CN218188915U - Hyperstable semi-dry process desulfurizing tower - Google Patents
Hyperstable semi-dry process desulfurizing tower Download PDFInfo
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- CN218188915U CN218188915U CN202222581399.XU CN202222581399U CN218188915U CN 218188915 U CN218188915 U CN 218188915U CN 202222581399 U CN202222581399 U CN 202222581399U CN 218188915 U CN218188915 U CN 218188915U
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Abstract
The utility model provides a hyperstatic semidry desulfurization tower, which comprises a desulfurization tower, an air inlet pipeline, a dust remover, an exhaust pipeline, an adjusting component and a return pipe; the desulfurizing tower is provided with an air inlet chamber, a transition chamber, a reaction chamber and an air outlet chamber which are sequentially communicated from bottom to top; an air inlet pipeline is communicated with the air inlet chamber; the dust remover is communicated with the air outlet of the air outlet chamber; the exhaust pipeline is communicated with an exhaust port of the dust remover; the adjusting assembly comprises a plurality of adjusting pipes distributed along the circumferential direction of the transition chamber, the air inlet ends of the adjusting pipes are connected to the air inlet chamber, and the air outlet ends of the adjusting pipes are communicated with the transition chamber along the tangential direction of the transition chamber; two ends of the return pipe are respectively communicated with the exhaust pipeline and the air inlet pipeline. The utility model provides a hyperstatic state semidry process desulfurizing tower shunts the flue gas through adjusting part, and the flue gas flow who lets in the reacting chamber reduces, and the velocity of flow reduces, and the flue gas velocity of flow that gets into the reacting chamber is stable, and the flow has guaranteed the stable formation of fluidized bed at controllable within range.
Description
Technical Field
The utility model belongs to the technical field of industrial waste gas handles, concretely relates to hyperstatic semidry process desulfurizing tower.
Background
The sulfur dioxide has strong acidity, and can cause air pollution when being directly discharged into the atmosphere; acid rain can be formed to harm the growth of forests and crops, corrode stone carving and buildings, and influence the quality of the buildings. Fossil energy combustion is a main source of sulfur dioxide, and a flue gas desulfurization technology is one of main means used for eliminating sulfur dioxide in industry.
The existing semi-dry desulfurization scheme is to arrange a desulfurization tower, form high-speed airflow by flue gas through a spraying device, spray circulating ash and atomized water into the desulfurization tower through a circulating ash system and a process water system to contact with the flue gas to form a circulating fluidized bed for flue gas desulfurization. But the adjustable range of the flue gas air quantity and the flue gas flow velocity of the existing desulfurizing tower is low, which is not enough to meet the requirement of adjusting the bed layer of the circulating fluidized bed in the actual engineering operation, the desulfurizing efficiency is low, and the bed layer is unstable; and when the flow of flue gas is large and the flow speed is high, the reaction chamber can not timely carry out desulfurization treatment on the flue gas, and the desulfurization effect is influenced.
SUMMERY OF THE UTILITY MODEL
The embodiment of the utility model provides a hyperstatic semidry desulfurization tower aims at solving among the prior art desulfurizing tower and is difficult to adjust the inside flue gas flow and the flue gas velocity of flow that get into the desulfurizing tower, and the bed instability that the desulfurization formed leads to the problem that desulfurization efficiency is low.
In order to achieve the above object, the utility model adopts the following technical scheme: provided is a hyperstatic semidry desulfurization tower, comprising:
the tower body is provided with an air inlet chamber, a transition chamber, a reaction chamber and an air outlet chamber which are sequentially communicated from bottom to top;
an intake duct communicating with the intake chamber;
the dust remover is communicated with the air outlet of the air outlet chamber;
the exhaust pipeline is communicated with an exhaust port of the dust remover;
the adjusting assembly comprises a plurality of adjusting pipes distributed along the circumferential direction of the transition chamber, each adjusting pipe is provided with a control valve, the air inlet end of each adjusting pipe is connected to the air inlet chamber, and the air outlet end of each adjusting pipe is communicated with the transition chamber along the tangential direction of the transition chamber, or the air inlet end of each adjusting pipe is connected to the air inlet pipeline, and the air outlet end of each adjusting pipe is communicated with the transition chamber along the tangential direction of the transition chamber; and
and the two ends of the return pipe are respectively communicated with the exhaust pipeline and the air inlet pipeline.
