KR101620337B1 - Sludge Drying Apparatus with Injection nozzle and Crush plate - Google Patents

Abstract

The present invention relates to a sludge drying apparatus having a spray nozzle and a crush plate, and more particularly, to a sludge drying apparatus having a spray nozzle and a crush plate, and more particularly, To a sludge drying device for shortening the drying time.
The sludge drying apparatus of the present invention comprises a pump for supplying a predetermined amount of organic sludge which has been mechanically dewatered, a preheater for preheating the sludge supplied from the pump, and a drier for drying preheated sludge, The dryer includes a main body having a horizontal cylindrical body; A spray nozzle formed inside the main body and spraying preheated sludge into the main body; A crushing plate installed in the spraying direction of the preheated sludge and colliding with sludge sprayed on one side to discharge and separate internal water by cell wall crushing; A heating screw for heating the discharged solid material while moving the solid material in one direction so as to perform drying; A dewatering outlet formed at a lower portion of the main body and discharging the separated inner water and the dried solids; A plurality of drying gas nozzles provided on an inner wall of the main body for spraying high temperature dry gas onto the discharged solid matter, And a waste gas discharge port formed at an upper end of the main body to discharge waste gas mixed with dry gas and moisture evaporated from the solid matter to the outside.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a sludge drying apparatus having an injection nozzle and a crushing plate,

The present invention relates to a sludge drying apparatus having a spray nozzle and a crush plate, and more particularly, to a sludge drying apparatus having a spray nozzle and a crush plate, and more particularly, To a sludge drying device for shortening the drying time.

The increase of the national income led to the diversification, the higher quality and the mass production of the production and consumption activities of the members of society. Especially, the consumption of meat through the change of the dietary culture was greatly increased and the sewerage that occurred was increased.

As a result, the livestock industry including pigs, chickens, cattle, etc. has been enlarged with the increase of the number of rearing to meet the demand, and the animal manure generated by the development of the livestock industry is discharged to 45 million tons per year in Korea alone .

In recent years, marine dumping of organic wastes to livestock manure and sewage sludge has been prohibited by the Marine Pollution Prevention Act. Therefore, the treatment of livestock manure and sewage sludge that occur is social This is a big problem.

First, the treatment of livestock manure is performed by discharging marine, treatment using public facilities, and composting using moisture control materials such as sawdust and rice hull. In other words, livestock manure can contribute to eco-friendly agriculture such as soil improvement (physics, chemistry, biology) in addition to pure fertilizer function. However, in order to compost the composting, it takes a long time for fermentation and a place for loading compost is needed. It is not suitable for large-scale treatment such as a treatment facility for treating generated gas and odor, and it is used only as solid fuel contained in livestock manure, but it takes a long time to dry. That is, since the generated animal manure contains a large amount of water, the dewatering and drying process is indispensable to reprocess it, and a large amount of energy is consumed while performing the above process.

Next, even in the case of sewage sludge, the sewage sludge contains 80% of organic matter consisting mainly of protein, fat, celluloses and carbohydrates, and 20% of inorganic matter (ash) capable of being used as building material. It is about 5,000kcal / kg, which is similar to the calorific value of domestic anthracite. Therefore, it can be used as an energy source. Minerals can be used as asphalt filler, buried filler, and lightweight aggregate. This sewage sludge is also similar to livestock manure through a dehydration process in which a solid material having a low water content is taken as a first order, and the received solid material is dried to receive solid fuel and used as fuel. However, There is a drawback that energy is consumed.

As described above, the sludge including livestock manure and sewage sludge receives the dried solid material by performing a dehydration process and a drying process to lower the water content. In other words, after dehydration by mechanical method, moisture content is reduced to 10 ~ 20% by typical hot air drying method.

For example, the water present in the organic sludge is divided into free water and internal water located inside the cell wall of the organic material. The free water can be dehydrated by a general mechanical method, but the internal water is dehydrated well by a mechanical system Drying can be performed by a high-temperature drying method or an incineration method.

Therefore, in order to receive solid materials usable as a fuel, it is necessary to dry the inner water to lower the water content. However, since the drying time is long and energy is consumed by the basic method, a new drying method for lowering the water content is studied It is necessary.

The sludge drying apparatus of the present invention for solving the above-

The present invention aims to provide a device capable of providing a cell wall disruption function at a low cost by simplifying the structure of destroying the cell wall by reducing the amount of energy consumed in drying by rapidly drying the cell wall of the organic material sludge by discharging the internal water, .

