Thermal treatment device for removing odor from sewage sludge and solid fuel

Abstract

The present invention provides a heat treatment device for removing the odor of sewage sludge solid fuel, which includes: a main body, having a solid fuel feed port on one side of the upper part, an exhaust port on the other side of the upper part, and a solid fuel discharge port on one side of the lower part for discharging the above-mentioned solid fuel that has been heat-treated to the outside; a heat medium supply pipe, which is stacked in the height direction inside the above-mentioned main body and is arranged in a zigzag shape along the width direction and extended along the length direction, so as to heat-treat the above-mentioned solid fuel introduced into the interior of the above-mentioned main body through the above-mentioned solid fuel feed port to remove the odor; and a mesh conveyor, which is stacked in the height direction of the above-mentioned main body and extended along the length direction, and is used to place the above-mentioned solid fuel and transfer the above-mentioned solid fuel introduced into the interior of the above-mentioned main body along the length direction of the above-mentioned main body and along the space between the above-mentioned heat medium supply pipes.

Description

Technical Field

[0001] The present invention relates to a heat treatment device for removing the odor of sewage sludge solid fuel, and more specifically, to the following heat treatment device for removing the odor of sewage sludge solid fuel, that is, by supplying heat to the sewage sludge solid fuel to evaporate internal and external moisture and volatilize and remove odorous substances, thereby improving the durability and storage properties of the solid fuel by suppressing the decay and odor that may be generated by the solid fuel during transfer and storage, and increasing the calorific value. Background Art

[0002] Sludge refers to the sediment produced by separating suspended matter in water from liquid through water purification and sewage and wastewater treatment. Sewage sludge solid fuel refers to the fuel product prepared using sewage sludge.

[0003] Sewage sludge is generally disposed of by landfilling in the soil or dumping it into the ocean. However, with the entry into force of international conventions on the prevention of marine pollution, the dumping of sewage and wastewater sludge into the ocean has been banned. Therefore, composting, fuelization, solidification and other treatment methods are used. Among them, fuelization accounted for 48.2% in 2018. If the dry fuelization facilities currently under development are also put into operation, the proportion of fuelization will increase to 58.7%, becoming the largest treatment method.

[0004] Sewage sludge solid fuel is similar in quality and characteristics to wood pellets used as co-firing fuel in power plants. Therefore, it can be used as an alternative fuel to replace imported wood pellets. The power generation of sewage sludge solid fuel increased from 282,542MWh in 2015 to 338,143MWh in 2019, and the use of sewage sludge solid fuel in power plants is gradually increasing.

[0005] In addition, according to the carbon neutrality promotion strategy, the main source of energy will shift from fossil fuels to new energy and renewable energy, so the demand for new energy and renewable energy is expected to increase. Compared with solar energy, wind energy and other new energy and renewable energy sources with greater production instability and uncertainty, sewage sludge solid fuel has the advantage of being able to achieve stable supply.

[0006] Traditionally, foul odors have been generated during the storage and drying of sewage sludge, causing air pollution and complaints. Therefore, deodorization technologies are currently available to treat the odors generated during the drying and fuel conversion processes of sewage sludge.

[0007] However, there are currently no technical examples for reducing the odor generated by sewage sludge solid fuel, and its use is limited due to problems such as complaints and air pollution caused by the odor.

[0008] Therefore, the necessity of devices to solve such problems is becoming increasingly prominent. Summary of the Invention

[0009] The purpose of the present invention proposed in view of the above situation is to provide a heat treatment device for removing the odor of sewage sludge solid fuel, which can evaporate the internal and external moisture and volatilize the odorous substances by supplying heat to the solid fuel, thereby improving the durability and storage properties of the solid fuel by suppressing the decay and odor that may be generated by the solid fuel during transportation and storage, and increasing the calorific value.

[0010] The heat treatment device for removing the odor of sewage sludge solid fuel used to achieve the purpose of the present invention as described above is characterized in that it includes: a main body, having a solid fuel feed port on one side of the upper part, an exhaust port on the other side of the upper part, and a solid fuel discharge port on one side of the lower part for discharging the above-mentioned solid fuel that has been heat-treated to the outside; a heat medium supply pipe, stacked along the height direction inside the above-mentioned main body and arranged in a zigzag shape along the width direction and extended along the length direction, so as to heat-treat the above-mentioned solid fuel introduced into the interior of the above-mentioned main body through the above-mentioned solid fuel feed port to remove the odor; and a mesh conveyor, stacked along the height direction of the above-mentioned main body and extended along the length direction, for placing the above-mentioned solid fuel, and transferring the above-mentioned solid fuel introduced into the interior of the above-mentioned main body along the length direction of the above-mentioned main body and along the space between the above-mentioned heat medium supply pipes.