In a possible implementation mode, be equipped with circulation ash interface and technology water interface in the reaction chamber, the technology water interface is equipped with the atomizing spray gun, circulation ash interface be used for to spout circulation ash in the reaction chamber, the technology water interface passes through the atomizing spray gun to the atomized water lets in the reaction chamber.
In a possible implementation mode, the spray head of the atomizing spray gun faces the axis of the tower body and is arranged obliquely upwards.
In one possible implementation, the atomizing spray gun is a two-fluid atomizing spray gun.
In one possible implementation, the inner diameter of the upper portion of the transition chamber is greater than the inner diameter of the middle portion of the transition chamber, and the inner diameter of the lower portion of the transition chamber is greater than the inner diameter of the middle portion of the transition chamber.
In a possible implementation manner, the adjusting pipe comprises a first flow section, an adjusting section and a second flow section which are sequentially arranged along the flowing direction of the flue gas, and the adjusting section is provided with the control valve;
and/or an accelerating pipe is arranged between the adjusting section and the second flow section, and the accelerating pipe is a Venturi pipe.
In a possible implementation manner, the adjusting pipe comprises a first flow section, an adjusting section and a second flow section which are sequentially arranged along the flowing direction of the flue gas, and the adjusting section is provided with the control valve;
and/or an accelerating pipe is arranged between the adjusting section and the second flow section, and the accelerating pipe is a Venturi pipe.
Compared with the prior art, the utility model provides a hyperstatic semidry desulfurization tower, on one hand, set up adjusting part and back flow outside the transition chamber, adjusting part communicates with admission line or air inlet chamber, and the back flow communicates with admission line, can balance system resistance in great regulation range, stabilize the operation of desulfurizing tower system; meanwhile, compared with the flue gas in the gas inlet chamber, the flue gas entering the adjusting assembly enters the transition chamber in a delayed manner along the tangential direction of the transition chamber, so that the formed turbulence can be strengthened, the contact between circulating ash particles and the flue gas is increased, the desulfurization efficiency is improved, and the system operation cost is saved; on the other hand, a return pipe is additionally arranged between the exhaust pipeline and the air inlet pipeline, when the flow rate of flue gas entering the reaction chamber is reduced, the concentration is reduced, and the bed layer stability of the fluidized bed is influenced, part of the flue gas which passes through desulfurization returns to the reaction chamber through the return pipe for supplement, so that the stable operation of the circulating fluidized bed is ensured, and the desulfurization efficiency is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the description below are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without inventive labor.
Fig. 1 is a schematic structural diagram of a hyperstatic semi-dry desulfurization tower provided in an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a desulfurizing tower used in an embodiment of the present invention;
FIG. 3 is a cross-sectional view of a transition chamber used in an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a hyperstatic semi-dry desulfurization tower provided by the second embodiment of the present invention.
Description of reference numerals:
1. a desulfurizing tower; 11. an air intake chamber; 12. a transition chamber; 13. a reaction chamber; 131. a circulating ash interface; 132. A process water interface; 14. an air outlet chamber;
2. an air intake duct;
3. a dust remover;
4. an exhaust duct; 41. an induced draft fan;
5. an adjustment assembly; 50. an adjusting tube; 51. a first flow section; 52. an adjustment section; 521. a control valve; 53. a second flow section; 54. an accelerating tube;
6. a return pipe;
7. an atomizing spray gun.
