阅读说明：本技术 一种连续排渣方法及系统 (Continuous deslagging method and system ) 是由 逯迎春 宋晓鹏 吴志强 侯留东 陈勇 李思凡 陈琪 庞臻 于 2020-07-22 设计创作，主要内容包括：本发明公开一种连续排渣的方法,包括：S1,间歇性地向放置在料液贮槽的料液中的吹扫装置通入第一压缩气体,以使进入到吹扫装置内的料液喷出形成料液射流,并通过所述料液射流将分散在料液贮槽内的残渣吹扫至提升装置的提升管吸入口处；S2,连续地向所述提升装置通入第二压缩气体,以通过提升装置的提升管吸入口将料液贮槽内的残渣吸入并提升后排出。本发明还公开一种用于上述方法的连续排渣系统。本发明可实现稳定、连续排渣,避免产生剧烈震动等问题。(The invention discloses a method for continuously discharging slag, which comprises the following steps: s1, intermittently introducing a first compressed gas into the blowing device placed in the feed liquid storage tank, so that the feed liquid entering the blowing device is sprayed to form a feed liquid jet flow, and blowing the residues dispersed in the feed liquid storage tank to a lifting pipe suction port of the lifting device through the feed liquid jet flow; and S2, continuously introducing a second compressed gas into the lifting device to suck the residue in the feed liquid storage tank through a lifting pipe suction inlet of the lifting device, lifting and discharging. The invention also discloses a continuous slag discharging system for the method. The invention can realize stable and continuous slag discharge and avoid the problems of severe vibration and the like.)

1. A continuous slagging process comprising:

s1, intermittently introducing a first compressed gas into the blowing device placed in the feed liquid storage tank, so that the feed liquid entering the blowing device is sprayed to form a feed liquid jet flow, and blowing the residues dispersed in the feed liquid storage tank to a lifting pipe suction port of the lifting device through the feed liquid jet flow;

and S2, continuously introducing a second compressed gas into the lifting device to suck the residue in the feed liquid storage tank through a lifting pipe suction inlet of the lifting device, lifting and discharging.

2. The continuous slagging method according to claim 1, wherein said step S1 comprises the steps of:

s101, introducing first compressed gas into the compressed air tank until the gas pressure in the compressed air tank reaches a preset pressure threshold and a preset volume threshold;

s102, introducing the first compressed gas in the compressed air tank into the purging device to enable the feed liquid entering the purging device to be sprayed out and form feed liquid jet flow until the feed liquid in the purging device is completely sprayed out;

s103, standing the purging device until the purging device is refilled with the feed liquid in the feed liquid storage tank;

and S104, repeating the steps S101 to S103, and circulating the steps.

3. The continuous slagging method according to claim 1, wherein, in the step S101,

the pressure threshold is set according to the pressure of the first compressed gas required for completely spraying the feed liquid in the blowing device, and the volume threshold is set according to the volume of the first compressed gas required for completely spraying the feed liquid in the blowing device.

4. The continuous slagging method according to claim 1, wherein, in the step S103,

and the standing time is more than or equal to the time required for the pressure in the purging device to reach a stable state after the first compressed gas is stopped being introduced into the purging device.

5. A continuous slagging system, characterized in that it comprises a purging unit, a lifting unit and a control unit, the purging unit comprises a purging device (2), the lifting unit comprises a lifting device (3),

the blowing device and the lifting device are both arranged in the feed liquid storage tank (1), the blowing device comprises a nozzle, the lifting device comprises a second air inlet pipe (7) and a lifting pipe (8),

the control unit is connected with the blowing unit and used for controlling the first compressed gas to be introduced into the blowing device so that the feed liquid entering the blowing device is sprayed out from the nozzle to form feed liquid jet flow, and the residue dispersed in the feed liquid storage tank is blown to a lifting pipe suction port of the lifting device through the feed liquid jet flow;

the control unit is also connected with the lifting device and used for controlling second compressed gas to be introduced into a second gas inlet pipe of the lifting device so as to suck and lift residues in the feed liquid storage tank through a lifting pipe suction inlet of the lifting device and then discharge the residues.

6. Continuous slagging system according to claim 5, characterized in that the purge unit further comprises a first compressed gas supply device (14) and a pressure tank (5), the control unit comprising a time controller (4),

the first compressed gas supply equipment is used for supplying the first compressed gas and is communicated with the air tank through a first gas inlet pipe (6), a first valve (11) is arranged on the first gas inlet pipe and is connected with the time controller and used for controlling the on-off of the first gas inlet pipe under the control of the time controller;

the compressed air tank is communicated with the air inlet end of the blowing device through an exhaust pipe (9), and a second valve (12) is arranged on the exhaust pipe and used for controlling the on-off of the exhaust pipe under the control of the time controller.

