TBP pyrolysis ash discharging system and method

Abstract

The invention discloses a TBP pyrolysis ash discharging system and method, and relates to the technical field of radioactive waste treatment, the system comprises an ash discharging hopper, a star valve, an expansion joint, a spiral conveyor, an ash discharging glove box, a vibrator, a holding positioning device, a discharging pipe, a first roller conveyor and a second roller conveyor, and the discharging pipe is provided with an ash barrel sealing joint and is a hose; the second roller conveyor is a roller conveyor with a weighing device, and the weighing value of the weighing device can be observed through an observation window of the ash discharging glove box; an electric shielding door is arranged on one side, opposite to the dust discharging hopper, of the dust discharging glove box; the second roller conveyor and the first roller conveyor are located on the inner side and the outer side of the electric shielding door respectively. When the electric shielding door is opened, the roller ways of the first roller way conveyor and the second roller way conveyor form an integral roller way so as to meet the requirement for back-and-forth conveying of the ash buckets. When the dust amount in the dust barrel is measured, the influence of dust raising is avoided, and the measurement is more accurate; and pyrolysis ash can be prevented from escaping to a factory area outside the glove box.

Description

Technical Field

[0001] The present invention relates to the technical field of radioactive waste treatment, and in particular to a TBP pyrolysis ash unloading system and method. Background Art

[0002] The traditional TBP pyrolysis ash unloading system includes an ash unloading hopper. The ash unloading port of the ash unloading hopper is provided with a star valve and is connected to the inlet of the screw conveyor through an expansion joint. The screw conveyor is arranged at an angle, and the outer wall of the screw conveyor is sealed with the outer wall of the glove box. The outlet of the screw conveyor extends into the ash unloading glove box and is connected to a discharge pipe with a vibrator. An ash outlet is provided at the bottom of the glove box, and the outlet of the discharge pipe extends downward to the ash outlet at the bottom of the glove box. During the ash unloading process, the ash bucket is fixed and positioned on the electric trolley by a clamping positioning device, and is transported to the bottom of the glove box by the electric trolley. The clamping positioning device is then released, and the ash bucket is lifted up by a lifting device. The ash bucket is provided with a hinged sealing cover. During the lifting process, the unlocking mechanism at the bottom of the glove box opens the seal of the ash bucket, and then the bucket mouth of the ash bucket is connected to the ash outlet at the bottom of the glove box. The outlet of the discharge pipe is operated through the gloves of the glove box through the ash bucket sealing joint (the sealing joint has two halves, one half has air holes and is provided at the outlet of the discharge pipe, and the other half has air holes and is provided at the outlet of the discharge pipe). The ash unloading device is semi-installed at the barrel mouth of the ash barrel. When unloading ash, the air hole is used to discharge the gas in the ash barrel and ensure that too much ash will not escape. The ash unloading device is connected to the barrel mouth of the ash barrel, and then the star valve is opened to start unloading ash. The screw conveyor conveys the pyrolysis ash to the unloading pipe. With the assistance of the vibrator, the pyrolysis ash falls into the ash barrel. The laser sensor is used to measure the height of the incineration ash in the ash barrel. When the ash unloading is completed, the connection between the unloading pipe and the ash barrel is disconnected, the sealing cover of the ash barrel is covered, and the ash barrel is fixed to the electric trolley with the clamping device and transported to other places.

[0003] Although the traditional TBP pyrolysis ash unloading system can also unload ash, it has the following disadvantages:

[0004] 1) When unloading ash, the incineration ash will escape in the barrel. The laser sensor cannot accurately measure the amount of ash unloading. When receiving the ash, it is often necessary to observe and fill it many times, which is inefficient;

[0005] 2) The ash barrel and the glove box are rigidly connected and the seal is not tight, which may cause the incineration ash to escape from the factory during the ash unloading process. Summary of the invention

[0006] The present invention provides a TBP pyrolysis ash unloading system and method, which can alleviate the above-mentioned problems.

