CN112844347A - Dryer regeneration gas heater system - Google Patents
Dryer regeneration gas heater system Download PDFInfo
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- CN112844347A CN112844347A CN202110111676.8A CN202110111676A CN112844347A CN 112844347 A CN112844347 A CN 112844347A CN 202110111676 A CN202110111676 A CN 202110111676A CN 112844347 A CN112844347 A CN 112844347A
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- 230000008929 regeneration Effects 0.000 title claims abstract description 32
- 238000011069 regeneration method Methods 0.000 title claims abstract description 32
- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical compound CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 claims abstract description 126
- 239000001294 propane Substances 0.000 claims abstract description 63
- 238000010438 heat treatment Methods 0.000 claims abstract description 34
- 239000000463 material Substances 0.000 claims abstract description 27
- 239000007789 gas Substances 0.000 abstract description 155
- 238000004519 manufacturing process Methods 0.000 abstract description 33
- 230000000694 effects Effects 0.000 abstract description 22
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 abstract description 10
- 229910000037 hydrogen sulfide Inorganic materials 0.000 abstract description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 10
- 239000000126 substance Substances 0.000 abstract description 9
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 description 10
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 description 10
- 238000000034 method Methods 0.000 description 9
- 238000006356 dehydrogenation reaction Methods 0.000 description 6
- HSJPMRKMPBAUAU-UHFFFAOYSA-N cerium(3+);trinitrate Chemical compound [Ce+3].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O HSJPMRKMPBAUAU-UHFFFAOYSA-N 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000005265 energy consumption Methods 0.000 description 4
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- 239000003054 catalyst Substances 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 150000001336 alkenes Chemical class 0.000 description 2
- 238000001354 calcination Methods 0.000 description 2
- 229910000420 cerium oxide Inorganic materials 0.000 description 2
- RWGFKTVRMDUZSP-UHFFFAOYSA-N cumene Chemical compound CC(C)C1=CC=CC=C1 RWGFKTVRMDUZSP-UHFFFAOYSA-N 0.000 description 2
- JRZJOMJEPLMPRA-UHFFFAOYSA-N olefin Natural products CCCCCCCC=C JRZJOMJEPLMPRA-UHFFFAOYSA-N 0.000 description 2
- BMMGVYCKOGBVEV-UHFFFAOYSA-N oxo(oxoceriooxy)cerium Chemical compound [Ce]=O.O=[Ce]=O BMMGVYCKOGBVEV-UHFFFAOYSA-N 0.000 description 2
- -1 polypropylene Polymers 0.000 description 2
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- NLHHRLWOUZZQLW-UHFFFAOYSA-N Acrylonitrile Chemical compound C=CC#N NLHHRLWOUZZQLW-UHFFFAOYSA-N 0.000 description 1
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 1
- 239000005977 Ethylene Substances 0.000 description 1
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
- GOOHAUXETOMSMM-UHFFFAOYSA-N Propylene oxide Chemical compound CC1CO1 GOOHAUXETOMSMM-UHFFFAOYSA-N 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 238000005865 alkene metathesis reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 238000004523 catalytic cracking Methods 0.000 description 1
- 239000013064 chemical raw material Substances 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 239000003915 liquefied petroleum gas Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 239000011733 molybdenum Substances 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/30—Processes for preparing, regenerating, or reactivating
- B01J20/34—Regenerating or reactivating
- B01J20/3483—Regenerating or reactivating by thermal treatment not covered by groups B01J20/3441 - B01J20/3475, e.g. by heating or cooling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/26—Drying gases or vapours
- B01D53/261—Drying gases or vapours by adsorption
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- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Organic Chemistry (AREA)
- Drying Of Gases (AREA)
Abstract
The invention discloses a dryer regenerated gas heater system, which comprises a gas source, a heat exchanger and a dryer, wherein the gas source is connected with the heat exchanger; the gas outlet of the gas source is communicated with the material inlet of the heat exchanger; a material outlet of the heat exchanger is communicated with an air inlet of the dryer; a material inlet of the heat exchanger is also provided with a propane pipeline, and propane is introduced into an air inlet of the propane pipeline; the gas outlet of the gas source is connected with a one-way valve, and the propane pipeline is also provided with the one-way valve; the invention heats the dry gas provided by the gas source through the heat exchanger, ensures the heating effect, removes substances such as water, hydrogen sulfide and the like from the heated dry gas through the drier, ensures that the subsequent production cannot be influenced, and better meets the requirements of regeneration gas quantity and temperature; a propane pipeline is arranged at the inlet of the heat exchanger, so that the production load of the PDH device at the initial start-up stage is reduced, and the PDH device can enter a stable production state more quickly; through the check valve, the flow direction of gas is better controlled, and a better heating effect is ensured.
