A mobile multifunctional cleaning vehicle

Abstract

The utility model relates to mechanical equipment technical field, concretely relates to a mobile multifunctional cleaning car, including the bearing platform, the bearing platform top is provided with reagent tank, reagent tank bottom outlet is connected with circulating pump, and the circulating pump output is connected with heating / cooler through pipeline, and heating / cooler fluid outlet is connected with the switching valve group for changing reagent flow direction, the switching valve group links respectively with reboiler and reagent tank, the water seal tank group is connected with tail gas recovery unit through pipeline at reagent tank top tail gas outlet, the utility model discloses through switching valve group changes reagent flow direction, supports'high in -low out'and'low in -high out'two modes, effectively removes the compact scale layer between the shell -side inner wall and the tube bundle of reboiler, promotes the thoroughness of cleaning, solves the pain point that traditional one -way cleaning is easy to leave dead angle.

Description

Technical Field

[0001] This utility model relates to the field of mechanical equipment technology, specifically to a mobile multi-functional cleaning vehicle. Background Technology

[0002] In the refining unit of an acrylonitrile plant, the reboiler, as the core heat exchange device, functions to achieve vaporization and distillation separation of process fluids by circulating and heating lean water (mainly water, trace amounts of unreacted acrylonitrile monomers, and byproducts) from the bottom of the column. However, the acrylonitrile monomers remaining in the lean water are highly susceptible to self-polymerization under high temperatures (typically operating at 80–120°C) and the catalytic action of metal ions (such as iron ions), generating linear or cross-linked polyacrylonitrile (PAN) polymers. Simultaneously, the lean water may also contain byproducts such as cyanohydrins and cyanide ethers, which further participate in the polymerization or deposition process. These polymers gradually accumulate on the inner wall of the reboiler shell and between the tube bundles, forming a dense, viscous scale layer. Once the shell-side flow channels are blocked by polymers, the lean water circulation rate is limited, the bottom liquid level fluctuates, the pressure differential of the distillation column increases, and in severe cases, an interlock shutdown is triggered.

[0003] After the reboiler shell side becomes clogged, a cleaning company needs to be contacted for chemical cleaning. The cleaning company needs to assemble equipment such as storage tanks, pumps, and heaters on-site. The installation process is complicated, relies on professional personnel, and the commissioning cycle can take several days, which takes up a lot of time, prolongs the downtime, and affects the production plan. In addition, the cleaning equipment has a single function, poor cleaning effect, large consumption of cleaning agents, and high cost. During the downtime for cleaning the reboiler, acrylonitrile production is affected, resulting in economic losses. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a mobile multi-functional cleaning vehicle.

[0005] To achieve the above objectives, the technical solution of this utility model is as follows: a mobile multi-functional cleaning vehicle, including a carrying platform, a chemical tank is provided on the top of the carrying platform, a circulation pump is connected to the bottom outlet of the chemical tank, a heater / cooler is connected to the output port of the circulation pump through a pipe, a switching valve group for changing the flow direction of the chemical is connected to the fluid outlet of the heater / cooler, the switching valve group is connected to a reboiler and the chemical tank respectively, a water seal tank group is connected to the top of the chemical tank through a pipe, and a tail gas recovery device is connected to the tail gas outlet of the water seal tank group.

[0006] Furthermore, a jet pump is installed above the circulating pump. One end of the jet pump is connected to the reagent tank, and the other end is connected to the connecting pipe between the circulating pump and the heat exchanger.

[0007] Furthermore, the medicine container is equipped with a first baffle and a second baffle, the first baffle being a stainless steel plate and the second baffle being a filter screen.

[0008] Furthermore, a liquid collection tank is provided at the bottom of the medicine tank on the side near the circulating pump.

[0009] Furthermore, a level gauge is installed inside the medicine container.

[0010] Furthermore, the medicine container is equipped with corrosion-resistant coatings.

[0011] Furthermore, the water seal tank assembly includes a first water seal tank and a second water seal tank connected in series.

[0012] Furthermore, the bottom of the support platform is equipped with casters.

[0013] The beneficial effects achieved by this utility model are as follows:

[0014] 1. This utility model changes the direction of the agent flow by switching valve groups, supporting two modes: "high inlet, low outlet" and "low inlet, high outlet". It effectively removes the dense scale layer on the inner wall of the reboiler shell and between the tube bundles, improves the thoroughness of cleaning, and solves the problem of traditional unidirectional cleaning leaving dead corners.

[0015] 2. Steam or cooling water can be introduced into the shell side of the heater / cooler to heat or cool the cleaning agent, controlling it at the optimal reaction temperature to ensure the dissolution efficiency of polyacrylonitrile (PAN) polymers. After passing through the reboiler, the agent returns to the agent tank and is purified by two baffles: one (for settling solid particles) and the other (for filtering light impurities). This achieves agent recycling, reduces consumption, and lowers cleaning costs.

