CN115487541B - Large-diameter dense fixed bed adsorption tower and flow field regulating and controlling method thereof - Google Patents
Large-diameter dense fixed bed adsorption tower and flow field regulating and controlling method thereof Download PDFInfo
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- CN115487541B CN115487541B CN202211285155.5A CN202211285155A CN115487541B CN 115487541 B CN115487541 B CN 115487541B CN 202211285155 A CN202211285155 A CN 202211285155A CN 115487541 B CN115487541 B CN 115487541B
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- 238000001179 sorption measurement Methods 0.000 title claims abstract description 109
- 230000001105 regulatory effect Effects 0.000 title claims abstract description 31
- 238000000034 method Methods 0.000 title claims abstract description 10
- 230000001276 controlling effect Effects 0.000 title description 6
- 239000007788 liquid Substances 0.000 claims abstract description 156
- 239000011347 resin Substances 0.000 claims abstract description 58
- 229920005989 resin Polymers 0.000 claims abstract description 58
- 238000001914 filtration Methods 0.000 claims abstract description 38
- 238000005070 sampling Methods 0.000 claims abstract description 23
- 238000005192 partition Methods 0.000 claims description 30
- 229910052751 metal Inorganic materials 0.000 claims description 26
- 239000002184 metal Substances 0.000 claims description 26
- 229910001338 liquidmetal Inorganic materials 0.000 claims description 17
- 238000010521 absorption reaction Methods 0.000 claims description 11
- 229920011532 unplasticized polyvinyl chloride Polymers 0.000 claims description 7
- 239000004744 fabric Substances 0.000 claims description 3
- 230000002159 abnormal effect Effects 0.000 claims description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 9
- 239000010935 stainless steel Substances 0.000 description 7
- 238000009730 filament winding Methods 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000011550 stock solution Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 238000005056 compaction Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 229910052770 Uranium Inorganic materials 0.000 description 1
- 230000005856 abnormality Effects 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005465 channeling Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000003203 everyday effect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000002386 leaching Methods 0.000 description 1
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- JFALSRSLKYAFGM-UHFFFAOYSA-N uranium(0) Chemical compound [U] JFALSRSLKYAFGM-UHFFFAOYSA-N 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
- 238000010618 wire wrap Methods 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D36/00—Filter circuits or combinations of filters with other separating devices
- B01D36/003—Filters in combination with devices for the removal of liquids
- B01D36/006—Purge means
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D15/00—Separating processes involving the treatment of liquids with solid sorbents; Apparatus therefor
- B01D15/08—Selective adsorption, e.g. chromatography
- B01D15/10—Selective adsorption, e.g. chromatography characterised by constructional or operational features
- B01D15/18—Selective adsorption, e.g. chromatography characterised by constructional or operational features relating to flow patterns
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/01—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with flat filtering elements
- B01D29/05—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with flat filtering elements supported
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Abstract
The invention provides a large-diameter compact fixed bed adsorption tower and a flow field regulating method thereof, wherein a liquid distributor is arranged at the inner top of an adsorption tower body to be introduced with adsorption raw liquid, a resin bed layer is arranged in the adsorption tower body, the inner bottom space of the adsorption tower body is divided into N filtering subareas by a tail liquid filtering device, the bottom of each filtering subarea is provided with a liquid outlet to discharge tail liquid after separating resin, the bottom of each liquid outlet is connected with a liquid tail pipe, a regulating valve is arranged on each liquid tail pipe to regulate the liquid outlet flow of the liquid tail pipe, the bottom outlets of the N liquid tail pipes are all connected to a liquid outlet main pipe, sampling ports are arranged on each liquid tail pipe, sampling valves are arranged on the sampling ports, and the outlet of the liquid outlet main pipe is an adsorption tail liquid outlet. The flow field at the lower part of the resin bed layer is uniformly distributed, and the resin utilization rate is high.
Description
Technical Field
The invention relates to the technical field of adsorption towers, in particular to a large-diameter dense fixed bed adsorption tower and a flow field regulating method thereof.
