CN107043204B

CN107043204B - Fatlute processing system

Info

Publication number: CN107043204B
Application number: CN201710219038.1A
Authority: CN
Inventors: 李先旺; 乔建明; 熊玉; 霍雨佳; 高云云; 王光坤
Original assignee: Wuhan Zhiheng Environment Safety Engineering Technology Co ltd
Current assignee: Wuhan Zhiheng Environment Safety Engineering Technology Co ltd
Priority date: 2017-04-05
Filing date: 2017-04-05
Publication date: 2023-11-07
Anticipated expiration: 2037-04-05
Also published as: CN107043204A

Abstract

The invention discloses an oil sludge treatment system, which comprises: the regulating tank is used for stirring and mixing the oil sludge and water to obtain water emulsion oil sludge; the first-stage three-phase separator is used for carrying out normal-temperature three-phase separation on the water emulsion oil sludge to obtain first-stage oil sludge sand, first-stage sewage and first-stage waste oil; the second-stage three-phase separator is used for heating and three-phase separating the first-stage sewage to obtain a second-stage oil silt, second-stage sewage, second-stage waste oil and organic gas mixture; the oil-water separator is used for separating the primary waste oil from the secondary waste oil to obtain separated waste water and mixed waste oil; the sedimentation tank is used for flocculating and settling the secondary sewage to obtain supernatant and sludge; sintering device and sludge incineration device. The invention adopts two-stage three-phase separation, can generate heat through incineration to generate electricity, can prepare baking-free bricks and sintering materials, and provides a process system with low oil sludge emission.

Description

Fatlute processing system

Technical Field

The invention mainly relates to the technical field of waste treatment, in particular to an oil sludge treatment system.

Background

Sludge can be classified into: floor sludge, tank bottom sludge, ground spilled oil and oil refining sludge. The components of the oil sludge are very complex, and the oil sludge is obviously different along with different geological conditions and production processes, and generally consists of water, sludge and oil organic matters. The oil sludge is mainly characterized in that: the water content is high, and the total volume is large; contains a large amount of organic matters, has complex components and high treatment difficulty; belongs to dangerous waste, and most of harmful components exceed standard, so that serious pollution is caused, and the treatment task is difficult and urgent.

In the prior art, the discharge amount is large when the oil sludge is treated, and the oil sludge cannot be effectively recycled. Therefore, how to properly treat the sludge is a technical problem to be solved by the person skilled in the environment protection field.

Disclosure of Invention

The invention mainly aims to provide an oil sludge treatment system, which aims to solve the defects that the discharge amount is large and the oil sludge cannot be effectively recycled in the prior art.

In order to achieve the above object, the present invention provides an oil sludge treatment system, comprising:

the regulating tank is used for stirring and mixing the oil sludge and water to obtain water emulsion oil sludge;

the first-stage three-phase separator is used for carrying out normal-temperature three-phase separation on the water emulsion oil sludge to obtain first-stage oil sludge sand, first-stage sewage and first-stage waste oil;

the second-stage three-phase separator is used for heating and three-phase separating the first-stage sewage to obtain a second-stage oil silt, second-stage sewage, second-stage waste oil and organic gas mixture;

the oil-water separator is used for separating the primary waste oil from the secondary waste oil to obtain separated waste water and mixed waste oil;

the sedimentation tank is used for flocculating and settling the secondary sewage to obtain supernatant and sludge;

the sintering device is used for performing a sintering process on the secondary oil sludge sand and the sludge;

and the sludge incineration device is used for incinerating the primary oil silt, the fuel and the mixed waste oil and is connected with a generator set.

Preferably, the sedimentation tank and the sintering device further comprise a sludge concentration tank and a plate-and-frame filter press which are connected in sequence, wherein:

the sludge concentration tank is used for concentrating and dehydrating the secondary oil sludge sand and the sludge;

the plate-and-frame filter press is used for carrying out filter pressing on the secondary oil silt and the sludge.

Preferably, the water outlet of the plate-and-frame filter press is connected with the regulating tank.

Preferably, a sludge outlet of the plate-and-frame filter press is connected with the sintering device and the sludge incineration device.

Preferably, the sludge treatment system further comprises a water tank, an air floatation chamber and a membrane treatment unit which are sequentially connected, wherein:

the pool is used for mixing the separated wastewater, the supernatant fluid and the oil-consuming agent;

the air floatation tank is used for carrying out air floatation oil removal on water modulated by the oil-removing agent;

the membrane treatment unit is used for carrying out membrane treatment on the water subjected to air floatation degreasing.

