CN214167748U

CN214167748U - Coupling heat pipe type waste heat recovery oil sludge treatment system

Info

Publication number: CN214167748U
Application number: CN202120114186.9U
Authority: CN
Inventors: 张绮妍
Original assignee: Tianjin Frank Energy Technology Co ltd
Current assignee: Tianjin Frank Energy Technology Co ltd
Priority date: 2021-01-16
Filing date: 2021-01-16
Publication date: 2021-09-10
Anticipated expiration: 2031-01-16

Abstract

The invention relates to a coupling heat pipe type waste heat recovery oil sludge treatment system, which consists of an oil sludge subsystem and a steam-water subsystem, wherein the oil sludge subsystem comprises a solid flow line and a gas-liquid flow line; the solid flow line comprises the drying device, the reduction device, a flue gas treatment device, the steam generator and a draught fan, and all the devices are connected in sequence through pipelines; the gas-liquid material flow line comprises the drying device, the preheater, an oil-water separation device, the reduction device, the flue gas treatment device, the steam generator and the induced draft fan, and all the devices are connected in sequence through pipelines; the steam-water subsystem is formed by sequentially connecting the drying device, the water tank, the water pump, the preheater and the steam generator through pipelines; the preheater and the steam generator are heat pipe type heat exchange devices. The system realizes the reduction, harmless and recycling treatment of the oil sludge through the high-efficiency heat exchange device.

Description

Coupling heat pipe type waste heat recovery oil sludge treatment system

Technical Field

The invention relates to a solid waste treatment system, in particular to a coupling heat pipe type waste heat recovery oil sludge treatment system.

Background

The oily sludge is mainly derived from bottom mud of an oil separation tank, floating slag of a flotation tank, bottom mud of a crude oil tank and the like in the petrochemical industry, generally has the oil content of 10-50 percent and the water content of 40-90 percent, and is accompanied by certain solids. The oily sludge contains a large amount of pathogenic bacteria, parasitic ova, heavy metals such as copper, zinc, chromium and mercury, salts, polychlorinated biphenyl, dioxin and other toxic and harmful substances which are difficult to degrade, and if the oily sludge is not treated, the oily sludge is directly discharged, so that a large amount of land resources are occupied, and surrounding soil, water and air are polluted. At present, the main treatment methods of oily sludge at home and abroad comprise a physical and chemical separation method, a biological treatment method and a heat treatment method. Compared with other treatment modes, the heat treatment method has the advantages of high volume reduction and weight reduction rate, low treatment cost and capability of utilizing heat. The existing heat treatment system has certain applicability to oil sludge treatment, but has the problems of high energy consumption, addition of treatment agents, low waste heat utilization rate, insufficient flue gas waste heat recovery and the like, so that the research on the oil sludge treatment system still has a certain promotion space.

Disclosure of Invention

The invention aims to provide a coupling heat pipe type waste heat recovery oil sludge treatment system, which can fully recover waste heat in an oil sludge treatment process through a high-efficiency heat exchange device and realize reduction, harmless and resource treatment of oil sludge.

In order to achieve the purpose, the invention provides a coupling heat pipe type waste heat recovery oil sludge treatment system, which consists of an oil sludge subsystem and a steam-water subsystem, wherein the oil sludge subsystem and the steam-water subsystem are coupled and connected with a drying device through a preheater, a steam generator and a drying device; the sludge subsystem comprises a solids flow line and a gas-liquid flow line; the solid flow line and the gas-liquid flow line are connected in parallel between the drying device and the reduction device; the solid flow line comprises the drying device, the reduction device, a flue gas treatment device, the steam generator and a draught fan, and all the devices are connected in sequence through pipelines; the gas-liquid material flow line comprises the drying device, the preheater, an oil-water separation device, the reduction device, the flue gas treatment device, the steam generator and the induced draft fan, and all the devices are connected in sequence through pipelines; the steam-water subsystem is formed by sequentially connecting the drying device, the water tank, the water pump, the preheater and the steam generator through pipelines; an oil sludge cavity inlet of the drying device is connected with a feeding pipeline, and an oil sludge cavity outlet is connected with the reduction device through an oil sludge drying pipeline and is also connected with the preheater through an oil-gas pipeline; the inlet of a steam cavity of the drying device is connected with the steam generator through a steam pipeline, and the outlet of the steam cavity is connected with the water tank through a condensed water pipeline; the steam generator is communicated with an external steam pipeline; the water tank is connected with a water replenishing pipeline; the preheater is connected with an inlet of the oil-water separation device and is also connected with the reduction device through a non-condensable gas pipeline; the oil-water separation device is connected with the reduction device through an oil pipeline.