Background
The dense fixed bed adsorption tower is simple to operate and high in treatment flow, is widely applied to adsorption of the leaching solution of the in-situ uranium mine, resin in the tower is in a dense state in the adsorption process, adsorption stock solution enters from the tower top, and tail solution is discharged from the tower bottom.
The dense fixed bed adsorption tower is easy to generate bed channeling, large dead angle and other problems in practical application; the diameter of the large-flux large-section dense fixed bed adsorption tower is more than 5.5 meters, compared with the diameter of an adsorption tower (tower diameter is 3 meters) commonly used in the current production, the diameter ratio of a resin bed layer is correspondingly reduced, the problems are easier to occur, and along with the increase of the diameter of the adsorption tower, the downward flow velocity of the adsorption stock solution on the same horizontal section of the resin bed layer can be greatly different, namely, the flow fields are respectively uneven, so that the resin saturation degree is different, and the resin utilization rate is low.
The diameter of the compact fixed bed adsorption tower applied to the current production is smaller (about 3 meters), the resin bed layer is relatively higher (about 4 meters), and the problem of uneven flow field distribution is not outstanding. However, the tower diameter of the large-flux dense fixed bed adsorption tower is about 6 meters, the horizontal sectional area is 4 times of that of a common adsorption tower, the resin bed layer is about 4 meters, and uneven flow field distribution becomes a problem which needs to be solved.
The dense fixed bed adsorption tower that uses in the present production establishes the absorption stoste import at the upper cover, and resin bed upper portion has a space (called compaction layer) of about 2 meters, and this space is full of the absorption stoste, plays absorption stoste equipartition and compaction resin's effect, has the filter that is "cross" font arrangement in the adsorption tower bottom resin bed (its structure is usually with the pipeline of opening a large amount of apertures on the pipe wall as the support, and the pipeline outside wraps up multilayer silk screen), realizes the separation of resin and absorption tail liquid, and absorption tail liquid flows out from the bottom of the tower through the pipeline from "cross" font center.
The structure can be applied to the adsorption tower with the diameter of less than 3 meters, but the following problems can occur when the structure is directly applied to the adsorption tower with the diameter of 6 meters:
1. the adsorption stock solution directly flows downwards from the top opening of the tower, and because of the large flow of the inlet solution, the liquid directly impacts the resin right below the feed inlet to form a pit, and part of the resin is entrained to circulate in the compacting layer, so that the upper resin bed layer is unstable.
2. The filter that is "cross" font arrangement in the resin bed of adsorption tower bottom is the export of absorption tail liquid, compares with the cross-section of diameter 6 meters, and the export area is too little, too concentrated, causes resin bed lower part flow field uneven distribution, and the dead zone is too big, and the adsorption tower pierces through the volume little, and resin saturation concentration is low, and resin utilization ratio is low.
3. The silk screen of the filter has low strength and is easy to damage; the filter layer is formed by wrapping a plurality of layers of silk screens, is easily blocked by broken resin, and the filtering capability is obviously reduced along with the accumulation of the treatment capacity.
Disclosure of Invention
The invention aims at overcoming the technical defects in the prior art and provides a large-diameter dense fixed bed adsorption tower.
The invention further aims to provide a flow field regulating method of the large-diameter compact fixed bed adsorption tower.
The technical scheme adopted for realizing the purpose of the invention is as follows:
the utility model provides a closely knit fixed bed adsorption tower of major diameter, includes the adsorption tower body, the internal top of adsorption tower is equipped with the cloth liquid ware in order to let in the absorption stoste, the inside resin bed that is equipped with of adsorption tower, the internal bottom space of adsorption tower is separated into N by tail liquid filter equipment and is filtered the subregion, tail liquid filter equipment is used for separating resin, and the bottom of each filtration subregion is equipped with a liquid outlet and in order to discharge the tail liquid after separating resin, and a liquid tail pipe is connected to the bottom of each liquid outlet, sets up the governing valve on each liquid tail pipe in order to regulate and control the liquid flow of this liquid tail pipe, and the bottom export of N liquid tail pipe all is connected to the play liquid house steward, all is equipped with the sample connection on each liquid tail pipe, set up sampling valve on the sample connection, play liquid house steward's export is the export of absorption tail liquid.
