CN110760357B - A kind of preparation method and processing device of heating furnace fuel - Google Patents
A kind of preparation method and processing device of heating furnace fuel Download PDFInfo
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- CN110760357B CN110760357B CN201911145573.2A CN201911145573A CN110760357B CN 110760357 B CN110760357 B CN 110760357B CN 201911145573 A CN201911145573 A CN 201911145573A CN 110760357 B CN110760357 B CN 110760357B
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 100
- 239000000446 fuel Substances 0.000 title claims abstract description 91
- 238000012545 processing Methods 0.000 title claims abstract description 28
- 238000002360 preparation method Methods 0.000 title claims abstract description 16
- 230000003111 delayed effect Effects 0.000 claims abstract description 77
- 238000004939 coking Methods 0.000 claims abstract description 73
- 238000002156 mixing Methods 0.000 claims abstract description 32
- 238000001816 cooling Methods 0.000 claims abstract description 20
- 238000003795 desorption Methods 0.000 claims abstract description 16
- 238000006477 desulfuration reaction Methods 0.000 claims abstract description 10
- 230000023556 desulfurization Effects 0.000 claims abstract description 10
- 239000007789 gas Substances 0.000 claims description 294
- 239000003915 liquefied petroleum gas Substances 0.000 claims description 42
- 230000003009 desulfurizing effect Effects 0.000 claims description 13
- 239000006200 vaporizer Substances 0.000 claims description 12
- 238000003860 storage Methods 0.000 claims description 8
- 239000007788 liquid Substances 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 14
- 230000007613 environmental effect Effects 0.000 abstract description 2
- 238000004458 analytical method Methods 0.000 description 47
- 238000000034 method Methods 0.000 description 11
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 10
- 239000001257 hydrogen Substances 0.000 description 10
- 229910052739 hydrogen Inorganic materials 0.000 description 10
- 238000005457 optimization Methods 0.000 description 8
- 238000002485 combustion reaction Methods 0.000 description 6
- 238000001179 sorption measurement Methods 0.000 description 6
- 230000001502 supplementing effect Effects 0.000 description 6
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 4
- 238000013461 design Methods 0.000 description 4
- 238000001514 detection method Methods 0.000 description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- AKEJUJNQAAGONA-UHFFFAOYSA-N sulfur trioxide Chemical compound O=S(=O)=O AKEJUJNQAAGONA-UHFFFAOYSA-N 0.000 description 4
- 239000006227 byproduct Substances 0.000 description 3
- 238000004517 catalytic hydrocracking Methods 0.000 description 3
- 238000007599 discharging Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical compound CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 2
- 239000011280 coal tar Substances 0.000 description 2
- 238000004868 gas analysis Methods 0.000 description 2
- 229910052717 sulfur Inorganic materials 0.000 description 2
- 239000011593 sulfur Substances 0.000 description 2
- 239000013589 supplement Substances 0.000 description 2
- 230000008016 vaporization Effects 0.000 description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 1
- OTMSDBZUPAUEDD-UHFFFAOYSA-N Ethane Chemical compound CC OTMSDBZUPAUEDD-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 239000000571 coke Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000003203 everyday effect Effects 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 239000003350 kerosene Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000001294 propane Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000011269 tar Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L3/00—Gaseous fuels; Natural gas; Synthetic natural gas obtained by processes not covered by subclass C10G, C10K; Liquefied petroleum gas
- C10L3/12—Liquefied petroleum gas
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10C—WORKING-UP PITCH, ASPHALT, BITUMEN, TAR; PYROLIGNEOUS ACID
- C10C1/00—Working-up tar
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G47/00—Cracking of hydrocarbon oils, in the presence of hydrogen or hydrogen- generating compounds, to obtain lower boiling fractions
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- Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
Abstract
本发明提供了一种加热炉燃料的制备方法，加热炉燃料包括解析气及延迟焦化富气，加热炉燃料的制备方法包括以下步骤：步骤一：解析气进行第一次加压处理；步骤二：将加压后的解析气及延迟焦化富气排入一次混合气混合罐中进行混合形成第一混合气体；步骤三：将第一混合气体进行第二次加压处理及降温处理；步骤四：加压及降温后的第一混合气体脱硫处理，形成第二混合气体，即为加热炉燃料。还提供了一种加热炉燃料的处理装置，包括依次经管道连接的进气装置、一次混合气混合罐、压缩机、冷却装置、脱硫塔、加热炉燃料缓冲罐。本发明的加热炉燃料能够大幅降低加热炉燃料的使用成本，且将生产中富余的解析气及延迟焦化富气回收利用，从而达到环保的要求。
The invention provides a preparation method of heating furnace fuel. The heating furnace fuel includes desorption gas and delayed coking rich gas. The preparation method of the heating furnace fuel includes the following steps: step 1: the desorption gas is subjected to a first pressurization treatment; step 2 Step 3: The first mixed gas is subjected to a second pressurization treatment and cooling treatment; Step 4 : Desulfurization treatment of the first mixed gas after pressurization and cooling to form a second mixed gas, which is the fuel for the heating furnace. Also provided is a heating furnace fuel processing device, comprising an air inlet device, a primary mixed gas mixing tank, a compressor, a cooling device, a desulfurization tower, and a heating furnace fuel buffer tank connected in sequence through pipelines. The heating furnace fuel of the invention can greatly reduce the use cost of the heating furnace fuel, and can recycle the excess analytical gas and delayed coking rich gas in production, thereby meeting the requirements of environmental protection.
