CN209952585U - Be applied to flue gas desulfurization's of thermal power plant device - Google Patents
Be applied to flue gas desulfurization's of thermal power plant device Download PDFInfo
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- CN209952585U CN209952585U CN201920741220.8U CN201920741220U CN209952585U CN 209952585 U CN209952585 U CN 209952585U CN 201920741220 U CN201920741220 U CN 201920741220U CN 209952585 U CN209952585 U CN 209952585U
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- thermal power
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Abstract
The utility model discloses a be applied to flue gas desulfurization's of thermal power plant device, including chimney, heat exchanger can regenerate, inhale formula pulse jet desulfurizer, knockout tower, thick liquid governing system and draught fan certainly, the chimney communicates in heat exchanger can regenerate, and heat exchanger can regenerate passes through inhale formula pulse jet desulfurizer and connect in the knockout tower certainly, and the knockout tower passes through thick liquid governing system and communicates in inhaling formula pulse jet desulfurizer, and the knockout tower passes through the draught fan and communicates in heat exchanger can regenerate. The utility model discloses beneficial effect: complex equipment such as flue gas extraction, slurry mixing and the like in a typical desulfurization process is realized by one set of equipment, so that the desulfurization process is simpler and is easy to popularize; the most important mixing means in the desulfurization process is innovative, the traditional mixing means such as spraying and atomizing is changed into entrainment type mixing, the slurry is directly thrown out in a block form by an impeller at a high speed to form vacuum entrainment flue gas, high ordering of mixing is realized, and the mixing efficiency is improved.
Description
Technical Field
The utility model belongs to the technical field of the energy-conserving technique of thermal power plant and specifically relates to a be applied to flue gas desulfurization's of thermal power plant device.
Background
Flue gas desulfurization technology is currently recognized as the most effective technology for controlling sulfur dioxide pollution. The typical gypsum-process flue gas desulfurization technology is to realize flue gas desulfurization emission by using slurry containing limestone to wash flue gas and neutralizing sulfur dioxide in the flue gas. The flue gas desulfurization effect is directly influenced by the mixing degree and effect of the flue gas and the slurry, and in order to fully mix the flue gas and the slurry, the existing method adopts an absorption tower to carry out countercurrent mixing. A typical mixing procedure is: limestone slurry is sprayed downwards from the upper part of the tower and is mixed with flue gas flowing upwards in a countercurrent manner, sulfur dioxide in the flue gas reacts with absorbent slurry to generate calcium sulfite, and the calcium sulfite is oxidized into calcium sulfate, namely gypsum, by oxygen in the air, so that the desulfurization process of the flue gas is realized; and discharging the desulfurized clean flue gas into the atmosphere.
The method for flue gas desulfurization by using limestone slurry is the most extensive and technically mature flue gas desulfurization control technology, but the key of desulfurization efficiency lies in the mixing strength of slurry and flue gas, the core of the technical development is the effort on how to fully mix flue gas and slurry, and although the typical enhanced mixing methods such as spraying, stirring, spraying and other technologies can achieve the flue gas desulfurization efficiency of more than 95% at the highest, the method is additionally introduced with high energy consumption and a complex process structure. At present, the technology with simple process and good desulfurization effect is still the core of the development of flue gas desulfurization.
Therefore, there is a need for a device and a method for flue gas desulfurization in a thermal power plant, which are simple in structure, reliable in operation and high in desulfurization efficiency, and by means of which the opening member is closed and tightened.
SUMMERY OF THE UTILITY MODEL
To the not enough of existence among the above-mentioned prior art, the utility model aims to provide a be applied to thermal power plant's flue gas desulfurization device utilizes the mixed desulfurizer of pulse to realize thick liquid supply, flue gas suction, flue gas desulfurization, delivery pump as an organic whole, realizes desulfurization process's utmost point simplification.
The utility model provides a be applied to flue gas desulfurization's of thermal power plant device, includes chimney, renewable heat exchanger, inhales formula pulse jet desulfurizer, knockout tower, thick liquid governing system and draught fan certainly, the chimney communicate in renewable heat exchanger, renewable heat exchanger passes through inhale formula pulse jet desulfurizer connect in the knockout tower certainly, the knockout tower pass through thick liquid governing system communicate in inhale formula pulse jet desulfurizer certainly, the knockout tower passes through the draught fan communicate in renewable heat exchanger.