According to an aspect of the present invention, there is provided a sludge drying apparatus comprising:

A sludge drying apparatus comprising a pump for supplying a predetermined amount of organic sludge with mechanical dehydration, a preheater for preheating sludge supplied from the pump, and a drier for drying preheated sludge, A body; A spray nozzle formed inside the main body and spraying preheated sludge into the main body; A crushing plate installed in the spraying direction of the preheated sludge and colliding with sludge sprayed on one side to discharge and separate internal water by cell wall crushing; A heating screw for heating the discharged solid material while moving the solid material in one direction so as to perform drying; A dewatering outlet formed at a lower side of a side of the one end of the main body where the crushing plate is formed and discharging the separated inner water; A solids discharge port formed at an end of the main body opposite to the dehydration outlet for discharging the dried solids; A plurality of drying gas nozzles provided on an inner wall of the main body for spraying high temperature dry gas onto the discharged solid matter, And a waste gas outlet formed at an upper end of the main body and discharging waste gas mixed with dry gas and moisture evaporated in the solid matter to the outside.

The injection nozzle injects the preheated sludge at a pressure of 15 to 25 bar and the crushing plate is formed at an angle of 60 to 85 degrees with respect to the spraying direction of the nozzle so that the cell wall is broken by the impact that the injected sludge bumps against the crushing plate .

The sludge drying apparatus of the present invention by the above-

When the preheated sludge is introduced into the dryer, it is sprayed with high pressure by the crushing plate to crush the cell wall of the organic sludge by the impact, thereby discharging the internal water, thereby lowering the water content of the object to be dried. . Therefore, it is possible to simultaneously increase the dry throughput and dryness of the sludge having a high moisture content without increasing the equipment, and to provide a useful device It has become possible to provide

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is an overall schematic view of a sludge drying apparatus according to the present invention; Fig.
2 is a schematic sectional view showing a dryer of a sludge drying apparatus according to an embodiment of the present invention.
3 is an enlarged view of a portion A in Fig.
4A to 4C are cross-sectional views illustrating a dryer according to an embodiment of the present invention.
5 is a cross-sectional view of a dryer according to another embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail with reference to the accompanying drawings. It should be understood, however, that the appended drawings illustrate only the contents and scope of technology of the present invention, and the technical scope of the present invention is not limited thereto. It will be apparent to those skilled in the art that various changes and modifications can be made within the scope of the technical idea of the present invention based on these examples.

2 is a schematic cross-sectional view showing a dryer of a sludge drying apparatus according to an embodiment of the present invention, and Fig. 3 is an enlarged view of a portion A of Fig. 2. Fig.

The sludge drying apparatus 10 includes a pump 20 for supplying a predetermined amount of organic sludge that has been mechanically dewatered, a preheater 30 for preheating the sludge supplied from the pump, a drier 40 for drying preheated sludge ).

The pump 20 has a hopper capable of temporarily storing sludge having a water content of 80 to 90% by mechanical dewatering. Typically, the pump 20 has a mono pump. In addition, various pumps capable of supplying a stored sludge at a high pressure Can be used. The pump 20 is connected to the pre-heater 30 through a sludge supply pipe 50 so that the sludge discharged from the pump is supplied to the pre-heater.

Next, the preheater 30 is a vertical tube, and its interior is divided into a lower inlet portion 31, an intermediate heat exchanger portion 32, and an upper outlet portion 33.

The lower inlet 31 is formed in a conical shape with its lower end communicating with the sludge supply pipe 50 and having an upper portion expanded to receive sludge from the sludge supply pipe.

The upper discharge portion 33 is communicated with a preheat sludge conveying pipe 60 for discharging the preheated sludge, and the lower portion is formed into a conical shape facing the extended lower introduction portion.

The heat exchanging part 32 positioned between the lower inlet part 31 and the upper outlet part 33 has a space separated from the lower inlet part and the upper outlet part so that the lower inlet part and the upper outlet part are separated from each other, (34). In other words, the intermediate heat exchanging part (32) separated from the lower introduction part and the upper exhaust part is provided with a plurality of base pipes (34) therein, so that both ends of the base pipe communicate with the lower introduction part and the upper exhaust part, So that the introduced sludge is transferred to the discharge portion 33 through the canal 34.

In addition, the waste heat transfer tube (70) communicates with the upper side surface of the intermediate heat exchanger (32), causing the waste gas having a high temperature to move downward through the outer space of the canister (34) . Accordingly, the sludge is moved upward through the inside of the plurality of tanks 34, and the high-temperature waste gas is discharged to the outer spaces of the plurality of tanks, thereby discharging the sludge and the waste gas. In the middle heat exchanging unit 32, Is performed to raise the temperature of the sludge and lower the temperature of the waste gas so that the discharge is made.

