WO2014019332A1

WO2014019332A1 - Method for producing refined oil with waste plastic and production line thereof

Info

Publication number: WO2014019332A1
Application number: PCT/CN2013/000318
Authority: WO
Inventors: 牟一泽; 牟春祥
Original assignee: 山东汇科通用机械有限公司
Priority date: 2012-08-01
Filing date: 2013-03-19
Publication date: 2014-02-06
Also published as: CN102786980A; CN102786980B

Abstract

The present invention relates to a method for producing refined oil with waste plastic and a production line thereof. The method comprises the following steps: (1) waste plastic pretreatment; (2) cracking reaction; (3) catalytic reaction; (4) condensation; and (5) filter and dehydration. When the waste plastic is subjected to oilation treatment according to the method, the oil yield is high, and the slag yield is low. The production line comprises a feeding device, a high-frequency electric heating reactor, a catalyzing tower, a cooling filtering tank, a cooling liquefying tower and an oil storage tank, wherein the feeding device is connected with the high-frequency electric heating reactor; the high-frequency electric heating reactor is connected with the catalyzing tower via a pipeline; the catalyzing tower is connected with the cooling filtering tank via a pipeline; and the cooling filtering tank is connected with the cooling liquefying tower via a pipeline; and the cooling liquefying tower is connected with the oil storage tank via a pipeline. The present production line is safe in operation, low in fault rate, high in degree of automation, and accurate in temperature control, can continuously operate and has high operating efficiency.

Description

Waste plastic refining production method and production line thereof

The present invention relates to a refining method and a production line, and in particular to a waste plastic refining production method and a production line thereof.

Background technique

With the rapid development of the plastics industry, the application of plastic products has become more and more extensive, and it has penetrated into various fields of the national economy and people's daily lives. It can be said that no other material has such a wide range of uses as plastics. . Due to some excellent properties of plastics, the wastes after use are not perishable, which has accumulated over time and seriously affected the ecological environment of the earth, which has aroused great concern of the world.

At present, the total amount of plastic products in the world has already exceeded 100 million tons. China's plastic products have reached 10 million tons, and the annual growth rate of 13% is growing rapidly. The total amount of waste plastics will also increase sharply. The contradiction between environment and development is coming. The more prominent, the treatment of plastic waste has become urgent. At the same time, the world economy is advancing by leaps and bounds, and the momentum of oil shortage is increasing day by day. Energy has become a major factor restricting the economic development of all countries. It has been proven that the oil on the global land will be exhausted after fifteen years! China has changed from an oil exporting country to an oil importing country. Finding new energy sources has become a concern of all countries in the world.

Nowadays, plastics are mostly waste products. According to the recycling and utilization methods of waste plastics, the following four types are mainly included: material recovery, chemical recovery, heat recovery and oil treatment. Material recovery is the sorting of recycled plastic waste in different categories, then crushed or dissolved, and then mixed with fresh plastic; chemical recovery is suitable for the recovery of deteriorated plastic or multi-variety plastic mixture; heat recovery is passed The method of burning heat recovery; the oiling process is to produce waste gasoline and diesel oil by pyrolysis reaction. Material recovery and chemical recovery have higher requirements for waste plastics, narrower recycling range, low recycling efficiency, and are not conducive to popularization and application; heat recovery is easy to cause environmental pollution, and dust generated by plastic combustion will cause secondary pollution to the environment; The oil treatment has the advantages of no secondary pollution, wide recovery range, high regeneration utilization rate, etc., but it has been widely used, but now the oil processing cost is higher, the oil yield is lower, and the slag rate is higher. The economic benefits are poor.

Summary of the invention

The problem to be solved by the present invention is to provide a high oil yield and a low slag rate for the above problems. Waste plastics refining production method and production line with better economic benefits.

In order to solve the above problems, the technical solution adopted by the present invention is: A waste plastic refining production method, characterized in that: the method comprises the following steps:

1) Pretreatment of waste plastics: crushing waste plastic into floc or fragments;

2) Cracking reaction: The floc or fragmented waste plastic in step 1) is sent to the reaction vessel, and the waste plastic is deheated to 400 ° C through the reaction vessel to cause a cracking reaction to generate a gas;

3) catalytic reaction: catalyzing the gas generated in step 2) in a catalytic tower to generate a vaporized fuel;

4) Condensation: Condensing the vaporized fuel generated in step 3) to produce liquid fuel;

5) Filter dehydration: Filter and dehydrate the liquid fuel generated in step 4) to produce high-purity fuel.

