Electric heating molten salt furnace and using method thereof

Abstract

The invention discloses an electric heating molten salt furnace and a using method thereof.The electric heating molten salt furnace comprises a molten salt furnace body, one side of the top of the molten salt furnace body is connected with a salt adding opening in a penetrating mode, an electric heating rod is arranged on the lower portion of the interior of the molten salt furnace body, and a wiring end is arranged on one side of the electric heating rod; the molten salt furnace further comprises a molten salt circulating pump fixedly installed on the other side of the top of the molten salt furnace body, the molten salt circulating pump communicates with the molten salt furnace body through a pipeline, a molten salt discharging pipe is connected to the side, located on the molten salt circulating pump, of the top of the molten salt furnace body in a penetrating mode, and dredging assemblies are arranged inside and outside the molten salt discharging pipe. The dredging assembly comprises fixing frames symmetrically installed above the outer side of the fused salt discharging pipe. The molten salt discharging pipe can be dredged in time when the molten salt is discharged through the molten salt discharging pipe and the molten salt discharging pipe is blocked, so that the molten salt discharging pipe is prevented from being blocked, the influence on subsequent discharging is avoided, and the practicability is improved.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of molten salt furnaces, in particular to an electric heating molten salt furnace and a use method thereof. BACKGROUND

[0002] The molten salt furnace is a thermal equipment using high-temperature molten salt as a working medium, which heats the molten salt to a high-temperature state, and then transfers the heat energy of the molten salt to an object to be heated, so as to realize object heating or process requirements.

[0003] Publication No. CN221444489U discloses an electric heating molten salt furnace. The electric heating molten salt furnace is provided with a steam heat tracing coil which is spirally wound on the outer wall of the cylinder. In other words, the electric heating molten salt furnace adopts an external overall uniform heating heat tracing structure. On the one hand, the temperature of the molten salt in the cylinder can be ensured to be higher than the melting point after the furnace is stopped, so as to avoid low-temperature molten salt from blocking the pipeline and solve the problem of automatic molten salt return after the furnace is stopped. On the other hand, the heat tracing can quickly raise the temperature, and there is no heat tracing blind area. However, the patent still has the following problems in actual use:

[0004] The molten salt after being heated can be discharged through the molten salt circulating pump. When the molten salt is discharged from the molten salt furnace after the molten salt furnace stops working, the temperature of the molten salt decreases. Then, after the molten salt is discharged through the discharge pipe, the molten salt is easily attached to the molten salt discharge pipe due to the decrease of the ambient temperature, which is not convenient for dredging the attached molten salt, and the molten salt is easily blocked in the discharge port during the discharging process.

[0005] The application provides an electric heating molten salt furnace and a use method thereof to solve the above problems. SUMMARY

[0006] The application aims to provide an electric heating molten salt furnace and a use method thereof to solve the above problems.

[0007] To achieve the above-mentioned purpose, the application provides the following technical scheme: an electric heating molten salt furnace and a use method thereof, comprising a molten salt furnace body.

[0008] A salt feeding port is connected to one side of the top of the molten salt furnace body, an electric heating rod is arranged below the inside of the molten salt furnace body, and a wiring end is arranged on one side of the electric heating rod.

[0009] Further comprising:

[0010] The other side of the top of the molten salt furnace body is fixedly installed with a molten salt circulating pump, and the molten salt circulating pump is communicated with the molten salt furnace body through a pipeline, and a molten salt discharge pipe is connected through one side of the top of the molten salt furnace body, and the inside and outside of the molten salt discharge pipe are provided with a dredging assembly;

[0011] The dredging assembly comprises fixed frames symmetrically installed above the outside of the molten salt discharge pipe, and a rotating shaft is rotatably connected between the two fixed frames.

[0012] One side of the fixed frame is fixedly installed with a servo motor, and the output end of the servo motor is fixedly connected with the rotating shaft through the fixed frame.

[0013] Preferably, the outside center of the rotating shaft is fixedly installed with a rotating disc, and two limiting frames are fixedly installed above the rotating shaft inside the molten salt discharge pipe, and an active rod is slidably connected inside the two limiting frames.

[0014] Preferably, the bottom of the active rod is fixedly installed with a T-shaped arc block, the outside of the rotating disc is provided with an annular groove, and the T-shaped arc block is slidably connected with the annular groove.

