Suspension liquid jet shell tube type flue gas cooling device

Abstract

The invention relates to a suspension liquid jet shell tube type flue gas cooling device which comprises a medium preparation mechanism; the cooling mechanism communicates with the medium preparation mechanism through a first conveying pipe and a second conveying pipe; the waste heat recovery mechanism is communicated with the cooling mechanism through a waste heat recovery pipe, and the waste heat recovery mechanism is communicated with the medium preparation mechanism through a waste heat return pipe; and the medium preparation mechanism, the cooling mechanism and the waste heat recovery mechanism communicate with the controller. According to the suspension liquid jet shell tube type flue gas cooling device, through multi-aspect structure optimization and collaborative design, multiple defects of an existing product are effectively overcome, and the suspension liquid jet shell tube type flue gas cooling device has remarkable technical advantages and beneficial effects. In the aspect of cooling efficiency, a'dead zone 'in the tower is eliminated through the global coverage design of the nozzle array, flue gas is guided to flow in a baffling manner through cooperation with the snakelike baffling design of the heat exchanger, flue gas short circuit is avoided, a heat exchange path is prolonged by more than 30%, and meanwhile, the contact area between superfine fog drops of 5-8 microns and the flue gas is increased by 2.2 times compared with the prior art.

Description

Technical Field

[0001] This invention belongs to the interdisciplinary field of industrial flue gas treatment and energy recovery, and is applied to industrial scenarios that generate high-temperature flue gas in the range of 550℃-200℃. In particular, it is a suspension injection shell-and-tube flue gas cooling device. Background Technology

[0002] Existing products for rapid cooling of flue gas from 550℃ to 200℃ generally feature a vertical cylindrical tower as their core structure. The tower body lacks functional zoning and only meets the basic flow path of "flue gas in - cooling - flue gas out." Furthermore, the fixed shape of these existing products—a vertical straight cylinder with a simple conical bottom—directly causes a core problem due to the lack of functional zoning and airflow guidance design: the straight-cylinder tower lacks airflow guidance structures, easily leading to "wall-adhering flow" and a "central dead zone" after the high-temperature flue gas enters. Only the cooling medium near the tower wall can contact the flue gas, making it difficult to effectively cool the flue gas in the central area. This results in a significant temperature difference across the tower's cross-section, hindering rapid cooling. Therefore, existing products have a simplistic shape design and core structure, failing to optimize for the core requirements of "efficient heat exchange" in rapid flue gas cooling, resulting in uneven cooling. Summary of the Invention

[0003] To address the shortcomings of existing technologies, the purpose of this invention is to provide a suspension jet shell-and-tube flue gas cooling device capable of achieving rapid cooling.

[0004] To solve the above-mentioned technical problems, the present invention provides a suspension injection shell-and-tube flue gas cooling device, comprising: a medium preparation mechanism; a cooling mechanism, wherein the cooling mechanism is connected to the medium preparation mechanism via a first conveying pipe and a second conveying pipe; a waste heat recovery mechanism, wherein the waste heat recovery mechanism is connected to the cooling mechanism via a waste heat recovery pipe and to the medium preparation mechanism via a waste heat return pipe; and a controller, wherein the medium preparation mechanism, the cooling mechanism, and the waste heat recovery mechanism are respectively connected to the controller; wherein the cooling mechanism includes: a quench tower, wherein the quench tower has a hollow structure; a flue gas inlet is provided at the upper part of the quench tower, the flue gas inlet being connected to an external flue gas source; the quench... The lower part of the tower is connected to the waste heat recovery mechanism via the waste heat recovery pipe; a heat exchanger is installed inside the cavity of the quench tower; one end of the heat exchanger is connected to the medium preparation mechanism via the first conveying pipe, and the other end of the heat exchanger is connected to the external flue gas source via the flue gas inlet; the other end of the heat exchanger extends out of the quench tower and is connected to the waste heat recovery mechanism via the waste heat recovery pipe; a flue gas recovery port is provided on the heat exchanger, and the flue gas recovery port is located outside the quench tower; a temperature sensor and a flow sensor are installed inside the quench tower, and the temperature sensor and the flow sensor communicate with the controller respectively.

