Efficient heat recoverer and slurry waste heat recycling system based on recoverer

Abstract

The utility model discloses an efficient heat recoverer and based slurry waste heat recycling system, including rectangular plate, heat exchanger main part and internal low frequency vibrator, heat exchanger main part is fixed on the internal low frequency vibrator through support plate, the rectangular plate is connected with the internal low frequency vibrator and support plate, the internal low frequency vibrator is connected with the internal low frequency vibrator through the support plate, and the internal low frequency vibrator is connected with the internal low frequency vibrator through the support plate. According to the efficient heat recoverer and the preheating recycling system, the heat exchange efficiency is high, and meanwhile various problems caused by manual operation can be avoided.

Description

Technical Field

[0001] This utility model belongs to the field of waste heat recovery technology of desulfurization tower slurry, and relates to a high-efficiency heat recovery device and a slurry waste heat recovery and utilization system based on the recovery device. Background Technology

[0002] With the rapid advancement of global industrialization, energy demand is constantly increasing. At the same time, the energy consumption and environmental pollution problems generated during industrial production are becoming increasingly prominent. In particular, the combustion of fossil fuels releases large amounts of harmful gases such as sulfur dioxide into the atmosphere, posing a serious threat to the environment and human health. To mitigate these negative impacts, flue gas desulfurization (FGD) technology has become an indispensable environmental protection measure in many industrial sectors, especially in the power, chemical, and steel industries.

[0003] In flue gas desulfurization (FGD) processes, spray towers are commonly used equipment. They achieve desulfurization by spraying absorbent slurry into the tower, allowing it to fully contact the flue gas containing sulfur dioxide. During this process, the slurry not only absorbs pollutants from the flue gas but also absorbs a significant amount of heat, causing its temperature to rise. However, existing FGD systems often overlook the potential value of this heat energy, resulting in the direct release of waste heat from the desulfurized slurry into the environment, leading to substantial energy waste. Furthermore, existing FGD systems face several technical challenges during operation. After absorbing heat, the slurry easily forms fouling on the heat exchanger surface, reducing heat exchange efficiency and increasing system energy consumption and maintenance costs. Simultaneously, the systems have low levels of automation, relying heavily on manual operation and monitoring, which not only increases labor costs but also limits the system's ability to respond quickly to emergencies. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a high-efficiency heat recovery device and a slurry waste heat recovery and utilization system based on the recovery device. The high-efficiency heat recovery device and system have high heat exchange efficiency and can avoid various problems caused by human operation.

[0005] To achieve the above objectives, this utility model discloses a high-efficiency heat recovery device, including a rectangular plate, a heat exchanger body and an inner low-frequency vibrator. The heat exchanger body is fixed to the inner low-frequency vibrator by a support plate. The rectangular plate is connected to the inner low-frequency vibrator and the support plate. An outer low-frequency vibrator is provided at the lower end of the inner low-frequency vibrator.

[0006] A first annular plate is provided on one end face of the heat exchanger body, and a second annular plate is provided on the other end face of the heat exchanger body. A cold water inlet is provided on the first annular plate, and a cold water outlet is provided on the second annular plate. An inner tube is provided inside the heat exchanger body.

[0007] One end of the inner tube is connected to the cold water inlet, and the other end of the inner tube is connected to the cold water outlet.

[0008] A hot water inlet is provided at the top of the heat exchanger body.

[0009] A hot water outlet is provided at the bottom of the heat exchanger body.

[0010] The hot water inlet and cold water outlet are located on one side of the heat exchanger body, while the hot water outlet and cold water inlet are located on the other side of the heat exchanger body.

[0011] This utility model discloses a slurry waste heat recovery and utilization system, including a spray slurry absorption module, a slurry circulation pump, a heat pump module, a return water heating module, a control system, and a high-efficiency heat recovery unit. The outlet of the spray slurry absorption module is connected to the inlet of the high-efficiency heat recovery unit via the slurry circulation pump, and the outlet of the high-efficiency heat recovery unit is connected to the inlet of the return water heating module via the heat pump module. The control system is connected to the control terminal of the high-efficiency heat recovery unit, the control terminal of the slurry circulation pump, and the control terminal of the heat pump module.

