, and a tail gas pipeline of the boiler 1 is connected with a first pressure gauge 4; the desulfurization system comprises a gas inlet at the middle lower part of a desulfurization tower 5 connected with a first pressure gauge 4, a first online analyzer 18 is arranged at a gas outlet at the top of the desulfurization tower 5, a first packing layer 48 is arranged at the inner upper part of the desulfurization tower 5, and a first pressure gauge 28 and a first upper washing water spray device 4 are arranged between the upper side and the lower side of the first packing layer 481, a first lower washing water spraying device 43, wherein a first washing water recovery device 44 is arranged at the bottom of the first lower washing water spraying device 43, the first washing water recovery device 44 is connected with the upper part of the water cooling tower 20 through a water return pump 42, and the bottom of the water cooling tower 20 is respectively connected with the first upper washing water spraying device 41 and the first lower washing water spraying device 43 through an upper water pump 22; an outlet of an acid mist catcher 10 in the sulfuric acid production device is connected with an air inlet at the middle lower part of the desulfurizing tower 5 through a sulfuric acid tail gas pressure gauge 12, a pollutant detector 13 and a first sulfuric acid tail gas air feeding valve 14; the pressure indicated in the sulfuric acid off-gas pressure gauge 12 is greater than the pressure indicated in the first pressure gauge 4. Boiler 1 links to each other with first manometer 4 through draught fan 2 and first boiler flue gas air feed valve 3. The device also comprises at least one standby desulfurizing tower 9, wherein an air inlet at the middle lower part of the standby desulfurizing tower 9 is respectively connected with a third end of the first tee joint 6 and a third end of the second tee joint 15; a second online analyzer 19 is arranged at a top gas outlet of the standby desulfurizing tower 9, a second packing layer 49 is arranged at the inner upper part of the standby desulfurizing tower 9, a second pressure difference meter 32, a second upper washing water spraying device 45 and a second lower washing water spraying device 46 are arranged between the upper side and the lower side of the second packing layer 49, a second washing water recovery device 47 is arranged at the bottom of the second lower washing water spraying device 46, the second washing water recovery device 47 is connected with the upper part of the water cooling tower 20 through a water return pump 42, and the bottom of the water cooling tower 20 is connected with the second upper washing water spraying device 45 and the second lower washing water spraying device 46 through an upper water pump 22. The first tee joint 6 is arranged between the induced draft fan 2 and the first boiler flue gas feed valve 3; a second tee 15 is provided between the contaminant detector 13 and the first sulphuric acid off-gas feed valve 14. A second boiler flue gas feed valve 7 and a second pressure gauge 8 are sequentially arranged between the third end of the first tee joint 6 and the air inlet at the middle lower part of the standby desulfurization tower 9; and a second sulfuric acid tail gas air feeding valve 16 is arranged between the third end of the second tee joint and the air inlet at the middle lower part of the standby desulfurizing tower 9. The sulfuric acid production device comprises H2S gas line 17, H2The S gas pipeline 17 is respectively connected with the torch part and the sulfuric acid production part; the torch part comprises2A flare valve 33 connected to the S gas pipe 17 and a flare 34 connected to the flare valve 33; sulfuric acid production department bagDraw together with H2And the sulfuric acid valve 21 is connected with the S gas pipeline 17, and the sulfuric acid valve 21 is connected with the acid mist catcher 10 through a burner 23, a reactor 24 and a sulfuric acid steam condenser 26. A third tee joint 30, a first cut-off valve 36 and a third pressure gauge 11 are sequentially arranged between the sulfuric acid vapor condenser 26 and the acid mist catcher 10; a second block valve 37 and a fourth tee 35 are sequentially arranged between the pollutant detector 13 and the second tee 15; a near pipeline with a third stop valve 38 is arranged between the third end of the third tee 30 and the third end of the fourth tee 35. A first filler flushing valve 25 is arranged at the inlet end of the first upper flushing water spraying device 41, and a second filler flushing valve 27 is arranged at the inlet end of the first lower flushing water spraying device 43; the inlet end of the second upper washing water spraying device 45 is provided with a third filler flushing valve 29; the inlet end of the second lower wash water spray 46 is provided with a fourth pad flush valve 31. The device also comprises a control system, wherein the control system comprises a DCS main control card 39 and an overpressure alarm module 40; the signal input of the DCS main control card 39 is respectively connected with a first pressure gauge 4, a sulfuric acid tail gas pressure gauge 12, a second pressure gauge 8, a third pressure gauge 11, a first pressure difference gauge 28 and a second pressure difference gauge 32; the signal output end of the DCS master control card 39 is connected to the overpressure alarm module 40, the first boiler flue gas feed valve 3, the second boiler flue gas feed valve 7, the first packing flushing valve 25, the second packing flushing valve 27, the third packing flushing valve 29, the fourth packing flushing valve 31, the first cut-off valve 36, the second cut-off valve 37, the third cut-off valve 38, the first sulfuric acid tail gas feed valve 14 and the second sulfuric acid tail gas feed valve 16, respectively.
