A waste heat recovery device for silica white production

Abstract

The present invention relates to the technical field of silica production, and discloses a waste heat recovery device for silica production, which includes a base and a heat exchange box installed on the base; a heat exchange cavity is formed in the heat exchange box, and a water inlet pipe and a water outlet pipe communicated with the heat exchange cavity are installed on one side of the heat exchange box, and an air inlet pipe and an air outlet pipe extending into the heat exchange cavity are respectively installed at both ends of the heat exchange box; through the diversion mechanism and the transmission mechanism of the present invention, the bent and folded heat exchange pipes can be rotated, and at the same time, in cooperation with the circulation mechanism, the cold water in the heat exchange cavity can be evenly heated, and through the control mechanism and in cooperation with the air guiding mechanism, the high-temperature tail gas can stay in the air inlet pipe, the heat exchange pipe and the air outlet pipe for a certain period of time, so that the high-temperature tail gas can have sufficient contact time with the cold water in the heat exchange cavity through the heat exchange pipe, which is convenient for the cold water to effectively absorb the heat in the high-temperature tail gas, and the temperature of the discharged high-temperature tail gas can also be controlled.

Description

Technical Field

[0001] The present invention relates to the technical field of silica production, and specifically to a waste heat recovery device for silica production. Background Technique

[0002] Silica is a general term for white powdery X-ray amorphous silicic acid and silicate products, mainly referring to precipitated silica, fumed silica and ultrafine silica gel, and also including powdery synthetic aluminum silicate and calcium silicate, etc. Silica is an important reinforcing material in the rubber industry. Because of its white appearance color and similar reinforcing properties in rubber, it is called silica.

[0003] During the production process of silica, a large amount of high-temperature tail gas will be generated. If these high-temperature tail gases are directly discharged into the atmosphere, on the one hand, it will cause environmental pollution, and on the other hand, it will also cause waste of heat. Therefore, it is necessary to recover and utilize the waste heat of the high-temperature tail gas. Currently, when recovering and utilizing the waste heat of the high-temperature tail gas, it is often to introduce the high-temperature tail gas during silica production into the heat exchange tubes installed in the water tank, and the heat exchange tubes are in contact with the cold water in the water tank and heat the cold water. And in order to extend the time of the high-temperature tail gas in the heat exchange tubes, the heat exchange tubes are set in a spiral shape, so that the waste heat of the high-temperature tail gas can be absorbed and utilized, and the temperature of the high-temperature tail gas discharged into the atmosphere can also be reduced.

[0004] However, the above-mentioned waste heat recovery method still has deficiencies. Although setting the heat exchange tubes in a spiral shape can extend the contact time between the high-temperature tail gas and the cold water in the water tank, the high-temperature tail gas flows relatively fast in the heat exchange tubes, and its contact time with the cold water is still not long enough, resulting in the heat of the high-temperature tail gas not being effectively absorbed and discharged from the heat exchange tubes. In addition, since the heat exchange tubes are fixedly placed in the water tank and the water in the water tank has poor fluidity, the cold water close to the heat exchange tubes warms up faster, while the cold water far from the heat exchange tubes warms up slower. Only through the heat transfer between hot water and cold water cannot make the water temperature in the water tank uniform, and there is a problem of uneven heating. For this reason, those skilled in the art have proposed a waste heat recovery device for silica production to solve the problems raised in the above background. Summary of the Invention

[0005] The purpose of the present invention is to provide a waste heat recovery device for silica production to solve the problems raised in the above background technique.

[0006] To achieve the above purpose, the present invention provides the following technical solutions:

[0007] A waste heat recovery device for silica white production, comprising a base and a heat exchange box installed on the base; a heat exchange cavity is formed in the heat exchange box for storing cold water required for heat exchange, and a water inlet pipe and a water outlet pipe communicating with the heat exchange cavity are installed on one side of the heat exchange box. An air inlet pipe and an air outlet pipe extending into the heat exchange cavity are respectively installed at both ends of the heat exchange box. The air inlet pipe is arranged at the bottom of the heat exchange box, and the air outlet pipe is arranged at the top of the heat exchange box. A heat exchange component is arranged between the air inlet pipe and the air outlet pipe. Both ends of the heat exchange component are installed with rotating connection blocks, and the two rotating connection blocks are respectively rotationally connected with the air inlet pipe and the air outlet pipe. A number of annularly distributed air distribution ports are formed on the rotating connection blocks. A plurality of annularly distributed heat exchange pipes communicating with the air distribution ports are arranged between the two rotating connection blocks, and the heat exchange pipes are in a bent and folded shape for increasing the contact area between the heat exchange pipes and the cold water. Connecting rods are installed on both sides of the top of the heat exchange cavity, and the connecting rods are fixedly connected with a transmission box rotationally connected with the rotating connection block. A plurality of annularly distributed support rods are installed on the outer wall of the transmission box, and the support rods are fixedly connected with a water collecting ring. Fixed rods are also installed on both sides of the top of the heat exchange cavity, and the fixed rods are connected with a control board connected to the air outlet pipe. It further includes:

