CN214583520U - Material level detection equipment of fluidized bed reactor - Google Patents
Material level detection equipment of fluidized bed reactor Download PDFInfo
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- CN214583520U CN214583520U CN202120354466.7U CN202120354466U CN214583520U CN 214583520 U CN214583520 U CN 214583520U CN 202120354466 U CN202120354466 U CN 202120354466U CN 214583520 U CN214583520 U CN 214583520U
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- 239000000463 material Substances 0.000 title claims abstract description 30
- 238000001514 detection method Methods 0.000 title claims abstract description 11
- 230000002285 radioactive effect Effects 0.000 claims abstract description 36
- 230000001012 protector Effects 0.000 claims abstract description 12
- 230000005855 radiation Effects 0.000 claims description 40
- 239000013078 crystal Substances 0.000 claims description 6
- 238000005192 partition Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 14
- 239000000843 powder Substances 0.000 abstract description 10
- 238000004140 cleaning Methods 0.000 abstract description 4
- 230000009286 beneficial effect Effects 0.000 abstract description 3
- 238000011010 flushing procedure Methods 0.000 abstract description 3
- 238000005054 agglomeration Methods 0.000 abstract description 2
- 230000002776 aggregation Effects 0.000 abstract description 2
- 239000011824 nuclear material Substances 0.000 description 8
- 239000012071 phase Substances 0.000 description 7
- 238000012360 testing method Methods 0.000 description 7
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 5
- 235000017491 Bambusa tulda Nutrition 0.000 description 5
- 241001330002 Bambuseae Species 0.000 description 5
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 5
- 239000011425 bamboo Substances 0.000 description 5
- 238000006116 polymerization reaction Methods 0.000 description 5
- 239000004698 Polyethylene Substances 0.000 description 4
- -1 polyethylene Polymers 0.000 description 4
- 229920000573 polyethylene Polymers 0.000 description 4
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 3
- 239000005977 Ethylene Substances 0.000 description 3
- 238000004364 calculation method Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000009826 distribution Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 description 1
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 description 1
- 238000009991 scouring Methods 0.000 description 1
- 238000010408 sweeping Methods 0.000 description 1
- 239000012808 vapor phase Substances 0.000 description 1
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Abstract
The application provides a fluidized bed reactor material level detection device, which comprises a straight cylinder section and an expansion section, wherein an expansion end is connected with the straight cylinder section and is positioned above the straight cylinder section; detectors, radioactive sources, radioactive source protectors; except for the side close to the reactor, all the other surfaces of the radioactive source are wrapped by the protector; the detector and the radioactive source are arranged on the expansion section of the fluidized bed reactor; the detector and the radioactive source are positioned on the same horizontal plane; the method is characterized in that: the number of the detectors is more than or equal to 2, and the number of the radioactive sources is more than or equal to 2; the detectors and the radioactive sources are evenly distributed on the enlarged section of the fluidized bed reactor. The beneficial effects are as follows: the detection result is accurate, frequent blockage and even agglomeration of the pressure leading port caused by high content of fine powder in the expansion section are avoided, so that the data distortion of the material level height is caused, and meanwhile, frequent back flushing and cleaning of the pressure leading port are also avoided.
Description
Technical Field
The utility model relates to a fluidized bed reactor material level check out test set, in particular to fluidized bed polyethylene apparatus for producing enlarges nuclear charge level indicator check out test set of section.
Background
The fluidized bed reactor used in the gas phase ethylene polymerization process is operated under a pressure of 2 to 3MPa, which reduces the factory investment and energy consumption compared with the high pressure ethylene polymerization process, and is widely used. The Unipol process from Univariation and the Innovene process from BP are typical representations of gas phase fluidized bed polyethylene reactors.
In the production process, the material level of the expansion section has important significance for ensuring the long-period stable operation of the device, if the material level of the expansion section is too low, the material in the reactor is insufficient to wash the expansion section, fine powder in the reactor stays on the expansion section, and the fine powder after caking slides into the straight barrel section, so that larger lump materials are formed, and finally the device is stopped. If the material level of the expanded section is too high, excessive fine powder is carried out of the reactor by the circulating gas to block a heat exchanger, even a distribution plate, so that forced shutdown is caused. Only with a proper material level height, the expansion section can have certain scouring capacity, but fine powder is not carried out of the reactor. Therefore, the accurate detection of the material level in the expansion section has important significance. However, in the existing gas phase method process, the material level height of the expansion section is measured through differential pressure calculation, the content of fine powder in the expansion section is very high, the pressure introduction port is frequently blocked and even the fine powder is caked in the pressure introduction port, so that the data of the material level height is distorted, frequent back flushing and cleaning of the pressure introduction port are required, and time and labor are wasted.
SUMMERY OF THE UTILITY MODEL
The utility model aims to avoid the weak point among the above-mentioned prior art, provide an accurate, simple and convenient, reliable expansion section material level detection method.