Detailed Description
In order to make the technical problem, technical solution and advantageous effects to be solved by the present invention more clearly understood, the following description is given in conjunction with the accompanying drawings and embodiments to illustrate the present invention in further detail. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
It should be noted that the terms "length," "width," "height," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "head," "tail," and the like, indicate orientations and positional relationships that are based on the orientation or positional relationship shown in the drawings, are used for convenience in describing the invention and to simplify the description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the invention.
It is also noted that, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," "disposed," and the like are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In addition, the meaning of "a plurality" or "a number" is two or more unless specifically limited otherwise.
Referring to fig. 1 to 4, a hyperstatic semi-dry desulfurization tower of the present invention will now be described. The hyperstatic semi-dry desulfurization tower comprises a tower body 1, an air inlet pipeline 2, a dust remover 3, an exhaust pipeline 4, an adjusting component 5 and a return pipe 6. The tower body 1 is provided with an air inlet chamber 11, a transition chamber 12, a reaction chamber 13 and an air outlet chamber 14 which are sequentially communicated from bottom to top; the air inlet pipeline 2 is communicated with the air inlet chamber 11; the dust remover 3 is communicated with an air outlet of the air outlet chamber 14; the exhaust pipeline 4 is communicated with an exhaust port of the dust remover 3; the adjusting assembly 5 comprises a plurality of adjusting pipes 50 distributed along the circumferential direction of the transition chamber 12, each adjusting pipe 50 is provided with a control valve 521, the air inlet end of each adjusting pipe 50 is connected to the air inlet chamber 11, and the air outlet end of each adjusting pipe 50 is connected to the transition chamber 12, or the air inlet end of each adjusting pipe 50 is connected to the air inlet pipeline 2, and the air outlet end of each adjusting pipe 50 is connected to the transition chamber 12; two ends of the return pipe 6 are respectively communicated with the exhaust pipeline 4 and the air inlet pipeline 2.
It should be understood that the hyperstatic semidry desulfurization tower adopted in the embodiment takes the circulating fluidized bed as a principle, and sprays the circulating ash and the atomized water into the flue gas to react the desulfurizing agent with the SO in the flue gas 2 Chemical reaction is carried out, the formed solid powder is scattered in the smoke,the gas-solid mixed flue gas is discharged from the top outlet of the tower body 1 in the side direction and then enters the dust remover 3 for dust removal treatment, and finally the purified flue gas is discharged from a chimney through an exhaust pipeline.
It should be noted that, valves (not shown) are provided on the inlet duct 2, the outlet duct 4, the adjusting component 5 and the return duct 6, the valves are used for adjusting the flow rate of the flue gas flowing through the corresponding ducts, and the return duct 6 is used for re-conveying part of the flue gas entering the outlet duct 4 to the reaction chamber 13, and cooperates with the adjusting component 5 to adjust the flow rate of the flue gas entering the reaction chamber 13.
It should be noted that a plurality of sensors are arranged inside the tower body 1, including but not limited to a temperature sensor, a pressure sensor, a PH detection sensor, a flue gas flow sensor, and an SO 2 The concentration sensor can monitor parameters such as temperature, pressure, environmental state, gas flow velocity and the like in the tower body 1, and each sensor can be respectively in communication connection with a control terminal (such as an industrial personal computer and a tablet personal computer). When some of the parameters change, the staff can react quickly to ensure the normal work of the tower body 1.
It should be noted that the flow direction of the flue gas is shown by the arrows in fig. 2, and the flue gas without desulfurization flows into the air inlet duct 2.
It should be noted that, the adjusting component 5 is communicated with the air inlet pipe 2 or the air inlet chamber 11, the return pipe 6 is communicated with the air inlet pipe 2, when the flue gas treatment amount of the tower body 1 is designed according to the proportion of 30% to 70%, the adjustable proportion of the adjusting component 5 is 70% to 30%, the flue gas amount adjustable range of the return pipe 6 is 0% to 100%, the system resistance can be balanced in a larger adjusting range, and the operation of the desulfurizing tower system is stabilized.
