Deslagging and cleaning device of lean oil heat exchanger

Abstract

The invention relates to the technical field of lean oil heat exchanger cleaning, in particular to a deslagging cleaning device of a lean oil heat exchanger, which comprises a tube box, one end of the tube box is provided with a fixedly connected shell through a bolt, the other end of the shell is provided with a fixedly connected floating head cover II through welding, and an ultrasonic cleaning mechanism is arranged above the shell. The ultrasonic cleaning mechanism comprises a top plate, and the top plate and the shell are fixed through welding; the real-time temperature sensors are used for collecting the temperature of the first liquid inlet flange, the first liquid outlet flange, the second liquid inlet flange and the second liquid outlet flange, the liquid mass flow meter is used for collecting the flow of the first liquid inlet flange and the second liquid inlet flange, and data are sent to the control panel to be analyzed; the control panel calculates the heat transfer amount of lean oil and cooling liquid through a formula, and automatic diagnosis of the working state of the sensor and the sealing performance of the system is achieved by comparing the numerical values of the heat transfer amount in real time.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of lean oil heat exchanger cleaning, in particular to a lean oil heat exchanger deslagging cleaning device. BACKGROUND

[0002] In the production process of eluting benzene, the technical problem of scale accumulation on the lean oil heat exchanger, when the lean oil is heat exchanged, the poor introduction of cooling water can easily lead to serious scaling, and the low thermal conductivity of the scale can cause the heat exchange efficiency to decrease and the lean oil temperature to be out of control, directly affecting the effect of washing benzene.

[0003] Currently, the conventional chemical cleaning method is easy to corrode the equipment and is ineffective for organic deposition, the single mechanical cleaning has cleaning dead angles and is time-consuming, and the single high-pressure water jet needs repeated operation, which cannot effectively solve the scale layer problem.

[0004] Therefore, the present application combines multiple ultrasonic waves and high-pressure water to break through the limitations of traditional single cleaning methods and realize efficient maintenance of the lean oil heat exchanger without disassembly. SUMMARY

[0005] The purpose of the present application is to provide a lean oil heat exchanger deslagging cleaning device to solve the above technical defects.

[0006] To achieve the above-mentioned purpose, the present application adopts the following technical scheme: a lean oil heat exchanger deslagging cleaning device, comprising a tube box, one end of the tube box is provided with a fixedly connected shell through bolts, the other end of the shell is provided with a fixedly connected floating head cover two through welding, the upper part of the shell is provided with an ultrasonic cleaning mechanism, the ultrasonic cleaning mechanism comprises a top plate, the top plate and the shell are fixed through welding;

[0007] The inside of the floating head cover two is provided with a rotating cleaning mechanism, the rotating cleaning mechanism comprises a fixed sleeve, the fixed sleeve and the floating head cover two are fixedly connected through bolts, the lower part of the shell is further provided with a deslagging mechanism, the deslagging mechanism comprises a deslagging box, the deslagging box and the shell are fixedly connected and internally communicated, the outer side of the shell is further provided with a control panel fixedly installed through bolts.

[0008] Preferably, the other side of the tube box is provided with a fixedly connected floating head tube plate, the upper part of the tube box is provided with a fixedly connected liquid inlet flange one, the lower end of the tube box is provided with a fixedly connected liquid outlet flange one, the inside of the liquid inlet flange one and the liquid outlet flange one are both provided with a real-time temperature sensor, one end of the floating head tube plate is provided with a fixedly connected heat transfer pipe, the inside of the liquid inlet flange one is further provided with a liquid mass flowmeter.

[0009] Preferably, the lower part of the shell is fixedly installed with symmetrically distributed support frames, the upper part of the one end of the shell close to the tube box is provided with two internally communicating liquid inlet flanges fixedly connected, the lower part of the other end of the shell is provided with two internally communicating liquid outlet flanges fixedly connected, the interiors of the two liquid inlet flanges and the two liquid outlet flanges are also installed with real-time temperature sensors, and the interior of the liquid inlet flange is also installed with a liquid mass flowmeter.

[0010] Preferably, the upper part of the top plate is fixedly provided with six array-distributed transducers, the bottom of each transducer is provided with an amplitude rod fixedly connected through bolts, the upper part of the top plate is also provided with a top frame fixedly connected, the upper part of the top frame is fixedly installed with two symmetrically distributed ultrasonic generators through bolts, and the ultrasonic generators are electrically connected with the transducers.