As an optimization scheme, the method further comprises a refining fractionation step of refining the fuel produced in the step 5) through a refining tower to produce gasoline and diesel.

As an optimization scheme, the method further includes an exhaust gas recovery step of performing the gas scrubbing treatment on the remaining gas in the step 4) and storing the gas through the gas storage tank.

A specific optimization scheme, wherein the reactor in the step 2) is a high frequency electric heating reactor.

A specific optimization scheme, wherein the impurities generated in the step 2) are stored after being cooled.

A waste plastic refining production line, comprising a feeding device, a high frequency electric heating reaction kettle, a catalytic tower, a cooling filter tank, a cooling liquefaction tower, a storage tank, a first circulating water cooling tower and a second circulating water cooling tower The loading device is connected to a high-frequency electric heating reaction kettle, and the high-frequency electric heating reaction vessel and the catalytic tower are connected by a pipeline, and the catalytic tower and the cooling filter tank are connected by a pipeline, and the cooling filter tank is cooled and liquefied. The tower is connected by a pipeline, the cooling liquefaction tower is connected to the oil storage tank through a pipeline, the first circulating water cooling tower is connected to the high-frequency electric heating reaction vessel through a pipeline, and the second circulating water cooling tower and the cooling liquefaction tower are passed through Pipe connection.

The high-frequency electric heating reactor is used to heat the waste plastic by high-frequency electric heating, and the temperature control is precise; the reactor is cooled by the first circulating water tower, and the high-frequency electric heating reactor is not required to be stopped after the reaction is completed. Cooling, continuous operation, overcomes the shortcomings of continuous operation, and greatly improves production efficiency.

As an optimization solution, the production line further includes a pressure relief tank, a vacuum tank and a first vacuum pump. The pressure relief tank and the cooling filter tank are connected by a pipe, and the vacuum tank and the pressure relief tank are connected by a pipe, and the first vacuum pump and the vacuum tank are connected by a pipe.

As an optimization scheme, the production line further includes a primary refining tower, a primary refining storage tank, a secondary refining tower, and a secondary refining storage tank, wherein the primary refining tower and the oil storage tank are connected by a pipeline, the primary refining The oil storage tank is connected to the primary refining tower through a pipeline, and the secondary refining tower is connected to the primary refinery storage tank and the secondary refining storage tank through the pipeline.

As an optimization solution, the production line further includes a gas scrubbing tank, a gas storage tank and a gas generator, wherein the gas scrubbing tank and the oil storage tank are connected by a pipeline, and the gas storage tank is respectively connected to the gas scrubbing tank and the gas through the pipeline Generator connection.

The accompanying gas such as formazan and acetamidine produced during the catalytic cracking reaction is recovered by the gas storage tank and used as the energy source of the gas generator, thereby effectively avoiding the discharge of the industrial three wastes.

A specific optimization scheme, the feeding device comprises a shredder, a conveyor, a crusher and a screw feeder, wherein the conveyor is respectively connected with a shredder and a crusher, the crusher and the screw feeder Connected, the screw feeder is connected to a high frequency electric heating reaction kettle.

Through the shredder, conveyor, crusher and screw feeder, the high-frequency electric heating reactor can be continuously supplied to ensure the continuous operation of the production line; the screw feed of the screw feeder drives the feed to improve the catalysis. The progress of the cleavage reaction.

The present invention adopts the above technical solution and has the following advantages: The waste plastic material is subjected to oil treatment by the method of the invention, and the oil yield is high and the slag discharge rate is low.

Through the production line of the invention, the waste plastic is oiled, the waste plastic is heated by high frequency electric power, the temperature control is precise, the cracking catalytic reaction is ensured, the oil quality is greatly improved, the oil yield is high, and the slag rate is high. Low, energy saving and environmental protection.

The production line runs safely, has low failure rate, high degree of automation, accurate temperature control, continuous operation and high work efficiency.

The invention will now be further described with reference to the accompanying drawings and embodiments.

DRAWINGS

1 is a schematic structural view of a waste plastics refining production line in an embodiment of the present invention.

In the picture: ' 1 - shredder; 2-conveyor; 3-crusher; 4-spiral feeder; 5-high frequency electric heating reactor; 6-control electric disk; 7-first circulating water cooling tower; Tower; 9-cooling filter tank; 10-cooling liquefaction tower; 11 - second circulating water cooling tower; 12-first scrubber tank; 13-second scrubber tank; 14-gas generator; 15-gas tank 16-reservoir; 17--second refining tower; 18-second refining tower; 19-second refining storage tank; 20-primary refinery storage tank; 21-vacuum tank; 22-pressure relief tank; - first vacuum pump; 24-out of the canister; 25 - impurity cooling tank; 26 - second vacuum pump.