Preferably, the self-suction type pulse jet desulfurizer comprises an array nozzle impeller, a mixing section and a diffusion section, wherein the array nozzle impeller is connected to the diffusion section through the mixing section.
Preferably, a water inlet is arranged at the central position of the array nozzle impeller, and an air inlet is arranged at the upper part of the mixing section.
Preferably, the bottom of the separation tower is provided with a gypsum outlet for separating calcium carbonate and hydrate thereof generated by the reaction with sulfur dioxide.
Preferably, the gauge pressure of an air inlet of the self-suction pulse jet desulfurizer is-20 kPa to-5.0 kPa.
Preferably, the slurry conditioning system is used to condition the slurry concentration at the outlet of the separation column to 30% slurry.
Preferably, the self-suction pulse jet desulfurizer is internally provided with a material or a coating which is resistant to limestone corrosion.
Preferably, the material or the coating adopts Cr30, A49 or ceramic.
A method applied to flue gas desulfurization of a thermal power plant comprises the following steps:
s1, the array nozzle impeller 32 of the self-suction pulse jet desulfurizer 3 rotates at a high speed, limestone slurry in the slurry adjusting system 5 is extracted, and one part of the slurry is thrown out at the impeller outlet in a block form at a high speed through the gap of the array nozzle impeller 32 to form vacuum of-20 kPa to-5.0 kPa;
s2, pumping the raw flue gas generated by the chimney 1 into the self-suction type pulse jet desulfurizer 3 through the air inlet 33 of the self-suction type pulse jet desulfurizer 3; wherein the temperature of the raw flue gas is reduced to 40-60 ℃ after passing through the renewable heat exchanger 2;
s3, in the core area of the desulfurization process in the mixing section 34 of the self-suction pulse jet desulfurizer 3, sulfur dioxide in the original flue gas and limestone slurry are fully mixed and reacted in the mixing section 34 to generate calcium carbonate or calcium carbonate hydrate;
s4, after passing through the diffusion section 35, the desulfurized flue gas and the slurry convert kinetic energy into pressure energy, the pressure is increased to positive pressure and then flows into the separation tower 4, the separation tower 4 has the function of realizing gas-liquid-solid three-phase separation, and the desulfurized new flue gas is sent into the renewable heat exchanger 2 through the top outlet and the induced draft fan 5 to take away the heat of the original flue gas;
s5, discharging the calcium carbonate or calcium carbonate hydrate generated by desulfurization through a bottom outlet of the separation tower 4; and the rest slurry flows into the flow graph slurry adjusting system 5, is subjected to concentration adjustment and then participates in the subsequent technological process through the water inlet 31 under the action of the self-suction pulse jet desulfurizer 3, and a cycle is completed.
Compared with the prior art, the utility model has the advantages of:
(1) complex equipment such as flue gas extraction, slurry mixing and the like in a typical desulfurization process is realized by one set of equipment, so that the desulfurization process is simpler and is easy to popularize;
(2) the most important mixing means in the desulfurization process is innovative, the traditional mixing means such as spraying and atomizing is changed into entrainment type mixing, the slurry is directly thrown out in a block form by an impeller at a high speed to form vacuum entrainment flue gas, high ordering of mixing is realized, and the mixing efficiency is improved.
Drawings
Fig. 1 is a structural diagram of a device applied to flue gas desulfurization of a thermal power plant.
Reference numbers in the figures: 1. a chimney; 2. a regenerable heat exchanger; 3. a self-suction pulse jet desulfurizer; 31. a water inlet; 32. an array nozzle impeller; 33. an air inlet; 34. a mixing section; 35. a diffusion section; 4. a separation column; 5. a slurry conditioning system; 6. an induced draft fan.
Detailed Description
It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. 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," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
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 embodiments of the invention will be described in detail below with reference to the drawings, but the invention can be implemented in many different ways as defined and covered by the claims.