In the above technical scheme, the liquid distributor comprises a connecting pipe and a blind plate, the connecting pipe stretches into the adsorption tower body from the upper end socket of the adsorption tower body, the upper part of the connecting pipe is communicated with the liquid inlet, the blind plate is welded at the lower part of the connecting pipe, and through holes are formed in the connecting pipe and the blind plate.
In the above technical scheme, the inner bottom of the adsorption tower body is divided into m annular partitions from inside to outside, and then each annular partition is uniformly divided, so that N filtering partitions are finally formed.
In the technical scheme, the inner bottom of the adsorption tower body is divided into the inner ring and the outer ring with the same width from inside to outside, wherein the outer ring is provided with 8 filtering partitions, the inner ring is provided with 4 filtering partitions, and the inner bottom of the adsorption tower body is divided into 12 filtering partitions.
In the above technical scheme, the liquid outlet tail pipe at the lower part of the regulating valve is a transparent UPVC pipe, and each transparent UPVC pipe is provided with the sampling port.
In the above technical scheme, the top of the adsorption tower body and the side wall of the bottom of the adsorption tower body are respectively provided with a manhole, and the resin outlet is arranged at the bottommost part of the lower seal head of the adsorption tower body.
In the above technical scheme, the tail liquid filtering device comprises N wire-wrapped sieve tubes, each wire-wrapped sieve tube penetrates through the adsorption tower body and is vertically inserted into the bottom of the resin bed layer to form a filtering zone, and each wire-wrapped sieve tube is connected with one liquid outlet.
In the above technical scheme, the wire-wrapped screen pipe is composed of support ribs, V-shaped wires wound on the support ribs, end plates fixed on the tops of the support ribs, and clamping plates fixed on the bottoms of the support ribs, and gaps among the V-shaped wires are used for filtering resin.
In the above technical scheme, tail liquid filter equipment includes strip seam sieve board and partition baffle, strip seam sieve board with there is the clearance between the adsorption tower low head, set up in the clearance partition baffle with interval N filtering partition.
In the technical scheme, the slotted screen plate is composed of the supporting ribs and the V-shaped wires welded on the supporting ribs in parallel, and gaps among the V-shaped wires are used for filtering resin.
In the technical scheme, the shape of the slotted screen plate is consistent with the shape of the lower end enclosure of the adsorption tower, or the slotted screen plate is conical or horizontal circular plate.
In another aspect of the present invention, the flow field regulation method includes the steps of:
the method comprises the steps of sampling through a sampling port, detecting the concentration of tail liquid metal discharged from each liquid outlet, comparing the concentration of tail liquid metal discharged from a liquid outlet main pipe with the concentration of tail liquid metal discharged from the liquid outlet main pipe, when the concentration of tail liquid metal discharged from a certain liquid outlet is higher or lower than the concentration of tail liquid metal of the liquid outlet main pipe by a percentage, considering that the liquid outlet corresponds to the flow field abnormality of a resin bed area, adjusting a regulating valve corresponding to the liquid outlet, specifically, when the concentration of tail liquid metal discharged from a certain liquid outlet is higher than the concentration of tail liquid metal of the liquid outlet main pipe by a percentage, regulating the flow of the liquid outlet through the regulating valve, reducing the flow by 10%, and when the concentration of tail liquid metal discharged from a certain liquid outlet is lower than the concentration of tail liquid metal of the liquid outlet main pipe by a percentage, regulating the flow of the liquid outlet through the regulating valve, and increasing the flow of the liquid outlet by 10%. After adjustment, sampling again to measure the metal concentration, analyzing whether the adsorption normal state is reached, and if the adsorption normal state is not reached, regulating and controlling the flow of the liquid outlet again according to the result of measuring the metal concentration until the adsorption normal state is reached.
