CN219292377U - Oil field waste classification heat treatment coupling device - Google Patents

Abstract

The utility model provides an oilfield waste classification heat treatment coupling device, which comprises: the rotary thermal phase separation device, the fixed bed incinerator and the sequencing batch pyrolysis furnace organically combine different thermal treatment processes together through sufficient classification and pretreatment processes according to the property characteristics of different materials of oilfield waste, so that the integration of the functions of the multi-process device is realized, the operation is simple and convenient, the equipment investment construction cost can be reduced, the pollutant disposal cost is reduced, high-value oil resources in pollutants can be recovered to the greatest extent, and the subsequent pollutant disposal amount is reduced.

Description

Oil field waste classification heat treatment coupling device

Technical Field

The utility model relates to the technical field of oilfield waste treatment, in particular to a coupling device for oilfield waste classification heat treatment.

Background

Oilfield waste is one of the main pollutions generated in petroleum exploration, exploitation, storage and transportation processes in petroleum industry. The types of oilfield solid dangerous waste generated in the oil extraction production process are more, and mainly comprise oil-based drilling cuttings, oil-containing sludge and oil-containing pollutants (for example, HDPE impermeable films, PE films, packaging bags and cotton yarns which are stained with oil products). The oil-containing sludge mainly refers to sandy soil stained with oil stains in crude oil exploitation, and the main components of the oil-containing sludge are oil, water and solids (sandy soil). Oil-based drilling cuttings refer to drilling cuttings produced by using drilling mud formulated with mineral oil as the continuous phase for oil and gas production, including waste oil-based mud. Oleaginous contaminants are a type of hazardous waste that is generated after oil contamination during oil recovery. The oil field waste has high petroleum content, complex material composition and extremely difficult separation and treatment, and is classified as HW08 and HW49 dangerous waste in the national dangerous waste list. If the waste water is directly discharged without treatment, serious pollution to the surrounding environment and even influence on human health can be caused.

At present, various technologies for treating oilfield wastes are used for treating corresponding materials respectively, wherein the heat treatment technology becomes the current mainstream treatment technology due to the advantages of universality, thorough treatment, large treatment capacity and the like. However, because the heat treatment modes are various, when a single heat treatment technology and equipment are adopted independently, the adaptability to the treated materials is weak, and the effect of comprehensively treating the oilfield waste cannot be achieved. For example, the incineration method has the problems of high energy consumption, high requirements on flue gas emission and the like; the requirement of thermal phase separation on the feed is high, especially the water content and the particle size; the sequencing batch pyrolysis furnace has a limited continuous throughput capability and is not suitable for processing large batches of materials, although the requirements for the feedstock are relatively relaxed.

Disclosure of Invention

Aiming at the complex characteristics of oilfield waste and the advantages and technical defects of various heat treatment processes of the oilfield waste, the utility model provides the oilfield waste classification heat treatment coupling device, different heat treatment processes are organically combined together through full classification and pretreatment processes according to the property characteristics of different materials of oilfield waste, the integration of functions of a multi-process device is realized, the operation is simple and convenient, the equipment investment construction cost can be reduced, the pollutant disposal cost is reduced, and meanwhile, high-value oil resources in pollutants can be recovered to the maximum extent and the subsequent pollutant disposal amount is reduced.

The utility model provides an oil field waste classification thermal treatment coupling aggregate unit, includes: rotary thermal phase separation device, fixed bed incinerator and sequencing batch pyrolysis furnace, wherein:

the fixed bed incinerator is used for treating oil-containing pollutant materials, wherein a secondary combustion chamber is communicated with the rotary thermal phase separation device and a heating unit of the sequencing batch pyrolysis furnace, high-temperature flue gas is used as a heat source in the heating process of the rotary thermal phase separation device and the sequencing batch pyrolysis furnace and is communicated to a quenching tower, and then is connected with an absorption device comprising active carbon and quicklime, and a bag-type dust remover is arranged at the tail end of the quenching tower;

the rotary type thermal phase separation device is used for treating relatively loose oil-based drilling rock scraps and oil-containing sludge materials, wherein the rotary kiln is connected with a multifunctional condensing device, the desorbed gas phase is cooled and condensed, and the rotary type thermal phase separation device is connected with an oil-water separation device and then connected with a quenching tower and a secondary combustion chamber in a fixed bed incinerator process;

the sequencing batch pyrolysis furnace is used for treating aged oily sludge and oil sludge packaging materials, wherein the pyrolysis furnace is connected with a multifunctional condensing device, the desorbed gas phase is cooled and condensed, and the pyrolysis furnace is connected with an oil-water separation device and then connected with a quenching tower and a secondary combustion chamber in a fixed bed incinerator process.

