Deslagging device for continuous furfural production

Abstract

The utility model aims to provide a deslagging device for continuous furfural production, which belongs to the technical field of furfural production and comprises a cylinder barrel, a piston moving along the cylinder barrel is arranged in the cylinder barrel, one end of the piston is connected with an oil cylinder through a connecting rod, a limiter is arranged on the connecting rod, and a travel switch is arranged at the top end of one side, close to the oil cylinder, of the cylinder barrel. A feeding port is formed in the top end of the side, away from the oil cylinder, of the cylinder barrel, and a slag discharging port is formed in the end of the cylinder barrel. According to the utility model, the steam pressure in a 1MPa system can be sealed, and residues in the reactor can be continuously and regularly discharged, so that the feeding and the residue discharging in the continuous hydrolysis system are balanced.

Description

Technical Field

[0001] The utility model belongs to the technical field of furfural production, and particularly relates to a slag discharging device for continuous furfural production. Background Technique

[0002] Furfural is a chemical organic compound, which is mainly produced by acid hydrolysis of pentosan to form pentose, and then dehydration cyclization. At present, the main raw materials for furfural production are crops such as corncobs. Its chemical properties are active and there are many derivatives, which can be widely used in medicine, plastics or agriculture. At the same time, the use of corncobs, a kind of crop "waste", is effective for environmental protection. In the furfural production process, a hydrolysis kettle is used as a storage device for raw material reaction.

[0003] At present, the furfural production and hydrolysis process in China is the most important part of furfural production. A relatively typical hydrolysis process flow is the intermittent series hydrolysis process commonly used at present. After years of development, only the hydrolysis kettle has been enlarged, and there are many disadvantages in the intermittent process: filling - boosting - hydrolysis - emptying, and the production process has been circulating like this.

[0004] Generally, a stirring mechanism is arranged inside the hydrolysis kettle. When discharging, only the materials inside the kettle body need to be pushed to the discharge port and the discharge cover is opened for discharging. However, during this process, a large amount of residue will adhere to the inner wall of the kettle body after the materials are hydrolyzed, the slag discharging is incomplete and it is inconvenient to clean, and the slag discharging efficiency is low. Content of the Utility Model

[0005] The purpose of the utility model is to provide a slag discharging device for continuous furfural production.

[0006] The utility model adopts the following technical scheme:

[0007] A slag discharging device for continuous furfural production includes a cylinder barrel. A piston moving along the cylinder barrel is arranged inside the cylinder barrel. One end of the piston is connected with an oil cylinder through a connecting rod. A limiter is arranged on the connecting rod. A travel switch is arranged at the top end of the cylinder barrel close to the oil cylinder. The limiter passes through the travel switch. A feed port is arranged at the top end of the cylinder barrel far from the oil cylinder. A slag discharging port is arranged at the end of the cylinder barrel far from the oil cylinder.

[0008] Further, a sealing section is arranged in the middle of the cylinder barrel.

[0009] Further, an exhaust port is arranged at the top end of the cylinder barrel close to the sealing section, and the exhaust port is close to the slag discharging port side.

[0010] Further, the connecting rod and the piston are connected through a fixing frame.

[0011] Further, a hydraulic oil station for providing power is arranged at one end of the oil cylinder.

[0012] The beneficial effects of the present utility model are as follows:

[0013] 1. By using the present utility model, it can not only seal the steam pressure in the 1 MPa system, but also continuously and regularly drain the residue in the hydrolysis reactor, so that the feeding and slag discharging in the continuous hydrolysis system reach a balance.

[0014] 2. By providing an exhaust port in the present utility model, when the piston returns, the gas is discharged to the waste gas treatment, which can prevent damage to the seal.

[0015] 3. The slag discharging device of the present utility model is more stable compared with the conventional auger and extrusion. Description of the Drawings

[0016] Figure 1 is a schematic structural diagram of the present utility model;

[0017] Wherein: 1 - cylinder barrel; 2 - piston; 3 - connecting rod; 4 - oil cylinder; 5 - limiter; 6 - travel switch; 7 - feed inlet; 8 - slag discharge port; 9 - sealing section; 10 - exhaust port; 11 - fixing bracket. Detailed Embodiment

[0018] In combination with the drawings, the present utility model will be further described.