[0005] The heat exchanger includes: an inner tube, one end of which is connected to the medium preparation mechanism via the first conveying pipe, and the other end of which extends out of the quench tower and is connected to the waste heat recovery mechanism via the waste heat recovery pipe; an outer tube, which is sleeved outside the inner tube, forming a flue gas channel between the outer tube and the inner tube; one end of the outer tube is connected to the external flue gas source via the flue gas inlet, and the other end of the inner tube extends out of the quench tower and is connected to the waste heat recovery pipe; and heat exchange plates, which are disposed on the outer wall of the inner tube and located within the flue gas channel; wherein the flue gas recovery port is connected to the flue gas channel.

[0006] The heat exchanger is a serpentine pipe.

[0007] The medium preparation mechanism includes: a mixing tank with a filling port at its upper part; a stirring paddle connected to a motor at its upper part, with its working end extending into the cavity of the mixing tank, and the motor communicating with the controller; a disperser at its upper part, with its working end extending into the cavity of the mixing tank, and the disperser communicating with the controller; and a heating jacket fitted over the outside of the mixing tank, and the heating jacket communicating with the controller.

[0008] The medium preparation mechanism further includes a liquid storage tank; the liquid storage tank is connected to the stirring tank through a liquid storage pipe; wherein the liquid storage tank is connected to one end of the heat exchanger through the first delivery pipe; and the liquid storage tank is connected to the inner cavity of the quench tower through the second delivery pipe.

[0009] An anti-clogging system is provided at the connection between the second delivery pipe and the quench tower, and the anti-clogging system communicates with the controller.

[0010] A nozzle is provided on the inner wall of the quench tower, the nozzle is located at the connection between the second delivery pipe and the quench tower, and the nozzle communicates with the controller.

[0011] The waste heat recovery mechanism includes: a boiler, which has a hollow structure and an air outlet at the top; and a heat exchanger, which is installed inside the boiler, with its inlet connected to the waste heat recovery pipe and its outlet connected to the waste heat return pipe.

[0012] The inner wall of the quench tower is coated with an anti-corrosion coating.

[0013] A high-pressure plunger pump is installed in the first delivery pipe, and the high-pressure plunger pump communicates with the controller.

[0014] Compared with existing similar products, the suspended liquid jet shell-and-tube flue gas cooling device of this invention effectively solves multiple defects of existing products through multi-faceted structural optimization and synergistic design, possessing significant technical advantages and beneficial effects. Regarding cooling efficiency, the full-coverage design of the nozzle array eliminates "dead zones" within the tower. Combined with the serpentine baffle design of the heat exchanger 13, it guides the flue gas flow, avoiding short-circuiting and extending the heat exchange path by more than 30%. Simultaneously, the contact area between the 5μm to 8μm ultrafine droplets and the flue gas is increased by 2.2 times compared to existing technologies. The 0.0625wt% modified nano-copper particles added to the cooling medium utilize the phonon conduction effect, increasing the thermal conductivity by 14% to 22.5% compared to traditional media, significantly improving heat exchange efficiency and ensuring that the flue gas can be rapidly cooled within 1 second, meeting process requirements. In terms of equipment reliability, the high-pressure nitrogen backflushing anti-clogging system 19 significantly improves operational stability. In terms of corrosion resistance and durability, the polytetrafluoroethylene-alumina coating on the inner wall of the quench tower 11 and the Hastelloy components of the heat exchanger 13 form a double protection, which can effectively block the penetration of corrosive media and withstand Cl⁻ concentration ≤1000ppm. Combined with fluororubber seals, it significantly reduces the risk of leakage. Attached Figure Description

[0015] Other features, objects, and advantages of the present invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings.

[0016] Figure 1 This is a schematic diagram of the structure of the suspension injection shell-and-tube flue gas cooling device of the present invention. Figure 2 This is a schematic diagram of the heat exchanger structure of the suspension jet shell-and-tube flue gas cooling device of the present invention.