The sludge is evaporated in the drying unit to remove free moisture and to produce a portion of the mixed gas, which is primarily a mixture of volatile oil, hydrocarbons and carbon dioxide, which enters the preheater via the oil and gas line. In the preheater, noncondensable gases are fed to the abatement device separately from other condensable components; the condensable component is separated into oil through the oil-water separation device and sent to the reduction device. By adopting the system, the moisture in the oil sludge is prevented from entering the reduction device to absorb a large amount of heat, so that the treatment temperature does not meet the process requirement and the harmless treatment effect is influenced; after the oil sludge is heated, chemical energy contained in the oil sludge is released in the form of volatile oil gas and hydrocarbon and is converted in the decrement device; the water is preheated by the mixture of oil gas and water evaporated by the oil sludge in the preheater, the water is heated by oil sludge combustion smoke in the steam generator to generate steam, and part of the steam enters the steam cavity to meet the internal heat consumption of the oil sludge treatment system.

Preferably, the preheater and the steam generator are heat pipe type heat exchange devices, and heat exchange elements of the heat pipe type heat exchange devices are heat pipes, so that flue gas can be fully recovered, and the temperature of the discharged flue gas is reduced.

Preferably, the reduction device is an incinerator or a plasma waste treatment device.

Preferably, the mummification device is 5~30 degrees with the contained angle of horizontal plane, condensate water pipeline interface sets up the low level end of mummification device, steam chamber intracavity steam condensate water is in the low level end of mummification device collects, and follows the condensate water pipeline gets back to the water tank.

Drawings

Fig. 1 is a schematic structural diagram of a specific embodiment of a coupling heat pipe type waste heat recovery oil sludge treatment system provided by the present invention.

In the figure: a drying device 1; a sludge chamber 101; a steam chamber 102; a reduction means 2; a flue gas treatment device 3; a steam generator 4; an induced draft fan 5; a preheater 6; an oil-water separation device 7; a water tank 8; a water pump 9; a feed line 10; a dry sludge line 11; an oil and gas pipeline 12; a condensed water line 13; a steam line 14; an outgoing steam line 15; a water replenishing line 16; a non-condensable gas line 17; an oil line 18.

Detailed Description

The core of the invention is to provide a coupling heat pipe type waste heat recovery oil sludge treatment system, which can fully recover the waste heat in the oil sludge treatment process through a high-efficiency heat exchange device, and realize the reduction, harmless and resource treatment of the oil sludge.

In order to make the technical solutions of the present invention better understood by those skilled in the art, the present invention will be further described in detail by the following embodiments with reference to the accompanying drawings.

Referring to fig. 1, the invention provides a coupling heat pipe type waste heat recovery oil sludge treatment system, which comprises an oil sludge subsystem and a steam-water subsystem, wherein the oil sludge subsystem and the steam-water subsystem are coupled and connected with a drying device (1) through a preheater (6), a steam generator (4); the sludge subsystem comprises a solid flow line and a gas-liquid flow line; the solid flow line and the gas-liquid flow line are connected in parallel between the drying device (1) and the reduction device (2); the solid flow line comprises a drying device (1), a reduction device (2), a flue gas treatment device (3), a steam generator (4) and a draught fan (5), and all the devices are connected in sequence through pipelines; the gas-liquid flow line comprises a drying device (1), a preheater (6), an oil-water separation device (7), a reduction device (2), a flue gas treatment device (3), a steam generator (4) and a draught fan (5), and all the devices are connected in sequence through pipelines; the steam-water subsystem is formed by sequentially connecting a drying device (1), a water tank (8), a water pump (9), a preheater (6) and a steam generator (4) through pipelines; an inlet of an oil sludge cavity (101) of the drying device (1) is connected with a feeding pipeline (10), and an outlet of the oil sludge cavity (101) is connected with the reduction device (2) through an oil sludge drying pipeline (11) and is also connected with the preheater (6) through an oil gas pipeline (12); an inlet of a steam cavity (102) of the drying device (1) is connected with the steam generator (4) through a steam pipeline (14), and an outlet of the steam cavity (102) is connected with the water tank (8) through a condensed water pipeline (13); the steam generator (4) is communicated with an external steam pipeline (15); the water tank (8) is connected with a water replenishing pipeline (16); the preheater (6) is connected with the inlet of the oil-water separation device (7) and is also connected with the reduction device (2) through a noncondensable gas pipeline (17); the oil-water separation device (7) is connected with the reduction device (2) through an oil pipeline (18).