Description
Technical Field
The invention relates to the field of heaters, in particular to a dryer regenerated gas heater system.
Background
Propylene is an important basic chemical raw material and is widely used for producing chemical products such as polypropylene, isopropyl benzene, carbonyl alcohol, propylene oxide, acrylic acid, acrylonitrile and the like. In the prior art, the process of preparing a dehydrogenation catalyst containing cerium oxide is to mix cerium nitrate, compounds of elements such as iron, potassium, molybdenum and the like and some additives together, and obtain a finished dehydrogenation catalyst after processes such as kneading, calcining and the like, wherein the cerium nitrate in the original mixture undergoes a decomposition reaction in the calcining process, and finally forms an active component cerium oxide in the dehydrogenation catalyst. Currently, propylene supply is mainly from byproducts of catalytic cracking process for producing ethylene and heavy oil by naphtha cracking. However, due to the rapid increase in the demand for propylene, the supply of propylene has become increasingly tense in recent years, and the original source of propylene has not been able to meet the demand. The production processes for expanding the propylene source include a process for producing propylene by propane dehydrogenation, an olefin interconversion process, an olefin metathesis process, a process for producing olefin by methanol, and the like, and the process for producing propylene by propane dehydrogenation is most concerned. China has abundant liquefied petroleum gas which contains a large amount of propane, and if the propane can be effectively and directly converted into propylene, the problem of insufficient propylene sources can be relieved.
A PDH (PDH) device capable of producing 45 ten thousand tons of propane in the company of China in a year by propane dehydrogenation is provided with two product gas driers D6101, and the device is mainly used for adsorbing and removing water, hydrogen sulfide and the like in reaction products and protecting equipment such as a downstream cold box and the like. In normal operation, 1 of the two driers runs on line, and 1 drier is cut out for regeneration. The regeneration medium is designed to be dry gas produced by the device, the dry gas is heated by a drier regeneration gas heater E6105, and the dry gas flows through two driers to desorb and remove water, hydrogen sulfide and the like adsorbed by a bed layer at high temperature; however, the device is in low-load operation at the initial start of the device, the self-produced dry gas quantity is insufficient, no high-pressure steam is generated, and the requirements of regeneration gas quantity and temperature cannot be met.
Based on the above situation, the present invention provides a dryer regeneration gas heater system, which can effectively solve the above problems.
Disclosure of Invention
The invention aims to provide a dryer regeneration gas heater system. The dryer regenerated gas heater system is simple in structure and convenient to use, dry gas provided by a gas source is heated through the heat exchanger, a good heating effect is guaranteed, substances such as adsorbed water and hydrogen sulfide are removed from the heated dry gas through the dryer, subsequent production is not influenced, and the requirements of regenerated gas quantity and temperature are met better; a propane pipeline is arranged at the inlet of the heat exchanger, so that the production load of the PDH device at the initial start-up stage is reduced, and the PDH device can enter a stable production state more quickly; through the one-way valve, the flow direction of the gas is better controlled, and a better heating effect is ensured; the check valve at the gas outlet of the gas source can prevent heated dry gas and propane from flowing back to the gas source to pollute the gas source; the one-way valve on the propane pipeline can prevent the leakage of the mixed gas of the dry gas and the propane.
The invention is realized by the following technical scheme:
a dryer regeneration gas heater system comprises a gas source, a heat exchanger and a dryer; the gas outlet of the gas source is communicated with the material inlet of the heat exchanger; a material outlet of the heat exchanger is communicated with an air inlet of the dryer; a material inlet of the heat exchanger is also provided with a propane pipeline, and propane is introduced into an air inlet of the propane pipeline; the gas outlet of the gas source is connected with a one-way valve, and the propane pipeline is also provided with the one-way valve.