[0017] Explanation of reference numerals in the accompanying drawings of the suspension injection shell-and-tube flue gas cooling device of this invention: Detailed Implementation

[0018] To make the objectives, technical solutions, and beneficial effects of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0019] For ease of description, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified. In this application, unless otherwise explicitly stated and limited, the terms "installed," "connected," "linked," "fixed," etc., should be interpreted broadly. For example, they may refer to a fixed connection, a detachable connection, or an integral connection; a mechanical connection or an electrical connection; a direct connection or an indirect connection through an intermediate medium; or a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0020] Unless otherwise specified, the terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains, and the terms should be understood to have the meaning consistent with the meaning in the context of the relevant art, and should not be interpreted in an idealized or over-formalized manner, except as expressly defined in this invention.

[0021] like Figure 1 , Figure 2As shown, the suspension jet shell-and-tube flue gas cooling device of the present invention consists of three core parts: a medium preparation mechanism, a cooling mechanism, and a waste heat recovery mechanism. These mechanisms are interconnected and work collaboratively through a specific pipeline system. A dedicated workpiece fixing device is also provided to ensure the installation stability and operational reliability of the core components. The design comprehensively addresses multiple shortcomings of existing similar products in terms of cooling performance, equipment reliability, and energy utilization. The medium preparation mechanism, as the core for generating and storing the cooling medium (suspension), mainly includes a stirring tank 1, a stirring paddle 3, a motor 4, a disperser 5, a heating jacket 6, and a storage tank 9. The stirring tank 1 is a vertical hollow structure with a filling port 2 at the top for injecting raw materials such as pure water, alkaline solution, and modified nano-copper particles. The filling port 2 is equipped with a sealing cap to prevent raw material leakage and impurity entry. The connecting end of the stirring paddle 3 is installed on the upper part of the mixing tank 1 via the motor 4. The working end extends vertically into the cavity of the mixing tank 1. The stirring paddle 3 adopts a three-bladed spiral structure, and the surface of the blades is polished to reduce media adhesion. The motor 4 is a variable frequency speed control motor, which can adjust the speed according to the media mixing requirements to ensure thorough mixing of raw materials. The disperser 5 is also set on the upper part of the mixing tank 1, with its working end extending into the cavity of the mixing tank 1 and located above the stirring paddle 3. The disperser 5 uses ultrasonic dispersion technology to uniformly disperse modified nano-copper particles in the cooling medium, avoiding particle agglomeration that affects the heat conduction effect. The disperser 5 works in conjunction with the motor 4, first achieving preliminary mixing of raw materials through the stirring paddle 3, and then finely dispersing them through the disperser 5 to ensure the uniformity of the cooling medium. The heating jacket 6 is fitted on the outside of the mixing tank 1, with the inner wall of the heating jacket 6 adhering to the outer wall of the mixing tank 1 to ensure the stability of the physical properties of the cooling medium and improve heat exchange efficiency. The storage tank 9 is connected to the lower part of the mixing tank 1 through the storage pipe 7. The storage pipe 7 is equipped with a filter 8 to intercept impurities in the medium and prevent clogging of subsequent pipes and nozzles 26. The storage tank 9 can store enough cooling medium to meet the requirements of continuous operation. The storage tank 9 is equipped with a liquid level sensor to monitor the liquid level in real time. When the liquid level is lower than the set value, the replenishment pump between the mixing tank 1 and the storage tank 9 will be automatically turned on to replenish the medium.

