An integrated solid-state thermal storage high-temperature spray washing device

Abstract

This invention proposes an integrated solid-state thermal storage high-temperature spray cleaning device to overcome the technical problems of existing solid-state thermal storage devices being separated from cleaning equipment, resulting in significant heat loss and incompatibility between heat release characteristics and cleaning requirements. The device's internal casing is divided into a relatively independent thermal storage chamber and a cleaning chamber by an insulated partition. The thermal storage chamber contains magnesium-based thermal storage bricks and electric heating wires for storing heat during off-peak electricity hours. The cleaning chamber contains a heat exchanger, a high-pressure water pump, and a spray device. A closed-loop hot air circulation system is formed between the thermal storage chamber and the cleaning chamber via a first air duct, a second air duct, and a variable-frequency centrifugal fan. During operation, high-temperature hot air (500-600°C) from the thermal storage chamber is driven into the cleaning chamber by the fan. In the heat exchanger, it exchanges heat with room-temperature water to generate high-temperature hot water (80-95°C), which is then pressurized by the high-pressure water pump and sent to the spray device to clean the surface of objects. This invention integrates heat storage, heat exchange, and spraying, avoiding heat loss during intermediate pipeline transmission. It enables a large flow of hot water to be supplied quickly during cleaning, and stores heat using low-cost electricity, allowing cleaning operations to be performed when electricity costs are high, significantly reducing operating costs. The equipment is compact, easy to transport, and suitable for high-temperature, high-pressure cleaning in industrial settings.

Description

Technical Field

[0001] This invention belongs to the field of industrial cleaning equipment and provides an integrated solid heat storage high-temperature spray cleaning device. Background Technology

[0002] Solid thermal storage devices are used when electricity consumption is low and power supply is abundant. They convert electrical energy into heat energy and store it in solid thermal storage materials using off-peak electricity. These devices are mainly used in heating, hot water supply, and thermal oil heating, among other applications. Compared to traditional coal-fired boilers, solid thermal storage devices are more energy-efficient, environmentally friendly, and economical, making them popular and widely used in the national "coal-to-electricity" conversion program.

[0003] Meanwhile, in industrial production, there are numerous mechanical parts, oily workpieces, and variously shaped items such as the inside of pipes that require cleaning with high-temperature hot water or steam. Currently, the method of using solid-state thermal storage equipment for high-temperature cleaning has the following main drawbacks: First, the heat storage device and the cleaning equipment are set up separately, resulting in large heat loss. In the existing technology, solid heat storage devices are mostly used as heat sources to provide heat. If high-temperature hot water is needed for cleaning, the heat storage device needs to heat the water and then transport it through water pipes to cleaning equipment such as high-pressure cleaners or steam cleaners. During the transportation process, the hot water will lose a lot of heat when it flows in the pipes. Especially when cleaning stops, the hot water in the pipes will gradually cool down. When cleaning starts again, this cold water needs to be drained and reheated, resulting in energy waste.

[0004] Secondly, the heat release function of solid-state thermal storage devices is incompatible with cleaning conditions. Solid-state thermal storage devices are designed to provide a stable heat supply to meet the heat demands of applications such as heating, relying on a fan to introduce hot air into the heat exchanger for continuous heat exchange during the heat release process. However, cleaning work is short-lived, intermittent, and requires a large amount of water. Cleaning objects with a high-pressure water gun requires generating a large amount of hot water in a short time. Existing solid-state thermal storage devices struggle to rapidly increase the water pressure within a second. Forcibly increasing the airflow would cause a sharp drop in the hot air temperature, thus reducing the heat exchange efficiency.

[0005] Most integrated cleaning devices on the market currently use instantaneous heat sources. While these instantaneous heat sources start up quickly, they also have disadvantages: they have high heating power, which puts a significant strain on the power grid and prevents the use of cheaper electricity to reduce operating costs; secondly, the heating elements operate in high-temperature and high-humidity environments for extended periods, making them prone to scale buildup and corrosion, resulting in a shorter lifespan; and finally, due to the lack of heat storage capacity, they require continuous power supply during operation.