According to the invention, the dry gas provided by the gas source is heated through the heat exchanger, so that a better heating effect is ensured, and substances such as adsorbed water, hydrogen sulfide and the like are removed from the heated dry gas through the dryer, so that the subsequent production is not influenced, and the requirements of regeneration gas quantity and temperature are better met; the propane pipeline is arranged at the inlet of the heat exchanger, so that the production load of the PDH device at the initial start-up stage is reduced, and the PDH device can enter a stable production state more quickly; through the one-way valve, the flow direction of the gas is better controlled, and a better heating effect is ensured; the check valve at the gas outlet of the gas source can prevent heated dry gas and propane from flowing back to the gas source to pollute the gas source; the check valve on the propane pipeline can prevent leakage of the mixed gas of the dry gas and the propane.
Preferably, a steam inlet pipe is connected to a heat exchange inlet of the heat exchanger, and a steam outlet pipe is connected to a heat exchange outlet of the heat exchanger; the steam inlet pipe is communicated with steam.
Preferably, the pressure of the steam introduced into the steam inlet pipe is 3-5 MpaG, and the temperature is 300-500 ℃.
Preferably, the gas provided in the gas source is dry gas, the pressure is 0.5-0.6 MpaG, and the temperature is 8-15 ℃.
Preferably, a steam source is connected to a heat exchange inlet of the heat exchanger; the pressure of the steam provided by the steam source is 0.8-1 MpaG; the one-way valve is also arranged on the air outlet of the steam source.
Preferably, the dryer further comprises a heater, a heating inlet pipe communicated with the inlet of the heater is further arranged at the air outlet of the air source, and a heating outlet pipe communicated with the air inlet of the dryer is further arranged at the outlet of the heater; the heating outlet pipe is also provided with the one-way valve; and a one-way valve is also arranged at the material outlet of the heat exchanger.
Compared with the prior art, the invention has the following advantages and beneficial effects:
the dryer regenerated gas heater system is simple in structure and convenient to use, dry gas provided by a gas source is heated through the heat exchanger, a good heating effect is guaranteed, substances such as adsorbed water and hydrogen sulfide are removed from the heated dry gas through the dryer, subsequent production is not influenced, and the requirements of regenerated gas quantity and temperature are met better; a propane pipeline is arranged at the inlet of the heat exchanger, so that the production load of the PDH device at the initial start-up stage is reduced, and the PDH device can enter a stable production state more quickly; through the one-way valve, the flow direction of the gas is better controlled, and a better heating effect is ensured; the check valve at the gas outlet of the gas source can prevent heated dry gas and propane from flowing back to the gas source to pollute the gas source; the one-way valve on the propane pipeline can prevent the leakage of the mixed gas of the dry gas and the propane.
Drawings
Fig. 1 is a schematic structural diagram of embodiment 1 of the present invention.
Fig. 2 is a schematic structural diagram of embodiment 2 of the present invention.
Fig. 3 is a schematic structural diagram of embodiment 3 of the present invention.
Fig. 4 is a schematic structural diagram of embodiment 4 of the present invention.
Detailed Description
In order that those skilled in the art will better understand the technical solutions of the present invention, the following description of the preferred embodiments of the present invention is provided in conjunction with specific examples, but it should be understood that the drawings are for illustrative purposes only and should not be construed as limiting the patent; for the purpose of better illustrating the embodiments, certain features of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted. The positional relationships depicted in the drawings are for illustrative purposes only and are not to be construed as limiting the present patent.
Example 1:
as shown in fig. 1, a dryer regeneration gas heater system includes a gas source 1, a heat exchanger 2 and a dryer 3; the gas outlet of the gas source 1 is communicated with the material inlet of the heat exchanger 2; the material outlet of the heat exchanger 2 is communicated with the air inlet of the dryer 3; a propane pipeline 21 is further arranged at the material inlet of the heat exchanger 2, and propane is introduced into the gas inlet of the propane pipeline 21; the air outlet of the air source 1 is connected with a one-way valve 4, and the propane pipeline 21 is also provided with the one-way valve 4.
