CN113526812A - Process system and method for performing forming cracking on oil sludge - Google Patents
Process system and method for performing forming cracking on oil sludge Download PDFInfo
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- CN113526812A CN113526812A CN202110947127.4A CN202110947127A CN113526812A CN 113526812 A CN113526812 A CN 113526812A CN 202110947127 A CN202110947127 A CN 202110947127A CN 113526812 A CN113526812 A CN 113526812A
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- flue gas
- oil sludge
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/10—Treatment of sludge; Devices therefor by pyrolysis
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/13—Treatment of sludge; Devices therefor by de-watering, drying or thickening by heating
-
- 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
- C10G1/00—Production of liquid hydrocarbon mixtures from oil-shale, oil-sand, or non-melting solid carbonaceous or similar materials, e.g. wood, coal
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/40—Valorisation of by-products of wastewater, sewage or sludge processing
Abstract
A process system and a method for carrying out molding cracking on oil sludge mainly comprise an oil sludge storage yard, a screening and crushing device, an oil sludge pretreatment device, a mixing and stirring molding device, a drying device, an integrated cracking furnace, a flue gas circulation device, a purification and separation device, a flue gas afterburning device and an environment-friendly device, wherein firstly, the oil sludge in the oil sludge storage yard enters the screening and crushing device, impurities in the oil sludge are screened and removed, and meanwhile, large block-shaped oil sludge is crushed into powder oil sludge; the powdery oil sludge is heated and dried in the oil sludge pretreatment device to generate waste gas (steam and oil gas) and dried oil sludge, a heating heat source is hot flue gas of a flue gas circulation device, the waste gas is completely sent into a flue gas afterburning device to be combusted, and the flue gas after being heated and dried is sent into an environment-friendly device to be purified; the dried oil sludge enters a mixing and stirring forming device, is mixed and stirred with a forming adhesive and is hot-pressed and formed into formed oil sludge; the formed oil sludge is heated and dried in a drying device, a drying heat source is hot flue gas of a flue gas circulating device, and the flue gas subjected to heating and drying is sent into an environment-friendly device for purification treatment; the dried formed oil sludge is heated and cracked indirectly by high-temperature flue gas in an integrated cracking furnace to generate cracked oil gas and high-temperature slag, the cracked oil gas is purified and separated into oil products and cracked gas in a purification and separation device, part of the cracked gas enters a flue gas afterburning device to be burnt, and part of the cracked gas enters the lower section of the integrated cracking furnace to cool the high-temperature slag.
Description
Technical Field
The invention is applied to the field of oil sludge cleaning treatment, and particularly relates to a process system and a method for performing molding cracking on oil sludge.
Background
At present, the treatment of the oil sludge mainly adopts an incineration mode, a drying mode and a cracking mode, the treatment cost of the incineration mode is high, the normal operation of an incinerator is influenced by the coking phenomenon, energy sources cannot be effectively recovered, and the pollutants after incineration cannot reach the national emission standard; caking and coking in equipment are easily caused by a drying mode, so that the equipment is scrapped, and the oily sludge treated by the common oil sludge drying process cannot reach the standard rate; the cracking mode has serious in-furnace coking, which affects the pyrolysis effect and the stable operation of facilities, has serious secondary pollution, higher cost, complex equipment, poor reliability and other defects, so the aims of low cost and high-efficiency operation of the equipment cannot be achieved.
The process system and the method adopt a cracking mode, firstly carry out pretreatment to remove most of external water, then mix and stir the external water with the adhesive, carry out hot press molding and dry the external water into the molding mud, the molding mud carries out uniform heat exchange with the generated high-temperature flue gas in the integrated cracking furnace, the oil in the molding mud is separated out by high-temperature pyrolysis, and the purposes of low cost and high-efficiency operation of the cracking device are ensured.
Disclosure of Invention
Based on the current situation, the invention provides a process system and a method for carrying out forming cracking on oil sludge, and aims to solve the problems of serious secondary pollution and low operating efficiency of a cracking furnace of the oil sludge in the cracking process.
