CN216093044U - External flue gas water conservancy diversion preprocessing device - Google Patents
External flue gas water conservancy diversion preprocessing device Download PDFInfo
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- CN216093044U CN216093044U CN202120917611.8U CN202120917611U CN216093044U CN 216093044 U CN216093044 U CN 216093044U CN 202120917611 U CN202120917611 U CN 202120917611U CN 216093044 U CN216093044 U CN 216093044U
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Abstract
The utility model provides an external flue gas diversion pretreatment device, and relates to the technical field of chemical equipment. The utility model comprises the following steps: the smoke inlet is connected with a flue, and the smoke transmission direction of the flue is vertical to the central axis of the cylinder and does not pass through the central axis of the cylinder; the flow guide structure is arranged in the fluid cavity from the smoke inlet to the smoke outlet; the flow guide plate comprises a column core and flow guide plates, wherein the flow guide plates are distributed on the column core in a surrounding manner; one end of the flow deflector is fixedly connected with the inner wall of the cylinder body, and the other end of the flow deflector is fixedly connected with the column core; the projections of the plurality of flow deflectors on the bottom of the cylinder along the central axis of the cylinder are not overlapped or partially overlapped; the pre-spraying device is arranged on the flue and/or the cylinder. The utility model can effectively avoid the damage to the internal structure of the desulfurizing tower due to the unstable flue gas, and can also reduce the load and the operation cost of the desulfurizing tower.
Description
Technical Field
The utility model relates to the technical field of chemical equipment, in particular to an external flue gas diversion pretreatment device.
Background
With the updating and iteration of the production technology, in order to improve the competitiveness of enterprises, industrial production equipment and waste gas treatment equipment also need to be upgraded and modified. However, for small and medium-sized enterprises, the cost for replacing large-sized equipment is extremely high, and the equipment is modified to better meet the economic development requirement.
In order to adapt to the working condition of large flow rate of flue gas of a furnace kiln, a flue gas diversion structure is usually arranged in the existing desulfurizing tower, and flue gas can be improved in flue gas diversion property through the flue gas diversion structure after entering the desulfurizing tower, so that the pressure field in the tower is optimized, and the excessive impact on the internal structure of the desulfurizing tower is prevented. For the prior equipment mainly treating the boiler flue gas, the kiln flue gas is required to be treated in a rotating mode, and the structure is difficult to be added in the desulfurizing tower under the condition that the equipment is not updated. Because the initial desulfurizing tower is designed according to the preset flue gas working condition (boiler flue gas), no design space is left for the flue gas diversion structure, once the flue gas working condition is greatly changed, the flue gas treatment of a new working condition can not be realized by the original structure, the factors of changing a civil engineering foundation and the like need to be considered by adding the flue gas diversion structure in the original equipment, the original tower body needs to be cut, installed and sealed, the related workload and the working difficulty are extremely high, and the actual operation can not be realized basically. In addition, because the sulfur content of the flue gas of the furnace is high, the desulfurization load of the desulfurization tower is large, and the operation cost of the desulfurization tower is high.
SUMMERY OF THE UTILITY MODEL
Based on this, it is necessary to provide an external flue gas water conservancy diversion preprocessing device to above-mentioned problem, the device sets up at the desulfurizing tower front end, can let in the flue gas of a plurality of kilns simultaneously, guarantee that the flue gas gets into the back and fully collide and stably circle round upward flow with the water conservancy diversion piece, the dwell time of extension flue gas in equipment, carry out the preliminary treatment to the flue gas through spray set in advance, reduce equipment transformation cost on the one hand, avoid damaging desulfurizing tower inner structure because of the flue gas is unstable, on the other hand reduces the load and the running cost of desulfurizing tower.
An external flue gas diversion preprocessing device includes:
the smoke inlet is connected with a flue for introducing smoke, and the smoke transmission direction of the flue is vertical to the central axis of the cylinder and does not pass through the central axis of the cylinder;
a flow directing structure disposed within the fluid cavity from the smoke inlet to the smoke outlet; the flow guide structure comprises a column core and a plurality of flow guide sheets, the central axis of the column core is superposed with the central axis of the cylinder body, and the flow guide sheets are distributed on the column core in a surrounding manner; one end of the flow deflector is fixedly connected with the inner wall of the cylinder body, and the other end of the flow deflector is fixedly connected with the column core; the projections of the plurality of flow deflectors on the horizontal plane along the central axis of the cylinder body are not overlapped or partially overlapped;
the pre-spraying device is arranged on the flue and/or the cylinder and is used for spraying water and/or an absorbent to the flue gas, and cooling and/or pre-desulfurizing the flue gas.
