KR101866701B1 - Discharging system of a high-pressure reactor, an apparatus and a method for continuously pouducing solid-liquid surry from waste sludge - Google Patents

Abstract

The present invention relates to a discharge system of a high pressure reactor, comprising: a closed reactor in which an inlet line and an outlet line are formed; a storage tank for storing a reactant flowing out of the reactor; and a discharge member formed on the fluid line between the reactor and the storage tank, wherein the discharge member includes a section which is depressurized sequentially or continuously along the fluid flow direction inside. The system can be effectively applied to an apparatus and a method for continuously producing solid-liquid slurry.

Description

TECHNICAL FIELD [0001] The present invention relates to an apparatus and a method for continuously producing a high-slurry slurry from a sludge, an exhaust system of a high-pressure reactor, an apparatus and a method for continuously producing a slurry from a sludge,

The present invention relates to an exhaust system for a high-pressure reactor, an apparatus for continuously producing a high-slurry and a method for manufacturing the same.

The number and / or capacity of wastewater treatment plants increased with industry level and economic growth, and the amount of sewage sludge generated in sewage treatment plants also steadily increased. In the past, sewage sludge was dumped in the ocean and disposed of, but such marine dumping is prohibited in order to prevent marine pollution.

In the case of Korea, the sewage sludge generated from about 600 sewage treatment facilities is more than 3.65 million tons per year. In addition, the Korea Environment Corporation estimates that sewage sludge of 4.6 million tons in 2020 and 5.3 million tons in 2025 will be generated. The generated sewage sludge is treated by incineration, landfill, fertilization, fertilizing or fueling. In particular, about 41% of the total amount of sewage sludge is disposed of through incineration or landfill. Sewage sludge treated with incineration or landfill has the problem of polluting the atmosphere or the soil.

On the other hand, the sewage sludge generated in the sewage treatment plant contains more than 80% of moisture, and in order to fuel such sewage sludge, the water content should be controlled to 10% or less. In order to remove moisture contained in the sewage sludge, a drying technique for drying the sewage sludge is applied. The above-mentioned drying technology has a disadvantage in that a large amount of equipment or facility for drying sewage sludge causes a large investment cost and a large energy cost for drying. In particular, the drying technique has an influence on the living environment due to odor and dust generated in the course of drying the sewage sludge.

Hydrothermal carbonization is another method for removing moisture from sewage sludge. Hydrothermal carbonization treats sludge in a closed system, unlike drying technology, which can solve odor and dust problems during the process and reduce energy consumption compared to conventional drying methods.

Hydrothermal carbonization technology carries out the carbonization of sewage sludge in a reactor under high temperature and pressurized conditions. However, since the hydrothermal carbonization technique must maintain a high pressure inside the reactor, it is difficult to apply it to a continuous process.

Therefore, there is an increasing need for more advanced techniques to overcome the above problems.

Korean Patent Registration No. 10-0515497

The present invention provides a discharge system for a high-pressure reactor capable of continuous processing, an apparatus for continuously producing a high-slurry and a method for manufacturing the same.

In one embodiment, the discharge system of the high-pressure reactor according to the present invention comprises:

A closed reactor in which an inlet line and an outlet line are formed;

A storage tank for storing the reactant flowing out of the reactor; And

A discharge member formed on the fluid line between the reactor and the storage tank,

The discharge member includes a section that is sequentially or continuously reduced in pressure along the fluid flow direction inside.

In another embodiment, the apparatus for continuous production of a solid slurry according to the present invention comprises:

A high pressure reactor in which an inlet line for introducing the organic sludge and an outlet line for discharging the reactant are formed;

A supply member fluidly connected to the inflow line of the high-pressure reactor to supply organic sludge;

A discharge member fluidly connected to the outflow line of the high-pressure reactor to discharge the reaction product; And

And a storage tank for storing a solid slurry containing a solid product and a liquid desorption liquid flowing out from the discharge member,

The discharge member is decompression means including a section that is depressurized sequentially or continuously along the fluid flow direction inside.

