WO2012135980A1

WO2012135980A1 - Continuous hydrolysis kettle

Info

Publication number: WO2012135980A1
Application number: PCT/CN2011/000677
Authority: WO
Inventors: 柏绪桐
Original assignee: 山东万盛环保科技发展有限公司
Priority date: 2011-04-02
Filing date: 2011-04-18
Publication date: 2012-10-11

Abstract

Provided is a continuous hydrolysis kettle, which comprises a cylinder (5) and an internal lining (11). The cylinder (5) is provided with a feed inlet (1) and an aldehyde steam outlet (4) on the top, and with a slag-discharging outlet (3) and a steam pipe (9) at the bottom. A feed control unit (7) and a slag-discharging electric valve (10) are arranged at the feed inlet (1) and the slag-discharging outlet (3) respectively. The continuous hydrolysis kettle can achieve automatic continuous feeding and slag-discharging.

Description

Continuous hydrolysis kettle

TECHNICAL FIELD The present invention relates to the field of furfural production, and more particularly to a continuous hydrolysis kettle. BACKGROUND OF THE INVENTION - Hydrolysis kettles are widely used in the furfural production industry, and are the main equipment. The conventional hydrolyzers are used to fill up the raw materials once, and the intermittent hydrolysis operation mode of discharging the residue once after the completion of the reaction,

There are some shortcomings in this mode of operation: First, the large slag displacement requires the construction of a very large silo. The commonly used method is to build a large house-type silo for the storage of furfural slag, which not only covers a large area, but also costs. High, and not conducive to subsequent processing and environmental protection. Secondly, the space above the raw material in the intermittent hydrolysis cylinder is large, and the hot steam is discharged together when the slag is discharged, which causes waste of heat energy; it also needs to be emptied, otherwise the oxygen and carbon dioxide in the air entering the cylinder may have side effects. Thirdly, the production process of intermittent hydrolysis must be carried out by adding an external acid as a catalyst, and the aqueous acid solution is mixed at a high temperature, and even a highly corrosion-resistant alloy steel is severely corroded, and the production cost is high. In addition, bagasse is a commonly used raw material in the production of furfural. The cane pulp in bagasse has a high aldehyde content, but the cane pulp is easy to cause compaction and slag discharge in the hydrolysis kettle, and it is easy to puff the hydrolyzed kettle. Can only discard the cane pulp, but simply use bagasse production. For the above problems, there is currently no good solution. ― Summary of the Invention The object of the present invention is to provide a continuous hydrolysis kettle. Firstly, the hydrolysis kettle can continuously feed and slag continuously, has less slag discharge, does not need to be emptied, does not enter cold air, reduces production cost, and is convenient to use. Secondly, the continuous hydrolysis reactor of the present invention can utilize the acetic acid produced by the hydrolysis process itself, without Add acid.

The technical solution adopted by the present invention to solve the technical problem is as follows: a continuous hydrolysis kettle comprising a cylinder and a lining disposed in the cylinder body, the top of the cylinder body is provided with a charging port and an aldehyde vapor outlet, and the bottom is provided with a slag discharge port and steam The pipe is characterized in that: the charging port is connected with a passage extending into the inside of the cylinder, the passage is provided with a hydraulic gate valve, the hydraulic gate valve comprises an upper valve and a lower valve, and the hydraulic gate valve and the inlet The material control unit is connected; the slag discharge port is provided with a slag discharge electric valve, and a valve opening sensor and a valve closing sensor are arranged side by side on the side wall of the cylinder body, and the 'opening valve sensor and the widening sensor are both Connected to the slag electric valve. The cylinder body is provided with a stirring device, the stirring device comprises a support frame, a central shaft and a driving motor; the supporting frame is arranged in the cylinder body, one end of the central shaft is supported by the supporting frame, and the other end is driven by the driving motor The output shafts are connected, and the center shaft is provided with anti-shake support in the middle, and the center shaft is provided with a plurality of sets of stirring blades.

A gas pressure balance pipe connecting the two is disposed on the passage between the steam pipe and the upper valve and the lower valve, and a gas pressure balance valve is disposed on the gas pressure balance pipe, and the gas pressure balance is widely linked with the lower jaw.

The steam pipe is an annular pipe, and the steam pipe is uniformly distributed with a plurality of open steam pipes, the bottom end of the steam pipe is connected to the steam pipe, and the steam pipe and the steam inlet located outside the cylinder The same.