[0008] A circulation mechanism, which is connected with the water collecting ring and is used to make the cold water in the heat exchange cavity circulate;

[0009] A diversion mechanism, which is arranged on the transmission box and connected with the water collecting ring, and is used to discharge the water flowing out of the circulation mechanism from the top of the heat exchange cavity;

[0010] A transmission mechanism, which is arranged in the transmission box and is used to drive the rotating connection block to rotate, that is, to drive the heat exchange component to rotate in the heat exchange cavity;

[0011] An air guiding mechanism, which is arranged on one side of the heat exchange box and connected with the air inlet pipe and the air outlet pipe, and is used to control the flow of high-temperature tail gas;

[0012] A control mechanism, which is arranged in the control board and is used to control the use of the air guiding mechanism.

[0013] As a preferred technical solution of the present invention, the diversion mechanism includes a rotating pipe rotatably arranged on the transmission box. The number of rotating pipes is set to be multiple and is arranged at annular intervals. The top end of the rotating pipe is rotationally connected with the water collecting ring, the bottom end of the rotating pipe is installed with a Z-shaped drain pipe, and a sleeve sleeved with the rotating pipe is installed at the bottom of the transmission box.

[0014] As a preferred technical solution of the present invention, the circulation mechanism includes a water suction pipe, a circulation pump and a water delivery pipe. The circulation pump is fixed on the inner wall of the heat exchange cavity and is connected with the water suction pipe and the water delivery pipe. The water suction pipe faces the bottom of the heat exchange cavity, and the water delivery pipe is connected with the water collecting ring.

[0015] As a preferred technical solution of the present invention, the heights of the plurality of Z-shaped drain pipes are arranged with a dislocation.

[0016] As a preferred technical solution of the present invention, the transmission mechanism includes a transmission cavity opened in the transmission box, a driving gear located in the transmission cavity is installed on the rotating pipe, and a driven gear meshing with the driving gear is installed on the rotating connection block.

[0017] As a preferred technical solution of the present invention, the air guiding mechanism includes a mounting bracket installed on the heat exchange box and located between the air inlet pipe and the air outlet pipe. A rotating shaft penetrating into the air inlet pipe and the air outlet pipe is rotatably arranged on the mounting bracket. Two baffles are installed on the rotating shaft. The two baffles are respectively located in the air inlet pipe and the air outlet pipe, and the baffles are circular, and the sizes are the same as the inner wall sizes of the air inlet pipe and the air outlet pipe. A driving member connected to the rotating shaft is installed on the mounting bracket.

[0018] As a preferred technical solution of the present invention, the control mechanism includes a fixed seat installed in the air outlet pipe, a thermistor is installed on the fixed seat, a sliding cavity is opened on the control board, an electromagnet is arranged at one end of the sliding cavity, an elastic component is arranged at the other end, and the elastic component is connected to a permanent magnet slidably connected to the sliding cavity. A first pressure sensor is arranged at one end of the electromagnet close to the permanent magnet, and a second pressure sensor is installed at one end of the sliding cavity far from the electromagnet.

[0019] As a preferred technical solution of the present invention, the elastic component includes a telescopic rod and an elastic member. Two telescopic rods and elastic members connected to the permanent magnet are installed at one end of the sliding cavity far from the electromagnet.

[0020] As a preferred technical solution of the present invention, a controller is installed on the heat exchange box.