Further, the rotary type thermal phase separation device consists of a power unit, a kiln body seal, a waste heat recycling unit, a safety protection unit, a kiln wall temperature detection unit and a material temperature detection unit, wherein the safety protection unit comprises an explosion-proof hole, an oxygen content monitoring system and a nitrogen protection system; the secondary combustion chamber of the fixed bed incinerator is connected with a waste heat recycling unit, and a heat source is provided for the heating cavity through high-temperature flue gas.

Further, the multifunctional condensing equipment consists of a spray cooling unit, a multi-return heat exchange cooling unit, a sewage draining unit, a non-condensable gas drying unit, an explosion-proof device, a dehumidifying unit and a maintenance platform; the dust-containing mixed gas generated by high-temperature thermal phase separation is rapidly cooled in a spray cooling unit and dust is collected, and a spray water header pipe is provided with a filter for preventing large particulate matters from blocking a spray head; then the liquid phase enters a multi-return heat exchange cooling unit for further condensation, and the cooled liquid phase is conveyed into an oil-water separation device for sedimentation separation; after the non-condensable gas is dried in a non-condensable gas drying unit, the non-condensable gas is led to a secondary combustion chamber in a fixed bed incinerator process and is used as supplementary fuel; the top of the multifunctional condensing equipment is provided with an explosion-proof device, and the sewage pump and the wet discharging fan are both arranged in a standby mode.

Further, the oil-water separation device consists of an inclined tube sedimentation tank, an oil discharge pump, a sludge discharge pump and a circulating water pump, and after the sprayed mixture enters oil-water separation equipment, the separation of oil, water and solid is realized; the separated bottom mud is temporarily stored in a material yard by a mud pump and then enters a rotary thermal phase separation device for secondary treatment.

Furthermore, the oilfield waste classification heat treatment coupling device also comprises a cooling water supply system, a cooling circulation system and a heat radiator, wherein the cooling circulation system takes air as a cooling medium, heat exchange is carried out by expanding the heat transfer area by virtue of a plate-fin heat exchanger, and heat is taken away by virtue of air temperature rise after the air passes across fins; the radiators are arranged in series, and each group of radiators is provided with a bypass pipe and a cut-off valve.

According to the oilfield waste classification heat treatment coupling device, oilfield waste is classified and fully pretreated, and then different material characteristics are treated by adopting the applicable heat treatment furnace types, so that the running stability and the treatment effect of different furnace types are greatly improved. Meanwhile, the heat intercommunication and the cooperative treatment of the wastewater and the noncondensable gas among different furnace types are realized, the cost of wastewater treatment during single process use is reduced, tail water and tail gas treatment equipment is shared by different processes, the energy efficiency utilization is improved, and the energy saving and emission reduction effects are improved. The utility model realizes the full and efficient utilization process of heat, has the dual benefits of pollution reduction and carbon reduction, can reduce the comprehensive treatment cost of oilfield wastes, and can furthest recover high-value oil resources in oilfield wastes.

Drawings

FIG. 1 is a block diagram of an oilfield waste classification heat treatment coupling device;

fig. 2 is a structural view of the multifunctional condensing apparatus.

Reference numerals illustrate:

the device comprises a 1-first material temporary storage tank, a 2-second material temporary storage tank, a 3-third material temporary storage tank, a 4-rotary type thermal phase separation device, a 5-fixed bed incinerator, a 6-sequencing batch pyrolysis furnace, a 7-first spiral discharge humidifier, an 8-second spiral discharge humidifier, 9-multifunctional condensing equipment, a 91-spray pipe, a 92-baffle plate, a 93-first-stage condensing unit, a 94-blowdown unit, a 95-second-stage condensing unit, a 96-cooling water inlet, a 97-condensing coil, a 98-cooling water outlet, a 10-cooling water supply system, a 11-secondary combustion chamber, a 12-quenching tower, a 13-oil-water separation device, a 14-oil storage tank, a 15-activated carbon tank, a 16-quicklime tank, a 17-bag dust remover and an 18-chimney; the solid line represents the solid phase line, the long dashed line represents the gas phase line, and the short dashed line represents the liquid phase line.