[0015] Preferably, a plurality of groups of support frames are symmetrically installed on the two sides of the outside of the active rod, two push plates are hingedly connected between each group of two support frames, a positioning block is fixedly installed below the active rod, and a limiting block is fixedly installed above the active rod.

[0016] Preferably, two groups of positioning frames are symmetrically installed above the two fixed frames outside the molten salt discharge pipe, a rotating rod is rotatably connected inside each group of two positioning frames, a first bevel gear is fixedly installed at the bottom end of the rotating rod through the lower positioning frame, a second bevel gear is fixedly installed on one side of the two first bevel gears outside the rotating shaft, and the second bevel gear is meshingly connected with the first bevel gear.

[0017] Preferably, a fixed ring is symmetrically installed on the outside of each of the two rotating rods, two groups of mounting frames are circumferentially and symmetrically installed on the outside of the fixed ring, a sliding rod is slidably connected inside the mounting frame, and a knocking block is fixedly installed at one end of the sliding rod.

[0018] Preferably, a telescopic spring is sleeved on one side of the outside of the sliding rod, one end of the telescopic spring is fixedly connected with the mounting frame, the other end of the telescopic spring is fixedly installed with a connecting block, and the connecting block is fixedly connected with the sliding rod.

[0019] Preferably, a method for using an electric heating molten salt furnace comprises the following steps:

[0020] S1, intelligent preheating and molten salt activation: add molten salt raw materials into the molten salt furnace body through the salt adding port, start the electric heating rod and activate the adaptive heating mode, automatically adjust the heating power according to the type of molten salt, make the molten salt temperature rise to 320-350℃ at a rate of 20-30℃ / min, and at the same time, the molten salt circulating pump is used to perform internal circulation at a flow rate of 3-5m 3 / h;

[0021] S2, dual-mode discharge control: after the molten salt is completely melted, switch to two discharge modes, which are:

[0022] Normal mode: the molten salt circulating pump flow is stabilized at 6-8m 3 / h, and the electric heating rod is controlled by PLC to maintain the temperature of the molten salt discharge pipe inlet at 300±10℃;

[0023] Energy-saving mode: when the discharge volume is less than 1m 3 / h, start the pipe heating system, radiate and heat the outer wall of the discharge pipe through the residual heat of the molten salt furnace body, and maintain the temperature in the pipe ≥280℃;

[0024] S3, composite dredging linkage: when the temperature difference detected by the temperature sensor in the molten salt discharge pipe exceeds 15℃ or the flow fluctuation is >10%, the servo motor drives the rotating shaft to rotate at a variable speed of 12-18r / min, the rotating disc makes the movable rod produce asymmetric reciprocating motion through the eccentrically designed annular groove, and the specific speed is 100mm / s, the push plate vertically pushes the molten salt, and the specific speed is 150mm / s, the push plate is inclined at an angle of 20-25°;

[0025] Synchronous start pulse knocking mode: the rotating shaft drives the rotating rod through the bevel gear set, the knocking block outside the fixed ring knocks 3 times at high intensity every 10 seconds, and the compression amount of the extension spring is dynamically adjusted to 8-10mm, which is matched with the piezoelectric ceramic sensor feedback of the pipe outer wall;

[0026] S4, waste heat recovery and intelligent insulation: after the discharge is completed, the electric heating rod is switched to pulse heating mode, and at the same time, the molten salt circulating pump guides the high-temperature molten salt in the molten salt furnace body into the discharge pipe for heat replacement, so that the pipe temperature is maintained at 220-240℃; when the system detects that the shutdown is more than 2 hours, the nano thermal insulation layer is automatically started.

[0027] Preferably, in S3, the dredging assembly adopts a temperature and pressure double threshold triggering mechanism: when the temperature in the molten salt discharge pipe is <260℃ and the pressure in the pipe is >0.35MPa, the servo motor is automatically switched to 20-25r / min, and the nano coating on the surface of the push plate cooperates with the wear-resistant layer of the T-shaped arc block.

[0028] Preferably, in S4, the knocking block integrates a piezoelectric power generation unit, and the mechanical energy generated when knocking the pipeline is converted into electric energy by the piezoelectric ceramic sheet to power the miniature heating wire on the outer wall of the pipeline, forming a self-sustaining system of knocking, power generation and heat tracing; at the same time, the extension spring is made of NiTi alloy, and when the ambient temperature is <15℃, the spring stiffness automatically increases by 20%.