In the technical scheme, the value range of a is 10-20.
Compared with the prior art, the invention has the beneficial effects that:
1. the tail liquid filtering device has large filtering area and is uniformly distributed on the lower end enclosure of the adsorption tower, so that the uniformity of the flow field in the resin bed layer can be realized, and no flow dead angle exists.
2. The invention can achieve the effect of improving the flow field in the resin bed layer by regulating the liquid outlet amount of each liquid outlet from the outside.
3. The invention utilizes the support ribs and the V-shaped wire winding to form the filter device, which is not easy to be blocked and enhances the filtering capability.
Drawings
Fig. 1 is a schematic diagram showing the structure of the adsorption tower of the present invention.
FIG. 2 is a cross-sectional view taken along the plane A-A of FIG. 1 (the filter unit employs slotted screen 13 as described in example 3).
FIG. 3 is a schematic view of the arrangement of the wire-wrapped screen of example 2.
FIG. 4 is a schematic view of a wire wrap screen arrangement.
Fig. 5 is a schematic structural view of a wire-wrapped screen.
In the figure: the device comprises a 1-adsorption tower body, a 2-liquid distributor, a 3-liquid outlet, a 4-liquid outlet tail pipe, a 5-regulating valve, a 6-liquid outlet main pipe, a 7-sampling port, an 8-adsorption tail liquid outlet, a 9-liquid inlet, a 10-manhole, a 11-wire-wound sieve pipe, a 12-resin outlet, a 13-slotted sieve plate and a 14-partition baffle;
4-1 transparent UPVC pipe;
11-1-supporting ribs, 11-2-V-shaped wires, 11-3-end plates and 11-4-clamping plates.
Detailed Description
The present invention will be described in further detail with reference to specific examples. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
Example 1
The tailing filter device in this embodiment includes a slotted screen 13 and a partition plate 14.
The utility model provides a closely knit fixed bed adsorption tower of major diameter, includes adsorption tower body 1, the top is equipped with cloth liquid ware 2 in the adsorption tower body 1 in order to let in the absorption stoste, the inside resin bed that is equipped with of adsorption tower body 1 in the bottom space is separated into N by strip seam sieve 13 and partition baffle 14 and is filtered the subregion, strip seam sieve 13 with there is the clearance between the adsorption tower lower head, set up in the clearance partition baffle 14 in order to interval into N and filter the subregion, strip seam sieve 13 is used for separating resin, the bottom of each filtration subregion is equipped with a liquid outlet 3 in order to discharge the tail liquid after separating the resin, the bottom of each liquid outlet 3 is connected a tail pipe 4, sets up governing valve 5 in order to regulate and control the liquid flow of this tail pipe 4 on each tail pipe 4, the bottom export of N tail pipes 4 all is connected to liquid house steward 6, all is equipped with sample connection 7 on each tail pipe 4, sets up the sample valve on the sample connection 7, the export of liquid house steward 6 is adsorption tail liquid export 8.
Preferably, the liquid distributor 2 comprises a connecting pipe and a blind plate, the connecting pipe extends into the adsorption tower body from the upper end socket of the adsorption tower body, the upper part of the connecting pipe is communicated with the liquid inlet 9, the blind plate is welded at the lower part of the connecting pipe, and a certain number of through holes with the diameter of 30mm are formed in the connecting pipe and the blind plate.
Preferably, the inner bottom of the adsorption tower body 1 is divided into m annular partitions from inside to outside, and then each annular partition is uniformly divided, so that N filtering partitions are finally formed. As shown in the figure, m=2, n=12, the inner bottom of the adsorption tower body 1 is divided into an inner ring and an outer ring with the same width from inside to outside, wherein the outer ring has 8 filtering partitions, the inner ring has 4 filtering partitions, and the inner bottom of the adsorption tower body 1 is divided into 12 filtering partitions.