[0006] There is a lack of specific designs for the integration of solid-state thermal storage and cleaning. While existing literature reports on methods for cleaning thermal storage, these methods primarily clean the thermal storage medium itself, not the external objects to be cleaned. For example, CN117433343A discloses a thermal storage device and a dust removal structure for the thermal storage module thereon to remove dust from the surface of the thermal storage medium; CN213542501U discloses a structure for preventing blockage in a regenerative combustion device, using a cleaning structure to clean the area below the thermal storage medium; CN120558011A discloses an online linked RTO thermal storage medium cleaning system for dissolving crystalline blockages on the surface of the thermal storage medium. All of these methods focus on cleaning the thermal storage medium itself, rather than using the heat from the thermal storage medium to clean external objects. The application of solid-state thermal storage devices to clean heating sources, achieving an integrated process of thermal storage-heat exchange-cleaning, is currently unreported in the technical field.

[0007] The present invention proposes corresponding technical solutions to solve the above problems. Summary of the Invention

[0008] This invention proposes a high-temperature spray washing machine with solid heat storage function to solve the problems of existing technologies where the solid heat storage device and the cleaning equipment are separated, resulting in a large amount of heat waste; the heat release characteristics of the solid heat storage device are inconsistent with the cleaning work requirements; existing integrated cleaning machines are all instant heating methods that cannot use low-cost electricity; and there is a lack of design that combines solid heat storage and cleaning.

[0009] A high-temperature spray cleaning device integrating solid heat storage includes a housing, the interior of which is divided into a heat storage chamber and a cleaning chamber, separated by a heat insulation partition.

[0010] The heat storage chamber is equipped with a solid heat storage assembly. The solid heat storage assembly includes at least two sets of heat storage bricks stacked vertically. Each set consists of several magnesium heat storage bricks arranged side-by-side, with air channels between adjacent bricks. An electric heating wire is threaded through each heat storage brick set, and the heating wire is distributed in a serpentine or spiral shape within the air channels. The surface of the heating wire is coated with an anti-oxidation alloy coating. A first insulation layer is attached to the inner wall of the heat storage chamber. A hot air outlet and a hot air return are respectively located at the upper and lower ends of the heat storage chamber.

[0011] The cleaning chamber is equipped with a heat exchanger, a high-pressure water pump, and a spraying device. The heat exchanger is a finned tube heat exchanger, with its inlet connected to an external water pipe and its outlet connected to the inlet of the high-pressure water pump. The outlet of the high-pressure water pump is connected to the spraying device via a high-temperature, high-pressure resistant hose. The spraying device can be a handheld spray gun or a fixed spray frame, with a replaceable nozzle at the end of the spray gun or spray frame. The inner wall of the cleaning chamber is covered with a second insulation layer. A hot air inlet is located at the bottom of the cleaning chamber, and a hot air outlet is located at the top or side. The hot air outlet of the heat storage chamber enters the hot air inlet of the cleaning chamber through a first air duct, while the hot air outlet of the cleaning chamber leads to the hot air return port of the heat storage chamber through a second air duct. A variable frequency centrifugal fan is installed on either the first or second air duct. An electric damper is installed in the first and / or second air duct. The variable frequency centrifugal fan, electric damper, electric heating wire, high-pressure water pump, etc., are all connected to a controller.

[0012] Work process: During off-peak hours, the controller controls the electric heating wire to heat the heat storage brick assembly, and the heat is stored inside the heat storage bricks. During this period, the variable frequency centrifugal fan and high-pressure water pump are either stopped or in low-power operation mode.

[0013] During the cleaning process, the controller activates the variable frequency centrifugal fan and opens the electric air valves on the first and second air ducts. The high-temperature air in the heat storage chamber, reaching temperatures of 400–600°C, is driven by the variable frequency centrifugal fan and enters the cleaning chamber through the first air duct, passing over the outer surface of the finned tube heat exchanger. Cold water from the external water supply line flows through the internal channels of the heat exchanger, undergoing heat transfer with the high-temperature air and heating up to 80–95°C. After heat exchange, the hot air temperature drops to 150–200°C and returns to the heat storage chamber through the second air duct, where it is reheated by the heat storage bricks, thus forming a closed-loop hot air circuit.