A process system and a method for performing molding cracking on oil sludge are characterized by comprising the following steps: the process system and the method mainly comprise an oil sludge storage yard, a screening and crushing device, an oil sludge pretreatment device, a mixing and stirring forming device, a drying device, an integrated cracking furnace, a flue gas circulating device, a purifying and separating device, a flue gas afterburning device and an environment-friendly device, and the process flow is as follows:
(1) the oil sludge in the oil sludge storage yard enters a screening and crushing device, impurities in the oil sludge are screened and removed, and meanwhile, large block-shaped oil sludge is crushed into powder-shaped oil sludge;
(2) the powdery oil sludge is heated and dried in the oil sludge pretreatment device to generate waste gas (steam and oil gas) and dried oil sludge, a heating heat source is hot flue gas of a flue gas circulation device, the waste gas is completely sent into a flue gas afterburning device to be combusted, and the flue gas after being heated and dried is sent into an environment-friendly device to be purified;
(3) the dried oil sludge enters a mixing and stirring forming device, is mixed and stirred with a forming adhesive and is hot-pressed and formed into formed oil sludge;
(4) the formed oil sludge is heated and dried in a drying device, a drying heat source is hot flue gas of a flue gas circulating device, and the flue gas subjected to heating and drying is sent into an environment-friendly device for purification treatment;
(5) the dried formed oil sludge is heated and cracked indirectly by high-temperature flue gas in an integrated cracking furnace to generate cracked oil gas and high-temperature slag, the cracked oil gas is purified and separated into oil products and cracked gas in a purification and separation device, part of the cracked gas enters a flue gas afterburning device to be burnt, and part of the cracked gas enters the lower section of the integrated cracking furnace to cool the high-temperature slag.
By adopting the process system and the method, after most of external water is removed by pretreating the oil sludge, the oil sludge is mixed with the adhesive, stirred, hot-pressed and molded and dried to form the molded sludge; the flue afterburning device generates high-temperature flue gas by mixing and burning the waste gas generated by the oil sludge pretreatment device and part of pyrolysis gas and circulating flue gas generated by the pyrolysis purification and separation device, so that the aim of self-production and self-use is fulfilled, and the effects of saving energy consumption and reducing cost are achieved.
A further technical scheme is that the process system and the method for carrying out the forming and cracking on the oil sludge are characterized by comprising the following steps: the integrated cracking furnace is a vertical furnace body consisting of a cracking section and a cooling section, wherein a plurality of layers of high-temperature flue gas heat exchange tubes which form an included angle of 90 degrees between layers and are transversely arranged are arranged in the cracking section, and a cooling source of the cooling section is cold cracked gas produced by the integrated cracking furnace.
Adopt above-mentioned technical scheme, constitute the integrated pyrolysis furnace of vertical furnace body by pyrolysis section, cooling zone, have that the productivity is big, the feeding is continuous, the even characteristics of the inside heat transfer of furnace body, be equipped with the multilayer high temperature flue gas heat exchange tube that forms 90 contained angles and transverse arrangement between the layer in the pyrolysis section, divide into a plurality of even little spaces to the inside of integrated pyrolysis furnace, make fatlute all-round be heated evenly in the inside of integrated pyrolysis furnace.
According to a further technical scheme, the flue gas circulating device is connected with the oil sludge pretreatment device, the drying device and the flue gas afterburning device through hot flue gas pipelines, and hot flue gas of the integrated cracking furnace is respectively sent into the oil sludge pretreatment device, the drying device and the flue gas afterburning device.
By adopting the technical scheme, hot flue gas of the integrated cracking furnace enters the oil sludge pretreatment device and the drying device, so that the oil sludge pretreatment device and the drying device heat and dry oil sludge through the hot flue gas, the used flue gas enters the environment-friendly device to enable the flue gas to reach the national emission standard, and the flue gas entering the flue gas afterburning device is recycled after being heated.
According to a further technical scheme, waste gas and pyrolysis gas in the flue gas afterburning device are combusted to heat circulating hot flue gas, and high-temperature flue gas generated enters the integrated cracking furnace for heat exchange and cracking.
By adopting all the technical schemes, the waste gas in the flue gas after-combustion device and the pyrolysis gas in the pyrolysis gas purification and separation device can be mixed and combusted in the flue gas after-combustion device, the hot flue gas in the flue gas circulation device is heated to form high-temperature flue gas, and the high-temperature flue gas enters the integrated cracking furnace to carry out heating cracking on the mould mud, so that the effect of reducing energy consumption is achieved.
Drawings
FIG. 1 Process diagram of the system of the present invention
Detailed Description
The invention is further illustrated by the following examples in conjunction with the accompanying drawings.
