A typical hazardous waste incineration ash, slag inductively melted processing system

Abstract

This invention discloses a typical inductive melting treatment system for hazardous waste incineration ash and slag, comprising: an inductive self-heating melting furnace, a constant-temperature water-cooled slag discharge machine, a fume hood, a water-cooled movable sealing cover, and a ladle rotary flow channel. The water-cooled movable sealing cover is slidably fitted onto the fume hood, and the ladle rotary flow channel rotates via a rotating mechanism. When the ladle rotary flow channel is parallel to the slag and molten metal chute, the water-cooled movable sealing cover is raised, and the inductive self-heating melting furnace begins to rotate, pouring slag through the slag and molten metal chute into the constant-temperature water-cooled slag discharge machine. When the ladle rotary flow channel is perpendicular to the slag and molten metal chute, the water-cooled movable sealing cover is raised, and the inductive self-heating melting furnace begins to rotate, pouring molten metal through the slag and molten metal chute into the ladle rotary flow channel, which then flows into the ladle through the outlet of the ladle rotary flow channel. This invention simplifies the operation of pouring molten slag, requires low worker skill levels, and eliminates the time required for raising and lowering the furnace body during pouring.

Description

Technical fields:

[0001] This invention relates to the field of hazardous waste incineration ash and slag treatment technology, and in particular to a typical hazardous waste incineration ash and slag inductive melting treatment system that performs high-temperature melting treatment on hazardous waste incineration ash and slag to achieve harmlessness, volume reduction and resource utilization. Background technology:

[0002] Electromagnetic induction melting furnaces have advantages such as fast heating speed, good energy-saving effect, and small flue gas volume. They can also heat non-magnetic materials by heating through a specific crucible. Compared with oxygen-enriched side-blown furnaces, plasma furnaces, and resistance furnaces, they have obvious advantages in high-temperature melting of ash and slag from hazardous waste incineration. However, the operation process of pouring molten slag is complicated, requiring high technical skills from workers. In addition, the furnace body needs to be raised and lowered during the pouring process, which takes up a lot of time and affects the speed of the promotion of this technology. Summary of the Invention

[0003] The technical problem to be solved by this invention is to provide a typical hazardous waste incineration ash and slag induction melting treatment system that is simple to operate, requires high skill level of workers, and takes a lot of time to raise and lower the furnace body during the pouring process, which affects the speed of the promotion of this technology.

[0004] To achieve the above-mentioned objectives, the typical hazardous waste incineration ash and slag inductive melting treatment system of the present invention includes:

[0005] An inductive self-heating melting furnace is installed on an installation platform via a tilting mechanism, and a slag and molten metal chute is provided on the top of the inductive self-heating melting furnace.

[0006] A constant-temperature water-cooled slag discharge machine is configured next to the inductive self-heating melting furnace;

[0007] A fume hood is installed above the inductive self-heating melting furnace. The fume hood, the weighing hopper, the frequency converter metering feeder, and the vibrating feeder are mounted on another platform. A feeding channel is provided inside the fume hood. The feeding channel is relatively long and runs through the entire fume hood. The feeding port of the feeding channel extends from the top of the fume hood, and the discharge port of the feeding channel is located at the bottom of the fume hood, aligned with the furnace opening of the inductive self-heating melting furnace.

[0008] A water-cooled movable sealing cover; the water-cooled movable sealing cover is disposed above the inductive self-heating melting furnace and slidably sleeved on the smoke collection hood; the water-cooled movable sealing cover is raised and lowered by a lifting mechanism; when the water-cooled movable sealing cover falls to the lowest position, the bottom of the water-cooled movable sealing cover is in sealed contact with the installation platform of the inductive self-heating melting furnace and covers the inductive self-heating melting furnace.

[0009] A ladle rotary flow channel is configured next to the constant-temperature water-cooled slag discharge machine. The ladle rotary flow channel is mounted on a ladle rotary flow channel support via a rotating mechanism. When the ladle rotary flow channel is parallel to the molten slag and molten metal chute, the water-cooled movable sealing cover is raised, and the inductive self-heating melting furnace begins to rotate and pour molten slag into the constant-temperature water-cooled slag discharge machine through the molten slag and molten metal chute. When the ladle rotary flow channel is perpendicular to the molten slag and molten metal chute, the water-cooled movable sealing cover is raised, and the inductive self-heating melting furnace begins to rotate and pour molten metal into the ladle rotary flow channel through the molten slag and molten metal chute. The molten metal entering the ladle rotary flow channel flows into the ladle through the outlet of the ladle rotary flow channel.

