CN213623786U

CN213623786U - Sludge hydrothermal carbonization reaction kettle

Info

Publication number: CN213623786U
Application number: CN202022440684.0U
Authority: CN
Inventors: 欧阳云生; 胡尚英
Original assignee: Sichuan Oumeihua Environmental Engineering Co ltd
Current assignee: Sichuan Oumeihua Environmental Engineering Co ltd
Priority date: 2020-10-29
Filing date: 2020-10-29
Publication date: 2021-07-06
Anticipated expiration: 2030-10-29

Abstract

The utility model discloses a mud hydrothermal carbonization reation kettle, its characterized in that: the device comprises an upper cover, a reaction kettle tank body, a jacket and a support frame, wherein a feed inlet and an emptying pipe are arranged at the bottom of the reaction kettle tank body, a catalyst inlet is arranged beside the feed inlet, a discharge outlet is arranged at the upper end of the reaction kettle tank body, a hot oil inlet is arranged at the upper end of the jacket, and a hot oil outlet is arranged at the lower end of the jacket. The utility model discloses after the improvement, mud gets into, the upper end is discharged from reation kettle tank bottom, and the other catalyst import pipe that has set up of mud inlet can effectively guarantee the required heat transfer area of mud heat transfer like this, guarantees behind the catalyst entering reation kettle fast under the effect of mixer and the mud mixes.

Description

Sludge hydrothermal carbonization reaction kettle

Technical Field

The utility model relates to a sludge treatment field, particularly relate to a reaction unit of mud low temperature hydrothermal carbonization.

Background

The low-temperature hydrothermal carbonization of sludge is a novel sludge treatment technology which is rapidly developed in recent years, and realizes the recycling, reduction, stabilization and harmlessness of sludge. The low-temperature hydrothermal carbonization of the sludge is firstly researched and applied by engineering abroad, and with the improvement of national requirements on sludge recycling and harmlessness, the common sludge landfill, returning field utilization and incineration modes face the challenges of high operation cost and poor public acceptance, and the low-temperature hydrothermal carbonization technology of the sludge is introduced into China and is actively absorbed, improved, popularized and applied by domestic experts and users.

The sludge low-temperature hydrothermal carbonization treatment system mainly comprises a sludge feeding bin, a heat exchanger, a sludge carbonization reaction kettle, a sludge storage tank and a vacuum filter press, wherein the most core equipment of the system is the sludge carbonization reaction kettle. The low-temperature hydrothermal carbonization of the sludge is to put the sludge with a certain water content into a reaction kettle with the pressure of 2-3.5MPa, heat the sludge to 180-230 ℃, hydrolyze organic matters in the sludge under the anaerobic condition and in the presence of a proper catalyst, further decompose hydrolysis products through dehydration and decarboxylation reactions, induce polymerization and condensation reactions in the monomer dehydration process to form biochar, and keep the sludge in the reaction kettle for 2-4 hours.

In the actual municipal sludge carbonization project, the sludge is preheated by using the waste heat of the carbonized sludge before entering the carbonization reaction kettle, but the sludge with the water content of 80 percent has higher viscosity and low heat conductivity, so the temperature of the sludge entering the reaction kettle is usually below 150 ℃, and the sludge needs to be quickly mixed in the reaction kettle to improve the temperature so as to achieve the reaction condition. In the process of continuous operation of the project, the carbonization time of sludge in the reaction kettle for 2-4 hours must be ensured, and the phenomenon that partial sludge flows in the reaction kettle in a short time under the stirring action of a stirrer to influence the sludge carbonization effect is avoided.

At present, a reaction catalyst is added into a pipeline in front of a reaction kettle in some projects, so that the catalyst cannot be quickly mixed with sludge after entering the pipeline. In the research on the low-temperature hydrothermal carbonization of the sludge, less hydrothermal carbonization reaction kettles are involved in practical engineering projects. The height-diameter ratio of a conventional reaction kettle is generally 1-2.5, the configured stirrer is generally a single paddle type stirrer, a single plug flow type stirrer, a single frame type stirrer, a single anchor type stirrer, a single disk turbine type stirrer, a single spiral ribbon type stirrer or a combination of the single paddle type stirrer, the requirement that three different reaction states of sludge hydrothermal carbonization need different medium flow states cannot be well met, meanwhile, the stirrer is unreasonable in arrangement, sludge short flow can occur to part of sludge, and the phenomenon that the carbonization effect is poor occurs.