The oil sludge is evaporated in the drying device (1) to generate free moisture, and partial mixed gas is generated, wherein the mixed gas is mainly a mixture of volatile oil gas, hydrocarbon and carbon dioxide and enters the preheater (6) through an oil gas pipeline (12). In the preheater (6), the non-condensable gases are separated from other condensable components and fed to the reducing device (2); the condensable components are separated into oil by an oil-water separation device (7) and sent to a reduction device (2). By adopting the system, the moisture in the oil sludge is prevented from entering the reduction device (2) to absorb a large amount of heat, so that the treatment temperature cannot meet the process requirement and the harmless treatment effect is influenced; after the oil sludge is heated, chemical energy contained in the oil sludge is released in the form of volatile oil gas and hydrocarbon and is converted in a reduction device (2); water is preheated by an oil gas and water mixture evaporated from oil sludge in the preheater (6), steam is generated by heating oil sludge combustion flue gas in the steam generator (4), and part of steam enters the steam cavity (102) to meet the internal heat consumption of the oil sludge treatment system.

Specifically, the preheater (6) and the steam generator (4) are heat pipe type heat exchange devices, and heat exchange elements are heat pipes, so that flue gas can be fully recovered, and the temperature of the discharged flue gas is reduced.

Specifically, the reduction device (2) is an incinerator or a plasma waste treatment device.

Specifically, the included angle between the drying device (1) and the horizontal plane is 5-30 degrees, the interface of the condensed water pipeline (13) is arranged at the low end of the drying device (1), and the steam condensed water in the steam cavity (102) is collected at the low end of the drying device (1) and returns to the water tank (8) along the condensed water pipeline (13).

The application effect of the system of the invention is as follows: the low-grade calorific value of the oil sludge is 18.5 MJ/kg, the water content is 51 percent, the daily treatment oil sludge flow is 50 t, and when the waste heat of the flue gas is recovered to 200 ℃, saturated steam at 0.8 MPa/170 ℃ can be generated at 3.75 t/h, wherein 26 percent of the saturated steam is used for the steam consumption of the system, and the rest part of the saturated steam is used for steam output.

The description of the embodiments of the present invention is only for the purpose of assisting understanding of the core idea of the present invention, and is not intended to limit the embodiments of the present invention. It should be understood that any modification, equivalent replacement, and improvement made by those skilled in the art without departing from the principle of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. A coupling heat pipe type oil sludge treatment system for waste heat recovery is characterized by comprising an oil sludge subsystem and a steam-water subsystem, wherein the oil sludge subsystem and the steam-water subsystem are coupled and connected with a drying device (1) through a preheater (6) and a steam generator (4); the sludge subsystem comprises a solids flow line and a gas-liquid flow line; the solid flow line and the gas-liquid flow line are connected in parallel between the drying device (1) and the reduction device (2); the solid flow line comprises the drying device (1), the reduction device (2), a flue gas treatment device (3), the steam generator (4) and a draught fan (5), and all the devices are connected in sequence through pipelines; the gas-liquid flow line comprises the drying device (1), the preheater (6), an oil-water separation device (7), the reduction device (2), the flue gas treatment device (3), the steam generator (4) and the induced draft fan (5), and the devices are sequentially connected through pipelines; the steam-water subsystem is formed by sequentially connecting the drying device (1), a water tank (8), a water pump (9), the preheater (6) and the steam generator (4) through pipelines; an inlet of an oil sludge cavity (101) of the drying device (1) is connected with a feeding pipeline (10), and an outlet of the oil sludge cavity (101) is connected with the reduction device (2) through a dry oil sludge pipeline (11) and is also connected with the preheater (6) through an oil gas pipeline (12); an inlet of a steam cavity (102) of the drying device (1) is connected with the steam generator (4) through a steam pipeline (14), and an outlet of the steam cavity (102) is connected with the water tank (8) through a condensed water pipeline (13); the steam generator (4) is communicated with an external steam pipeline (15); the water tank (8) is connected with a water replenishing pipeline (16); the preheater (6) is connected with an inlet of the oil-water separation device (7) and is also connected with the reduction device (2) through a noncondensable gas pipeline (17); the oil-water separation device (7) is connected with the reduction device (2) through an oil pipeline (18).

2. The coupled heat pipe type waste heat recovery sludge treatment system according to claim 1, wherein the preheater (6) and the steam generator (4) are heat pipe type heat exchange devices, and the heat exchange elements are heat pipes.

3. The coupling heat pipe type waste heat recovery sludge treatment system according to claim 1, wherein the reduction device (2) is selected from an incinerator or a plasma waste treatment device.

4. The coupling heat pipe type waste heat recovery oil sludge treatment system according to claim 1, wherein an included angle between the drying device (1) and a horizontal plane is 5-30 degrees, and an interface of the condensed water pipeline (13) is arranged at a low end of the drying device (1).