[0010] In a preferred embodiment of the present invention, an exhaust port is provided on the top of the fume hood. The exhaust gas, under the negative pressure of the system, enters the fume hood directly after exchanging heat with the newly introduced material from the inductive self-heating melting furnace. This ensures that the temperature inside the water-cooled movable sealing cover is not high, the heat-resistant material of the water-cooled movable sealing cover has a long service life, and the material is prevented from being carried away by the flue gas.

[0011] In a preferred embodiment of the present invention, an infrared thermometer and a laser level gauge are provided on the top of the fume hood. The infrared thermometer precisely controls the material temperature in the inductive self-heating melting furnace by interlocking with the power supply heating, and the laser level gauge precisely controls the feeding amount by means of a material level alarm.

[0012] In a preferred embodiment of the present invention, a high-temperature resistant sealing ring is welded to the bottom of the steel shell of the fume hood, and a high-temperature resistant insulation cotton ring is bonded to the high-temperature resistant sealing ring using inorganic high-temperature adhesive. When the water-cooled movable sealing cover is lowered to its lowest position, the fume hood seals the water-cooled movable sealing cover with the fume hood through the high-temperature resistant sealing ring and the high-temperature resistant insulation cotton ring bonded to the high-temperature resistant sealing ring, so that the molten waste gas does not leak out.

[0013] In a preferred embodiment of the present invention, the discharge port of the feeding channel is aligned with the center of the furnace opening of the inductive self-heating melting furnace, and the diameter of the discharge port of the feeding channel is much smaller than the diameter of the furnace opening of the inductive self-heating melting furnace; the material falls directly into the middle of the inductive self-heating melting furnace.

[0014] In a preferred embodiment of the present invention, the lifting mechanism includes a plurality of lifting screw arms and a screw lifting mechanism symmetrically fixed to the top of the water-cooled movable sealing cover. The screw lifting mechanism is connected to the lifting screw arms and is used to lift the water-cooled movable sealing cover.

[0015] In a preferred embodiment of the present invention, the water-cooled movable sealing cover is composed of a water-cooling jacket and a high-temperature resistant insulation material, wherein the water-cooling jacket covers the surface of the high-temperature resistant insulation material; and a cooling water inlet pipe and a cooling water outlet pipe are provided on the water-cooling jacket.

[0016] In a preferred embodiment of the present invention, the cooling water inlet pipe is located at the upper part of the water-cooled jacket, so that the upper part of the water-cooled movable sealing cover has the lowest temperature, the lifting screw boom has a low temperature, and the lubricating oil of the screw thread has no heat loss.

[0017] In a preferred embodiment of the present invention, the cooling water inlet pipe and the cooling water outlet pipe are flexible hoses, which are not affected when the water-cooled movable sealing cover is raised or lowered.

[0018] In a preferred embodiment of the present invention, an external water tank is attached to the constant temperature water-cooled slag discharge machine, and a cold slag and cold water inlet is provided at a position near the molten slag and molten metal chute of the constant temperature water-cooled slag discharge machine; the cold slag and cold water inlet is connected to a cold water source, the external water tank is in communication with the interior of the constant temperature water-cooled slag discharge machine, and a cold slag hot water outlet is provided on the external water tank.

[0019] In a preferred embodiment of the present invention, the external water tank and the constant-temperature water-cooled slag discharge machine share an outer wall with an opening at the top, allowing water in the constant-temperature water-cooled slag discharge machine to overflow directly into the external water tank. The liquid level in the external water tank is always consistent with the liquid level in the constant-temperature water-cooled slag discharge machine. The constant-temperature water-cooled slag discharge machine drains water via a top overflow method, where the molten slag has already settled to the bottom of the machine, and the hot water drainage will not carry away the molten slag.

[0020] In a preferred embodiment of the present invention, the cold slag and cold water outlet is located in the middle of the external water tank, which avoids the phenomenon of the circulating water pump running dry.