[0029] Compared with the prior art, the electric heating molten salt furnace has the beneficial effects that when the molten salt causes the molten salt discharge pipe to be blocked during discharge through the molten salt discharge pipe, the molten salt discharge pipe can be promptly dredged, the molten salt discharge pipe is prevented from being blocked, subsequent discharge is prevented from being affected, and the practicability is improved.

[0030] 1. The raw materials are put into the molten salt furnace body through the salt adding port, heated by the electric heating rod, and then the molten salt can be extracted by the molten salt circulating pump, the molten salt enters the molten salt discharge pipe under the action of the molten salt circulating pump, and the discharge of the molten salt is realized. When the molten salt is attached to the molten salt discharge pipe due to the decrease of the ambient temperature during the molten salt discharge process, the servo motor can be started to drive the rotating shaft to rotate, so that the rotating disc can be biased and rotated. The rotating disc can drive the movable rod to move up and down through the sliding connection of the annular groove and the T-shaped arc block after the rotating disc rotates. The push plate is tightly attached to the positioning block during the upward movement of the movable rod due to the resistance of the molten salt. The push plate is perpendicular to the movable rod during the upward movement of the movable rod, so that the push plate can push the molten salt, preventing the molten salt from being attached. When the push plate moves downward and is resisted by the molten salt, the push plate can slide on the support frame, so that the push plate can be inclined during the downward movement of the movable rod to reduce the resistance of the movable rod, and the reciprocating movement of the movable rod can continuously dredge the blocked molten salt through the push plate, so that when the molten salt causes the molten salt discharge pipe to be blocked during discharge through the molten salt discharge pipe, the molten salt discharge pipe can be promptly dredged, the molten salt discharge pipe is prevented from being blocked, subsequent discharge is prevented from being affected, and the practicability is improved.

[0031] 2. While dredging the molten salt, the rotating shaft can drive the two rotating rods to rotate through the meshing of the first bevel gear and the second bevel gear, the rotating rods can drive the fixed ring to rotate after the rotating rods rotate, and the fixed ring can make the two groups of sliding rods rotate circumferentially while rotating, so that the knocking block can continuously knock the outside of the molten salt discharge pipe during the circumferential rotation of the sliding rod, the sliding rod can slide on the mounting frame and stretch the extension spring during the knocking process of the knocking block, and the two groups of knocking blocks can continuously knock the molten salt discharge pipe through the continuous rotation of the rotating rods, so that the molten salt discharge pipe vibrates, preventing the molten salt from being attached to the molten salt discharge pipe, and improving the practicability. BRIEF DESCRIPTION OF DRAWINGS

[0032] Figure 1The schematic diagram of the body structure of the molten salt furnace of the present application;

[0033] Figure 2 The schematic diagram of the local structure of the molten salt discharge pipe of the present application;

[0034] Figure 3 The schematic diagram of the local sectional structure of the molten salt discharge pipe of the present application;

[0035] Figure 4 The schematic diagram of the rotating disc structure of the present application;

[0036] Figure 5 The schematic diagram of the A area of the present application; Figure 3

[0037] Figure 6 The schematic diagram of the fixed ring structure of the present application.

[0038] In the figure: 1, the body of the molten salt furnace; 101, the salt feeding port; 102, the electric heating rod; 103, the wiring end; 104, the molten salt circulating pump; 105, the molten salt discharge pipe; 2, the dredging assembly; 201, the fixed frame; 202, the servo motor; 203, the rotating shaft; 204, the rotating disc; 205, the limiting frame; 206, the movable rod; 207, the T-shaped arc block; 208, the annular groove; 209, the support frame; 210, the push plate; 211, the positioning block; 212, the limiting block; 213, the positioning frame; 214, the rotating rod; 215, the first bevel gear; 216, the second bevel gear; 217, the fixed ring; 218, the mounting frame; 219, the sliding rod; 220, the extension spring; 221, the connecting block; 222, the knocking block. DETAILED DESCRIPTION

