CN214210019U - Single-tower desulfurization ultra-clean treatment system - Google Patents
Single-tower desulfurization ultra-clean treatment system Download PDFInfo
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- CN214210019U CN214210019U CN202023037810.4U CN202023037810U CN214210019U CN 214210019 U CN214210019 U CN 214210019U CN 202023037810 U CN202023037810 U CN 202023037810U CN 214210019 U CN214210019 U CN 214210019U
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Abstract
The utility model relates to the technical field of flue gas desulfurization, and discloses a single-tower desulfurization ultra-clean treatment system, which comprises a pre-absorption device and a desulfurization tower, wherein the pre-absorption device adopts spraying to pre-absorb flue gas; an absorption tower, a turbulence synergistic plate, a spraying layer, a slurry circulating pump, a synergistic dust removal device and a demister are sequentially arranged in the desulfurizing tower from bottom to top; and the pre-absorbed flue gas enters a desulfurizing tower through an absorption tower to finally complete the desulfurization ultra-clean treatment. The utility model discloses in, the flue gas is through absorbing the washing in advance, 20 ~ 30% SO2The carbon dioxide is captured, and the reduction of temperature and concentration is more beneficial to the absorption of a subsequent absorption tower; besides, the design of the turbulence synergistic plate and the synergistic dust removal device further improves the desulfurization efficiency and the desulfurization capacity. The system can be used for absorbing SO at the inlet of a single tower absorption tower2The concentration is less than or equal to 6200mg/Nm3Under the condition, the SO at the outlet of the absorption tower is realized2Concentration value below 35mg/Nm3The concentration value of the particles is lower than 5mg/Nm3The emission requirements of (2).
Description
Technical Field
The utility model relates to a flue gas desulfurization technical field, in particular to single-tower desulfurization ultra-clean processing system.
Background
At present, the flue gas desulfurization treatment of over 90 percent of domestic coal-fired units adopts a limestone/lime-gypsum wet desulfurization process, and the process is used for SO2Has high removing efficiency. Along with the improvement of benefits, the operation cost of enterprises is controlled, the coal quality source changes greatly, and the domestic requirements on the smoke emission are all controlled by ultra-clean indexes (SO)2≤35mg/Nm3Dust is less than or equal to 10mg/Nm3) Thus greatly limiting the efficiency of a single-column process, at the inlet SO2The discharge concentration exceeds 4000mg/Nm3Under the condition, most enterprises adopt a double-tower double-circulation process route, but the defects of large floor area, high investment cost, high operating cost and the like exist; the improvement of the single-tower treatment capacity, no increase of occupied area, reduction of operation cost and convenient maintenance become a research hotspot in the current technical field of flue gas desulfurization and dust removal, and the development of an efficient high-concentration single-tower desulfurization ultra-clean treatment process is also necessary.
In addition, the existing desulfurization technology has the difficulties that the flue gas flow field entering the absorption tower is not uniform, the specific surface area of a liquid film is increased, and the contact time of the flue gas and liquid drops is prolonged. In order to improve the flue gas flow field entering the absorption tower, a guide vane is added at an inlet, and a tray is added on the inlet, so that the flue gas flow field is more uniform compared with the case of adding the guide vane, but the thickness of a liquid film is increased along with the improvement of desulfurization efficiency.
In addition, when the flue gas SO2When the concentration content is higher, the final flue gas desulfurization effect is influenced by the limitation of the desulfurization effect of the absorption tower, and higher SO cannot be solved2And (5) desulfurization treatment of the concentration flue gas.
Therefore, it is necessary to design a single-tower ultra-clean desulfurization treatment system to solve the above problems.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a single-tower desulfurization ultra-clean processing system to solve among the prior art single-tower desulfurization with high costs, inefficiency and desulfurization scheduling problem not up to standard.
In order to achieve the purpose, the utility model provides a single-tower desulfurization ultra-clean treatment system, which comprises a desulfurization tower and a pre-absorption device; wherein:
the pre-absorption device comprises a pre-spraying circulating pump, a pre-spraying circulating box, a flue and a pre-spraying layer; the pre-spraying layer is arranged in the flue, the lower end of the flue is communicated with the pre-spraying circulation box, and the pre-spraying circulation box is communicated with the pre-spraying layer through a pre-spraying circulation pump to convey spraying liquid;
the desulfurization tower comprises an absorption tower, a synergistic dust removal device arranged above the absorption tower, a turbulence synergistic plate, a spraying layer and a demister, wherein the turbulence synergistic plate, the spraying layer and the demister are sequentially arranged above the absorption tower from bottom to top; a slurry circulating pump is arranged between the spraying layer and the absorption tower, and the surface of the turbulent flow synergistic plate is provided with openings;
the flue outlet is communicated with the absorption tower.