Preferably, the liquid outlet tail pipe 4 at the lower part of the regulating valve 5 is a transparent UPVC pipe 4-1, so that the fluid flow and resin leakage condition of each liquid outlet 3 can be observed at any time, the sampling ports 7 are arranged on each transparent UPVC pipe 4-1, and the flow of each liquid outlet 3 can be regulated based on the comparison result of the tail liquid concentration of each liquid outlet 3, thereby realizing the regulation and control of the internal flow field of the resin bed layer.
Preferably, the top and bottom side walls of the adsorption tower body 1 are provided with manholes 10, and the resin outlet 12 is arranged at the bottommost part of the lower end enclosure of the adsorption tower body 1.
Specifically, in the large-diameter dense fixed bed adsorption tower of this embodiment, the tower body diameter is 6m, the height of the straight section is 7m, and the resin bed layer is 5m, as shown in the figure, the slotted screen 13 is installed at a position about 100mm higher than the lower seal head, so that a circular arc-shaped gap with a height of 100mm is formed between the slotted screen 13 and the lower seal head, the gap is divided into 12 areas by using a stainless steel plate as a partition plate 14, wherein 8 areas are arranged on the outer ring, 4 areas are arranged on the inner ring, 1 DN150 adsorption tail liquid outlet pipe is connected to each area, and the 12 outlet pipes are summarized together to form the liquid outlet main pipe 6. The slotted screen 13 is composed of arc-shaped supporting ribs 11-1 and V-shaped wires 11-2 welded on the supporting ribs 11-1 in parallel, gaps among the V-shaped wires 11-2 are used for filtering, preferably, the supporting ribs 11-1 are stainless steel supporting ribs 11-1, the V-shaped wires 11-2 are V-shaped stainless steel wires, the section width of the V-shaped stainless steel wires is 2mm, the height is 3mm, and the steel wire gaps are 0.25mm.
In addition, the slotted screen 13 can be made into a conical shape or a horizontal circular plate shape, so that the manufacturing and processing are simpler, and the disadvantage is that a part of the volume of the lower end socket is sacrificed, and the lower end socket cannot be used for containing resin.
Example 2
The tail filter device in this embodiment includes N wire-wrapped screen tubes 11.
The tail liquid filtering device comprises N filament-winding sieve tubes 11, each filament-winding sieve tube 11 is vertically inserted into a corresponding filtering zone, the insertion of the filament-winding sieve tube 11 automatically forms the filtering zone without separation of other components, each filament-winding sieve tube 11 is connected with one liquid outlet 3, as shown in the figure, the filament-winding sieve tube 11 consists of supporting ribs 11-1, V-shaped wires 11-2 wound on the supporting ribs 11-1, end plates 11-3 fixed on the tops of the supporting ribs 11-1 and clamping plates 11-4 fixed on the bottoms of the supporting ribs 11-1, gaps between the V-shaped wires 11-2 are used for filtering, preferably, the supporting ribs 11-1 and the V-shaped wires 11-2 are made of stainless steel,
specifically, in the embodiment, the tower body diameter of the large-diameter dense fixed bed adsorption tower is 6m, the height of the straight section is 7m, and the height of the resin bed layer is 5m. As shown in the figure, the tail liquid filtering device comprises 12 wire-wrapped sieve tubes 11, the height of each wire-wrapped sieve tube 11 is 1100mm, the outer diameter of each wire-wrapped sieve tube 11 is 280mm, the 12 wire-wrapped sieve tubes 11 are arranged on the lower end socket of the adsorption tower body in two circles, the distribution diameter of the outer large circle is 4100mm, the distribution diameter of the 8 liquid outlets 3 is evenly distributed in the middle, the distribution diameter of the inner circle is 1850mm, and the distribution diameter of the 4 liquid outlets 3 is evenly distributed in the middle. The V-shaped wire 11-2 is a V-shaped stainless steel wire, the supporting ribs 11-1 are stainless steel supporting ribs, the section of the V-shaped stainless steel wire is 2mm wide and 3mm high, and the gap between the V-shaped stainless steel wires is 0.25mm.