According to the invention, the heat exchanger 2 is used for heating the dry gas provided by the gas source 1, so that a better heating effect is ensured, and the dryer 3 is used for removing adsorbed substances such as water and hydrogen sulfide from the heated dry gas, so that the subsequent production is not influenced, and the requirements of regeneration gas quantity and temperature are better met; the propane pipeline 21 is arranged at the inlet of the heat exchanger 2, so that the production load of the PDH device at the initial start-up stage is reduced, and the PDH device is enabled to enter a stable production state more quickly; through the one-way valve 4, the flow direction of the gas is better controlled, and a better heating effect is ensured; the one-way valve 4 at the air outlet of the air source 1 can prevent heated dry gas and propane from flowing back to the air source 1 to pollute the air source 1; the check valve 4 on the propane line 21 prevents leakage of the mixed gas of dry gas and propane.
Further, in another embodiment, a steam inlet pipe 22 is connected to a heat exchange inlet of the heat exchanger 2, and a steam outlet pipe 23 is connected to a heat exchange outlet of the heat exchanger 2; the steam inlet pipe 22 is filled with steam.
By means of the steam inlet pipe 22, the dry gas can be heated more easily and simply by using steam, and the dry gas can be heated to a desired temperature.
The steam inlet pipe 22 and the steam outlet pipe 23 are internal pipelines of a PDH device, steam condensate after heat exchange in the steam outlet pipe 23 is heated to be changed into steam, and the steam is introduced into the steam inlet pipe 22 to form circulation and reduce energy consumption.
Further, in another embodiment, the pressure of the steam introduced into the steam inlet pipe 22 is 3 to 5MpaG, and the temperature is 300 to 500 ℃.
The temperature of the steam under the pressure of 3-5 MpaG is controlled to be 300-500 ℃, and the dry gas is sufficiently heated to 230 ℃.
Further, in another embodiment, the gas provided by the gas source 1 is dry gas, the pressure is 0.5 to 0.6MpaG, and the temperature is 8 to 15 ℃.
Example 2:
as shown in fig. 2, a dryer regeneration gas heater system includes a gas source 1, a heat exchanger 2, and a dryer 3; the gas outlet of the gas source 1 is communicated with the material inlet of the heat exchanger 2; the material outlet of the heat exchanger 2 is communicated with the air inlet of the dryer 3; a propane pipeline 21 is further arranged at the material inlet of the heat exchanger 2, and propane is introduced into the gas inlet of the propane pipeline 21; the air outlet of the air source 1 is connected with a one-way valve 4, and the propane pipeline 21 is also provided with the one-way valve 4.
According to the invention, the heat exchanger 2 is used for heating the dry gas provided by the gas source 1, so that a better heating effect is ensured, and the dryer 3 is used for removing adsorbed substances such as water and hydrogen sulfide from the heated dry gas, so that the subsequent production is not influenced, and the requirements of regeneration gas quantity and temperature are better met; the propane pipeline 21 is arranged at the inlet of the heat exchanger 2, so that the production load of the PDH device at the initial start-up stage is reduced, and the PDH device is enabled to enter a stable production state more quickly; through the one-way valve 4, the flow direction of the gas is better controlled, and a better heating effect is ensured; the one-way valve 4 at the air outlet of the air source 1 can prevent heated dry gas and propane from flowing back to the air source 1 to pollute the air source 1; the check valve 4 on the propane line 21 prevents leakage of the mixed gas of dry gas and propane.
Further, in another embodiment, a steam inlet pipe 22 is connected to a heat exchange inlet of the heat exchanger 2, and a steam outlet pipe 23 is connected to a heat exchange outlet of the heat exchanger 2; the steam inlet pipe 22 is filled with steam.
By means of the steam inlet pipe 22, the dry gas can be heated more easily and simply by using steam, and the dry gas can be heated to a desired temperature.
The steam inlet pipe 22 and the steam outlet pipe 23 are internal pipelines of a PDH device, steam condensate after heat exchange in the steam outlet pipe 23 is heated to be changed into steam, and the steam is introduced into the steam inlet pipe 22 to form circulation and reduce energy consumption.
Further, in another embodiment, the pressure of the steam introduced into the steam inlet pipe 22 is 3 to 5MpaG, and the temperature is 300 to 500 ℃.