SUMMERY OF THE UTILITY MODEL

Therefore, in order to solve the not enough of prior art, the utility model provides a mud hydrothermal carbonization reation kettle, mud get into, the upper end is discharged from reation kettle tank bottom, and the other catalyst import pipe that has set up of mud inlet can effectively guarantee the required heat transfer area of mud heat transfer like this, guarantees behind the catalyst entering reation kettle fast under the effect of mixer and the mud mixes.

The utility model discloses a realize like this, construct a mud hydrothermal carbonization reation kettle, its characterized in that: the device comprises an upper cover, a reaction kettle tank body, a jacket and a support frame, wherein a feed inlet and an emptying pipe are arranged at the bottom of the reaction kettle tank body, a catalyst inlet is arranged beside the feed inlet, a discharge outlet is arranged at the upper end of the reaction kettle tank body, a hot oil inlet is arranged at the upper end of the jacket, and a hot oil outlet is arranged at the lower end of the jacket.

According to the utility model a mud hydrothermal carbonization reation kettle, its characterized in that: the height-diameter ratio of the tank body of the reaction kettle is 2.5-4.5, and the tank body is made of stainless steel; the baffle has been set up to the lateral wall under the reation kettle jar body, and the height of baffle is 1/5~1/4 of jar body height, and the quantity is 4~8, and the material is the stainless steel.

According to the utility model a mud hydrothermal carbonization reation kettle, its characterized in that: the upper cover is provided with an access hole, a hydrothermal carbonization reaction stirrer and a process connecting pipe, wherein the process connecting pipe comprises a temperature detection port, a pressure regulating valve port, a safety valve port, a pressure release valve port, a flushing water port and an exhaust port.

According to the utility model a mud hydrothermal carbonization reation kettle, its characterized in that: three layers of stirring blades are arranged on a stirring shaft corresponding to the hydrothermal carbonization reaction stirrer, the lowest end of the stirring shaft is a composite mixed flow blade, the middle layer of the stirring shaft is a radial flow disc type blade, the highest end of the stirring shaft is a radial flow blade, and the lower end of the hydrothermal carbonization reaction stirrer is supported by a bottom.

According to the utility model a mud hydrothermal carbonization reation kettle, its characterized in that: the combined mixed flow blade comprises a helical belt type blade and a turbine type inclined blade; the helical belt type blade is positioned at the lower part of the turbine inclined blade; the spiral direction of the spiral belt type blade rises along with the rotation direction; the turbine type inclined blade comprises a rotary plate and inclined blades, wherein the rotary plate is provided with uniformly distributed round holes, and the number of the round holes is 4-8; the oblique leaf equipartition is on the carousel excircle, and the quantity is 4~8, and the contained angle a of oblique leaf and (mixing) shaft is 15~30 degrees.

According to the utility model a mud hydrothermal carbonization reation kettle, its characterized in that: the radial flow disc type blade comprises a rotary disc, an outer blade and a central blade; the outer blades are 2-8 and are uniformly distributed in the radial direction of the turntable, and the outer blades are parallel to the stirring shaft; the central blade also is 2~8, distributes on the carousel terminal surface and is close to the stirring axle center, and central blade is 15~45 degrees with the contained angle b of outer leaf.

According to the utility model a mud hydrothermal carbonization reation kettle, its characterized in that: the radial flow paddle has stirring vane, and stirring vane is 2, has corresponding upstream surface and is smooth curve, and stirring vane inboard width and thickness are big, and the width and the thickness of outside are little.

The utility model has the advantages of as follows: a sludge hydrothermal carbonization reaction kettle relates to a reaction device for low-temperature hydrothermal carbonization of sludge; the combined type mixed flow blade comprises an upper cover, a reaction kettle tank body, a jacket, a supporting frame, wherein the height-diameter ratio of the reaction kettle tank body is 2.5-4.5, the tank body is made of stainless steel, the upper cover is provided with an access hole, a hydrothermal carbonization reaction stirrer and a process connecting pipe, three layers of stirring blades are configured on a stirring shaft of the hydrothermal carbonization reaction stirrer, the lowest end of the stirring shaft is a combined type mixed flow blade, the middle layer is a radial flow disc type blade, the highest end of the stirring shaft is a radial flow paddle blade, the combined type mixed flow blade comprises a spiral belt type blade and a turbine type inclined blade, the radial flow disc type blade comprises a rotary disc, an outer blade and a central blade, the number of the stirring blades of.