[0012] The control system controls the operation of the external and internal low-frequency vibrators to remove dirt or deposits adhering to the inner wall of the heat exchanger body.

[0013] A filter is installed between the spray slurry absorption module and the slurry circulation pump.

[0014] It also includes a self-cleaning and anti-scaling module for rinsing the filter screen in the filter.

[0015] This utility model has the following beneficial effects:

[0016] In specific operation, the high-efficiency heat recovery device and the slurry waste heat recovery and utilization system based on the present invention have the heat exchanger body fixed to the inner low-frequency vibrator by a support plate. The rectangular plate is connected to the inner low-frequency vibrator and the support plate. An outer low-frequency vibrator is provided at the lower end of the inner low-frequency vibrator. During use, the operation of the outer low-frequency vibrator and the inner low-frequency vibrator is controlled by the control system to remove dirt or deposits adhering to the inner wall of the heat exchanger body, thereby improving the heat exchange efficiency of the high-efficiency heat recovery device and avoiding various problems caused by human operation. Attached Figure Description

[0017] The accompanying drawings, which form part of this specification, are used to provide a further understanding of this utility model. The illustrative embodiments and descriptions of this utility model are used to explain this utility model and do not constitute an undue limitation thereof. In the drawings:

[0018] Figure 1 This is a system block diagram of the present invention;

[0019] Figure 2 This is a structural diagram of the high-efficiency heat recovery device in this utility model;

[0020] Figure 3 This is a side view of the high-efficiency heat recovery device of this utility model;

[0021] Figure 4 This is a structural diagram of the outer shell of the heat exchanger body 1 in this utility model.

[0022] Among them, 1 is the heat exchanger body, 2 is the hot water inlet, 3 is the hot water outlet, 4 is the first annular plate, 5 is the cold water inlet, 6 is the support plate, 7 is the external low-frequency vibrator, 8 is the internal low-frequency vibrator, 9 is the button, 10 is the display screen, 11 is the nut, 12 is the fixing bolt, 13 is the cold water outlet, 14 is the second annular plate, 15 is the inner tube, 16 is the rectangular plate, 17 is the connecting screw, 18 is the carbon steel layer, and 19 is the stainless steel layer. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0024] In the description of this utility model, it should be understood that the terms "comprising" and "including" indicate the presence of the described features, integrals, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or collections thereof.

[0025] It should also be understood that the terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the scope of the invention. As used in this specification and the appended claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise.

[0026] It should also be further understood that the term "and / or" as used in this specification and the appended claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes such combinations. For example, A and / or B can represent three cases: A alone, A and B simultaneously, and B alone. Additionally, the character " / " in this invention generally indicates that the preceding and following objects have an "or" relationship.

[0027] It should be understood that although terms such as first, second, third, etc., may be used to describe preset ranges in the embodiments of this utility model, these preset ranges should not be limited to these terms. These terms are only used to distinguish the preset ranges from one another. For example, without departing from the scope of the embodiments of this utility model, the first preset range may also be referred to as the second preset range, and similarly, the second preset range may also be referred to as the first preset range.

[0028] Depending on the context, the word "if" as used here can be interpreted as "when," "when," "in response to determination," or "in response to detection." Similarly, depending on the context, the phrase "if determination" or "if detection (of the stated condition or event)" can be interpreted as "when determination," "in response to determination," "when detection (of the stated condition or event)," or "in response to detection (of the stated condition or event)."

[0029] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. The components of the embodiments of this utility model described and shown in the accompanying drawings can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this utility model provided in the accompanying drawings is not intended to limit the scope of the claimed utility model, but merely represents selected embodiments of the utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

[0030] The accompanying drawings show various structural schematic diagrams according to embodiments of the present invention. These drawings are not to scale, and some details have been enlarged and may have been omitted for clarity. The shapes of the various regions and layers shown in the drawings, as well as their relative sizes and positional relationships, are merely exemplary and may deviate from reality due to manufacturing tolerances or technical limitations. Furthermore, those skilled in the art can design regions / layers with different shapes, sizes, and relative positions as needed.