Preferably, the exhaust port of the two-stage three-phase separator is connected with the floatation tank and is used for introducing the organic gas mixture into the floatation tank.

Preferably, an exhaust port is arranged on the air floatation tank and is connected with the sludge incineration device.

Preferably, the sludge treatment system further comprises a baking-free brick preparation device, and the concentrated water discharge port of the membrane treatment unit and the slag discharge port of the sludge incineration device are connected with the baking-free brick preparation device.

Preferably, the sludge treatment system further comprises a waste heat boiler connected with the sludge incineration device, the waste heat boiler is connected with the generator set and the flue gas purification device, and an ash discharge port of the waste heat boiler and an ash discharge port of the flue gas purification device are connected with the baking-free brick preparation device.

Preferably, the sludge incineration device comprises a feeding device and an incinerator which are connected with each other, and the feeding device is used for mixing the primary oil sludge sand and the biomass fuel.

The oil sludge treatment system comprises a first-stage three-phase separator and a second-stage three-phase separator, wherein the first-stage oil sludge sand with high organic matter content can be mixed with fuel for incineration through the second-stage separation, the generated heat is used for generating electricity, and the generated slag is used for manufacturing baking-free bricks; sintering the secondary oil silt with low organic matter content and the sludge obtained after flocculation and precipitation of the secondary sewage to obtain sintered materials such as sintered bricks, road building fillers and the like. The invention provides a low-emission process system for oil sludge, which effectively solves the problem of large pollution in oil sludge treatment in the prior art.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural diagram of an oil sludge treatment system according to an embodiment of the present invention.

Reference numerals illustrate:

reference numerals	Name of the name	Reference numerals	Name of the name
				A-101	First stirrer	A-102	Second stirrer
S-101	One-stage three-phase separator	S-102	Two-stage three-phase separator
				S-103	Sedimentation tank	S-104	Oil-water separator
V-101	Regulating tank	V-102	Oil collecting tank
				V-103	Sludge concentration tank	V-104	Pool
V-105	Air floatation tank	V-106	Membrane treatment unit
				X-101	Fume purifying device	X-102	Generating set
X-103	Baking-free brick preparation device	P-101	First pump
				P-102	Second pump	P-103	Third pump
P-104	Fourth pump	P-105	Fifth pump
				C-101	First fan	C-102	Second fan
C-103	Third fan	C-104	Fourth fan
				M-101	Plate-and-frame filter press	M-102	Feeding device
F-101	Incinerator with a heat exchanger	F-102	Waste heat boiler
				100	Sintering device	200	Chimney

The achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

It should be noted that all directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present invention are merely used to explain the relative positional relationship, movement, etc. between the components in a particular posture (as shown in the drawings), and if the particular posture is changed, the directional indicator is changed accordingly.

Furthermore, descriptions such as those referred to as "first," "second," and the like, are provided for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implying an order of magnitude of the indicated technical features in the present disclosure. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present invention, unless specifically stated and limited otherwise, the terms "connected," "affixed," and the like are to be construed broadly, and for example, "affixed" may be a fixed connection, a removable connection, or an integral body; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

In addition, the technical solutions of the embodiments of the present invention may be combined with each other, but it is necessary to be based on the fact that those skilled in the art can implement the technical solutions, and when the technical solutions are contradictory or cannot be implemented, the combination of the technical solutions should be considered as not existing, and not falling within the scope of protection claimed by the present invention.

Referring to fig. 1, an oil sludge treatment system is provided in this embodiment, and the oil sludge treatment system at least includes an adjusting tank V-101, a primary three-phase separator S-101, a secondary three-phase separator S-102, an oil-water separator S-104, a sedimentation tank S-103, a sintering device 100 and a sludge incineration device.

The regulating tank V-101 is used for stirring and mixing the oil sludge and water to obtain water emulsion oil sludge, and the oil sludge and the water are uniformly mixed by controlling the proportion of the oil sludge P1 to the water consumption for tempering, so that the viscosity is reduced.

The first-stage three-phase separator S-101 is used for carrying out normal-temperature three-phase separation on the water emulsion oil sludge to obtain first-stage oil sludge sand S1, first-stage sewage W1 and first-stage waste oil O1. The water emulsion sludge in the regulating tank V-101 is pumped into the first three-phase separator S-101 through the first pump P-101. The primary three-phase separator S-101 is carried out at normal temperature.