[0021] The present invention has the following advantages: When the present invention is in use, first fill the heat exchange cavity of the heat exchange box with cold water. Then, under the action of the air guiding mechanism, the high-temperature tail gas generated during the production of silica white is introduced into the intake pipe. The high-temperature tail gas flows through the intake pipe, the heat exchange pipe, and the exhaust pipe in sequence. When the control mechanism monitors that the temperature in the exhaust pipe is higher than the set emission temperature, the air guiding mechanism closes the intake pipe and no longer allows the high-temperature tail gas to enter. At the same time, the exhaust pipe cannot discharge the high-temperature tail gas either. At this time, the high-temperature tail gas in the heat exchange pipe can heat the cold water in the heat exchange cavity, causing the cold water to start absorbing the heat of the high-temperature tail gas. In addition, when the high-temperature tail gas in the heat exchange pipe heats the cold water around the heat exchange pipe, the circulating mechanism makes the water in the heat exchange cavity flow cyclically from top to bottom, thereby improving the fluidity of the water and the fluidity between the hot water and the cold water, facilitating the transfer of heat. And when the guiding mechanism discharges the water in the circulating mechanism from the top of the heat exchange cavity, it will also drive the transmission mechanism. The transmission mechanism will drive the rotating connecting block to rotate, and the rotating connecting block drives the rotation, so that the bent and folded heat exchange pipe connected to the rotating connecting block can rotate in the heat exchange cavity, enabling the heat exchange pipe to fully contact the water circulating in the heat exchange cavity, thereby uniformly heating the cold water in the heat exchange cavity. When the control mechanism monitors that the temperature in the exhaust pipe reaches the set emission temperature, at this time the air guiding mechanism will open, and the high-temperature tail gas will continue to enter the intake pipe and discharge the low-temperature tail gas originally in the intake pipe, the heat exchange pipe, and the exhaust pipe, making the high-temperature tail gas refill the intake pipe, the heat exchange pipe, and the exhaust pipe. Through the control mechanism and in cooperation with the air guiding mechanism, the high-temperature tail gas can stay in the intake pipe, the heat exchange pipe, and the exhaust pipe for a certain period of time, enabling the high-temperature tail gas to have sufficient contact time with the cold water in the heat exchange cavity through the heat exchange pipe, facilitating the cold water to effectively absorb the heat in the high-temperature tail gas, and also being able to control the emission temperature of the high-temperature tail gas, with better use effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic structural diagram of a waste heat recovery device for silica white production.

[0023] Figure 2 It is a schematic structural diagram of the back of a waste heat recovery device for silica white production.

[0024] Figure 3 It is a schematic structural diagram of the interior of the heat exchange box of a waste heat recovery device for silica white production.

[0025] Figure 4 It is a schematic structural diagram of the heat exchange component of a waste heat recovery device for silica white production.

[0026] Figure 5 It is a schematic structural diagram of the rotating connecting block of a waste heat recovery device for silica white production.

[0027] Figure 6It is a structural schematic diagram of a circulation mechanism and a diversion mechanism in a waste heat recovery device for white carbon black production.

[0028] Figure 7 It is a bottom view of a transmission box in a waste heat recovery device for white carbon black production.

[0029] Figure 8 It is a cross-sectional view inside a transmission box in a waste heat recovery device for white carbon black production.

[0030] Figure 9 It is a structural schematic diagram of the inside of an air outlet pipe in a waste heat recovery device for white carbon black production.

[0031] Figure 10 It is a structural schematic diagram of the inside of a control board in a waste heat recovery device for white carbon black production.

[0032] Figure 11 It is a structural schematic diagram of a gas guiding mechanism in a waste heat recovery device for white carbon black production.

[0033] In the figure: 1, base; 2, heat exchange box; 3, heat exchange cavity; 4, intake pipe; 5, outlet pipe; 6, heat exchange assembly; 601, rotating connection block; 602, intermediate rod; 603, gas distribution port; 604, heat exchange tube; 7, connecting rod; 8, transmission box; 9, support rod; 10, water collection ring; 11, circulation mechanism; 1101, water suction pipe; 1102, circulation pump; 1103, water delivery pipe; 12, diversion mechanism; 1201, rotating pipe; 1202, sleeve; 1203, Z-shaped drain pipe; 13, transmission mechanism; 1301, transmission cavity; 1302, driven gear; 1303, driving gear; 14, gas guiding mechanism; 1401, mounting bracket; 1402, rotating shaft; 1403, baffle; 1404, driving member; 15, fixed rod; 16, control board; 17, control mechanism; 1701, fixed seat; 1702, thermistor; 1703, sliding cavity; 1704, electromagnet; 1705, permanent magnet; 1706, first pressure sensor; 1707, second pressure sensor; 18, elastic component; 1801, telescopic rod; 1802, elastic member; 19, water inlet pipe; 20, water outlet pipe; 21, controller. Specific embodiments