The temperature of the steam under the pressure of 3-5 MpaG is controlled to be 300-500 ℃, and the dry gas is sufficiently heated to 230 ℃.
Further, in another embodiment, the gas provided by the gas source 1 is dry gas, the pressure is 0.5 to 0.6MpaG, and the temperature is 8 to 15 ℃.
Further, in another embodiment, a steam source 5 is connected to a heat exchange inlet of the heat exchanger 2; the pressure of the steam provided by the steam source 5 is 0.8-1 MpaG; the one-way valve 4 is also arranged on the air outlet of the steam source 5.
A steam source 5 is connected to a heat exchange inlet of the heat exchanger 2, and steam provided by the steam source 5 is adopted to heat dry gas at the initial startup of the PDH device, so that the production load of the PDH device at the initial startup is reduced, and the PDH device enters a stable production state more quickly; the steam pressure provided by the steam source 5 is controlled to be 0.8-1 MpaG, which is enough to meet the requirement of the PDH device during initial operation; the check valve 4 on the air outlet of the steam source 5 can prevent steam in the steam inlet pipe 22 from leaking into the steam source 5 after the PDH device normally operates, so that the steam pressure in the steam inlet pipe 22 is reduced, the heat exchange effect is influenced, and the heat exchange efficiency is reduced.
The steam source 5 is an offboard steam main.
Example 3:
as shown in fig. 3, a dryer regeneration gas heater system includes a gas source 1, a heat exchanger 2 and a dryer 3; the gas outlet of the gas source 1 is communicated with the material inlet of the heat exchanger 2; the material outlet of the heat exchanger 2 is communicated with the air inlet of the dryer 3; a propane pipeline 21 is further arranged at the material inlet of the heat exchanger 2, and propane is introduced into the gas inlet of the propane pipeline 21; the air outlet of the air source 1 is connected with a one-way valve 4, and the propane pipeline 21 is also provided with the one-way valve 4.
According to the invention, the heat exchanger 2 is used for heating the dry gas provided by the gas source 1, so that a better heating effect is ensured, and the dryer 3 is used for removing adsorbed substances such as water and hydrogen sulfide from the heated dry gas, so that the subsequent production is not influenced, and the requirements of regeneration gas quantity and temperature are better met; the propane pipeline 21 is arranged at the inlet of the heat exchanger 2, so that the production load of the PDH device at the initial start-up stage is reduced, and the PDH device is enabled to enter a stable production state more quickly; through the one-way valve 4, the flow direction of the gas is better controlled, and a better heating effect is ensured; the one-way valve 4 at the air outlet of the air source 1 can prevent heated dry gas and propane from flowing back to the air source 1 to pollute the air source 1; the check valve 4 on the propane line 21 prevents leakage of the mixed gas of dry gas and propane.
Further, in another embodiment, a steam inlet pipe 22 is connected to a heat exchange inlet of the heat exchanger 2, and a steam outlet pipe 23 is connected to a heat exchange outlet of the heat exchanger 2; the steam inlet pipe 22 is filled with steam.
By means of the steam inlet pipe 22, the dry gas can be heated more easily and simply by using steam, and the dry gas can be heated to a desired temperature.
The steam inlet pipe 22 and the steam outlet pipe 23 are internal pipelines of a PDH device, steam condensate after heat exchange in the steam outlet pipe 23 is heated to be changed into steam, and the steam is introduced into the steam inlet pipe 22 to form circulation and reduce energy consumption.
Further, in another embodiment, the pressure of the steam introduced into the steam inlet pipe 22 is 3 to 5MpaG, and the temperature is 300 to 500 ℃.
The temperature of the steam under the pressure of 3-5 MpaG is controlled to be 300-500 ℃, and the dry gas is sufficiently heated to 230 ℃.
Further, in another embodiment, the gas provided by the gas source 1 is dry gas, the pressure is 0.5 to 0.6MpaG, and the temperature is 8 to 15 ℃.
Further, in another embodiment, a heater 6 is further included, and a heating inlet pipe 61 communicated with an inlet of the heater 6 is further provided at an air outlet of the air source 1, and a heating outlet pipe 62 communicated with an air inlet of the dryer 3 is further provided at an outlet of the heater 6; the heating outlet pipe 62 is also provided with the one-way valve 4; and a one-way valve 4 is also arranged at the material outlet of the heat exchanger 2.