[0019] As shown in the figure, a slag discharging device for continuous furfural production includes a cylinder barrel 1. A piston 2 that moves along the cylinder barrel 1 is arranged inside the cylinder barrel 1. One end of the piston 2 is connected to an oil cylinder 4 through a connecting rod 3. A limiter 5 is arranged on the connecting rod 3. A travel switch 6 is arranged at the top of one side of the cylinder barrel 1 close to the oil cylinder 4. The limiter 5 passes through the travel switch 6. A feed inlet 7 is arranged at the top of the other side of the cylinder barrel 1 away from the oil cylinder 4. A slag discharge port 8 is arranged at the end of the cylinder barrel 1 away from the oil cylinder 4.

[0020] Further, a sealing section 9 is arranged in the middle of the cylinder barrel 1.

[0021] Further, an exhaust port 10 is arranged at the top of the cylinder barrel 1 close to the sealing section 9, and the exhaust port 10 is on the side close to the slag discharge port 8.

[0022] Further, the connecting rod 3 and the piston 2 are connected through a fixing bracket 11.

[0023] Further, a hydraulic oil station for providing power is arranged at one end of the oil cylinder 4.

[0024] The utility model relates to the main equipment in the hydrolysis process of continuous furfural production. Furfural production involves pulverizing corncobs and mixing them with dilute sulfuric acid. The acid is corrosive, and in addition, there is high temperature, 180°C - 200°C, and high pressure of 0.8 - 0.9 MPa. Therefore, corrosion-resistant materials, such as stainless steel 316L (316L stainless steel is used for easily worn parts, and hard stainless steel 321 is used for cylinder barrels and pistons), are required to meet the long-term operation of the equipment.

[0025] To solve the main hydrolysis part in the continuous furfural production process, the discharging time is set to 2 minutes - 10 minutes, and the amount of slag discharged each time is about 100 kg without blockage, which is convenient for recovery control.

[0026] This utility model is an important part in the continuous hydrolysis process and automatic control. According to the set discharging time and amount once, the material balance in the hydrolyzer is maintained.

[0027] The supporting hydraulic oil station is the power source, which delivers power to the oil cylinder (the reciprocating stroke is controlled by the travel switch and guided);

[0028] The oil cylinder - connecting rod - piston are connected internally;

[0029] The oil cylinder - stroke section - sealing section - cylinder barrel are connected externally;

[0030] An exhaust port is designed at the connection between the cylinder barrel and the sealing section. When the piston returns, the gas is discharged to the waste gas treatment to prevent damage to the seal;

[0031] The feed port is connected and matched with the hydrolysis system;

[0032] The slag discharge port is connected and matched with the slag collector.

[0033] The device of this utility model can not only seal the steam pressure in the 1 MPa system, but also continuously and regularly drain the residue in the hydrolysis reactor. By using the pressure difference between the hydrolysis reactor and the buffer tank, the slag can be discharged stably. It has certain advantages and stability compared with the screw conveyor and extrusion, and the automatic control is stable.

[0034] The above describes the utility model and its implementation manners. Such description is not restrictive, and what is shown in the drawings is only one of the implementation manners of the utility model. The actual structure is not limited to this. Generally speaking, if those of ordinary skill in the art are inspired by it and design similar structural manners and embodiments without creative work without departing from the creative purpose of the utility model, they should all fall within the protection scope of the utility model.

Claims

1. A slag discharging device for continuous furfural production, characterized in that: It includes a cylinder barrel (1), a piston (2) moving along the cylinder barrel (1) is arranged inside the cylinder barrel (1), one end of the piston (2) is connected with an oil cylinder (4) through a connecting rod (3), a stopper (5) is arranged on the connecting rod (3), a travel switch (6) is arranged at the top end of the cylinder barrel (1) on the side close to the oil cylinder (4), the stopper (5) passes through the travel switch (6), a feed inlet (7) is arranged at the top end of the cylinder barrel (1) on the side far from the oil cylinder (4), and a slag discharge port (8) is arranged at the end of the cylinder barrel (1) far from the oil cylinder (4).

2. The slag discharging device for continuous furfural production according to claim 1, wherein: A sealing section (9) is arranged in the middle of the cylinder barrel (1).

3. The slag discharging device for continuous furfural production according to claim 2, characterized in that: An exhaust port (10) is arranged at the top end of the cylinder barrel (1) close to the sealing section (9), and the exhaust port (10) is on the side close to the slag discharge port (8).

4. A slag discharging device for continuous furfural production according to claim 1, characterized in that: The connecting rod (3) and the piston (2) are connected through a fixing frame (11).

5. A slag discharging device for continuous furfural production according to claim 1, characterized in that: One end of the oil cylinder (4) is provided with a hydraulic oil station for providing power.

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