[0034] The technical solutions of the present invention will be further described in detail below in conjunction with specific embodiments. Embodiment 1

[0035] Please refer to Figures 1-11, A waste heat recovery device for white carbon black production, comprising a base 1 and a heat exchange box 2 installed on the base 1; a heat exchange cavity 3 is provided in the heat exchange box 2 for storing cold water required for heat exchange, and a water inlet pipe 19 and a water outlet pipe 20 communicating with the heat exchange cavity 3 are installed on one side of the heat exchange box 2 for injecting cold water into the heat exchange cavity 3 or discharging hot water from the heat exchange cavity 3. An air inlet pipe 4 and an air outlet pipe 5 extending into the heat exchange cavity 3 are respectively installed at both ends of the heat exchange box 2. The air inlet pipe 4 is arranged at the bottom of the heat exchange box 2, and the air outlet pipe 5 is arranged at the top of the heat exchange box 2. High-temperature tail gas is introduced from the air inlet pipe 4. Since the density of the high-temperature tail gas is lower than that of air, the high-temperature tail gas can flow along the heat exchange pipe 604 towards the air outlet pipe 5, so that the high-temperature tail gas can fill the air inlet pipe 4, the heat exchange pipe 604 and the air outlet pipe 5. A heat exchange component 6 is arranged between the air inlet pipe 4 and the air outlet pipe 5. The heat exchange component 6 includes an intermediate rod 602, and rotating connection blocks 601 are installed at both ends of the intermediate rod 602. The two rotating connection blocks 601 are respectively rotatably connected with the air inlet pipe 4 and the air outlet pipe 5, and a number of annularly distributed air distribution ports 603 are opened on the rotating connection blocks 601. A plurality of annularly distributed heat exchange pipes 604 communicating with the air distribution ports 603 are arranged between the two rotating connection blocks 601, and the heat exchange pipes 604 are in a bent and folded shape for increasing the contact area between the heat exchange pipes 604 and cold water. Connecting rods 7 are installed on both sides of the top of the heat exchange cavity 3, and the connecting rods 7 are fixedly connected with a transmission box 8 rotatably connected with the rotating connection blocks 601. A plurality of annularly distributed support rods 9 are installed on the outer wall of the transmission box 8, and the support rods 9 are fixedly connected with a water collection ring 10. Fixed rods 15 are also installed on both sides of the top of the heat exchange cavity 3, and the fixed rods 15 are connected with a control board 16 connected to the air outlet pipe 5. A controller 21 is installed on the heat exchange box 2 for controlling relevant electrical equipment in the device. It also includes:

[0036] A circulation mechanism 11, which is connected to the water collection ring 10 and is used to make the cold water in the heat exchange cavity 3 circulate;

[0037] A diversion mechanism 12, which is arranged on the transmission box 8 and is connected to the water collection ring 10 and is used to discharge the water flowing out of the circulation mechanism 11 from the top of the heat exchange cavity 3;

[0038] A transmission mechanism 13, which is arranged in the transmission box 8 and is used to drive the rotating connection blocks 601 to rotate, that is, to drive the heat exchange component 6 to rotate in the heat exchange cavity 3;

[0039] An air guiding mechanism 14, which is arranged on one side of the heat exchange box 2 and is connected to the air inlet pipe 4 and the air outlet pipe 5 and is used to control the flow of high-temperature tail gas;

[0040] A control mechanism 17, which is arranged in the control board 16 and is used to control the use of the air guiding mechanism 14.

