CN112107991A - Circumferential air inlet desulfurization reactor - Google Patents

Circumferential air inlet desulfurization reactor Download PDF

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Publication number
CN112107991A
CN112107991A CN202011010002.0A CN202011010002A CN112107991A CN 112107991 A CN112107991 A CN 112107991A CN 202011010002 A CN202011010002 A CN 202011010002A CN 112107991 A CN112107991 A CN 112107991A
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China
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flue
reactor body
annular
inlet
reactor
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CN202011010002.0A
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陈冬林
田森浩
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Changsha University of Science and Technology
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Changsha University of Science and Technology
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Priority to CN202011010002.0A priority Critical patent/CN112107991A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/80—Semi-solid phase processes, i.e. by using slurries
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/46—Removing components of defined structure
    • B01D53/48—Sulfur compounds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2251/00—Reactants
    • B01D2251/40—Alkaline earth metal or magnesium compounds
    • B01D2251/404—Alkaline earth metal or magnesium compounds of calcium
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2251/00—Reactants
    • B01D2251/60—Inorganic bases or salts
    • B01D2251/604—Hydroxides
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2258/00—Sources of waste gases
    • B01D2258/02—Other waste gases
    • B01D2258/0283—Flue gases

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Biomedical Technology (AREA)
  • Analytical Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Treating Waste Gases (AREA)

Abstract

The invention provides a circumferential air inlet desulfurization reactor which comprises a vertically arranged reactor body, and an annular flue, a flow equalizing device, a spraying layer and a demisting device which are sequentially arranged on the reactor body from bottom to top, wherein the reactor body is provided with a horizontal inlet flue, and the top end of the reactor body is provided with an outlet flue for guiding flue gas from the demisting device; the annular flue is horizontally arranged along the outer side wall of the reactor body and is communicated with the inlet flue, a plurality of exhaust ports are arranged on the inner annular surface close to the circle center of the annular flue at intervals, vent holes which correspond to the exhaust ports in position and are the same in size are arranged on the side wall of the reactor body, and the exhaust ports are equidistantly arranged and used for guiding flue gas into the reactor body from the annular flue, and each exhaust port is provided with a baffle plate with an adjustable rotation angle. The desulfurization reactor has the advantages of uniform flow field, low running resistance and high desulfurization efficiency.