A desulfurization method of a desulfurization device for cooperatively treating boiler flue gas and sulfuric acid tail gas comprises the following steps:
step 1: the DCS main control card 39 controls the second boiler flue gas feed valve 7 to be closed, controls the first boiler flue gas feed valve 3 to be opened, and simultaneously starts the induced draft fan 2; tail gas of the boiler 1 sequentially enters a desulfurizing tower 5 through an induced draft fan 2, a first boiler flue gas feed valve 3 and a first pressure gauge 4 for desulfurization and purification, meanwhile, pressure data of the first pressure gauge 4 is transmitted to a DCS main control card 39, and a boiler flue gas conveying system is established;
step 2: after the boiler flue gas conveying system is established, the pressure difference data in the first pressure difference meter 28 is transmitted to the DCS main control card 39; when the pressure difference in the first pressure difference meter 28 is less than 200Pa, preparing to carry out desulfurization treatment on the tail gas of the sulfuric acid device; when the pressure difference in the first pressure difference meter 28 is not less than 200Pa, the upper water pump 22 is started, the DCS main control card 39 controls the first filler flushing valve 25 and the second filler flushing valve 27 to be opened, flushing water in the cooling tower 20 enters the first upper flushing water spray device 41 and the first lower flushing water spray device 43 through the upper water pump 22 respectively to flush the upper part and the lower part of the first filler layer 48 so as to reduce the bed resistance of the first filler layer 48 until the pressure difference in the first pressure difference meter 28 is less than 200 Pa;
and step 3: the torch valve 33 is closed, the sulfuric acid valve 21 is opened, H2H in S gas line 172S gas generates sulfuric acid and sulfuric acid tail gas through a combustor 23, a reactor 24 and a sulfuric acid steam condenser 26, the sulfuric acid tail gas enters an acid mist catcher 10 to catch fog drops, a third pressure gauge 11 is used for detecting the pressure of the sulfuric acid tail gas entering the acid mist catcher 10, a sulfuric acid tail gas pressure gauge 12 is used for detecting the pressure of the sulfuric acid tail gas entering the mist drops to be caught, the pressure data of the third pressure gauge 11 and the pressure data of the sulfuric acid tail gas pressure gauge 12 respectively enter a DCS main control card 39, when the pressure difference between the third pressure gauge 11 and the sulfuric acid tail gas pressure gauge 12 is not less than 1000Pa, the DCS main control card 39 controls an overpressure alarm module 40 to alarm, controls a first cut-off valve 36 and a second cut-off valve 37 to be closed, opens a third cut-off valve 38, and overhauls; when the pressure difference between the third pressure gauge 11 and the sulfuric acid tail gas pressure gauge 12 is smaller than 1000Pa, comparing the pressure difference between the sulfuric acid tail gas pressure gauge 12 and the first pressure gauge 4, when the pressure difference between the sulfuric acid tail gas pressure gauge 12 and the first pressure gauge 4 is larger than 2000Pa, the DCS main control card 39 controls the first sulfuric acid tail gas air feeding valve 14 to be opened, the sulfuric acid tail gas after the fog drops are captured and the boiler tail gas enter the desulfurizing tower 5 together for desulfurization and purification, and a sulfuric acid tail gas conveying system is established; at this time, the pressure of the sulfuric acid tail gas is controlled from H2S, driving by gas pressure and combustion air pressure to overcome the pressure of a sulfuric acid production part to form a positive pressure area; the pressure of the boiler tail gas is formed by the chimney effect of the induced draft fan 2 and the desulfurizing tower 5 together to form a low-pressure area; through the third pressure gaugeThe pressure difference between the pressure gauge 11 and the sulfuric acid tail gas pressure gauge 12 and the pressure difference in the first pressure difference gauge 28 ensure that the pressure difference between the sulfuric acid tail gas pressure gauge 12 and the first pressure gauge 4 is greater than 2000Pa, so that the desulphurization of the boiler flue gas and the sulfuric acid tail gas by the non-pressurization co-processing method is realized;