[0022] The cooling mechanism, as the core working area for flue gas cooling and heat exchange, includes a quench tower 11, a heat exchanger 13, and an array of nozzles 26. The quench tower 11 is a hollow cylindrical structure, employing a carbon steel substrate combined with a protective design of a polytetrafluoroethylene-alumina coating. The coating is resistant to Cl⁻ concentrations ≤1000ppm, effectively resisting corrosion. A flue gas inlet 12 is located at the top of the quench tower 11, guiding high-temperature flue gas evenly into its interior. The flue gas inlet 12 is connected to an external flue gas source. The lower part of the quench tower 11 is connected to the waste heat recovery mechanism via a waste heat recovery pipe 15. The heat exchanger 13 is installed inside the cavity of the quench tower 11. It has a serpentine pipe structure, which can extend the heat exchange path of the flue gas. The heat exchanger 13 includes an inner tube 20, an outer tube 21 and heat exchange plates 22. An annular flue gas channel 23 is formed between the inner tube 20 and the outer tube 21. The heat exchange plates 22 are installed on the outer wall of the inner tube 20 and located inside the flue gas channel 23. The heat exchange plates 22 have an annular structure, which can increase the heat exchange area and improve the heat exchange efficiency. One end of the heat exchanger 13 is connected to the liquid storage tank 9 of the medium preparation mechanism through the first delivery pipe 10. The first delivery pipe 10 is equipped with a high-pressure plunger pump, which can deliver the cooling medium to the heat exchanger 13 under high pressure. The other end of the heat exchanger 13 extends out of the quench tower 11 and is connected to the waste heat recovery mechanism through the waste heat recovery pipe 15. The other end of the inner pipe 20 extends out of the quench tower 11 and is connected to the waste heat recovery pipe 15. One end of the outer pipe 21 is connected to the external flue gas source through the flue gas inlet 12, so that the high-temperature flue gas can enter the flue gas channel 23 and exchange heat with the cooling medium in the inner pipe 20. The heat exchanger 13 is equipped with a flue gas recovery port 14, which is located outside the quench tower 11 and connected to the flue gas channel 23. It is used to discharge the flue gas after heat exchange, perform sampling and detection, or directly recover the flue gas.

[0023] The nozzle array 26 is fixed on the inner wall of the quench tower 11. The nozzle array 26 consists of 8 Hastelloy fan-shaped nozzles 26. The number of nozzles 26 is designed according to the diameter of the quench tower 11 and is evenly distributed on the mounting base to form a full-area spray effect. Compared with the 10μm to 15μm droplets in the prior art, the contact area is increased by 2.2 times, which effectively improves the mixing effect of flue gas and cooling medium.

[0024] The storage tank 9 is also connected to the inner cavity of the quench tower 11 via the second delivery pipe 24. A medium is injected into the inner cavity of the quench tower 11 through the second delivery pipe 24, and the medium in the inner cavity further dissipates heat by interacting with the flue gas in the heat exchanger 13. Simultaneously, a high-pressure nitrogen backflushing anti-clogging system 19 is installed at the connection between the second delivery pipe 24 and the quench tower 11. The anti-clogging system 19 backflushes for 0.3 seconds every 30 minutes to remove impurities from the filter screen at the connection point.

[0025] The waste heat recovery mechanism includes a boiler 16 and a heat exchanger 17. The boiler 16 has a hollow structure, and the heat exchanger 17 is installed inside the boiler 16 and immersed in the water inside the boiler 16 to exchange heat with the water. The upper part of the boiler 16 is provided with a steam outlet 25 for discharging the generated steam. The inlet of the heat exchanger 17 is connected to the waste heat recovery pipe 15, and the outlet is connected to the waste heat return pipe 18. The waste heat return pipe 18 is connected to the liquid storage tank 9, forming a cooling medium recycling system.

[0026] The working process of the suspension jet shell-and-tube flue gas cooling device of the present invention is as follows: First, deionized water, modified nano-copper and polyethylene glycol are injected into the mixing tank 1 in proportion through the injection port 2 of the medium preparation mechanism. The motor 4 and the disperser 5 are started. The stirring paddle 3 rotates under the drive of the motor 4 to initially mix the raw materials. The disperser 5 disperses the modified nano-copper particles evenly in the medium through ultrasonic vibration to avoid particle agglomeration. At the same time, the heating jacket 6 heats the medium according to the set temperature to ensure the stability of the physical properties of the medium. The prepared cooling medium is transported to the storage tank 9 through the storage pipe 7. The liquid level sensor in the storage tank 9 monitors the medium status in real time. When the liquid level is lower than the set value, the replenishment pump is automatically turned on to replenish the medium.

