阅读说明：本技术 一种高效节能制备3-羟基丙酸的反应釜 (Energy-efficient reation kettle of preparing 3-hydroxypropionic acid ) 是由 王陶 李文 董玉玮 杨英歌 张传丽 于 2021-09-28 设计创作，主要内容包括：本发明公开一种高效节能制备3-羟基丙酸的反应釜,包括釜体、支架、搅拌机构、换热盘管、备料机构和过滤机构；釜体底面与支架固定连接；备料机构设置于釜体外侧面中部；过滤机构设置于釜体内腔底部；换热盘管为螺旋管状结构；换热盘管进口端和出口端分别贯穿釜体外侧面；换热盘管的换热部设置于釜体内腔中部；搅拌机构包括搅拌电机和搅拌组件；搅拌电机固定安装于釜体顶面；搅拌组件顶端与搅拌电机传动连接,搅拌组件底端设置于换热盘管的换热部内；釜体外侧面固定安装有测温组件；釜体顶面开设有进料口；进料口与备料机构相连通；本发明实现了3-羟基丙酸的高效节能的制备。(The invention discloses a reaction kettle for preparing 3-hydroxypropionic acid with high efficiency and energy saving, which comprises a kettle body, a bracket, a stirring mechanism, a heat exchange coil, a material preparation mechanism and a filtering mechanism, wherein the kettle body is provided with a stirring mechanism; the bottom surface of the kettle body is fixedly connected with the bracket; the material preparing mechanism is arranged in the middle of the outer side surface of the kettle body; the filtering mechanism is arranged at the bottom of the inner cavity of the kettle body; the heat exchange coil is of a spiral tubular structure; the inlet end and the outlet end of the heat exchange coil pipe respectively penetrate through the outer side surface of the kettle body; the heat exchange part of the heat exchange coil is arranged in the middle of the inner cavity of the kettle body; the stirring mechanism comprises a stirring motor and a stirring component; the stirring motor is fixedly arranged on the top surface of the kettle body; the top end of the stirring component is in transmission connection with a stirring motor, and the bottom end of the stirring component is arranged in the heat exchange part of the heat exchange coil; a temperature measuring component is fixedly arranged on the outer side surface of the kettle body; a feed inlet is formed in the top surface of the kettle body; the feed inlet is communicated with the material preparation mechanism; the invention realizes the high-efficiency and energy-saving preparation of the 3-hydroxypropionic acid.)

1. The reaction kettle for preparing 3-hydroxypropionic acid with high efficiency and energy saving is characterized by comprising a kettle body (1), a support (2), a stirring mechanism (3), a heat exchange coil (4), a material preparation mechanism (5) and a filtering mechanism (6); the bottom surface of the kettle body (1) is fixedly connected with the bracket (2); the material preparing mechanism (5) is arranged in the middle of the outer side surface of the kettle body (1); the filtering mechanism (6) is arranged at the bottom of the inner cavity of the kettle body (1);

the heat exchange coil (4) is of a spiral tubular structure; the inlet end and the outlet end of the heat exchange coil (4) respectively penetrate through the outer side surface of the kettle body (1); the heat exchange part of the heat exchange coil (4) is arranged in the middle of the inner cavity of the kettle body (1);

the stirring mechanism (3) comprises a stirring motor (31) and a stirring component; the stirring motor (31) is fixedly arranged on the top surface of the kettle body (1); the top end of the stirring component is in transmission connection with the stirring motor (31), and the bottom end of the stirring component is arranged in the heat exchange part of the heat exchange coil (4); a temperature measuring component (8) is fixedly arranged on the outer side surface of the kettle body (1); a feed inlet is formed in the top surface of the kettle body (1); the feed inlet is communicated with the material preparing mechanism (5);

the temperature measuring component (8) and the heat exchange coil (4) are respectively arranged above the filtering mechanism (6).

2. The reaction kettle for preparing 3-hydroxypropionic acid with high efficiency and energy saving according to claim 1, is characterized in that: the material preparing mechanism (5) comprises an annular shell (51); the inner wall of the annular shell (51) is fixedly connected with the outer side surface of the kettle body (1); the top of the side surface of the annular shell (51) is fixedly connected and communicated with a feeding pipe (52); the bottom of the side surface of the annular shell (51) is fixedly connected and communicated with a discharge pipe (53); a control valve (54) is arranged on the discharge pipe (53); the discharge pipe (53) is fixedly connected and communicated with the feed inlet.