The utility model provides a pair of mud hydrothermal carbonization reation kettle has hot oil heating jacket, and the cauldron body has adopted the height-diameter ratio of 2.5~4.5, and this can improve the heat exchange area of mud and cauldron wall, also guarantees the carbonization reaction time of mud in the continuous processing process more easily. The utility model is provided with a hydrothermal carbonization reaction stirrer, the stirrer is provided with three layers of stirring blades, the lowest end is provided with a composite mixed flow blade, and the axial and radial strong mixed flow of sludge is formed, so that the sludge in the kettle is rapidly heated and reaches the reaction condition, and the hydrolysis is rapidly carried out; the middle layer is a radial flow disc type blade, so that the sludge and the side wall can exchange heat quickly, and the short flow of the sludge in the reaction kettle is prevented; the top end is provided with radial flow blades, and the medium flow state is uniform when radial flow is formed, thereby being beneficial to the discharge of gas and the carbonization of sludge in reaction. The utility model discloses mud hydrothermal carbonization reation kettle disposes 3 layers of different stirring vane according to the mud characteristics and the reaction requirement in each stage of sludge reaction on the mixer, has satisfied the needs that mud fully carbonized in reation kettle, and mud carbonization effect is showing and is improving.

The utility model has the following improvements and advantages:

its 1, the utility model provides a pair of mud hydrothermal carbonization reation kettle has hot oil heating jacket, and the cauldron body has adopted the height-diameter ratio of 2.5~4.5, and this can improve the heat exchange area of mud and cauldron wall, also guarantees the carbonization reaction time of mud in the continuous processing in-process more easily.

And 2, the utility model discloses configured hydrothermal carbonization reaction mixer, the agitator takes three-layer stirring vane, and the lower extreme is combined type mixed flow blade, and combined type mixed flow blade includes helical ribbon formula blade and turbine formula oblique leaf. The spiral belt type blade at the sludge feeding hole can quickly stir the sludge which just enters the reaction kettle, so as to realize the mixing with the catalyst and the heat exchange with other sludge; the turbine inclined blades positioned above are matched with the side wall baffle to form strong mixed flow of axial and radial sludge, so that the sludge in the kettle is quickly heated and reaches reaction conditions to quickly hydrolyze.

And 3, the middle layer of the hydrothermal carbonization reaction stirrer is a radial flow disc type blade, and the blade forms radial flow from inside to outside, so that the sludge and the side wall can exchange heat quickly, the temperature of the sludge is further increased, and the sludge can be subjected to further dehydration and decarboxylation reactions. The rotary disc of the radial flow disc type blade is a solid plate, so that the sludge of mixed flow below can be prevented from turning upwards, and the sludge in the reaction kettle is prevented from short flow. The top of the stirrer is a radial flow blade, the upstream surface of the blade is a smooth curve, and the inner side of the blade is wider than the outer side of the blade and is thicker than the outer side of the blade, so that the blade can push the medium from inside to outside when rotating, the medium flow state is uniform when radial flow is formed, and the discharge of gas and sludge carbonization in the reaction are facilitated.

And 4, overall, the sludge hydrothermal carbonization reaction kettle is provided with 3 layers of different stirring blades on the stirrer according to the sludge characteristics and the reaction requirements of each stage of the sludge reaction, so that the requirement of full carbonization of the sludge in the reaction kettle is met, and the sludge carbonization effect is obviously improved.

Drawings

FIG. 1 is a schematic main sectional view of a structure of a sludge hydrothermal carbonization reaction kettle of the utility model;

fig. 2 is a schematic structural view of a turbine inclined vane of the present invention;

FIG. 3 is a schematic cross-sectional view taken along line I-I of FIG. 2;

FIG. 4 is a schematic structural view of a radial flow disk blade according to the present invention;

fig. 5 is a schematic structural view of the radial flow blade of the present invention.