[0007] In order to alleviate the above-mentioned problems, the technical solution adopted by the present invention is as follows:

[0008] In a first aspect, the present invention provides a TBP pyrolysis ash unloading system, comprising an ash unloading hopper, a star valve, an expansion joint, a screw conveyor, an ash unloading glove box, a vibrator, a clamping and positioning device for clamping and positioning an ash bucket, a discharge pipe with an ash bucket sealing joint at an ash outlet, a first roller conveyor, and a second roller conveyor;

[0009] There are two clamping and positioning devices, namely a first clamping and positioning device installed on the frame of the first roller conveyor, and a second clamping and positioning device installed on the frame of the second roller conveyor; the second roller conveyor is a roller conveyor with a built-in weighing device, and the weighing value of the weighing device can be observed through the observation window of the dust unloading glove box;

[0010] An electric shield door is arranged on the side of the ash unloading glove box facing away from the ash unloading hopper; the second roller conveyor is located directly below the discharge pipe in the ash unloading glove box; the second roller conveyor and the first roller conveyor are located on the inner and outer sides of the electric shield door respectively; when the electric shield door is opened, the rollers of the first roller conveyor and the second roller conveyor form an integral roller conveyor to meet the round-trip transportation of the ash bucket;

[0011] The discharge pipe is a flexible hose that can be completely connected.

[0012] In a preferred embodiment of the present invention, the dust unloading glove box has two observation windows, which are distributed on the front and rear sides of the dust unloading glove box; the glove operation hole of the dust unloading glove box is located on the front side of the dust unloading glove box and below the observation window.

[0013] In a preferred embodiment of the present invention, the second clamping and positioning device is installed in the middle section of the second roller conveyor, and the middle section of the second roller conveyor is located directly below the discharge pipe.

[0014] In a preferred embodiment of the present invention, the outer shell of the screw conveyor is sealed with the side of the ash unloading glove box facing the ash unloading hopper, and the screw conveyor is arranged in an inclined manner with a high inlet and a low outlet.

[0015] In a second aspect, the present invention provides a TBP pyrolysis ash unloading method, which adopts the TBP pyrolysis ash unloading system according to the first aspect of claim 1 and comprises the following steps:

[0016] Step 1: hoist the ash bucket with the bucket mouth open into the first roller conveyor, the first clamping and positioning device clamps and positions the ash bucket, and the first roller conveyor is started, and the first roller conveyor transports the ash bucket toward the electric screen door;

[0017] Step 2: When the ash bucket approaches the electric shielding door, the electric shielding door is opened, and the ash bucket enters the second roller conveyor after passing through the electric shielding door. The electric shielding door is closed, and the weighing device weighs the ash bucket. The operator lifts the discharge pipe through the glove operation hole to make the ash bucket smoothly reach the middle section of the second roller conveyor. Then the second clamping and positioning device is turned on to clamp and position the ash bucket;

[0018] Step 3: The operator uses the glove operation hole to seal the lower end of the discharge pipe with the ash bucket mouth through the ash bucket sealing joint;

[0019] Step 4: Open the star valve of the ash hopper, start the screw conveyor, and start the vibrator to start unloading ash into the ash bucket;

[0020] Step 5: When the weight of the ash bucket displayed by the weighing device reaches the required value, the ash unloading is completed, the star valve of the ash unloading hopper is closed, the screw conveyor and the vibrator are closed, the unloading pipe is operated through the glove operation hole, the ash bucket sealing joint of the unloading pipe is separated from the ash bucket, the unloading pipe is lifted, the sealing cover is put on the ash bucket, and the second roller conveyor transports the ash bucket in the reverse direction;

[0021] Step S6, when the ash bucket approaches the electric shielding door, the electric shielding door is opened, the ash bucket enters the first roller conveyor after passing through the electric shielding door, and the electric shielding door is closed.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] 1. The present invention uses a weighing device instead of a laser sensor to measure the amount of ash in the ash bucket, which is not affected by dust raising, has more accurate measurement, does not require additional multiple observations and filling, and has higher ash unloading efficiency;

[0024] 2. The entire process of filling the ash barrel with ash is carried out in a closed ash unloading glove box to prevent the pyrolysis ash from escaping to the factory area outside the glove box. The radioactive dose level in the ash unloading workplace is low, and the radiation dose to personnel is low.

