TWI833131B - Subcritical water hydrolysis method and device - Google Patents

Abstract

The present invention relates to a subcritical water hydrolysis method and device. Subcritical water has high dissolving power. It can dissolve oil and decompose organic matter without adding additional chemicals. Subcritical water is a state of water under a high-temperature and high-pressure environment, so to obtain subcritical water, it is required to employ a vapor machine which can constitute the high-temperature and high-pressure environment; however, the subcritical water vapor remaining in the vapor machine after treatment will condense into water and mix with the subcritical water after treatment, causing difficulties in subsequent treatment. The present invention solves the aforesaid problem by directing the subcritical water vapor back to the vapor bottle.

Description

Subcritical hydrolysis method and device

The invention relates to a subcritical hydrolysis method and device.

Chemical solvents are often added when processing organic matter, which not only pollutes the environment, but also the treated organic matter cannot be reused. In order to achieve environmental protection and economic benefits while treating organic matter, the People's Republic of China Patent Publication No. CN102039297A "Medical Waste Subcritical hydrolysis treatment device" and the People's Republic of China Patent Publication No. CN107460111A "Organic solid waste treatment system and disposal method based on subcritical hydrolysis" use subcritical water with extremely high solubility and do not need to add other additional chemical solvents It can decompose grease or organic matter, carbonize the organic matter and make solid fuel, which can be used as renewable energy. However, since subcritical liquid water is a state of water under high temperature and pressure, in order to maintain the state of subcritical liquid water, large units such as steam generators are often used to maintain the pressure and temperature in the system. The equipment is large and complex.

Therefore, there is the People's Republic of China Patent Publication No. CN110918602A "Distributed Medical Waste Subcritical Hydrolysis Treatment Device", which uses an electric heating ring to maintain the temperature of the system. The device is simple and eliminates the need for steam input from external large units, allowing waste to be processed nearby.

However, since in the aforementioned case, after the waste is processed, the remaining subcritical water vapor and the subcritical liquid water after the waste are still in the same space, when the subcritical water vapor condenses into water and mixes with the subcritical liquid water after the waste is processed, , which will cause subsequent difficulties in handling subcritical liquid water.

Therefore, in order to avoid residual subcritical water vapor condensing into water and mixing with the subcritical liquid water after treatment, the inventor proposes a subcritical hydrolysis method. The steps are: placing a treated object in a closed container, and The closed container is connected to a steam bottle of a steam supply unit through a valve. The steam supply unit generates water vapor in the steam bottle, and introduces the water vapor into the airtight container, so that the airtight container forms a subcritical state and contains a subcritical liquid water and a subcritical water vapor, and reaches the After the subcritical state, the valve is closed, and the steam supply unit no longer generates the water vapor in the steam bottle. A heating ring is wrapped around the periphery of the airtight container, and the airtight container is heated using the heating ring to maintain the airtight container in the subcritical state. After the object to be processed is dissolved in the subcritical liquid water, the valve is opened to allow the subcritical water vapor in the closed container to flow back to the steam bottle, where it is cooled and condensed into recycled water.

Further, a stirring rod is used to stir in the closed container to increase the dissolution rate of the treated object in the subcritical liquid water.

A subcritical hydrolysis method, the steps are: placing an object to be processed in a closed container. A steam is injected into the airtight container, so that the airtight container forms a subcritical state and contains a subcritical liquid water and a subcritical water vapor. A heating unit is used to heat the sealed container to maintain the subcritical state. After the object to be processed is dissolved in the subcritical liquid water, the subcritical water vapor is discharged from the closed container.

A subcritical hydrolysis device includes: a sealed container. A heated ring surrounds the closed container. A steam supply unit includes a steam bottle and a valve. The steam bottle is connected to the closed container through the valve.

Further, the airtight container includes a cover body and a barrel body, and the cover body is fixed on the barrel body.