Detailed ways

'Embodiment: A waste plastic refinery production method, characterized in that the method comprises the following steps:

4) Condensation: Condensate the gasified fuel produced in step 3) to produce liquid fuel;

The method also includes a refining fractionation step of refining the fuel produced in step 5) through a refinery to produce gasoline and diesel.

The method further includes an exhaust gas recovery step of purging the remaining gas in step 4) and storing the gas through the gas storage tank.

The reactor in 'Step 2' is a high frequency electric heating reactor.

The impurities generated in step 2) are stored after cooling.

Through this method, the waste plastics are oiled, and the oil yield and slag rate data are as follows: Use PE, PP, PS and other high oil yield plastics for production:

A, oil rate

Domestic plastics oil production rate is 80%;

The oil production rate of Japanese plastics is 90%;

The mixed plastic oil yield is 60%.

B, slag rate 2%;

The slag production rate of Japanese plastics is 1%;

The slag ratio of the mixed plastic was 1.5%.

As shown in Fig. 1, a waste plastic refining production line includes a feeding device, a high frequency electric heating reactor 5, a catalytic tower 8, a cooling filter tank 9, a cooling liquefaction tower 10, an oil storage tank 16, and a first circulating water. The cooling crucible 7 and the second circulating water cooling tower 11 are connected to the high-frequency electric heating reactor 5, and the high-frequency electric heating reactor 5 is connected to the catalytic tower 8 through a pipeline, and the catalytic tower 8 and the cooling filter tank 9 are passed through a pipeline. Connection, the cooling filter tank 9 and the cooling liquefaction tower 10 are connected by a pipeline, the cooling liquefaction tower 10 and the oil storage tank 16 are connected by a pipeline, and the first circulating water cooling tower 7 and the high-frequency electric heating reactor 5 are connected by a pipeline, the second cycle The water cooling tower 11 and the cooling liquefaction tower 10 are connected by a pipe.

The production line further includes a pressure relief tank 22, a vacuum tank 21 and a first vacuum pump 23. The pressure relief tank 22 and the cooling filter tank 9 are connected by a pipe, and the vacuum tank 21 and the pressure relief tank 22 are connected by a pipe, the first vacuum pump 23 and the vacuum tank 21 Connected by pipe.

The production line further includes a primary refining tower 17, a refining storage tank 20, a secondary refining tower 18, and a secondary refining storage tank 19, and the primary refining tower 17 and the storage tank 16 are connected by pipes, and the refining storage tank 20 is once The refining tower 17 is connected by pipes, and the secondary refining tower 18 is connected to the primary refining storage tank 20 and the secondary refining storage tank 19 through pipes.

The production line further includes a gas scrubbing tank, a gas storage tank 15 and a gas generator 14, and the gas scrubbing tank and the oil storage tank 16 are connected by a pipe, and the gas storage tank 15 is connected to the gas scrubbing tank and the gas generator 14 through pipes, respectively.

The number of the gas tanks is two, the two gas tanks are the first gas tank 12 and the second gas tank 13, and the first gas tank 12 is connected to the oil storage tank 16 through a pipe, the first gas tank 12 is connected to the second scrubber 13 through a pipe, and the second scrubber 13 is connected to the gas tank 15 through a pipe.

The loading device comprises a shredder 1, a conveyor 2, a crusher 3 and a screw feeder 4, respectively connected to the shredder 1 and the crusher 3, and the crusher 3 is connected to the screw feeder 4, the spiral The feeder 4 is connected to the high frequency electric heating reactor 5.

The high-frequency electric heating reactor 5 is provided with a control electric disk 6, and the number of cooling filter tanks 9 is four, and four cooling filter tanks 9 are connected in series.

The production line further includes a dispensing tank 24, an impurity cooling tank 25, and a second vacuum pump 26, through which the dispensing tank 24 passes The pipes are connected to the impurity cooling tank 25 and the high-frequency electric heating reactor 5, respectively, and the impurity cooling tank 25 is connected to the second vacuum pump 26 through a pipe.

After the impurities are fully burned, only a small amount of carbon foam is discharged, and the main component is coarse carbon black, which can be used as a raw material for producing industrial carbon black, and is completely harmless to the environment.