and 4, step 4: after the sulfuric acid tail gas conveying system is established, the pollutant detector 13 monitors the sulfur dioxide concentration of the sulfuric acid tail gas after fog drops are trapped in real time, and the first online analyzer 18 monitors the sulfur dioxide concentration at the outlet of the desulfurizing tower 5 in real time; monitoring the data in real time provides a basis for desulfurization operation so as to ensure that the tail gas reaches the standard and is discharged outside;
and 5: after the operation is continued for a period of time, when the pressure difference in the first pressure difference meter 28 is not less than 200Pa, the upper water pump 22 is started, the DCS main control card 39 controls the first filler flushing valve 25 and the second filler flushing valve 27 to be opened, flushing water in the cooling water tower 20 enters the first upper flushing water spray device 41 and the first lower flushing water spray device 43 through the upper water pump 22 respectively to flush the upper part and the lower part of the first filler layer 48 so as to reduce the bed resistance of the first filler layer 48, and when the flushing cannot enable the pressure difference in the first pressure difference meter 28 to be less than 200Pa, the standby desulfurizing tower 9 is started;
step 6: the DCS main control card 39 controls the first boiler flue gas feeding valve 3 to be closed, controls the second boiler flue gas feeding valve 7 to be opened, and simultaneously starts the induced draft fan 2; tail gas of the boiler 1 sequentially passes through an induced draft fan 2, a second boiler flue gas feed valve 7 and a second pressure gauge 8 to enter a standby desulfurizing tower 9 for desulfurization and purification, meanwhile, pressure data of the second pressure gauge 8 is transmitted to a DCS main control card 39, and a boiler flue gas conveying system is established;
and 7: after the boiler flue gas conveying system is established, the pressure difference data in the second pressure difference meter 32 is transmitted to the DCS main control card 39; when the pressure difference in the second pressure difference meter 32 is less than 200Pa, preparing to carry out desulfurization treatment on the tail gas of the sulfuric acid device; when the pressure difference in the second pressure difference meter 32 is not less than 200Pa, the upper water pump 22 is started, the DCS main control card 39 controls the third filler flushing valve 29 and the fourth filler flushing valve 31 to be opened, flushing water in the water cooling tower 20 enters the second upper flushing water spraying device 45 and the second lower flushing water spraying device 46 through the upper water pump 22 respectively to flush the upper part and the lower part of the second filler layer 49 so as to reduce the bed resistance of the second filler layer 49 until the pressure difference in the second pressure difference meter 32 is less than 200 Pa;
and 8: the torch valve 33 is closed, the sulfuric acid valve 21 is opened, H2H in S gas line 172S gas generates sulfuric acid and sulfuric acid tail gas through a combustor 23, a reactor 24 and a sulfuric acid steam condenser 26, the sulfuric acid tail gas enters an acid mist catcher 10 to catch fog drops, a third pressure gauge 11 is used for detecting the pressure of the sulfuric acid tail gas entering the acid mist catcher 10, a sulfuric acid tail gas pressure gauge 12 is used for detecting the pressure of the sulfuric acid tail gas entering the mist drops to be caught, the pressure data of the third pressure gauge 11 and the pressure data of the sulfuric acid tail gas pressure gauge 12 respectively enter a DCS main control card 39, when the pressure difference between the third pressure gauge 11 and the sulfuric acid tail gas pressure gauge 12 is not less than 1000Pa, the DCS main control card 39 controls an