Description

Circumferential air inlet desulfurization reactor
Technical Field
The invention relates to the technical field of desulfurization reactors, in particular to a circumferential air inlet desulfurization reactor.
Background
At present, wet desulphurization reactors by a calcium method applied to domestic and foreign coal-fired power plants adopt a single-side air inlet mode, and flue gas directly impacts the wall surface on the opposite side after entering the reactors and moves upwards along the wall surface after being blocked. Due to the adoption of the air inlet mode, the situation that the flue gas on one side is large and the flue gas flow on one side is small in the flue gas flow field of the cross section in the desulfurization reactor, even an area without flue gas flowing exists, and the flow field in the desulfurization reactor is extremely uneven. In this case, the flue gas and the lime slurry cannot be kept in effective large-area contact, and thus the chemical reaction between the two cannot be guaranteed to be complete, which directly reduces the desulfurization efficiency.
Based on the above situation, at present, manufacturers usually take the following measures:
(1) more efficient flow equalizing equipment is added or the porosity of the existing flow equalizing equipment is increased.
The method can effectively improve the flue gas flow field in the desulfurization reactor, thereby improving the desulfurization efficiency, but the flow equalizing effect of the flow equalizing equipment is usually in inverse proportion to the resistance, namely the flow equalizing effect is better, and the running resistance of the flow equalizing layer is larger. As the operation time increases, the resistance in the desulfurization reactor further increases due to occurrence of clogging or the like.
(2) The number of spraying layers is increased or the circulation amount of lime slurry is increased.
The method can increase the reaction time of the lime slurry and the flue gas, thereby improving the desulfurization efficiency. However, the addition of a spray layer seriously increases the running resistance in the reactor. In addition, the increase of the number of spraying layers or the increase of the circulating amount of lime slurry greatly increases the power consumption of the circulating pump, which is not favorable for the stability of the whole system of the desulfurization reactor in the past.
In summary, there is a need for a circumferential gas inlet desulfurization reactor to solve the problems of the prior art, such as uneven flow field, excessive running resistance and low desulfurization efficiency, in the desulfurization reactor.
Disclosure of Invention
The invention aims to provide a circumferential air inlet desulfurization reactor, which has the following specific technical scheme:
a circumferential air inlet desulfurization reactor comprises a vertically arranged reactor body, and an annular flue, a flow equalizing device, a spraying layer and a demisting device which are sequentially arranged on the reactor body from bottom to top, wherein a horizontal inlet flue is arranged on the reactor body, and an outlet flue is arranged at the top end of the reactor body and used for guiding flue gas from the demisting device;
the flow equalizing device, the spraying layer and the demisting device are all positioned in the reactor body;
the annular flue is horizontally arranged along the outer side wall of the reactor body and is communicated with the inlet flue, a plurality of exhaust ports are arranged on the inner annular surface of the annular flue close to the circle center of the annular flue at intervals, vent holes with the same size and corresponding to the positions of the exhaust ports are arranged on the side wall of the reactor body, the exhaust ports are arranged at equal intervals and are used for guiding flue gas into the reactor body from the annular flue, a baffle with an adjustable rotation angle is arranged on each exhaust port, and the opening size of each exhaust port is adjusted through rotating the baffle, so that the flue gas flow velocity of different exhaust ports is the same;
the flow equalizing device comprises a plurality of flow equalizing holes which are horizontally distributed and used for uniformly dispersing the passing flue gas, and the spraying layer is used for spraying lime slurry.
Preferably, the number of the exhaust ports is four, the bottom edge of each exhaust port is flush with the bottom of the annular flue, the opening lengths of the four exhaust ports are equal, the opening heights of the four exhaust ports are equal, and the opening heights are not larger than the height of the annular flue.
Preferably, the shutter is provided to be rotatable upward and downward.
Preferably, a drainage piece is further arranged between the inlet flue and the annular flue, the drainage piece is of a herringbone structure, the head of the drainage piece is arranged in the inlet flue and positioned in the middle of the inlet flue, and the opening end of the drainage piece is connected with the annular flue.
Preferably, every still vertically be equipped with the polylith guide plate on the gas vent, the polylith the guide plate interval sets up and the interval equals.
Preferably, the vertical plane where each guide plate is located is coplanar with the center of the circular flue.
Preferably, the inlet flue is arranged at the middle lower section of the reactor body.
The technical scheme of the invention has the following beneficial effects:
(1) according to the circumferential air inlet desulfurization reactor, the annular flue is horizontally arranged along the outer side wall of the reactor body 01 and is communicated with the inlet flue, the annular flue is provided with a plurality of air outlets at intervals on the inner annular surface close to the circle center of the annular flue, the air outlets are arranged at equal intervals, the circumferential air inlet structural design is realized, flue gas enters the annular flue from the inlet flue, the flow velocity of the flue gas of each air outlet is equal through the air outlets and the opening size of the air outlet is adjusted through the baffle plate, therefore, the flue gas exhausted from the air outlets firstly rushes to the circle center position of the annular flue and then radiates to the periphery, and the uniformity of the flue gas in the reactor body can be obviously improved. The problems that the existing single-side air inlet mode causes the situation that flue gas on one side is large and the flue gas flow on one side is small in the cross section flue gas flow field in the reactor body, even the area without flue gas flowing exists, and the flow field in the reactor body is extremely uneven are solved. The invention can still keep good desulfurization effect when the load of the boiler unit is lower, and has better adaptability.
(2) According to the circumferential air inlet desulfurization reactor disclosed by the invention, a flue gas flow field in the reactor body is greatly improved through the arrangement of the annular flue, the baffle and the exhaust port under the conditions that more efficient flow equalizing equipment is not additionally arranged or the porosity of the existing flow equalizing equipment is not increased and the number of spraying layers is not increased, the desulfurization efficiency is improved, and the running resistance is also reduced.
(3) According to the circumferential air inlet desulfurization reactor, the annular flue, the baffle and the exhaust port are arranged, so that a flue gas flow field in the reactor body is greatly improved, the flue gas can be fully contacted with lime slurry under the condition that the circulating amount of the lime slurry is not increased, the reaction area is increased, the chemical reaction is completely ensured, the desulfurization efficiency is improved, and the power consumption of a circulating pump is greatly reduced.
(4) According to the invention, a plurality of guide plates are vertically arranged on each exhaust port, the guide plates are arranged at intervals and have equal intervals, and the vertical plane where each guide plate is located is coplanar with the circle center of the annular flue, so that the flue gas is ensured to impact the circle center of the annular flue under the guide action of the guide plates, and the flue gas is convenient to radiate to the periphery. In addition, the arrangement of the guide plates provides a supporting effect for the annular flue, and the improvement of the overall strength of the desulfurization reactor is facilitated.
(5) The circumferential air inlet desulfurization reactor disclosed by the invention is low in modification cost. Compare in traditional desulfurization reactor and carry effect and fall and hinder the structure, if increase high-efficient equipment that flow equalizes or increase and spray the layer etc. all consume the capital for huge, and reform transform the cycle length, be unfavorable for the holistic economic nature of boiler unit.
(6) According to the invention, the arrangement of the flow guide piece enables the flue gas to be divided into two flue gas flows from the inlet flue through the flow guide piece, so that the flue gas can enter the annular flue quickly and efficiently.
(7) The inlet flue is arranged on the middle lower section of the reactor body, so that the residence time of the flue gas in the tower can be prolonged, the desulfurization efficiency is increased, the influence on the operation of a slurry pool arranged below the reactor body is effectively avoided, the sufficient installation space of the annular flue, the flow equalizing device, the spraying layer and the demisting device is ensured, and the uniform diffusion of the flue gas flowing into the reactor body is facilitated.
(8) The circumferential air inlet desulfurization reactor disclosed by the invention is simple in structure, strong in practicability and convenient to popularize and use.
In addition to the objects, features and advantages described above, other objects, features and advantages of the present invention are also provided. The present invention will be described in further detail below with reference to the drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic structural view of a circumferential feed gas desulfurization reactor according to example 1 of the present invention (the internal structure is shown);
FIG. 2 is an axial vertical cross-sectional view of FIG. 1;
FIG. 3 is a cross-sectional view A-A of FIG. 2
Wherein, 1, entry flue, 2, annular flue, 2.1, gas vent, 2.2, guide plate, 3, flow straightener, 4, spray the layer, 5, defogging device, 6, export flue, 7, drainage piece, 01, reactor body.
Detailed Description
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, which are defined and covered by the claims.
Example 1:
referring to fig. 1-3, a circumferential air intake desulfurization reactor comprises a reactor body 01 which is vertically arranged, and an annular flue 2, a flow equalizing device 3, a spraying layer 4 and a demisting device 5 which are sequentially arranged on the reactor body 01 from bottom to top, wherein a horizontal inlet flue 1 is arranged on the reactor body 01, and an outlet flue 6 is arranged at the top end of the reactor body 01 and used for guiding flue gas from the demisting device 5;
the flow equalizing device 3, the spraying layer 4 and the demisting device 5 are all positioned in the reactor body 01;