A plurality of baffles 321 may be horizontally disposed in the heat exchanging part 32 to increase the contact area with the waste gas, thereby facilitating the heat transfer to the bare tube, thereby increasing the heat exchange efficiency.

The temperature of the waste gas flowing into the pre-heater (30) may be increased according to the performance of the dryer, but it is generally in the range of 100 to 130 ° C., and the sludge discharged from the heat exchanger Temperature. The temperature of the waste gas may be provided in a higher temperature range than the above-mentioned range, but it is preferable that the waste gas is operated to be discharged in the above range in terms of thermal efficiency. Further, the preheating temperature of the sludge can be controlled to be higher than the above range by controlling the moving speed of the preheater, but if the moving speed (or the supply amount) is lowered, the throughput of the drier is lowered, Do.

The dryer (40) receives preheated sludge from the preheater (30) through a preheating sludge conveying pipe (60) and performs drying.

The dryer 40 includes a main body 41 having a horizontal cylindrical body, a spray nozzle 42 for spraying preheated sludge into the main body, a sludge spraying unit 40 installed in the spray direction of the preheated sludge, And a crushing plate 43 for separating and discharging the inner water by crushing the cell wall.

The injection nozzle 42 is installed at the end of the preheating sludge conveying pipe 60 so as to inject the preheated sludge conveyed at a high pressure and adjust the injection pressure of the injection nozzle by an intermittent valve provided on the flow path of the preheating sludge conveying pipe do. When the preheating temperature of the sludge is 20 to 30 ° C., the injection pressure is 15 to 25 bar. When the temperature of the sludge rises at room temperature, the binding force between the sludge tissues is loosened so that the cell wall can be broken even with a small impact. In this case, when the injection pressure is 15 bar or less, the cell wall is not broken easily due to low pressure. It is desirable that the device structure emphasis by high pressure should be increased and the effect of enhancing cell wall breakage is also insufficient, so that it is preferable to inject at a pressure within the above range.

The crushing plate 43 is disposed in a direction to be sprayed by the injection nozzle 42. The crushing plate 43 collides with the sprayed sludge so that the cell wall is broken and the inner water is separated and discharged.

That is, as shown in the drawing, the spray nozzle 42 is installed in the upper part of the main body 41 so as to spray toward the rear part of the main body 41, and the crush plate 43 is made of the sludge And is extended to a direction in which it is sprayed. The crushing plate 43 may have a plurality of projections formed on the front surface where the sludge collides with the sludge so that the collided sludge can be easily separated.

The crushing plate 43 is spaced apart from the spraying direction by a predetermined angle so that the sludge can be separated from the crushing plate immediately after crushing. The crushing plate is formed at an angle of 60 to 85 degrees with respect to the spraying direction of the injection nozzle.

When the crushing plate 43 is disposed at an angle of 60 ° or less with respect to the spraying direction, the high-pressure injected sludge is only changed in the direction of spraying by the crushing plate, and the strength against the crushing plate is low, It is poorly transferred to the cell wall and the internal water is not separated because the crushing is not done well.

In addition, if the crushing plate is disposed at an angle of 85 ° or more, the injection direction and the crushing plate are formed at a right angle or at an angle close to the crushing plate so that the crushing plate collides with the crushing plate, It is preferable to dispose the crushing plate within the above range because the material which is injected into the crushing plate interferes with the progress of the sludge injected by the crushing plate to lower the crushing force due to the collision.

The injection nozzle 42 and the crushing plate 43 are installed on the upper side of the main body 41 so that the inner and outer wastes discharged from the crushing cell walls are discharged from the crushing plate It can be easily removed.

The drying unit 40 is provided with a heating screw 44 inside the main body 41 so that the solid matter discharged from the crushing plate 43 can be dried while being moved to one side.

The heating screw 44 is heated to a high temperature by heating the wing of the heating screw to receive a gas heated by high temperature (for example, steam) and heating the internal temperature of the dryer to evaporate the residual moisture of the solid matter , The heat of the heating screw blades can be transferred to the solids while the solids are moved to one side to dry the solids. In addition, a plurality of stirring projections may be axially protruded on the wing surface of the heating screw so that the solids that are moved by rotating the solids while being rotated may be evenly dried.