[0025] 3. Set the discharge pipe as a hose so that the ash bucket can reach the ash unloading position smoothly, and it is also convenient to connect the discharge pipe and the ash bucket.

[0026] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the embodiments of the present invention are specifically cited below and described in detail with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0028] Figure 1 It is a schematic diagram of the appearance structure of the TBP pyrolysis ash unloading system of the present invention;

[0029] Figure 2 It is a structural schematic diagram of the first working process of the TBP pyrolysis ash unloading system of the present invention;

[0030] Figure 3 It is a structural schematic diagram of the second working process of the TBP pyrolysis ash unloading system of the present invention;

[0031] Figure 4 It is a schematic structural diagram of the third working process of the TBP pyrolysis ash unloading system of the present invention;

[0032] Figure 5 It is a schematic structural diagram of the fourth working process of the TBP pyrolysis ash unloading system of the present invention;

[0033] In the figure, 1-first roller conveyor; 2-second roller conveyor; 3-electric shield door; 4-ash unloading glove box; 5-screw conveyor; 6-vibrator; 7-discharging pipe; 8-ash unloading hopper; 9-star valve; 10-expansion joint; 11-glove operation hole; 12-observation window; 13-ash bucket sealing joint; 14-weighing device; 15-first clamping positioning device; 16-second clamping positioning device; 17-ash bucket. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments.

[0035] Example 1

[0036] Please refer to Figure 1 to Figure 5 The present embodiment provides a TBP pyrolysis ash unloading system, including an ash unloading hopper 8, a star valve 9, an expansion joint 10, a screw conveyor 5, an ash unloading glove box 4, a vibrator 6, a clamping and positioning device for clamping and positioning an ash bucket 17, a discharge pipe 7 with an ash bucket sealing joint 13 and a hose structure at the ash outlet, a first roller conveyor 1 and a second roller conveyor 2.

[0037] There are two clamping positioning devices, namely a first clamping positioning device 15 installed on the frame of the first roller conveyor 1, and a second clamping positioning device 16 installed on the frame of the second roller conveyor 2. The second clamping positioning device 16 is installed in the middle section of the second roller conveyor 2, and the middle section of the second roller conveyor 2 is located directly below the discharge pipe 7.

[0038] The second roller conveyor 2 is a roller conveyor with a weighing device 14. The weighing value of the weighing device 14 can be observed through the observation window 12 of the dust unloading glove box 4. The dust unloading glove box 4 has two observation windows 12, which are distributed on the front and rear sides of the dust unloading glove box 4; the glove operation hole 11 of the dust unloading glove box 4 is located on the front side of the dust unloading glove box 4 and below the observation window 12. Figure 1 shown.

[0039] An electric shield door 3 is arranged on the side of the ash unloading glove box 4 facing away from the ash unloading hopper 8; the second roller conveyor 2 is located directly below the discharge pipe 7 in the ash unloading glove box 4; the second roller conveyor 2 and the first roller conveyor 1 are respectively located on the inside and outside sides of the electric shield door 3; when the electric shield door 3 is opened, the rollers of the first roller conveyor 1 and the second roller conveyor 2 form an integral roller conveyor to meet the round-trip transportation of the ash bucket 17.

[0040] The roller conveyor with weighing device 14 is a prior art and will not be described in detail here. The gap width requirements between the two roller conveyors are: 1) sufficient to install the electric screen door 3; 2) sufficient to allow the ash bucket 17 on the first roller conveyor 1 to pass through the gap and be transported to the second roller conveyor 2 after the electric screen door 3 is opened.