Detailed Description

The oilfield waste classification heat treatment coupling device provided by the utility model is further described in detail below with reference to the accompanying drawings and specific examples:

as shown in fig. 1 and 2, the oilfield waste classification heat treatment coupling device comprises a first material temporary storage tank 1, a second material temporary storage tank 2, a third material temporary storage tank 3, a rotary thermal phase separation device 4, a fixed bed incinerator 5, a sequencing batch pyrolysis furnace 6, a first spiral discharge humidifier 7, a second spiral discharge humidifier 8, a multifunctional condensing device 9, a spray pipe 91, a baffle plate 92, a primary condensing unit 93, a blow-down unit 94, a secondary condensing unit 95, a cooling water inlet 96, a condensing coil 97, a cooling water outlet 98, a cooling water supply system 10, a secondary combustion chamber 11, a quenching tower 12, an oil-water separation device 13, an oil storage tank 14, an activated carbon tank 15, a quicklime tank 16, a bag-type dust remover 17 and a chimney 18.

The fixed bed incinerator 5 is used for treating oily pollutant materials, wherein high-temperature flue gas generated by the secondary combustion chamber 11 is used as a heat source in a rotary type thermal phase separation device and a sequencing batch pyrolysis furnace heating process, the high-temperature flue gas after heat exchange flows back to the quenching tower 12 to realize a rapid cooling process, the temperature of the flue gas is rapidly reduced to 150-200 ℃ from more than 500 ℃, and then the flue gas is subjected to further adsorption of organic matters, neutralization of acid gas by quicklime and tail end removal of dust by the bag-type dust collector 17, so that the up-to-standard emission of pollutants is finally realized.

The rotary thermal phase separation device 4 is used for treating relatively loose oil-based drilling rock scraps and oil-containing sludge materials, and gas phase desorbed from the rotary kiln enters the multifunctional condensing equipment 9 to realize the cooling condensing process. The liquid phase is an oil-water mixture, and the oil-water separation device 13 is used for further separating high-value oil products from water, and recovering the high-value oil products; the wastewater discharged from the oil-water separation device 13 is introduced to the quenching tower 12 in the fixed bed incinerator process to be used as quench water. The gaseous phase flowing out of the multifunctional condensing equipment 9 contains non-condensable organic components and is led to a secondary combustion chamber 11 in the fixed bed incinerator process to be used as supplementary fuel. The process can furthest recover oil products, simultaneously reduce the additional treatment cost of tail gas and waste water, also provide supplementary fuel for the secondary combustion chamber 11 and further reduce the consumption of fuel gas.

The sequencing batch pyrolysis furnace 6 is used for treating materials such as aged oily sludge, oil sludge packaging bags and the like, and gas phase desorbed from the pyrolysis furnace enters the multifunctional condensing equipment 9 to realize a cooling condensing process. The liquid phase is an oil-water mixture, and the oil-water separation device 13 is used for further separating high-value oil products from water, and recovering the high-value oil products; the wastewater discharged from the oil-water separation device 13 is introduced to the quenching tower 12 in the fixed bed incinerator process to be used as quench water. The gaseous phase flowing out of the multifunctional condensing equipment 9 contains non-condensable organic components and is led to a secondary combustion chamber 11 in the fixed bed incinerator process to be used as supplementary fuel. The process can recover oil product to the maximum limit, reduce the additional treatment cost of tail gas and waste water, provide supplementary fuel for the secondary combustion chamber and further reduce the consumption of fuel gas.

The rotary type thermal phase separation device mainly comprises a power unit, a kiln body seal, a waste heat recycling unit, a safety protection unit (explosion-proof hole, an oxygen content monitoring system, a nitrogen protection system and the like), a kiln wall temperature detection unit, a material temperature detection unit and the like. The secondary combustion chamber of the fixed bed incinerator generates high-temperature flue gas, a continuous heat source is provided for the heating cavity through the waste heat recycling unit, the high-temperature flue gas transfers heat to materials in an indirect heat exchange mode, and after the materials are heated, moisture and oil contained in the materials are gasified and separated from solids.

The multifunctional condensing equipment 9 consists of a spray cooling unit, a multi-return heat exchange cooling unit, a sewage draining unit, a non-condensable gas drying unit, an explosion-proof device, a dehumidifying unit, a maintenance platform and the like. The dust-containing mixed gas generated by high-temperature thermal phase separation is rapidly cooled in a spray cooling unit, dust is collected, and a spray water header pipe is provided with a filter so as to prevent large particulate matters from blocking a spray head; then enters a multi-return heat exchange cooling unit for further condensation, and the cooled liquid phase is conveyed into an oil-water separation device for sedimentation separation. After drying treatment is carried out on the non-condensable gas in the non-condensable gas drying unit, the non-condensable gas is led to a secondary combustion chamber in a fixed bed incinerator process and is used as supplementary fuel. In addition, the top of the multifunctional condensing equipment is provided with an explosion-proof device, and the sewage pump and the wet discharging fan are both one for one, so that the continuous and stable operation of the system is ensured.