3. The reaction kettle for preparing 3-hydroxypropionic acid with high efficiency and energy saving according to claim 1, is characterized in that: the stirring component comprises a stirring rod (32) and a plurality of blades (33); the blades (33) are horizontally and fixedly connected to the bottom end of the stirring rod (32) and are arranged in the heat exchange part of the heat exchange coil (4); the top end of the stirring rod (32) penetrates through the top surface of the kettle body (1) and is in transmission connection with the stirring motor (31).

4. The reaction kettle for preparing 3-hydroxypropionic acid with high efficiency and energy saving according to claim 1, is characterized in that: the filter mechanism (6) comprises a filter disc (61); a plurality of through grooves are formed in the top surface of the filter disc (61) at equal intervals in the circumferential direction; an ultrafiltration membrane (62) is fixedly arranged in the through groove; the side surface of the filter disc (61) is in sliding connection with the side wall of the inner cavity of the kettle body (1), and a water leakage disc (63) is attached to the bottom surface of the filter disc (61); the side surface of the water leakage disc (63) is fixedly connected with the side wall of the inner cavity of the kettle body (1); an output assembly is fixedly connected to the center of the filter disc (61); the bottom end of the output assembly penetrates through the water leakage disc (63) and the bottom surface of the kettle body (1) in sequence.

5. The reaction kettle for preparing 3-hydroxypropionic acid with high efficiency and energy saving according to claim 4, is characterized in that: the output assembly comprises a rotating shaft (64) and a material conveying pipe (65); the top end of the rotating shaft (64) penetrates through the water leakage disc (63) and is fixedly connected with the center of the filter disc (61); the bottom end of the rotating shaft (64) is in sliding connection with the inner cavity of the material conveying pipe (65); the bottom end of the rotating shaft (64) is connected with a switching motor (66) which is fixedly connected with the inner cavity of the material conveying pipe (65) in a transmission way; a plurality of water inlet holes (67) are formed in the side surface of the material conveying pipe (65); and a water outlet valve (68) is arranged on the material conveying pipe (65).

6. The reaction kettle for preparing 3-hydroxypropionic acid with high efficiency and energy saving according to claim 4, is characterized in that: a plurality of water leakage grooves (7) are formed in the top surface of the water leakage disc (63) at equal intervals in the circumferential direction; the water leakage groove (7) is arranged corresponding to the through groove.

7. The reaction kettle for preparing 3-hydroxypropionic acid with high efficiency and energy saving according to claim 1, is characterized in that: the temperature measuring component (8) comprises a thermometer (81) and a temperature measuring head (82); the thermometer (81) is fixedly connected with the temperature measuring head (82) and is electrically connected with the temperature measuring head; one end of the temperature measuring head (82) penetrates through the side face of the kettle body (1) and is arranged in the inner cavity of the kettle body (1).

8. The reaction kettle for preparing 3-hydroxypropionic acid with high efficiency and energy conservation according to claim 2, is characterized in that: and the outer side surface of the annular shell (51) and the outer side surface of the kettle body (1) are respectively provided with a heat insulation layer.

9. The reaction kettle for preparing 3-hydroxypropionic acid with high efficiency and energy saving according to claim 1, is characterized in that: the bottom surface of the kettle body (1) is arranged in a funnel shape.

10. The reaction kettle for preparing 3-hydroxypropionic acid with high efficiency and energy saving according to claim 1, is characterized in that: the support (2) comprises a plurality of support legs; one end of the supporting leg is fixedly connected with the bottom surface of the kettle body (1), and the other end of the supporting leg is arranged on the ground.

Technical Field

The invention relates to the field of biochemistry, in particular to a reaction kettle for preparing 3-hydroxypropionic acid with high efficiency and energy saving.

Background

3-hydroxypropionic acid (abbreviated as 3-HP) is an achiral organic acid having three carbon atoms, has an acid dissociation constant (pKa) of 4.5, is in liquid state, is viscous, colorless, odorless, and soluble in water, ethanol and diethyl ether. Can be used for synthesizing various chemicals such as acrylic acid and the like.