In another embodiment, the continuous method of producing a solid slurry according to the present invention comprises:

Heating and pressurizing the organic sludge in a reactor at a temperature of 150 to 210 DEG C and a pressure of 15 to 50 bar to produce a carbonized slurry; And

Fluidly moving the carbonized slurry from the reactor to the reservoir and separating the solid product and the liquid desorption from the carbonized slurry,

The process of fluidly moving the carbonized slurry from the reactor to the reservoir,

And is fluidly moved from the depressurized state to the reservoir via a section that is sequentially or continuously depressurized along the fluid flow direction.

The discharge system of the high-pressure reactor according to the present invention enables continuous discharge to reactants, which can be effectively applied to an apparatus and a method for continuously producing solid slurry.

1 is a schematic diagram of a discharge system of a high pressure reactor according to one embodiment of the present invention.
2 is a schematic diagram of a continuous apparatus for producing a high-slurry slurry according to another embodiment of the present invention.
3 is a perspective view including a partial cross-sectional view of the discharge member according to the present invention.

The present invention provides a system capable of effectively discharging reacted reactants in a reactor.

In one example, the discharge system of the high-pressure reactor according to the present invention comprises:

A closed reactor in which an inlet line and an outlet line are formed;

A storage tank for storing the reactant flowing out of the reactor; And

And a discharge member formed on the fluid line between the reactor and the storage tank.

The reactor is a closed structure and may be a high pressure reactor. In the present invention, the term 'high-pressure reactor' means a reactor in which the reaction proceeds at a temperature higher than atmospheric pressure. Specifically, the reactor means a reactor having an allowable internal pressure of 15 bar or more. In one example, the high pressure reactor may have an allowable internal pressure in the range of 17 to 50 bar or 19 to 30 bar or 20 to 25 bar.

In addition, the discharge member is a structure including a section that is sequentially or continuously reduced along the fluid flow direction inside. The term " sequentially or continuously depressurized zone " means that the pressure in the pipe through which the fluid moves is not temporarily lowered but the pressure is sequentially or continuously lowered at a certain distance or at a certain time interval do. This concept is distinguished from a general discharge pump or valve-type discharge structure in which the pressure temporarily drops during discharge of the reactant.

In one example, the discharge member includes an inlet line through which reactant flows; And an outlet line through which the reactant flows,

Based on the inlet pressure P ₁ ,

1/2 (P _1/2) in area of the inner pressure when the pressure inlet of the inlet line,

1/4 (P _1/4) in area of the inner pressure when the pressure inlet of the inlet line, and

Comprises a section the internal pressure, this 1/8 (P _1/8) in area of the inlet pressure during the inlet line sequentially or continuously formed.

In one example, the pressure at the outlet end of the discharge member may be at atmospheric pressure (1 atm).

The discharge member may be, for example, a structure in which the reactant flows out or is discharged along the direction in which the screw rotates. In addition, the discharge member may be a structure in which the inner diameter of the flow path sequentially or continuously increases along with the fluid flow, or may be a structure in which the pressure decreases sequentially or continuously along the fluid flow.

The present invention also provides an apparatus for continuously producing solid slurry. In one example, the apparatus for continuously producing a high-slurry slurry according to the present invention comprises: a high-pressure reactor having an inlet line for introducing an organic sludge and an outlet line for discharging a reactant; A supply member fluidly connected to the inflow line of the high-pressure reactor to supply organic sludge; A discharge member fluidly connected to the outflow line of the high-pressure reactor to discharge the reaction product; And a reservoir for containing a solid slurry containing a solid product and a liquid desorption liquid flowing out from the discharge member. The discharging member includes a case of decompression means including a section that is sequentially or continuously reduced in pressure along the direction of the fluid flow inside.

In another example, the supply member may be a pressurizing means including a section in which the pressure is successively or continuously applied along the fluid flow direction inside. In this case, the supply member and the discharge member may be structured such that members having the same type and the same capacity are used, but the directions of inflow and outflow are designed to be opposite to each other. As a result, it is easy to balance the overall inflow and outflow, and it is easy to secure parts and maintenance. For example, as the supply member, a fluid supply pump in which the internal pressure sequentially or continuously rises can be used.