The top of the cylinder is also provided with a pressure gauge interface and a safety valve interface.

The inner liner is made of an acid resistant material.

The cylinder body is provided with a fixing seat.

The fixing seat is a ear seat.

The cylinder is a pressure vessel.

The continuous hydrolysis kettle of the present invention has the following outstanding advantages compared with the prior art:

1. Control the hydraulic gate valve through the feed control unit to complete the feed, through the sensor and slagging electric The valve cooperates with the control of slag discharge, which can continuously feed and discharge slag. As the slag discharge is small, it is no longer necessary to build a huge silo, reduce the floor space and reduce the investment cost.

2. Continuous hydrolysis does not enter cold air, and does not need to be emptied, effectively avoiding waste of heat energy and improving production efficiency.

3. In the continuous hydrolysis kettle, the input amount of steam is relatively fixed. The hydrolysis kettle can adopt the method of "self-generated acid catalyzed hydrolysis", using acetic acid, formic acid and a small amount of other carboxylic acid produced by itself as a catalyst, without external acid. Significantly reduced corrosion and production costs.

4. It is equipped with a stirring device to prevent the raw material from squashing and clogging the hydrolysis kettle to avoid slag discharge. The cane pulp with relatively high aldehyde content can be fully utilized, the utilization rate of raw materials is greatly increased, and the efficiency is improved. Easy to use and other features.

5. Continuously automated feeding, slagging, and slag discharge acid content is relatively reduced, reducing environmental pollution and making it more environmentally friendly.

DRAWINGS

Figure 1 is a schematic structural view of the present invention;

Figure 2 is a top plan view of the steam tube of Figure 1.

In the figure: 1 loading port, 2 steam inlet, 3 rows of slag port, 4 aldehyde vapor outlet, 5 cylinder, 61 upper valve, 62 lower valve, 7 feeding control unit, 81 open valve sensor, 82 closed valve sensor, 9 steam pipe, 10 row slag electric valve, 11 lining, 12 safety valve interface, 13 pressure gauge interface, 14 fixed seat, 15 air pressure balance pipe, 16 air pressure balance valve, 17 support frame, 18 mixing blades, 19 center shaft, 20 drive motor, 21 + anti-jitter support.

detailed description

The present invention will be further described below with reference to the accompanying drawings 1 and 2:

The continuous hydrolysis kettle of the present invention comprises a cylinder 5 and an inner liner 11 disposed in the cylinder 5. The top of the cylinder 5 is provided with a charging port 1 and an aldehyde vapor outlet 4, and the bottom is provided with a slag discharge port 3 and a steam pipe 9. , the loading port 1 is connected to a passage extending into the inside of the cylinder 5, the passage is provided with a hydraulic gate valve, the hydraulic shutter comprises an upper valve 61 and a lower valve 62, and the hydraulic shutter valve is connected with a feeding control unit 7; The slag discharge port 3 is provided with a slag discharge electric valve 10, and on the side wall of the cylinder 5, a valve opening sensor 81 and a valve closing sensor 82 are arranged side by side from the top to the bottom, and the valve opening sensor 81 and the valve closing sensor 82 are both The slagging electric valve 10 is connected.

The cylinder 5 is provided with a stirring device, and the stirring device comprises a support frame 17, a central shaft 19 and a driving motor 20; the support frame 17 is disposed in the cylinder 5, and one end of the central shaft 19 is supported by the support frame The other end is connected to the power output shaft of the drive motor 20, and the center shaft 19 is provided with an anti-shake support 21 in the middle thereof, and the center shaft 19 is provided with a plurality of sets of agitating blades 18. When the stirring device is in operation, the power output shaft of the driving motor 20 drives the central shaft 19 to rotate, and the stirring blade 18 completes the work of stirring the raw material, and the motor reducer can be added between the driving motor 20 and the central shaft 19. The stirring device can effectively prevent the raw material slabs and slag from being cleaned, and can prevent the cane pulp from clogging the hydrolysis kettle, so that the cane pulp can be effectively utilized. ,

The passage between the steam pipe 9 and the upper valve 61 and the lower valve 62 is provided with a gas pressure balance connecting the two. The pipe 15 is provided with a gas pressure balance valve 16 on the gas pressure balance pipe 15, and the gas pressure balance valve 16 is interlocked with the lower valve 62. The device is capable of balancing the air pressure in the interior of the cylinder 5 and the passage above the lower valve 62 to ensure smooth and smooth feed. .