It can be seen that 3-HP plays a very important role in modern industrial applications, but chemical synthesis is often accompanied by problems of high pollution and high energy consumption. Therefore, a debaryomyces hansenii strain and a method for preparing 3-hydroxypropionic acid by fermenting the debaryomyces hansenii strain (Chinese patent No. 201610238663.6) provide a microbial synthesis method, which solves the problems of high pollution and high energy consumption caused by using non-renewable resources in the traditional method, but although the method is already proposed, no corresponding device is provided for efficiently and energy-saving preparation of 3-hydroxypropionic acid, so that a reaction kettle for efficiently and energy-saving preparation of 3-hydroxypropionic acid is urgently needed to solve the problems.

Disclosure of Invention

The invention aims to provide a reaction kettle for preparing 3-hydroxypropionic acid with high efficiency and energy saving, which solves the problems in the prior art and realizes the high-efficiency and energy-saving preparation of 3-hydroxypropionic acid.

In order to achieve the purpose, the invention provides the following scheme:

the invention provides a reaction kettle for preparing 3-hydroxypropionic acid with high efficiency and energy saving, which comprises a kettle body, a bracket, a stirring mechanism, a heat exchange coil, a material preparation mechanism and a filtering mechanism, wherein the kettle body is provided with a reaction kettle body; the bottom surface of the kettle body is fixedly connected with the bracket; the material preparing mechanism is arranged in the middle of the outer side surface of the kettle body; the filtering mechanism is arranged at the bottom of the inner cavity of the kettle body;

the heat exchange coil is of a spiral tubular structure; the inlet end and the outlet end of the heat exchange coil respectively penetrate through the outer side surface of the kettle body; the heat exchange part of the heat exchange coil is arranged in the middle of the inner cavity of the kettle body;

the stirring mechanism comprises a stirring motor and a stirring component; the stirring motor is fixedly arranged on the top surface of the kettle body; the top end of the stirring component is in transmission connection with the stirring motor, and the bottom end of the stirring component is arranged in the heat exchange part of the heat exchange coil; a temperature measuring component is fixedly arranged on the outer side surface of the kettle body; a feed inlet is formed in the top surface of the kettle body; the feed inlet is communicated with the material preparing mechanism;

the temperature measuring component and the heat exchange coil are respectively arranged above the filtering mechanism.

Preferably, the material preparation mechanism comprises an annular shell; the inner wall of the annular shell is fixedly connected with the outer side surface of the kettle body; the top of the side surface of the annular shell is fixedly connected and communicated with a feeding pipe; the bottom of the side surface of the annular shell is fixedly connected and communicated with a discharge pipe; a control valve is arranged on the discharge pipe; the discharge pipe is fixedly connected and communicated with the feed inlet.

Preferably, the stirring assembly comprises a stirring rod and a plurality of blades; the blades are horizontally and fixedly connected to the bottom end of the stirring rod and arranged in the heat exchange part of the heat exchange coil; the top end of the stirring rod penetrates through the top surface of the kettle body and is in transmission connection with the stirring motor.

Preferably, the filter mechanism comprises a filter disc; a plurality of through grooves are formed in the top surface of the filter disc at equal intervals in the circumferential direction; an ultrafiltration membrane is fixedly arranged in the through groove; the side surface of the filter disc is in sliding connection with the side wall of the inner cavity of the kettle body, and the bottom surface of the filter disc is attached with a water leakage disc; the side surface of the water leakage disc is fixedly connected with the side wall of the inner cavity of the kettle body; an output assembly is fixedly connected to the center of the filter disc; the bottom end of the output assembly penetrates through the water leakage disc and the bottom surface of the kettle body in sequence.

Preferably, the output assembly comprises a rotating shaft and a conveying pipeline; the top end of the rotating shaft penetrates through the water leakage disc and is fixedly connected with the center of the filter disc; the bottom end of the rotating shaft is connected with the inner cavity of the conveying pipe in a sliding manner; the bottom end of the rotating shaft is in transmission connection with a switching motor fixedly connected with the inner cavity of the material conveying pipe; a plurality of water inlet holes are formed in the side surface of the material conveying pipe; and a water outlet valve is arranged on the material conveying pipe.

Preferably, a plurality of water leakage grooves are formed in the top surface of the water leakage disc at equal intervals in the circumferential direction; the water leakage groove is arranged corresponding to the through groove.

Preferably, the temperature measuring component comprises a thermometer and a temperature measuring head; the thermometer is fixedly connected with the temperature measuring head and is electrically connected with the temperature measuring head; one end of the temperature measuring head penetrates through the side face of the kettle body and is arranged in the inner cavity of the kettle body.