[0031] refer to Figure 1 The slurry waste heat recovery and utilization system of this utility model includes a spray slurry absorption module, a slurry circulation pump, a high-efficiency heat recovery unit, a heat pump module, a return water heating module, a control system module, a self-cleaning and anti-scaling module, and auxiliary equipment.

[0032] The outlet of the spray slurry absorption module is connected to the inlet of the high-efficiency heat recovery unit via the slurry circulation pump. The outlet of the high-efficiency heat recovery unit is connected to the inlet of the return water heating module via the heat pump module. The controllable module is connected to the control terminal of the slurry circulation pump and the control terminal of the heat pump module. The self-cleaning and anti-scaling module is connected to the high-efficiency heat recovery unit.

[0033] For details, please refer to Figure 2 , Figure 3 and Figure 4 The high-efficiency heat recovery unit includes a heat exchanger body 1, which is fixed to an inner low-frequency vibrator 8 by several support plates 6. A rectangular plate 16 is connected to the inner low-frequency vibrator 8 and the support plates 6. Specifically, the rectangular plate 16 is connected to the inner low-frequency vibrator 8 by connecting screws 17. An outer low-frequency vibrator 7 is provided at the lower end of the inner low-frequency vibrator 8.

[0034] A first annular plate 4 is provided on one end face of the heat exchanger body 1, and a second annular plate 14 is provided on the other end face of the heat exchanger body 1. A cold flow inlet 5 is provided on the first annular plate 4, and a cold flow outlet 13 is provided on the second annular plate 14. An inner tube 15 is provided inside the heat exchanger body 1, wherein one end of the inner tube 15 is connected to the cold flow inlet 5, and the other end of the inner tube 15 is connected to the cold flow outlet 13.

[0035] Both the first annular plate 4 and the second annular plate 14 are provided with fixing bolts 12 with nuts 11.

[0036] The heat exchanger body 1 has a hot water inlet 2 at the top and a hot water outlet 3 at the bottom. The hot water inlet 2 and the cold water outlet 13 are located on one side of the heat exchanger body 1, and the hot water outlet 3 and the cold water inlet 5 are located on the other side of the heat exchanger body 1.

[0037] The side of the external low-frequency vibrator 7 is provided with a display screen 10 and several buttons 9. The display screen 10 conveniently displays the operation status of the internal low-frequency vibrator 8, making it convenient for staff to observe. The buttons 9 make it convenient for staff to control the operation of the internal low-frequency vibrator 8, thereby meeting different operational needs.

[0038] It should be noted that the outer shell of the heat exchanger body 1 is composed of multiple layers of materials, specifically including a carbon steel layer 18 and a stainless steel layer 19. The carbon steel layer 18 has good strength and hardness and can withstand greater pressure. The stainless steel layer 19 has excellent corrosion resistance to most chemical media and is particularly suitable for use in highly corrosive environments. It can also withstand high-temperature environments and is suitable for high-efficiency heat recovery devices for high-temperature fluids.

[0039] During operation, the external low-frequency vibrator 7 and the internal low-frequency vibrator 8 are controlled by the control system to remove dirt or deposits adhering to the inner wall of the heat exchanger body 1, maintaining a high efficiency of heat exchange. By applying low-frequency vibration, the adhesion of deposits to the equipment surface is weak, thus being washed away. During use, the operation of the internal low-frequency vibrator 8 is turned on to facilitate cleaning operations.

[0040] During operation, the slurry circulation pump delivers the slurry, after absorbing heat, to the high-efficiency heat recovery unit for heat exchange. The high-efficiency heat recovery unit transfers the heat in the slurry to the evaporator of the heat pump module. The heat pump module then improves the heat quality through the compressor and transfers it to the condenser of the heat pump module. The condenser of the heat pump module transfers the heat to the return water, and the heated return water is delivered to the heating water tank by the return water pump for user use.

[0041] A filter is installed between the spray slurry absorption module and the slurry circulation pump to prevent impurities from entering the high-efficiency heat recovery unit and to ensure the flow of the medium.