[0041] Example 2

[0042] This embodiment provides a TBP pyrolysis ash unloading method, which adopts the TBP pyrolysis ash unloading system described in Example 1 and includes the following steps:

[0043] Step 1: Figure 2 As shown, the ash bucket 17 with the bucket mouth opened is hoisted into the first roller conveyor 1, the first clamping and positioning device 15 clamps and positions the ash bucket 17, and the first roller conveyor 1 is started, and the first roller conveyor 1 transports the ash bucket 17 toward the electric screen door 3;

[0044] Step 2: Figure 3 As shown, when the ash bucket 17 approaches the electric shielding door 3, the electric shielding door 3 is opened, and the ash bucket 17 enters the second roller conveyor 2 after passing through the electric shielding door 3, and the electric shielding door 3 is closed. The weighing device 14 weighs the ash bucket 17, and the operator lifts the discharge pipe 7 through the glove operation hole 11, so that the ash bucket 17 smoothly reaches the middle section of the second roller conveyor 2, and then the second clamping and positioning device 16 is opened to clamp and position the ash bucket 17;

[0045] Step 3: Figure 4 As shown, the operator uses the glove operation hole 11 to seal the lower end of the discharge pipe 7 with the barrel opening of the ash barrel 17 through the ash barrel sealing joint 13;

[0046] Step 4, open the star valve 9 of the ash discharge hopper 8, start the screw conveyor 5, start the vibrator 6 to start discharging ash into the ash bucket 17;

[0047] Step 5: When the weight of the ash bucket 17 displayed by the weighing device 14 reaches 85 kg, the ash unloading is completed, the star valve 9 of the ash unloading hopper 8 is closed, the screw conveyor 5 and the vibrator 6 are closed, the unloading pipe 7 is operated through the glove operation hole 11, the ash bucket sealing joint 13 of the unloading pipe 7 is separated from the ash bucket 17, the unloading pipe 7 is lifted, the sealing cover is covered on the ash bucket 17, and the second roller conveyor 2 transports the ash bucket 17 in the reverse direction, see Figure 5 As shown;

[0048] Step S6, when the ash bucket 17 approaches the electric shielding door 3, the electric shielding door 3 is opened, the ash bucket 17 passes through the electric shielding door 3 and enters the first roller conveyor 1, and the electric shielding door 3 is closed.

[0049] In this embodiment, the actual weight of the ash bucket 17 is 84.95 kg. During the ash unloading process, by monitoring the ash unloading glove box 4 and its surrounding environment, the surface dose rate level is 1.85 μSv / h, the space dose rate level is 1.15 μSv / h, and there is no surface contamination on the ground, the surface of the ash unloading glove box 4, and the roller table. The shielding and sealing effects can effectively ensure the radiation safety of the operators.

[0050] Example 3

[0051] This embodiment provides a TBP pyrolysis ash unloading method, which adopts the TBP pyrolysis ash unloading system described in Example 1 and includes the following steps:

[0052] Step 1: Figure 2 As shown, the ash bucket 17 with the bucket mouth opened is hoisted into the first roller conveyor 1, the first clamping and positioning device 15 clamps and positions the ash bucket 17, and the first roller conveyor 1 is started, and the first roller conveyor 1 transports the ash bucket 17 toward the electric screen door 3;

[0053] Step 2: Figure 3 As shown, when the ash bucket 17 approaches the electric shielding door 3, the electric shielding door 3 is opened, and the ash bucket 17 enters the second roller conveyor 2 after passing through the electric shielding door 3, and the electric shielding door 3 is closed. The weighing device 14 weighs the ash bucket 17, and the operator lifts the discharge pipe 7 through the glove operation hole 11, so that the ash bucket 17 smoothly reaches the middle section of the second roller conveyor 2, and then the second clamping and positioning device 16 is opened to clamp and position the ash bucket 17;

[0054] Step 3: Figure 4 As shown, the operator uses the glove operation hole 11 to seal the lower end of the discharge pipe 7 with the barrel opening of the ash barrel 17 through the ash barrel sealing joint 13;