Wherein: the device comprises an upper cover 1, an access hole 2, a hydrothermal carbonization reaction stirrer 3, a process connecting pipe 4, a reaction kettle tank body 5, a hot oil inlet 6, a jacket 7, a support frame 8, a baffle plate 9, a composite mixed flow blade 10, a limiting bearing 11, a catalyst inlet 12, an emptying pipe 13, a feed inlet 14, a spiral belt type blade 15, a hot oil outlet 16, a turbine type inclined blade 17, a radial flow disc type blade 18, a radial flow blade 19, a discharge hole 20, an inclined blade 21, a rotary disc 22, an outer blade 23, a central blade 24, stirring blades 25 and a water facing surface 26.

Detailed Description

The present invention will be described in detail with reference to fig. 1 to 5, and the technical solutions in the embodiments of the present invention will be clearly and completely described, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

The utility model discloses an improve and provide a mud hydrothermal carbonization reation kettle here, with the height-diameter ratio improvement for 2.5~4.5, mud gets into, the upper end is discharged from reation kettle tank bottom, advances the other catalyst import pipe that has set up of mud mouth, can effectively guarantee the required heat transfer area of mud heat transfer like this, guarantees behind the catalyst entering reation kettle fast under the effect of mixer and the mud mixes.

According to the condition requirements of different stages of the hydrothermal carbonization reaction, a special stirrer for the hydrothermal carbonization reaction is configured on the reaction kettle, three layers of stirring blades of the stirrer for the hydrothermal carbonization reaction are arranged, each blade provides different flow states according to the requirements of the sludge reaction state, and the composite mixed flow blade is arranged at the lowest end of the stirrer for the hydrothermal carbonization reaction, so that the sludge entering the reaction kettle can generate axial and radial mixed flow, the uniform mixing of the sludge and a catalyst is realized, and the quick heat transfer between the sludge and the side wall is realized; the middle layer is a radial flow disc type blade which forms a radial uniform flow state of the sludge and prevents the axial flow channeling of the sludge at the lower layer; the top end is provided with a radial flow paddle to form a radial uniform flow state.

As shown in the figures 1-5, the example process of a sludge hydrothermal carbonization reaction kettle is as follows; the device comprises an upper cover 1, a reaction kettle tank body 5, a jacket 7 and a support frame 8, wherein the bottom of the reaction kettle tank body 5 is provided with a feed inlet 14 and an emptying pipe 13, a catalyst inlet 12 is arranged beside the feed inlet 14, the upper end of the reaction kettle tank body 5 is provided with a discharge outlet 20, the upper end of the jacket 7 is provided with a hot oil inlet 6, and the lower end of the jacket 7 is provided with a hot oil outlet 16.

The height-diameter ratio of the reaction kettle tank body 5 is 2.5-4.5, and the tank body is made of stainless steel; baffle 9 has been set up to 5 lateral walls of reation kettle jar body, and the height of baffle 9 is 1/5~1/4 of jar body height, and the quantity is 4~8, and the material is the stainless steel.

When the utility model is implemented; the upper cover 1 is provided with an access hole 2, a hydrothermal carbonization reaction stirrer 3 and a process connecting pipe 4, wherein the process connecting pipe 4 comprises a temperature detection port, a pressure regulating valve port, a safety valve port, a pressure release valve port, a flushing water port and an exhaust port.

When the utility model is implemented; three layers of stirring blades are arranged on a stirring shaft of the hydrothermal carbonization reaction stirrer 3, the lowest end of the stirring shaft is provided with a composite mixed flow blade 10, the middle layer is provided with a radial flow disc type blade 18, the highest end of the stirring shaft is provided with a radial flow blade 19, and the lower end of the hydrothermal carbonization reaction stirrer 3 is provided with a limit bearing 11. The composite mixed flow blade comprises a helical band blade 15 and a turbine inclined blade 17. The helical-belt-type blade 15 is positioned at the lower part of the turbine-type inclined blade 17, and the helical direction of the helical-belt-type blade 15 rises along with the rotation direction. The turbine type inclined blade 17 comprises a rotary table 22 and inclined blades 21, wherein the rotary table 22 is provided with uniformly distributed circular holes, and the number of the circular holes is 4-8; oblique leaf 21 equipartition is on the carousel 22 excircle, and the quantity is 4~8, and the contained angle a of oblique leaf 21 and (mixing) shaft is 15~30 degrees. Radial flow disk blades 18 include a rotating disk 22, outer blades 23, and center blades 24. The outer blades 23 are 2-8 pieces and are uniformly distributed in the radial direction of the turntable 22, and the outer blades 23 are parallel to the stirring shaft. The number of the central blades 24 is also 2-8, the central blades are distributed on the end face of the rotary table 22 and close to the stirring axis, and the included angle b between the central blades 24 and the outer blades 23 is 15-45 degrees. The number of the stirring blades 25 of the radial flow paddle 19 is 2, the upstream surface 26 is a smooth curve, the width and the thickness of the inner side of the stirring blade 25 are large, and the width and the thickness of the outer side are small.