During specific implementation, the adjusting component 5 is used for adjusting the flue gas flow and the flue gas flow velocity entering the gas inlet chamber 11, and as an implementation mode of the adjusting component 5 for adjusting the flue gas flow and the flue gas flow velocity, referring to fig. 1, the gas inlet end of the adjusting component 5 is communicated with the gas inlet chamber 11, after untreated flue gas enters the gas inlet chamber 11, part of the flue gas enters the adjusting component 5, so that the flue gas flow entering the reaction chamber 13 through the transition pipe 12 is reduced within a certain time, and the flue gas flow velocity are controlled within the processing range of the reaction chamber 13. At this time, since all the untreated flue gas enters the inlet chamber 11, a valve is provided in the inlet duct 2 for flow control.
As another embodiment of the adjusting assembly 5 for adjusting the flow rate and the flow velocity of the flue gas, referring to fig. 3, an air inlet end of the adjusting assembly 5 is communicated with the air inlet pipe 2, untreated flue gas is divided in the air inlet pipe 2, a part of the flue gas enters the adjusting assembly 5, and a part of the flue gas enters the air inlet chamber 11, so that the flow rate of the flue gas entering the air inlet chamber 11 is within a controllable range of the reaction chamber 13. Since the flue gas is branched in the intake duct 2, the intake duct 2 in this embodiment may not be provided with a valve.
Compared with the prior art, on one hand, the hyperstatic semidry desulfurization tower provided by the embodiment has the advantages that the adjusting component 5 and the return pipe 6 are additionally arranged outside the transition chamber 12, the adjusting component 5 is communicated with the air inlet pipeline 2 or the air inlet chamber 11, and the return pipe 6 is communicated with the air inlet pipeline 2, so that the system resistance can be balanced in a large adjusting range, and the operation of a desulfurization tower system is stabilized; meanwhile, compared with the flue gas in the air inlet chamber 11, the flue gas entering the adjusting assembly 5 is delayed to enter the transition chamber 12 along the tangential direction of the transition chamber 12, so that the formed turbulence can be strengthened, the contact between circulating ash particles and the flue gas is increased, the desulfurization efficiency is improved, and the system operation cost is saved; on the other hand, the return pipe 6 is additionally arranged between the exhaust pipeline 4 and the air inlet pipeline 2, when the flow rate of the flue gas entering the reaction chamber 13 is reduced, the concentration is reduced, and the bed layer stability of the fluidized bed is influenced, a part of the flue gas which passes through desulfurization returns to the reaction chamber 13 through the return pipe 6 for supplement, so that the stable operation of the circulating fluidized bed is ensured, and the desulfurization efficiency is improved.
In some embodiments, the exhaust end of the exhaust duct 4 is also provided with a valve, and when the reaction chamber 13 fails to desulfurize in time, the valve is closed, and the flue gas which is not completely desulfurized can completely enter the reaction chamber 13 along the return pipe 6 to participate in the reaction, so as to ensure the desulfurization effect of the tower body 1.
In some embodiments, referring to fig. 2, a circulating ash interface 131 and a process water interface 132 are arranged in the reaction chamber 13, the process water interface 132 is provided with an atomizing spray gun 7, the circulating ash interface 131 is used for spraying circulating ash into the reaction chamber 13, and the process water interface 132 feeds atomized water into the reaction chamber through the atomizing spray gun 7. The circulating ash interface 131 is used for injecting circulating ash into the reaction chamber 13, and the process water interface 132 injects atomized water into the reaction chamber through the atomizing spray gun 7 to ensure the stability of the fluidized bed layer.
It should be understood that the circulating ash interface 131 is connected to a circulating ash system for supplementing circulating ash and the process water interface 132 is connected to a process water system for supplementing process water.
It is to be understood that the recycled ash material is lime. The flue gas is fully mixed with the lime slurry in the bed layer, and SO 2 The sulfite and sulfate converted into calcium after being absorbed are partially discharged from the bottom of the tower body 1 and partially enter a dust collector 3.