The oil-water separation device consists of an inclined tube sedimentation tank, an oil discharge pump, a mud discharge pump and a circulating water pump, and after the sprayed mixture enters oil-water separation equipment, oil, water and solid separation is realized. The separated bottom mud is temporarily stored in a material yard by a mud pump and then enters a rotary thermal phase separation device for secondary treatment. Meanwhile, the liquid level of a water tank and an oil tank in the oil-water separation equipment is remotely monitored, so that timing pollution discharge, drainage and oil discharge are realized.

The cooling water supply system 10 mainly comprises a large-air-volume cooling fan, a radiator, a skid frame structure and the like, adopts skid-mounted structural design, and is convenient to transport and install. The cooling circulation system mainly uses air as a cooling medium, heat exchange is carried out by expanding the heat transfer area according to the plate-fin heat exchanger, and heat is taken away by air temperature rise after the air passes across the fins, so that the purpose of cooling the cooling medium is achieved. The radiators work in a series connection mode, each group of radiators is provided with a bypass pipe and a cut-off valve, when any radiator is damaged, the operation of the radiator can be cut off, and cold water flows to the radiator at the next stage through the bypass pipe to be cooled continuously.

Examples:

all solid dangerous wastes generated in the production process of the Qinghai oil field operation are firstly collected uniformly, and mainly comprise oil-based drilling cuttings, oil-containing sludge and oil-containing pollutants (HDPE impermeable films, PE films, packaging bags and cotton yarns which are stained with oil products), and are conveyed into a local oil sludge comprehensive treatment enterprise of Qinghai province uniformly. All collected oilfield wastes are firstly classified and sorted according to the characteristics of materials, and particularly, the materials with large grain sizes are transported to a raw material storage room by a special small forklift and crushed by a crusher, wherein the crushing grain sizes are about 4-5 cm. The screening and crushing bucket model and parameters are as follows:

(1) Model: MT312 TS25

(2) Bucket capacity: 1.2 formula, weight: 2050kg

(3) External dimensions: length 1.9 m, width 1.5 m, and height 1.6 m.

(4) Treatment medium: soil or oil-containing waste (loose and not agglomerated) containing sundries such as stones, bricks, timber and the like

(5) And (3) an adapter model: 20-25 ton class excavator.

(6) Yield: 8-20 tons/hr.

(7) The product is characterized in that: a screening hopper, two blanking sizes;

1x25mm (knife plate) =25 mm (blanking gap), 90% of the blanking diameter is smaller than 3cm.

2 x25mm (knife plate) =50 mm (blanking gap), 90% of the blanking diameter is smaller than 6cm.

Because the large-grain-size materials are mostly packed with oil sludge, plastic products and the like, the wound surface of the large-grain-size materials is broken after being melted in the extrusion process of crushing equipment, and crushing dust is not generated in the crushing stage. However, as the broken material is dangerous waste, it contains a certain amount of oil sludge, and a closed breaking device is required for breaking in order to control the scattering of dangerous waste. After the full sorting and pretreatment processes, the oilfield waste is roughly treated into three types of materials: the materials are oily pollutants suitable for fixed bed incineration, and most of the materials are HDPE impermeable films, PE films, packaging bags, cotton yarns which are polluted by oil products and the like; one is relatively loose oil-based drilling cuttings and oil-containing sludge material suitable for treatment by a rotary thermal phase separation device; and the other materials are aged oily sludge, oil sludge packaging bags and the like which are suitable for the treatment of the sequencing batch pyrolysis furnace.