[0011] Preferably, the outer side of the part of the fixed sleeve located in the shell is provided with four axially distributed grooves, the interior of the fixed sleeve is provided with an inner sleeve rotatably connected therewith, the outer side of the inner sleeve is provided with four rows of water injection holes axially distributed, the one end of the inner sleeve is provided with a spur gear one fixedly connected after penetrating through the outer side of the floating head cover two, the one end of the water injection hole is provided with a rotary joint fixedly connected through a flange, the lower part of the fixed sleeve is also provided with an extension frame fixedly connected, the one side of the extension frame is fixedly provided with a stepping motor one through bolts, the driving shaft of the stepping motor one is provided with a spur gear two fixedly connected after penetrating through the extension frame, and the spur gear two is engaged with the spur gear one.

[0012] Preferably, the interior of the slag discharge box is provided with a feeding auger rotatably connected, the one side of the support frame is fixedly installed with a stepping motor two through bolts, the driving shaft of the stepping motor two is rotatably connected with the shaft of the one end of the feeding auger through a belt pulley assembly, and the one end of the slag discharge box is provided with an electromagnetic valve fixedly connected.

[0013] Preferably, the real-time temperature sensors installed in the control panel, the liquid inlet flange one, the liquid outlet flange one, the liquid inlet flange two, the liquid outlet flange two, the liquid mass flowmeters installed in the liquid inlet flange one and the liquid inlet flange two constitute a scale thickness monitoring system.

[0014] The real-time temperature sensors are used to collect the liquid inlet and outlet temperatures of each liquid inlet and outlet end and record as T1, T2, t1 and t2 respectively, the liquid mass flowmeters record the liquid flow capacities of each liquid inlet end within 5 seconds and record as M1 and M2 respectively, and the data of T1, T2, t1, t2 and M1, M2 within 5 seconds are sent to the control panel for analysis.

[0015] The control panel calculates the heat transfer amount Q1 and Q2 of the lean oil and the cooling liquid after heat exchange by formula, when Q1=Q2 or the difference between the two is small, it indicates that the real-time temperature sensor and the liquid mass flow meter in the device are normal operation, the subsequent calculated Q1 or Q2 value is compared with QM, when Q1 or Q2 / QM>0.8, no action is needed, when Q1 or Q2 / QM<0.8, the ultrasonic cleaning mechanism, the rotary cleaning mechanism and the deslagging mechanism are started to carry out deslagging and cleaning operation; if the difference between Q1 and Q2 is large, it indicates that the real-time temperature sensor and the liquid mass flow meter are damaged or the cooling liquid and the lean oil are leaked.

[0016] Compared with the prior art, the above technical scheme has the following beneficial effects:

[0017] 1. The present application is through real-time temperature sensor to collect the temperature (T1, T2, t1, t2) of liquid inlet flange one, liquid outlet flange one, liquid inlet flange two and liquid outlet flange two, and liquid mass flow meter to collect the flow (M1, M2) of liquid inlet flange one and liquid inlet flange two, and send the data to the control panel for analysis; the control panel calculates the heat transfer amount (Q1, Q2) of the lean oil and the cooling liquid by formula, and realizes the automatic diagnosis of the working state of the sensor and the sealing property of the system by real-time comparison of the values of Q1 and Q2.

[0018] 2. During normal operation of the equipment, the current heat transfer amount (Q1 or Q2) is compared with the initial reference value (QM) periodically (every hour), when the heat transfer amount is detected to be significantly reduced (lower than 80% of QM), the rotary cleaning mechanism (high-pressure water flushing), the ultrasonic cleaning mechanism and the deslagging mechanism are started in sequence by the control panel to carry out deep cleaning and deslagging operation; based on real-time thermal data monitoring and analysis, and automatic triggering of the closed-loop linkage mechanism of hierarchical response (diagnosis, early warning, cleaning), the operation reliability and maintenance efficiency of the equipment are significantly improved, the performance degradation caused by fouling is effectively prevented, and unnecessary manual intervention is minimized. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 is the overall structure schematic diagram of the present application;

[0020] Figure 2 is the connection structure schematic diagram of the tube box and the heat transfer pipe in the present application;

[0021] Figure 3 is the overall structure side view of the present application;

[0022] Figure 4 is the overall structure cross-sectional view schematic diagram of the present application; Figure 3

[0023] Figure 5 ​is the connection structure schematic diagram of the ultrasonic cleaning mechanism in the application;

[0024] Figure 6 is the connection structure schematic diagram of the rotating cleaning mechanism in the application;

[0025] Figure 7 is the connection structure schematic diagram of the residue discharging mechanism in the application.

