CN210631905U - Naphthalene-containing tail gas recovery system with anti-blocking function - Google Patents
Naphthalene-containing tail gas recovery system with anti-blocking function Download PDFInfo
- Publication number
- CN210631905U CN210631905U CN201920895485.3U CN201920895485U CN210631905U CN 210631905 U CN210631905 U CN 210631905U CN 201920895485 U CN201920895485 U CN 201920895485U CN 210631905 U CN210631905 U CN 210631905U
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- CN
- China
- Prior art keywords
- pipe
- gas collecting
- collecting pipe
- ammonia water
- naphthalene
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- UFWIBTONFRDIAS-UHFFFAOYSA-N Naphthalene Chemical compound C1=CC=CC2=CC=CC=C21 UFWIBTONFRDIAS-UHFFFAOYSA-N 0.000 title claims abstract description 88
- 238000011084 recovery Methods 0.000 title claims abstract description 14
- 239000007788 liquid Substances 0.000 claims abstract description 27
- 238000005406 washing Methods 0.000 claims abstract description 4
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 claims description 76
- 235000011114 ammonium hydroxide Nutrition 0.000 claims description 76
- 239000000571 coke Substances 0.000 claims description 14
- 238000002425 crystallisation Methods 0.000 abstract description 5
- 230000008025 crystallization Effects 0.000 abstract description 5
- 239000007789 gas Substances 0.000 description 85
- QGZKDVFQNNGYKY-UHFFFAOYSA-N ammonia Natural products N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 15
- 238000000034 method Methods 0.000 description 6
- 238000010438 heat treatment Methods 0.000 description 5
- 238000005352 clarification Methods 0.000 description 3
- 238000004939 coking Methods 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 3
- 230000008014 freezing Effects 0.000 description 3
- 238000007710 freezing Methods 0.000 description 3
- 239000012535 impurity Substances 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- 241000521257 Hydrops Species 0.000 description 2
- 206010030113 Oedema Diseases 0.000 description 2
- 229910021529 ammonia Inorganic materials 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 238000003912 environmental pollution Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000004321 preservation Methods 0.000 description 2
- 239000002918 waste heat Substances 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 210000005056 cell body Anatomy 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000013020 steam cleaning Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
The utility model discloses a contain naphthalene tail gas recovery system with prevent blockking up function, it includes gas collecting pipeline and constant temperature medium source, gas collecting pipeline includes main collecting pipe and a plurality of collecting pipe, main collecting pipe and a collecting pipe are the jacket pipe, the jacket pipe includes inner tube and outer tube, and the outer tube suit is in the outside of inner tube and departs from mutually with the inner tube, and the inner tube of main collecting pipe passes through the draught fan and is connected with washing system, and tail gas is retrieved to a collecting pipe's inner tube head termination, and the tail end is connected with the inner tube of main collecting pipe, and main collecting pipe and the head end of each collecting pipe's outer tube connect the feed pipe of constant temperature medium source, and the tail end of each collecting pipe connects the outer tube of main collecting pipe, and the outer tube tail end of main collecting pipe connects the liquid return pipe of constant temperature medium source. The system collects the naphthalene-containing tail gas by using the inner pipe of the jacketed pipe, and directly heats the inner pipe by using a constant-temperature medium in the outer pipe, so that crystallization of naphthalene is avoided. The system solves the problem of blockage of the naphthalene-containing tail gas pipeline and can ensure the normal operation of the tail gas treatment system.
Description
Technical Field
The utility model relates to a can prevent tail gas collecting system of naphthalene jam that uses at coke-oven plant cold drum workshop section belongs to coke production facility technical field.
Background
The main tasks of the cold drum section of the coke-oven plant are to cool coke oven gas, remove impurities such as tar, naphthalene and the like in the gas, separate a tar and ammonia water mixture and provide circulating ammonia water for the coke oven to cool raw coke oven gas.