The fixed bed incinerator is used for treating oil-containing pollutant materials, and the treatment capacity is 15-20 t/d. The fully crushed oily pollutant materials are fed into a fixed bed incinerator through a screw feeder, and the materials begin to be incinerated under the action of high temperature, and waste residues and tail gas are generated. The tail gas contains pollutants which are not completely burnt out and need to enter a secondary combustion chamber for complete burning out. The combustion decomposition of pollutants is realized under the condition that the residence time exceeds 2s at the high temperature of the secondary combustion chamber above 850 ℃. The high-temperature flue gas generated by the secondary combustion chamber is further used as a heat source in the heating process of the rotary type thermal phase separation device and the sequencing batch pyrolysis furnace, the high-temperature flue gas after heat exchange flows back to the quenching tower to realize the rapid cooling process, the temperature of the flue gas is rapidly reduced to 150-200 ℃ from more than 500 ℃, and then the tail ends of dust are removed by the activated carbon to further adsorb organic matters, the quick lime to neutralize acid gas and the bag-type dust remover 17, so that the up-to-standard emission of pollutants is finally realized.

The rotary thermal phase separation device is used for treating relatively loose oil-based drilling rock scraps and oil-containing sludge materials, and the treatment capacity of the device is 5-8 t/d. The rotary thermal phase separation treatment technology adopts an indirect heating mode to heat oil field floor sludge, tank bottom sludge and refined sludge, organic matters, oil and water in the oil field floor sludge, the oil and the water are subjected to thermal phase separation, discharged gas phase enters settling separation equipment after being sprayed and condensed, oil, sludge and water are separated, the oil is collected, and the sludge and redundant water are discharged periodically. The feeding equipment mainly comprises a feed hopper (double-shaft stirring and vibrating), a belt balance, an iron remover, a belt conveyor and a feeding screw machine, and can realize buffering and conveying of materials, and continuously and uniformly convey the materials to the thermal phase separation equipment for processing. The materials are continuously and evenly conveyed into the kiln cylinder through the feeding equipment, so that the continuous production of the thermal phase separation equipment is realized. The kiln tube is uniformly heated by high-temperature flue gas generated by the combustion of fuel in a hearth, and the moisture and the oil content in the materials are separated from solid particles in an anaerobic environment. The solid residue passes through discharge equipment discharge system, utilizes cooling dust collecting equipment to cool down to the residue and presses down dirt. And the gas phase desorbed from the rotary kiln enters into a multifunctional condensing device to realize the cooling condensing process. The liquid phase is an oil-water mixture, and the separation of high-value oil products and water is realized through the further separation of an oil-water separation device, and the high-value oil products are recovered; the wastewater discharged by the oil-water separation device is led to a quenching tower in the fixed bed incinerator process to be used as quench water. The gas phase flowing out of the multifunctional condensing equipment contains non-condensable organic components and is led to a secondary combustion chamber in the fixed bed incinerator process to be used as supplementary fuel. The process can recover oil product to the maximum limit, reduce the additional treatment cost of tail gas and waste water, provide supplementary fuel for the secondary combustion chamber and further reduce the consumption of fuel gas.

The multifunctional condensing apparatus 9 is composed of a primary condensing unit 93, a secondary condensing unit 95, and a blowdown unit 94. Wherein, in the first-stage condensing unit 93, a spray pipe 91 is arranged for spraying the flue gas for first-stage cooling treatment; at the same time, dust in the flue gas is captured and collected into the sewage disposal system 94; baffles 92 are built in to increase the flow of flue gas to better achieve the mixing and cooling process of flue gas and spray water. The secondary condensing unit 95 is provided with a condensing coil 97, cooling water flows in from a cooling water inlet 96, the flue gas is further cooled by the cooling coil, further cooling of pollutants is realized, and the cooling water flows out from a cooling water outlet 98 and then flows to the cooling water supply system 10 for cooling treatment.

The sequencing batch pyrolysis furnace is used for treating materials such as aged oily sludge, oil sludge packaging bags and the like, the treatment capacity of the equipment is 2-5 t/d, and gas phase desorbed from the pyrolysis furnace enters the multifunctional condensing equipment to realize the cooling condensing process. The liquid phase is an oil-water mixture, and the separation of high-value oil products and water is realized through the further separation of an oil-water separation device, and the high-value oil products are recovered; the wastewater discharged by the oil-water separation device is led to a quenching tower in the fixed bed incinerator process to be used as quench water. The gas phase flowing out of the multifunctional condensing equipment contains non-condensable organic components and is led to a secondary combustion chamber in the fixed bed incinerator process to be used as supplementary fuel. The process can recover oil product to the maximum limit, reduce the additional treatment cost of tail gas and waste water, provide supplementary fuel for the secondary combustion chamber and further reduce the consumption of fuel gas.