Furthermore, the turbulence synergistic plate covers the whole section of the absorption tower, a plurality of openings are formed in a square with an inscribed section, the opening rate is 40%, and the opening rate of the outer edge of the square is 15%; preferably, a hole with polygonal saw teeth is formed in a square inscribed in the cross section of the turbulence synergistic plate.
Further, the collaborative dust removal device is located between the spraying layer and the demister.
Further, the collaborative dust removal device covers the whole section of the absorption tower, saw-tooth holes are formed in the surface of the collaborative dust removal device, and the total area of the holes is 40% of the section of the absorption tower.
Further, the pre-spraying layer is arranged in a concurrent flow mode.
Furthermore, the spray pipe of the pre-spray layer is of a pipe network type and is made of 2205 stainless steel.
Furthermore, the nozzles of the pre-spraying layer adopt solid cone nozzles, and the material is 2205 stainless steel.
The utility model discloses a technological effect and advantage:
1. the utility model discloses upper reaches flue department at the absorption tower sets up one set of absorbing device in advance, and the flue gas is through absorbing device in advance, and SOx and particulate matter in this in-process flue gas are got into the absorption tower by clear water liquid drop entrapment, have reduced desulfurizing tower desulfurization pressure, have promoted desulfurization effect better.
2. The utility model discloses in designed vortex increase board according to the characteristic in desulfurizing tower flue gas flow field, adopt unbalanced trompil, make the flue gas equipartition, the flow field is more in the same direction as, different with the conventional art, vortex increase board uses the gas velocity as the disturbance main parameter, make the thick liquid form heterogeneous attitude in the air current, the gas-liquid mixes at heterogeneous attitude, mass transfer and heat transfer, the gas-liquid mass transfer heat transfer contact time has been improved greatly, the liquid film is constantly updated, the gas-liquid contact is abundant, compare in simple tray tower, the liquid film is changed more frequently, gas-liquid mass transfer efficiency has also greatly been improved. In addition, set up the hole of taking multilateral sawtooth in the middle of the vortex increase board, because high-speed flue gas is very fast at sawtooth edge speed, behind the hole of sawtooth was passed through to the flue gas, the foam of formation broke very easily, had ensured the surface area of liquid film greatly, had increased the contact time of flue gas, had improved desulfurization efficiency.
3. The utility model discloses well dust collector in coordination of design arranges in top layer shower top, covers whole absorption tower cross-section, comprises a plurality of sawtooth holes, and dust removal effect is better.
4. The utility model provides a single-tower desulfurization ultra-clean processing system easy operation, performability is strong, and it is less to change original system, only need the installation should spray system, vortex increase board and dust collector in coordination in advance just can realize that the flue gas carries the effect in advance, can be at single-tower absorption tower entry SO2The concentration is less than or equal to 6200mg/Nm3Under the condition, the SO at the outlet of the absorption tower is realized2Concentration value below 35mg/Nm3The concentration value of the particles is lower than 5mg/Nm3The emission requirements of (2).
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
FIG. 1 is the overall schematic diagram of the ultra-clean treatment system for single-tower desulfurization.
Fig. 2 is a schematic structural view of the spoiler with enhanced effect of the present invention.
In the figure: 101 pre-spraying circulating pump, 102 pre-spraying circulating box, 103 flue, 104 pre-spraying layer, 201 absorption tower, 202 turbulence synergistic plate, 203 spraying layer, 204 slurry circulating pump, 205 synergistic dust removal device and 206 high-efficiency demister.
Detailed Description
In order to make the objects, technical solutions and advantageous technical effects of the present invention more clearly understood, the present invention is further described in detail with reference to the accompanying drawings and the following detailed description. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration only and not by way of limitation.