The external flue gas diversion pretreatment device is arranged at the front end of the desulfurization tower in a matching manner, flue gas of a plurality of kilns can be introduced at the same time, and the flue gas fully collides with the diversion piece after entering, so that turbulent flue gas is converted into stable and circularly-raised flue gas, the damage to the internal structure after the flue gas enters the desulfurization tower is avoided, and the desulfurization effect is ensured; the device has simple structure, does not need to change the internal structure of the desulfurizing tower, has more feasibility and economic benefit compared with a structure for cutting and additionally installing a flow guide on the desulfurizing tower, and is beneficial to reducing the equipment modification cost; meanwhile, the flue gas whirls up to prolong the retention time of the flue gas, and the flue gas is pretreated by the pre-spraying device, so that the desulfurization load and the operation cost of the desulfurization tower are reduced.
In one embodiment, the number of the smoke inlets is 3, and the included angle of the smoke transmission directions of the flues connected with the adjacent smoke inlets is 120 degrees. The flue gas passes through a plurality of smoke inlets entering device, guarantees that each smoke inlet air input is balanced, and flue gas transmission direction contained angle equals, is favorable to the flue gas to steadily circle round to rise, improve equipment's stability.
In one embodiment, the number of the smoke inlets is 4, and the included angle of the smoke transmission directions of the flues connected with the adjacent smoke inlets is 90 degrees.
In one embodiment, the bottom of the cylinder is provided with a liquid outlet for discharging liquid. A large amount of water vapor is possibly carried in the flue gas, condensed water is generated when the flue gas collides with the guide plate, and the condensed water can be timely discharged through the liquid outlet.
In one embodiment, the proportionality coefficient of the diameter of the cylinder and the total flue gas flow introduced into the cylinder is 1 m: (8.3-11.5 ten thousand) m3H, the height of the cylinder is (d)Smoke inlet+dCigarette outlet+4m)～(dSmoke inlet+dCigarette outlet+6.5 m). The cylinder body with the size occupies small area, and can treat the flue gas with large air quantity.
In one embodiment, the pre-spraying device comprises a first pre-spraying device and a second pre-spraying device; the first pre-spraying device is arranged on the flue at a distance of 1.0-2.0 m from the smoke inlet, and a nozzle of the first pre-spraying device faces to a direction vertical to the transmission direction of fluid in the flue; the second pre-spraying device is arranged on the cylinder body, and a nozzle of the second pre-spraying device faces to the direction vertical to and/or parallel to the central axis of the cylinder body.
The first pre-spraying device and the second pre-spraying device can be communicated with a water supply part or a lime slurry supply part. When the water supply part is communicated, water is sprayed on the flue gas to cool the flue gas, so that the equipment is prevented from being damaged due to overhigh temperature. When the lime slurry supply part is communicated, the flue gas is pre-desulfurized and cooled by utilizing a strong turbulent flow field caused by diversion, so that the load and the operation cost of the wet desulphurization tower are reduced.
In one embodiment, the ratio coefficient of the diameter of the smoke inlet to the total smoke flow introduced into the cylinder is 1 m: (23.8-25.8 ten thousand) m3The ratio coefficient of the diameter of the smoke outlet to the total smoke flow introduced into the cylinder body is 1 m: (18.5 to 20 ten thousand) m3/h。
In one embodiment, the guide vane is an arc guide vane, and the concave surface of the guide vane is inclined upwards. The flue gas collides with the convex surface of the flow deflector after entering, and then moves upwards along the arc extending direction, so that the resistance can be reduced due to the arc shape, and the flow deflector is prevented from being damaged by the flue gas with overlarge impact.
In one embodiment, the number of the flow deflectors is 6-10, and the windward area of a single flow deflector is 0.48 pi r2sin7.5°～0.495πr2sin15 deg., where r is the radius of the cylinder. The kiln has large smoke volume and flow velocity, and the guide vanes with more quantity and larger windward side need to be arranged.
In one embodiment, the guide vanes are spirally and step-like arranged on the column core by taking a central shaft of the column core as an axis, and a symmetry axis of each guide vane is perpendicular to the central shaft of the column core.
Compared with the prior art, the utility model has the following beneficial effects:
the external flue gas diversion pretreatment device is arranged at the front end of the desulfurization tower in a matching manner, flue gas of a plurality of kilns can be introduced simultaneously, and the flue gas fully collides with the diversion piece after entering the desulfurization tower, so that turbulent flue gas is converted into stable and circularly-rising flue gas, the damage to the internal structure after the flue gas enters the desulfurization tower is avoided, and the desulfurization effect is ensured; the device has simple structure, does not need to change the internal structure of the desulfurizing tower, has more feasibility and economic benefit compared with a structure for cutting and additionally installing a flow guide on the desulfurizing tower, and is beneficial to reducing the equipment modification cost; meanwhile, the flue gas whirls up to prolong the retention time of the flue gas, and the flue gas is pretreated by the pre-spraying device, so that the desulfurization load and the operation cost of the desulfurization tower are reduced.