Description
Technical Field
The invention relates to the technical field of coal chemical industry energy conservation, in particular to a preparation method and a treatment device of heating furnace fuel.
Background
With the rapid growth of the development of the coal tar deep processing industry, the industrial scale is continuously intensified and scaled. In the actual production, a delayed coking-hydrocracking process is adopted to produce the deep processing process route of the coal tar, fuels for providing heat energy for the heating furnace are all liquefied petroleum gas, and the operating cost of the production is extremely high due to high fuel consumption of the heating furnace and high cost of the liquefied petroleum gas.
Therefore, it is necessary to provide a fuel for a heating furnace which can replace or partially replace liquefied petroleum gas, and to design a fuel processing device for the heating furnace to ensure the normal operation of the heating furnace.
Disclosure of Invention
The invention aims to provide a preparation method and a treatment device of heating furnace fuel, and the design idea of the heating furnace fuel is as follows: because a large amount of hydrogen is needed in the process of producing the coke kerosene by the delayed coking-hydrocracking process, the enterprise especially designs a pressure swing adsorption hydrogen production device and successfully applies the pressure swing adsorption hydrogen production device to production, and the hydrogen production process can produce surplus analysis gas, and the main components of the pressure swing adsorption hydrogen production device comprise CO2, nitrogen, methane, a small amount of hydrogen and the like. Meanwhile, in the delayed coking-hydrocracking process of the deep processing of the tar, delayed coking rich gas is generated and discharged, the main components are light hydrocarbons, and the main components comprise methane, ethane, propane, hydrogen and the like. The direct discharge of the desorbed gas and the delayed coking rich gas causes certain pollution to the environment, so that the gases of the desorbed gas and the delayed coking rich gas can be discharged after special treatment. The rich gas can be combusted due to both the decomposed gas and the delayed coking, and higher heat (namely high heat value) can be released after combustion. Therefore, the use of the solution gas and the delayed coking rich gas as fuel of the combustion furnace instead of the liquefied petroleum gas can be considered to reduce the production cost.
Because the pressure, the heat value, the temperature and the like of the analyzed gas, the delayed coking rich gas and the liquefied petroleum gas have certain differences and cannot be directly used, the invention also designs the processing device of the heating furnace fuel, and after the generated residual analyzed gas and the delayed coking rich gas are specially processed by the processing device, the heating furnace fuel mainly formed by the analyzed gas and the delayed coking rich gas can reach even higher than the heat value of the liquefied petroleum gas, and the normal work of the heating furnace is ensured.
The invention provides a preparation method of heating furnace fuel, wherein the heating furnace fuel comprises analysis gas and delayed coking rich gas, and the preparation method of the heating furnace fuel comprises the following steps:
the method comprises the following steps: carrying out first pressurization treatment on the analysis gas to ensure that the difference between the pressure of the analysis gas and the pressure of the delayed coking rich gas is less than or equal to +/-5.0 percent;
step two: respectively discharging the pressurized desorption gas and the delayed coking rich gas into a primary mixed gas mixing tank through pipelines to be mixed to form a first mixed gas;
step three: performing secondary pressurization treatment on the first mixed gas in the primary mixed gas mixing tank, and performing cooling treatment on the pressurized first mixed gas;
step four: and (4) carrying out desulfurization treatment on the first mixed gas after being cooled in the third step to form second mixed gas, outputting and storing the second mixed gas, wherein the second mixed gas is the fuel of the heating furnace.