The process of the cold drum section of the coking plant is complex, a mechanized tar ammonia water clarifying tank, a circulating ammonia water tank, a residual ammonia water tank, a tar intermediate tank, a primary cooler upper and lower section circulating tank, a submerged tank, a machine front water seal and the like are distributed, the medium in the tanks is a tar ammonia water mixture, the volatile unorganized diffused tail gas needs to be intensively treated, and the traditional treatment method is that the diffused gas in each tank is collected through a gas collecting pipe additionally provided with a heat insulation layer and pumped to a tail gas cleaning tower by an induced draft fan for treatment. Because the diffused gas contains a large amount of naphthalene, the naphthalene is easy to crystallize at normal temperature, so that the gas collecting pipeline is frequently blocked, particularly in winter in the north, the blocking frequency is higher, the normal operation of a tail gas treatment system is seriously influenced, the blockage of the gas collecting pipeline is usually treated by adopting a steam cleaning method, the workload is large, the generated waste liquid is large, and the working environment is polluted by the overflowing of the on-site naphthalene crystallization.
The publication number is CN208138681U chinese patent and provides a heating device who contains naphthalene tail gas recovery pipeline jam, the device leads to the abluent mode of aqueous ammonia to handle the naphthalene jam with interior sleeve pipe through the spiral pipe heating, because what the inner tube adopted of spiral pipe is the indirect heating mode, its heating effect is relatively poor, the inner tube temperature that leads to tail gas is still lower, naphthalene still can the crystallization block up the pipeline, adopt the aqueous ammonia to wash the pipeline not only can increase work load, still can persist the hydrops at the tail gas pipeline low point simultaneously, tail gas pipeline can be blockked up to these hydrops, influence tail gas is carried. In a word, the existing methods can not effectively prevent the naphthalene-containing tail gas collecting pipeline from being blocked, and how to fundamentally solve the problem of naphthalene blockage is always a difficult problem for related technicians.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to the drawback of prior art, provide a contain naphthalene tail gas recovery system with prevent blockking up function to thoroughly solve the jam problem that contains naphthalene tail gas collecting pipe, guarantee tail gas treatment system normal operating.
The problem of the utility model is realized with following technical scheme:
the utility model provides a contain naphthalene tail gas recovery system with prevent blockking up function, includes gas collecting pipeline and constant temperature medium source in the constitution, gas collecting pipeline includes main gas collecting pipe and a plurality of branch collecting pipe, main gas collecting pipe and branch collecting pipe are the jacket pipe, the jacket pipe includes inner tube and outer tube, the coaxial suit of outer tube is in the outside of inner tube and with the inner tube looks separation, the inner tube of main gas collecting pipe passes through the draught fan and is connected with washing system, the tail gas is retrieved to the head end of the inner tube of every branch collecting pipe, the tail end is connected with the inner tube of main gas collecting pipe, the head end of the outer tube of main gas collecting pipe and each branch collecting pipe connects the feed pipe of constant temperature medium source, the tail end of the outer tube of each branch collecting pipe connects the outer tube of main gas collecting pipe, the tail end of the outer tube of main gas.
The aforesaid contains naphthalene tail gas recovery system with prevent blockking up function, the constant temperature medium source includes circulation ammonia water groove, circulation ammonia water pump and mechanized tar aqueous ammonia clarification tank, circulation ammonia water pump's inlet connects the leakage fluid dram of circulation ammonia water groove, and the liquid outlet passes through the constant temperature medium interface connection of feed pipe and main collecting pipe and the outer tube head end of branch collecting pipe and provides the aqueous ammonia to the coke oven through circulation ammonia pipe, the inlet of mechanized tar aqueous ammonia clarification tank receives the tar aqueous ammonia condensate that comes from the coke oven through the liquid return pipe and is connected with the constant temperature medium exit linkage of the outer tube tail end of main collecting pipe, and the liquid outlet of mechanized tar aqueous ammonia clarification tank connects the inlet of circulation ammonia water groove.