[0011] A waste gas discharge pipe communicating with the exhaust port may be provided on one side of the main body portion to discharge gas generated when the solid fuel is heat-treated through the heat medium supply pipe to the outside.

[0012] Furthermore, a plurality of first tar removal units may be provided on the lower side of the mesh conveyor for collecting and discharging to the outside the first time the tar components separated from the solid fuel placed on the mesh conveyor for conveyance.

[0013] In addition, a plurality of second tar removal parts connected to the exhaust gas discharge pipe and arranged upright along the height direction of the main body can be provided on the outer side of the main body for collecting and discharging the tar components contained in the exhaust gas to the outside for the second time.

[0014] Furthermore, a transfer screw for quantitatively transferring the solid fuel may be provided inside the solid fuel feed port on the upper side of the main body.

[0015] Moreover, a balancing adjustment plate may be provided between the upper inner surface of the main body near the solid fuel feed port and the mesh conveyor, one end of which is fixed to the upper inner surface of the main body and extends downward, and the other end is separated from the upper surface of the mesh conveyor by a specified distance, so that the solid fuel transported along the mesh conveyor is quantitatively stacked on the upper surface of the mesh conveyor.

[0016] Furthermore, a return screw may be provided at the rear end of the transport screw, and the return screw may be selectively driven to rotate in a direction opposite to or in the same direction as the rotation direction of the transport screw to control the supply amount of the solid fuel.

[0017] Furthermore, a temperature sensor and a timer may be provided on one side of the outer surface of the main body. The temperature sensor is used to measure the internal temperature of the main body increased by the heat medium supply pipe. The timer is used to measure the time for heat treatment of the solid fuel by the internal temperature of the main body.

[0018] As described above, the heat treatment device for removing odor from sewage sludge solid fuel of the present invention can evaporate internal and external moisture and volatilize odorous substances by supplying heat to the solid fuel, thereby having the effect of suppressing the decay and odor that may be generated by the solid fuel during transportation and storage.

[0019] In addition, it can also remove free water, physically bound water, non-combustible gas and some low-calorie volatiles on the surface of solid fuel to reduce the oxygen content, thereby having the effect of increasing the calorific value.

[0020] Furthermore, the removal of hydrophilic hydroxyl groups on the surface of the solid fuel reduces structural deformation caused by moisture, and the surface coating prevents moisture absorption, thereby improving the durability and storage properties of the solid fuel. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 The present invention is a front view showing the structure of a heat treatment device for removing odor from sewage sludge and solid fuel according to an embodiment of the present invention, as viewed from the front.

[0022] Figure 2 The present invention is a side view showing the structure of a heat treatment device for removing odor from sewage sludge and solid fuel according to an embodiment of the present invention.

[0023] Figure 3 The present invention is a top view showing the structure of a thermal treatment device for removing odor from sewage sludge and solid fuel according to an embodiment of the present invention.

[0024] Figure 4The present invention is a top view showing the internal structure of a solid fuel feed port of a thermal treatment device for removing the odor of sewage sludge solid fuel according to an embodiment of the present invention.

[0025] Explanation of symbols

[0026] 100: Main body, 110: Solid fuel feed port, 120: Exhaust port, 130: Solid fuel discharge port, 200: Heat medium supply pipe, 300: Mesh conveyor, 400: Exhaust gas discharge pipe, 500: First tar removal section, 600: Second tar removal section, 700: Transfer screw, 800: Balanced adjustment plate, 900: Return screw. DETAILED DESCRIPTION

[0027] Hereinafter, a heat treatment device for removing odor from sewage sludge and solid fuel according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

[0028] Figure 1 This is a front view showing the structure of a heat treatment device for removing odor from sewage sludge and solid fuel according to one embodiment of the present invention, as viewed from the front. Figure 2 This is a side view showing the structure of a heat treatment device for removing odor from sewage sludge and solid fuel according to an embodiment of the present invention, Figure 3 This is a top view showing the structure of a thermal treatment device for removing odor from sewage sludge and solid fuel according to one embodiment of the present invention. Figure 4 The present invention is a top view showing the internal structure of a solid fuel feed port of a thermal treatment device for removing the odor of sewage sludge solid fuel according to an embodiment of the present invention.