Drawings
Fig. 1 is a schematic structural diagram of an external flue gas diversion pretreatment device in the embodiment.
FIG. 2 is a schematic top view of the external flue gas diversion pretreatment device in the embodiment.
In the figure, 100, a cylinder; 110. a smoke outlet; 120. a smoke inlet; 121. a flue; 130. a liquid discharge port; 200. a flow guide structure; 210. a column core; 220. a flow deflector; 300. a first pre-spray device; 400. and the second pre-spraying device.
Detailed Description
To facilitate an understanding of the utility model, the utility model will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "coupled" to another element, it can be directly coupled to the other element or intervening elements may also be present.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the utility model herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Example 1
An external flue gas diversion pretreatment device is shown in fig. 1-2 and comprises a cylinder body 100, a diversion structure 200 and a pre-spraying device. The cylinder 100 is cylindrical, the top and the bottom of the cylinder are closed, the lower end of the side wall of the cylinder 100 is provided with three smoke inlets 120 for introducing smoke, the three smoke inlets 120 are uniformly arranged around the cylinder 100 at intervals, and the upper end of the side wall is provided with a smoke outlet 110 for discharging smoke. The three smoke inlets 120 are respectively connected with a flue 121 for introducing smoke, and the flue 121 is connected with the kiln. The flow guiding structure 200 is disposed in the fluid cavity from the smoke inlet 120 to the smoke outlet 110, the flow guiding structure 200 includes a pillar core 210 and 9 flow guiding plates 220, the central axis of the pillar core 210 coincides with the central axis of the barrel 100, the flow guiding plates 220 are fixed on the pillar core 210 in a spiral step shape with the central axis of the pillar core 210 as the axis, and the projection of the flow guiding plates 220 on the bottom of the barrel 100 along the central axis of the barrel 100 has no overlap or partial overlap. The use of the stem 210 provides greater stability to the device than the use of a spacer. One end of the baffle 220 is welded to the inner wall of the cylinder 100, and the other end is welded to the column core 210, so that the column core 210 is suspended and fixed in the cylinder 100 through the connection of the baffle 220. The smoke transmission direction of the flue 121 is perpendicular to the central axis of the column core 210/cylinder 100, but not through the central axis of the column core 210, so as to ensure that the smoke circularly rises around the column core 210 after entering. The flue gas in the kiln enters the device through the flue 121, strikes the flow deflector 220 in the process of circling and rising, and is optimized into the flue gas with stable flow velocity and flow direction through the action of the flow deflector 220. The pre-spraying device comprises a first pre-spraying device 300 and a second pre-spraying device 400; the first pre-spraying device 300 is arranged on the flue 121 close to the smoke inlet 120, and a nozzle of the first pre-spraying device 300 is arranged towards the direction vertical to the smoke transmission direction in the flue 121; the second pre-spraying device 400 is arranged on the cylinder 100, and the nozzle of the second pre-spraying device 400 is arranged towards the direction vertical to and/or parallel to the central axis of the cylinder 100. The first pre-spraying device 300 can spray cooling water to the flue gas to cool the flue gas, so that the equipment is prevented from being damaged due to overhigh temperature of the flue gas. As the flue gas is in a whirling rising state in the cylinder body 100, the retention time of the flue gas is increased, the second pre-spraying device 400 sprays lime slurry to the flue gas to absorb sulfur dioxide in the flue gas, further reduce the temperature of the flue gas and reduce the desulfurization load and the operation cost of a subsequent desulfurization tower.
In this embodiment, the diameter of the cylinder 100 is set to 6m, the height of the cylinder 100 is 9.5m, and the size of the cylinder 100 is small in floor area and can handle large amount of flue gas. The diameter of the smoke inlet 120 is 1.8m, and the diameter of the smoke outlet 110 is 3.2 m.
A liquid outlet 130 is arranged at the bottom of the cylinder 100, and the liquid outlet 130 can be used for discharging condensed water, cooling water or lime slurry after absorbing sulfur dioxide.