overpressure alarm module 40 to alarm, controls a first cut-off valve 36 and a second cut-off valve 37 to be closed, opens a third cut-off valve 38, and overhauls; when the pressure difference between the third pressure gauge 11 and the sulfuric acid tail gas pressure gauge 12 is smaller than 1000Pa, comparing the pressure difference between the sulfuric acid tail gas pressure gauge 12 and the second pressure gauge 8, when the pressure difference between the sulfuric acid tail gas pressure gauge 12 and the second pressure gauge 8 is larger than 2000Pa, controlling the second sulfuric acid tail gas air feeding valve 16 to be opened by the DCS main control card 39, enabling the sulfuric acid tail gas after the fog drops are captured and the boiler tail gas to jointly enter the standby desulfurizing tower 9 for desulfurization and purification, and establishing a sulfuric acid tail gas conveying system; at this time, the pressure of the sulfuric acid tail gas is controlled from H2S, driving by gas pressure and combustion air pressure to overcome the pressure of a sulfuric acid production part to form a positive pressure area; the pressure of the boiler tail gas is formed by the chimney effect of the induced draft fan 2 and the standby desulfurizing tower 9 together to form a low-pressure area; the pressure difference between the sulfuric acid tail gas pressure gauge 12 and the second pressure gauge 8 is ensured to be larger than 2000Pa by the pressure difference between the third pressure gauge 11 and the sulfuric acid tail gas pressure gauge 12 and the pressure difference in the second pressure difference gauge 32, so that the desulphurization of the boiler flue gas and the sulfuric acid tail gas without pressurization and cooperative treatment is realized;
and step 9: after the sulfuric acid tail gas conveying system is established, the pollutant detector 13 monitors the sulfur dioxide concentration of the sulfuric acid tail gas after fog drops are trapped in real time, and the second online analyzer 19 monitors the sulfur dioxide concentration at the outlet of the standby desulfurizing tower 9 in real time; monitoring the data in real time provides a basis for desulfurization operation so as to ensure that the tail gas reaches the standard and is discharged outside;
step 10: after the operation is continued for a period of time, when the pressure difference in the second pressure difference meter 32 is not less than 200Pa, the upper water pump 22 is started, the DCS main control card 39 controls the third filler flushing valve 29 and the fourth filler flushing valve 31 to be opened, flushing water in the cooling water tower 20 enters the second upper flushing water spray device 45 and the second lower flushing water spray device 46 through the upper water pump 22 respectively to flush the upper part and the lower part of the second filler layer 49 so as to reduce the bed resistance of the second filler layer 49, and when the flushing cannot enable the pressure difference in the second pressure difference meter 32 to be less than 200Pa, the desulfurizing tower 5 is started; repeating the steps 1 to 5 when the desulfurizing tower 5 is started;
step 11: when the sulfuric acid production part fails in the operation process of the steps 1 to 10, the sulfuric acid valve 21 is closed, the torch valve 33 is opened, and H is carried out2H in S gas line 172S gas enters a torch 34 through a torch valve 33 to be combusted and discharged;
step 12: when the upper part and the lower part of the first packing layer 48 are washed in the first upper washing water spraying device 41 and the first lower washing water spraying device 43 in the steps 2 and 5, washing water enters the first washing water recovery device 44 and is circulated to the water cooling tower 20 through the water return pump 42;
step 13: when the upper and lower portions of the second packing layer 49 are washed in the second upper washing water shower device 45 and the second lower washing water shower device 46 in the steps 7 and 10, the washing water enters the second washing water recovery device 47 and is circulated to the cooling tower 20 by the return water pump 42.