As a further optimization of the invention, because the temperature of the analysis gas discharged by the pressure swing adsorption hydrogen production device is high, in order to avoid damage to the pressurizing device when the analysis gas is pressurized and influence the service life of the pressurizing device, in the step one, the temperature of the analysis gas is reduced before the first pressurizing treatment, the temperature of the analysis gas before the first pressurizing treatment is 20-40 ℃, and when the temperature of the analysis gas is 20-40 ℃, the analysis gas enters the pressurizing device (such as a fan described below), the heat damage to each part of the pressurizing device can not be caused.
As a further optimization of the present invention, the heating furnace fuel formed by the desorption gas and the delayed coking rich gas has a lower calorific value and may not meet the heat energy standard of the heating furnace, the heating furnace fuel further comprises liquefied petroleum gas, and the preparation method of the heating furnace fuel further comprises the fifth step of: gasifying the liquefied petroleum gas into a gas state, and adding the liquefied petroleum gas into the second mixed gas to form a third mixed gas, wherein the third mixed gas is the fuel of the heating furnace.
The invention also provides a heating furnace fuel processing device based on the heating furnace fuel preparation method, which comprises an air inlet device, a primary mixed gas mixing tank, a compressor, a cooling device, a desulfurizing tower and a heating furnace fuel buffer tank which are sequentially connected through pipelines.
The air inlet device comprises a analytic gas inlet device and a delayed coking gas-rich inlet pipeline, and the analytic gas inlet device and the delayed coking gas-rich inlet pipeline are connected in parallel and are arranged at the air inlet end of the primary mixed gas mixing tank. The analytic gas inlet device comprises a fan, and the gas inlet end of the fan is connected with an analytic gas temporary storage tank through a pipeline.
The working principle of the processing device of the heating furnace fuel is that the pressure of the analyzed gas is relatively low (about 20-30 KPa), the pressure of the delayed coking rich gas is relatively high (about 50-60 KPa), and in order to avoid potential safety hazards caused by gas streaming when the analyzed gas and the delayed coking rich gas are directly mixed, the analyzed gas needs to be pressurized, so that the pressure of the analyzed gas is equivalent to the pressure of the delayed coking rich gas (namely, about 50-60 KPa), and the operation safety of equipment is ensured. Meanwhile, the compressor pressurizes the mixed gas formed by the analysis gas and the delayed coking, so that the pressure standard of the mixed gas entering the desulfurizing tower is achieved. The desulfurizing tower removes sulfur in the mixed gas, ensures the safety of the exhaust gas after the combustion of the heating furnace, and avoids the pollution of sulfur dioxide or sulfur trioxide and other polluted gases to the atmospheric environment.
As a further improvement of the gas inlet device in the invention, in order to ensure that the pressure of the analysis gas discharged by the analysis gas inlet device is equivalent to the pressure of the delayed coking rich gas discharged by the delayed coking rich gas inlet pipeline, the analysis gas is discharged into the primary mixed gas mixing tank again to be mixed. And a first pressure measuring device is also arranged on the pipeline at the air outlet end of the fan, and a second pressure measuring device is arranged on the delayed coking gas-rich air inlet pipeline. And a first valve is also arranged on a pipeline between the first pressure measuring device and the primary mixed gas mixing tank, the first valve is an electromagnetic valve, and the first valve, the first pressure measuring device and the second pressure measuring device are respectively and electrically connected with the controller. When the pressure of the pressurized analysis gas is equal to the pressure of the delayed coking rich gas, the controller controls the first gate valve (namely the electromagnetic valve) and the valve on the delayed coking rich gas inlet pipeline to be opened, so that the pressurized analysis gas and the delayed coking rich gas are discharged into the primary mixed gas mixing tank to be mixed and temporarily stored.