The purpose of the utility model can be achieved through the following measures:
the utility model provides a fluidized bed reactor material level detection device, which comprises a straight cylinder section and an expansion section, wherein the expansion end is connected with the straight cylinder section and is positioned above the straight cylinder section, the straight cylinder section and the expansion end are coaxial and have different diameters, and the radius of the expansion section is gradually increased towards the direction far away from the straight cylinder section;
still be equipped with 2 at least detectors, 2 at least radiation sources, 2 at least nuclear charge level indicators and a plurality of radiation source protectors, radiation source protector, nuclear charge level indicator are installed expand section and each nuclear charge level indicator and have a difference in height each other, the radiation source is except being close to reactor one side, all the other each sides all are wrapped up by radiation source protector, the detector with the radiation source install in expand on the section, detector and radiation source are in on same horizontal plane and detector and radiation source evenly distributed expand on the section at fluidized bed reactor, and each nuclear charge level indicator evenly distributed is expanding section 1/n, 2/n, … …, (n-1)/n high department, n shows expand the section in the share of direction of height partition.
In one embodiment, there are two nuclear level gauges, which are disposed at 1/3 and 2/3 of the height of the enlarged section (1).
In one embodiment, the detector is a rod-type radiation source or a point-type detector, and the radiation source is a rod-type radiation source or a point-type radiation source.
In one embodiment, the detector and the radiation source are configured as a rod-type radiation source and a point-type detector or a point-type radiation source and a rod-type detector or a rod-type radiation source and a rod-type detector or a point-type radiation source and a point-type detector.
In one embodiment, the detector types may be ionization chamber type, geiger counter tube type, and scintillation crystal plus photomultiplier tube type.
In one embodiment, the detector and the radiation source are in the form of a point radiation source and a point detector, wherein the point detector is a scintillation crystal plus photomultiplier tube.
The beneficial effects of the utility model reside in that the testing result is accurate, has avoided frequent sweeping and clearance to drawing the pressure port in the pressure differential method on the former process units.
The utility model is suitable for a gas phase fluidized bed polymerization process, including ethylene polymerization and propylene polymerization.
Drawings
Fig. 1 is a schematic structural diagram of the fluidized bed reactor material level detection device of the present invention.
Wherein 1, a straight cylinder section; 2. an expansion section; 3. a first radiation source; 4. a second radiation source; 5. a first detector; 6. a second detector.
Detailed Description
The detailed description and technical contents related to the present invention are described below with reference to the accompanying drawings: the invention will be further described with reference to the following drawings and examples: the following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
The application provides a fluidized bed reactor material level check out test set, material level check out test set includes a straight section of thick bamboo, enlarges section 2, nuclear charge level indicator (not drawn in the picture), 2 at least detectors and 2 at least radiation sources, enlarge the end with straight section of thick bamboo is connected and is located straight section of thick bamboo top, straight section of thick bamboo with enlarge the coaxial reducing of end, enlarge the radius of section 2 and to keeping away from the direction crescent of straight section of thick bamboo; the detector and the radioactive source are arranged on the expanding section 2, the detector and the radioactive source are positioned on the same horizontal plane, and the detector and the radioactive source are evenly distributed on the expanding section 2 of the fluidized bed reactor. The detector is a rod-type radioactive source or a point-type detector, and the radioactive source is a rod-type radioactive source or a point-type radioactive source.
The radioactive source protector and the nuclear material level meters are arranged on the expanding section, a height difference exists between the nuclear material level meters, the radioactive source is close to one side of the reactor, other surfaces are wrapped by the radioactive source protector, the detector and the radioactive source are arranged on the expanding section, the detector and the radioactive source are positioned on the same horizontal plane, the detector and the radioactive source are evenly distributed on the expanding section of the fluidized bed reactor, the nuclear material level meters are evenly distributed on the expanding section 1/n, 2/n, … …, (n-1)/n height, and n represents the number of parts of the expanding section which are evenly distributed in the height direction.
The structural forms of the detector and the radioactive source are a rod-shaped radioactive source and a point-type detector or a point-shaped radioactive source and a rod-shaped detector or a rod-shaped radioactive source and a rod-shaped detector or a point-shaped radioactive source and a point-type detector, namely the structural forms of the detector and the radioactive source have the combination mode of the 4.
The detector can be of the ionization chamber type, the Geiger counter tube type and the scintillation crystal plus photomultiplier type.
In some embodiments, the structure of the detector and the radiation source is preferably point radiation source and point detector; wherein the detector is preferably of the scintillation crystal plus photomultiplier type.
In this application, increase nuclear charge level indicator and detect the material level in expanding the section, nuclear charge level indicator detects the material level ratio and passes through the pressure differential calculation method accuracy, still can not have to block up in the pressure differential method and draw the condition of pressure port and appear.
The utility model discloses need increase 2 above nuclear charge level indicators on the not co-altitude of expansion section, charge level indicator quantity is more the charge level measurement more accurate, use under the simplest condition 2 nuclear charge level indicators can to and relevant wire and cable.
The utility model discloses a nuclear charge level indicator's mounting height, the best distribution mode be evenly distributed on expanding section height, namely 1/n, 2/n, … …, (n-1)/n department, if use 3 charge level indicators, mountable at 1/3, 2/3 and 3/3 of expanding section height, detector and radiation source are installed on fluidized bed reactor expands the section; the detector and the radioactive source are on the same horizontal plane.