In some embodiments, fig. 2, the nozzle of the atomizing spray gun 7 faces the axis of the tower body 1 and is arranged obliquely upwards. The flue gas flows from bottom to top, the nozzle of the atomizing spray gun 7 inclines upwards, the sprayed atomized water evaporates rapidly and simultaneously circulates ash particles and SO 2 The contact reaction generates calcium sulfite, increases the collision contact of circulating ash, water molecules and flue gas, improves the desulfurization efficiency, and increases the atomized water, the circulating ash and SO by the inclined upward arrangement mode of the atomizing spray gun 7 2 The reaction time of (2).
In some embodiments, the atomizing spray gun 7 is a two-fluid atomizing spray gun. The atomized particles sprayed by the double-fluid atomization spray gun are very fine, the coverage area of the water mist is large, the contact area with the flue gas is increased, in addition, the consumption of the compressed air is low, and the energy-saving effect is good.
In some embodiments, referring to fig. 1 and 4, the inner diameter of the upper portion of the transition chamber 12 is greater than the inner diameter of the middle portion of the transition chamber 12, and the inner diameter of the lower portion of the transition chamber 12 is greater than the inner diameter of the middle portion of the transition chamber 12. The untreated flue gas is uniformly mixed in the transition chamber 12 at a consistent temperature. The middle part of the transition chamber 12 is narrowed to cause the flow velocity of the flue gas to increase at the narrowed part, turbulent flow is formed to impact each other, the accelerated flue gas enters the reaction chamber 13 to make the by-products on the surface of the desulfurizer in the reaction chamber 13 fall off, and the desulfurizer and SO are mixed again 2 Take place ofAnd the desulfurization efficiency is increased.
In some embodiments, referring to fig. 1, the regulating pipe 50 comprises a first flow section 51, a regulating section 52 and a second flow section 53 which are arranged in sequence along the flow direction of the flue gas, and the regulating section 52 is provided with a control valve 521; and/or, an accelerating tube 54 is arranged between the adjusting section 52 and the second flow section 53, and the accelerating tube 54 is a venturi tube. The conditioning segment 52 is capable of controlling the flow of flue gas through the conditioning duct 50 into the transition chamber 12.
It should be noted that the adjustment section 52 is adjacent to the upper portion of the transition chamber 12, and the length of the first flow section 51 is greater than the length of the second flow section 53.
The regulating pipe 50 provided with the accelerating pipe 54 can accelerate the flue gas flowing through, increase the initial speed of the flue gas entering the reaction chamber 13 and strengthen the fluidized bed layer.
The inner diameter of the accelerating tube 54 is gradually reduced and then gradually increased along the flowing direction of the flue gas, the gas flow channel is narrowed when the flue gas flows through the contraction section, the flow velocity is increased due to the pressurized flue gas, and the accelerating tube 54 can increase the flow velocity of the flue gas entering the reaction chamber 13, so that the effect of strengthening the fluidized bed layer is achieved.
In some embodiments, the dust collector 3 is a bag-type dust collector. A filter bag arranged along the flowing direction of the flue gas is arranged in the bag-type dust collector, the flue gas after desulfurization passes through the filter bag, and solid particles in the flue gas are adsorbed on the filter bag to realize the cleaning of the flue gas; the incompletely reacted circulating ash is also intercepted by the filter bag, and the intercepted circulating ash is subjected to desulfurization reaction again under the flow of flue gas, so that the desulfurization effect of the ultra-stable semi-dry desulfurization tower is further improved, and the utilization rate of the circulating ash is improved.
In some embodiments, referring to fig. 1 and 4, an induced draft fan 41 is provided on the exhaust duct 4 between the return duct 6 and the precipitator 3. The induced draft fan 41 can lead out the high-temperature flue gas in the dust remover 3 to form flowing flue gas, and heat exchange between the flue gas and air is completed.