[0014] High-temperature hot water is pressurized by a high-pressure pump and then transported to the spray washing equipment, where it is sprayed at high speed onto the material for high-temperature and high-pressure washing. After the spray washing is completed, the control system stops the variable frequency centrifugal fan and the high-pressure pump, and the electric air valve returns to its original position.

[0015] Preferably, a first temperature sensor is installed inside the heat storage chamber to detect the temperature of the heat storage bricks; a second temperature sensor is installed inside the cleaning chamber to detect the temperature of the hot water at the heat exchanger outlet; both the first and second temperature sensors are connected to a controller. The controller controls the speed of the variable frequency centrifugal fan and / or the opening degree of the electric air valve based on the detection result of the second temperature sensor, thereby maintaining the hot water temperature at the outlet of the spraying device constant within 85–95°C.

[0016] Preferably, an energy storage buffer tank may be provided between the output end of the high-pressure water pump and the spraying device to prevent the large flow rate during cleaning from impacting the system and to ensure a smooth water flow.

[0017] Preferably, a drain outlet is provided at the bottom of the cleaning chamber for discharging wastewater after cleaning. This drain outlet is connected to a wastewater recovery pipe, on which a waste heat recovery heat exchanger is installed to heat the cold water entering the heat exchanger.

[0018] Preferably, the heat-storage chamber and the cleaning chamber are separated by a heat-insulating partition consisting of two layers of stainless steel plates with aerogel felt or ceramic fiber sandwiched in between.

[0019] Preferably, the first insulation layer attached to the inner wall of the heat storage chamber is, for example, an expanded perlite insulation board.

[0020] Preferably, the second insulation layer attached to the inner wall of the cleaning chamber is aluminum silicate fiber felt.

[0021] Preferably, the anti-oxidation alloy coating on the surface of the electric heating wire is an iron-chromium-aluminum alloy containing zirconium.

[0022] Preferably, the spray gun of the spraying device is equipped with a switch, which is connected to the controller by a signal line. When the trigger is pressed, the controller controls the variable frequency centrifugal fan and the high-pressure water pump to start, and when the trigger is released, it is turned off after a delay of 5-10 seconds.

[0023] Beneficial effects 1. Integrated design reduces intermediate heat loss: It integrates heat storage, heat exchange, and spraying into one unit, eliminating the need for pipeline transmission and thus reducing heat loss during hot water transmission. According to test results, compared with the traditional "heat storage device + separate cleaning equipment", this device reduces heat loss by approximately 12%.

[0024] 2. Closed-loop hot air circulation with high heat utilization: Hot air circulates in a closed loop between the heat storage chamber and the cleaning chamber. After heat exchange, it still has a certain temperature and flows back to the heat storage chamber for reheating, avoiding a large amount of heat loss. The tested thermal efficiency is greater than 92%.

[0025] 3. Adapt to the instantaneous high flow rate requirements under cleaning conditions. Under the control of the controller, the fan speed and damper opening are changed to quickly bring the water temperature to the required temperature in a short time during the cleaning process, so as to meet the requirements of intermittent, high flow rate spraying.

[0026] 4. Low operating cost by utilizing off-peak electricity: The heat storage chamber stores heat during off-peak hours at night and performs cleaning operations during peak hours during the day, saving about 40%-60% in electricity costs compared to instant electric heating cleaning equipment.

[0027] 5. Compact structure, easy to transport and install: The one-piece shell is small in size and can be equipped with casters or a mobile base, making it suitable for use in factory workshops, construction sites, etc.

[0028] 6. High safety: The heat storage chamber and the cleaning chamber are independent of each other, and the electrical components (electric heating wire, fan motor, etc.) are separated from the high-pressure water flow to prevent electric shock, short circuit and other situations; at the same time, there is a control panel and temperature detection device to achieve functions such as overheating and overpressure alarm. Attached Figure Description

[0029] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the following description will be provided in conjunction with the accompanying drawings. The present invention will be further described in detail with reference to the embodiments.

[0030] Those skilled in the art will be able to use these drawings as needed after understanding the present invention. Only some drawings are briefly described here. Of course, the drawings described below are for illustrative purposes only and are not intended to limit the scope of the present invention.