As shown in fig. 1, a process system and a method for performing formation cracking on oil sludge are characterized by comprising: the process system and the method mainly comprise an oil sludge storage yard, a screening and crushing device, an oil sludge pretreatment device, a mixing and stirring forming device, a drying device, an integrated cracking furnace, a flue gas circulating device, a purifying and separating device, a flue gas afterburning device and an environment-friendly device, and the process flow is as follows:
(1) the oil sludge in the oil sludge storage yard enters a screening and crushing device, impurities in the oil sludge are screened and removed, and meanwhile, large block-shaped oil sludge is crushed into powder-shaped oil sludge;
(2) the powdery oil sludge is heated and dried in the oil sludge pretreatment device to generate waste gas (steam and oil gas) and dried oil sludge, a heating heat source is hot flue gas of a flue gas circulation device, the waste gas is completely sent into a flue gas afterburning device to be combusted, and the flue gas after being heated and dried is sent into an environment-friendly device to be purified;
(3) the dried oil sludge enters a mixing and stirring forming device, is mixed and stirred with a forming adhesive and is hot-pressed and formed into formed oil sludge;
(4) the formed oil sludge is heated and dried in a drying device, a drying heat source is hot flue gas of a flue gas circulating device, and the flue gas subjected to heating and drying is sent into an environment-friendly device for purification treatment;
(5) the dried formed oil sludge is heated and cracked indirectly by high-temperature flue gas in an integrated cracking furnace to generate cracked oil gas and high-temperature slag, the cracked oil gas is purified and separated into oil products and cracked gas in a purification and separation device, part of the cracked gas enters a flue gas afterburning device to be burnt, and part of the cracked gas enters the lower section of the integrated cracking furnace to cool the high-temperature slag.
The process system and the method are implemented, the oil sludge is conveyed from the oil sludge storage yard to the screening and crushing device, impurities in the oil sludge are screened and removed, and simultaneously, the large block-shaped oil sludge is crushed into powder-shaped oil sludge; the powdery oil sludge enters an oil sludge pretreatment device to be heated and dried to generate smoke, waste gas (steam and oil gas) and dried oil sludge, a heating heat source is hot smoke of a smoke circulating device, and the heated and dried smoke is sent into an environment-friendly device to be purified; the waste gas is completely sent into a smoke afterburning device for burning, the dried oil sludge is sent to a mixing and stirring forming device to be mixed and stirred with a forming adhesive, and the mixture is hot-pressed and formed into formed oil sludge; the formed oil sludge is heated and dried in a drying device, a drying heat source is hot flue gas of a flue gas circulating device, and the flue gas subjected to heating and drying is sent into an environment-friendly device for purification treatment; the dried formed oil sludge enters an integrated cracking furnace and is indirectly heated and cracked by high-temperature flue gas to generate cracked oil gas and high-temperature slag, the cracked oil gas is purified and separated into oil products and cracked gas in a purification and separation device, part of the cracked gas enters a flue gas afterburning device to be burnt, and part of the cracked gas enters the lower section of the integrated cracking furnace to cool the high-temperature slag.
The integrated cracking furnace is a vertical furnace body consisting of a cracking section and a cooling section, wherein a plurality of layers of high-temperature flue gas heat exchange tubes which form an included angle of 90 degrees between layers and are transversely arranged are arranged in the cracking section, and a cooling source of the cooling section is cold cracked gas produced by the integrated cracking furnace.
By adopting the method, the integrated cracking furnace with the vertical furnace body is composed of the cracking section and the cooling section, the cracking section is transversely arranged by using the multilayer high-temperature flue gas heat exchange tubes with 90-degree included angles formed between layers, the inside of the integrated cracking furnace is divided into a plurality of uniform small spaces, the purposes that oil sludge is uniformly heated inside the integrated cracking furnace, the heating and temperature rising are fast, and the operation efficiency of the whole cracking furnace device is high are ensured, and the cooling source of the cooling section uses cold cracking gas produced by the integrated cracking furnace, so that the effect of reducing the energy consumption is achieved.
The flue gas circulating device is connected with the oil sludge pretreatment device, the drying device and the flue gas afterburning device through a hot flue gas pipeline, and hot flue gas of the integrated cracking furnace is respectively sent into the oil sludge pretreatment device, the drying device and the flue gas afterburning device.
By adopting the method, the flue gas circulation device is characterized in that hot flue gas generated by the integrated cracking furnace passes through the hot flue gas pipeline, one part of the hot flue gas enters the oil sludge pretreatment device and the drying device for heating and drying treatment, so that the problems of slow temperature rise of the oil sludge in the heating and drying process and low operation efficiency of the cracking device are solved, the other part of the hot flue gas enters the integrated cracking furnace for circulation use after being combusted and heated in the flue gas afterburning device, and the environmental protection property of a process system is ensured.