A portion of the lower part of the main body, which is the inlet side where the injection nozzle 42 and the crushing plate 43 are formed, is formed in the dryer 40 by forming a perforated plate or a plurality of through holes to allow the inner water and other water, And a dewatering outlet 45 for discharging the liquid to the outside of the main body through the through hole. That is, the inner water discharged from the cell wall is discharged to the outside through the dehydrating outlet 45, and only the remaining solid material is moved to one side by the heating screw 44 to dry the water, So that the drying efficiency can be increased.

In the main body 41 of the dryer, a solids discharge port 46 is formed in a lower or forward side wall of the main body on the outlet side, which is the direction in which the dried solids progress, so that the dried solids can be discharged. At this time, a separate temporary storage chamber may be further formed in the solids discharge port 46 and connected to the outside by an opening / closing valve such as a knife gate valve.

The main body 41 may further include a drying gas nozzle 47. The drying gas injection port 47 is formed on the inner wall of the main body so as to be dried by introducing hot dry gas. The drying gas transfer pipe 80 is introduced into the main body, and a plurality of dry gas injection openings 47) are formed so that the drying gas is supplied or a heating jacket is provided on the outside and a plurality of drying gas jet nozzles are formed on the wall surface of the main body so that the drying gas supplied to the heating jacket flows into the main body through the drying gas jet opening . The dry gas injection port is formed at an upper portion of the main body and a main body of the main body so as not to be loaded with solids so as to allow the dry gas to flow therein. When the dry gas is introduced through the dry gas transfer pipe 80, 44) so that the drying gas is supplied without hindering the driving of the heating screw.

The main body 41 is further provided with a waste gas outlet 48 at an upper portion of the outlet side to discharge the waste gas in which the dry gas that has dried the solid material and the moisture that has evaporated by the dry gas to the outside, To increase the drying efficiency of the solids. That is, the high-temperature drying gas introduced through the plurality of drying gas injection openings 47 heats the solid matter in the main body to evaporate the remaining water, and the high humidity dry gas containing the evaporated moisture The water evaporated by the dry gas is quickly discharged to dry the solid body by keeping the inside of the body in a dried state. The waste gas outlet (48) communicates with the waste gas transfer pipe (70) and supplies the discharged waste gas to the preheater to preheat the sludge flowing into the dryer.

The main body 41 of the dryer 40 of the present invention may be formed as a double pipe in which an outer pipe 411 and an inner pipe 412 are installed.

FIG. 4A is a cross-sectional view showing an axial longitudinal section of the dryer according to the embodiment of the present invention, and FIGS. 4B and 4C are cross-sectional views taken along line B-B and C-C in FIG.

The main body 41 of the dryer is constituted of an inner tube 412 and an outer tube 411 to form a heating chamber 413 between the inner tube and the outer tube to receive the hot drying gas, 412 may be heated. In addition, the inner pipe 412 may be formed with a plurality of dry gas jet openings 47 formed on the upper surface thereof to allow the hot dry gas of the heating chamber 413 to flow into the inner pipe.

The preheated sludge conveying pipe 60 for conveying the preheated sludge is piped by extending the heating chamber 413 from the inlet side of the main body 41 to the inner pipe 412 at the inlet side of the main body 41. The preheated sludge conveyer pipe 60, and a crushing plate 43 extending from the inner pipe, so that the preheated sludge injected from the injection nozzle collides with the crushing plate to generate shock waves, So that the internal water is separated and discharged.

The space between the outer tube 411 and the inner tube 412 is partitioned by the partition plate 414 in the lower space on the main body inlet side where the cell walls of the sludge are broken, separately from the space between the heating chamber 413 and the inner tube 412 The collected water and the surplus water separated and separated by forming the collecting chamber 415 are collected and quickly discharged to the outside through the dewatering outlet 45 formed in the outer pipe 411 so that the amount of water to be dried Can be minimized.

In addition, the dried solid material is directly discharged from the inner pipe to the outside by being moved by the heating screw 44 to the outlet side end portion which is the other side end portion opposed to the inlet side end portion communicating with the preheating sludge conveying pipe 60 in the main body 41 A solid material discharge port 46 is formed.

In the dryer of the present invention, a heating jacket (49) may be additionally provided on the main body so that heating can be performed.

5 is a cross-sectional view showing a vertical section of a dryer according to another embodiment of the present invention.

As described above, the dryer 40 of the present invention may further include a heating jacket 49.

In the dryer 40, a heating jacket 49 is installed to surround the outer surface of the main body 41 in an intermediate portion, which is a section where the solids are dried except for both ends of the inlet and outlet sides of the main body 41, Heat can be transmitted. The high temperature drying gas is supplied to the heating chamber 491 formed by the heating jacket 49 to heat the wall of the main body forming the heating chamber to heat the solids of the main body to dry.