According to the naphthalene-containing tail gas recovery system with the anti-blocking function, the outer parts of the outer pipes of the main gas collecting pipe and the branch gas collecting pipes are respectively provided with the heat insulating layer.
In the naphthalene-containing tail gas recovery system with the anti-blocking function, the liquid supply pipe connected with the constant-temperature medium interface of the outer pipe of the main gas collecting pipe and the branch gas collecting pipe is a heat preservation pipe.
The utility model discloses utilize jacketed pipe's inner tube to collect the naphthalene-containing tail gas that each cell body of coke-oven plant cold drum workshop section was diffused, utilize the constant temperature medium in the outer tube to give inner tube direct heating, make contain naphthalene tail gas and keep higher temperature throughout to the crystallization of naphthalene in the tail gas has effectively been avoided. The system thoroughly solves the problem of blockage of the naphthalene-containing tail gas collecting pipeline, and can ensure the normal operation of the tail gas treatment system.
The utility model discloses use the present circulation aqueous ammonia of coke-oven plant self as the constant temperature medium, make the aqueous ammonia waste heat obtain make full use of, this system need not steam heat tracing or electric heat tracing, and not only the energy saving has avoided the environmental pollution that the cleaning tube caused moreover, and the waste of manpower and material resources has been avoided to the work load greatly reduced of maintaining simultaneously.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Fig. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic cross-sectional view of a jacketed pipe;
labeled as: 1. the device comprises a main gas collecting pipe, 2, a branch gas collecting pipe, 3, a constant-temperature medium interface, 4, an induced draft fan, 5, a diffusing tank, 6, a circulating ammonia water tank, 7, a circulating ammonia water pump, 8, a circulating ammonia water pipe, 9, a liquid supply pipe, 10, a liquid return pipe, 11, a mechanical tar ammonia water clarifying tank, 12, a heat preservation layer, 13, an outer pipe, 14, an inner pipe, 15, an ammonia water pipe, 16 and a constant-temperature medium outlet.
Detailed Description
The utility model provides a contain naphthalene tail gas recovery system with prevent blockking up function, this system can thoroughly avoid naphthalene to block up the gas collecting pipeline in coking cold drum workshop section tail gas collecting process, guarantees tail gas processing system normal operating.
The utility model discloses a theory of operation: as naphthalene in the tail gas is doped with other impurities, the freezing point of the naphthalene is lower than the freezing point of pure naphthalene of 80 ℃, actually about 75-77 ℃, so that the naphthalene in the tail gas does not generate crystallization as long as the environmental temperature reaches 75-77 ℃, the temperature of coking circulating ammonia water is generally 77-78 ℃, the circulating ammonia water is adopted to directly heat and preserve the temperature of the tail gas pipeline containing the naphthalene, and the tail gas pipeline can be prevented from being blocked after the naphthalene is crystallized.
Referring to fig. 1, the utility model mainly comprises a jacketed gas collecting pipeline and a constant temperature medium source;
the jacketed gas collecting pipeline comprises a main gas collecting pipe 1 and a branch gas collecting pipe 2, the main gas collecting pipe 1 and the branch gas collecting pipe 2 are the same in structure and are jacketed pipes formed by an inner pipe 14 and an outer pipe 13, the outer pipe 13 is sleeved outside the inner pipe 14 and provided with a constant-temperature medium interface 3, the inner pipe 14 and the outer pipe 13 are independent channels and are not communicated with each other, naphthalene-containing tail gas is introduced into the inner pipe 14, hot ammonia water is introduced into the outer pipe 13, so that the hot ammonia water in the outer pipe 13 can heat and preserve the naphthalene-containing tail gas in the inner pipe 14 constantly, and the phenomenon that the pipeline is blocked by naphthalene crystals is avoided.