Further, a stirring rod is rotatably disposed on the cover, the stirring rod is placed in the barrel, and the stirring rod is provided with stirring blades inside the barrel.

Further, there is a heat insulation layer covering the outside of the heating ring.

Further, a heat insulation layer is wrapped around the outside of the steam bottle.

According to the above technical characteristics, the following effects can be achieved:

1. Subcritical liquid water treatment materials can be used.

2. Using a heating ring for heating eliminates the need to continuously use an external steam supply unit for heating.

3. Subcritical water vapor can be directly recovered, so that the subcritical liquid water after treatment will not be mixed with the recycled water formed by condensation of subcritical water vapor.

4. Covering the outside of the barrel with an insulation layer can improve the efficiency of the heating ring in heating the barrel.

5. Covering the steam supply unit with an insulation layer can improve the heating efficiency of the steam supply unit.

1: Barrel body

11: Barrel body

12: Barrel side

2: Cover

3: Stirring stick

31: Stirring blade

4: Heating ring

5:Steam supply unit

51:Steam bottle

52:Valve

53:Pipeline

6:Insulation layer

7: Motor

[The first figure] is a schematic plan view of the subcritical hydrolysis device of the present invention.

[The second figure] is a partial cross-sectional schematic diagram of the subcritical hydrolysis device of the present invention.

[The third figure] is a schematic diagram of water vapor entering the barrel from the steam bottle when the subcritical hydrolysis device of the present invention is activated.

[The fourth figure] is a schematic diagram showing that the steam supply unit stops supplying steam when the subcritical hydrolysis device of the present invention is activated.

[Figure 5] is a schematic diagram of water vapor being guided back from the barrel to the steam bottle when the subcritical hydrolysis device of the present invention is activated.

Based on the above technical features, the main functions of the subcritical hydrolysis method and device of the present invention will be clearly demonstrated in the following examples.

Please refer to the first and second figures. The subcritical hydrolysis device of the present invention includes a barrel 1, a cover 2, a stirring rod 3, a heating ring 4, a steam supply unit 5, a heat insulation layer 6 and a Motor 7.

The barrel 1 has a barrel body 11 and a barrel side 12. The cover 2 is arranged on the barrel side 12; the stirring rod 3 passes through the cover 2 and is rotatably arranged on the cover 2. Stretching into the barrel 1, the stirring rod 3 is provided with a stirring blade 31 inside the barrel 1; the heating ring 4 surrounds and is attached to the barrel body 11, and the heat insulation layer 6 covers the heating ring 4. Outside the ring 4; the steam supply unit 5 includes a steam bottle 51 and a pipeline 53 with a valve 52. The steam bottle 51 is connected to the barrel 1 through the pipeline 53, and the heat insulation layer 6 is wrapped around the The steam bottle 51 is connected to the motor 7 and drives the stirring rod 3 .

Please refer to the third and fourth figures, start the steam supply unit 5 to continuously generate water vapor, and introduce the water vapor into the steam bottle 51; fix the cover 2 to the barrel 1, and open the valve 52 Let the water vapor in the steam bottle 51 enter the barrel 1, and at the same time activate the heating ring 4 to heat the barrel 1, so that a subcritical state is formed in the barrel 1 and contains a subcritical liquid water and a subcritical state. water vapor, and after reaching the subcritical state, close the valve 52 and stop the steam supply unit 5 from generating water vapor; continue to use the heating ring 4 to heat the barrel 1 so that the interior of the barrel 1 continues to maintain the subcritical state. State; use the motor to drive the stirring rod 3 and use the stirring blade 31 to stir the subcritical liquid water containing a treated object, thereby accelerating the dissolution rate.

Please refer to the fourth figure. The heat insulation layer 6 is attached to the outside of the heating ring 4 and the steam bottle 51. When using the heating ring 4 and the steam bottle 51, energy loss can be avoided, thereby improving the heating efficiency.