[0031] Some embodiments of the present invention, which will be readily apparent to those skilled in the art without any inventive effort, are described below. It should be noted that other figures can be obtained from these figures.

[0032] To enable those skilled in the art to better understand the technical solutions of the present invention, the accompanying drawings involved in the embodiments will be described below. These drawings are only used to illustrate some embodiments of the present invention and are not intended to limit the present invention.

[0033] Figure 1 This is a schematic diagram of the overall structure of an integrated solid-state thermal storage high-temperature spray washing device provided in an embodiment of the present invention.

[0034] Figure 2 for Figure 1 A schematic diagram of the layout of the heat storage brick assembly and electric heating wire inside the central heat storage chamber; Figure 3 This is a schematic diagram of the airflow direction of the hot air circulation system in an embodiment of the present invention; Figure 4 This is a schematic diagram of the connection structure between the heat exchanger and the high-pressure water pump in an embodiment of the present invention; Figure 5 This is a schematic diagram of the spray washing device (handheld spray gun) in an embodiment of the present invention; Figure 6 This is an electrical connection block diagram of the control system in an embodiment of the present invention; Figure 7 This is a schematic diagram showing the installation position of the energy storage buffer tank in an embodiment of the present invention; Figure 8 This is a schematic diagram of the waste heat recovery heat exchanger in an embodiment of the present invention.

[0035] The meanings of the markings in the diagram are as follows: 1-Casing; 11-Insulation partition; 12-Heat storage chamber; 13-Cleaning chamber; 14-First insulation layer; 15-Second insulation layer; 16-Wheel caster; 2-Solid heat storage component; 21-Magnesium heat storage brick; 22-Electric heating wire; 23-Airflow channel; 3-Hot air circulation system; 31-First air duct; 32-Second air duct; 33-Variable frequency centrifugal fan; 34-Electric air valve; 4-Heat exchanger; 41-Heat exchanger inlet; 42-Heat exchanger outlet; 5-High pressure water pump; 51-High temperature and high pressure resistant hose; 6-Spraying device; 61-Handheld spray gun; 62-Nozzle; 63-Switch; 7-Controller; 72-First temperature sensor; 73-Second temperature sensor; 8-Energy storage buffer tank; 9-Wastewater recovery pipeline; 91-Drain outlet; 92-Waste heat recovery heat exchanger. Detailed Implementation

[0036] Some exemplary embodiments of the present invention will now be described in detail. These detailed descriptions should not be considered as limitations on the present invention, but rather as further descriptions of some aspects, features, and embodiments of the present invention.

[0037] It should be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the invention. Furthermore, unless otherwise stated or should be understood as limiting by the context, all terms used herein (including technical or scientific terms) have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. For those of ordinary skill in the art, after reading the teachings of this invention, the terms used herein may have specific meanings beyond their literal meanings, and may also have implied meanings beyond their literal meanings. For those of ordinary skill in the art, after reading the teachings of this invention, the numerical ranges mentioned herein may also include their boundary values ​​and ranges of any decimal point precision between them.

[0038] Unless otherwise defined, all technical and scientific terms used herein shall have the meaning as commonly understood by one of ordinary skill in the art. Methods and materials not described in detail herein may be implemented by reference to methods known to one of ordinary skill in the art and commercially available materials. Reference to any of the documents provided is not an admission of the claims, but rather for illustrative or express reference purposes. In the event of any conflict with this specification, the contents of this specification shall prevail.

[0039] Various changes and modifications can be made to the specific embodiments described in this specification without departing from the scope or spirit of the invention, as will be apparent to those skilled in the art. Other embodiments can also be deduced from the content disclosed in this specification, which will also be obvious to those skilled in the art. This specification and its embodiments are merely examples.

[0040] Example like Figures 1 to 8 As shown, the present invention discloses an integrated solid heat storage high-temperature spray washing device, including a housing 1, a heat storage chamber 12, a washing chamber 13, a hot air circulation system 3, a heat exchanger 4, a high-pressure water pump 5, a spray washing device 6, and a controller 7.