[0039] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0040] Please refer to Figures 1-5 ​The application provides the technical scheme: an electric heating molten salt furnace, comprising a molten salt furnace body 1, a salt feeding opening 101 is connected through one side of the top of the molten salt furnace body 1, an electric heating rod 102 is arranged below the inside of the molten salt furnace body 1, and a wiring end 103 is arranged on one side of the electric heating rod 102, further comprising: a molten salt circulating pump 104 is fixedly installed on the other side of the top of the molten salt furnace body 1, the molten salt circulating pump 104 is communicated with the molten salt furnace body 1 through a pipeline, a molten salt discharging pipe 105 is connected through one side of the top of the molten salt furnace body 1 located on one side of the molten salt circulating pump 104, and a dredging assembly 2 is arranged in the inside and outside of the molten salt discharging pipe 105, wherein the dredging assembly 2 comprises a fixed frame 201 symmetrically installed above the outside of the molten salt discharging pipe 105, and a rotating shaft 203 is rotatably connected between the two fixed frames 201, one side of the one side fixed frame 201 is fixedly installed with a servo motor 202, and the output end of the servo motor 202 is fixedly connected with the rotating shaft 203 through the one side fixed frame 201, so that when the molten salt is discharged through the molten salt discharging pipe 105, the molten salt discharging pipe 105 can be dredged in time when the molten salt discharging pipe 105 is blocked, the molten salt discharging pipe 105 is prevented from being blocked, the subsequent discharging is prevented from being affected, and the practicability is improved.

[0041] The outer center of the rotating shaft 203 is fixedly installed with a rotating disc 204, two limiting racks 205 are fixedly installed inside the molten salt discharge pipe 105 located above the rotating shaft 203, and the interiors of the two limiting racks 205 are slidably connected with movable rods 206, the movement of the movable rods 206 is limited, the bottom of the movable rod 206 is fixedly installed with a T-shaped arc block 207, the outer side of the rotating disc 204 is provided with an annular groove 208, and the T-shaped arc block 207 is slidably connected with the annular groove 208, so that the rotation of the rotating disc 204 can drive the movable rod 206 to move up and down reciprocatingly, a plurality of groups of supporting racks 209 are symmetrically installed on the outer sides of the movable rods 206, a push plate 210 is hingedly connected between every two supporting racks 209, a positioning block 211 is fixedly installed below the push plate 210, and a limiting block 212 is fixedly installed above the push plate 210, so that the push plate 210 can dredge the molten salt discharge pipe 105, two groups of positioning racks 213 are symmetrically installed outside the molten salt discharge pipe 105 located above the two fixed racks 201, rotating rods 214 are rotatably arranged in the interiors of the two positioning racks 213 of each group, the bottom end of the rotating rod 214 penetrates through the lower positioning rack 213 and is fixedly installed with a first bevel gear 215, second bevel gears 216 are fixedly installed on one side of the rotating shaft 203 outside the two first bevel gears 215, the second bevel gears 216 are meshingly connected with the first bevel gears 215, so that the rotation of the rotating shaft 203 can drive the rotating rod 214 to rotate, fixed rings 217 are symmetrically installed on the outer sides of the two rotating rods 214, two groups of mounting racks 218 are symmetrically installed on the outer sides of the fixed rings 217 in the circumferential direction, sliding rods 219 are slidably connected in the interiors of the mounting racks 218, knocking blocks 222 are fixedly installed at one end of the sliding rods 219, so that the rotation of the rotating rod 214 can knock the molten salt discharge pipe 105, telescopic springs 220 are sleeved on one side of the outer side of the sliding rod 219, one end of the telescopic spring 220 is fixedly connected with the mounting rack 218, the other end of the telescopic spring 220 is fixedly installed with a connecting block 221, and the connecting block 221 is fixedly connected with the sliding rod 219, so that the sliding rod 219 can be automatically reset after moving.

[0042] The application further discloses a use method of the electric heating molten salt furnace.

[0043] S1, intelligent preheating and molten salt activation: molten salt raw materials are added into the molten salt furnace body 1 through the salt adding port 101, the electric heating rod 102 is started and the self-adaptive heating mode is activated, the system automatically adjusts the heating power according to the molten salt type (such as a potassium nitrate-sodium nitrite mixture), the molten salt temperature is raised to 320-350 DEG C at a rate of 20-30 DEG C / min, meanwhile, the molten salt circulating pump 104 is started to circulate the molten salt in the molten salt furnace body 1 at a flow rate of 3-5 m 3The molten salt is activated by the turbulent flow effect, and the preheating time is shortened to 40-60 min.