As a further optimization of the air intake device in the present invention, generally, in order to reduce the loss of the fan and prolong the service life of the fan, the temperature of the gas entering the fan cannot be too high, and therefore, a first water-cooled cooler is further connected to the air intake pipeline of the desorption gas temporary storage tank, and the first water-cooled cooler is used for cooling the desorption gas to 20 to 40 ℃. For example, when the blower is a roots blower, the roots blower can operate at ambient temperatures no greater than 40 ℃, and when the gas temperature exceeds 40 ℃, the life of the roots blower can be greatly reduced.
As a further improvement of the processing device of the heating furnace fuel, when the heating furnace fuel is combusted, the temperature of the heating furnace is required to reach 425-450 ℃, the mixed gas formed by mixing the solution gas and the delayed coking rich gas is possibly not up to the heat energy standard of the heating furnace, so that the heating temperature of the heating furnace is not up to the set value, and therefore, partial liquefied petroleum gas is required to be added into the mixed gas for supplementing, so as to ensure the temperature requirement of the heating furnace. Therefore, the processing device of the heating furnace fuel also comprises a liquefied petroleum gas supplementing structure, and the liquefied petroleum gas supplementing structure and the desulfurizing tower are arranged at the air inlet end of the heating furnace fuel buffer tank in parallel.
As a further optimization of the fuel processing device of the heating furnace of the present invention, the liquefied petroleum gas supplementing structure comprises a vaporizer for vaporizing the liquefied petroleum gas from a liquid state to a gas state, and the inlet pipeline of the vaporizer is connected with a second valve, and the outlet pipeline of the vaporizer is connected with a third valve. And (3) measuring the mixed gas discharged by the desulfurizing tower, when the heat value of the mixed gas is smaller than that of the liquefied petroleum gas and cannot reach the heat energy standard of the heating furnace, adding part of the liquefied petroleum gas for supplement, opening the second valve and the third valve, introducing a certain amount of gasified liquefied petroleum gas into the fuel buffer tank of the heating furnace, mixing the gasified liquefied petroleum gas with the mixed gas to form the fuel of the heating furnace, and temporarily storing the fuel for later use.
As a further improvement of the cooling device, the cooling device comprises an air cooler, the temperature of the mixed gas in the primary mixed gas mixing tank can be increased after the mixed gas is compressed by a compressor, the temperature of the mixed gas can be reduced due to the arrangement of the air cooler, and due to the fact that the mixed gas is cooled by air, introduction of an external cold source is reduced, and the operation cost of the device is reduced.
Compared with the prior art, the beneficial effects of the invention are as follows:
1. the invention realizes the recycling of the residual desorption gas and the delayed coking rich gas by partially or completely replacing liquefied petroleum gas with the mixed gas formed by mixing the desorption gas and the delayed coking rich gas, greatly reduces the use cost of fuel, avoids energy waste and avoids the pollution to the environment caused by the desorption gas and the delayed coking rich gas evacuation.
2. And mixing the decomposed gas and the delayed coking rich gas, and pressurizing to form a first mixed gas for desulfurization treatment, so as to ensure that the discharged gas meets the environmental protection requirement after the fuel of the heating furnace is combusted.
3. The processing device of the heating furnace fuel has a simple structure, is safe and reliable, and mixes the resolved gas and the delayed coking rich gas to form the fuel which can be used for the heating furnace through the processing device, and partially or completely replaces the use of liquefied petroleum gas, thereby greatly reducing the use cost of the fuel. Through preliminary calculation, liquefied gas can be replaced by byproduct desorbed gas and delayed coking rich gas, about 20 tons of liquefied petroleum gas can be saved every day, and the cost of the liquefied petroleum gas can be saved by 3066 ten thousand yuan per year according to 4200 yuan/ton calculation.
Drawings
FIG. 1 is a flow chart of a method of making a furnace fuel according to the present invention;
FIG. 2 is a flow chart of another method of making a furnace fuel according to the present invention;
FIG. 3 is a schematic view of an inventive furnace fuel processing apparatus;
FIG. 4 is a schematic view of another inventive furnace fuel processing apparatus;
wherein, 1, an air inlet device; 2. a primary mixed gas mixing tank; 3. a compressor; 4. a cooling device; 5. a desulfurizing tower; 6. a heating furnace fuel buffer tank; 7. heating furnace; 8. a vaporizer; 9. a second valve; 10. a third valve; 11. a delayed coking rich gas inlet pipeline; 12. a fan; 13. a temporary storage tank for the analyzed gas; 14. a first water-cooled chiller; 15. a first pressure measuring device; 16. a second pressure measuring device; 17. a first valve; 41. an air cooler; 42. a second water-cooled cooler.