[0027] High-temperature flue gas enters the flue gas passage 23 of the heat exchanger 13 through the flue gas inlet 12 at the top of the quench tower 11. Simultaneously, the controller starts the high-pressure plunger pump, which delivers the cooling medium in the storage tank 9 to the inner tube 20 of the heat exchanger 13 through the first delivery pipe 10. The cooling medium flows in the serpentine inner tube 20. At the same time, the medium is injected into the inner cavity of the quench tower 11 through the second delivery pipe 24. At this time, the cooling medium on both sides exchanges heat with the high-temperature flue gas in the flue gas passage 23. The heat exchange fins 22 increase the contact area between the inner tube 20 and the flue gas, improving the heat exchange efficiency. Meanwhile, the anti-clogging system 19 and the backflushing system of the nozzles 26 work periodically to prevent the second delivery pipe 24 from becoming blocked, thus extending the continuous operation time of the equipment. During the heat exchange process, the PLC controller receives signals from the temperature and flow sensors inside the quench tower 11 in real time, dynamically adjusts the output pressure of the high-pressure plunger pump, the opening of the electric regulating valve, and the backflushing cycle of the nozzle 26 to ensure that the cooling rate meets the process requirement of "quenching within 1 second". At the same time, it controls the moisture content of the outlet flue gas to avoid exceeding the standard and causing subsequent equipment failure.

[0028] After heat exchange, the flue gas is recovered directly from outside the quench tower 11 through the flue gas recovery port 14. The cooling medium is transported through the lower part of the quench tower 11 and the heat exchanger 13 to the heat exchanger 17 of the waste heat recovery mechanism via the waste heat recovery pipe 15. The cooling medium flows in the heat exchanger 17, transferring heat to the heat transfer medium. The heat transfer medium transfers heat to the water in the boiler 16 through the circulation system, generating steam which is discharged from the outlet 25. The cooled cooling medium flows back to the storage tank 9 through the waste heat return pipe 18, achieving recycling.

[0029] This invention addresses the shortcomings of similar products used for rapid cooling of flue gas from 550℃ to 200℃, which have numerous deficiencies in structural design and functional implementation, making it difficult to meet the core requirements of efficient heat exchange and stable operation for rapid flue gas cooling. Existing products are all based on a vertical cylindrical tower body as the core form. Some products adopt a combination structure of "cylindrical tower body + conical bottom" to adapt to the needs of slag discharge or liquid accumulation. There is no complex irregular shape design. The whole is straight and there is no functional division. The top only has a circular flue gas inlet and outlet or a simple nozzle installation platform. The platform is narrow and lacks protective design. If the bottom is a conical section, the cone angle design is fixed. The cone bottom is directly connected to a manual slag discharge valve or an open liquid accumulation tank, which can only meet the basic flow path of "flue gas in - cooling - flue gas out", and the function is not targeted enough.

[0030] In terms of core structural construction, the existing products' quench tower bodies have obvious defects: the main body material is mainly ordinary carbon steel, with stainless steel used only in small amounts in local high-temperature areas such as the flue gas inlet, and no corrosion-resistant high-temperature special alloy materials are used; the inner lining protection conventionally adopts a double-layer structure of "acid-resistant castable + aluminum silicate fiber felt", and although some products have sealant applied to the surface of the castable, none of them have a special coating for highly corrosive flue gas; the support structure uses steel support legs on the outside of the tower body, which are rigidly connected to the concrete foundation by bolts, lacking thermal expansion compensation design and buffer protection, resulting in poor operational stability. The design of the cooling medium injection system also fails to meet optimization standards. Existing nozzles are mostly direct-shot or simple fan-shaped structures without multi-stage atomization design, resulting in a small spray angle and large droplet size. The nozzles are mainly made of ordinary stainless steel and are arranged in small quantities along the circumference of the tower, failing to achieve full coverage within the tower. The pipeline system uses ordinary centrifugal pumps to deliver the cooling medium, with only a coarse filter screen installed before the pump. The equipped manual regulating valve cannot dynamically adjust the injection volume according to flue gas parameters, and the nozzles lack a dedicated anti-clogging structure, requiring regular manual cleaning. The cooling medium is mostly pure water or ordinary alkaline solution, without the addition of heat-conducting enhancement components, relying solely on the liquid's own heat absorption for cooling, thus limiting heat exchange efficiency.