[0016] 3. The dual-stage water seal tanks are connected in series to treat the exhaust gas. Most of the toxic volatiles are absorbed and dissolved in the water, the wastewater is discharged into the wastewater treatment device, and a small amount of exhaust gas enters the waste gas treatment facility of the device, thus avoiding environmental pollution. The built-in corrosion plate monitors the equipment wear in real time, and the liquid level gauge accurately controls the dosage, providing double protection for operational safety.

[0017] 4. This utility model integrates the reagent tank, circulating pump, heater / cooler, and switching valve group into one unit, achieving "plug and play". It eliminates the need for temporary construction of pipelines and equipment, reduces reliance on professional personnel, and significantly improves the ease of operation. The modular layout of each component facilitates rapid fault diagnosis and repair. The system is compatible with different cleaning agent types and can be extended to other chemical equipment cleaning scenarios, such as the shell side and pipeline of heat exchanger equipment, thereby improving equipment utilization.

[0018] 5. The liquid collection tank design enables the circulating pump to efficiently draw liquid at low liquid levels, reducing the initial dosage of the agent; the jet pump uses fluid power to automatically replenish the liquid, reducing manual intervention and further reducing operating costs.

[0019] 6. Dosing and preparation of reagents: Solid reagents can be poured in from the top of the reagent tank; liquid reagents can be drawn in through the injector, making reagent preparation and dosing convenient. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0021] The markings in the diagram are as follows: 1. Support platform; 2. Chemical tank; 3. Circulation pump; 4. Jet pump; 5. Heater / cooler; 6. Switching valve assembly; 7. Reboiler; 8. Water seal tank assembly; 9. Tail gas recovery device; 11. Casters; 21. Baffle 1; 22. Baffle 2; 23. Collection tank; 81. Water seal tank 1; 82. Water seal tank 2. Detailed Implementation

[0022] To better understand the purpose, structure, and function of this utility model, a mobile multi-functional cleaning vehicle of this utility model will be described in further detail below with reference to the accompanying drawings.

[0023] like Figure 1 As shown, a mobile multi-functional cleaning vehicle includes a carrying platform 1. A cleaning agent tank 2 is positioned at the center of the upper part of the carrying platform 1. A circulation pump 3 is connected to one side of the cleaning agent tank 2 via a pipe. The output port of the circulation pump 3 is connected to a heater / cooler 5 via a pipe. The heater / cooler 5 is positioned above the cleaning agent tank 2 and is stably supported by a support frame. The circulation pump 3 can transport the cleaning agent in the cleaning agent tank 2 to the heater / cooler 5. The heater / cooler 5 can heat or cool the cleaning agent, controlling its temperature to maintain it at the optimal cleaning temperature and ensure the cleaning effect of the reboiler 7. The cleaning agent outlet of the heater / cooler 5 is connected to a switching valve assembly 6 via a pipe. The switching valve assembly 6 is connected to both the reboiler 7 and the cleaning agent tank 2. The switching valve assembly 6 can be used to change the flow direction of the cleaning agent. When cleaning the shell side of the reboiler 7, the cleaning agent can switch online between two states: high inlet and low outlet, or low inlet and high outlet, to perform forward and reverse cleaning of the reboiler 7, improving the cleaning effect. The top of the medicine tank 2 is connected to a water seal tank assembly 8 via a pipe. The water seal tank assembly 8 is located on one side of the medicine tank 2 and on the support platform 1. The water seal tank assembly 8 is used to clean the exhaust gas inside the medicine tank 2. The exhaust gas outlet of the water seal tank assembly 8 is connected to an exhaust gas recovery device 9.

[0024] A jet pump 4 is installed above the circulation pump 3. One end of the jet pump 4 is connected to the middle of the agent tank 2, and the other end is connected to the connecting pipe between the circulation pump 3 and the heater / cooler 5. It is powered by the circulating agent, and the subsequent replenishment of the cleaning agent can be drawn in by the jet pump 4.

[0025] The bottom of the medicine tank 2 is equipped with baffle 1 21 and baffle 22. The height of baffle 1 21 and baffle 22 is greater than one-third and less than two-thirds of the height of the side wall of the medicine tank 2. Baffle 1 21 and baffle 22 divide the internal space of the medicine tank 2 into three equal parts. Baffle 1 21 is closer to the side of the water seal tank group 8, and baffle 22 is closer to the side of the circulating pump 3. The inlet of the connecting pipe between the switching valve group 6 and the medicine tank 2 is located above the space between baffle 1 21 and the side wall of the medicine tank 2. Baffle 1 21 is a stainless steel plate, and baffle 22 is a filter screen. The cleaning agent flows out of the reboiler 7 and returns to the agent tank 2 via the switching valve assembly 6. The cleaning agent first falls into the space between baffle 1 21 and the side wall of the agent tank 2. As the agent level rises, the agent overflows baffle 1 21 and enters the space between baffle 1 21 and baffle 2 22. Then, it is filtered by baffle 2 22 and flows into the space between baffle 2 22 and the side wall of the agent tank 2. Solid particles in the cleaning agent after cleaning the reboiler 7 will settle in the space between baffle 1 21 and the side wall of the agent tank 2. Baffle 2 22 filters out lighter impurities in the agent, retaining them in the space between baffle 1 21 and baffle 2 22. The filtered, clean agent enters the space between baffle 2 22 and the side wall of the agent tank 2 to continue circulating and cleaning the shell side of the reboiler 7.