Detailed Description
The present invention is described in detail with reference to the embodiments shown in the drawings, but it should be understood that these embodiments are not intended to limit the present invention, and those skilled in the art should understand that functional, methodological, or structural equivalents or substitutions made by these embodiments are within the scope of the present invention.
Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit to a number of indicated technical features. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the invention, the meaning of "a plurality" is two or more unless otherwise specified.
The terms "mounted," "connected," and "coupled" are to be construed broadly and may, for example, be fixedly coupled, detachably coupled, or integrally coupled; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the creation of the present invention can be understood by those of ordinary skill in the art through specific situations.
Example 1:
referring to fig. 1, fig. 1 is a flow chart of a method for preparing a fuel for a heating furnace according to an embodiment.
In this embodiment, the furnace fuel includes a stripping gas and a delayed coking rich gas. The analysis gas is generated by a pressure swing adsorption hydrogen production device, the pressure of the analysis gas is 20-30 KPa, and the detection result of the analysis gas is shown in the following table I:
the delayed coking rich gas comes from a by-product fractionating tower overhead gas of a delayed coking device, the pressure of the delayed coking rich gas is 50-60 KPa, and the detection result of the delayed coking rich gas is shown in the following table two:
when the above-mentioned solution gas and the delayed rich gas are mixed to form the heating furnace fuel, in order to prevent the problem of high pressure and low pressure, the two gases need to be mixed until the pressures of the two gases are balanced, so as to ensure the heat value of the heating furnace fuel and the safety of the device operation.
The preparation method of the heating furnace fuel in the embodiment comprises the following steps:
the method comprises the following steps: carrying out first pressurization treatment on the analysis gas to ensure that the difference between the pressure of the analysis gas and the pressure of the delayed coking rich gas is less than or equal to +/-5.0 percent;
step two: respectively discharging the pressurized desorption gas and the delayed coking rich gas into a primary mixed gas mixing tank through pipelines to be mixed to form a first mixed gas;
step three: performing secondary pressurization treatment on the first mixed gas in the primary mixed gas mixing tank, and performing cooling treatment on the pressurized first mixed gas;
step four: and (4) carrying out desulfurization treatment on the first mixed gas after being cooled in the third step to form second mixed gas, outputting and storing the second mixed gas, wherein the second mixed gas is the fuel of the heating furnace.
The prepared heating furnace fuel contains about 2000-2500 standard of the analyzed gas and 2000-5000 standard of the delayed coking rich gas, and after combustion, the temperature of the heating furnace can be kept at 430 +/-3 ℃.
Example 2:
referring to fig. 2, fig. 2 is a flow chart of a method for preparing a fuel for a heating furnace in an embodiment.
In this embodiment, the heating furnace fuel includes a solution gas, a delayed coking rich gas, and a liquefied petroleum gas. The analysis gas is generated by a pressure swing adsorption hydrogen production device, the pressure of the analysis gas is 25-30 KPa, and the detection result of the analysis gas is shown in the following table I:
the delayed coking rich gas comes from a fractionating tower overhead gas of a delayed coking device byproduct, the pressure of the delayed coking rich gas is 55-60 KPa, and the detection result of the delayed coking rich gas is shown in the following table two:
when the above-mentioned solution gas and the delayed rich gas are mixed to form the heating furnace fuel, in order to prevent the problem of high pressure and low pressure, the two gases need to be mixed until the pressures of the two gases are balanced, so as to ensure the heat value of the heating furnace fuel and the safety of the device operation.
The preparation method of the heating furnace fuel in the embodiment comprises the following steps:
the method comprises the following steps: performing primary pressurization treatment on the analysis gas to ensure that the difference between the pressure of the analysis gas and the pressure of the delayed coking rich gas is less than or equal to +/-5.0 percent;
step two: respectively discharging the pressurized desorption gas and the delayed coking rich gas into a primary mixed gas mixing tank through pipelines to be mixed to form a first mixed gas;
step three: performing secondary pressurization treatment on the first mixed gas in the primary mixed gas mixing tank, and performing cooling treatment on the pressurized first mixed gas;
step four: and (4) carrying out desulfurization treatment on the first mixed gas after being cooled in the third step to form second mixed gas, and outputting and storing the second mixed gas.