The constant temperature medium source comprises a circulating ammonia water tank 6, a circulating ammonia water pump 7, a circulating ammonia water pipe 8 and a liquid supply pipe 9, a liquid return pipe 10, a mechanized tar ammonia water clarifying tank 11, an ammonia water pipe 15, a circulating ammonia water pump 7 with one end connected with a circulating ammonia water tank 6 and the other end connected with a circulating ammonia water pipe 8 for providing ammonia water for a coke oven (not shown in the figure), a liquid supply pipe 9 with one end connected with the circulating ammonia water pipe 8 and the other end connected with the constant temperature medium interface 3 of the main gas collecting pipe 1 and each branch gas collecting pipe 2 for providing a constant temperature heat source for the gas collecting pipe, one end of the liquid return pipe 10 connected with the constant temperature medium outlet 16 of the main gas collecting pipe 1 and the other end connected with the mechanized tar ammonia water clarifying tank 11, so that the heat-exchanged hot ammonia water and tar ammonia water condensate from the coke oven flow into the mechanized tar ammonia water clarifying tank 11 together, and the ammonia water pipe 15 connects the mechanized tar ammonia water clarifying tank 11 with the circulating ammonia water tank 6 to ensure that the hot ammonia water separated from the mechanized tar ammonia.
Fig. 2 shows that the outer tubes 13 of the main gas collecting pipe 1 and the branch gas collecting pipes 2 are wrapped with insulating layers 12.
The utility model discloses a working process does:
the inner pipe of each branch gas collecting pipe collects the tail gas of each tail gas collecting point in the main gas collecting pipe, and the inner pipe of the main gas collecting pipe is connected with the induced draft fan to discharge the tail gas into the washing system. The hot circulating ammonia water is sent to a coke oven from a circulating ammonia water tank 6 through a circulating ammonia water pump 7 through a circulating ammonia water pipe 8 to spray cooled raw coke oven gas, a part of hot ammonia water is led out from the circulating ammonia water pipe 8 by a liquid supply pipe 9 and sent to a main gas collecting pipe 1 and a constant temperature medium interface 3 of an outer pipe of each branch gas collecting pipe 2, the hot ammonia water flows through an outer pipe 13 of each gas collecting pipe, finally, the hot ammonia water is discharged to a mechanized tar ammonia water clarifying tank 11 through a constant temperature medium outlet 16 at the tail end of the outer pipe of the main gas collecting pipe 1 and a liquid return pipe 10, in the mechanized tar ammonia water clarifying tank 11, the ammonia water reflowed by the liquid return pipe 10 is mixed with a large amount of tar ammonia water mixture from the coke oven, tar and the ammonia water are settled and separated, and the ammonia water at. When the coke oven is continuously and stably produced, the temperature of the ammonia water in the circulating ammonia water tank 6 can be ensured to be stabilized at 77-78 ℃, so that the temperature of the outer pipe 13 is kept at 77-78 ℃, the outer pipe 13 continuously heats the inner pipe 14, the temperature of the inner pipe is stabilized at 75-77 ℃, and the temperature is higher than the freezing point of naphthalene containing impurities, so that the naphthalene-containing tail gas cannot be condensed in a gas collecting pipeline, and the phenomenon that the naphthalene blocks the tail gas collecting pipeline is avoided.
The utility model solves the problem of frequent blockage of the tail gas collecting pipe in the cold drum working section, overcomes the environmental shutdown of the cold drum working section caused by the blockage of the tail gas collecting pipe, and ensures the normal operation of the cold drum environmental protection facility; the utility model discloses use the present circulation aqueous ammonia of coke-oven plant self as the heat source, the aqueous ammonia waste heat obtains utilizing, need not steam tracing or electric tracing, and the energy saving has avoided steam to clean environmental pollution and the waste liquid treatment that brings simultaneously, and maintenance work volume greatly reduced uses manpower sparingly material resources.