[0029] As shown in the figure, a heat treatment device for removing the odor of sewage sludge solid fuel according to an embodiment of the present invention includes: a main body 100, having a solid fuel feed port 110 on one side of the upper portion, an exhaust port 120 on the other side of the upper portion, and a solid fuel discharge port 130 on one side of the lower portion for discharging the heat-treated solid fuel to the outside; a heat medium supply pipe 200, which is stacked in the height direction and arranged in a zigzag shape in the width direction inside the main body 100 and extended in the length direction, so as to heat-treat the solid fuel introduced into the main body 100 through the solid fuel feed port 110 to remove the odor; and a mesh conveyor 300, which is stacked in the height direction of the main body 100 and extended in the length direction, and is used to place the solid fuel and transfer the solid fuel introduced into the main body 100 along the length direction of the main body 100 and along the space between the heat medium supply pipes 200.

[0030] The main body 100 is a rectangular component having a certain internal space. Its function is to heat the solid fuel using the heat generated by the heat medium supply pipe 200 when the solid fuel is accommodated in the internal space.

[0031] The main body 100 has a solid fuel feed port 110 on one side of its upper portion for feeding solid fuel to be heat-treated, and an exhaust port 120 on the other side of its upper portion for exhausting gas generated when the solid fuel is heat-treated.

[0032] The solid fuel feed port 110 may be formed singly at the upper edge of the main body 100 , and a plurality of exhaust ports 120 may be provided at a plurality of locations spaced apart on the upper surface of the main body 100 to rapidly discharge generated gas.

[0033] A solid fuel discharge port 130 for discharging the heat-treated and odor-free solid fuel to the outside is provided on one side of the lower portion of the main body 100 .

[0034] The heat medium supply pipe 200 is a component stacked in the height direction, arranged in a zigzag pattern in the width direction, and extended in the length direction inside the main body 100 to heat the solid fuel introduced into the main body 100 through the solid fuel feed port 110 to remove odor.

[0035] The heat medium supply pipe 200 is a tubular component stacked and arranged in a zigzag pattern along the width direction of the main body 100. In order to enable the heat medium passing through the heat medium supply pipe 200 to quickly increase the internal temperature of the main body 100, it is effective to arrange it in a zigzag pattern along the width direction of the main body 100 and extend it in the longitudinal direction.

[0036] An inlet and an outlet are formed at one end and the other end of the heat medium supply pipe 200, respectively, to supply and discharge the heat medium. The heat medium is supplied through the inlet, moves along the heat medium supply pipe 200, dissipates heat, and is discharged through the outlet. It is then fed into the heat medium boiler for heating and then supplied again.

[0037] The mesh conveyor 300 is stacked along the height direction of the main body 100 and extends along the length direction. It is used to place the above-mentioned solid fuel on the upper surface and transfer the above-mentioned solid fuel injected into the main body 100 along the length direction of the main body 100 and along the space between the heat medium supply pipes 200.

[0038] The mesh conveyor 300 is a plate-like member with a porous mesh-like structure formed on the plate surface. Driven by a mesh conveyor motor 310 provided on one side thereof, the mesh conveyor 300 forms a certain track and moves cyclically to transfer the solid fuel placed on the upper surface.

[0039] The mesh conveyor 300 is formed in a mesh shape with multiple holes on the plate surface. This is to separate the tar components contained in the solid fuel while transferring the solid fuel placed on the mesh conveyor 300 and collect them through the holes in the first tar removal unit 500 described below.

[0040] On the other hand, an exhaust gas discharge pipe 400 communicating with the exhaust port 120 is provided on one side of the main body 100 to discharge the gas generated when the solid fuel is heat-treated through the heat medium supply pipe 200 to the outside.

[0041] The exhaust gas discharge pipe 400 is composed of a plurality of auxiliary pipes whose one ends are directly connected to the exhaust port 120 and a single main pipe connected to the other ends of the branch pipes at a plurality of locations.

[0042] While the solid fuel is heat-treated by this structure, the gas generated inside the main body 100 is discharged to the outside of the main body 100 through multiple branch pipes, and then flows into the deodorization equipment side at one time through the main pipe connected to the above branch pipes.

[0043] A plurality of first tar removal units 500 are provided at the lower side of the mesh conveyor 300 for collecting and discharging the tar components separated from the solid fuel placed on the mesh conveyor 300 to the outside.

[0044] This first tar removal section 500 includes: a collection plate 510, which is arranged on the lower side of the mesh conveyor 300, and the central area is set at a position lower than the edge area so that the plate surface is inclined toward the center; and an oil removal pipe 520, which is connected to the lower part of the central area of the collection plate 510 and extends to the outside of the main body 100.

[0045] The upper surface of the collecting plate 510 forms a complete opening, so that the tar components that detach from the surface of the solid fuel placed on the upper surface of the mesh conveyor 300 and fall through the porous plate surface formed on the mesh conveyor 300 can move along the slope and gather in the middle area after falling on the collecting plate 510.