Please refer to Figure 5. After waiting for the treated object to dissolve in the subcritical liquid water, open the valve 52 so that the subcritical water vapor in the barrel 1 will flow back through the pipeline 53 due to the pressure difference. into the steam bottle 51, and further condenses into recycled water in the steam bottle 51, which can prevent the condensed recycled water from mixing with the subcritical liquid water after processing the treated object in the barrel 1; wait After the internal pressure of the barrel 1 is balanced, the subcritical water dissolved in the treated material is then discharged to facilitate subsequent further processing.

Based on the description of the above embodiments, the operation, use and effects of the present invention can be fully understood. However, the above embodiments are only preferred embodiments of the present invention and should not be used to limit the implementation of the present invention. The scope, that is, simple equivalent changes and modifications based on the patent scope of the present invention and the description of the invention, are all within the scope of the present invention.

1: Barrel body

2: Cover

3: Stirring stick

31: Stirring blade

5:Steam supply unit

51:Steam bottle

52:Valve

53:Pipeline

6:Insulation layer

7: Motor

Claims (8)

A subcritical hydrolysis method includes the following steps: placing an object to be processed in a closed container, which is connected to a steam bottle of a steam supply unit through a pipeline with a valve; the steam supply unit generates a steam bottle in the steam bottle water vapor, and introduce the water vapor into the airtight container through the pipeline, so that the airtight container forms a subcritical state and contains a subcritical liquid water and a subcritical water vapor, and after reaching the subcritical state, close the valve, and prevent the steam supply unit from generating the water vapor in the steam bottle; wrap a heating ring around the periphery of the airtight container, and use the heating ring to heat the airtight container to maintain the airtight container in the subcritical state state; after the object to be processed is dissolved in the subcritical liquid water, the valve is opened, and the pressure difference is used through the pipeline to cause the subcritical water vapor in the closed container to flow back to the steam bottle, where it is cooled and condensed into recycled water. The subcritical hydrolysis method of claim 1, wherein a stirring rod is used to stir in the sealed container to increase the dissolution rate of the treated substance in the subcritical liquid water. A subcritical hydrolysis device, including: a closed container; a heating ring surrounding the closed container; a steam supply unit including a steam bottle and a pipeline with a valve, the steam bottle is connected to the closed container through the pipeline Container; place an object to be processed in the closed container, and the steam supply unit introduces water vapor into the closed container through the pipeline, so that the closed container forms a subcritical state and contains a subcritical liquid water and a subcritical water. steam, and then close the valve so that the steam supply unit no longer generates the water vapor, and use The heating ring heats the airtight container to maintain the subcritical state. After the object to be processed is dissolved in the subcritical liquid water, the valve is opened to allow the airtight container to use the pressure difference to evaporate the subcritical water vapor through the pipeline. Return to the steam supply unit. The subcritical hydrolysis device of claim 3, wherein the sealed container includes a lid and a barrel, and the lid is fixed on the barrel. The subcritical hydrolysis device of claim 3, wherein a stirring rod is rotatably installed on the cover, the stirring rod is placed in the barrel, and the stirring rod is provided with stirring blades inside the barrel. The subcritical hydrolysis device of claim 3, wherein a heat insulation layer covers the outside of the heating ring. The subcritical hydrolysis device of claim 3, wherein a heat insulation layer covers the outside of the steam bottle. A subcritical hydrolysis method of the subcritical hydrolysis device as described in any one of claims 3 to 7, including the following steps: placing a processed object in the airtight container; the steam supply unit injects water vapor into the airtight container, The closed container is brought into a subcritical state and contains a subcritical liquid water and a subcritical water vapor; the valve is closed so that the steam supply unit no longer generates the water vapor, and the heating ring is used to heat the closed container. It maintains the subcritical state; after the treated object is dissolved in the subcritical liquid water, the valve is opened to allow the sealed container to use the pressure difference to return the subcritical water vapor to the steam supply unit through the pipeline.

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