The guide vane 220 is an arc-shaped guide vane 220, the central angle corresponding to the arc is 90 degrees, the diameter corresponding to the arc is about 2.50m, the tangent lines of the two end points of the arc are respectively positioned in the vertical direction and the horizontal direction, and the concave surface of the guide vane 220 is inclined upwards. The flue gas collides with the convex surface of the guide vane 220 after entering, and then moves along the arc extending direction, so that the resistance can be reduced due to the arc shape, and the guide vane 220 is prevented from being damaged by the flue gas with overlarge impact force. The windward area of the single flow deflector 220 is 2.82m2The guide vanes 220 with larger windward sides are more suitable for treating the kiln smoke. The guide vanes 220 are uniformly distributed on the column core 210 in a spiral step shape at intervals from top to bottom, and the vertical height difference between adjacent guide vanes 220 is about 0.5 m.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the utility model. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. The utility model provides an external flue gas water conservancy diversion preprocessing device which characterized in that includes:
the smoke inlet is connected with a flue for introducing smoke, and the smoke transmission direction of the flue is vertical to the central axis of the cylinder and does not pass through the central axis of the cylinder;
a flow directing structure disposed within the fluid cavity from the smoke inlet to the smoke outlet; the flow guide structure comprises a column core and a plurality of flow guide sheets, the central axis of the column core is superposed with the central axis of the cylinder body, and the flow guide sheets are distributed on the column core in a surrounding manner; one end of the flow deflector is fixedly connected with the inner wall of the cylinder body, and the other end of the flow deflector is fixedly connected with the column core; the projections of the plurality of flow deflectors on the horizontal plane along the central axis of the cylinder body are not overlapped or partially overlapped;
the pre-spraying device is arranged on the flue and/or the cylinder and is used for spraying water or an absorbent to the flue gas to cool or pre-desulfurize the flue gas.
2. The external smoke diversion pretreatment device of claim 1, wherein the number of the smoke inlets is 3, and the included angle of the smoke transmission direction of the smoke channel connected with the adjacent smoke inlets is 120 °.
3. The external smoke diversion pretreatment device of claim 1, wherein the number of the smoke inlets is 4, and the included angle of the smoke transmission direction of the smoke channel connected with the adjacent smoke inlets is 90 °.
4. The external flue gas diversion pretreatment device of claim 1, wherein a liquid outlet for discharging liquid is arranged at the bottom of the cylinder.
5. The external flue gas diversion pretreatment device of claim 1, wherein the ratio coefficient of the diameter of the cylinder to the total flue gas flow introduced into the cylinder is 1 m: (8.3-11.5 ten thousand) m3H, the height of the cylinder is (d)Smoke inlet+dCigarette outlet+4m)～(dSmoke inlet+dCigarette outlet+6.5m)。
6. The external flue gas diversion pretreatment device of claim 1, wherein the pre-spraying device comprises a first pre-spraying device and a second pre-spraying device; the first pre-spraying device is arranged on the flue at a distance of 1.0-2.0 m from the flue, and a nozzle of the first pre-spraying device faces to a direction vertical to the transmission direction of fluid in the flue; the second pre-spraying device is arranged on the cylinder body, and a nozzle of the second pre-spraying device faces to the direction vertical to and/or parallel to the central axis of the cylinder body.
7. The external flue gas diversion pretreatment device of claim 1, wherein the proportionality coefficient of the diameter of the flue gas inlet to the total flue gas flow introduced into the cylinder is 1 m: (23.8-25.8 ten thousand) m3The ratio coefficient of the diameter of the smoke outlet to the total smoke flow introduced into the cylinder body is 1 m: (18.5 to 20 ten thousand) m3/h。
8. The external smoke diversion pretreatment device of any one of claims 1 to 7, wherein the diversion piece is a circular arc diversion piece, and a concave surface of the diversion piece is arranged in an upward inclined manner.
9. The external smoke diversion pretreatment device of claim 8, wherein the number of the diversion sheets is 6-10, and the windward area of each diversion sheet is 0.48 pi r2sin7.5°～0.495πr2sin15 deg., where r is the radius of the cylinder.
10. The external flue gas diversion pretreatment device of claim 8, wherein a plurality of the diversion pieces are spirally and stepwisely arranged on the column core by taking a central axis of the column core as an axis, and a symmetry axis of the diversion piece is perpendicular to the central axis of the column core.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120917611.8U CN216093044U (en) | 2021-04-29 | 2021-04-29 | External flue gas water conservancy diversion preprocessing device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120917611.8U CN216093044U (en) | 2021-04-29 | 2021-04-29 | External flue gas water conservancy diversion preprocessing device |
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| CN216093044U true CN216093044U (en) | 2022-03-22 |
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| CN202120917611.8U Active CN216093044U (en) | 2021-04-29 | 2021-04-29 | External flue gas water conservancy diversion preprocessing device |
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