The heater 6 directly provides heated dry gas for the dryer at the initial startup of the PDH device to meet the regeneration requirement, reduce the production load of the PDH device at the initial startup and enable the PDH device to enter a stable production state more quickly; the one-way valve 4 on the heating outlet pipe 62 can ensure that the dry gas heated by the heat exchanger 2 completely enters the dryer 3, thereby ensuring better regeneration effect; the one-way valve at the material outlet of the heat exchanger 2 can ensure that the dry gas heated by the heater 6 completely enters the dryer 3, thereby ensuring better regeneration effect.
Example 4:
as shown in fig. 4, a dryer regeneration gas heater system includes a gas source 1, a heat exchanger 2 and a dryer 3; the gas outlet of the gas source 1 is communicated with the material inlet of the heat exchanger 2; the material outlet of the heat exchanger 2 is communicated with the air inlet of the dryer 3; a propane pipeline 21 is further arranged at the material inlet of the heat exchanger 2, and propane is introduced into the gas inlet of the propane pipeline 21; the air outlet of the air source 1 is connected with a one-way valve 4, and the propane pipeline 21 is also provided with the one-way valve 4.
According to the invention, the heat exchanger 2 is used for heating the dry gas provided by the gas source 1, so that a better heating effect is ensured, and the dryer 3 is used for removing adsorbed substances such as water and hydrogen sulfide from the heated dry gas, so that the subsequent production is not influenced, and the requirements of regeneration gas quantity and temperature are better met; the propane pipeline 21 is arranged at the inlet of the heat exchanger 2, so that the production load of the PDH device at the initial start-up stage is reduced, and the PDH device is enabled to enter a stable production state more quickly; through the one-way valve 4, the flow direction of the gas is better controlled, and a better heating effect is ensured; the one-way valve 4 at the air outlet of the air source 1 can prevent heated dry gas and propane from flowing back to the air source 1 to pollute the air source 1; the check valve 4 on the propane line 21 prevents leakage of the mixed gas of dry gas and propane.
Further, in another embodiment, a steam inlet pipe 22 is connected to a heat exchange inlet of the heat exchanger 2, and a steam outlet pipe 23 is connected to a heat exchange outlet of the heat exchanger 2; the steam inlet pipe 22 is filled with steam.
By means of the steam inlet pipe 22, the dry gas can be heated more easily and simply by using steam, and the dry gas can be heated to a desired temperature.
The steam inlet pipe 22 and the steam outlet pipe 23 are internal pipelines of a PDH device, steam condensate after heat exchange in the steam outlet pipe 23 is heated to be changed into steam, and the steam is introduced into the steam inlet pipe 22 to form circulation and reduce energy consumption.
Further, in another embodiment, the pressure of the steam introduced into the steam inlet pipe 22 is 3 to 5MpaG, and the temperature is 300 to 500 ℃.
The temperature of the steam under the pressure of 3-5 MpaG is controlled to be 300-500 ℃, and the dry gas is sufficiently heated to 230 ℃.
Further, in another embodiment, the gas provided by the gas source 1 is dry gas, the pressure is 0.5 to 0.6MpaG, and the temperature is 8 to 15 ℃.
Further, in another embodiment, a steam source 5 is connected to a heat exchange inlet of the heat exchanger 2; the pressure of the steam provided by the steam source 5 is 0.8-1 MpaG; the one-way valve 4 is also arranged on the air outlet of the steam source 5.
A steam source 5 is connected to a heat exchange inlet of the heat exchanger 2, and steam provided by the steam source 5 is adopted to heat dry gas at the initial startup of the PDH device, so that the production load of the PDH device at the initial startup is reduced, and the PDH device enters a stable production state more quickly; the steam pressure provided by the steam source 5 is controlled to be 0.8-1 MpaG, which is enough to meet the requirement of the PDH device during initial operation; the check valve 4 on the air outlet of the steam source 5 can prevent steam in the steam inlet pipe 22 from leaking into the steam source 5 after the PDH device normally operates, so that the steam pressure in the steam inlet pipe 22 is reduced, the heat exchange effect is influenced, and the heat exchange efficiency is reduced.