[0026] Legend: 1, tube box; 11, liquid inlet flange one; 12, floating head cover one; 13, range partition; 14, floating head tube plate; 15, heat transfer pipe; 16, liquid outlet flange one; 17, shell; 171, support frame; 172, floating head cover two; 18, liquid inlet flange two; 19, liquid outlet flange two; 2, ultrasonic cleaning mechanism; 21, top plate; 22, transducer; 23, amplitude rod; 24, top frame; 25, ultrasonic generator; 3, rotating cleaning mechanism; 31, fixed sleeve; 32, inner sleeve; 33, water injection hole; 34, straight gear one; 35, rotating joint; 36, extension frame; 37, stepper motor one; 38, straight gear two; 4, residue discharging mechanism; 41, residue discharging box; 42, stepper motor two; 43, pulley assembly; 44, feeding auger; 45, electromagnetic valve; 5, control panel. DETAILED DESCRIPTION

[0027] In order to enable personnel in the art to better understand the present application scheme, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, not all. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0028] Embodiment 1: Please refer to Figure 1 - Figure 5 As shown in the figure, the present application is a residue discharging and cleaning device of an oil-lean heat exchanger, which comprises a tube box 1, one side of the tube box 1 is provided with a floating head cover one 12 fixedly connected, the other side of the tube box 1 is provided with a floating head tube plate 14 fixedly connected, the inside center of the tube box 1 is provided with a range partition 13 fixedly connected, the upper part of the tube box 1 is provided with a liquid inlet flange one 11 fixedly connected, a real-time temperature sensor is installed in the inside of the liquid inlet flange one 11, the lower end of the tube box 1 is provided with a liquid outlet flange one 16 fixedly connected, a real-time temperature sensor is also installed in the inside of the liquid outlet flange one 16, one end of the floating head tube plate 14 is provided with a heat transfer pipe 15 fixedly connected;

[0029] It needs to be supplemented here that: the inside of the liquid inlet flange 11 is also provided with a liquid mass flow meter, the partition plate 13 divides the space in the pipe box 1 into an oil inlet cavity and an oil outlet cavity, the heat transfer pipe 15 is in a U shape, and the two ends thereof are communicated with the inside of the oil inlet cavity and the oil outlet cavity respectively, and the real-time temperature sensors installed in the inside of the liquid inlet flange 11 and the liquid outlet flange 1 are used to read the inlet and outlet oil temperature of the lean oil in the device, so as to judge the heat exchange efficiency of the heat transfer pipe 15.

[0030] One end of the pipe box 1 is provided with the fixedly connected shell 17 through bolts, the lower part of the shell 17 is provided with the symmetrically distributed support frame 171 fixedly installed through bolts, the other end of the shell 17 is provided with the fixedly connected floating head cover 2 through welding, the upper part of the one end of the shell 17 close to the pipe box 1 is provided with the fixedly connected liquid inlet flange 2 18 which is internally communicated, the lower part of the other end of the shell 17 is provided with the fixedly connected liquid outlet flange 2 19 which is internally communicated, the inside of the liquid inlet flange 2 18 and the liquid outlet flange 2 19 is also provided with a real-time temperature sensor, and the inside of the liquid inlet flange 2 18 is also provided with a liquid mass flow meter.

[0031] Embodiment 2: please refer to Figure 4 Figure 7 As shown in the figure, the present application is a lean oil heat exchanger slag cleaning device, which comprises a shell 17, and the upper part of the shell 17 is provided with an ultrasonic cleaning mechanism 2, the ultrasonic cleaning mechanism 2 comprises a top plate 21, the top plate 21 is fixed with the shell 17 through welding, the upper part of the top plate 21 is provided with six arrayed transducers 22, the transducers 22 are all fixed with the top plate 21 through bolts, the bottom of the transducer 22 is provided with a fixedly connected amplitude lever 23 through bolts, the upper part of the top plate 21 is also provided with a fixedly connected top frame 24, the upper part of the top frame 24 is provided with two symmetrically distributed ultrasonic wave generators 25 fixedly installed through bolts, and the ultrasonic wave generators 25 are electrically connected with the transducers 22.