The nuclear material level of the utility model comprises a detector, a radioactive source and a radioactive source protector, wherein the radioactive source protector is wrapped outside the radioactive source; wherein the radioactive source can be Co-60, Cs-137.
The invention will be further described with reference to the drawings and specific examples.
1 nuclear level gauge was installed at 1/3 and 2/3 each of the heights of the expanded section (1) of the gas phase reactor. In the production process, the first nuclear material level indicator detector (5) cannot detect a signal, which indicates that the material level is too low and has a caking risk, and the material level needs to be increased; if the first nuclear level indicator detector (5) detects a signal and the second nuclear level indicator detector (6) does not detect the signal, the level height is appropriate, and the existing level is maintained; if the first nuclear material level meter detector (5) and the second nuclear material level meter detector (6) detect signals, the situation that the material level is too high and the heat exchanger is blocked is shown, and the material level needs to be reduced as soon as possible.
Use vapour phase method polyethylene device as the example, implement the utility model discloses before, need blow and enlarge the section and draw the pressure port 2 times per shift, need use specialized tool clearance to draw the pressure port 1 time per month. After the utility model is implemented, only need to the nuclear material level meter periodic check can, avoided frequent blowback and cleaning process.
The utility model relates to a fluidized bed reactor material level check out test set, in particular to adopt nuclear charge level indicator check out test set of vapor phase method technology production polyethylene. The method aims at measuring the material level height of an expansion section by differential pressure calculation in the existing gas phase method process, but the content of fine powder in the expansion section is very high, a pressure leading port is frequently blocked, and even the fine powder is caked in the pressure leading port, so that the data distortion of the material level height is caused; then put forward the utility model discloses, its technical scheme is: adding a nuclear level meter in the expansion section to detect the level; the beneficial effects are as follows: the detection result is accurate, frequent blockage and even agglomeration of the pressure leading port caused by high content of fine powder in the expansion section are avoided, so that the data distortion of the material level height is caused, and meanwhile, frequent back flushing and cleaning of the pressure leading port are also avoided.
The above description is only a preferred embodiment of the present invention, and it should be noted that: to the ordinary skilled person in this technical field, can also make a plurality of improvements under the prerequisite of not deviating from the utility model, this is improved and should be regarded as the utility model discloses a scope of protection down also.
Claims (6)
1. The fluidized bed reactor material level detection equipment is characterized by comprising a straight cylinder section and an expansion section, wherein the expansion end is connected with the straight cylinder section and is positioned above the straight cylinder section, the straight cylinder section and the expansion end are coaxial and have different diameters, and the radius of the expansion section is gradually increased towards the direction far away from the straight cylinder section;
still be equipped with 2 at least detectors, 2 at least radiation sources, 2 at least nuclear charge level indicators and a plurality of radiation source protectors, radiation source protector, nuclear charge level indicator are installed expand section and each nuclear charge level indicator and have a difference in height each other, the radiation source is except being close to reactor one side, all the other each sides all are wrapped up by radiation source protector, the detector with the radiation source install in expand on the section, detector and radiation source are in on same horizontal plane just detector and radiation source evenly distributed are on fluidized bed reactor expands the section, and each nuclear charge level indicator evenly distributed is expanding section 1/n, 2/n, … …, (n-1)/n high department, n shows expand the section in the share of direction of height partition.
2. Fluidized bed reactor level detection apparatus according to claim 1, characterized in that the nuclear level gauges are provided in two, which are provided at 1/3 and 2/3 of the height of the expanded section (1).
3. The fluidized bed reactor level detecting apparatus as claimed in claim 1, wherein the detector is a rod-type radioactive source or a point-type detector, and the radioactive source is a rod-type radioactive source or a point-type radioactive source.
4. Fluidized bed reactor level sensing apparatus in accordance with claim 3, wherein the detector and the radiation source are configured in the form of a rod-type radiation source and a point-type detector or a point-type radiation source and a rod-type detector or a rod-type radiation source and a rod-type detector or a point-type radiation source and a point-type detector.
5. Fluidized bed reactor level sensing apparatus according to claim 4, characterized in that the detector types can be ionization chamber type, Geiger counter tube type and scintillation crystal plus photomultiplier type.
6. The fluidized bed reactor level sensing apparatus as claimed in claim 5, wherein if the detector and the radiation source are in the form of a point type radiation source and a point type detector, wherein the point type detector is a scintillation crystal and photomultiplier type.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120354466.7U CN214583520U (en) | 2021-02-03 | 2021-02-03 | Material level detection equipment of fluidized bed reactor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120354466.7U CN214583520U (en) | 2021-02-03 | 2021-02-03 | Material level detection equipment of fluidized bed reactor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214583520U true CN214583520U (en) | 2021-11-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120354466.7U Active CN214583520U (en) | 2021-02-03 | 2021-02-03 | Material level detection equipment of fluidized bed reactor |
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| Country | Link |
|---|---|
| CN (1) | CN214583520U (en) |
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2021
- 2021-02-03 CN CN202120354466.7U patent/CN214583520U/en active Active
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