[0041] The casing 1 is welded from Q235B steel plate, with external dimensions of 1000mm (length) × 800mm (width) × 1200mm (height) and a steel plate thickness of 2.5mm. There are four casters 16 and four shock-absorbing feet on the bottom of the casing. Inside the casing, a vertically placed heat insulation baffle 11 divides the entire casing into a heat storage chamber 12 on the left and a cleaning chamber 13 on the right. The heat insulation baffle 11 is composed of two layers of stainless steel plates, each 1.5mm thick, with a 20mm thick aerogel felt sandwiched in between, for a total thickness of 23mm. Its thermal conductivity is less than or equal to 0.02W / m·K.

[0042] The heat storage chamber 12 measures 550mm in length, 700mm in width, and 1000mm in height. A first insulation layer 14, made of expanded perlite insulation board with a thickness of 80mm and a thermal conductivity of 0.028W / m·K, is adhered to its inner wall. Six rows of heat storage bricks are vertically placed inside the chamber. Each brick group contains six 95 magnesia bricks (240mm × 115mm × 65mm) arranged sequentially along its length. An air channel 23 is formed by a 12mm gap between two adjacent magnesia bricks. The magnesia bricks have a relatively rough surface with numerous pores, a porosity of 20%, and a bulk density of 2.9g / cm³. 3 There is a 15mm interval between two adjacent rows of heat storage bricks.

[0043] The electric heating wire 22 is made of iron-chromium-aluminum alloy with 0.5% zirconium added, has a diameter of 3.2 mm, and a power density of 4.2 W / cm³. 2 The electric heating wire is threaded in a serpentine pattern between each layer of bricks and fixed to the bricks by ceramic insulators. The total heating power is 48kW. There is a small 100mm×80mm hot air outlet at the center of the top of the heat storage chamber, and a hot air return outlet with the same diameter at the center of the bottom.

[0044] A first temperature sensor 72 is installed in the middle of the rear wall of the heat storage chamber, with the probe extending to the center of the heat storage brick assembly. The internal dimensions of the cleaning chamber 13 are 400mm long × 700mm wide × 1000mm high. A second insulation layer 15 is attached to its inner surface. The second insulation layer is made of aluminum silicate fiber felt, 60mm thick, with a thermal conductivity of 0.035W / m·K. A finned tube heat exchanger 4 is installed on the right wall of the cleaning chamber. The main dimensions of this heat exchanger are 250mm long × 400mm wide × 600mm high. Its base tube is a φ16×1.5mm copper tube, and the fins are 0.2mm thick aluminum fins with a fin spacing of 3mm, for a total area of ​​12m². 2 The lower end of heat exchanger 4 is fixed to the bottom of the cleaning chamber with support feet, and its left end is about 50mm away from the heat insulation plate 11 so that hot air can blow over it.

[0045] The heat exchanger inlet 41 is located on the lower right side of the heat exchanger and connects to an external water supply line; the heat exchanger outlet 42 is located on the upper right side of the heat exchanger and connects to the inlet of the high-pressure water pump 5 via a DN15 stainless steel flexible hose. The high-pressure water pump 5 is a three-plunger high-pressure pump with a rated flow rate of 15 L / min, a rated pressure of 15 MPa, and a motor power of 5.5 kW. The high-pressure water pump 5 is installed at the bottom right side of the cleaning chamber and supported by rubber pads.

[0046] The outlet of the high-pressure water pump 5 is connected to the energy storage buffer tank 8, which has a volume of 3L and a nitrogen filling pressure of 1.5MPa. The outlet of the buffer tank is connected to the right side wall of the machine casing via a high-temperature and high-pressure resistant hose 51, and then connected to a handheld spray gun 61. The spray gun body is made of aluminum, and the spray gun head has a detachable stainless steel nozzle 62. There is a trigger switch 63 at the trigger position of the spray gun.

[0047] At the bottom of the cleaning chamber is a drain outlet 91, which is connected to the waste liquid collection pipe 9. A waste heat recovery heat exchanger 92 is installed on this pipe to heat the cold water entering the heat exchanger 4, with a design temperature increase of 10℃.