[0021] Because of the above technical solution, the operation of pouring molten slag is simple, requires low technical level of workers, and does not require time to raise or lower the furnace body during pouring. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the process for treating incineration ash and slag using a typical hazardous waste incineration ash and slag inductive melting treatment system according to the present invention.

[0023] Figure 2 This is a schematic elevation view of a typical hazardous waste incineration ash and slag inductive melting treatment system according to the present invention.

[0024] Figure 3 This is a schematic plan view of a typical hazardous waste incineration ash and slag inductive melting treatment system according to the present invention.

[0025] Figure 4 This is a schematic diagram of the water-cooled movable sealing cover descending to its lowest position in a typical hazardous waste incineration ash and slag inductive melting treatment system of the present invention.

[0026] Figure 5 This is a schematic diagram of the water-cooled movable sealing cover raised to its highest position in a typical hazardous waste incineration ash and slag inductive melting treatment system of the present invention.

[0027] Figure 6 This is a schematic plan view of the steel ladle rotary flow channel in the transversely positioned position in the typical hazardous waste incineration ash and slag inductive melting treatment system of this invention.

[0028] Figure 7 A schematic diagram of the pouring of molten metal in a typical hazardous waste incineration ash and slag inductive melting treatment system of this invention. Detailed Implementation

[0029] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0030] See Figures 1 to 7 The typical hazardous waste incineration ash and slag induction melting treatment system shown in the figure includes: an induction self-heating melting furnace 100, a constant temperature water-cooled slag discharge machine 200, a fume hood 300, a water-cooled movable sealing cover 400, a steel ladle rotary flow channel 500, a weighing silo 600, a frequency conversion metering feeder 700, and a vibrating feeder 800.

[0031] The weighing silo 600 is used to store hazardous waste incineration ash and slag. The hazardous waste incineration ash and slag are continuously fed into the vibrating feeder 800 at a set amount by the frequency conversion metering feeder 700 at the bottom of the weighing silo 600. Under the push of the vibrating feeder 800, the material is continuously fed into the inductive self-heating melting furnace 100 through the feeding channel 340.

[0032] An inductive self-heating melting furnace 100 is mounted on an installation platform (not shown) via a tilting mechanism 110. A slag and molten metal chute 130 is provided on the top of the inductive self-heating melting furnace 100. A weighing device 140 is provided at the bottom of the installation platform (not shown).

[0033] The fume hood 300 is installed above the inductive self-heating melting furnace 100. The fume hood 300, along with the weighing hopper 600, the frequency conversion metering feeder 700, and the vibrating feeder 800, are installed on another platform (not shown in the figure).

[0034] The fume hood 300 adopts a fixed design, comprising, from the inside out, refractory castable 310, insulation material 320, and a steel shell 330. A feeding channel 340 is located at the center of the fume hood 300. The feeding channel 340 is relatively long, running through the entire fume hood 300. The feeding inlet of the feeding channel 340 extends from the top of the fume hood 300, and the discharge outlet of the feeding channel 340 is located at the bottom of the fume hood 300, aligned with the center of the furnace opening of the inductive self-heating melting furnace 100. The diameter of the discharge outlet of the feeding channel 340 is much smaller than the diameter of the furnace opening of the inductive self-heating melting furnace 100; the material falls directly into the center of the inductive self-heating melting furnace 100. The feeding channel 340 is made of high-temperature resistant and corrosion-resistant stainless steel 310S, ensuring a long service life.

[0035] A waste gas outlet 350 is provided at the top of the fume hood 300. This allows the waste gas, under system negative pressure, to directly enter the fume hood 300 after heat exchange with the newly introduced material from the inductive self-heating melting furnace 100 via the feed channel 340. This ensures that the temperature inside the water-cooled movable sealing cover 400 remains low, extending the service life of the heat-resistant material in the water-cooled movable sealing cover 400, and preventing material from being carried away by the flue gas. The waste gas exiting the exhaust outlet 350 is purified by the waste gas purification system 1000 and then discharged in compliance with emission standards.