[0046] The tar components collected in the middle area of the collecting plate 510 are sucked to the outside of the main body 100 through the oil removal pipe 520 and discharged, thereby removing the tar components for the first time.

[0047] On one side outside the main body 100 , there are a plurality of second tar removal units 600 connected to the exhaust gas discharge pipe 400 and arranged upright along the height direction of the main body 100 for collecting and discharging the tar components contained in the exhaust gas to the outside for the second time.

[0048] The second tar removal unit 600 collects tar components contained in exhaust gas generated during the heat treatment of the solid fuel and discharges the collected tar components to the outside.

[0049] This second tar removal section 600 includes: a tar separation pipe 610, which is connected to the exhaust gas discharge pipe 400 and is uprightly arranged to allow the tar components separated from the exhaust gas to flow in; and a tar collecting plate 620, which is installed at multiple positions along the height direction of the tar separation pipe 610 to collect the tar components moving through the tar separation pipe 610.

[0050] On the other hand, a transfer screw 700 for quantitatively transferring the above-mentioned solid fuel is provided inside the solid fuel feed port 110 on the upper side of the main body 100, and a return screw 900 is provided at the rear end of the above-mentioned transfer screw 700, which can be selectively rotated and driven in the opposite direction or the same direction as the rotation direction of the above-mentioned transfer screw 700 to control the supply amount of the above-mentioned solid fuel.

[0051] The transport screw 700 is rotated by a transport screw motor 710 provided at one side, and transports the solid fuel introduced into the interior through the solid fuel feed port 110 and causes the solid fuel to fall to the mesh conveyor 300 .

[0052] When the amount of solid fuel transferred by the transfer screw 700 is excessive, the return screw 900 provided at the rear end of the transfer screw 700 rotates in the opposite direction to the rotation direction of the transfer screw 700 to return the solid fuel to the transfer screw 700 side.

[0053] When the amount of solid fuel transferred by the transfer screw 700 is appropriate, the return screw 900 rotates in the same direction as the rotation direction of the transfer screw 700 to drop the transferred solid fuel onto the upper surface of the mesh conveyor 300 .

[0054] In addition, there is a uniform adjustment plate 800 between the upper inner surface of the main body 100 near the solid fuel feed port 110 and the mesh conveyor 300, one end of which is fixed to the upper inner surface of the main body 100 and extends downward, and the other end is separated from the upper surface of the mesh conveyor 300 by a specified distance so that the above-mentioned solid fuel transferred along the mesh conveyor 300 is quantitatively stacked on the upper surface of the mesh conveyor 300.

[0055] The function of the distribution adjustment plate 800 is as follows: when the solid fuel placed on the upper surface of the mesh conveyor 300 passes through the distribution adjustment plate 800, the stacking height is adjusted to a state that is the same as the distance between the end of the distribution adjustment plate 800 and the upper surface of the mesh conveyor 300, thereby evenly distributing the transferred solid fuel.

[0056] Effectively, the equalizing adjustment plate 800 can adjust the stacking height of the solid fuel by adjusting the distance between the end portion and the upper surface of the mesh conveyor 300 to control the amount of solid fuel to be supplied.

[0057] Furthermore, although not shown, it is effective to provide a temperature sensor and a timer on one side of the outer surface of the main body 100. The temperature sensor is used to measure the internal temperature of the main body 100 that rises due to the heat medium supply pipe 200, and the timer is used to measure the time for the above-mentioned solid fuel to be heat-treated by the internal temperature of the main body 100.

[0058] The temperature sensor can be used to measure the internal temperature of the main body 100 so as to maintain the internal temperature of the main body 100 at a desired temperature, and the timer can be used to measure the time for heat treatment of the solid fuel, thereby achieving accurate heat treatment of the solid fuel.

[0059] Hereinafter, a process of heat-treating solid fuel using the heat treatment apparatus for removing odor of sewage sludge solid fuel according to one embodiment of the present invention having the above-described structure will be described.

[0060] First, if solid fuel that needs to be heat treated is added through the solid fuel feed port 110 set on one side of the main body 100, as the transfer screw 700 rotates, the solid fuel is transferred to the side of the return screw 900. The return screw 900 rotates in the same direction as the transfer screw 700, placing the solid fuel on the upper surface of the mesh conveyor 300 and transferring it in a stacked form along the mesh conveyor 300.

[0061] When the stacked solid fuel passes through the equalization adjustment plate 800 while being conveyed by the mesh conveyor 300 , the stacking height is adjusted to the same level, thereby enabling continuous quantitative supply of the solid fuel.