[0031] Waste heat recovery functionality is poorly implemented in existing products, with only a few products equipped with it, and these are typically external, split-type structures, resulting in significant heat loss. The heat exchanger shell is made of ordinary stainless steel, and the tube bundles are carbon steel or ordinary stainless steel tubes arranged in a square pattern. The baffles are straight plates and few in number, easily leading to short circuits in the flue gas. The circulation system uses a mineral-based thermally conductive suspension, with simple pipe insulation, loose connections to the external boiler, and no closed-loop precise control, achieving only basic heat recovery. Regarding corrosion protection, existing products primarily rely on passive protection, lacking a systematic layout. The main body of the quench tower relies on the lining's castable refractory and fiber felt for corrosion protection, without a dedicated corrosion-resistant coating. The heat exchanger shell and tube bundles also lack additional corrosion protection. The suspension pipelines are mostly made of ordinary stainless steel, flange seals use asbestos gaskets or ordinary rubber gaskets, and bolts are made of conventional carbon steel or stainless steel. There is no targeted corrosion detection and repair structure; repairs are only carried out passively after significant corrosion and leakage occur.

[0032] The aforementioned structural defects have resulted in a single shape design and a simplified core structure for existing products. They have not been optimized to meet the core requirement of "high-efficiency heat exchange" for rapid flue gas cooling, ultimately leading to the critical problem of uneven cooling: the fixed shape of the rapid cooling tower, "vertical straight cylinder + simple conical bottom", lacks functional zoning and flow guidance design. After the high-temperature flue gas enters, it is easy to form "wall-adhering flow" and "central dead zone". Only the cooling medium near the tower wall can contact the flue gas, and the flue gas in the central area is difficult to be effectively cooled. The temperature difference in the cross section inside the tower is significant, and rapid cooling cannot be achieved.

[0033] In comparison, the suspended liquid injection shell-and-tube flue gas cooling device of the present invention comprehensively solves the multiple defects of existing products through the synergistic optimization design of the medium preparation mechanism, cooling mechanism, and waste heat recovery mechanism. In the medium preparation mechanism, the stirring tank 1, together with the three-bladed spiral stirring paddle 3, the variable frequency speed control motor 4, and the ultrasonic disperser 5, thoroughly mixes and disperses pure water, alkaline solution, and modified nano-copper particles to avoid particle agglomeration. The heating jacket 6 ensures the stability of the physical properties of the medium. The storage tank 9, through the storage pipe 7 and the filter 8, realizes the storage of the medium and the interception of impurities, which greatly improves the thermal conductivity of the cooling medium. In the cooling system, the quench tower 11 adopts a protective design with a carbon steel substrate and a polytetrafluoroethylene-alumina coating, which can withstand Cl⁻ concentrations ≤1000ppm, effectively resisting corrosion. The built-in heat exchanger 13 adopts a serpentine pipe structure, with the flue gas channel 23 formed by the inner pipe 20 and the outer pipe 21 combined with the annular heat exchange plate 22, extending the heat exchange path and increasing the contact area. An array of 8 Hastelloy fan-shaped nozzles 26 achieves full-area spray coverage, increasing the droplet contact area by 2.2 times compared to existing products. The second delivery pipe 24 is equipped with an anti-clogging system 19 that backflushes for 0.3 seconds every 30 minutes to prevent pipe blockage. The waste heat recovery system forms a closed-loop circulation with the boiler 16 through the waste heat recovery pipe 15 and the heat exchanger 17. After heat exchange, the cooling medium returns to the storage tank 9 via the waste heat return pipe 18 for reuse, significantly reducing heat loss. Meanwhile, the PLC controller dynamically adjusts the high-pressure plunger pump pressure, the opening of the electric regulating valve, and the 26-cycle backflushing of the nozzle based on temperature and flow sensor signals to ensure the rapid cooling process requirement within 1 second and precisely control the moisture content of the outlet flue gas. In summary, this invention achieves significant improvements in cooling efficiency, equipment reliability, and energy utilization, effectively addressing the core technical deficiencies of existing products.

[0034] The above description of the embodiments is provided to enable those skilled in the art to understand and use the present invention. It will be apparent to those skilled in the art that various modifications can be made to these embodiments, and the general principles described herein can be applied to other embodiments without inventive effort. Therefore, the present invention is not limited to the above embodiments, and any improvements and modifications made by those skilled in the art based on the disclosure of the present invention without departing from the scope of the invention should be within the protection scope of the present invention.