Through the above production line, the waste plastics are oiled, and the oil yield, slag rate and economic benefit data are as follows:

Use PE, PP, PS and other high oil yield plastics for production:

A, oil rate

Domestic plastics oil production rate is 80%;

The oil production rate of Japanese plastics is 90%;

The mixed plastic oil yield is 60%.

B, slag rate

Domestic plastics slag rate is 1. 2% of raw materials;

The slag production rate of Japanese plastics is 1%;

The slag ratio of the mixed plastic was 1.5%.

C Economic benefits

It adopts domestically produced PE, PP, PS and other high oil rate plastics for production. The production line processes 50 tons of garbage per day, and processes 1,500 tons per month. 800kg of oil per ton of waste plastics, 70kg of gas, the direct economic benefit per ton is 3500. -4000 yuan, the net income per line per day is 70,000 yuan, and the net income per line per month is 2,100,000 yuan.

Claims

A method for producing a waste plastic refinery, characterized in that: the method comprises the following steps:

1) Pretreatment of waste plastics: crushing waste plastic into floc or chips;

2) Cracking reaction: The floc or fragmented waste plastic in step 1) is sent to the reaction vessel, and the waste plastic is deheated to 40 CTC through the reaction vessel to cause a cracking reaction to generate a gas;

5) Filtration dehydration: Filter and dehydrate the liquid fuel generated in step 4) to produce high-purity fuel.

2. A waste plastics refinery production process according to claim 1, wherein the method further comprises a refining and fractionating step of refining the fuel produced in step 5) through a refining column to produce steam and diesel.

3. A waste plastics refinery production method according to claim 1, wherein the method further comprises an exhaust gas recovery step of performing the gas scrubbing treatment on the remaining gas in the step 4) and storing the gas through the gas storage tank.

A waste plastic refinery production method according to any one of claims 1 to 3, wherein the reaction vessel in the step 2) is a high frequency electric heating reaction vessel.

A waste plastic refinery production method according to any one of claims 1 to 3, wherein the impurities formed in the step 2) are stored after being cooled.

6. A waste plastic refinery production line, characterized in that: the production line comprises a feeding device, a high frequency electric heating reaction vessel (5), a catalytic tower (8), a cooling filter tank (9), a cooling liquefaction tower (10) Oil storage tank

(16) a first circulating water cooling tower (7) and a second circulating water cooling tower (11), wherein the loading device is connected to the high frequency electric heating reactor (5), and the high frequency electric heating reactor ( 5) connected to the catalytic tower (8) through a pipe, the catalytic tower (8) and the cooling filter tank (9) are connected by a pipe, the cooling filter tank

(9) is connected to the cooling liquefaction tower (10) through a pipe, the cooling liquefaction tower (10) and the oil storage tank (16) are connected by a pipe, and the first circulating water cooling tower (7) is reacted with high-frequency electric heating The kettle (5) is connected by a pipe, and the second circulating water cooling tower (11) is connected to the cooling liquefaction tower (10) through a pipe.

7. A waste plastics refinery production line according to claim 6, wherein: said production line Also included is a pressure relief tank (22), a vacuum tank (21), and a first vacuum pump (23), the pressure relief tank (22) is connected to the cooling filter tank (9) by a pipe, and the vacuum tank (21) is vented The pressure tank (22) is connected by a pipe, and the first vacuum pump (23) is connected to the vacuum tank (21) through a pipe.

8. A waste plastics refinery production line according to claim 6, wherein: said production line further comprises a primary refining tower (17), a primary refinery storage tank (20), a secondary refining tower (18) and two a secondary refinery storage tank (19), the primary refining tower (17) and the oil storage tank (16) are connected by a pipeline, and the primary refinery storage tank (20) is connected to the primary refining tower (17) through a pipeline. The secondary refining tower (18) is connected to the primary refinery storage tank (20) and the secondary refinement storage tank (19) through pipes.

9. A waste plastics refinery production line according to claim 6, wherein: said production line further comprises a scrubber tank, a gas storage tank (15) and a gas generator (14), said scrub tank and said storage tank The oil tanks (16) are connected by pipes, and the gas storage tanks (15) are respectively connected to the gas scrubbing tanks and the gas generator (14) through pipes.

10. A waste plastics refinery production line according to any one of claims 6-9, wherein: said loading device comprises a shredder (1), a conveyor (2), a crusher (3) and a screw feeder (4), the conveyor (2) being connected to a shredder (1) and a crusher (3), respectively, the crusher (3) being connected to a screw feeder (4), The screw feeder (4) is connected to the high frequency electric heating reactor (5).