The second-stage three-phase separator S-102 is used for heating and three-phase separating the first-stage sewage W1 to obtain second-stage oil silt S2, second-stage sewage W2, second-stage waste oil O2 and an organic gas mixture G1; the primary sewage W1 can automatically flow into the secondary three-phase separator S-102. A first stirrer A-101 for stirring can be arranged on the first-stage three-phase separator S-101, and a second stirrer A-102 for stirring can be arranged on the second-stage three-phase separator S-102. In addition, the two-stage three-phase separator S-102 is operated in a heated state, preferably heated by steam, and the heating temperature T is less than or equal to 55 ℃.

The oil-water separator S-104 is used for separating the primary waste oil O1 and the secondary waste oil O2 to obtain separated waste water W3 and mixed waste oil O3. The mixed waste oil O3 is used for incineration, and the separated waste water W3 is subjected to purification treatment.

The sedimentation tank S-103 is used for flocculating and settling the secondary sewage W2 to obtain supernatant W4 and sludge S3. Flocculant such as PAM (inorganic salt coagulant)/PAC (nonionic polymeric flocculant) or the like may be added to the sedimentation tank S-103.

The sintering device 100 is used for performing a sintering process on the secondary oil sludge sand S2 and the sludge S3, and sintered materials such as sintered bricks, road fillers, and the like can be obtained.

The sludge incineration device is used for incinerating the primary oil silt S1, fuel and the mixed waste oil O3, and is connected with the generator set X-102. The fuel is preferably biomass fuel such as chaff, crushed straw, etc. The heat generated by incineration is preferably sent to the generator set X-102 in the form of steam. The sludge incineration device can comprise a feeding device M-102 and an incinerator F-101 which are connected with each other, wherein the feeding device M-102 is used for mixing the primary oil sludge sand with the biomass fuel. The primary oil sludge and sand S1 can enter the feeding device M-102 through the guide plate under the action of the compressed air sludge blower. The incinerator F-101 is preferably a double-station double-circulation sludge incinerator. The mixed waste oil O3 can be buffered in the oil collecting tank V102 and sent to the incinerator F-101 through the third pump P-103 as required.

The sludge treatment system of the embodiment comprises the first-stage three-phase separator S-101 and the second-stage three-phase separator S-102, and the first-stage sludge sand with high organic matter content can be mixed with fuel for incineration through the second-stage separation, so that the generated heat is used for generating electricity, and the generated slag is used for manufacturing baking-free bricks; the embodiment provides a low-emission (near-zero emission) process system for the oil sludge, which effectively solves the problem of large pollution in the treatment of the oil sludge in the prior art.

Further, a sludge concentration tank V-103 and a plate-and-frame filter press M-101 which are connected in sequence are also included between the sedimentation tank S-103 and the sintering device 100, wherein: the sludge concentration tank V-103 is used for concentrating and dehydrating the secondary oil sludge sand S2 and the sludge S3; the plate-and-frame filter press M-101 is used for carrying out filter pressing on the secondary oil sludge sand S2 and the sludge S3. The sludge concentration tank V-103 and the plate-and-frame filter press M-101 can be connected through the second pump P-102, so that sludge pumping is facilitated. The sludge concentration tank V-103 and the plate-and-frame filter press M-101 are used for carrying out sintering pretreatment to obtain filter-pressed sludge S4 and filter-pressed sewage W5. The water content in the filter-pressed sludge S4 is about 70-80%.

Preferably, the sludge outlet of the plate and frame filter press M-101 is connected with the sintering device 100 and the sludge incineration device. Namely, the treatment of the filter-pressed sludge S4 comprises two processes of high-temperature sintering and incineration treatment. In addition, the water outlet of the plate-and-frame filter press M-101 is connected with the regulating tank V-101. Namely, the filter-pressed sewage W5 enters an adjusting tank V-101 for tempering the oil sludge P1. Preferably, only a part (i.e., W7 in FIG. 1) of the filter-press sewage W5 entering the regulating tank V-101 is subjected to the purification treatment, and the other part (i.e., W6 in FIG. 1) is subjected to the purification treatment.