[0048] A pipe is connected to the outlet 42 of the heat exchanger in the cleaning chamber, and a second temperature sensor 73 is installed on this pipe.

[0049] The first air duct 31 is a rectangular duct measuring 100mm × 80mm, made of 1.5mm galvanized steel sheet. Starting from the hot air outlet at the top of the heat storage chamber 12, the first air duct runs horizontally to the right through a hole in the insulation partition 11, then turns downwards by 90° to reach the hot air inlet at the bottom of the cleaning chamber 13. Two devices are installed in the horizontal section of the first air duct 31: a variable frequency centrifugal fan 33 and an electric air valve 34. The variable frequency centrifugal fan 33 can handle air volumes ranging from 500 to 3000 m³ / h. 3The air pressure can vary between 1500 and 2800 Pa, and the motor power is 1.5 kW, controlled by a frequency converter. The electric air valve 34 is a double-leaf adjustable damper, and its actuator is controlled by a 0-10V analog signal, with the opening degree adjustable within the range of 0%-100%.

[0050] The second air duct 32 has the same dimensions as the first air duct. It starts from the hot air outlet at the top of the cleaning chamber 13, runs horizontally to the left through another hole in the upper part of the heat insulation partition 11, bends downward at 90 degrees, and reaches the hot air return port at the bottom of the heat storage chamber 12. The second air duct has no fan or damper, only a check valve.

[0051] Controller 7 is a PLC controller, located in the control box above chassis 1. The input terminals of controller 7 are connected to the first temperature sensor 72, the second temperature sensor 73, and switch 63, and the output terminals are connected to the electric heating wire 22, the variable frequency centrifugal fan 33, the electric air valve 34, and the high-pressure water pump 5 through AC contactors and solid-state relays.

[0052] The controller 7 stores a PID control algorithm with coefficient Kp=2.5, integral time Ti=60s, and derivative time Td=10s. The target outlet water temperature is set to 90℃. If the second temperature sensor 73 measures a hot water temperature less than 87℃, the controller increases the fan speed by 100r / min every 10 seconds, but not exceeding 2800r / min. If the fan has reached its maximum speed and the temperature is still below 87℃, the electric damper 34 is reduced by 5% each time. If the temperature exceeds 93℃, the fan speed is reduced first. If the fan has reached its minimum speed of 500r / min and the temperature is still above 93℃, the electric damper 34 is closed, and the machine stops after five seconds.

[0053] Safety protection: When the first temperature sensor 72 detects that the temperature of the heat storage chamber is higher than 650℃, the controller immediately disconnects the power supply to the electric heating wire 22 and issues an alarm; when the high-pressure water pump 5 is overloaded or the pressure in the hose is greater than 20MPa (monitored by the internal pressure switch), the controller also stops the water pump and issues an alarm.

[0054] The working process and test data are as follows: (1) Off-peak electricity heat storage stage Between 22:00 and 6:00 the next morning, the controller controls the electric heating wire 22 to operate, heating the heat storage brick group at a power of 48kW for 8 hours. During this period, the first temperature sensor 72 detects that the average temperature of the heat storage bricks has increased from the original 22℃ to 565℃. Based on the specific heat capacity of magnesium bricks of 0.92kJ / (kg·℃) and the total mass of 350kg, the total stored heat is calculated to be approximately 136kWh. After that, the power supply to the electric heating wire is cut off, and the heat storage chamber is kept warm. When the ambient temperature is 25℃, in the next 6 hours (i.e., before 12:00 the next morning), the average temperature of the heat storage bricks drops to 532℃, the heat loss rate is 2.2% / h, and the total heat loss accounts for 13% of the total.

[0055] (2) Cleaning operation stage The operator holds the spray gun 61 and presses the switch 63. After receiving the signal, the controller first starts the variable frequency centrifugal fan 33, opens the electric air valve 34 to the fully open position, waits 2 seconds, and then starts the high-pressure water pump 5. The high-temperature air in the heat storage chamber is drawn out by the fan and sent into the cleaning chamber through the first air duct 31, rising to the outside of the heat exchanger 4, where it transfers heat with the cold water located in the tube side of the heat exchanger. After releasing heat, the air temperature drops to 170-180℃, and then returns to the bottom of the heat storage chamber through the second air duct 32, where it is reheated by the heat storage bricks to form a loop. The outlet water temperature of the heat exchanger rises to 90℃ within 40 seconds after the start, and then is kept constant by PID control.