[0055] Step 4, open the star valve 9 of the ash discharge hopper 8, start the screw conveyor 5, start the vibrator 6 to start discharging ash into the ash bucket 17;

[0056] Step 5: When the weight of the ash bucket 17 displayed by the weighing device 14 reaches 90 kg, the ash unloading is completed, the star valve 9 of the ash unloading hopper 8 is closed, the screw conveyor 5 and the vibrator 6 are closed, the unloading pipe 7 is operated through the glove operation hole 11, the ash bucket sealing joint 13 of the unloading pipe 7 is separated from the ash bucket 17, the unloading pipe 7 is lifted, the sealing cover is covered on the ash bucket 17, and the second roller conveyor 2 transports the ash bucket 17 in the reverse direction, see Figure 5 As shown;

[0057] Step S6, when the ash bucket 17 approaches the electric shielding door 3, the electric shielding door 3 is opened, the ash bucket 17 passes through the electric shielding door 3 and enters the first roller conveyor 1, and the electric shielding door 3 is closed.

[0058] In this embodiment, the actual weight of the ash bucket 17 is 90.05 kg. During the ash unloading process, by monitoring the ash unloading glove box 4 and its surrounding environment, the surface dose rate level is 1.78 μSv / h, the space dose rate level is 1.18 μSv / h, and there is no surface contamination on the ground, the surface of the ash unloading glove box 4, and the roller table. The shielding and sealing effects can effectively ensure the radiation safety of the operators.

[0059] Example 4

[0060] This embodiment provides a TBP pyrolysis ash unloading method, which adopts the TBP pyrolysis ash unloading system described in Example 1 and includes the following steps:

[0061] Step 1: Figure 2 As shown, the ash bucket 17 with the bucket mouth opened is hoisted into the first roller conveyor 1, the first clamping and positioning device 15 clamps and positions the ash bucket 17, and the first roller conveyor 1 is started, and the first roller conveyor 1 transports the ash bucket 17 toward the electric screen door 3;

[0062] Step 2: Figure 3 As shown, when the ash bucket 17 approaches the electric shielding door 3, the electric shielding door 3 is opened, and the ash bucket 17 enters the second roller conveyor 2 after passing through the electric shielding door 3, and the electric shielding door 3 is closed. The weighing device 14 weighs the ash bucket 17, and the operator lifts the discharge pipe 7 through the glove operation hole 11, so that the ash bucket 17 smoothly reaches the middle section of the second roller conveyor 2, and then the second clamping and positioning device 16 is opened to clamp and position the ash bucket 17;

[0063] Step 3: Figure 4 As shown, the operator uses the glove operation hole 11 to seal the lower end of the discharge pipe 7 with the barrel opening of the ash barrel 17 through the ash barrel sealing joint 13;

[0064] Step 4, open the star valve 9 of the ash discharge hopper 8, start the screw conveyor 5, start the vibrator 6 to start discharging ash into the ash bucket 17;

[0065] Step 5: When the weight of the ash bucket 17 displayed by the weighing device 14 reaches 92 kg, the ash unloading is completed, the star valve 9 of the ash unloading hopper 8 is closed, the screw conveyor 5 and the vibrator 6 are closed, the unloading pipe 7 is operated through the glove operation hole 11, the ash bucket sealing joint 13 of the unloading pipe 7 is separated from the ash bucket 17, the unloading pipe 7 is lifted, the sealing cover is covered on the ash bucket 17, and the second roller conveyor 2 transports the ash bucket 17 in the reverse direction, see Figure 5 As shown;

[0066] Step S6, when the ash bucket 17 approaches the electric shielding door 3, the electric shielding door 3 is opened, the ash bucket 17 passes through the electric shielding door 3 and enters the first roller conveyor 1, and the electric shielding door 3 is closed.