Claims

1. A suspension-injection shell-and-tube flue gas cooling device, characterized in that, include: Medium preparation mechanism; A cooling mechanism, which is connected to the medium preparation mechanism via a first delivery pipe and a second delivery pipe; The waste heat recovery mechanism is connected to the cooling mechanism via a waste heat recovery pipe and to the medium preparation mechanism via a waste heat return pipe. The controller is connected to the medium preparation mechanism, the cooling mechanism, and the waste heat recovery mechanism. in The cooling mechanism includes: A quench tower, wherein the quench tower has a hollow structure; a flue gas inlet is provided at the upper part of the quench tower, the flue gas inlet being connected to an external flue gas source; and the lower part of the quench tower is connected to the waste heat recovery mechanism through the waste heat recovery pipe. A heat exchanger is disposed within the cavity of the quench tower; one end of the heat exchanger is connected to the medium preparation mechanism via the first delivery pipe, and another end of the heat exchanger is connected to the external flue gas source via the flue gas inlet; the other end of the heat exchanger extends out of the quench tower and is connected to the waste heat recovery mechanism via the waste heat recovery pipe; a flue gas recovery port is provided on the heat exchanger, and the flue gas recovery port is located outside the quench tower; A temperature sensor and a flow sensor are installed inside the quench tower, and the temperature sensor and the flow sensor communicate with the controller respectively.

2. The suspension jet shell-and-tube flue gas cooling device according to claim 1, characterized in that, The heat exchanger includes: The inner tube has one end connected to the medium preparation mechanism via the first conveying pipe, and the other end extends out of the quench tower and is connected to the waste heat recovery mechanism via the waste heat recovery pipe. An outer tube is fitted over the inner tube, forming a flue gas passage between the outer tube and the inner tube; one end of the outer tube is connected to the external flue gas source through the flue gas inlet, and the other end of the inner tube extends out of the quench tower and is connected to the waste heat recovery tube; Heat exchange fins are disposed on the outer wall of the inner tube and are located within the flue gas passage; wherein The flue gas recovery port is connected to the flue gas channel.

3. The suspension jet shell-and-tube flue gas cooling device according to claim 1 or 2, characterized in that, The heat exchanger is a serpentine pipe.

4. The suspension injection shell-and-tube flue gas cooling device according to claim 1, characterized in that, The medium preparation mechanism includes: A mixing tank, wherein a material inlet is provided at the top of the mixing tank; A stirring paddle, the connecting end of which is located at the upper part of the mixing tank via a motor, the working end of which extends into the cavity of the mixing tank, and the motor communicating with the controller; A disperser is disposed at the top of the mixing tank, with its working end extending into the cavity of the mixing tank, and the disperser communicates with the controller. A heating jacket is fitted over the outside of the mixing tank, and the heating jacket communicates with the controller.

5. The suspension injection shell-and-tube flue gas cooling device according to claim 4, characterized in that, The medium preparation mechanism further includes a liquid storage tank; the liquid storage tank is connected to the stirring tank via a liquid storage pipe; wherein The liquid storage tank is connected to one end of the heat exchanger through the first delivery pipe; The storage tank is connected to the inner cavity of the quench tower via the second delivery pipe.

6. The suspension injection shell-and-tube flue gas cooling device according to claim 1 or 5, characterized in that, An anti-clogging system is provided at the connection between the second delivery pipe and the quench tower, and the anti-clogging system communicates with the controller.

7. The suspension injection shell-and-tube flue gas cooling device according to claim 6, characterized in that, A nozzle is provided on the inner wall of the quench tower, the nozzle is located at the connection between the second delivery pipe and the quench tower, and the nozzle communicates with the controller.

8. The suspension injection shell-and-tube flue gas cooling device according to claim 1, characterized in that, The waste heat recovery mechanism includes: A boiler, wherein the boiler has a hollow structure and an air outlet is provided at the top of the boiler; A heat exchanger is installed inside the boiler. The inlet of the heat exchanger is connected to the waste heat recovery pipe, and the outlet of the heat exchanger is connected to the waste heat return pipe.

9. The suspension injection shell-and-tube flue gas cooling device according to claim 1, characterized in that, The inner wall of the quench tower is coated with an anti-corrosion coating.

10. The suspension jet shell-and-tube flue gas cooling device according to claim 1, characterized in that, A high-pressure plunger pump is installed in the first delivery pipe, and the high-pressure plunger pump communicates with the controller.

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