As shown in fig. 1, a be applied to flue gas desulfurization's of thermal power plant device, include chimney 1, renewable heat exchanger 2, from inhaling formula pulse jet desulfurizer 3, knockout tower 4, thick liquid governing system 5 and draught fan 6, chimney 1 communicate in renewable heat exchanger 2, renewable heat exchanger 2 passes through from inhaling formula pulse jet desulfurizer 3 connect in knockout tower 4, knockout tower 4 through thick liquid governing system 5 communicate in from inhaling formula pulse jet desulfurizer 3, knockout tower 1 passes through draught fan 6 communicate in renewable heat exchanger 2.
Wherein, the separation tower 4 is provided with three outlets, the outlet at the top is a new flue gas outlet, and an induced draft fan 6 is arranged on an outlet pipeline; the outlet at the bottom of the separation tower 4 is a gypsum outlet and is used for separating calcium carbonate and hydrate thereof generated by reaction with sulfur dioxide; the outlet at the side part of the separation tower 4 is connected with the water inlet 31 of the self-suction pulse jet desulfurizer 3; the new flue gas from the outlet of the induced draft fan 6 is introduced into the renewable heat exchanger 2 to exchange heat with the original flue gas, so that the consumption of cooling water can be reduced.
The array nozzle impeller 32 in the self-priming pulse jet desulfurizer 3 ensures that the sprayed seawater is discontinuous and has great pulse characteristics, the pulse frequency is related to the arrangement and the rotating speed of the array nozzle impeller 32, and after the design and the determination of the array nozzle impeller 32, the pulse frequency can be adjusted by adjusting the rotating speed to obtain the optimal working performance.
Further, the self-priming pulse jet desulfurizer 3 comprises an array nozzle impeller 32, a mixing section 34 and a diffusion section 35, wherein the array nozzle impeller 32 is connected to the diffusion section 35 through the mixing section 34.
Further, a water inlet 31 is arranged at the center of the array nozzle impeller 32, and an air inlet 33 is arranged at the upper part of the mixing section 34.
Further, the bottom of the separation tower 4 is provided with a gypsum outlet for separating calcium carbonate and hydrate thereof generated by reaction with sulfur dioxide.
Further, the gauge pressure of an air inlet of the self-suction pulse jet flow desulfurizer 3 is-20 kPa to-5.0 kPa.
Further, the slurry adjusting system 5 is used for adjusting the slurry concentration at the outlet of the separation tower 4 to 30% slurry.
Further, a limestone corrosion resistant material or coating is arranged inside the self-suction type pulse jet desulfurizer 3.
Further, the material or the coating adopts Cr30, A49 or ceramic.
The utility model is characterized in that the pulse mixing technology is applied to the field of flue gas desulfurization, the high-efficiency desulfurization of flue gas is realized, limestone slurry enters a mixer under the action of a self-suction pulse jet desulfurizer, the slurry is thrown out at high speed in a block shape through a nozzle gap to form a larger vacuum to realize the suction of the flue gas, the thrown fluid is in a discontinuous block shape, the sucked flue gas is sucked by numerous block-shaped slurry, the full mixing reaction of the flue gas and the slurry is realized like the spray mixing, the advantage which is difficult to obtain by other mixing methods is provided for the full mixing between the flue gas and the slurry, the high-efficiency desulfurization of the flue gas is realized, the outlet of the self-suction pulse jet desulfurizer 3 is designed in a zoom tube shape, the mixed slurry and the flue gas convert kinetic energy into pressure energy in a diffusion section 35, the function of a 'transport pump' is realized, mixed fluid is pumped into the separation tower 4, and gas-liquid-solid three-phase separation of new flue gas, slurry and gypsum is realized.