Preferably, the outer side surface of the annular shell and the outer side surface of the kettle body are respectively provided with a heat insulation layer.

Preferably, the bottom surface of the kettle body is arranged in a funnel shape.

Preferably, the support comprises a plurality of legs; and one end of the supporting leg is fixedly connected with the bottom surface of the kettle body, and the other end of the supporting leg is arranged on the ground.

The invention discloses the following technical effects:

the invention preheats and prepares materials for the next reaction in the kettle body through the material preparation mechanism, thereby reducing the preheating time and improving the reaction efficiency. Meanwhile, the heat of the heat exchange coil is fully utilized, and the utilization efficiency of energy is improved.

Waste steam is introduced into the heat exchange coil pipe, and the characteristic of low temperature of the waste steam is fully utilized, so that the microorganism is prevented from being burnt by high temperature, the waste heat of the waste steam can be fully utilized, and the temperature rise of reaction raw materials is completed.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive exercise.

Fig. 1 is a schematic front and top view of the present invention.

FIG. 2 is a schematic sectional view of A-A in FIG. 1.

Fig. 3 is a schematic top view of the filter tray.

Fig. 4 is a schematic top view of the water leakage plate.

Fig. 5 is a schematic front view of the structure of embodiment 2.

FIG. 6 is a schematic top view and a schematic cross-sectional view of B-B in example 3.

Fig. 7 is an enlarged schematic view of the structure at C in fig. 6.

FIG. 8 is a schematic side view of the structure of embodiment 4.

Wherein, 1-kettle body; 2-a scaffold; 3-a stirring mechanism; 31-a stirring motor; 32-a stirring rod; 33-a paddle; 4-heat exchange coil pipe; 5-a material preparation mechanism; 51-an annular housing; 52-feed pipe; 53-a discharge pipe; 54-a control valve; 6-a filtering mechanism; 61-a filter disc; 62-ultrafiltration membrane; 63-a water leakage disc; 64-a rotation axis; 65-a feed delivery pipe; 66-switching motor; 67-water inlet; 68-a water outlet valve; 7-a water leakage groove; 8-a temperature measuring component; 81-temperature meter; 82-a temperature measuring head; and 9-a screw.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.

Example 1:

a reaction kettle for preparing 3-hydroxypropionic acid with high efficiency and energy saving comprises a kettle body 1, a bracket 2, a stirring mechanism 3, a heat exchange coil 4, a material preparation mechanism 5 and a filtering mechanism 6; the bottom surface of the kettle body 1 is fixedly connected with the bracket 2; the material preparation mechanism 5 is arranged in the middle of the outer side surface of the kettle body 1, and can complete the preheating of external fillers when the inner cavity of the kettle body 1 is heated through the internal heat exchange coil 4; the filtering mechanism 6 is arranged at the bottom of the inner cavity of the kettle body 1;

the heat exchange coil 4 is of a spiral tubular structure; the inlet end and the outlet end of the heat exchange coil 4 respectively penetrate through the outer side surface of the kettle body 1; the heat exchange part of the heat exchange coil 4 is arranged in the middle of the inner cavity of the kettle body 1;

the stirring mechanism 3 comprises a stirring motor 31 and a stirring component; the stirring motor 31 is fixedly arranged on the top surface of the kettle body 1; the top end of the stirring component is in transmission connection with a stirring motor 31, and the bottom end of the stirring component is arranged in the heat exchange part of the heat exchange coil 4; a temperature measuring component 8 is fixedly arranged on the outer side surface of the kettle body 1; a feed inlet is arranged on the top surface of the kettle body 1; the feed inlet is communicated with the material preparation mechanism 5;

the temperature measuring component 8 and the heat exchange coil 4 are respectively arranged above the filtering mechanism 6.

In a further optimized scheme, the material preparation mechanism 5 comprises an annular shell 51; the inner wall of the annular shell 51 is fixedly connected with the outer side surface of the kettle body 1, so that the preheating of the filler flowing in the annular shell 51 is completed through the heat conduction of the shell of the kettle body 1, and the utilization efficiency of heat is improved; the top of the side surface of the annular shell 51 is fixedly connected and communicated with a feeding pipe 52; the bottom of the side surface of the annular shell 51 is fixedly connected and communicated with a discharge pipe 53; the discharge pipe 53 is provided with a control valve 54; the discharge pipe 53 is fixedly connected and communicated with the feed inlet.