[0042] The self-cleaning and anti-scaling module is connected to the high-efficiency heat recovery unit. This module includes an ultrasonic anti-scaling device and a self-cleaning filtration system. The ultrasonic anti-scaling device is installed on the high-efficiency heat recovery unit to prevent scale buildup. The self-cleaning filtration system automatically cleans the filter screen, keeping the system clean.

[0043] The spray slurry absorption module brings the desulfurization slurry into full contact with the flue gas through a spray tower, allowing the slurry to absorb heat from the flue gas. Pollutants such as sulfur dioxide in the flue gas are captured by the absorbent in the slurry, achieving the desulfurization effect. The spray tower is equipped with multiple layers of nozzles that atomize the slurry into fine particles to increase the contact area with the flue gas. During operation, the flue gas enters from the bottom of the tower and comes into counter-current contact with the slurry flowing downwards. After heat is transferred to the slurry, the purified flue gas is discharged from the top of the tower.

[0044] The slurry circulation pump draws the slurry that has absorbed the flue gas from the bottom of the spray tower and transports it to the high-efficiency heat recovery unit. The selection of the slurry circulation pump needs to be determined based on parameters such as the slurry flow rate, head, and viscosity. During operation, the start-up, shutdown, and speed of the slurry circulation pump are adjusted by the control system according to the temperature of the slurry in the absorption tower and the desulfurization efficiency to ensure stable system operation.

[0045] The high-efficiency heat recovery unit utilizes the heat in the slurry to heat the circulating water. In the high-efficiency heat recovery unit, the slurry exchanges heat with the circulating water through a plate heat exchanger or a shell-and-tube heat exchanger. After the heat in the slurry is absorbed by the circulating water, the cooled slurry returns to the spray tower, while the heated circulating water flows to the heat pump module.

[0046] The heat pump module utilizes heat pump technology to further increase the temperature of the circulating water, achieving efficient thermal energy utilization. The heat pump module includes components such as a compressor, expansion valve, and evaporator, raising the heat from a low-temperature heat source to a higher temperature suitable for heating or water supply. In the system, the heat pump module absorbs heat from the circulating water and releases it into the return water heating module, thereby increasing the temperature of the return water.

[0047] The return water heating module transfers the heat provided by the heat pump module to the return water, bringing its temperature to the user's desired level. The return water heating module includes a hot water storage tank and a circulating heating system. The heated return water can be used for heating, bathing, or other applications requiring hot water. The design of the return water heating module must ensure efficient heat transfer and stable water temperature output.

[0048] The self-cleaning and anti-scaling module is used to prevent scale buildup inside equipment such as heat exchangers and ensure long-term stable operation of the system. The self-cleaning and anti-scaling module includes a self-cleaning filtration system, an anti-scaling agent addition system, and an online monitoring device.

[0049] It should be noted that the auxiliary equipment includes insulation materials, filters, valves, and pipes, which provide support and assurance for the normal operation of the system. Insulation materials reduce heat loss and improve system efficiency; filters intercept impurities in the slurry, preventing blockages in heat exchangers and heat pumps; valves and pipes connect the various modules, ensuring the medium flows according to the design process. The selection and installation of these auxiliary devices must take into account the system's corrosion resistance, temperature resistance, and long-term operational reliability.

[0050] In this invention, the spray slurry absorption module atomizes the slurry through multiple nozzles, significantly increasing the contact area between the slurry and flue gas, thereby improving desulfurization efficiency and effectively removing pollutants such as sulfur dioxide from the flue gas. Simultaneously, the slurry absorbs heat from the flue gas, enabling subsequent heat recovery and achieving secondary energy utilization. The high-efficiency heat recovery unit is the core of waste heat recovery; it transfers the heat absorbed by the slurry to the circulating water, achieving effective heat recovery and improving the overall energy efficiency of the system. By reducing the slurry temperature, the high-efficiency heat recovery unit helps reduce corrosion of equipment such as the spray tower and circulating pump, thus extending the service life of the equipment. The design and operation of the high-efficiency heat recovery unit ensures stable and efficient system operation during heat absorption and transfer, guaranteeing the continuous operation of the entire system.