the annular flue 2 is horizontally arranged along the outer side wall of the reactor body 01 and is communicated with the inlet flue 1, four exhaust ports 2.1 are arranged on the annular flue 2 at intervals on an inner annular surface close to the circle center of the annular flue, vent holes with the same size and corresponding to the exhaust ports 2.1 are arranged on the side wall of the reactor body 01, the four exhaust ports 2.1 are arranged at equal intervals and are used for guiding flue gas into the reactor body 01 from the annular flue 2, a baffle (not shown in the figure) with an adjustable rotation angle is arranged on each exhaust port 2.1, the opening size of each exhaust port 2.1 is adjusted through rotating the baffle, and the flue gas flow velocity of different exhaust ports 2.1 is the same;
flow straightener 3 includes a plurality of horizontal distribution's flow equalizing hole for the flue gas homodisperse that makes to pass through, spray layer 4 and be used for spraying lime thick liquid, defogging device 5 is arranged in handling the fog droplet that contains in the flue gas after spraying layer 4.
The bottom edge of each exhaust port 2.1 is flush with the bottom of the annular flue 2, the opening lengths of the four exhaust ports 2.1 are equal, the opening heights of the four exhaust ports 2.1 are equal, and the opening heights are not more than the height of the annular flue 2.
The baffle is arranged to be rotatable up and down, one long side of the baffle is rotatably connected to the top or bottom edge of the exhaust port 2.1, and the other long side is a free side for moving away from or close to the bottom or top edge of the exhaust port 2.1.
Referring to fig. 1-3, a flow guide member 7 is further disposed between the inlet flue 1 and the annular flue 2, the flow guide member 7 is of a herringbone structure, a head of the flow guide member 7 is disposed in the inlet flue 1 and located in the middle of the inlet flue 1, and an open end of the flow guide member is connected with the annular flue 2. The setting of drainage piece 7 makes the flue gas divide equally into two streams flue gas flows through drainage piece 7 by entry flue 1, ensures that the flue gas can high efficiency get into in the annular flue 2.
Referring to fig. 1-3, a plurality of baffles 2.2 are vertically arranged on each exhaust port 2.1, and the baffles 2.2 are arranged at intervals and at equal intervals.
The vertical plane where each guide plate 2.2 is located is coplanar with the center of a circle of the annular flue 2, so that the flue gas is ensured to impact the center of the annular flue 2 under the guide effect of the guide plates 2.2, and the flue gas is convenient to radiate around. In addition, the setting of polylith guide plate 2.2 provides the supporting role to annular flue 2, is favorable to improving the holistic intensity of reactor body 01.
Referring to fig. 1 and 2, the inlet flue is arranged at the middle lower section of the reactor body 01, so that the annular flue 2, the flow equalizing device 3, the spraying layer 4 and the demisting device 5 are ensured to have enough installation space, and the flue gas flowing into the reactor body 01 can be uniformly diffused.
In embodiment 1, the circumferential air inlet desulfurization reactor, the annular flue 2 is horizontally arranged along the outer side wall of the reactor body 01, and is communicated with the inlet flue 1, the annular flue 2 is provided with four exhaust ports 2.1 at intervals on the inner annular surface close to the circle center of the annular flue 2, the four exhaust ports 2.1 are arranged at equal intervals, the circumferential air inlet structural design is realized, flue gas enters the annular flue 2 from the inlet flue 1, and the flue gas passes through the four exhaust ports 2.1 and then the opening size of the exhaust port 2.1 is adjusted through the baffle plate, so that the flue gas flow rate of each exhaust port 2.1 is equal, therefore, the flue gas discharged from the four exhaust ports 2.1 firstly rushes to the circle center position of the annular flue and then radiates all around, and the uniformity of the flue gas in the reactor body 01 can be obviously improved. The problems that the existing single-side air inlet mode causes the situation that flue gas on one side is large and the flow rate of the flue gas on one side is small in the cross section flue gas flow field in the reactor body 01, even the situation that the flow field in the reactor body 01 is extremely uneven in an area without flowing of the flue gas is solved. The invention can still keep good desulfurization effect when the load of the boiler unit is lower, and has better adaptability.
According to the circumferential air inlet desulfurization reactor disclosed by the invention, under the conditions that more efficient flow equalizing equipment is not additionally arranged or the porosity of the existing flow equalizing equipment is not increased and the number of layers of 4 spraying layers is not increased, the flue gas flow field in the reactor body 01 is greatly improved through the arrangement of the annular flue 2, the baffle and the exhaust port 2.1, the desulfurization efficiency is improved, and the running resistance is also reduced.
According to the circumferential air inlet desulfurization reactor, the annular flue 2, the baffle and the exhaust port 2.1 are arranged, so that a flue gas flow field in the reactor body 01 is greatly improved, the flue gas can be fully contacted with lime slurry under the condition that the circulating amount of the lime slurry is not increased, the reaction area is increased, the chemical reaction is completely ensured, the desulfurization efficiency is improved, and the power consumption of a circulating pump is greatly reduced.
The circumferential air inlet desulfurization reactor disclosed by the invention is low in modification cost. Compare in traditional desulfurization reactor and carry effect and fall and hinder the structure, if increase high-efficient equipment that flow equalizes or increase and spray layer 4 etc. all consume the capital for huge, and reform transform the cycle length, be unfavorable for the holistic economic nature of boiler unit.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (7)