Further, the control valve 54 is a switching water valve, which is connected in series to the discharge pipe 53 and can control whether the filler in the annular housing 51 is discharged or not.

In a further optimized scheme, the stirring component comprises a stirring rod 32 and a plurality of blades 33; a plurality of blades 33 are horizontally and fixedly connected to the bottom end of the stirring rod 32 and arranged in the heat exchange part of the heat exchange coil 4; the top end of the stirring rod 32 runs through the top surface of the kettle body 1 and is in transmission connection with the stirring motor 31, the stirring assembly can provide a sufficient and uniform environment for reaction raw materials arranged in the kettle body 1, and the local enrichment of the pH value or nutrient components in the reaction raw materials is avoided, so that the production efficiency is low.

In a further optimized scheme, the filtering mechanism 6 comprises a filtering disc 61; a plurality of through grooves are formed in the top surface of the filter disc 61 at equal intervals in the circumferential direction; an ultrafiltration membrane 62 is fixedly arranged in the through groove; the side surface of the filter disc 61 is connected with the side wall of the inner cavity of the kettle body 1 in a sliding way, and the bottom surface of the filter disc 61 is attached with a water leakage disc 63; the side surface of the water leakage disc 63 is fixedly connected with the side wall of the inner cavity of the kettle body 1; an output component is fixedly connected to the center of the filter disc 61; the bottom end of the output component sequentially penetrates through the water leakage disc 63 and the bottom surface of the kettle body 1.

Further, ultrafiltration membrane 62 can filter the microorganism of aquatic, and macromolecule and water in aquatic can permeate through, have realized filterable effect. The ultrafiltration membrane 62 is prior art and will not be described in detail herein.

In a further optimized scheme, the output assembly comprises a rotating shaft 64 and a material conveying pipe 65; the top end of the rotating shaft 64 penetrates through the water leakage disc 63 and is fixedly connected with the center of the filter disc 61; the bottom end of the rotating shaft 64 is connected with the inner cavity of the material conveying pipe 65 in a sliding way; the bottom end of the rotating shaft 64 is connected with a switching motor 66 fixedly connected with the inner cavity of the material conveying pipe 65 in a transmission way; a plurality of water inlet holes 67 are formed in the side surface of the material conveying pipe 65; the feed delivery pipe 65 is provided with a water outlet valve 68.

Further, the rotating shaft 64 is connected with the center of the water leakage disc 63 in a sealing and sliding manner, so that the reaction raw materials in the kettle body 1 are prevented from permeating through the gap between the rotating shaft and the water leakage disc.

In a further optimized scheme, a plurality of water leakage grooves 7 are formed in the circumferential direction of the top surface of the water leakage disc 63 at equal intervals; the water leakage groove 7 is arranged corresponding to the through groove.

Furthermore, the part between two adjacent through grooves completely covers any water leakage groove 7, so that the filter disc 61 and the water leakage disc 63 can be communicated or not communicated after the filter disc 61 rotates for a certain angle.

In a further optimized scheme, the temperature measuring component 8 comprises a thermometer 81 and a temperature measuring head 82; the thermometer 81 is fixedly connected and electrically connected with the temperature measuring head 82; one end of the temperature measuring head 82 penetrates through the side surface of the kettle body 1 and is arranged in the inner cavity of the kettle body 1.

Further, the temperature measuring head 82 is arranged in the reaction raw materials, so that the temperature of the reaction raw materials can be monitored at any time, temperature imbalance is avoided, and production efficiency is reduced.

Further optimize the scheme, the lateral surface of the annular shell 51 and the lateral surface of the kettle body 1 are respectively provided with a heat preservation layer, so that the protection is performed for the constant temperature of the reaction raw materials, and the energy consumption is reduced.

Further optimize the scheme, the funnel-shaped setting is done to 1 bottom surface of the cauldron body, and the reaction raw materials after the collection filtration that can maximize avoid reaction raw materials to be detained in the position of the dead angle of 1 bottom of the cauldron body, cause the waste.

In a further optimized scheme, the support 2 comprises a plurality of support legs; one end of the supporting leg is fixedly connected with the bottom surface of the kettle body 1, and the other end of the supporting leg is arranged on the ground.