[0036] An infrared thermometer 360 and a laser level gauge 370 are installed on the top of the fume hood 300. The infrared thermometer 360 precisely controls the material temperature inside the inductive self-heating melting furnace 100 through interlocking with the power supply heating, and the laser level gauge 370 precisely controls the feeding amount through the material level alarm.

[0037] The bottom diameter of the fume hood 300 is much smaller than that of the water-cooled movable sealing cover 400. A high-temperature resistant sealing ring 380 is welded to the bottom of the steel shell 330 of the fume hood 300. A high-temperature resistant insulation cotton ring 390 is bonded to the high-temperature resistant sealing ring 380 using inorganic high-temperature adhesive. When the water-cooled movable sealing cover 400 is lowered to its lowest position, the fume hood 300 seals the water-cooled movable sealing cover 400 and the fume hood 300 together through the high-temperature resistant sealing ring 380 and the high-temperature resistant insulation cotton ring 390 bonded to the high-temperature resistant sealing ring 380, so that the molten waste gas does not leak out.

[0038] A water-cooled movable sealing cover 400 is mounted above the inductive self-heating melting furnace 100 and slides onto the fume hood 300. The water-cooled movable sealing cover 400 is raised and lowered via a lifting mechanism; after being raised to its final position, the water-cooled movable sealing cover 400 is flush with the bottom of the fume hood 300 (see [reference]). Figure 4 This will not affect the flipping of the inductive self-heating melting furnace 100. When the water-cooled movable sealing cover 400 falls to its lowest position (see...), Figure 5The bottom of the water-cooled movable sealing cover 400 is in sealed contact with the flexible high-temperature resistant sealing gasket 121 on the platform 120 of the inductive self-heating melting furnace 100 and covers the inductive self-heating melting furnace 100, so that the molten waste gas does not leak out.

[0039] The water-cooled movable sealing cover 400 consists of a water-cooling jacket 410 and high-temperature resistant insulation material 420, with the water-cooling jacket 410 covering the surface of the high-temperature resistant insulation material 420. A cooling water inlet pipe 430 and a cooling water outlet pipe 440 are provided on the water-cooling jacket 410. The cooling water inlet pipe 430 and the cooling water outlet pipe 440 are flexible hoses, ensuring that the raising and lowering of the water-cooled movable sealing cover 400 is not affected. The cooling water inlet pipe 430 is located at the upper part of the water-cooling jacket 400, resulting in the lowest temperature at the upper part of the water-cooled movable sealing cover 400, low temperature of the lifting screw boom, and no heat loss of the lubricating oil in the screw thread.

[0040] The lifting mechanism includes four lifting screw arms 450 symmetrically fixed to the top of the water-cooled movable sealing cover 400 and a screw lifting mechanism (not shown in the figure). The screw lifting mechanism is connected to the lifting screw arms 450 to lift the water-cooled movable sealing cover 400. Since the weight of the water-cooled movable sealing cover 400 is much less than that of the inductive self-heating melting furnace 100, the lifting speed is fast, improving production efficiency and reducing energy loss. Since there is no high-temperature solution inside the water-cooled movable sealing cover 400, lifting the water-cooled movable sealing cover 400 is safer than lifting the inductive self-heating melting furnace 100.

[0041] The ladle rotary chute 500 is positioned beside the constant-temperature water-cooled slag discharger 200. The ladle rotary chute 500 is mounted on a ladle rotary chute support (not shown in the figure) via a rotating mechanism 510. When the ladle rotary chute 500 is in a position parallel to the slag and molten metal chute 130 (see...),... Figure 2 and Figure 3 The water-cooled movable sealing cover 400 is raised, and the inductive self-heating melting furnace 100 begins to tilt, pouring molten slag through the slag and molten metal chute 130 into the constant-temperature water-cooled slag discharge machine 200. Each pouring angle is less than 70°, ensuring that some molten slag remains at the bottom of the molten pool inside the inductive self-heating melting furnace 100, preventing cold material from touching the crucible during subsequent feeding and thus preventing an explosion. After the slag pouring is completed, the inductive self-heating melting furnace 100 returns to its original position, and the water-cooled movable sealing cover 400 is lowered into place using the lifting mechanism.