[0032] It needs to be supplemented here that: the amplitude lever 23 is installed in the inside of the shell 17 and is sealed, the upper end thereof extends out of the shell 17 and is fixedly connected with the transducer 22, a single ultrasonic wave generator 25 can control three transducers 22 adjacent thereto at the same time, the transducer 22 converts the high-frequency electric signal emitted in the ultrasonic wave generator 25 into mechanical vibration, and then transmits the mechanical vibration to the cleaning liquid in the shell 17 through the amplitude lever 23, so as to achieve the effect of ultrasonic cleaning.

[0033] ​The interior of the floating head cover two 172 is provided with a rotating cleaning mechanism 3, the rotating cleaning mechanism 3 includes a fixed sleeve 31, the fixed sleeve 31 is fixedly connected with the floating head cover two 172, the part outside of the fixed sleeve 31 located in the shell 17 is provided with four axial distribution slots, the interior of the fixed sleeve 31 is provided with an inner sleeve 32 rotationally connected therewith, the outer side of the inner sleeve 32 is provided with four rows of water injection holes 33 distributed in the axial direction, one end of the inner sleeve 32 is provided with a fixedly connected spur gear one 34 outside the floating head cover two 172, one end of the water injection hole 33 is provided with a fixedly connected rotary joint 35 through a flange, the lower side of the fixed sleeve 31 is further provided with a fixedly connected extension frame 36, one side of the extension frame 36 is provided with a step motor one 37 fixedly connected through a bolt, the driving shaft of the step motor one 37 is provided with a fixedly connected spur gear two 38 after penetrating through the extension frame 36, the spur gear two 38 is engaged with the spur gear one 34;

[0034] It needs to be added here that: the other end of the rotary joint 35 is communicated with the external high-pressure water pump, the water inlet end of the high-pressure water pump is communicated with the source of the cleaning liquid, in the initial state, the water injection hole 33 of the inner sleeve 32 is located in the interior of the fixed sleeve 31, so as to prevent the cooling water in the shell 17 from forming scale to block the water injection hole 33;

[0035] When cleaning is needed, the step motor one 37 is started to drive the spur gear two 38 to rotate, the inner sleeve 32 is driven to rotate through the spur gear one 34, so that the water injection hole 33 is located in the slot outside the fixed sleeve 31, then the external cleaning liquid is pumped into the inner sleeve 32 through the rotary joint 35 by starting the high-pressure water pump, and then the cleaning of the heat transfer pipe 15 is carried out by spraying through the water injection hole 33.

[0036] The lower side of the shell 17 is further provided with a slag discharge mechanism 4, the slag discharge mechanism 4 includes a slag discharge box 41, the slag discharge box 41 is fixedly connected with the shell 17 and is communicated in the interior, the interior of the slag discharge box 41 is provided with a rotationally connected feeding auger 44, one side of the support frame 171 is provided with a step motor two 42 fixedly connected through a bolt, the driving shaft of the step motor two 42 is rotationally connected with the shaft at one end of the feeding auger 44 through a belt pulley assembly 43, the lower side of one end of the slag discharge box 41 is provided with a fixedly connected electromagnetic valve 45;

[0037] It needs to be added here that: the shafts at both ends of the feeding auger 44 penetrate through the slag discharge box 41 and are waterproofed, the belt pulley assembly 43 includes two belt pulleys and a transmission belt, the transmission belt is sleeved outside the two belt pulleys, the two belt pulleys are fixedly connected with the shaft at one end of the feeding auger 44 and the driving shaft of the step motor two 42 respectively.

