Technical Field
The utility model relates to a semi-dry desulfurization technical field, concretely relates to high-efficient SDS dry desulphurization unit.
Background
From 2018, the state enforces that a gas boiler implements stricter emission standards and limits a wet desulphurization process, and an SDS (sodium dodecyl sulfate) dry desulphurization process becomes a preferred process for coke oven flue gas desulphurization of large-scale domestic steel union enterprises.
Because the sulfur dioxide concentration of the coke oven flue gas is lower, the SDS process has already formed the mainstream in the domestic coke oven flue gas control at present, and popularize to other gas industrial kilns gradually. However, the traditional SDS dry desulfurization process is only suitable for the working condition of flue gas with lower concentration of sulfur dioxide at the inlet, namely in the original SO condition2The concentration is less than 500mg/Nm3While ensuring the SO at the outlet2The concentration is less than 50mg/Nm3Can completely meet the current national emission requirements. If a lower exit index is required, this can only be achieved by increasing the injection amount of the desulfurizing agent, which results in a lower utilization rate of the desulfurizing agent. And for the treatment of medium and high sulfur flue gas, in the original SO2The concentration is more than 500mg/Nm3While, the outlet SO2The concentration can not meet the index requirement of ultra-low emission at all.
SUMMERY OF THE UTILITY MODEL
The utility model discloses to the technical problem who exists among the prior art, provide a high-efficient SDS dry process desulphurization unit, can improve SDS dry process desulfurization efficiency, improve the utilization ratio of desulfurizer, make its export SO that can satisfy under the flue gas operating mode condition of well high sulphur2Ultra-low emission requirements.
The utility model provides an above-mentioned technical problem's technical scheme as follows: a high-efficiency SDS dry desulphurization device comprises a desulfurizer charging bucket, a desulphurization reactor, a flue gas input pipe and a dedusting assembly, wherein the desulphurization reactor comprises a two-stage reactor, a first desulphurization reactor and a second desulphurization reactor which are connected in series; the flue gas input pipe is communicated with the inlet of the first desulfurization reactor, the outlet of the second desulfurization reactor is communicated with one end of a flue gas output pipe, and the other end of the flue gas output pipe is connected with the inlet of the dedusting assembly; the outlet of the dust removal component is connected with a clean smoke pipe, and the output end of the clean smoke pipe is connected with the smoke inlet of the chimney; the desulfurizer charging bucket is respectively connected with the feed inlets of the first desulfurization reactor and the second desulfurization reactor through pipelines.
On the basis of the technical scheme, the utility model discloses can also do following improvement.
Further, the discharge gate and the conveying pipe intercommunication of desulfurizer material jar, the conveying pipe has two branch pipes, links to each other with the feed inlet of first desulfurization reactor and second desulfurization reactor respectively.
Further, a conveying pump is installed on the feeding pipe.
Further, be provided with the mill between the discharge gate of desulfurizer material jar and the conveying pipe, the discharge gate of desulfurizer material jar links to each other with the entry of mill, the exit linkage conveying pipe of mill.
Further, the first desulfurization reactor and the second desulfurization reactor are horizontally arranged.
Further, the dust removal assembly is a bag type dust remover.
Further, an ash collecting component is arranged at an ash outlet of the dust removing component.
Further, a booster fan is installed on the clean smoke pipe.
The utility model has the advantages that: the utility model discloses dispose the two-stage desulfurization reactor of series connection, handled the well high-sulfur flue gas, made the flue gas through first desulfurization reactor preliminary treatment, made SO2The concentration is reduced to a certain degree and then is introducedThe first desulfurization reactor is used for desulfurization treatment again to ensure that SO is generated2The concentration is reduced to the ultra-low emission standard, compared with the prior dry desulfurization technology, the desulfurization efficiency can be greatly improved, the utilization rate of the desulfurizer is improved, and the faults of whole flue gas pipeline blockage and the like caused by excessive desulfurizer injection are avoided.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of the present invention;
in the drawings, the components represented by the respective reference numerals are listed below:
1. desulfurizer material jar, 2, mill, 3, conveying pipe, 4, delivery pump, 5, one-level desulfurization reactor, 6, second grade desulfurization reactor, 7, flue gas input tube, 8, flue gas output tube, 9, dust removal subassembly, 10, ash outlet, 11, clean tobacco pipe, 12, booster fan, 13, chimney.
Detailed Description
The principles and features of the present invention are described below in conjunction with the following drawings, the examples given are only intended to illustrate the present invention and are not intended to limit the scope of the present invention.