[0042] See Figure 6 and Figure 7When the ladle rotary flow channel 500 is in a position perpendicular to the slag and molten metal chute 130, the water-cooled movable sealing cover 400 is raised, and the inductive self-heating melting furnace 100 begins to rotate to 90°. Molten metal is poured into the ladle rotary flow channel 500 through the slag and molten metal chute 130, and all the molten metal in the inductive self-heating melting furnace 100 is discharged. The molten metal entering the ladle rotary flow channel 500 flows into the ladle 900 through the outlet of the ladle rotary flow channel 500.

[0043] The constant temperature water-cooled slag discharge machine 200 is configured next to the inductive self-heating melting furnace 100. An external water tank 210 is attached to the constant temperature water-cooled slag discharge machine 200, and a cold slag and cold water inlet 220 is set at the position of the constant temperature water-cooled slag discharge machine 200 near the slag and molten metal chute 130. The cold slag and cold water inlet 220 is connected to a cold water source, so that the water temperature at this position of the constant temperature water-cooled slag discharge machine 200 will never be too high.

[0044] The external water tank 210 and the constant temperature water-cooled slag discharge machine 200 share an outer wall with an opening 250 at the top, allowing the interiors of the external water tank 210 and the constant temperature water-cooled slag discharge machine 200 to communicate. This allows water in the constant temperature water-cooled slag discharge machine 200 to overflow directly into the external water tank 210, ensuring that the liquid level in the external water tank 210 is always the same as the liquid level in the constant temperature water-cooled slag discharge machine 200. The constant temperature water-cooled slag discharge machine 200 drains water via a top overflow method, where the molten slag has already settled to the bottom of the constant temperature water-cooled slag discharge machine 200, and the hot water drainage of the cold slag will not carry away the molten slag.

[0045] The external water tank 210 is equipped with a cold slag and hot water outlet 230 and a sewage outlet 240. The cold slag and cold water outlet 230 is located in the middle of the external water tank 210 to prevent the circulating water pump from running dry.

[0046] The constant temperature water-cooled slag discharge machine 200 sends the glass slag into the mobile slag box 1100.

Claims

1. A typical inductive melting treatment system for hazardous waste incineration ash and slag, characterized in that, include: An inductive self-heating melting furnace is installed on an installation platform via a tilting mechanism, and a slag and molten metal chute is provided on the top of the inductive self-heating melting furnace. A constant-temperature water-cooled slag discharge machine is configured next to the inductive self-heating melting furnace; A fume hood is installed above the inductive self-heating melting furnace. The fume hood, weighing hopper, frequency converter metering feeder, and vibrating feeder are installed on another platform. A feeding channel is provided inside the fume hood. The feeding channel is relatively long and runs through the entire fume hood. The feeding port of the feeding channel extends from the top of the fume hood, and the discharge port of the feeding channel is located at the bottom of the fume hood, aligned with the furnace opening of the inductive self-heating melting furnace. A water-cooled movable sealing cover; the water-cooled movable sealing cover is disposed above the inductive self-heating melting furnace and slidably sleeved on the smoke collection hood; the water-cooled movable sealing cover is raised and lowered by a lifting mechanism; when the water-cooled movable sealing cover falls to the lowest position, the bottom of the water-cooled movable sealing cover is in sealed contact with the installation platform of the inductive self-heating melting furnace and covers the inductive self-heating melting furnace. A ladle rotary flow channel is configured next to the constant-temperature water-cooled slag discharge machine. The ladle rotary flow channel is mounted on a ladle rotary flow channel support via a rotating mechanism. When the ladle rotary flow channel is parallel to the molten slag and molten metal chute, the water-cooled movable sealing cover is raised, and the inductive self-heating melting furnace begins to rotate and pour molten slag into the constant-temperature water-cooled slag discharge machine through the molten slag and molten metal chute. When the ladle rotary flow channel is perpendicular to the molten slag and molten metal chute, the water-cooled movable sealing cover is raised, and the inductive self-heating melting furnace begins to rotate and pour molten metal into the ladle rotary flow channel through the molten slag and molten metal chute. The molten metal entering the ladle rotary flow channel flows into the ladle through the outlet of the ladle rotary flow channel.