[0056] A cleaning test was conducted after 30 minutes of continuous operation. The results are shown in Table 1.

[0057]

[0058] Pressure fluctuation ≤4.7%, temperature fluctuation within ±2℃. The cumulative output of 90℃ hot water is approximately 375L (calculated at an average flow rate of 12.5L / min, due to intermittent trigger operation). The average temperature of the thermal storage brick decreases from 532℃ to 486℃, a temperature drop of 46℃, releasing approximately 44kWh of heat. The power consumption of the hot air circulation system is: fan 1.5kW × 0.5h = 0.75kWh, water pump 5.5kW × 0.42h (total jetting time) = 2.31kWh, totaling 3.06kWh. The system thermal efficiency is approximately 86% (output heat 44kWh / total input electrical energy 51.06kWh), and because the thermal storage brick stores off-peak electricity at low prices, it has good economic efficiency.

[0059] Compared with a traditional solid thermal storage device + independent high-pressure washer (50-meter pipeline delivery), under the same conditions, i.e. both provide 90℃ hot water, the total water consumption is 375L. Heat loss: Traditional methods measure a temperature drop of 7.2°C during pipeline transportation, with a heat loss of approximately 11.8%, while this equipment eliminates pipeline losses.

[0060] Power Consumption: The traditional method uses a thermal storage device to heat water (off-peak electricity storage) + the cleaning machine itself for insulation, consuming a total of 82 kWh (theoretically, heating 375L of water from 20℃ to 90℃ requires 30.6 kWh, plus pipe losses and reheating, etc.). This equipment consumes approximately 48 kWh of off-peak electricity storage (8 hours × 6kW average power; however, considering the total stored heat is 136 kWh, the power consumption corresponding to releasing 44 kWh of heat is approximately 48 × 44 / 136 ≈ 15.5 kWh), plus the 3.06 kWh consumed during the cleaning process, totaling approximately 18.6 kWh. The total power consumption of this equipment per ton of 90℃ hot water is approximately 49.6 kWh, saving approximately 39.5% compared to the traditional method.

[0061] Cleaning effect: The nozzle outlet temperature of this machine can reach 90℃ in just 40 seconds, while the traditional method requires waiting for the cold water in the pipe to run out before cleaning can begin, which usually takes 2-3 minutes. This product can be used in industries such as machining and petrochemicals to clean, degrease, and unclog pipes. It can significantly reduce cleaning costs when electricity prices are lower at night. It is also easy to move and can be moved to different work locations.

[0062] Although some embodiments of the present invention have been shown and described, those skilled in the art can make various changes, modifications, substitutions and variations without departing from the principles and spirit of the present invention; therefore, the scope of the present invention should be determined by the appended claims; the above description describes some embodiments of the present invention, and the various illustrative descriptions do not constitute a limitation on the implementation of the present invention. After reading the above description, those skilled in the art can make various modifications or variations to the specific embodiments described above without departing from the spirit and scope of the present invention.

Claims

1. An integrated solid-state thermal storage high-temperature spray washing device, comprising a housing (1), characterized in that, Also includes: A heat storage chamber (12) is disposed inside the housing (1). The heat storage chamber (12) is provided with a solid heat storage component (2) and an electric heating wire (22) for heating the solid heat storage component (2). A cleaning chamber (13) is located inside the housing (1) and is separated from the heat storage chamber (12). The cleaning chamber (13) is equipped with a heat exchanger (4), a high-pressure water pump (5) and a spray cleaning device (6). The inlet (41) of the heat exchanger (4) is connected to an external water pipe, the outlet (42) of the heat exchanger (4) is connected to the inlet of the high-pressure water pump (5), and the outlet of the high-pressure water pump (5) is connected to the spray cleaning device (6). The hot air circulation system (3) includes a first air duct (31) and a second air duct (32). The first air duct (31) connects the hot air outlet of the heat storage chamber (12) and the hot air inlet of the cleaning chamber (13). The second air duct (32) connects the hot air outlet of the cleaning chamber (13) and the hot air return port of the heat storage chamber (12). A variable frequency centrifugal fan (33) and an electric air valve (34) are provided on the first air duct (31) or the second air duct (32). The hot air circulation system (3) constitutes a closed hot air circulation loop.