The steam source 5 is an offboard steam main.
Further, in another embodiment, a heater 6 is further included, and a heating inlet pipe 61 communicated with an inlet of the heater 6 is further provided at an air outlet of the air source 1, and a heating outlet pipe 62 communicated with an air inlet of the dryer 3 is further provided at an outlet of the heater 6; the heating outlet pipe 62 is also provided with the one-way valve 4; and a one-way valve 4 is also arranged at the material outlet of the heat exchanger 2.
The heater 6 directly provides heated dry gas for the dryer at the initial startup of the PDH device to meet the regeneration requirement, reduce the production load of the PDH device at the initial startup and enable the PDH device to enter a stable production state more quickly; the one-way valve 4 on the heating outlet pipe 62 can ensure that the dry gas heated by the heat exchanger 2 completely enters the dryer 3, thereby ensuring better regeneration effect; the one-way valve at the material outlet of the heat exchanger 2 can ensure that the dry gas heated by the heater 6 completely enters the dryer 3, thereby ensuring better regeneration effect.
The dryer regeneration gas heater system of the present invention can be easily manufactured or used by those skilled in the art according to the description of the present invention and the accompanying drawings, and can produce the positive effects described in the present invention.
Unless otherwise specified, in the present invention, if there is an orientation or positional relationship indicated by terms of "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., based on the orientation or positional relationship shown in the drawings, it is only for convenience of describing the present invention and simplifying the description, rather than to indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore, the terms describing orientation or positional relationship in the present invention are for illustrative purposes only, and should not be construed as limiting the present patent, specific meanings of the above terms can be understood by those of ordinary skill in the art in light of the specific circumstances in conjunction with the accompanying drawings.
Unless expressly stated or limited otherwise, the terms "disposed," "connected," and "connected" are used broadly and encompass, for example, being fixedly connected, detachably connected, or integrally connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and all simple modifications and equivalent variations of the above embodiments according to the technical spirit of the present invention are included in the scope of the present invention.
Claims (6)
1. A dryer regeneration gas heater system, characterized by: comprises an air source (1), a heat exchanger (2) and a dryer (3); the gas outlet of the gas source (1) is communicated with the material inlet of the heat exchanger (2); a material outlet of the heat exchanger (2) is communicated with an air inlet of the dryer (3); a propane pipeline (21) is further arranged at a material inlet of the heat exchanger (2), and propane is introduced into an air inlet of the propane pipeline (21); the gas outlet of the gas source (1) is connected with a one-way valve (4), and the propane pipeline (21) is also provided with the one-way valve (4).
2. The dryer regeneration gas heater system of claim 1, wherein: a steam inlet pipe (22) is connected to a heat exchange inlet of the heat exchanger (2), and a steam outlet pipe (23) is connected to a heat exchange outlet of the heat exchanger (2); the steam inlet pipe (22) is filled with steam.
3. The dryer regeneration gas heater system of claim 2, wherein: the pressure of the steam introduced into the steam inlet pipe (22) is 3-5 MpaG, and the temperature is 300-500 ℃.
4. The dryer regeneration gas heater system of claim 1, wherein: the gas provided in the gas source (1) is dry gas, the pressure is 0.5-0.6 MpaG, and the temperature is 8-15 ℃.
5. The dryer regeneration gas heater system of claim 1, wherein: a steam source (5) is connected to a heat exchange inlet of the heat exchanger (2); the pressure of the steam provided by the steam source (5) is 0.8-1 MpaG; the one-way valve (4) is also arranged on the air outlet of the steam source (5).
6. The dryer regeneration gas heater system of claim 1, wherein: the dryer is characterized by further comprising a heater (6), a heating inlet pipe (61) communicated with an inlet of the heater (6) is further arranged at an air outlet of the air source (1), and a heating outlet pipe (62) communicated with an air inlet of the dryer (3) is further arranged at an outlet of the heater (6); the heating outlet pipe (62) is also provided with the one-way valve (4); and a one-way valve (4) is also arranged at the material outlet of the heat exchanger (2).
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| CN202110111676.8A CN112844347A (en) | 2021-01-27 | 2021-01-27 | Dryer regeneration gas heater system |
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