7. The continuous slagging system according to claim 6, characterized in that the purge unit further comprises a first pressure detection assembly (15), a liquid level detection assembly (17) and a liquid replenishment assembly (16),

the first pressure detection assembly is connected with the time controller and is used for detecting the pressure of the first compressed gas in the compressed air tank;

the time controller is used for receiving a pressure value detected by the first pressure detection assembly after controlling the first valve to be opened, and controlling the first valve to be closed when the pressure value reaches a preset pressure threshold value;

the liquid level detection assembly is connected with the time controller and is used for detecting a liquid level value in the pressure air tank;

the time controller is also connected with the liquid supplementing assembly and used for receiving the liquid level value detected by the liquid level detecting assembly and controlling the liquid supplementing assembly to supplement liquid into the air compression tank when the liquid level value does not reach a preset liquid level threshold value in the air compression tank so as to adjust the volume of the first compressed gas in the air compression tank to the volume threshold value.

8. Continuous slagging system according to claim 7, characterized in that the lifting unit further comprises a second compressed gas supply device (19),

the second compressed gas supply equipment is used for supplying the second compressed gas, is communicated with the lifting device through a second gas inlet pipe (7), is provided with a third valve (13),

and the third valve is connected with the time controller and used for controlling the on-off of the second air inlet pipe under the control of the time controller.

9. The continuous slag discharging system of claim 8, wherein the time controller has a timing function, and the time controller further comprises a first preset time, a second preset time, a third preset time, and a fourth preset time,

the time controller is used for starting timing after controlling the third valve (13) to be opened and controlling the first valve (11) to be opened when the timing duration reaches a first preset time;

the time controller is also used for starting timing when controlling the first valve to be closed and controlling the second valve (12) to be opened when the timing duration reaches a second preset time; when the second valve is controlled to be opened, timing is started, and when the timing duration reaches a third preset time, the second valve is controlled to be closed;

the time controller is also used for starting timing when the second valve is closed and controlling the first valve to be opened when the timing duration reaches a fourth preset time.

10. The continuous slag discharge system according to any one of claims 5-9, wherein the second inlet pipe comprises a normal section (20) and a variable diameter section (21), the variable diameter section is arranged at the outlet end of the second inlet pipe, both ends of the variable diameter section are respectively communicated with a part of the normal section, and the aperture of the variable diameter section is smaller than that of the normal section.

Technical Field

The invention belongs to the technical field of nuclear, and particularly relates to a method and a system for continuously discharging residues generated by dissolution in a spent fuel post-treatment process.

Background

In the process of the spent fuel post-treatment continuous dissolution process, short sections of the sheared spent fuel are continuously added into the dissolver and are subjected to dissolution reaction with nitric acid in the dissolver, insoluble residues are continuously generated by the dissolution reaction and accumulated at the bottom of a flat tank of the dissolver, and the problems of local temperature rise, hardening and the like of the bottom of the flat tank can be caused, so that the spent fuel needs to be discharged in time.

At present, the deposited residues are taken out mainly through the matching operation of a purging device and a lifting device. However, the traditional blowing device blows the residue to the residue inlet of the lifting device through the blown compressed air flow, and the mode of blowing the residue through the air flow formed by the compressed air can cause the feed liquid, the residue and the blowing device in the dissolver to generate violent oscillation, which is not beneficial to lifting and taking out the residue. In addition, the lifting air inlet pipe of the existing lifting device is directly connected with the lifting pipe, when the air inflow is large, air flow blowing to the lower part of the lifting pipe is easily formed, back blowing is caused, and residues are blown away from a residue inlet of the lifting device, so that the slag discharging effect is reduced.

Disclosure of Invention

The technical problem to be solved by the invention is to provide a continuous slag discharging method and a continuous slag discharging system aiming at the defects in the prior art, which can realize stable and continuous slag discharging and avoid the problems of severe vibration and the like.

According to one aspect of the invention, a continuous deslagging method is provided, which comprises the following technical scheme:

a continuous slagging process comprising:

s1, intermittently introducing a first compressed gas into the blowing device placed in the feed liquid storage tank, so that the feed liquid entering the blowing device is sprayed to form a feed liquid jet flow, and blowing the residues dispersed in the feed liquid storage tank to a lifting pipe suction port of the lifting device through the feed liquid jet flow;

and S2, continuously introducing a second compressed gas into the lifting device to suck the residue in the feed liquid storage tank through a lifting pipe suction inlet of the lifting device, lifting and discharging.

Preferably, the step S1 includes the steps of:

s101, introducing first compressed gas into the compressed air tank until the gas pressure in the compressed air tank reaches a preset pressure threshold and a preset volume threshold;

s102, introducing the first compressed gas in the compressed air tank into the purging device to enable the feed liquid entering the purging device to be sprayed out and form feed liquid jet flow until the feed liquid in the purging device is completely sprayed out;

s103, standing the purging device until the purging device is refilled with the feed liquid in the feed liquid storage tank;

and S104, repeating the steps S101 to S103, and circulating the steps.

Preferably, in the step S101,

the pressure threshold is set according to the pressure of the first compressed gas required for completely spraying the feed liquid in the blowing device, and the volume threshold is set according to the volume of the first compressed gas required for completely spraying the feed liquid in the blowing device.

Preferably, in the step S103,

and the standing time is more than or equal to the time required for the pressure in the purging device to reach a stable state after the first compressed gas is stopped being introduced into the purging device.