As shown in figure 1, the utility model relates to a high-efficient SDS dry desulphurization unit, including desulfurizer material jar 1, desulfurization reactor, flue gas input tube 7 and dust removal component 9.
The embodiment of the utility model provides a desulfurization reactor including the two-stage reactor of establishing ties, first desulfurization reactor 5 and second desulfurization reactor 6, the two is established ties through the pipeline. The desulfurizer charging bucket 1 is respectively connected with the feed inlets of the first desulfurization reactor 5 and the second desulfurization reactor 6 through pipelines. The flue gas input pipe 7 is communicated with an inlet of the first desulfurization reactor 5, an outlet of the second desulfurization reactor 6 is communicated with one end of a flue gas output pipe 8, and the other end of the flue gas output pipe 8 is connected with an inlet of the dust removal assembly 9.
The outlet of the dust removal component 9 is connected with a clean smoke pipe 11, and the output end of the clean smoke pipe 11 is connected with the smoke inlet of a chimney 13;
the utility model discloses still provide modified technical scheme, in modified technical scheme, desulfurizer material jar 1's discharge gate and conveying pipe 3 intercommunication, conveying pipe 3 has two branch pipes, links to each other with the feed inlet of first desulfurization reactor 5 and second desulfurization reactor 6 respectively.
Preferably, a delivery pump 4 is installed on the feeding pipe 3.
The feeding pipe 3 and the delivery pump 4 are adopted to convey the desulfurizer, so that the environment pollution caused by the leakage of the desulfurizer can be effectively avoided, and the pipeline blockage can be avoided due to the pressurization effect of the delivery pump 4.
The utility model also provides a modified technical scheme, in the modified technical scheme, be provided with grinder 2 between desulfurizer material jar 1's discharge gate and the conveying pipe 3, desulfurizer material jar 1's discharge gate links to each other with grinder 2's entry, grinder 2's exit linkage conveying pipe 3.
After the grinder 2 is arranged, the desulfurizer sent out by the desulfurizer tank 1 can be ground and levigated, so that the desulfurizer becomes powder with finer granularity and is sprayed into the first desulfurization reactor 5 and the second desulfurization reactor 6, the contact area and time of the desulfurizer and flue gas can be further improved, and the desulfurization efficiency is further improved.
The utility model discloses still provide modified technical scheme, in modified technical scheme, first desulfurization reactor 5 and 6 horizontal arrangements of second desulfurization reactor.
The arrangement mode can lead the flue gas to form convection with the desulfurizer in the reactor, and simultaneously can prolong the retention time of the flue gas in the reactor, thereby further improving the desulfurization efficiency.
The utility model discloses still provide modified technical scheme, in modified technical scheme, dust removal subassembly 9 is the bag collector.
Preferably, an ash collection assembly is arranged at the ash outlet 10 of the dust removal assembly 9.
The utility model also provides an improved technical scheme, in improved technical scheme, install booster fan 12 on the clean tobacco pipe 11.
This scheme can increase the pressure of pipeline when pipeline pressure is not enough, makes the flue gas flow more smoothly.
The utility model discloses the theory of operation as follows:
the desulfurizer enters the grinder 2 through the discharge port of the desulfurizer tank 1 and is ground into superfine powder, and then is pumped into the first desulfurization reactor 5 and the second desulfurization reactor 6 through the delivery pump 4 and the branch pipe of the delivery pipe 4 through the delivery pipe 3.
The kiln flue gas is provided with pressure by a flue gas main exhaust fan, and is sent into a first desulfurization reactor 5 through a flue gas input pipe 7 to be subjected to first-step desulfurization treatment; then enters a second desulfurization reactor 6 for secondary desulfurization treatment, and the SO of the flue gas subjected to the secondary desulfurization treatment is2The concentration has been reduced to ultra-low emission standards.
The flue gas after the two times of desulfurization treatment is sent to a dust removal component 9 by a flue gas output pipe 8 for dust removal treatment. The processed ash is discharged from an ash outlet 10 at the bottom of the dust removing assembly 9 and is collected and reused by an ash collecting assembly.
The treated clean flue gas is pressurized by a booster fan 12 through a clean flue pipe 11 and then sent to a chimney 12 to be discharged.
The utility model has high desulfurization efficiency and original SO2The concentration is more than or equal to 500mg/Nm3When the concentration of the outlet SO2 can be 40mg/Nm3The following.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.
If you have any questions on High Efficiency Dry Desulfurizer. We will give the professional answers to your questions.