The utility model has the following improvements and advantages:

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. The utility model provides a mud hydrothermal carbonization reation kettle which characterized in that: the device comprises an upper cover (1), a reaction kettle tank body (5), a jacket (7) and a support frame (8), wherein a feed inlet (14) and an emptying pipe (13) are arranged at the bottom of the reaction kettle tank body (5), a catalyst inlet (12) is arranged beside the feed inlet (14), a discharge outlet (20) is arranged at the upper end of the reaction kettle tank body (5), a hot oil inlet (6) is arranged at the upper end of the jacket (7), and a hot oil outlet (16) is arranged at the lower end of the jacket.

2. The sludge hydrothermal carbonization reaction kettle according to claim 1, characterized in that: the height-diameter ratio of the reaction kettle tank body (5) is 2.5-4.5, and the tank body is made of stainless steel; baffle (9) have been set up to the lateral wall under the reation kettle jar body (5), and the height of baffle (9) is 1/5~1/4 of jar body height, and the quantity is 4~8, and the material is the stainless steel.

3. The sludge hydrothermal carbonization reaction kettle according to claim 1, characterized in that: the upper cover (1) is provided with an access hole (2), a hydrothermal carbonization reaction stirrer (3) and a process connecting pipe (4), and the process connecting pipe (4) comprises a temperature detection port, a pressure regulating valve port, a safety valve port, a pressure release valve port, a flushing water port and an exhaust port.

4. The sludge hydrothermal carbonization reaction kettle according to claim 3, characterized in that: three layers of stirring blades are arranged on a stirring shaft corresponding to the hydrothermal carbonization reaction stirrer (3), the lowest end of the stirring shaft is a composite mixed flow blade (10), the middle layer is a radial flow disc type blade (18), the highest end of the stirring shaft is a radial flow blade (19), and the lower end of the hydrothermal carbonization reaction stirrer (3) is provided with a bottom support (11).

5. The sludge hydrothermal carbonization reaction kettle according to claim 4, is characterized in that: the composite mixed flow blade (10) comprises a helical band type blade (15) and a turbine type inclined blade (17); the helical belt type blade (15) is positioned at the lower part of the turbine type inclined blade (17); the spiral direction of the spiral belt type blade (15) rises along with the rotation direction; the turbine type inclined blade (17) comprises a rotary table (22) and inclined blades (21), wherein the rotary table (22) is provided with uniformly distributed round holes, and the number of the round holes is 4-8; the inclined blades (21) are uniformly distributed on the outer circle of the turntable (22), the number of the inclined blades is 4-8, and the included angle a between each inclined blade (21) and the stirring shaft is 15-30 degrees.

6. The sludge hydrothermal carbonization reaction kettle according to claim 4, is characterized in that: the radial flow disc type blade (18) comprises a rotating disc (22), an outer blade (23) and a central blade (24); the outer blades (23) are 2-8 and are uniformly distributed in the radial direction of the turntable (22), and the outer blades (23) are parallel to the stirring shaft; the number of the central blades (24) is also 2-8, the central blades are distributed on the end face of the rotary disc (22) and are close to the stirring axis, and the included angle b between the central blades (24) and the outer blades (23) is 15-45 degrees.

7. The sludge hydrothermal carbonization reaction kettle according to claim 4, is characterized in that: the radial flow paddle (19) is provided with 2 stirring blades (25), the corresponding upstream surface (26) is a smooth curve, the width and the thickness of the inner side of each stirring blade (25) are large, and the width and the thickness of the outer side of each stirring blade are small.