[0067] In this embodiment, the actual weight of the ash bucket 17 is 92.03 kg. During the ash unloading process, by monitoring the ash unloading glove box 4 and its surrounding environment, the surface dose rate level is 2.10 μSv / h, the space dose rate level is 1.20 μSv / h, and there is no surface contamination on the ground, the surface of the ash unloading glove box 4, and the roller. The shielding and sealing effects can effectively ensure the radiation safety of the operators.

[0068] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A TBP pyrolysis ash unloading system, comprising an ash unloading hopper, a star valve, an expansion joint, a screw conveyor, an ash unloading glove box, a vibrator, a clamping and positioning device for clamping and positioning an ash bucket, and a discharge pipe with an ash bucket sealing joint at an ash outlet, characterized in that: Also includes a first roller conveyor and a second roller conveyor; There are two clamping and positioning devices, namely a first clamping and positioning device installed on the frame of the first roller conveyor, and a second clamping and positioning device installed on the frame of the second roller conveyor; the second roller conveyor is a roller conveyor with a built-in weighing device, and the weighing value of the weighing device can be observed through the observation window of the dust unloading glove box; An electric shield door is arranged on the side of the ash unloading glove box facing away from the ash unloading hopper; the second roller conveyor is located directly below the discharge pipe in the ash unloading glove box; the second roller conveyor and the first roller conveyor are located on the inner and outer sides of the electric shield door respectively; when the electric shield door is opened, the rollers of the first roller conveyor and the second roller conveyor form an integral roller conveyor to meet the round-trip transportation of the ash bucket; The discharge pipe is a flexible hose that can be completely connected.

2. The TBP pyrolysis ash unloading system according to claim 1, characterized in that: The dust unloading glove box has two observation windows, which are distributed on the front and rear sides of the dust unloading glove box; the glove operation hole of the dust unloading glove box is located on the front side of the dust unloading glove box and below the observation windows.

3. The TBP pyrolysis ash unloading system according to claim 1, characterized in that: The second clamping and positioning device is installed at the middle section of the second roller conveyor, and the middle section of the second roller conveyor is located directly below the discharge pipe.

4. The TBP pyrolysis ash unloading system according to claim 1, characterized in that: The outer shell of the screw conveyor is sealed with the side of the ash unloading glove box facing the ash unloading hopper, and the screw conveyor is arranged in an inclined manner with a high inlet and a low outlet.

5. A TBP pyrolysis ash unloading method, characterized in that: The TBP pyrolysis ash unloading system according to any one of claims 1 to 4 is adopted, and comprises the following steps: Step 1: hoist the ash bucket with the bucket mouth open into the first roller conveyor, the first clamping and positioning device clamps and positions the ash bucket, and the first roller conveyor is started, and the first roller conveyor transports the ash bucket toward the electric screen door; Step 2: When the ash bucket approaches the electric shielding door, the electric shielding door is opened, and the ash bucket enters the second roller conveyor after passing through the electric shielding door. The electric shielding door is closed, and the weighing device weighs the ash bucket. The operator lifts the discharge pipe through the glove operation hole to make the ash bucket smoothly reach the middle section of the second roller conveyor. Then the second clamping and positioning device is turned on to clamp and position the ash bucket; Step 3: The operator uses the glove operation hole to seal the lower end of the discharge pipe with the ash bucket mouth through the ash bucket sealing joint; Step 4: Open the star valve of the ash hopper, start the screw conveyor, and start the vibrator to start unloading ash into the ash bucket; Step 5: When the weight of the ash bucket displayed by the weighing device reaches the required value, the ash unloading is completed, the star valve of the ash unloading hopper is closed, the screw conveyor and the vibrator are closed, the unloading pipe is operated through the glove operation hole, the ash bucket sealing joint of the unloading pipe is separated from the ash bucket, the unloading pipe is lifted, the sealing cover is put on the ash bucket, and the second roller conveyor transports the ash bucket in the reverse direction; Step S6, when the ash bucket approaches the electric shielding door, the electric shielding door is opened, the ash bucket enters the first roller conveyor after passing through the electric shielding door, and the electric shielding door is closed.

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