[0041] When the present invention is in use, first fill the heat exchange cavity 3 of the heat exchange box 2 with cold water. Then, under the action of the air guiding mechanism 14, the high-temperature tail gas generated during the production of silica white is introduced into the intake pipe 4. The high-temperature tail gas flows through the intake pipe 4, the heat exchange pipe 604, and the outlet pipe 5 in sequence. When the control mechanism 17 monitors that the temperature in the outlet pipe 5 is higher than the set discharge temperature, the air guiding mechanism 14 closes, and no more high-temperature tail gas enters the intake pipe 4. At the same time, the high-temperature tail gas cannot be discharged from the outlet pipe 5. At this time, the high-temperature tail gas in the heat exchange pipe 604 can heat the cold water in the heat exchange cavity 3, causing the cold water to start absorbing the heat of the high-temperature tail gas. In addition, when the high-temperature tail gas in the heat exchange pipe 604 heats the cold water around the heat exchange pipe 604, the circulating mechanism 11 makes the water in the heat exchange cavity 3 flow circularly from top to bottom, thereby improving the fluidity of the water and the fluidity between the hot water and the cold water, facilitating heat transfer. And when the diversion mechanism 12 discharges the water flowing out of the circulating mechanism 11 from the top of the heat exchange cavity 3, it will also drive the transmission mechanism 13. The transmission mechanism 13 will drive the rotation connection block 601 to rotate, and the rotation connection block 601 drives the middle rod 602 to rotate, so that the bent and folded heat exchange pipe 604 connected to the rotation connection block 601 can rotate in the heat exchange cavity 3, enabling the heat exchange pipe 604 to fully contact the water circulating in the heat exchange cavity 3, thereby uniformly heating the cold water in the heat exchange cavity 3. When the control mechanism 17 monitors that the temperature in the outlet pipe 5 reaches the set discharge temperature, at this time the air guiding mechanism 14 will open, and the high-temperature tail gas will continue to enter the intake pipe 4 and discharge the low-temperature tail gas originally in the intake pipe 4, the heat exchange pipe 604, and the outlet pipe 5, so that the high-temperature tail gas fills the intake pipe 4, the heat exchange pipe 604, and the outlet pipe 5 again. By means of the control mechanism 17 and in cooperation with the air guiding mechanism 14, the high-temperature tail gas can stay in the intake pipe 4, the heat exchange pipe 604, and the outlet pipe 5 for a certain period of time, enabling the high-temperature tail gas to have sufficient contact time with the cold water in the heat exchange cavity 3 through the heat exchange pipe 604, facilitating the cold water to effectively absorb the heat in the high-temperature tail gas, and also being able to control the discharge temperature of the high-temperature tail gas, with better use effects. Moreover, the waste heat recovery devices of the present application can be set to multiple. Thus, when one waste heat recovery device recovers the waste heat of the injected high-temperature tail gas, the high-temperature tail gas can also be introduced into other waste heat recovery devices for waste heat recovery, avoiding heat loss caused by the high-temperature tail gas staying outside the device.

[0042] It should be noted that a temperature sensor is also provided in the heat exchange cavity 3 to monitor the temperature of the water in the heat exchange cavity 3. Thus, when the water is heated to the set temperature, the valve on the outlet pipe 20 is opened to discharge the warm water. Then, the valve on the outlet pipe 20 is closed, and the valve on the intake pipe 19 is opened. After injecting cold water into the heat exchange cavity 3, the heat absorption of the high-temperature tail gas in the heat exchange pipe 604 can be continued.

[0043] In a case of this embodiment, the circulation mechanism 11 includes a water suction pipe 1101, a circulation pump 1102, and a water delivery pipe 1103. The circulation pump 1102 is fixed to the inner wall of the heat exchange chamber 3 and is connected to the water suction pipe 1101 and the water delivery pipe 1103. The water suction pipe 1101 faces the bottom of the heat exchange chamber 3, and the water delivery pipe 1103 is connected to the water collection ring 10.

[0044] During use, the circulation pump 1102 is started through the controller 21, so that the water suction pipe 1101 can suck the water at the bottom of the heat exchange chamber 3 and deliver it into the water collection ring 10 through the water delivery pipe 1103. The water in the water collection ring 10 is then discharged from the top of the heat exchange chamber 3 through the diversion mechanism 12, so that the water in the heat exchange chamber 3 circulates from top to bottom, thereby improving the fluidity of the water and the fluidity between hot water and cold water, and facilitating heat transfer.

[0045] In a case of this embodiment, the diversion mechanism 12 includes a rotating pipe 1201 rotatably arranged on the transmission box 8. The number of the rotating pipes 1201 is set to be multiple and is arranged at annular intervals. The top end of the rotating pipe 1201 is rotatably connected to the water collection ring 10, and a Z-shaped drain pipe 1203 is installed at the bottom end of the rotating pipe 1201. A sleeve 1202 sleeved with the rotating pipe 1201 is installed at the bottom of the transmission box 8. The transmission mechanism 13 includes a transmission cavity 1301 opened in the transmission box 8. A driving gear 1303 located in the transmission cavity 1301 is installed on the rotating pipe 1201, and a driven gear 1302 meshing with the driving gear 1303 is installed on the rotating connection block 601.