[0038] The outer side of the shell 17 is also fixedly installed with a control panel 5 by bolts, and the control panel 5, the real-time temperature sensor installed in the liquid inlet flange one 11, the liquid outlet flange one 16, the liquid inlet flange two 18, the liquid outlet flange two 19, and the liquid mass flowmeter installed in the liquid inlet flange one 11 and the liquid inlet flange two 18 constitute a scale thickness monitoring system;

[0039] The real-time temperature sensor is used to collect the inlet and outlet liquid temperatures at the liquid inlet flange one 11, the liquid outlet flange one 16, the liquid inlet flange two 18, and the liquid outlet flange two 19, and record the temperature at the liquid inlet flange one 11 as T1, the temperature at the liquid outlet flange one 16 as T2, the temperature at the liquid inlet flange two 18 as t1, and the temperature at the liquid outlet flange two 19 as t2. The liquid mass flowmeter is used to record the liquid flow rates at the liquid inlet flange one 11 and the liquid inlet flange two 18 as M1 and M2 respectively, and send the data of T1, T2, t1, t2 and M1, M2 within 5 seconds to the control panel 5 for analysis;

[0040] The control panel 5 obtains the heat transfer quantity Q1 after the oil lean heat exchange by the formula Q1=M1xC1(T1-T2), and obtains the heat transfer quantity Q2 after the cooling liquid heat exchange by the formula Q2=M2xC2(t2-t1), wherein C1 and C2 are the constant pressure specific heat capacities of the oil lean and the cooling liquid. When Q1=Q2 or the difference between Q1 and Q2 is small, it indicates that the real-time temperature sensor and the liquid mass flowmeter in the device are normally operated;

[0041] When the device is just started, the values of Q1 or Q2 are calculated by the above formula and recorded as QM. During the operation of the device, the analysis is performed every 1h, and the calculated values of Q1 or Q2 are compared with QM. When Q1 or Q2 / QM>0.8, no action is needed. When Q1 or Q2 / QM<0.8, the ultrasonic cleaning mechanism 2, the rotary cleaning mechanism 3, and the deslagging mechanism 4 are started to perform the deslagging and cleaning operation;

[0042] If the difference between Q1 and Q2 is large, it indicates that the real-time temperature sensor and the liquid mass flowmeter are damaged or the cooling liquid and the oil lean are leaked, and the sensor needs to be replaced and repaired manually;

[0043] During the deslagging and cleaning operation, the straight gear two 38 is driven to rotate by the step motor one 37, the straight gear one 34 drives the inner sleeve tube 32 to rotate, so that the water injection hole 33 is located in the slot outside the fixed sleeve tube 31. Then the high-pressure water pump is started to pump the external cleaning liquid into the inner sleeve tube 32 through the rotary joint 35, and then the cleaning liquid is sprayed out through the water injection hole 33 to clean the heat transfer pipe 15, so that part of the scale outside the heat transfer pipe 15 is washed off to reduce the difficulty of subsequent cleaning;

[0044] When the cleaning liquid in the shell 17 submerges the heat transfer pipe 15, two ultrasonic generators 25 are started, and the six variable amplitude rods 23 drive the six variable amplitude rods 23 to the heat transfer pipe 15 through the six transducers 22 for ultrasonic cleaning. After the ultrasonic cleaning is completed, the step motor two 42 is started and the electromagnetic valve 45 is opened. When the step motor two 42 is started, the feeding screw 44 is rotated, so that the cleaning liquid in the shell 17 and the scale residue are discharged through the electromagnetic valve 45, and the cleaning and residue discharge operation of the lean oil heat exchanger is completed.

[0045] The above shows only the preferred specific embodiments of the present application, but the protection scope of the present application is not limited thereto, any person skilled in the art can make equivalent replacement or change according to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. A slag removal and cleaning device for a lean oil heat exchanger, comprising a tube box (1), characterized in that, One end of the pipe box (1) is fixedly connected to the housing (17) by bolts, and the other end of the housing (17) is fixedly connected to the floating head cover (172) by welding. An ultrasonic cleaning mechanism (2) is provided above the housing (17). The ultrasonic cleaning mechanism (2) includes a top plate (21), and the top plate (21) is fixed to the housing (17) by welding. The floating head cover (172) is equipped with a rotating cleaning mechanism (3) inside. The rotating cleaning mechanism (3) includes a fixed sleeve (31). The fixed sleeve (31) is fixedly connected to the floating head cover (172) by bolts. The shell (17) is also equipped with a slag discharge mechanism (4) below. The slag discharge mechanism (4) includes a slag discharge box (41). The slag discharge box (41) is fixedly connected to the shell (17) and communicates internally. The shell (17) is also equipped with a control panel (5) fixedly installed on the outside by bolts.