The working process of the flue gas desulfurization method of the thermal power plant comprises the following steps:
s1, the array nozzle impeller 32 of the self-suction pulse jet desulfurizer 3 rotates at a high speed, limestone slurry in the slurry adjusting system 5 is extracted, and one part of the slurry is thrown out at the impeller outlet in a block shape at a high speed through the gap of the array nozzle impeller 32 to form vacuum of about-20 kPa;
s2, pumping the raw flue gas generated by the chimney 1 into the self-suction type pulse jet desulfurizer 3 through the air inlet 33 of the self-suction type pulse jet desulfurizer 3; wherein the temperature of the raw flue gas is reduced to 40-60 ℃ after passing through the renewable heat exchanger 2;
s3, in the core area of the desulfurization process in the mixing section 34 of the self-suction pulse jet desulfurizer 3, sulfur dioxide in the original flue gas and limestone slurry are fully mixed and reacted in the mixing section 34 to generate calcium carbonate or calcium carbonate hydrate;
s4, after passing through the diffusion section 35, the desulfurized flue gas and the slurry convert kinetic energy into pressure energy, the pressure is increased to positive pressure and then flows into the separation tower 4, the separation tower 4 has the function of realizing gas-liquid-solid three-phase separation, and the desulfurized new flue gas is sent into the renewable heat exchanger 2 through the top outlet and the induced draft fan 5 to take away the heat of the original flue gas;
s5, discharging the calcium carbonate or calcium carbonate hydrate generated by desulfurization through a bottom outlet of the separation tower 4; and the rest slurry flows into the flow graph slurry adjusting system 5, is subjected to concentration adjustment and then participates in the subsequent technological process through the water inlet 31 under the action of the self-suction pulse jet desulfurizer 3, and a cycle is completed.
Compared with the prior art, the utility model has the advantages of:
(1) complex equipment such as flue gas extraction, slurry mixing and the like in a typical desulfurization process is realized by one set of equipment, so that the desulfurization process is simpler and is easy to popularize;
(2) the most important mixing means in the desulfurization process is innovative, the traditional mixing means such as spraying and atomizing is changed into entrainment type mixing, the slurry is directly thrown out in a block form by an impeller at a high speed to form vacuum entrainment flue gas, high ordering of mixing is realized, and the mixing efficiency is improved.
The above only is the preferred embodiment of the present invention, not limiting the scope of the present invention, all the equivalent structures or equivalent flow changes made by the contents of the specification and the drawings, or directly or indirectly applied to other related technical fields, are included in the same way in the protection scope of the present invention.
Claims (8)
1. The utility model provides a be applied to flue gas desulfurization's of thermal power plant device which characterized in that: including chimney (1), renewable heat exchanger (2), inhale formula pulse jet desulfurizer (3), knockout tower (4), thick liquid governing system (5) and draught fan (6) certainly, chimney (1) communicate in renewable heat exchanger (2), renewable heat exchanger (2) pass through inhale formula pulse jet desulfurizer (3) connect in knockout tower (4), knockout tower (4) through thick liquid governing system (5) communicate in inhale formula pulse jet desulfurizer (3) certainly, knockout tower (4) pass through draught fan (6) communicate in renewable heat exchanger (2).
2. The apparatus for flue gas desulfurization in thermal power plants according to claim 1, wherein: self-priming pulse jet desulfurizer (3) includes array nozzle impeller (32), mixing section (34) and diffusion section (35), array nozzle impeller (32) through mixing section (34) connect in diffusion section (35).
3. The apparatus for flue gas desulfurization in thermal power plants according to claim 2, wherein: the central position of array nozzle impeller (32) is provided with water inlet (31), the upper portion of mixing section (34) is provided with air inlet (33).
4. The apparatus for flue gas desulfurization in thermal power plants according to claim 1, wherein: and a gypsum outlet is formed in the bottom of the separation tower (4) and is used for separating calcium carbonate and hydrate thereof generated by reaction with sulfur dioxide.
5. The apparatus for flue gas desulfurization in thermal power plants according to claim 1, wherein: the gauge pressure of an air inlet of the self-suction pulse jet desulfurizer (3) is-20 kPa to-5.0 kPa.
6. The apparatus for flue gas desulfurization in thermal power plants according to claim 1, wherein: the slurry adjusting system (5) is used for adjusting the slurry concentration at the outlet of the separation tower (4) to 30% of slurry.
7. The apparatus for flue gas desulfurization in thermal power plants according to claim 1, wherein: and a limestone corrosion resistant material or coating is arranged in the self-suction pulse jet desulfurizer (3).
8. The apparatus for flue gas desulfurization in thermal power plants according to claim 1, wherein: wherein the material or the coating adopts Cr30, A49 or ceramic.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920741220.8U CN209952585U (en) | 2019-05-22 | 2019-05-22 | Be applied to flue gas desulfurization's of thermal power plant device |
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| CN201920741220.8U CN209952585U (en) | 2019-05-22 | 2019-05-22 | Be applied to flue gas desulfurization's of thermal power plant device |
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