[0026] A liquid collection tank 23 is provided at the bottom of the chemical tank 2 near the circulating pump 3. The liquid collection tank 23 facilitates the circulating pump 3 to extract the chemical from the chemical tank 2, which can ensure that the cleaning operation is carried out in a low liquid level state and reduce the amount of chemical used.

[0027] The chemical tank 2 is equipped with corrosion-resistant plates, allowing staff to measure their weight at any time and monitor the corrosion status of the equipment. A level gauge is also installed inside the chemical tank 2 to monitor the level of the chemical solution and allow for timely replenishment.

[0028] The water seal tank group 8 includes a first water seal tank 81 and a second water seal tank 82 connected in series. The exhaust gas in the agent tank 2 first enters the first water seal tank 81 and then enters the second water seal tank 82. After being washed with water, the exhaust gas enters the exhaust gas recovery device 9 to prevent the exhaust gas from polluting the surrounding environment.

[0029] The bottom of the support platform 1 is equipped with casters 11, which facilitates transporting the support platform 1 to the side of the reboiler 7 to be cleaned.

[0030] In operation, the cleaning agent is added to the cleaning agent tank 2 through the manhole. The switching valve assembly 6 is connected to the shell side of the reboiler 7 via a metal hose. The circulation pump 3 is started, and the circulation pump 3 delivers the cleaning agent in the cleaning agent tank 2 to the heater / cooler 5. The heater / cooler 5 controls the temperature of the cleaning agent. The cleaning agent enters the reboiler 7 through the switching valve assembly 6, with high inlet and low outlet. The cleaning agent flowing out of the reboiler 7 enters the space between the first baffle 21 and the side wall of the cleaning agent tank 2. After sedimentation in the space between the first baffle 21 and the side wall of the cleaning agent tank 2, and then filtered by the second baffle 22, the cleaning agent re-enters the circulation pump 3 for circulation. During the circulation of the cleaning agent, the jet pump 4 can be turned on, using the circulating agent as power. Subsequent replenishment of the cleaning agent can be achieved by using the jet pump 4.

[0031] After the reboiler 7 shell side is cleaned at high inlet and low outlet for a period of time, the circulation of the cleaning agent is stopped, the switching valve group 6 is adjusted to make the cleaning agent cleaned at low inlet and high outlet, and then the reboiler 7 is cleaned in reverse to improve the cleaning efficiency and ensure the cleaning effect of the reboiler 7.

[0032] It is understood that this utility model has been described through some embodiments, and those skilled in the art will recognize that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of this utility model. Furthermore, under the teachings of this utility model, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the protection scope of this utility model.

Claims

1. A mobile multi-functional cleaning vehicle, characterized in that: The device includes a support platform (1), a medicine tank (2) is provided on the top of the support platform (1), a circulation pump (3) is connected to the bottom outlet of the medicine tank (2), a heater / cooler (5) is connected to the output port of the circulation pump (3) through a pipe, a switching valve group (6) for changing the flow direction of the medicine is connected to the fluid outlet of the heater / cooler (5), the switching valve group (6) is connected to the reboiler (7) and the medicine tank (2) respectively, a water seal tank group (8) is connected to the top of the medicine tank (2) through a pipe, and a tail gas recovery device (9) is connected to the tail gas outlet of the water seal tank group (8).

2. The mobile multi-functional cleaning vehicle according to claim 1, characterized in that: A jet pump (4) is installed above the circulation pump (3). One end of the jet pump (4) is connected to the medicine tank (2), and the other end is connected to the connecting pipe between the circulation pump (3) and the heater / cooler (5).

3. The mobile multi-functional cleaning vehicle according to claim 1, characterized in that: The medicine container (2) is equipped with a first baffle (21) and a second baffle (22). The first baffle (21) is a stainless steel plate, and the second baffle (22) is a filter screen.

4. A mobile multi-functional cleaning vehicle according to claim 1, characterized in that: The bottom of the medicine tank (2) near the circulating pump (3) is provided with a liquid collection tank (23).

5. A mobile multi-functional cleaning vehicle according to claim 1, characterized in that: The medicine tank (2) is equipped with a level gauge.

6. A mobile multi-functional cleaning vehicle according to claim 1, characterized in that: The medicine container (2) is equipped with corrosion-resistant plates.

7. A mobile multi-functional cleaning vehicle according to claim 1, characterized in that: The water seal tank group (8) includes a first water seal tank (81) and a second water seal tank (82) connected in series.

8. A mobile multi-functional cleaning vehicle according to claim 1, characterized in that: The bottom of the support platform (1) is provided with casters (11).

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