Further, the apparatus for continuous production of a high-slurry slurry according to the present invention adopts a method for controlling the operation of the supply member and / or the discharge member and / or the treatment flow rate by measuring the level inside the tank. Here, the tank means a reactor or a storage tank. An apparatus including a conventional high-pressure reactor mainly employs a method of controlling the apparatus through pressure measurement. The present invention enables more intuitive and stable control through the level measurement inside the tank. In particular, when a high-pressure reactor is used, the pressure inside the reactor has a limitation due to a large error due to various variables such as the amount of sludge or the content of volatile substances.

In one example, the apparatus for continuously producing a solid slurry according to the present invention comprises:

A reactor water level sensor for measuring the water level inside the high pressure reactor;

Supply member operation control means for stopping the operation of the supply member or reducing the supply flow rate of the supply member when the reactor water level is above a certain level;

A storage tank level sensor for measuring the level of the solid slurry in the storage tank; And

A discharge member operation control means for initiating operation of the discharge member or increasing the discharge flow rate of the discharge member when the storage tank level is above a certain level;

.

In this case, depending on the water level in the reactor, it is possible to control whether the supply member is operated or the process flow rate is increased or decreased. Further, it is possible to control whether the discharge member is operated or the process flow rate is increased or decreased according to the water level in the storage tank.

In yet another example, the apparatus for continuous production of a solid slurry according to the present invention comprises:

A reactor water level sensor for measuring the water level inside the reactor;

Supply member operation control means for starting the operation of the supply member or increasing the supply flow rate of the supply member when the reactor water level is below a certain level,

Exhaust member operation control means for initiating operation of the exhaust member or increasing the exhaust flow rate of the exhaust member when the reactor water level is above a certain level;

.

In this case, it is possible to control the operation of each of the supplying member and the discharging member, or the addition or subtraction of the treating flow rate, by measuring the level in the reactor.

In yet another example, the apparatus for continuous production of a solid slurry according to the present invention comprises:

A reactor pressure sensor for measuring a pressure inside the high-pressure reactor;

Supply member operation control means for stopping the operation of the supply member or reducing the supply flow rate of the supply member when the reactor pressure is above a certain level;

A storage tank level sensor for measuring the level of the solid slurry in the storage tank; And

Discharge member operation control means for initiating operation of the discharge member or increasing the discharge flow rate of the discharge member when the storage tank level is above a certain level;

.

In this case, depending on the pressure in the reactor, it is possible to control the operation of the supply member or the increase / decrease of the treatment flow rate. Further, it is possible to control whether the discharge member is operated or the process flow rate is increased or decreased according to the water level in the storage tank.

The liquid slurry, which is a reaction product in which the carbonization is completed in the reactor, flows out of the reactor. The effluent reactant enters the storage tank.

The reservoir containing the solid slurry may further include a gas separator for separating gas components from liquid and solid components. Further, a solid-liquid separator for separating the solid product and the liquid desorption liquid may be further formed at the rear end of the gas separator. In this case, the gas separator and the solid-liquid separator are continuously disposed.

On the inlet line of the reactor, a secondary reactor for preheating organic sludge may be formed. The auxiliary reactor serves to preheat the organic sludge and, if necessary, to pre-carbonize it. For example, the auxiliary reactor may preheat the organic sludge to a temperature of 50-150 ° C. Specifically, the auxiliary reactor preheats the organic sludge to a temperature in the range of 50 to 110 ° C, thereby preventing rapid temperature changes inside the reactor. Alternatively, the auxiliary reactor preheats the organic sludge to a temperature in the range of 120 to 150 ° C, thereby preliminarily or partially carbonizing the organic sludge. This has the effect of increasing the carbonization efficiency of the organic sludge in the reactor.

And a cooling device formed on the fluid line of the reactor and the discharge member. The liquid slurry flowing out of the reactor is at a high temperature of 170 to 180 ° C. If such a high-temperature solid slurry is directly injected into the discharge member, the discharge member may not normally operate. Concretely, the high-temperature solid slurry acts as a cause of lowering the durability of the means, and the high-temperature steam component contained in the solid slurry can stop the operation of the means.