According to another aspect of the present invention, there is provided a continuous slag discharging system, comprising:

a continuous slag discharging system comprises a blowing unit, a lifting unit and a control unit, wherein the blowing unit comprises a blowing device, the lifting unit comprises a lifting device,

the blowing device and the lifting device are both arranged in the feed liquid storage tank, the blowing device comprises a nozzle, the lifting device comprises a second air inlet pipe and a lifting pipe,

the control unit is connected with the blowing unit and used for controlling the first compressed gas to be introduced into the blowing device so that the feed liquid entering the blowing device is sprayed out from the nozzle to form feed liquid jet flow, and the residue dispersed in the feed liquid storage tank is blown to a lifting pipe suction port of the lifting device through the feed liquid jet flow;

the control unit is also connected with the lifting unit and used for controlling the second compressed gas to be introduced into a second gas inlet pipe of the lifting device so as to suck and lift and discharge the residue in the feed liquid storage tank through a lifting pipe suction inlet of the lifting device.

Preferably, the purge unit further comprises a first compressed gas supply device and a pressure empty tank, the control unit comprises a time controller,

the first compressed gas supply equipment is used for supplying the first compressed gas, is communicated with the air tank through a first gas inlet pipe, and is provided with a first valve which is connected with the time controller and used for controlling the on-off of the first gas inlet pipe under the control of the time controller;

the compressed air tank is communicated with the air inlet end of the purging device through an exhaust pipe, and a second valve is arranged on the exhaust pipe and used for controlling the on-off of the exhaust pipe under the control of the time controller.

Preferably, the purging unit further comprises a first pressure detecting component, a liquid level detecting component and a liquid supplementing component,

the first pressure detection assembly is connected with the time controller and is used for detecting the pressure of the first compressed gas in the compressed air tank;

the time controller is used for receiving a pressure value detected by the first pressure detection assembly after controlling the first valve to be opened, and controlling the first valve to be closed when the pressure value reaches a preset pressure threshold value;

the liquid level detection assembly is connected with the time controller and is used for detecting a liquid level value in the pressure air tank;

the time controller is also connected with the liquid supplementing assembly and used for receiving the liquid level value detected by the liquid level detecting assembly and controlling the liquid supplementing assembly to supplement liquid into the air compression tank when the liquid level value does not reach a preset liquid level threshold value in the air compression tank so as to adjust the volume of the first compressed gas in the air compression tank to the volume threshold value.

Preferably, the lifting unit further comprises a second compressed gas supply device,

the second compressed gas supply equipment is used for supplying the second compressed gas and is communicated with the lifting device through a second gas inlet pipe, a third valve is arranged on the second gas inlet pipe,

and the third valve is connected with the time controller and used for controlling the on-off of the second air inlet pipe under the control of the time controller.

Preferably, the time controller has a timing function, and a first preset time, a second preset time, a third preset time and a fourth preset time are further arranged in the time controller,

the time controller is used for starting timing after controlling the third valve to be opened and controlling the first valve to be opened when the timing duration reaches a first preset time;

the time controller is also used for starting timing when controlling the first valve to be closed and controlling the second valve to be opened when the timing duration reaches a second preset time; when the second valve is controlled to be opened, timing is started, and when the timing duration reaches a third preset time, the second valve is controlled to be closed;

the time controller is also used for starting timing when the second valve is closed and controlling the first valve to be opened when the timing duration reaches a fourth preset time.

Preferably, the second air inlet pipe comprises a normal section and a variable diameter section, the variable diameter section is located at the outlet end of the second air inlet pipe, two ends of the variable diameter section are respectively communicated with a part of the normal section, and the aperture of the variable diameter section is smaller than that of the normal section.

The invention has the beneficial effects that:

the continuous deslagging method can realize stable and continuous deslagging, does not generate huge vibration, can reduce the damage to the system, is simple to operate, safe and reliable, does not need maintenance, is favorable for realizing automatic control, improves deslagging efficiency, and has wide application range.

According to the continuous deslagging system, the feed liquid enters the blowing device and is sprayed out to generate the feed liquid jet flow, so that the residue in the feed liquid is blown to the suction port of the lifting device and then discharged.

Drawings

FIG. 1 is a flowchart of a continuous slagging method in an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of a continuous slagging system according to an embodiment of the present invention;

fig. 3 is a partial schematic structural view of the lifting device 3 in fig. 2;

in the figure: 1-a feed liquid storage tank; 2-a purging device; 3-a lifting device; 4-a time controller; 5-compressing the tank; 6-a first air inlet pipe; 7-a second inlet pipe; 8-a riser; 9-an exhaust pipe; 10-exhaust aperture; 11-a first valve; 12-a second valve; 13-a third valve; 14-a first compressed gas supply device; 15-a first pressure sensing assembly; 16-a fluid infusion component; 17-a liquid level detection assembly; 18-a second pressure sensing assembly; 19-a second compressed gas supply device; 20-normal section; 21-variable diameter section.

Detailed Description

In order to make the technical solutions of the present invention better understood, the present invention will be further clearly and completely described below with reference to the accompanying drawings and specific examples of the present invention.