The desulfurization system adopts an open-standby mode, a plurality of boiler flue gases or a plurality of sets of sulfuric acid tail gases are combined together and enter the desulfurization system together for desulfurization, so that not only can a complete desulfurization system be saved, but also the overall effect of a boiler flue gas desulfurization device can be exerted; through the structure and the process of the utility model can lead SO in the exhaust gas2The concentration is reduced to below 50mg/m to reach the standardThe purpose of the discharge; the structure and the process form have the purposes of reasonable flow design, low investment, low power energy consumption, high desulfurization efficiency and effective improvement of the economic benefit of the sulfuric acid product.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.
The above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.
Claims (9)
1. The utility model provides a desulfurization device of coprocessing boiler flue gas and sulphuric acid tail gas which characterized in that: the device includes:
at least one set of boiler tail gas system and a desulfurization system for desulfurizing the boiler tail gas;
at least one set for H2A sulfuric acid production device for preparing sulfuric acid from S gas;
the boiler tail gas system comprises a boiler (1), and a tail gas pipeline of the boiler (1) is connected with a first pressure gauge (4);
the desulfurization system comprises a gas inlet at the middle lower part of a desulfurization tower (5) connected with a first pressure gauge (4), a first online analyzer (18) is arranged at a gas outlet at the top of the desulfurization tower (5), a first packing layer (48) is arranged at the inner upper part of the desulfurization tower (5), a first pressure gauge (28), a first upper washing water spraying device (41) and a first lower washing water spraying device (43) are arranged between the upper side and the lower side of the first packing layer (48), a first washing water recovery device (44) is arranged at the bottom of the first lower washing water spraying device (43), the first washing water recovery device (44) is connected with the upper part of a water cooling tower (20) through a water return pump (42), and the bottom of the water cooling tower (20) is respectively connected with the first upper washing water spraying device (41) and the first lower washing water spraying device (43) through an upper water pump (22);
an outlet of an acid mist catcher (10) in the sulfuric acid production device is connected with an air inlet at the middle lower part of the desulfurizing tower (5) through a sulfuric acid tail gas pressure gauge (12), a pollutant detector (13) and a first sulfuric acid tail gas air feeding valve (14);
the pressure displayed in the sulfuric acid tail gas pressure gauge (12) is greater than the pressure displayed in the first pressure gauge (4).
2. The desulfurization device for co-processing boiler flue gas and sulfuric acid tail gas according to claim 1, characterized in that: boiler (1) links to each other with first manometer (4) through draught fan (2) and first boiler flue gas air feed valve (3).
3. The desulfurization device for co-processing boiler flue gas and sulfuric acid tail gas according to claim 1, characterized in that: the device also comprises at least one standby desulfurizing tower (9), wherein a gas inlet at the middle lower part of the standby desulfurizing tower (9) is respectively connected with a third end of the first tee joint (6) and a third end of the second tee joint (15);
a second online analyzer (19) is arranged at a top gas outlet of the standby desulfurizing tower (9), a second packing layer (49) is arranged at the inner upper part of the standby desulfurizing tower (9), a second pressure difference meter (32) is arranged between the upper side and the lower side of the second packing layer (49), a second upper washing water spray device (45) and a second lower washing water spray device (46), a second washing water recovery device (47) is arranged at the bottom of the second lower washing water spray device (46), the second washing water recovery device (47) is connected with the upper part of the water cooling tower (20) through a water return pump (42), and the bottom of the water cooling tower (20) is connected with the second upper washing water spray device (45) and the second lower washing water spray device (46) through an upper water pump (22).
4. The desulfurization device for co-processing boiler flue gas and sulfuric acid tail gas according to claim 3, characterized in that: the first tee joint (6) is arranged between the induced draft fan (2) and the first boiler flue gas feed valve (3); the second tee joint (15) is arranged between the pollutant detector (13) and the first sulfuric acid tail gas air feed valve (14).