On the basis of the above embodiment, the conditioning duct 50 includes the first flow section 51, the accelerating duct 54, and the second flow section 53, which are arranged in this order in the flow direction of the flue gas. The adjusting pipe 50 in this embodiment is not provided with the control valve 521, and the flue gas directly enters the transition chamber 12 under the action of the accelerating pipe 54 after entering the adjusting pipe 50, so that the method is suitable for scenes with more flue gas flow.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (7)
1. A hyperstatic semi-dry desulfurization tower, characterized in that it comprises:
the tower body is provided with an air inlet chamber, a transition chamber, a reaction chamber and an air outlet chamber which are sequentially communicated from bottom to top;
an intake duct communicating with the intake chamber;
the dust remover is communicated with the air outlet of the air outlet chamber;
the exhaust pipeline is communicated with an exhaust port of the dust remover;
the adjusting assembly comprises a plurality of adjusting pipes distributed along the circumferential direction of the transition chamber, each adjusting pipe is provided with a control valve, the air inlet end of each adjusting pipe is connected to the air inlet chamber, and the air outlet end of each adjusting pipe is communicated with the transition chamber along the tangential direction of the transition chamber, or the air inlet end of each adjusting pipe is connected to the air inlet pipeline, and the air outlet end of each adjusting pipe is communicated with the transition chamber along the tangential direction of the transition chamber; and
and the two ends of the return pipe are respectively communicated with the exhaust pipeline and the air inlet pipeline.
2. The ultra-stable semi-dry desulfurization tower as recited in claim 1, wherein said reaction chamber is provided with a circulating ash port and a process water port, said process water port is provided with an atomizing spray gun, said circulating ash port is used for spraying circulating ash into said reaction chamber, and said process water port feeds atomized water into said reaction chamber through said atomizing spray gun.
3. The ultra-stable semi-dry desulfurization tower according to claim 2, wherein the spray head of the atomizing spray gun is directed toward the axis of the tower body and is inclined upward.
4. The ultra-stable semi-dry desulfurization tower of claim 3, wherein the atomizing spray gun is a two-fluid atomizing spray gun.
5. The ultra-stable semi-dry desulfurization tower according to any one of claims 1 to 4, wherein the inner diameter of the upper portion of the transition chamber is greater than the inner diameter of the middle portion of the transition chamber, and the inner diameter of the lower portion of the transition chamber is greater than the inner diameter of the middle portion of the transition chamber.
6. The ultra-stable semi-dry desulfurization tower according to claim 5, wherein the adjusting pipe comprises a first flow section, an adjusting section and a second flow section which are sequentially arranged along the flow direction of the flue gas, and the adjusting section is provided with the control valve;
and/or an accelerating pipe is arranged between the adjusting section and the second flow section, and the accelerating pipe is a Venturi pipe.
7. The ultra-stable semi-dry desulfurization tower according to any one of claims 1 to 4, wherein the adjusting pipe comprises a first flow section, an adjusting section and a second flow section which are sequentially arranged along the flow direction of flue gas, and the adjusting section is provided with the control valve;
and/or an accelerating pipe is arranged between the adjusting section and the second flow section, and the accelerating pipe is a Venturi pipe.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202222581399.XU CN218188915U (en) | 2022-09-28 | 2022-09-28 | Hyperstable semi-dry process desulfurizing tower |
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| CN202222581399.XU CN218188915U (en) | 2022-09-28 | 2022-09-28 | Hyperstable semi-dry process desulfurizing tower |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116116180A (en) * | 2023-02-09 | 2023-05-16 | 山东泰开环保科技有限公司 | Flue gas inlet control system and control method for desulfurizing tower |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116116180A (en) * | 2023-02-09 | 2023-05-16 | 山东泰开环保科技有限公司 | Flue gas inlet control system and control method for desulfurizing tower |
| CN116116180B (en) * | 2023-02-09 | 2024-02-20 | 山东泰开环保科技有限公司 | Flue gas inlet control system and control method for desulfurizing tower |
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