As shown in FIG. 1, the utility model provides a single-tower ultra-clean desulfurization treatment system, which comprises a pre-absorption device arranged at the upstream and a desulfurization tower; the pre-absorption device comprises a pre-spraying circulating pump 101, a pre-spraying circulating box 102, a flue 103 and a pre-spraying layer 104; the pre-spraying layer 104 is arranged in the flue 103, the lower end of the flue 103 is communicated with the pre-spraying circulation box 102, and the pre-spraying circulation box 102 is communicated with the pre-spraying layer 104 through a pre-spraying circulation pump 101 to convey spraying liquid;
the desulfurizing tower comprises an absorption tower 201, a turbulent flow synergistic plate 202, a spraying layer 203 and a demister 206 which are arranged in sequence from bottom to top, and further comprises a collaborative dust removal device 205; a slurry circulating pump 204 is arranged between the spraying layer 203 and the absorption tower 201, the surface of the turbulence synergistic plate 202 is provided with openings, and the demister 206 is communicated with a process water pipe;
the outlet of the flue 103 is communicated with the absorption tower 201.
Further, the collaborative dust removal device 205 is located between the spray layer 203 and the mist eliminator 206.
Further, as shown in fig. 2, the area of the turbulence enhancing plate 202 is the area of the inner cross section of the desulfurization tower, a hole with polygonal saw teeth is formed in the middle inscribed square, the aperture ratio is 40%, and the aperture ratio at the edge is 15%; preferably, the material of the turbulence synergistic plate is 2205 stainless steel.
Further, the cooperative dust removing device 205 covers the whole section of the absorption tower, saw-tooth holes are formed in the surface of the absorption tower, and the total area of the holes is 40% of the section of the absorption tower.
Further, the absorption tower 201 is further provided with a stirring paddle for stirring the absorption slurry, so as to ensure the uniformity of the absorption slurry.
Preferably, the pre-spraying layer 104 is arranged in a downstream manner, the spraying pipes of the pre-spraying layer 104 are of a pipe network type, and the material is 2205 stainless steel; the nozzles of the pre-spraying layer 104 adopt solid cone nozzles, and the material adopts 2205.
The utility model provides an among the single tower desulfurization ultra-clean processing system, the desulfurizing tower entry is the rectangle flue, with absorption tower 201 intercommunication, and the flue gas velocity of flow that gets into the desulfurizing tower is 12 ~ 15 ms, and the velocity of flow of absorption tower is 3 ~ 4 ms, sprays the liquid-gas ratio that layer 104 controlled in advance and is less than or equal to 0.5L Nm3(ii) a Preferably, the pre-spray layer is arranged in a concurrent manner.
Further, the mist eliminator 206 is of the ridge type; the center lines of the collaborative dust removal device 206 and the top layer spray pipe 203 are not lower than 1.5m, and the distance between the collaborative dust removal device 206 and the high-efficiency demister is 3-3.5 m.
In the scheme, due to the characteristic of the flue gas at the inlet, high-speed ascending airflow is formed near the inner wall of the tower far away from the flue gas inlet, local negative pressure is generated on the inner wall of the tower close to the flue gas inlet, and a vortex is formed, so that the flue gas is difficult to uniformly contact with spray liquid, the mass transfer of gas phase and liquid phase is seriously influenced, and the phenomenon of flue gas escape is caused. For creating an even flow field, the flue gas import sets up one deck vortex increase board 202 with spraying layer 203, vortex increase board adopts unbalanced percentage of opening to arrange, the middle percentage of opening is high, the edge percentage of opening is low, fine jet effect who avoids the flue gas, for improving desulfurization efficiency, reduce the influence of foam to flue gas desulfurization efficiency, set up the hole of taking multilateral sawtooth in the middle of vortex increase board 202, because high-speed flue gas is very fast at sawtooth edge speed, the flue gas passes through the hole of sawtooth after, the foam of formation breaks very easily, the surface area of liquid film has been ensured greatly, the contact time of flue gas has been increased, desulfurization efficiency has been improved.
It is right below the single-tower desulfurization ultra-clean treatment system working process and principle are explained.
The utility model discloses in the above-mentioned pre-absorption device, when starting the pre-absorption, the flue gas is through the clear water washing, 20 ~ 30% SO in flue 103 via the draught fanxThe trapped acid-containing wastewater is recycled through the pre-spraying circulation box 102, the temperature of the flue gas is reduced, so that the absorption of a subsequent absorption tower is facilitated, and the flow of clear water and spraying liquid can be selected according to the working condition to reach the required flue gas temperature.