Example 3
The large diameter dense fixed bed adsorption columns as in examples 1-2 operate as follows:
the adsorption stock solution is introduced into the adsorption tower body 1 through the liquid distributor 2, the liquid distribution mode is at a position close to the top of the resin bed, the liquid flow speed is small and uniform, and large interference to the resin bed can not be generated. After adsorption of the resin bed, the resin is filtered out by the tail liquid filtering device, and the tail liquid of each filtering partition enters the corresponding liquid outlet tail pipe 4 respectively, then is collected into the liquid outlet main pipe 6 and is discharged out of the adsorption tower body 1 through the adsorption tail liquid outlet 8.
The unevenness of the internal flow field of the resin bed layer can be reflected on the metal concentration of the adsorption tail liquid, and the condition of the internal flow field of the resin bed layer corresponding to each liquid outlet 3 can be known by analyzing the metal concentration of the tail liquid discharged from each liquid outlet 3. The sampling port 7 is used for sampling, the metal concentration of the tail liquid discharged from each liquid outlet 3 is detected and compared with the metal concentration of the tail liquid discharged from the liquid outlet main pipe 6, and the flow of each liquid outlet 3 is regulated, so that the regulation and control of the flow field inside the resin bed layer are realized.
For example, when the concentration of the metal in the tail liquid discharged from a certain liquid outlet 3 is higher or lower than that of the metal in the tail liquid of the liquid outlet main pipe 6 by 15%, the flow field of the liquid outlet 3 corresponding to the resin bed area is considered to be abnormal, at this time, the flow of the liquid outlet 3 is changed by the adjusting valve 5, so as to achieve the effect of improving the flow field in the corresponding resin bed area, specifically, when the concentration of the metal in the tail liquid discharged from a certain liquid outlet 3 is higher than that of the metal in the tail liquid of the liquid outlet main pipe 6 by 15%, the flow of the liquid outlet 3 is adjusted by the adjusting valve 5, so that the flow is reduced by 10%, and when the flow of the metal in the tail liquid is lower than that of the metal in the tail liquid outlet main pipe 6 by 15%, the flow of the liquid outlet 3 is adjusted by the adjusting valve 5, so that the flow of the metal in the liquid outlet 3 is increased by 10%. After 1 hour of adjustment, the metal concentration was measured by sampling again, and whether or not the adsorption normal state was reached was analyzed. And if the adsorption normal state is not reached, regulating and controlling the flow of the liquid outlet 3 again according to the result of measuring the metal concentration until the adsorption normal state is reached.
For example, the treatment capacity of the large-diameter compact fixed bed adsorption tower is 850m 3 And (3) after adsorption is started, sampling the adsorption tail liquid outlet 8 once every day to analyze the metal concentration, when the metal concentration reaches 0.4mg/L, sampling and analyzing the metal concentration from 12 sampling ports 7 and the adsorption tail liquid outlet 8 respectively every 6 hours, when the metal concentration of the liquid discharged from one sampling port 7 is higher or lower than the metal concentration of the liquid discharged from the adsorption tail liquid outlet 8 by 15%, regulating and controlling the flow of the liquid discharging branch pipe by adjusting the opening of a corresponding regulating valve of the sampling port, wherein the flow is reduced by 10% when the metal concentration is higher, and the flow is increased by 10% when the metal concentration is lower. And (3) after 1 hour of adjustment, sampling again, analyzing whether the deviation of the metal concentration is reduced to be within 15%, and if the deviation is still greater than 15%, regulating and controlling the flow of the tail liquid branch pipe with the deviation according to the result of measuring the metal concentration again until the deviation is reduced to be within 15%.
The foregoing is merely a preferred embodiment of the present invention and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present invention, which are intended to be comprehended within the scope of the present invention.