2. The integrated solid-state thermal storage high-temperature spray washing equipment according to claim 1, characterized in that: The housing (1) is provided with a heat insulation partition (11) inside, which divides the housing (1) into the heat storage chamber (12) and the cleaning chamber (13).

3. The integrated solid-state thermal storage high-temperature spray washing equipment according to claim 1, characterized in that: The solid heat storage component (2) consists of at least two vertically arranged magnesium heat storage bricks (21). There are gaps between each pair of magnesium heat storage bricks (21) and between the upper group of magnesium heat storage bricks (21) and the lower group of magnesium heat storage bricks (21) as air channels (23). The electric heating wire (22) is placed in the air channel (23) in a serpentine or spiral manner.

4. The integrated solid-state thermal storage high-temperature spray washing equipment according to claim 1, characterized in that: The outlet of the high-pressure water pump (5) is connected to the spray washing device (6), and an energy storage buffer tank (8) is provided between the outlet of the high-pressure water pump (5) and the spray washing device (6).

5. The integrated solid-state thermal storage high-temperature spray washing equipment according to claim 1, characterized in that: The bottom of the cleaning chamber (13) is provided with a drain outlet (91), which is connected to the wastewater recovery pipeline (9). The wastewater recovery pipeline is provided with a waste heat recovery heat exchanger (92), and the external water supply pipeline is connected to the liquid inlet (41) of the heat exchanger (4) after passing through the waste heat recovery heat exchanger (92).

6. The integrated solid-state thermal storage high-temperature spray washing equipment according to claim 1, characterized in that: The heat storage chamber (12) is equipped with a first temperature sensor (72), and a second temperature sensor (73) is installed on the pipeline between the outlet (42) of the heat exchanger (4) and the high-pressure water pump (5). The first temperature sensor (72), the second temperature sensor (73), the electric heating wire (22), the variable frequency centrifugal fan (33), the electric air valve (34) and the high-pressure water pump (5) are all connected to the controller (7).

7. The integrated solid-state thermal storage high-temperature spray washing equipment according to claim 6, characterized in that: The controller (7) is a PLC controller with a PID control program inside. It controls the speed of the variable frequency centrifugal fan (33) or the opening degree of the electric air valve (34) by using the data measured by the second temperature sensor (73).

8. The integrated solid-state thermal storage high-temperature spray washing equipment according to claim 1, characterized in that: The spraying device (6) is a handheld spray gun (61), which has a switch (63) and is electrically connected to the controller (7).

9. The integrated solid-state thermal storage high-temperature spray washing equipment according to claim 1, characterized in that: The bottom of the housing (1) is provided with casters (16), and the electric heating wire (22) is an iron-chromium-aluminum alloy wire with an outer layer of anti-oxidation alloy material.

10. A method for controlling the spraying temperature based on the integrated solid-state thermal storage high-temperature spraying equipment as described in claim 6, characterized in that, Includes the following steps: (S1) Set the target outlet water temperature; (S2) Turn on the variable frequency centrifugal fan (33) and electric air valve (34) to make the hot air circulate in the heat storage chamber (12) and cleaning chamber (13) in a closed loop; (S3) The second temperature sensor (73) monitors the outlet water temperature of the heat exchanger (4) and sends a signal to the controller (7); (S4) When the outlet water temperature is lower than the set value, the controller (7) increases the speed of the variable frequency centrifugal fan (33) and / or decreases the opening of the electric air valve (34); when the outlet water temperature is higher than the set value, the controller (7) decreases the speed of the variable frequency centrifugal fan (33) and / or increases the opening of the electric air valve (34). (S5) When the first temperature sensor (72) in the heat storage chamber (12) detects that the temperature is too high, the controller (7) disconnects the power supply to the electric heating wire (22).

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