[0051] The self-cleaning filtration system automatically cleans the filter screen to prevent impurities from accumulating, ensuring internal system cleanliness and reducing efficiency loss and equipment damage caused by fouling. The ultrasonic anti-scaling device effectively prevents scale buildup inside equipment such as high-efficiency heat recovery units, maintaining heat exchange efficiency and avoiding energy waste and equipment damage caused by scaling. The self-cleaning and anti-scaling modules reduce the frequency of manual cleaning and maintenance, lowering maintenance costs and reducing production losses due to downtime. By preventing fouling and scaling, the system operates more stably, reducing downtime caused by equipment failure and improving overall system reliability. It also reduces corrosion and wear caused by fouling and scaling, thereby extending equipment lifespan and reducing replacement frequency and costs.

[0052] Other embodiments of this utility model will readily conceive of by those skilled in the art upon consideration of the specification and disclosure thereof. This application is intended to cover any variations, uses, or adaptations of this utility model that follow the general principles of this utility model and include common knowledge or customary techniques in the art not disclosed herein. The specification and embodiments are to be considered exemplary only, and the true scope and spirit of this utility model are indicated by the following claims.

[0053] It should be understood that this invention is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this invention is limited only by the appended claims.

[0054] The above description is merely a preferred embodiment of the present utility model and does not constitute any limitation on the present utility model. Any simple modifications, alterations, or equivalent structural changes made to the above embodiments based on the technical essence of the present utility model shall still fall within the protection scope of the present utility model.

Claims

1. A high-efficiency heat recovery device, characterized in that, It includes a rectangular plate (16), a heat exchanger body (1) and an inner low-frequency vibrator (8). The heat exchanger body (1) is fixed to the inner low-frequency vibrator (8) by a support plate (6). The rectangular plate (16) is connected to the inner low-frequency vibrator (8) and the support plate (6). An outer low-frequency vibrator (7) is provided at the lower end of the inner low-frequency vibrator (8).

2. The high-efficiency heat recovery device according to claim 1, characterized in that, A first annular plate (4) is provided on one end face of the heat exchanger body (1), and a second annular plate (14) is provided on the other end face of the heat exchanger body (1). A cold flow inlet (5) is provided on the first annular plate (4), and a cold flow outlet (13) is provided on the second annular plate (14). An inner tube (15) is provided inside the heat exchanger body (1).

3. The high-efficiency heat recovery device according to claim 2, characterized in that, One end of the inner tube (15) is connected to the cold water inlet (5), and the other end of the inner tube (15) is connected to the cold water outlet (13).

4. The high-efficiency heat recovery device according to claim 3, characterized in that, The heat exchanger body (1) is provided with a hot water inlet (2) at the top.

5. The high-efficiency heat recovery device according to claim 4, characterized in that, A hot water outlet (3) is provided at the bottom of the heat exchanger body (1).

6. The high-efficiency heat recovery device according to claim 5, characterized in that, The hot water inlet (2) and the cold water outlet (13) are located on one side of the heat exchanger body (1), and the hot water outlet (3) and the cold water inlet (5) are located on the other side of the heat exchanger body (1).

7. A slurry waste heat recovery and utilization system, characterized in that, The device includes a spray slurry absorption module, a slurry circulation pump, a heat pump module, a return water heating module, a control system, and a high-efficiency heat recovery unit as described in any one of claims 1-3. The outlet of the spray slurry absorption module is connected to the inlet of the high-efficiency heat recovery unit via the slurry circulation pump, and the outlet of the high-efficiency heat recovery unit is connected to the inlet of the return water heating module via the heat pump module. The control system is connected to the control terminal of the high-efficiency heat recovery unit, the control terminal of the slurry circulation pump, and the control terminal of the heat pump module.

8. The slurry waste heat recovery and utilization system according to claim 7, characterized in that, The operation of the external low-frequency vibrator (7) and the internal low-frequency vibrator (8) is controlled by the control system to remove dirt or deposits adhering to the inner wall of the heat exchanger body (1).

9. The slurry waste heat recovery and utilization system according to claim 7, characterized in that, A filter is installed between the spray slurry absorption module and the slurry circulation pump.

10. The slurry waste heat recovery and utilization system according to claim 9, characterized in that, It also includes a self-cleaning and anti-scaling module for rinsing the filter screen in the filter.

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