[0044] S2, bimodal discharge control: after the molten salt is completely melted, switch to the discharge mode:

[0045] Normal mode: the molten salt circulating pump 104 is stable at 6-8 m 3 / h, and the temperature at the inlet of the molten salt discharge pipe 105 is maintained at 300±10°C by the PLC-controlled electric heating rod 102;

[0046] Energy-saving mode: when the discharge amount is less than 1 m 3 / h, the pipeline heating system is started, and the outer wall of the discharge pipe is radiantly heated by the waste heat of the molten salt furnace body 1 to maintain the temperature in the pipe ≥280°C.

[0047] S3, composite dredging linkage:

[0048] When the temperature difference detected by the temperature sensor in the molten salt discharge pipe 105 exceeds 15°C or the flow fluctuation is >10%, the servo motor 202 drives the rotating shaft 203 to rotate at a variable speed of 12-18 r / min, and the rotating disc 204 makes the movable rod 206 produce asymmetric reciprocating motion through the eccentric design of the annular groove 208 - the upward speed is 100 mm / s (the push plate 210 vertically pushes the molten salt), and the downward speed is 150 mm / s (the push plate is inclined at an angle of 20-25° to reduce resistance), and the dredging frequency is 30-40 times / min;

[0049] Synchronous start pulse knocking mode: the rotating shaft 203 drives the rotating rod 214 to rotate at a speed of 10 r / min through the bevel gear set, and the knocking block 222 outside the fixed ring 217 adopts the "intermittent heavy hitting" strategy - 3 times of high-intensity knocking every 10 seconds (knocking force 5-8 N), and the compression amount of the extension spring 220 is dynamically adjusted to 8-10 mm, which is matched with the piezoelectric ceramic sensor feedback of the pipeline outer wall to realize the closed-loop control of "block positioning-precise knocking".

[0050] S4, waste heat recovery and intelligent heat preservation: after the discharge is completed, the electric heating rod 102 is switched to pulse heating mode (power 20-30%), and at the same time, the molten salt circulating pump 104 introduces the high-temperature molten salt in the molten salt furnace body 1 into the discharge pipe 105 at a flow rate of 1 m 3 / h to perform hot replacement, so that the pipeline temperature is maintained at 220-240°C; when the system detects that the shutdown is more than 2 hours, the nano thermal insulation layer (attached to the inner wall of the discharge pipe, thickness 0.5 mm) is automatically started, and the heat loss rate is reduced to ≤5%.

[0051] In S3, the dredging assembly 2 adopts a "temperature-pressure" double threshold trigger mechanism: when the temperature in the molten salt discharge pipe 105 is <260℃ and the pressure in the pipe is >0.35MPa, the servo motor 202 automatically switches to high speed (20-25r / min), the nano coating (thickness 10μm, friction coefficient ≤0.1) on the surface of the push plate 210 cooperates with the wear-resistant layer (tungsten carbide plating, hardness HV1200) of the T-shaped cam block 207, and 2000 cycles of dredging are achieved without significant wear.

[0052] In S4, the knocking block 222 integrates a piezoelectric power generation unit, and the mechanical energy generated when knocking the pipeline is converted into electrical energy (power 5-8mW) by the piezoelectric ceramic sheet, which powers the miniature heating wire (power 3W) on the outer wall of the pipeline, forming a "knocking-power generation-companion heating" self-sustaining system; at the same time, the extension spring 220 is made of shape memory alloy material (NiTi alloy), and when the environmental temperature is <15℃, the spring stiffness automatically increases by 20%, ensuring the stability of the knocking force in low temperature environment.

[0053] Working principle: Before using the electric heating molten salt furnace, the overall situation of the device needs to be checked to ensure that it can work normally. According to the Figure 1 Figure 5 As shown, the raw materials are put into the molten salt furnace body 1 through the salt inlet 101, heated by the electric heating rod 102, and then the molten salt can be extracted by the molten salt circulating pump 104. The molten salt enters the molten salt discharge pipe 105 under the action of the molten salt circulating pump 104, realizing the discharge of the molten salt. During the molten salt discharge process, if the surrounding environment temperature drops and the molten salt adheres to the molten salt discharge pipe 105, the servo motor 202 can be started to drive the rotating shaft 203 to rotate, so that the rotating disc 204 can be driven to offset and rotate. After the rotating disc 204 rotates, the sliding connection between the annular groove 208 and the T-shaped cam block 207 can drive the movable rod 206 to move up and down reciprocatingly. During the upward movement of the movable rod 206, the push plate 210 tightly adheres to the positioning block 211 due to the resistance of the molten salt. During the upward movement of the movable rod 206, the push plate 210 is perpendicular to the movable rod 206, so that the push plate 210 can push the molten salt to avoid adhesion. When the movable rod 206 descends, the push plate 210 can slide on the support frame 209 if it moves downward due to the resistance of the molten salt, so that the push plate 210 can be inclined during the downward movement of the movable rod 206 to reduce the resistance of the movable rod 206. Through the reciprocating movement of the movable rod 206, the push plate 210 can continuously dredge the blocked molten salt, so that when the molten salt discharge pipe 105 is blocked during the discharge of the molten salt through the molten salt discharge pipe 105, the molten salt discharge pipe 105 can be dredged in time to avoid blocking the molten salt discharge pipe 105 and affecting the subsequent discharge, thereby improving the practicability.