1. A circumferential air inlet desulfurization reactor is characterized by comprising a vertically arranged reactor body, and an annular flue, a flow equalizing device, a spraying layer and a demisting device which are sequentially arranged on the reactor body from bottom to top, wherein the reactor body is provided with a horizontal inlet flue, and the top end of the reactor body is provided with an outlet flue for guiding flue gas from the demisting device;
the flow equalizing device, the spraying layer and the demisting device are all positioned in the reactor body;
the annular flue is horizontally arranged along the outer side wall of the reactor body and is communicated with the inlet flue, a plurality of exhaust ports are arranged on the inner annular surface of the annular flue close to the circle center of the annular flue at intervals, vent holes with the same size and corresponding to the positions of the exhaust ports are arranged on the side wall of the reactor body, the exhaust ports are arranged at equal intervals and are used for guiding flue gas into the reactor body from the annular flue, a baffle with an adjustable rotation angle is arranged on each exhaust port, and the opening size of each exhaust port is adjusted through rotating the baffle, so that the flue gas flow velocity of different exhaust ports is the same;
the flow equalizing device comprises a plurality of flow equalizing holes which are horizontally distributed and used for uniformly dispersing the passing flue gas, and the spraying layer is used for spraying lime slurry.
2. The circumferential inlet desulfurization reactor according to claim 1, wherein the number of the exhaust ports is four, the bottom edge of each exhaust port is flush with the bottom of the annular flue, the opening lengths of the four exhaust ports are equal, the opening heights of the four exhaust ports are equal, and the opening heights are not greater than the height of the annular flue.
3. The circumferential inlet desulfurization reactor of claim 2, wherein the baffle is configured to rotate upward and downward.
4. The circumferential air inlet desulfurization reactor according to claim 3, wherein a flow guide member is further disposed between the inlet flue and the annular flue, the flow guide member is of a herringbone structure, a head of the flow guide member is disposed in the inlet flue and located in the middle of the inlet flue, and an open end of the flow guide member is connected with the annular flue.
5. A circumferential air inlet desulfurization reactor as set forth in any of claims 1-4, characterized in that a plurality of baffles are vertically arranged on each of said exhaust ports, and said baffles are arranged at equal intervals.
6. A circumferential air inlet desulfurization reactor as recited in claim 5, wherein each of the baffles is disposed on a vertical plane coplanar with a center of the annular flue.
7. The circumferential inlet desulfurization reactor of claim 6, wherein the inlet flue is disposed at a mid-lower position of the reactor body.
CN202011010002.0A 2020-09-23 2020-09-23 Circumferential air inlet desulfurization reactor Pending CN112107991A (en)

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Application Number Priority Date Filing Date Title
CN202011010002.0A CN112107991A (en) 2020-09-23 2020-09-23 Circumferential air inlet desulfurization reactor

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN206587587U (en) * 2016-10-21 2017-10-27 东莞市大能环保科技有限公司 A kind of Novel desulfurization tower flue structure
CN207025030U (en) * 2017-07-12 2018-02-23 北京兴晟科技有限公司 A kind of spray column
CN208032246U (en) * 2018-01-31 2018-11-02 青岛万图明生物制品有限公司 A kind of integrated absorption tower

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN206587587U (en) * 2016-10-21 2017-10-27 东莞市大能环保科技有限公司 A kind of Novel desulfurization tower flue structure
CN207025030U (en) * 2017-07-12 2018-02-23 北京兴晟科技有限公司 A kind of spray column
CN208032246U (en) * 2018-01-31 2018-11-02 青岛万图明生物制品有限公司 A kind of integrated absorption tower

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
田立江等: "《大气污染控制工程实践教程》", 30 September 2019, 徐州：中国矿业大学出版社 *

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