[0062] When the heat medium passes through the heat medium supply pipe 200 , the interior space of the main body 100 is heated to a predetermined temperature. In this case, the temperature of the interior space should be 200° C. to 250° C., preferably, the effective temperature is 230° C.

[0063] The solid fuel is heat-treated inside the heated main body 100 while being conveyed by the mesh conveyor 300 . In this case, a heat treatment time of about 30 minutes is most effective.

[0064] While the solid fuel is being transferred along the mesh conveyor 300 , the tar components adhering to the surface are separated and removed by the first tar removal unit 500 . The waste gas generated during the heat treatment is discharged to the outside through the waste gas discharge pipe 400 .

[0065] Furthermore, the tar components contained in the exhaust gas are collected in the second tar removal unit 600 and further removed during the process of flowing along the exhaust gas discharge pipe 400 for exhaust, thereby completing the heat treatment of the solid fuel.

[0066] The heat treatment device for removing the odor of sewage sludge solid fuel with the above structure can evaporate the internal and external moisture and volatilize the odorous substances by supplying heat to the solid fuel, thereby improving the durability and storage properties of the solid fuel by inhibiting the decay and odor that may be generated by the solid fuel during transportation and storage, and increasing the calorific value.

[0067] The above only describes some preferred embodiments implemented according to the present invention. It is well known that the scope of the present invention should not be interpreted as being limited to the above embodiments, and technical ideas that are homologous to the technical ideas of the present invention described above are all included in the scope of the present invention.

Claims

1. A thermal treatment device for removing the malodor of sewage sludge and solid fuel, characterized in that: include: The main body (100) has a solid fuel feed port (110) on one side of the upper portion, an exhaust port (120) on the other side of the upper portion, and a solid fuel discharge port (130) on one side of the lower portion for discharging the heat-treated solid fuel to the outside; a heat medium supply pipe (200) stacked in the height direction and arranged in a zigzag pattern in the width direction inside the main body (100) and extending in the length direction, so as to heat-treat the solid fuel fed into the main body (100) through the solid fuel feed port (110) to remove odor; and The mesh conveyor (300) is stacked along the height direction of the main body (100) and extended along the length direction, and is used to place the solid fuel, and to transfer the solid fuel put into the interior of the main body (100) along the length direction of the main body (100) and along the space between the heat medium supply pipes (200). An exhaust gas discharge pipe (400) is provided on one side of the main body (100) and is connected to the exhaust port (120). The exhaust gas discharge pipe (400) can discharge the gas generated when the solid fuel is heat-treated through the heat medium supply pipe (200) to the outside. A plurality of first tar removal units (500) are provided on the lower side of the mesh conveyor (300) for collecting and discharging the tar components separated from the solid fuel placed on the mesh conveyor (300) for the first time to the outside. On one side of the exterior of the main body (100), there are a plurality of second tar removal sections (600) connected to the exhaust gas discharge pipe (400) and arranged upright along the height direction of the main body (100), for collecting and discharging the tar components contained in the exhaust gas to the outside for a second time.

2. The thermal treatment device for removing the malodor of sewage sludge solid fuel according to claim 1, characterized in that: A transfer screw (700) for quantitatively transferring the solid fuel is provided inside the solid fuel feed port (110) on the upper side of the main body (100).

3. The thermal treatment device for removing the malodor of sewage sludge solid fuel according to claim 2, characterized in that: A balancing adjustment plate (800) is provided between the upper inner surface of the main body (100) near the solid fuel feed port (110) and the mesh conveyor (300), one end of which is fixed to the upper inner surface of the main body (100) and extends downward, and the other end is separated from the upper surface of the mesh conveyor (300) by a specified distance, so that the solid fuel transferred along the mesh conveyor (300) is quantitatively stacked on the upper surface of the mesh conveyor (300).

4. The thermal treatment device for removing the malodor of sewage sludge solid fuel according to claim 2, characterized in that: A return screw (900) is provided at the rear end of the transport screw (700), which can be selectively driven to rotate in a direction opposite to or the same as the rotation direction of the transport screw (700) to control the supply amount of the solid fuel.

5. The thermal treatment device for removing the malodor of sewage sludge and solid fuel according to any one of claims 1, 2 to 4, characterized in that: A temperature sensor and a timer are provided on one side of the outer surface of the main body (100). The temperature sensor is used to measure the internal temperature of the main body (100) increased by the heat medium supply pipe (200), and the timer is used to measure the time for heat treatment of the solid fuel by the internal temperature of the main body (100).

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