The present invention also provides a continuous method for producing a solid slurry. In one example, the continuous method for producing a high-slurry slurry according to the present invention comprises heating and pressurizing an organic sludge in a reactor at a temperature of 150 to 210 ° C and a pressure of 15 to 50 bar to produce a carbonized slurry; And fluidizing the carbonized slurry from the reactor to a reservoir, and separating the solid product and the liquid desorption from the carbonized slurry. Specifically, the step of heating and pressurizing the carbonized slurry may be performed in a reactor at a temperature of 160 to 200 DEG C and a pressure of 17 to 25 bar, or a temperature of 170 to 190 DEG C and a pressure of 20 to 25 bar.

In the above manufacturing method, the process of fluidly moving the carbonized slurry from the reactor to the reservoir may be fluidly moved from the depressurized state to the reservoir via the section where the pressure is sequentially or continuously reduced along the fluid flow direction. Such fluid transfer can be effected, for example, by the discharge member, as described above, which is discharged from the reactor and which is described above.

Also, in the step of heating and pressurizing the organic sludge in a reactor having a temperature of 150 to 210 ° C and a pressure of 17 to 50 bar, the organic sludge is introduced into the reactor in a preheated state at a temperature of 50 to 150 ° C . Specifically, the organic sludge is preheated to a temperature ranging from 50 to 110 ° C, which prevents rapid temperature changes inside the reactor. Alternatively, the organic sludge is preheated to a temperature ranging from 120 to 150 ° C. In this case, the organic sludge is preliminarily or partially carbonized. This has the effect of increasing the carbonization efficiency of the organic sludge.

In one example, the step of fluidly moving the carbonized slurry from the reactor to a reservoir, and separating the solid product and the liquid desorption from the carbonization slurry comprises: a gas separation process for separating the gas component from the liquid and solid components; It is possible to carry out a solid-liquid separation process for separating the liquid desorption liquid.

Hereinafter, the present invention will be described with reference to the drawings, but the scope of the present invention is not limited thereto.

First, referring to FIG. 1, the reactor 107 of the present invention is a high-pressure reactor of a closed structure in which an inlet line and an outlet line are formed. The inside of the reactor (107) is equipped with stirring means. In the reactor (107), the reaction material flows in through the inflow line, and the reacted material through the outflow line flows out. The reactant flowing out through the outlet line of the reactor 107 is transferred to the storage tank 113a via the discharge member 112. [ The storage tank 113a may have a structure in which agitation means is provided therein. The reservoir 113a is a gas separator 113a for separating the gas component from the reactant and a solid-liquid separator 115 for separating the solid component and the liquid component from each other. The gas component separated in the gas separator 113a is discharged through the exhaust purifier 114. [ In the solid-liquid separator 115, the solid component and the liquid component are separated and discharged.

The discharge member 112 serves to continuously discharge reacted reactants in the reactor 107. The discharge member 112 is a decompression means including a section in which the pressure is sequentially or continuously reduced along the fluid flow direction inside the member. The discharge member 112 may be a structure in which the reactant flows out along the direction in which the screw rotates. Further, the discharge member 112 is designed, for example, to have a structure in which the inner diameters sequentially or continuously increase along the fluid flow, or to have a structure in which the pressure decreases sequentially or continuously along the fluid flow.

FIG. 2 is a schematic view of a continuous apparatus for producing a high-slurry slurry according to the present invention. 2, the sewage sludge flows into the sludge storage tank 101, and the sewage sludge stored in the sludge storage tank 101 flows into the reactor 107 via the supply member 102. The supply member 102 stops the operation of the supply member or reduces the supply flow rate of the supply member when the reactor water level is above a certain level. At this time, the reactor 107 is provided with a water level sensor for measuring the inside water level.