The flue gas is treated by the pre-absorption device and then enters the desulfurization tower for further absorption and desulfurization, the flue gas in the absorption tower 201 rises and enters the turbulence synergistic plate 202, the vortex of the flue gas is destroyed, the liquid film sprayed by the spraying layer 203 absorbs the desulfurization, and the absorption slurry returns to the absorption tower 201 downwards and then is injected into the spraying layer 203 through the slurry circulating pump 204 for circulating spraying; the flue gas passes through the spraying layer 203, is dedusted by the collaborative dedusting device 204, and is demisted by the demister 206, and then can be discharged.
The utility model provides a single-tower desulfurization ultra-cleanThe treatment system has simple operation and strong performability, changes little to the original system, can realize flue gas efficiency improvement only by installing the pre-spraying system, the turbulence synergistic plate and the synergistic dust removal device, and can realize flue gas efficiency improvement at the inlet SO of the single-tower absorption tower2The concentration is less than or equal to 6200mg/Nm3Under the condition, the SO at the outlet of the absorption tower is realized2Concentration value below 35mg/Nm3The concentration value of the particles is lower than 5mg/Nm3The emission requirements of (2).
The invention is not limited solely to that described in the specification and the embodiments, and additional advantages and modifications will readily occur to those skilled in the art, and it is not intended to be limited to the specific details, representative apparatus, and illustrative examples shown and described herein, without departing from the spirit and scope of the general concept as defined by the appended claims and their equivalents.
Claims (8)
1. A single-tower desulfurization ultra-clean treatment system is characterized by comprising a desulfurization tower and a pre-absorption device;
the pre-absorption device comprises a pre-spraying circulating pump (101), a pre-spraying circulating box (102), a flue (103) and a pre-spraying layer (104); the pre-spraying layer (104) is arranged in the flue (103), the lower end of the flue (103) is communicated with the pre-spraying circulation box (102), and the pre-spraying circulation box (102) is communicated with the pre-spraying layer (104) through a pre-spraying circulation pump (101) to convey spraying liquid;
the desulfurization tower comprises an absorption tower (201), a collaborative dust removal device (205) arranged above the absorption tower (201), a turbulent flow synergistic plate (202), a spraying layer (203) and a demister (206), wherein the turbulent flow synergistic plate, the spraying layer and the demister (202) are sequentially arranged above the absorption tower (201) from bottom to top; a slurry circulating pump (204) is arranged between the spraying layer (203) and the absorption tower (201), and the surface of the turbulence synergistic plate (202) is provided with openings;
the outlet of the flue (103) is communicated with the absorption tower (201).
2. The single tower desulfurization ultra-clean treatment system of claim 1, wherein the flow disturbance enhancement plate (202) covers the whole absorption tower cross section, and a plurality of openings are arranged in a square inscribed in the cross section, the opening rate is 40%, and the opening rate of the outer edge of the square is 15%.
3. The single-tower desulfurization ultra-clean treatment system of claim 2, wherein the cross section of the flow disturbing synergistic plate (202) is internally connected with a square, and holes with polygonal saw teeth are arranged in the square.
4. The single tower desulfurization ultra-clean treatment system of claim 1, characterized in that said cooperative dust removal device (205) is located between the spray level (203) and the mist eliminator (206).
5. The single-tower ultra-clean desulfurization treatment system according to claim 1, wherein the cooperative dust-removing device (205) covers the whole cross section of the absorption tower, and is provided with saw-toothed holes on the surface, and the total area of the holes is 40% of the cross section of the absorption tower.
6. The single tower desulfurization ultra-clean treatment system of claim 1, wherein said pre-spray layer (104) is arranged in a forward flow manner.
7. The single-tower desulfurization ultra-clean treatment system according to claim 1, characterized in that the spray pipes of the pre-spray layer (104) are made of pipe network type and 2205 stainless steel.
8. The single-tower desulfurization ultra-clean treatment system of claim 1, characterized in that the nozzles of the pre-spray layer (104) are solid cone nozzles and are made of 2205 stainless steel.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202023037810.4U CN214210019U (en) | 2020-12-16 | 2020-12-16 | Single-tower desulfurization ultra-clean treatment system |
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| CN202023037810.4U CN214210019U (en) | 2020-12-16 | 2020-12-16 | Single-tower desulfurization ultra-clean treatment system |
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