Claims (9)
1. The utility model provides a dense fixed bed adsorption tower of major diameter, its characterized in that includes the adsorption tower body, the inside top of adsorption tower body is equipped with the cloth liquid ware in order to let in the absorption stoste, the inside resin bed that is equipped with of adsorption tower body, the interior bottom space of adsorption tower body is separated into N by tail liquid filter equipment and is filtered the subregion, tail liquid filter equipment is used for separating the resin, the bottom of each filtration subregion is equipped with a liquid outlet in order to discharge the tail liquid after separating the resin, the bottom of each liquid outlet is connected with a liquid tail pipe, set up the governing valve on each liquid tail pipe in order to regulate and control the liquid flow of this liquid tail pipe, the bottom export of N liquid tail pipes all is connected to the play liquid house steward, all is equipped with the sample connection on each liquid tail pipe, set up the sample valve on the sample connection, the export of play liquid house steward is absorption tail liquid export;
the tail liquid filtering device comprises a strip slit sieve plate and partition plates, a gap exists between the strip slit sieve plate and the lower end socket of the adsorption tower, and the partition plates are arranged in the gap to form N filtering partitions at intervals.
2. The large-diameter dense fixed bed adsorption tower according to claim 1, wherein the liquid distributor comprises a connecting pipe and a blind plate, the connecting pipe extends into the adsorption tower body from the upper end socket of the adsorption tower body, the upper part of the connecting pipe is communicated with the liquid inlet, the blind plate is welded at the lower part of the connecting pipe, and through holes are formed in the connecting pipe and the blind plate.
3. The large diameter dense fixed bed adsorption column of claim 1, wherein the inner bottom of the adsorption column is divided into m annular partitions from inside to outside, and then each annular partition is uniformly divided to finally form N filtering partitions.
4. The large diameter dense fixed bed adsorption column of claim 3, wherein the inner bottom of the adsorption column body is divided into an inner ring and an outer ring with the same width from inside to outside, wherein the outer ring has 8 filtering partitions, the inner ring has 4 filtering partitions, and the inner bottom of the adsorption column body is divided into 12 filtering partitions.
5. The large-diameter dense fixed bed adsorption tower according to claim 1, wherein the liquid outlet tail pipe at the lower part of the regulating valve is a transparent UPVC pipe, and each transparent UPVC pipe is provided with the sampling port.
6. The large diameter dense fixed bed adsorption tower of claim 1, wherein the top and bottom side walls of the adsorption tower body are provided with manholes, and the resin outlet is arranged at the bottommost part of the lower end enclosure of the adsorption tower body.
7. The large-diameter dense fixed bed adsorption tower according to claim 1, wherein the slotted screen plate is composed of support ribs and V-shaped wires welded on the support ribs in parallel, gaps between the V-shaped wires are used for filtering resin, the shape of the slotted screen plate is consistent with the shape of a lower end enclosure of the adsorption tower, or the slotted screen plate is conical or horizontal circular plate.
8. The flow field control method of a large diameter dense fixed bed adsorption column according to any one of claims 1 to 7, comprising the steps of:
sampling through a sampling port, detecting the tail liquid metal concentration of each liquid outlet, comparing the tail liquid metal concentration with the tail liquid metal concentration of the liquid outlet main pipe, when the tail liquid metal concentration of a certain liquid outlet is higher or lower than the tail liquid metal concentration of the liquid outlet main pipe by a percent, considering that the liquid outlet corresponds to the flow field of the resin bed zone to be abnormal, regulating a regulating valve corresponding to the liquid outlet, specifically, when the tail liquid metal concentration of a certain liquid outlet is higher than the tail liquid metal concentration of the liquid outlet main pipe by a percent, regulating the liquid outlet flow through the regulating valve to reduce the flow by 10 percent, when the tail liquid metal concentration is lower by a percent, regulating the liquid outlet flow through the regulating valve to increase the flow by 10 percent, after regulating, sampling again to determine whether the metal concentration reaches the adsorption normal state or not, and regulating the liquid outlet flow again according to the result of determining the metal concentration until the adsorption normal state is reached.