The auxiliary reactors 103a and 103b are located on the fluid flow of the supply member 102 and the reactor 107. [ If necessary, the auxiliary reactors (103a, 103b) have a structure in which two reactors are arranged in parallel. In the auxiliary reactors 103a and 103b, the sewage sludge is preheated to 70 to 80 ° C or preheated to 100 to 110 ° C.

The sewage sludge passed through the auxiliary reactors 103a and 103b flows into the reactor 107 while being pressurized in the range of 20 to 23 bar. In addition, the catalyst stored in the chemical reservoir 105 is added into the reactor 107 via the chemical pump 106. Sulfuric acid is used as the catalyst. If necessary, a separate heating oil heater 108 is provided on one side of the reactor 107. Through the heating oil heater 108, the reactor 107 is heated or maintained at a temperature. The inside of the reactor 107 is heated and pressurized in the range of 170 to 180 ° C and 19 to 23 bar. Under the heating and pressurizing conditions, the sewage sludge in the reactor 107 is carbonized, and is converted into a solid slurry containing the solid product and the liquid desorption liquid.

The reactants flow out through the outlet line of the reactor (107). The effluent reactant flows into the discharge member 112 through the first heat exchanger 109 and the second heat exchanger 110. The first heat exchanger 109 supplies the heat generated from the high-temperature reactant discharged from the reactor 107 to the auxiliary reactors 103a and 103b. If necessary, the first heat exchanger 109 supplies heat to the auxiliary reactors 103a and 103b through the thermal oil. In this case, the hot oil pump 104 is located between the first heat exchanger 109 and the auxiliary reactors 103a and 103b. In addition, a separate cooler 111 is formed on one side of the second heat exchanger 110. Through the second heat exchanger 110, the temperature of the reactant flowing into the discharge member 112 is cooled to a range of 60 to 70 ° C.

The reactant introduced into the discharge member 112 undergoes a process of being decompressed while passing through the discharge member 112. During passage through the discharge member 112, the pressure of the reactant is reduced to a level of atmospheric pressure (about 1 bar) at 20 to 23 bar. The discharge member 112 continuously discharges the reactants and at the same time lowers the pressure of the reactants sequentially or continuously along the fluid flow direction inside the member. The discharge member 112 stops the operation of the discharge member or reduces the discharge flow rate of the discharge member when the water level of the gas separator 113b is higher than a certain level. At this time, the gas separator 113b is provided with a water level sensor for measuring the inside water level.

The reactant passing through the discharge member 112 flows into the gas separator 113b for separating the gas component in the reactant. The reactant having the gas component separated through the gas separator 113b flows into the solid-liquid separator 115 again. In the solid separator 115, the reactants are separated into a solid product and a liquid desorption liquid. The solid product is introduced into a solid fuel molding machine and subjected to a molding process, and the liquid desorption liquid is discharged or reused.

3 is a perspective view including a partial cross-sectional view of the discharge member according to the present invention. The discharge member 112 is provided with a motor 10 at one side thereof and a drive shaft 11 connected to the motor 10 is formed and the drive shaft 11 rotates within the flow path 12. For example, a part of the drive shaft 11 may be curved in an S-shape, and the flow path 12 may include a region where the inner diameter of the flow path is widened and the narrowed region is repeated. The pressure is sequentially or continuously lowered as the reactant passes through the flow path 12 of the discharge member 112. [ At this time, the reactant is supplied to the inlet 20 on the right side and discharged to the outlet 30. In one example, reversal of the inlet 20 and outlet 30 is applicable to a supply member that increases in pressure sequentially or continuously.