Step five: gasifying the liquefied petroleum gas into a gas state, and adding the liquefied petroleum gas into the second mixed gas to form a third mixed gas, wherein the third mixed gas is the fuel of the heating furnace.
As shown in fig. 2, as a further optimization of the present embodiment and embodiment 1, in order to reduce the loss of the pressurizing device (fan) at the time of first pressurization and to extend the service life of the fan, the temperature of the gas entering the fan cannot be too high, and therefore in the first step, the temperature of the analysis gas is reduced so that the temperature of the analysis gas is 20 to 40 ℃.
The prepared heating furnace fuel contains about 2100-2500 standard analysis gas, 1800-5000 standard delay coking rich gas and 0.1-0.75 ton liquefied petroleum gas, and after burning, the temperature of the heating furnace can be kept at 440 +/-3 ℃.
Example 3:
in this embodiment, referring to fig. 3, the processing device for the heating furnace fuel of the above embodiments 1 and 2 is provided, and in this embodiment, the processing device includes an air intake device 1, a primary mixed gas mixing tank 2, a compressor 3, a cooling device 4, a desulfurizing tower 5, and a heating furnace fuel buffer tank 6, which are connected in sequence through a pipeline.
The gas inlet device 1 comprises a gas analysis inlet device and a delayed coking gas-rich inlet pipeline 11, and the gas analysis inlet device and the delayed coking gas-rich inlet pipeline 11 are connected in parallel and are arranged at the gas inlet end of the primary mixed gas mixing tank 2. Specifically, the analysis gas inlet device comprises a fan 12, and the inlet end of the fan 12 is connected with an analysis gas temporary storage tank 13 through a pipeline.
As shown in fig. 3, as a further optimization of the analysis gas intake device and the delayed coking gas intake line 11 of the gas intake device 1, the analysis gas is discharged into the primary gas mixture tank again to be mixed in order to ensure that the pressure of the analysis gas discharged through the analysis gas intake device is equivalent to the pressure of the delayed coking rich gas discharged through the delayed coking rich gas intake line 11. A first pressure measuring device 15 is further arranged on the pipeline at the air outlet end of the fan 12, and a second pressure measuring device 16 is arranged on the delayed coking gas-rich air inlet pipeline 11. A first valve 17 is further arranged on a pipeline between the first pressure measuring device 15 and the primary mixed gas mixing tank 2, the first valve 17 is an electromagnetic valve, and the first valve 17, the first pressure measuring device 15 and the second pressure measuring device 16 are respectively and electrically connected with a controller (not shown in the attached drawings). When the device works, the controller controls the first pressure measuring device 15 to measure the pressure of the pressurized analysis gas, the second pressure measuring device 16 to measure the pressure of the delayed coking rich gas, and when the pressure of the pressurized analysis gas is equal to the pressure of the delayed coking rich gas, the controller controls the first gate valve 17 (namely an electromagnetic valve) and the valve on the delayed coking rich gas inlet pipeline 11 to be opened, so that the pressurized analysis gas and the delayed coking rich gas are discharged into the primary mixed gas mixing tank 2 to be mixed and temporarily stored. Preferably, the first pressure measuring device 15 and the second pressure measuring device 16 are one of a pressure sensor, a vacuum valve, and a pressure measuring valve.
Specifically, as shown in fig. 3, the cooling device 4 includes an air cooler 41, the mixed gas in the primary mixed gas mixing tank 2 is compressed by the compressor 3, the temperature of the mixed gas rises, the air cooler 41 is arranged to reduce the temperature of the mixed gas, and the mixed gas is cooled by air, so that the introduction of an external cold source is reduced, and the operation cost of the device is reduced.