[0054] ​While dredging the molten salt, the rotating shaft 203 rotates to drive the two rotating rods 214 through the meshing of the first bevel gear 215 and the second bevel gear 216, the rotating rods 214 rotate to drive the fixed ring 217 to rotate, the fixed ring 217 rotates to drive the two groups of sliding rods 219 to rotate circumferentially, the sliding rods 219 rotate circumferentially to make the knocking blocks 222 continuously knock the outside of the molten salt discharge pipe 105, the knocking blocks 222 knock to make the sliding rods 219 slide on the mounting frame 218 and stretch the extension springs 220, and then the continuous rotation of the rotating rods 214 can make the two groups of knocking blocks 222 continuously knock the molten salt discharge pipe 105 to vibrate, preventing the molten salt from adhering to the molten salt discharge pipe 105, and improving the practicability.

[0055] Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art will appreciate that modifications can be made to the technical solutions described in the foregoing embodiments, or equivalent replacements can be made to some of the technical features, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. An electrically heated molten salt furnace, comprising a molten salt furnace body (1); A salt adding port (101) is connected through one side of the top of the molten salt furnace body (1), an electric heating rod (102) is provided at the lower part of the interior of the molten salt furnace body (1), and a terminal (103) is provided on one side of the electric heating rod (102); It is characterized by: Also includes: A molten salt circulation pump (104) is fixedly installed on the other side of the top of the molten salt furnace body (1), and the molten salt circulation pump (104) is connected to the molten salt furnace body (1) through a pipeline, and a molten salt discharge pipe (105) is connected through the top of the molten salt furnace body (1) on one side of the molten salt circulation pump (104), and a dredging component (2) is provided inside and outside the molten salt discharge pipe (105); The dredging assembly (2) comprises a fixing frame (201) symmetrically mounted above the outer side of the molten salt discharge pipe (105), and a rotating shaft (203) is rotatably connected between the two fixing frames (201); A servo motor (202) is fixedly mounted on one side of the fixing frame (201), and an output end of the servo motor (202) passes through the fixing frame (201) and is fixedly connected to the rotating shaft (203).

2. The electrically heated molten salt furnace according to claim 1, wherein: A turntable (204) is fixedly installed at the outer center of the rotating shaft (203), and two limiting frames (205) are fixedly installed above the rotating shaft (203) inside the molten salt discharge pipe (105), and movable rods (206) are slidably connected inside the two limiting frames (205).

3. The electrically heated molten salt furnace according to claim 2, characterized in that: A T-shaped arc block (207) is fixedly installed on the bottom of the movable rod (206), and an annular groove (208) is opened on the outer side of the rotating disk (204), and the T-shaped arc block (207) is slidably connected to the annular groove (208).

4. The electrically heated molten salt furnace according to claim 2, wherein: A plurality of groups of support frames (209) are symmetrically installed on both sides of the outer portion of the movable rod (206), and a push plate (210) is hinged between each group of two support frames (209), and a positioning block (211) is fixedly installed below the movable rod (206) and a limiting block (212) is fixedly installed above the movable rod (206) and the push plate (210).

5. The electrically heated molten salt furnace according to claim 1, characterized in that: The outside of the molten salt discharge pipe (105) is symmetrically installed with two groups of positioning frames (213) above the two fixing frames (201), and a rotating rod (214) is rotated inside each group of two positioning frames (213), and the bottom end of the rotating rod (214) passes through the lower positioning frame (213) and is fixedly installed with a first bevel gear (215), and the outside of the rotating shaft (203) is fixedly installed on one side of the two first bevel gears (215), and the second bevel gear (216) is meshed and connected with the first bevel gear (215).