2. The typical hazardous waste incineration ash and slag inductive melting treatment system according to claim 1, characterized in that, An exhaust port is provided at the top of the fume hood. The exhaust gas, along with the negative pressure of the system, enters the fume hood directly after exchanging heat with the newly introduced material from the inductive self-heating melting furnace. This ensures that the temperature inside the water-cooled movable sealing cover is not high, the temperature-resistant material of the water-cooled movable sealing cover has a long service life, and it also prevents the material from being carried away with the flue gas.

3. The typical hazardous waste incineration ash and slag inductive melting treatment system according to claim 1, characterized in that, An infrared thermometer and a laser level gauge are installed on the top of the fume hood. The infrared thermometer precisely controls the material temperature inside the inductive self-heating melting furnace through a power supply heating interlock. The laser level gauge precisely controls the feeding amount through a material level alarm.

4. The typical hazardous waste incineration ash and slag inductive melting treatment system according to claim 1, characterized in that, A high-temperature resistant sealing ring is welded to the bottom of the steel shell of the fume hood. A high-temperature resistant insulation cotton ring is bonded to the high-temperature resistant sealing ring using inorganic high-temperature adhesive. When the water-cooled movable sealing cover is lowered to its lowest position, the fume hood seals the water-cooled movable sealing cover with the fume hood through the high-temperature resistant sealing ring and the high-temperature resistant insulation cotton ring bonded to the high-temperature resistant sealing ring, so that the molten waste gas does not leak out.

5. The typical hazardous waste incineration ash and slag inductive melting treatment system according to claim 1, characterized in that, The material inlet of the feeding channel is aligned with the center of the furnace opening of the inductive self-heating melting furnace, and the diameter of the material inlet of the feeding channel is much smaller than the diameter of the furnace opening of the inductive self-heating melting furnace; the material falls directly into the middle of the inductive self-heating melting furnace.

6. The typical hazardous waste incineration ash and slag inductive melting treatment system according to claim 1, characterized in that, The lifting mechanism includes several lifting screw booms and a screw lifting mechanism symmetrically fixed to the top of the water-cooled movable sealing cover. The screw lifting mechanism is connected to the lifting screw booms and is used to lift the water-cooled movable sealing cover.

7. The typical hazardous waste incineration ash and slag inductive melting treatment system according to claim 1, characterized in that, The water-cooled movable sealing cover is composed of a water-cooling jacket and a high-temperature resistant insulation material. The water-cooling jacket covers the surface of the high-temperature resistant insulation material. A cooling water inlet pipe and a cooling water outlet pipe are provided on the water-cooling jacket.

8. The typical hazardous waste incineration ash and slag inductive melting treatment system according to claim 7, characterized in that, The cooling water inlet pipe is located at the top of the water-cooled jacket, which minimizes the temperature at the top of the water-cooled movable sealing cover, keeps the lifting screw boom at a low temperature, and prevents heat loss of the lubricating oil in the screw thread.

9. The typical hazardous waste incineration ash and slag inductive melting treatment system according to claim 7, characterized in that, The cooling water inlet pipe and cooling water outlet pipe are flexible hoses, which do not affect the raising and lowering of the water-cooled movable sealing cover.

10. The typical hazardous waste incineration ash and slag inductive melting treatment system according to claim 1, characterized in that, An external water tank is attached to the constant temperature water-cooled slag discharge machine, and a cold slag and cold water inlet is provided at the position of the constant temperature water-cooled slag discharge machine near the molten slag and molten metal chute; the cold slag and cold water inlet is connected to a cold water source, the external water tank is connected to the interior of the constant temperature water-cooled slag discharge machine, and a cold slag hot water outlet is provided on the external water tank.

11. The typical hazardous waste incineration ash and slag inductive melting treatment system according to claim 10, characterized in that, The external water tank shares an outer wall with the constant temperature water-cooled slag discharge machine, and has an opening at the top of the outer wall, allowing water in the constant temperature water-cooled slag discharge machine to overflow directly into the external water tank. The liquid level in the external water tank is always the same as the liquid level in the constant temperature water-cooled slag discharge machine.

12. The typical hazardous waste incineration ash and slag inductive melting treatment system according to claim 11, characterized in that, The cold slag hot water outlet is located in the middle of the external water tank, which avoids the phenomenon of the circulating water pump running dry.

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