[0046] The water in the water collection ring 10 is delivered to the Z-shaped drain pipe 1203 through the rotating pipe 1201 and discharged from the outlets at both ends of the Z-shaped drain pipe 1203. Since the Z-shaped drain pipe 1203 is Z-shaped, when the water is discharged from the outlets at both ends of the Z-shaped drain pipe 1203, a reverse impact force will be applied to the Z-shaped drain pipe 1203, causing the Z-shaped drain pipe 1203 to rotate, that is, causing the rotating pipe 1201 to rotate. When the rotating pipe 1201 rotates, it will also drive the driving gear 1303 to rotate. The driving gear 1303 will drive the driven gear 1302 to rotate, thereby driving the rotating connection block 601 to rotate. The rotating connection block 601 drives the heat exchange pipe 604 to rotate, so that the heat exchange pipe 604 can fully contact the water circulating in the heat exchange chamber 3, thereby uniformly heating the cold water in the heat exchange chamber 3.

[0047] It should be noted that the heights of the multiple Z-shaped drain pipes 1203 are arranged in a staggered manner, and since the heights of the multiple Z-shaped drain pipes 1203 are different, the water flow ejected from the Z-shaped drain pipes 1203 will not affect the rotation of the other Z-shaped drain pipes 1203. Embodiment Two

[0048] Please refer to Figures 1-11 , other contents of this embodiment are the same as those of Embodiment 1, the difference is that: the air guiding mechanism 14 includes a mounting frame 1401 installed on the heat exchange box 2 and located between the intake pipe 4 and the exhaust pipe 5, a rotating shaft 1402 penetrating into the intake pipe 4 and the exhaust pipe 5 is rotatably arranged on the mounting frame 1401, two baffle plates 1403 are installed on the rotating shaft 1402, the two baffle plates 1403 are respectively located in the intake pipe 4 and the exhaust pipe 5, and a driving member 1404 connected to the rotating shaft 1402 is installed on the mounting frame 1401. Preferably, the driving member 1404 is set as a servo motor.

[0049] It should be noted that the baffle plate 1403 is circular, and its size is the same as the inner wall sizes of the intake pipe 4 and the exhaust pipe 5.

[0050] During use, the driving member 1404 drives the rotating shaft 1402 to rotate, and the rotating shaft 1402 will rotate 90 degrees, so that the baffle plate 1403 switches between the vertical state and the horizontal state, that is, the intake pipe 4 and the exhaust pipe 5 switch between the blocked state and the flowing state.

[0051] In one case of this embodiment, the control mechanism 17 includes a fixed seat 1701 installed in the exhaust pipe 5, a thermistor 1702 is installed on the fixed seat 1701, a sliding cavity 1703 is formed on the control board 16, an electromagnet 1704 is arranged at one end of the sliding cavity 1703, an elastic component 18 is arranged at the other end, and the elastic component 18 is connected with a permanent magnet 1705 slidably connected to the sliding cavity 1703. A first pressure sensor 1706 is arranged at one end of the electromagnet 1704 close to the permanent magnet 1705, and a second pressure sensor 1707 is installed at the end of the sliding cavity 1703 far from the electromagnet 1704.

[0052] It should be noted that the thermistor 1702, the electromagnet 1704 and the external power supply are electrically connected, and the thermistor 1702 is a negative temperature coefficient thermistor. When the electromagnet 1704 is energized to generate magnetism, the magnetic poles of its close end to the permanent magnet 1705 are opposite, so as to generate a magnetic suction force on the permanent magnet 1705.