9. The flow field regulating method as claimed in claim 8, wherein a has a value in the range of 10 to 20.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311666546.6A CN117414627A (en) | 2022-10-20 | 2022-10-20 | Large-diameter compact fixed bed tail liquid filtering device and flow field regulating and controlling method |
| CN202211285155.5A CN115487541B (en) | 2022-10-20 | 2022-10-20 | Large-diameter dense fixed bed adsorption tower and flow field regulating and controlling method thereof |
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| CN202211285155.5A CN115487541B (en) | 2022-10-20 | 2022-10-20 | Large-diameter dense fixed bed adsorption tower and flow field regulating and controlling method thereof |
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| CN202311666546.6A Division CN117414627A (en) | 2022-10-20 | 2022-10-20 | Large-diameter compact fixed bed tail liquid filtering device and flow field regulating and controlling method |
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| CN115487541A CN115487541A (en) | 2022-12-20 |
| CN115487541B true CN115487541B (en) | 2023-12-26 |
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| CN202211285155.5A Active CN115487541B (en) | 2022-10-20 | 2022-10-20 | Large-diameter dense fixed bed adsorption tower and flow field regulating and controlling method thereof |
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| CN202311666546.6A Pending CN117414627A (en) | 2022-10-20 | 2022-10-20 | Large-diameter compact fixed bed tail liquid filtering device and flow field regulating and controlling method |
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| CN112287498A (en) * | 2020-10-27 | 2021-01-29 | 哈尔滨工程大学 | Numerical simulation research method for valve core opening of three-way spring valve |
| CN112546673A (en) * | 2020-12-18 | 2021-03-26 | 欧尚元(天津)有限公司 | Parallel uniform-feeding resin column system and feeding control method |
| CN214437707U (en) * | 2020-12-09 | 2021-10-22 | 鄂尔多斯市君正能源化工有限公司热电分公司 | Desulfurization island bed pressure drop control system |
| CN215559139U (en) * | 2021-07-16 | 2022-01-18 | 西安建筑科技大学 | Device for dynamically treating chromium-containing wastewater |
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2022
- 2022-10-20 CN CN202311666546.6A patent/CN117414627A/en active Pending
- 2022-10-20 CN CN202211285155.5A patent/CN115487541B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH06320143A (en) * | 1993-05-10 | 1994-11-22 | Sumitomo Heavy Ind Ltd | Activated carbon adsorbing tower and replenishment of activated carbon |
| CN201329281Y (en) * | 2008-12-24 | 2009-10-21 | 核工业北京化工冶金研究院 | Fixed bed ion exchange absorption device free of dismounting |
| CN102743927A (en) * | 2012-05-31 | 2012-10-24 | 深圳市力科气动科技有限公司 | Automatic-adjusting supersonic cyclone separator |
| CN203899397U (en) * | 2014-05-29 | 2014-10-29 | 珠海经济特区方源有限公司 | Portable liquid distributor for adsorption tower |
| CN205868287U (en) * | 2016-06-30 | 2017-01-11 | 中核第四研究设计工程有限公司 | Ion exchange equipment filteres out discharge device |
| CN108686719A (en) * | 2018-06-28 | 2018-10-23 | 中核第四研究设计工程有限公司 | Large-scale exchange column of fixed bed |
| CN112287498A (en) * | 2020-10-27 | 2021-01-29 | 哈尔滨工程大学 | Numerical simulation research method for valve core opening of three-way spring valve |
| CN214437707U (en) * | 2020-12-09 | 2021-10-22 | 鄂尔多斯市君正能源化工有限公司热电分公司 | Desulfurization island bed pressure drop control system |
| CN112546673A (en) * | 2020-12-18 | 2021-03-26 | 欧尚元(天津)有限公司 | Parallel uniform-feeding resin column system and feeding control method |
| CN215559139U (en) * | 2021-07-16 | 2022-01-18 | 西安建筑科技大学 | Device for dynamically treating chromium-containing wastewater |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115487541A (en) | 2022-12-20 |
| CN117414627A (en) | 2024-01-19 |
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