The steam pipe 9 is an annular pipe, and the steam pipe 9 is evenly distributed with a plurality of open steam pipes, the bottom end of the steam pipe is connected with the steam pipe 9; the steam pipe 9 is located at the cylinder 5 The external steam inlet 2 is in communication. The steam pipe 9 is provided with a steam dividing pipe to enable the raw material at the bottom of the cylinder 5 to be sufficiently hydrolyzed to increase the aldehyde yield. ·

The top of the cylinder 5 is also provided with a pressure gauge interface 13 and a safety valve interface 12. Access to pressure gauges and safety valves increases the safety of the equipment.

The inner liner 11 is made of an acid resistant material. Commonly used acid-resistant materials are acid-resistant bricks and acid-resistant cements. The cylinder 5 is provided with a fixing seat 14.

The fixing seat 14 is a lug seat.

The cylinder 5 is a pressure vessel.

The feed control unit 7 can adopt the time control mode of the existing numerical control system. When the feed valve 61 is opened and the lower valve 62 is closed, the raw material enters the passage below the charging port 1 and the upper valve 61 is closed, the lower valve 62 is opened, and the raw material is slowly lowered into the cylinder 5 by gravity. The steam enters the steam pipe 9 from the steam inlet 2, and enters the cylinder 5 uniformly through the steam distribution pipe to start the reaction with the raw material. When the height of the raw material in the cylinder 5 is higher than the valve opening sensor 81 during the continuous feeding process, the valve opening sensor 81 sends a signal to the slag discharging electric valve 10, and the slag discharging electric valve 10 is opened for slag discharging; when the cylinder 5 is inside When the material height is lower than the valve closing sensor 82, the valve closing sensor 82 sends a signal to the slag discharging electric valve 10, and the slag discharging electric valve 10 is closed to stop the slag discharging.

In addition to the technical features described in the specification, the remaining technical features are known to those skilled in the art. The above description is merely illustrative of some of the principles of the present invention, and the description is not intended to limit the invention to the specific structure and It belongs to the patent scope of the present invention.

Claims

Claim

1. A continuous hydrolysis kettle comprising a cylinder and a lining disposed in the cylinder, a top of the cylinder is provided with a gargle and an aldehyde vapor outlet, and a bottom is provided with a slag discharge port and a steam pipe, wherein the charging port is Connecting a passage extending into the interior of the cylinder, the passage is provided with a hydraulic gate valve, the hydraulic gate valve comprises an upper valve and a lower valve, and the hydraulic gate valve is connected with a feeding control unit; There is a slag discharge electric valve. On the side wall of the cylinder, a wide sensor and a valve closing sensor are arranged side by side from top to bottom, and the valve opening sensor and the closing valve sensor are connected with the slag discharging electric valve.

2. The continuous hydrolysis kettle according to claim 1, wherein the cylinder body is provided with a stirring device, the stirring device comprises a support frame, a central shaft and a driving motor; and the supporting frame is arranged in the cylinder body. One end of the central shaft is supported by the support frame, and the other end is connected with the power output shaft of the drive motor. The central part of the center shaft is provided with anti-jitter support, and the center shaft is provided with a plurality of sets of stirring blades.

The continuous hydrolysis kettle according to claim 1 or 2, wherein the passage between the steam pipe and the upper valve and the lower valve is provided with a gas pressure balance pipe connecting the two, and the air pressure balance pipe A pneumatic balance valve is disposed thereon, and the pneumatic balance valve is interlocked with the lower valve.

4. The continuous hydrolysis kettle according to claim 3, wherein the steam pipe is an annular pipe, and the steam pipe is evenly distributed with a plurality of open steam pipes, and the bottom end of the steam pipe is The steam pipes are in communication, and the steam pipes are in communication with a steam inlet located outside the cylinder.

5. The continuous hydrolysis kettle according to claim 1, wherein the top of the cylinder is further provided with a pressure gauge interface and a safety valve interface.

6. The continuous hydrolysis kettle of claim 1 wherein said liner is made of an acid resistant material.

7. The continuous hydrolysis kettle according to claim 1, wherein said cylinder is provided with a fixing seat.

8. A continuous hydrolysis kettle according to claim 7 wherein said holder is a lug.

9. The continuous hydrolysis kettle of claim 1 wherein said barrel is a pressure vessel.