The working principle of the processing device for the heating furnace fuel in the embodiment is that the pressure of the analysis gas is relatively low (about 20-30 KPa), and the pressure of the delayed coking rich gas is relatively high (about 50-60 KPa), so that in order to avoid potential safety hazards caused by gas streaming when the analysis gas and the delayed coking rich gas are directly mixed, the analysis gas needs to be pressurized to enable the pressure of the analysis gas to be equivalent to the pressure of the delayed coking rich gas (namely, the pressure of the analysis gas is enabled to reach about 50-60 KPa). At the same time, the compressor 3 pressurizes the mixed gas formed by the analysis gas and the delayed coking to make the mixed gas reach the pressure standard of the gas entering the desulfurizing tower 5. The desulfurizing tower 5 removes sulfur in the mixed gas, ensures the safety of the exhaust gas after the combustion of the heating furnace, and avoids the pollution of sulfur dioxide or sulfur trioxide and other polluted gases to the atmospheric environment.
The working process of the processing device of the heating furnace fuel in the embodiment is that firstly, after the analytic gas is pressurized by the analytic gas inlet device, the delayed coking rich gas in the delayed coking rich gas inlet pipeline 11 is mixed in the primary mixed gas mixing tank 2 to form mixed gas; secondly, the mixed gas is compressed by a compressor 3 and cooled by a cooling device 4 to remove the moisture in the mixed gas; and finally, the compressed mixed gas enters a desulfurizing tower 5 for desulfurization treatment to form heating furnace fuel and is conveyed to a heating furnace fuel buffer tank 6 for temporary storage and standby.
Example 4:
as shown in fig. 4, as a further optimization of the analysis gas inlet apparatus of the gas inlet apparatus 1 in example 3, in general, in order to reduce the loss to the fan 12 and to increase the service life of the fan 12, the temperature of the gas entering the fan 12 cannot be too high, and therefore, a first water-cooled cooler 14 is further connected to the gas inlet pipe of the analysis gas temporary storage tank 13, and the first water-cooled cooler 14 is used to cool the analysis gas to 20 to 40 ℃. For example, when the blower 12 is a roots blower, the roots blower can operate at an ambient temperature of not more than 40 ℃, and when the gas temperature exceeds 40 ℃, the life of the roots blower is greatly reduced, and thus the first water-cooled cooler 14 is required to cool it.
As shown in fig. 4, as a further improvement of this embodiment and embodiment 3, in summer, since the outside temperature is high in summer, the mixed gas discharged from the compressor 3 cannot be cooled by the air cooler 41, and therefore, the cooling device 4 further includes a second water-cooled cooler 42, and the second water-cooled cooler 42 replaces the heat energy in the mixed gas by cold water, so as to cool the mixed gas and ensure the temperature of the gas entering the desulfurization tower.
Example 3:
as a further improvement to the embodiments 3 and 4, when the temperature of the heating furnace 7 is set to 425 to 450 ℃ during the combustion of the heating furnace fuel, the mixed gas formed by mixing the solution gas and the delayed coking rich gas may not meet the heat energy standard of the heating furnace, and the heating temperature of the heating furnace may not reach the set value. Therefore, the mixed gas needs to be supplemented with part of liquefied petroleum gas so as to ensure the temperature requirement of the heating furnace. Therefore, as shown in fig. 4, the processing apparatus for the fuel of the heating furnace further includes a liquefied petroleum gas replenishing structure, which is provided at the air inlet end of the fuel buffer tank 6 of the heating furnace in parallel with the desulfurizing tower 5.
As shown in fig. 4, as a further optimization of the lpg supplementing structure, the lpg supplementing structure includes a vaporizer 8, the vaporizer 8 is used for vaporizing the lpg gas from a liquid state to a gas state, and a second valve 9 is connected to an inlet pipe of the vaporizer 8, and a third valve 10 is connected to an outlet pipe of the vaporizer 8. And (3) measuring the mixed gas discharged by the desulfurizing tower 5, when the heat value of the mixed gas is smaller than that of the liquefied petroleum gas, adding part of the liquefied petroleum gas for supplement, opening the second valve 9 and the third valve 10, introducing a certain amount of gasified liquefied petroleum gas into the heating furnace fuel buffer tank 6, mixing the gasified liquefied petroleum gas with the mixed gas to form heating furnace fuel, and temporarily storing the heating furnace fuel for later use.
The above-listed detailed description is only a specific description of a possible embodiment of the present invention, and they are not intended to limit the scope of the present invention, and equivalent embodiments or modifications made without departing from the technical spirit of the present invention should be included in the scope of the present invention.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
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