[0053] In the initial state, the baffle 1403 in the intake pipe 4 and the exhaust pipe 5 is in the open state, that is, the baffle 1403 is in the horizontal state. The high-temperature tail gas generated during the production of silica white is introduced into the intake pipe 4. The high-temperature tail gas flows through the intake pipe 4, the heat exchange pipe 604, and the exhaust pipe 5 in sequence, and the temperature in the exhaust pipe 5 is monitored by the thermistor 1702. When the resistance value of the thermistor 1702 becomes smaller, that is, when the high-temperature tail gas flows to the exhaust pipe 5, it indicates that the high-temperature tail gas has filled the intake pipe 4, the heat exchange pipe 604, and the exhaust pipe 5. At this time, the temperature of the high-temperature tail gas in the exhaust pipe 5 is high, resulting in a decrease in the resistance value of the thermistor 1702, increasing the current in the circuit where the electromagnet 1704 is located, enhancing the magnetism of the permanent magnet 1705, so that the permanent magnet 1705 connected to the elastic component 18 is adsorbed on the electromagnet 1704, and the first pressure sensor 1706 will receive a signal. The controller 21 will start the driving member 1404, causing the rotating shaft 1402 to rotate 90 degrees, that is, the baffle 1403 rotates from the horizontal state to the vertical state, so that the baffle 1403 seals the intake pipe 4 and the exhaust pipe 5. The high-temperature tail gas no longer enters the intake pipe 4, and at the same time, the exhaust pipe 5 cannot discharge the high-temperature tail gas. When the temperature of the high-temperature tail gas in the intake pipe 4 gradually decreases due to heat exchange, the resistance value of the thermistor 1702 will gradually increase, so that the current in the circuit of the electromagnet 1704 gradually decreases, and the magnetism of the electromagnet 1704 gradually weakens. During this process, the permanent magnet 1705 will separate from the permanent magnet 1705 under the action of the elastic component 18 and gradually approach the second pressure sensor 1707. When the permanent magnet 1705 contacts the second pressure sensor 1707, it indicates that the temperature of the high-temperature tail gas in the exhaust pipe 5 has dropped to the temperature that can be discharged. At this time, the driving member 1404 will drive the rotating shaft 1402 to rotate 90 degrees in the reverse direction, causing the baffle 1403 to rotate 90 degrees in the reverse direction, and the baffle 1403 rotates from the vertical state to the horizontal state, and no longer seals the intake pipe 4 and the exhaust pipe 5. The high-temperature tail gas will continue to enter the intake pipe 4 and discharge the low-temperature tail gas originally in the intake pipe 4, the heat exchange pipe 604, and the exhaust pipe 5, so that the high-temperature tail gas fills the intake pipe 4, the heat exchange pipe 604, and the exhaust pipe 5 again. At this time, the control mechanism 17 will control the air guiding mechanism 14 to seal the intake pipe 4 and the exhaust pipe 5. By means of the control mechanism 17 and in cooperation with the air guiding mechanism 14, the high-temperature tail gas can stay in the intake pipe 4, the heat exchange pipe 604, and the exhaust pipe 5 for a certain period of time, so that the high-temperature tail gas can have sufficient contact time with the cold water in the heat exchange cavity 3 through the heat exchange pipe 604, facilitating the cold water to effectively absorb the heat in the high-temperature tail gas, and the temperature of the discharged high-temperature tail gas can also be controlled, with better use effects.

[0054] In a case of this embodiment, the elastic component 18 includes a telescopic rod 1801 and an elastic member 1802. Preferably, the elastic member 1802 is set as a spring. Two telescopic rods 1801 and elastic members 1802 connected to the permanent magnet 1705 are installed at one end of the sliding cavity 1703 away from the electromagnet 1704.

[0055] Under the action of the elastic member 1802, the permanent magnet 1705 is subjected to an elastic tensile force towards the side of the second pressure sensor 1707. Cooperating with the magnetic change of the electromagnet 1704, the permanent magnet 1705 can slide in the sliding cavity 1703.

[0056] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above-described exemplary embodiments, and without departing from the spirit or basic characteristics of the present invention, the present invention can be implemented in other specific forms. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present invention. Any reference signs in the claims should not be regarded as limiting the claims involved.