And the waste gas and the pyrolysis gas in the flue gas afterburning device are combusted to heat the circulating hot flue gas, and the generated high-temperature flue gas enters the integrated cracking furnace for heat exchange and cracking.
By adopting the method, the high-temperature flue gas is generated by mixing, burning and heating the circulating flue gas in the flue gas afterburning device by the waste gas in the oil sludge pretreatment device and the pyrolysis gas in the pyrolysis gas purification and separation device, and then enters the integrated cracking furnace to carry out heat exchange cracking on the molded sludge, so that the purpose of self-production and self-use is achieved, and the effect of saving energy consumption is achieved.
In addition to the methods set forth in this example, other embodiments related thereto are also within the scope of the present application.
Claims (4)
1. A process system and a method for performing molding cracking on oil sludge are characterized by comprising the following steps: the process system and the method mainly comprise an oil sludge storage yard, a screening and crushing device, an oil sludge pretreatment device, a mixing and stirring forming device, a drying device, an integrated cracking furnace, a flue gas circulating device, a purifying and separating device, a flue gas afterburning device and an environment-friendly device, and the process flow is as follows:
(1) the oil sludge in the oil sludge storage yard enters a screening and crushing device, impurities in the oil sludge are screened and removed, and meanwhile, large block-shaped oil sludge is crushed into powder-shaped oil sludge;
(2) the powdery oil sludge is heated and dried in the oil sludge pretreatment device to generate waste gas (steam and oil gas) and dried oil sludge, a heating heat source is hot flue gas of a flue gas circulation device, the waste gas is completely sent into a flue gas afterburning device to be combusted, and the flue gas after being heated and dried is sent into an environment-friendly device to be purified;
(3) the dried oil sludge enters a mixing and stirring forming device, is mixed and stirred with a forming adhesive and is hot-pressed and formed into formed oil sludge;
(4) the formed oil sludge is heated and dried in a drying device, a drying heat source is hot flue gas of a flue gas circulating device, and the flue gas subjected to heating and drying is sent into an environment-friendly device for purification treatment;
(5) the dried formed oil sludge is heated and cracked indirectly by high-temperature flue gas in an integrated cracking furnace to generate cracked oil gas and high-temperature slag, the cracked oil gas is purified and separated into oil products and cracked gas in a purification and separation device, part of the cracked gas enters a flue gas afterburning device to be burnt, and part of the cracked gas enters the lower section of the integrated cracking furnace to cool the high-temperature slag.
2. The system and method of claim 1, wherein the system comprises: the integrated cracking furnace is a vertical furnace body consisting of a cracking section and a cooling section, a plurality of layers of high-temperature flue gas heat exchange tubes which form an included angle of 90 degrees between layers and are transversely arranged are arranged in the cracking section, and a cooling source of the cooling section is cold cracked gas produced by the integrated cracking furnace.
3. The system and method of claim 1, wherein the system comprises: the flue gas circulating device is connected with the oil sludge pretreatment device, the drying device and the flue gas afterburning device through a hot flue gas pipeline, and hot flue gas of the integrated cracking furnace is respectively sent into the oil sludge pretreatment device, the drying device and the flue gas afterburning device.
4. The system and method of claim 1, wherein the system comprises: and the waste gas and the pyrolysis gas in the flue gas afterburning device are combusted to heat the circulating hot flue gas, and the generated high-temperature flue gas enters the integrated cracking furnace for heat exchange and cracking.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110947127.4A CN113526812A (en) | 2021-08-18 | 2021-08-18 | Process system and method for performing forming cracking on oil sludge |
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| CN202110947127.4A CN113526812A (en) | 2021-08-18 | 2021-08-18 | Process system and method for performing forming cracking on oil sludge |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115286206A (en) * | 2022-08-02 | 2022-11-04 | 重庆富燃科技股份有限公司 | Oil sludge pretreatment device |
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2021
- 2021-08-18 CN CN202110947127.4A patent/CN113526812A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115286206A (en) * | 2022-08-02 | 2022-11-04 | 重庆富燃科技股份有限公司 | Oil sludge pretreatment device |
| CN115286206B (en) * | 2022-08-02 | 2023-04-25 | 重庆富燃科技股份有限公司 | Fatlute preprocessing device |
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