2. The slag removal and cleaning device for a lean oil heat exchanger according to claim 1, characterized in that, On the other side of the tube box (1), there is a fixedly connected floating head tube plate (14). A fixedly connected liquid inlet flange (11) is provided on the top of the tube box (1). A fixedly connected liquid outlet flange (16) is provided at the bottom of the tube box (1). Real-time temperature sensors are installed inside both the liquid inlet flange (11) and the liquid outlet flange (16). A fixedly connected heat transfer tube (15) is provided at one end of the floating head tube plate (14). A liquid mass flow meter is also installed inside the liquid inlet flange (11).

3. The slag removal and cleaning device for a lean oil heat exchanger according to claim 1, characterized in that, Symmetrically distributed support frames (171) are fixedly installed on the lower part of the housing (17) by bolts. A liquid inlet flange (18) is fixedly connected and internally connected to the upper part of the housing (17) near the pipe box (1). A liquid outlet flange (19) is fixedly connected and internally connected to the lower part of the other end of the housing (17). Real-time temperature sensors are also installed inside the liquid inlet flange (18) and the liquid outlet flange (19). A liquid mass flow meter is also installed inside the liquid inlet flange (18).

4. The slag removal and cleaning device for a lean oil heat exchanger according to claim 1, characterized in that, Six transducers (22) arranged in an array are fixedly installed above the top plate (21). Amplifier rods (23) are fixedly connected to the bottom of the transducers (22) by bolts. A top frame (24) is also fixedly connected above the top plate (21). Two ultrasonic generators (25) are symmetrically distributed and fixedly installed above the top frame (24) by bolts. The ultrasonic generators (25) are electrically connected to the transducers (22).

5. The slag removal and cleaning device for a lean oil heat exchanger according to claim 1, characterized in that, The fixed sleeve (31) located inside the housing (17) has four axially distributed slots on its outer side. The fixed sleeve (31) has an inner sleeve (32) rotatably connected to it. The inner sleeve (32) has four rows of axially distributed water spray holes (33) on its outer side. One end of the inner sleeve (32) passes through the second floating head cover (172) and is fixedly connected to a spur gear (34). One end of the water spray hole (33) is fixedly connected to a rotary joint (35) through a flange. The fixed sleeve (31) is also fixedly connected to an extension frame (36). One side of the extension frame (36) is fixedly connected to a stepper motor (37) by bolts. The drive shaft of the stepper motor (37) passes through the extension frame (36) and is fixedly connected to a spur gear (38). The spur gear (38) meshes with the spur gear (34).

6. The slag removal and cleaning device for a lean oil heat exchanger according to claim 3, characterized in that, The slag discharge box (41) is equipped with a rotatably connected feeding auger (44) inside. A stepper motor (42) is fixedly installed on one side of the support frame (171) by bolts. The drive shaft of the stepper motor (42) is rotatably connected to the shaft at one end of the feeding auger (44) through a pulley assembly (43). A solenoid valve (45) is fixedly connected to one end of the slag discharge box (41).

7. The slag removal and cleaning device for a lean oil heat exchanger according to claim 1, characterized in that, The control panel (5), together with the real-time temperature sensor installed in the inlet flange 1 (11), the outlet flange 1 (16), the inlet flange 2 (18), and the outlet flange 2 (19), and the liquid mass flow meter installed in the inlet flange 1 (11) and the inlet flange 2 (18), constitute a scale thickness monitoring system. The real-time temperature sensor is used to collect the inlet and outlet temperatures of each liquid inlet and outlet end, and record them as T1, T2, t1, t2 respectively. The liquid mass flow meter records the liquid flow rate of each liquid inlet end within 5 seconds and records it as M1 and M2 respectively. The data of T1, T2, t1, t2 and M1, M2 within 5 seconds are sent to the control panel (5) for analysis. The control panel (5) calculates the heat transfer Q1 and Q2 after the lean oil and coolant exchange heat through the formula. When Q1 = Q2 or the difference between the two is small, it indicates that the real-time temperature sensor and liquid mass flow meter in the device are operating normally. The calculated Q1 or Q2 value is compared with QM. When Q1 or Q2 / QM > 0.8, no action is required. When Q1 or Q2 / QM < 0.8, the ultrasonic cleaning mechanism (2), the rotary cleaning mechanism (3) and the slag removal mechanism (4) are started to perform slag removal and cleaning operations. If the difference between Q1 and Q2 is large, it indicates that the real-time temperature sensor and liquid mass flow meter are damaged or that the coolant and lean oil are leaking.

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