Claims (4)
1. A naphthalene-containing tail gas recovery system with an anti-blocking function is characterized by comprising a gas collecting pipeline and a constant-temperature medium source, wherein the gas collecting pipeline comprises a main gas collecting pipe (1) and a plurality of branch gas collecting pipes (2), the main gas collecting pipe (1) and the branch gas collecting pipes (2) are clamping sleeves, each clamping sleeve comprises an inner pipe (14) and an outer pipe (13), the outer pipes (13) are coaxially sleeved outside the inner pipes (14) and are separated from the inner pipes (14), the inner pipes (14) of the main gas collecting pipe (1) are connected with a washing system through draught fans (4), the head end of the inner pipe (14) of each branch gas collecting pipe (2) is connected with the tail gas to be recovered, the tail end of each branch gas collecting pipe is connected with the inner pipe (14) of the main gas collecting pipe (1), the head ends of the outer pipes (13) of the main gas collecting pipe (1) and each branch gas collecting pipe (2) are connected with a liquid supply pipe (9) of the constant-temperature medium source outer pipe, and the tail end of each branch gas collecting pipe (, the tail end of the outer pipe (13) of the main gas collecting pipe (1) is connected with a liquid return pipe (10) of a constant temperature medium source.
2. The naphthalene-containing tail gas recovery system with anti-clogging function according to claim 1, the constant temperature medium source comprises a circulating ammonia water tank (6), a circulating ammonia water pump (7) and a mechanized tar ammonia water clarifying tank (11), a liquid inlet of the circulating ammonia water pump (7) is connected with a liquid outlet of a circulating ammonia water tank (6), a liquid outlet is connected with a constant temperature medium interface (3) at the head ends of the main gas collecting pipe (1) and the outer pipe (13) of the branch gas collecting pipe (2) through a liquid supply pipe (9) and provides ammonia water for the coke oven through a circulating ammonia water pipe (8), the liquid inlet of the mechanical tar ammonia water clarifying tank (11) receives tar ammonia water condensate from the coke oven through a liquid return pipe (10) and is connected with a constant temperature medium outlet (16) at the tail end of an outer pipe (13) of the main gas collecting pipe (1), and the liquid outlet of the mechanical tar ammonia water clarifying tank (11) is connected with the liquid inlet of the circulating ammonia water tank (6).
3. The naphthalene-containing tail gas recovery system with the anti-clogging function according to claim 1 or 2, wherein the main gas collecting pipe (1) and the branch gas collecting pipe (2) are provided with an insulating layer (12) on the outer portion of the outer pipe (13).
4. The naphthalene-containing tail gas recovery system with the anti-clogging function according to claim 3, wherein the liquid supply pipe (9) connected to the thermostatic medium port (3) of the outer pipe (13) of the main gas collecting pipe (1) and the branch gas collecting pipe (2) is a heat-insulating pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920895485.3U CN210631905U (en) | 2019-06-14 | 2019-06-14 | Naphthalene-containing tail gas recovery system with anti-blocking function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920895485.3U CN210631905U (en) | 2019-06-14 | 2019-06-14 | Naphthalene-containing tail gas recovery system with anti-blocking function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210631905U true CN210631905U (en) | 2020-05-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920895485.3U Expired - Fee Related CN210631905U (en) | 2019-06-14 | 2019-06-14 | Naphthalene-containing tail gas recovery system with anti-blocking function |
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| CN (1) | CN210631905U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111905682A (en) * | 2020-08-18 | 2020-11-10 | 萍乡市利升科技有限公司 | Oxidation tower and molten salt method continuous oxidation process for producing potassium permanganate by using same |
-
2019
- 2019-06-14 CN CN201920895485.3U patent/CN210631905U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111905682A (en) * | 2020-08-18 | 2020-11-10 | 萍乡市利升科技有限公司 | Oxidation tower and molten salt method continuous oxidation process for producing potassium permanganate by using same |
| CN111905682B (en) * | 2020-08-18 | 2022-03-25 | 萍乡市利升科技有限公司 | Oxidation tower and molten salt method continuous oxidation process for producing potassium permanganate by using same |
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200529 |