The working process of the embodiment is as follows:

pumping a certain amount of reaction raw materials into the feeding pipe 52 by an external pumping mechanism, feeding the reaction raw materials into the annular shell 51, opening the control valve 54, and feeding the reaction raw materials into the kettle body 1 through the discharging pipe 53 and the feeding hole by means of the pumped pressure; at this time, by turning on the switching motor 66, the filter disk 61 is rotated so that the through groove and the water leakage groove 7 are staggered from each other, and the filter disk 61 and the water leakage disk 63 are not communicated with each other.

The entered reaction raw materials are retained above the filter disc 61, the temperature measuring head detects the temperature of the reaction raw materials, and if the temperature reaches the preset temperature, the stirring motor 31 is started to drive the stirring rod 32 and the blades 33 to realize constant-speed stirring; if the temperature does not reach the preset temperature, waste steam is injected into the heat exchange coil 4 to heat up, and the stirring motor 31 is started to stir the reaction raw materials in the process, so that the heat exchange speed is increased;

in the temperature rising process, the feeding pipe 52 continuously injects the reaction raw materials into the annular shell 51 (at this time, the microorganism is not added to the reaction raw materials), and the control valve 54 is closed, so that the temperature rising of the reaction raw materials in the annular shell 51 and the reaction raw materials in the kettle body 1 is realized simultaneously.

When the reaction raw materials in the kettle body 1 reach the preset temperature, the introduction of the waste steam of the heat exchange coil 4 is stopped, and at the moment, the stirring mechanism 3 continues to stir, so that the rapid reaction of the reaction raw materials is facilitated.

After the reaction of the reaction raw materials in the kettle body 1 is finished, the switching motor 66 is started, the filter disc 61 is rotated, the communication between the filter disc 61 and the water leakage disc 63 is realized, and at the moment, the reaction raw materials in the kettle body 1 enter the lower part of the kettle body 1 after being filtered by the ultrafiltration membrane 62 and are led out to an external collecting device through the water inlet 67, the material conveying pipe 65 and the opened water outlet valve 68. The microorganisms in the reaction raw materials still stay above the filter disc 61, and when the reaction raw materials are filtered, the microorganisms in the reaction raw materials in the annular shell 51 are filtered and stayed because of the previous reaction raw materials, so that the stayed microorganisms can be used for participating in the second reaction, and the production cost is reduced.

Example 2:

the filtering mechanism of the embodiment is different from the first embodiment only in that the rotating shaft is in threaded connection with a screw 9, the bottom end of the screw 9 is in transmission connection with a switching motor 66, and the switching motor 66 is a waterproof motor; the water outlet valve 68 is closed, so that the filtered solution is fully stored below the filter disc 61, and the backwashing of the ultrafiltration membrane 62 is realized by switching the forward rotation and the reverse rotation of the motor 66, so that the filtering speed is improved, the blockage of the ultrafiltration membrane 62 is avoided, and the use cost is reduced.

Example 3

The filter disc 61 of the present embodiment is different from the first embodiment only in that a ring groove is formed in a side surface of the filter disc 61; a metal elastic ring 9b matched with the annular groove is arranged in the annular groove, a silica gel ring 9a is attached to the outer side surface of the metal elastic ring 9b, and the outer side surface of the silica gel ring 9a is in sliding connection with the inner side surface of the kettle body 1; the metal elastic ring 9b gives the outward expansion force to the silica gel ring 9a, so that the silica gel ring 9a can be tightly attached to the inner cavity of the kettle body 1, the frictional wear caused by the direct sliding connection between the outer side surface of the filter disc 61 and the kettle body 1 is avoided, and the leakage caused by the gap which cannot be avoided due to the direct sliding connection between the outer side surface of the filter disc and the kettle body is also avoided.

Example 4

In heat exchange coil 4 of this embodiment moved into annular housing 51, carried out the direct heating to reaction raw materials through heat exchange coil 4, reaction raw materials in the cauldron body 1 passed through the reaction raw materials transmission heat in annular housing 51, realized keeping warm to the indirect heating of the reaction raw materials in the cauldron body 1, avoided some special microorganisms that reaction raw materials in the cauldron body 1 contain to meet heat exchange coil 4 of high temperature and cause death, influence reaction efficiency.

In the description of the present invention, it is to be understood that the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, are merely for convenience of description of the present invention, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.

The above-described embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements of the technical solutions of the present invention can be made by those skilled in the art without departing from the spirit of the present invention, and the technical solutions of the present invention are within the scope of the present invention defined by the claims.