5. The desulfurization device for co-processing boiler flue gas and sulfuric acid tail gas according to claim 3, characterized in that: a second boiler flue gas feeding valve (7) and a second pressure gauge (8) are sequentially arranged between the third end of the first tee joint (6) and a gas inlet at the middle lower part of the standby desulfurizing tower (9);
a second sulfuric acid tail gas air feeding valve (16) is arranged between the third end of the second tee joint and the air inlet at the middle lower part of the standby desulfurizing tower (9).
6. The desulfurization device for co-processing boiler flue gas and sulfuric acid tail gas according to claim 1, characterized in that: the sulfuric acid production device comprises H2S gas line (17), H2The S gas pipeline (17) is respectively connected with the torch part and the sulfuric acid production part;
the torch part comprises2A torch valve (33) connected with the S gas pipeline (17) and a torch (34) connected with the torch valve (33);
the sulfuric acid production part comprises2And the sulfuric acid valve (21) is connected with the S gas pipeline (17), and the sulfuric acid valve (21) is connected with the acid mist catcher (10) through a burner (23), a reactor (24) and a sulfuric acid steam condenser (26).
7. The desulfurization device for co-processing boiler flue gas and sulfuric acid tail gas according to claim 6, characterized in that: a third tee joint (30), a first cut-off valve (36) and a third pressure gauge (11) are sequentially arranged between the sulfuric acid vapor condenser (26) and the acid mist catcher (10); a second block valve (37) and a fourth tee joint (35) are sequentially arranged between the pollutant detector (13) and the second tee joint (15);
a near pipeline with a third stop valve (38) is arranged between the third end of the third tee joint (30) and the third end of the fourth tee joint (35).
8. The desulfurization device for co-processing boiler flue gas and sulfuric acid tail gas according to claim 1, characterized in that: a first filler flushing valve (25) is arranged at the inlet end of the first upper washing water spraying device (41), and a second filler flushing valve (27) is arranged at the inlet end of the first lower washing water spraying device (43); the inlet end of the second upper washing water spray device (45) is provided with a third filler flushing valve (29); the inlet end of the second lower washing water spray device (46) is provided with a fourth filler flushing valve (31).
9. The desulfurization device for co-processing boiler flue gas and sulfuric acid tail gas according to claim 1, characterized in that: the device also comprises a control system, wherein the control system comprises a DCS main control card (39), and the signal input of the DCS main control card (39) is respectively connected with a first pressure gauge (4), a sulfuric acid tail gas pressure gauge (12), a second pressure gauge (8), a third pressure gauge (11), a first pressure difference gauge (28) and a second pressure difference gauge (32); the signal output end of the DCS main control card (39) is respectively connected with the overpressure alarm module (40), the first boiler flue gas air feeding valve (3), the second boiler flue gas air feeding valve (7), the first packing flushing valve (25), the second packing flushing valve (27), the third packing flushing valve (29), the fourth packing flushing valve (31), the first cut-off valve (36), the second cut-off valve (37), the third cut-off valve (38), the first sulfuric acid tail gas air feeding valve (14) and the second sulfuric acid tail gas air feeding valve (16).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021075051.8U CN212467667U (en) | 2020-06-11 | 2020-06-11 | Desulfurization device for co-processing boiler flue gas and sulfuric acid tail gas |
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| CN202021075051.8U CN212467667U (en) | 2020-06-11 | 2020-06-11 | Desulfurization device for co-processing boiler flue gas and sulfuric acid tail gas |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116603369A (en) * | 2023-04-28 | 2023-08-18 | 成都益志科技有限责任公司 | Absorbent capable of efficiently absorbing sulfur dioxide |
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2020
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116603369A (en) * | 2023-04-28 | 2023-08-18 | 成都益志科技有限责任公司 | Absorbent capable of efficiently absorbing sulfur dioxide |
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Address after: 332700 Jishan Industrial Park, Pengze, Jiujiang, Jiangxi Patentee after: Jiangxi xinlianxin Chemical Industry Co.,Ltd. Address before: 332700 Jishan Industrial Park, Pengze, Jiujiang, Jiangxi Patentee before: Jiujiang Xinlianxin Chemical Fertilizer Co.,Ltd. |
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