10: Motor
11:
12: Oil in the discharge member
20: Exhaust member inlet
30: Exhaust member outlet
101: sludge storage tank
102: Supply member
103a, 103b: auxiliary reactor
104: Fruit pump
105: drug reservoir
106: Drug pump
107: Reactor
108: Fuel oil heater
109: first heat exchanger
110: second heat exchanger
111: cooler
112: discharge member
113a: Reservoir or gas separator
113b: gas separator
114: Exhaust gas purifier
115: high / liquid separator

Claims (14)

A high pressure reactor in which an inlet line and an outlet line are formed, an allowable internal pressure is 15 bar or more and a sealed type;
An auxiliary reactor for preheating or pre-carbonizing the organic sludge supplied through the inflow line of the high-pressure reactor;
A storage tank for storing a reactant flowing out of the high-pressure reactor;
A discharge member formed on the fluid line between the high-pressure reactor and the storage tank; And
And a heat exchanger formed on the fluid line between the high-pressure reactor and the discharge member and supplying heat generated from the high-temperature reactant discharged from the high-pressure reactor to the auxiliary reactor through the thermal oil,
The discharge member
An inlet line through which the reactant flows; And
An outlet line through which the reactant flows,
Based on the inlet pressure P ₁ ,
1/2 (P _1/2) in area of the inner pressure when the pressure inlet of the inlet line,
1/4 (P _1/4) in area of the inner pressure when the pressure inlet of the inlet line, and
1/8 (P _1/8) in area of the inner pressure, the pressure of the inlet line when the inlet
And a section that is continuously depressurized along the fluid flow direction inside,
Wherein the discharge member is formed with a drive shaft connected to a motor, and a part of the drive shaft includes an S-shaped bent shape.
A high pressure reactor in which an inlet line for introducing the organic sludge and an outlet line for discharging the reactant are formed;
A supply member fluidly connected to the inflow line of the high-pressure reactor to supply organic sludge;
An auxiliary reactor formed on the fluid line between the supply member and the high-pressure reactor, for preheating or pre-carbonizing the organic sludge supplied to the high-pressure reactor;
A discharge member fluidly connected to the outflow line of the high-pressure reactor to discharge the reaction product; And
A heat exchanger formed on the fluid line between the high-pressure reactor and the discharge member, for supplying heat generated from the high-temperature reactant discharged from the high-pressure reactor to the auxiliary reactor through the thermal oil; And
And a storage tank for storing a solid slurry containing a solid product and a liquid desorption liquid flowing out from the discharge member,
The discharge member is a decompression means including a section in which the pressure is continuously reduced along the fluid flow direction inside,
Wherein the discharge member is formed with a drive shaft connected to a motor, and a part of the drive shaft includes an S shape.
3. The method of claim 2,
Wherein the supply member is a pressurizing means including a section that is sequentially or continuously pressurized along the fluid flow direction inside.
3. The method of claim 2,
A reactor water level sensor for measuring the water level inside the high pressure reactor;
A supply member operation control means for starting operation of the supply member or increasing the supply flow rate of the supply member when the high-pressure reactor water level is below a certain level,
Discharge member operation control means for initiating operation of the discharge member or increasing the discharge flow rate of the discharge member when the level of the high-pressure reactor is higher than a certain level;
Wherein the slurry is a slurry.
3. The method of claim 2,
The storage tank for storing the solid slurry,
And a gas separator for separating the gas component from the liquid and solid components.
6. The method of claim 5,
At the downstream end of the gas separator,
Further comprising a solid-liquid separator for separating the solid product from the liquid desorption liquid.
The method according to claim 6,
Further comprising a cooling device formed on the fluid line of the high-pressure reactor and the discharge member.
Heating and pressurizing the organic sludge preheated to 50 to 150 DEG C in a secondary reactor in a high-pressure reactor at a temperature of 150 to 210 DEG C and a pressure of 15 to 50 bar to produce a carbonized slurry; And
Fluidly moving the carbonized slurry from the high-pressure reactor to a reservoir, and separating the solid product and the liquid desorption from the carbonized slurry,
The preheating of the organic sludge is performed by supplying heat recovered from the high-temperature carbonization slurry discharged from the high-pressure reactor to the secondary reactor via the thermal oil,
The process of fluidly moving the carbonized slurry from the high-pressure reactor to the reservoir,
A driving shaft connected to the motor is formed in a state in which the fluid is moved from the reduced pressure state to the storage tank through a section continuously reduced in pressure along the fluid flow direction and a part of the driving shaft is bent by an ejection member including an S- By weight based on the total weight of the solid slurry. delete delete delete delete delete delete

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