For the rotary type thermal phase separation device and the sequencing batch pyrolysis furnace, the anaerobic environment in the heating unit is ensured, and the risk of explosion is prevented. The nitrogen is injected into the heating unit, the nitrogen making machine type number QTN N-20 adopted in the system utilizes the pressure swing adsorption principle, the nitrogen is prepared from air serving as a raw material, the purity of the nitrogen is over 99 percent, the nitrogen sweeps the heating cavity in an emergency, the oxygen content is reduced, compressed air can be provided for equipment, and the air requirement of pneumatic components is met.

While the present utility model has been described in detail with reference to the embodiments, the present utility model is not limited to the above-described embodiments, and various changes can be made without departing from the spirit of the present utility model within the knowledge of those skilled in the art, and the present utility model shall also be considered as the scope of the present utility model.

Claims (5)

1. The utility model provides an oil field waste classification thermal treatment coupling aggregate unit which characterized in that includes: rotary thermal phase separation device, fixed bed incinerator and sequencing batch pyrolysis furnace, wherein:

the fixed bed incinerator is used for treating oil-containing pollutant materials, wherein a secondary combustion chamber is communicated with the rotary thermal phase separation device and a heating unit of the sequencing batch pyrolysis furnace, high-temperature flue gas is used as a heat source in the heating process of the rotary thermal phase separation device and the sequencing batch pyrolysis furnace and is communicated to a quenching tower, and then is connected with an absorption device comprising active carbon and quicklime, and a bag-type dust remover is arranged at the tail end of the quenching tower;

the rotary type thermal phase separation device is used for treating relatively loose oil-based drilling rock scraps and oil-containing sludge materials, wherein the rotary kiln is connected with a multifunctional condensing device, the desorbed gas phase is cooled and condensed, and the rotary type thermal phase separation device is connected with an oil-water separation device and then connected with a quenching tower and a secondary combustion chamber in a fixed bed incinerator process;

the sequencing batch pyrolysis furnace is used for treating aged oily sludge and oil sludge packaging materials, wherein the pyrolysis furnace is connected with a multifunctional condensing device, the desorbed gas phase is cooled and condensed, and the pyrolysis furnace is connected with an oil-water separation device and then connected with a quenching tower and a secondary combustion chamber in a fixed bed incinerator process.

2. The oilfield waste classification heat treatment coupling combination device according to claim 1, wherein the rotary type heat phase separation device consists of a power unit, a kiln body seal, a waste heat recycling unit, a safety protection unit, a kiln wall temperature detection unit and a material temperature detection unit, and the safety protection unit comprises an explosion-proof hole, an oxygen content monitoring system and a nitrogen protection system; the secondary combustion chamber of the fixed bed incinerator is connected with a waste heat recycling unit, and a heat source is provided for the heating cavity through high-temperature flue gas.

3. The oilfield waste classification heat treatment coupling device according to claim 1, wherein the multifunctional condensing equipment comprises a spray cooling unit, a multi-return heat exchange cooling unit, a pollution discharge unit, a non-condensable gas drying unit, an explosion-proof device, a dehumidifying unit and a maintenance platform; the dust-containing mixed gas generated by high-temperature thermal phase separation is rapidly cooled in a spray cooling unit and dust is collected, and a spray water header pipe is provided with a filter for preventing large particulate matters from blocking a spray head; then the liquid phase enters a multi-return heat exchange cooling unit for further condensation, and the cooled liquid phase is conveyed into an oil-water separation device for sedimentation separation; after the non-condensable gas is dried in a non-condensable gas drying unit, the non-condensable gas is led to a secondary combustion chamber in a fixed bed incinerator process and is used as supplementary fuel; the top of the multifunctional condensing equipment is provided with an explosion-proof device, and the sewage pump and the wet discharging fan are both arranged in a standby mode.

4. The oilfield waste classification heat treatment coupling device according to claim 1, wherein the oil-water separation device consists of an inclined tube sedimentation tank, an oil discharge pump, a mud discharge pump and a circulating water pump, and the sprayed mixture enters oil-water separation equipment to realize oil, water and solid separation; the separated bottom mud is temporarily stored in a material yard by a mud pump and then enters a rotary thermal phase separation device for secondary treatment.

5. The oilfield waste classification heat treatment coupling device according to claim 1, further comprising a cooling water supply system, wherein the cooling water supply system comprises a cooling circulation system, a radiator and a sledge frame structure, the cooling circulation system uses air as a cooling medium, heat exchange is performed by expanding a heat transfer area by a plate-fin heat exchanger, and heat is taken away by air temperature rise after the air passes across fins; the radiators are arranged in series, and each group of radiators is provided with a bypass pipe and a cut-off valve.

Images