[0057] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A waste heat recovery device for silica white production, comprising a base and a heat exchange box installed on the base, characterized in that, A heat exchange chamber is provided inside the heat exchange box for storing cold water required for heat exchange. An air inlet pipe and an air outlet pipe extending into the heat exchange chamber are respectively installed at both ends of the heat exchange box. A heat exchange component is arranged between the air inlet pipe and the air outlet pipe. The heat exchange component includes an intermediate rod, and rotating connection blocks are installed at both ends of the intermediate rod. The two rotating connection blocks are respectively rotatably connected to the air inlet pipe and the air outlet pipe, and a number of annularly distributed air distribution ports are provided on the rotating connection blocks. A plurality of annularly distributed heat exchange pipes communicating with the air distribution ports are arranged between the two rotating connection blocks. The heat exchange pipes are bent and folded to increase the contact area between the heat exchange pipes and the cold water. Connecting rods are installed on both sides of the top of the heat exchange chamber, and the connecting rods are fixedly connected to a transmission box rotatably connected to the rotating connection blocks. A plurality of annularly distributed support rods are installed on the outer wall of the transmission box, and the support rods are fixedly connected to a water collecting ring. Fixed rods are also installed on both sides of the top of the heat exchange chamber, and the fixed rods are connected to a control board connected to the air outlet pipe. It further includes: A circulation mechanism connected to the water collecting ring for circulating the cold water in the heat exchange chamber; A diversion mechanism arranged on the transmission box and connected to the water collecting ring for discharging the water flowing out of the circulation mechanism from the top of the heat exchange chamber; A transmission mechanism arranged in the transmission box for driving the rotating connection blocks to rotate, that is, driving the heat exchange component to rotate in the heat exchange chamber; An air guiding mechanism arranged on one side of the heat exchange box and connected to the air inlet pipe and the air outlet pipe for controlling the flow of high-temperature tail gas; The diversion mechanism includes a rotating pipe rotatably arranged on the transmission box. The number of rotating pipes is set to be multiple and they are arranged at annular intervals. The top end of the rotating pipe is rotatably connected to the water collecting ring, the bottom end of the rotating pipe is provided with a Z-shaped drain pipe, and a sleeve sleeved with the rotating pipe is installed at the bottom of the transmission box; A control mechanism arranged in the control board for controlling the use of the air guiding mechanism; The control mechanism includes a fixed seat installed in the air outlet pipe, a thermistor is installed on the fixed seat. A sliding cavity is provided on the control board. One end of the sliding cavity is provided with an electromagnet, the other end is provided with an elastic component, and the elastic component is connected to a permanent magnet slidably connected to the sliding cavity. A first pressure sensor is arranged at one end of the electromagnet close to the permanent magnet, and a second pressure sensor is installed at one end of the sliding cavity away from the electromagnet.

2. The waste heat recovery device for white carbon black production according to claim 1, characterized in that, The air inlet pipe is arranged at the bottom of the heat exchange box, and the air outlet pipe is arranged at the top of the heat exchange box.

3. The waste heat recovery device for white carbon black production according to claim 2, wherein A water inlet pipe and a water outlet pipe communicating with the heat exchange chamber are installed on one side of the heat exchange box.

4. A waste heat recovery device for white carbon black production according to claim 1, characterized in that, The heights of the plurality of Z-shaped drain pipes are arranged in a staggered manner.

5. The waste heat recovery device for white carbon black production according to claim 1, wherein, The circulation mechanism includes a water suction pipe, a circulation pump and a water delivery pipe. The circulation pump is fixed to the inner wall of the heat exchange chamber and is connected to the water suction pipe and the water delivery pipe. The water suction pipe faces the bottom of the heat exchange chamber, and the water delivery pipe is connected to the water collecting ring.

6. The waste heat recovery device for white carbon black production according to claim 1, characterized in that, The transmission mechanism includes a transmission cavity opened in the transmission box. A driving gear located in the transmission cavity is installed on the rotating pipe, and a driven gear meshing with the driving gear is installed on the rotating connection block.

7. An afterheat recovery device for white carbon black production according to claim 1, characterized in that, The air guiding mechanism includes a mounting frame installed on the heat exchange box and located between the intake pipe and the exhaust pipe. A rotating shaft penetrating into the intake pipe and the exhaust pipe is rotatably arranged on the mounting frame. Two baffles are installed on the rotating shaft. The two baffles are respectively located in the intake pipe and the exhaust pipe, and the baffles are circular, with dimensions the same as the inner wall dimensions of the intake pipe and the exhaust pipe. A driving member connected to the rotating shaft is installed on the mounting frame.

8. The waste heat recovery device for silica white production according to claim 7, characterized in that, The elastic component includes a telescopic rod and an elastic member. Two telescopic rods and elastic members connected to the permanent magnet are installed at one end of the sliding cavity away from the electromagnet.

9. The waste heat recovery device for white carbon black production according to claim 1, characterized in that, A controller is installed on the heat exchange box.

Images