A plurality of dry gas jet openings 47 are formed in the upper wall of the main body 41 forming the heating chamber 491 so that the drying gas in the heating chamber 491 flows into the main body 41 Heat is transferred directly to the solids to allow drying.

In addition, a preheated sludge conveying pipe 60 is communicated at one end of the main body of the main body without the heating jacket 49 wrapped thereon, and a dehydrating outlet 45 is formed at a lower portion thereof. 48 are formed in the lower part of the body, and a solid material discharge port 46 is formed in the lower part.

The preheated sludge introduced into the inlet side of the main body 41 through the preheating sludge conveying pipe 60 is discharged to the crushing plate 43 at a high pressure through the injection nozzle 42. The discharged sludge is discharged from the cell wall And the internal water is separated and discharged by crushing by the impact against the crushing plate.

The separated inner water is discharged to the outside through the lower dehydrating outlet 45. The separated solid material is moved by the heating screw 44 and passes through the section where the heating jacket 49 is covered.

The moving solids are dried by evaporation of residual moisture by heat generated by the heat transferred through the heating screw 44 and the inner wall of the main body 41 and the drying gas introduced through the drying gas jet opening 47.

The dried solids are discharged through the solids discharge port 46. The evaporated moisture is discharged through the waste gas discharge port 48 by the blowing of the dry gas and the discharged waste gas is passed through the waste gas transfer pipe 70 to the preheater 30 And the sludge is preheated by heat exchange with the sludge supplied to the dryer 40, and then discharged through a rear end process.

When the preheated sludge is injected at a high pressure by the crushing plate 43, the cell walls of the organic matter contained in the sludge are broken by the shock wave colliding with the crushing plate and the internal water is separated and discharged. The amount of energy consumed in drying can be reduced by drying.

10: Drying device
20: Pump
30: preheater
31: introduction part 32: heat exchange part
33: discharge part 34:
40: dryer
41: main body 42: injection nozzle
43: crushing plate 44: heating screw
45: Dewatering outlet 46: Solid outlet
47: Dry gas nozzle 48: Waste gas outlet
49: heating jacket
411: outer tube 412: inner tube
413, 491: Heating chamber 414:
415: collection chamber
50: sludge supply pipe
60: preheated sludge conveyor
70: waste gas pipeline

Claims (4)

A sludge drying apparatus comprising a pump (20) for supplying a predetermined amount of organic sludge with mechanical dehydration, a preheater (30) for preheating sludge supplied from the pump, and a drier (40) for drying preheated sludge,
The dryer (40)
A main body 41 formed of a horizontal cylindrical body; A spray nozzle (42) formed on the upper side of the main body and spraying the preheated sludge toward the inside of the main body at a pressure of 15 to 25 bar; A crushing plate (43) installed at an angle of 60 to 85 ° with the direction of spraying of the preheated sludge which is the spray direction of the preheated sludge and colliding with the sludge sprayed on one side so that the inner water is separated and discharged by cell wall crushing; A heating screw (44) for moving the solid material discharged from the internal water in one direction so as to apply heat to perform drying; A dewatering outlet 45 formed at a lower side of a side of the one end of the main body where the crushing plate is formed and discharging the separated internal water; A solid outlet 46 formed at the lower end of the main body opposite to the dehydrating outlet for discharging the dried solid material; A plurality of dry gas injection openings 47 installed on the inner wall of the main body for spraying high temperature dry gas onto the discharged solid material and drying the dry gas; And a waste gas discharge port (48) formed at an upper end of the main body and discharging waste gas mixed with dry gas and moisture evaporated from the solid substance to the outside,
The main body 41 of the dryer 40 is formed of a double tube in which an outer tube 411 and an inner tube 412 are formed to allow the heating chamber 413 to be formed,
The inner tube 412 has a plurality of through holes formed in the upper surface thereof so as to be used as a drying gas jet opening 47 for introducing the hot dry gas from the heating chamber into the inner tube 412,
The lower space on the body inlet side where the sludge is broken in the space between the outer tube and the inner tube is formed into a collection chamber 415 partitioned from the heating chamber by the partition plate 414, A plurality of through holes are formed so that the internal water separated and discharged through the through holes is collected in the collection chamber and the collected internal water is discharged to the outside through the dewatering outlet 45 formed in the external pipe 411,
And the solids discharge port (46) communicates with the outside from the inner pipe (412) to discharge the solids directly to the outside.
delete delete delete

Images