In order to optimize the water purification effect, the sludge treatment system preferably further comprises a water tank V-104, an air floatation chamber V-105 and a membrane treatment unit V-106 which are sequentially connected, wherein the water tank V-104 is used for mixing the separated wastewater W3, the supernatant W4 and the oil-consuming agent; the air floatation tank V-105 is used for carrying out air floatation oil removal on water modulated by the oil-removing agent; the membrane treatment unit V-106 is used for carrying out membrane treatment on the water subjected to air floatation degreasing. Quenching and tempering oil removal can be performed in the water tank V-104, and trace oil contained in the water tank V-104 can be removed through an oil removing agent. After the air floatation, ultrafiltration and reverse osmosis processes, purified water and concentrated water are produced, wherein the purified water is recycled. In addition, a portion W6 of the filter-pressed wastewater W5 can also be introduced into the basin V-104. The water tank V-104 and the air floatation chamber V-105 can be connected through a fourth pump P-104, and the air floatation chamber V-105 and the membrane processing unit V-106 can be connected through a fifth pump P-105.

In addition, the exhaust port of the two-stage three-phase separator S-102 is connected with the air floatation chamber and is used for introducing the organic gas mixture G1 into the air floatation chamber. The organic gas mixture G1 can enter the bottom of the air floatation chamber V-105 through the first fan C-101 for aeration, and the recovered gas G2 is generated. The recovered gas G2 can be introduced into a sludge incineration device for incineration, namely, an exhaust port is arranged on the air floatation chamber V-105 and is connected with the sludge incineration device. The recovered gas G2 is collected and sent to a sludge incineration device together with secondary air through a second fan C-102. In addition, the sludge incineration device also blows air through a third fan C-103.

In addition, the sludge treatment system preferably further comprises a baking-free brick preparation device X-103, wherein the concentrated water discharge port of the membrane treatment unit V-106 and the slag discharge port of the sludge incineration device are connected with the baking-free brick preparation device X-103. Namely, the concentrated water discharged by the membrane treatment unit V-106 can be used for tempering and molding baking-free bricks.

As shown in fig. 1, the sludge treatment system of this embodiment further includes a waste heat boiler F-102 connected to the sludge incineration device, the waste heat boiler F-102 is connected to the generator set X-102 and the flue gas purification device X-101, and the ash discharge port of the waste heat boiler F-102 and the ash discharge port of the flue gas purification device X-101 are connected to the baking-free brick preparation device X-103. Slag and fly ash generated by the waste heat boiler F-102 and the flue gas purifying device X-101 are also used for manufacturing baking-free bricks. In addition, other baking-free brick raw materials can be added. The flue gas cleaning device X-101 may be connected to the stack 200 via a fourth fan C-104.

The foregoing description is only of the preferred embodiments of the present invention, and is not intended to limit the scope of the invention, but rather is intended to cover any equivalents of the structures or equivalent processes disclosed herein or in the alternative, which may be employed directly or indirectly in other related arts.

Claims

1. A sludge treatment system comprising:

2. The sludge treatment system of claim 1, further comprising a sludge thickening tank and a plate and frame filter press connected in sequence between the sedimentation tank and the sintering device, wherein:

3. The sludge treatment system of claim 2, wherein the water outlet of the plate and frame filter press is connected to the conditioning tank.

4. The sludge treatment system of claim 2 wherein a sludge outlet of the plate and frame filter press is connected to the sintering device and to the sludge incineration device.

5. The sludge treatment system of any of claims 1-4, further comprising a water basin, an air bearing chamber, and a membrane treatment unit connected in sequence, wherein:

6. The sludge treatment system of claim 5 wherein an exhaust port of said two-stage three-phase separator is coupled to said floatation tank for introducing said organic gas mixture into said floatation tank.

7. The sludge treatment system of claim 6, wherein an exhaust port is provided on the floatation tank, the exhaust port being connected to the sludge incineration device.

8. The sludge treatment system of claim 5, further comprising a baking-free brick preparation device, wherein the dense water discharge port of the membrane treatment unit and the slag discharge port of the sludge incineration device are connected to the baking-free brick preparation device.

9. The sludge treatment system of claim 8, further comprising a waste heat boiler coupled to the sludge incineration device, the waste heat boiler coupled to the generator set and the flue gas cleaning device, and a dust outlet of the waste heat boiler and a dust outlet of the flue gas cleaning device coupled to the baking-free brick preparation device.

10. The sludge treatment system of any one of claims 1-4 wherein the sludge incineration device comprises a feeding device and an incinerator connected to each other, the feeding device being configured to mix the primary sludge sand with fuel.