6. The electrically heated molten salt furnace according to claim 5, characterized in that: The outsides of the two rotating rods (214) are both symmetrically mounted with fixing rings (217), and the outsides of the fixing rings (217) are symmetrically mounted with two sets of mounting frames (218), and the insides of the mounting frames (218) are slidably connected with sliding rods (219), and one end of the sliding rods (219) is fixedly mounted with a striking block (222).

7. The electrically heated molten salt furnace according to claim 6, characterized in that: A telescopic spring (220) is sleeved on one side of the outside of the sliding rod (219), and one end of the telescopic spring (220) is fixedly connected to the mounting frame (218), and a connecting block (221) is fixedly installed on the other end of the telescopic spring (220), and the connecting block (221) is fixedly connected to the sliding rod (219).

8. A method for using an electrically heated molten salt furnace, for operating the electrically heated molten salt furnace according to any one of claims 1 to 7, characterized in that: The following steps are involved: S1, intelligent preheating and molten salt activation: add molten salt raw materials into the molten salt furnace body (1) through the salt adding port (101), start the electric heating rod (102) and activate the adaptive heating mode, automatically adjust the heating power according to the type of molten salt, so that the molten salt temperature is raised to 320-350°C at a rate of 20-30°C / min, and at the same time, the molten salt circulation pump (104) is used to heat the molten salt at a rate of 3-5m 3 / h flow rate for internal circulation; S2, dual-mode discharge control: After the molten salt is completely melted, it switches to two discharge modes: Normal mode: The flow rate of the molten salt circulation pump (104) is stable at 6-8m 3 / h, and the electric heating rod (102) is controlled by PLC to maintain the inlet temperature of the molten salt discharge pipe (105) at 300±10°C; Energy saving mode: when the discharge volume is less than 1m 3 / h, start the pipeline heating system, and use the residual heat of the molten salt furnace body (1) to radiate heat to the outer wall of the discharge pipe to maintain the temperature inside the pipe ≥280°C; S3, compound dredging linkage: when the temperature sensor in the molten salt discharge pipe (105) detects that the temperature difference exceeds 15°C or the flow fluctuation is greater than 10%, the servo motor (202) drives the rotating shaft (203) to rotate at a variable speed of 12-18 r / min, and the turntable (204) causes the movable rod (206) to produce an asymmetric reciprocating motion through the eccentrically designed annular groove (208), specifically: the upward movement speed is 100 mm / s, and the push plate (210) pushes the molten salt vertically, and the downward movement speed is 150 mm / s, and the push plate (210) has an inclination angle of 20-25°; Synchronous start pulse knocking mode: the rotating shaft (203) drives the rotating rod (214) to rotate through the bevel gear set, the knocking block (222) outside the fixed ring (217) performs high-intensity knocking three times every 10 seconds, and the compression amount of the telescopic spring (220) is dynamically adjusted to 8-10mm, in conjunction with the piezoelectric ceramic sensor feedback on the outer wall of the pipeline; S4. Waste heat recovery and intelligent heat preservation: After the discharge is completed, the electric heating rod (102) switches to the pulse heating mode, and at the same time, the molten salt circulation pump (104) introduces the high-temperature molten salt in the molten salt furnace body (1) into the discharge pipe (105) for heat replacement, so that the pipe temperature is maintained at 220-240°C; when the system detects that the shutdown exceeds 2 hours, the nano heat insulation layer is automatically started.

9. The method for using an electrically heated molten salt furnace according to claim 8, wherein: In S3, the dredging component (2) adopts a temperature and pressure dual threshold trigger mechanism: when the temperature in the molten salt discharge pipe (105) is less than 260°C and the pressure in the pipe is greater than 0.35MPa, the servo motor (202) automatically switches to 20-25r / min, and the nano coating on the surface of the push plate (210) cooperates with the wear-resistant layer of the T-shaped arc block (207).

10. The method for using an electrically heated molten salt furnace according to claim 8, wherein: In S4, the striking block (222) is integrated with a piezoelectric power generation unit. The mechanical energy generated when striking the pipeline is converted into electrical energy through the piezoelectric ceramic sheet, which supplies power to the micro heating wire on the outer wall of the pipeline, forming a self-sustaining system for striking, power generation, and heating. At the same time, the telescopic spring (220) is made of NiTi alloy. When the ambient temperature is less than 15°C, the spring stiffness automatically increases by 20%.

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