Powder reactive hazardous waste feeding device and control system thereof

Abstract

The utility model relates to the technical field of hazardous waste feeding, in particular to a powdery reactive hazardous waste feeding device and a control system thereof, the feeding device comprises a waste storage tank, an inert gas purging device, a feeding channel, a discharging channel, an inert gas purging device and a control system, and the waste storage tank is provided with the feeding channel and the discharging channel. The inert gas purging device is communicated with the waste storage tank through a first gas conveying pipeline and further communicated with a discharging channel of the waste storage tank through a second gas conveying pipeline. The utility model solves the problem that the safety of the temporary storage and feeding process of the reactive hazardous wastes cannot be guaranteed due to the fact that the existing reactive hazardous wastes are easy to contact with other substances in a temporary storage state waiting for incineration.

Description

Technical Field

[0001] The utility model relates to the technical field of hazardous waste feeding, in particular to a powdered reactive hazardous waste feeding device and a control system thereof. Background Art

[0002] Hazardous waste refers to waste that is listed in the national hazardous waste list or is identified as having hazardous characteristics according to the national hazardous waste identification standards and identification methods. It usually has the following properties: 1) It has one or more hazardous characteristics such as corrosiveness, toxicity, flammability, reactivity or infection; 2) It is not ruled out that it has hazardous characteristics and may cause harmful effects on the environment or human health, and needs to be managed as hazardous waste.

[0003] Reactivity generally refers to: (1) explosive properties, ① unstable at normal temperature and pressure, prone to drastic changes under non-detonation conditions; ② prone to detonation or explosive decomposition reactions under standard temperature and pressure; ③ detonation or explosion reactions can occur when subjected to strong detonators or heated under closed conditions; (2) detonation or explosion reactions can occur when subjected to strong detonators or heated under closed conditions, ① violent chemical reactions occur when mixed with water, and a large amount of flammable gas and heat are released; ② toxic gases, steam or smoke that are harmful to human health or the environment can be produced when mixed with water; ③ under acidic conditions, each kilogram of waste containing chemical compounds decomposes to produce ≥250 mg of hydrogen gas, or each kilogram of waste containing sulfide compounds decomposes to produce ≥500 mg of hydrogen sulfide gas; (3) waste oxidants or organic peroxides, ① waste oxidants that are extremely prone to combustion or explosion; ② waste organic peroxides containing peroxide groups that are extremely sensitive to heat, vibration or friction.

[0004] At present, reactive hazardous wastes, except for some explosive wastes, are usually disposed of by incineration. However, the incineration disposal process inevitably involves temporary storage and contact with other substances during the feeding process, which leads to the problem that the safety of the temporary storage and feeding process of reactive hazardous wastes cannot be guaranteed.

[0005] Therefore, a powdered reactive hazardous waste feeding device and a control system thereof came into being. Utility Model Content

[0006] The utility model proposes a powdered reactive hazardous waste feeding device and a control system thereof, which mainly solves the problem that the safety of the reactive hazardous waste temporary storage and feeding process cannot be guaranteed because the existing reactive hazardous waste is easily contacted with other substances when temporarily stored waiting for incineration.

[0007] The utility model proposes a feeding device for powdered reactive hazardous waste, comprising a waste storage tank, on which a feeding channel and a discharging channel are formed:

[0008] An inert gas purge device is connected to the waste storage tank through a first gas delivery pipeline, and the inert gas purge device is also connected to a discharge channel of the waste storage tank through a second gas delivery pipeline.

[0009] Preferably, the device further comprises a solvent storage tank, wherein the solvent storage tank is connected to the discharge channel.

[0010] Preferably, it also includes a pressure sensor, and there are two pressure sensors, which are respectively connected to the first gas delivery pipeline and the second gas delivery pipeline.

[0011] Preferably, a sight glass is provided on the discharge channel of the waste storage tank, and the sight glass is provided close to the free end of the discharge channel.

[0012] Preferably, a weighing device is further included, and the weighing device is arranged at the bottom of the waste storage tank.

[0013] Preferably, it further comprises a plurality of control valves, all of which are distributed on the feed channel, the discharge channel, the first gas delivery pipeline, and the second gas delivery pipeline.

[0014] The utility model also proposes a control system for a powdered reactive hazardous waste feeding device, comprising:

[0015] Controller;

[0016] an inert gas purge device, the inert gas purge device being electrically connected to the controller;

[0017] A plurality of control valves, all of which are electrically connected to the controller;

[0018] The controller is used to control the opening and closing of the feed channel and the discharge channel of the waste storage tank, and the first gas delivery pipeline and the second gas delivery pipeline through the control valve.

[0019] Preferably, it also includes:

[0020] a pressure sensor, the pressure sensor being electrically connected to the controller;

[0021] The controller is used to receive the detection value of the pressure sensor; and is also used to control the preset opening of the control valve according to the detection value of the pressure sensor.

[0022] As can be seen from the above, the application of the technical solution provided by the utility model can achieve the following beneficial effects:

[0023] First, the feeding device and control system proposed in the utility model fill the waste storage tank and its external passage with inert gas, effectively isolating the reactive hazardous waste from contact with oxygen and water, thereby improving the safety of the hazardous waste in a temporary storage state;

[0024] Second, the feeding device and control system proposed by the utility model use solvents to clean and remove the hazardous waste or incineration reactants remaining on the discharge channel of the waste storage tank, thereby ensuring the safety and stability of the temporary storage environment for hazardous wastes;

[0025] Third, the feeding device and its control system proposed by the utility model are provided with a pressure sensor, and the opening of the inert gas purge is controlled according to the detection of the pressure sensor, so that the pressure in the waste storage tank is maintained stable, thereby ensuring the safety of the hazardous waste storage environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0027] Figure 1 This is a structural block diagram of the feeding device in Example 1 of the utility model. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only some embodiments of the utility model, not all embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] Existing reactive hazardous wastes are easily exposed to other substances when they are temporarily stored while waiting to be incinerated, resulting in the problem that the safety of the temporary storage and feeding process of the reactive hazardous wastes cannot be guaranteed.

[0030] Example 1

[0031] like Figure 1As shown, in order to solve the above problems, the present embodiment proposes a feeding device for powdered reactive hazardous waste, comprising a waste storage tank 10 and an inert gas purge device; a feeding channel and a discharging channel are formed on the waste storage tank 10; the inert gas purge device is connected to the waste storage tank 10 through a first gas delivery pipeline, and the inert gas purge device is also connected to the discharging channel of the waste storage tank 10 through a second gas delivery pipeline.

[0032] It should be emphasized that a plurality of control valves are distributed on the feed channel and the discharge channel, and a plurality of control valves are also distributed on the first gas delivery pipeline and the second gas delivery pipeline.

[0033] Preferably, the waste storage tank 10 in this embodiment is a pressure-sealed storage tank.

[0034] Preferably, the inert gas filled in the inert gas purge device in this embodiment is nitrogen.

[0035] Preferably, in this embodiment, the first gas delivery pipeline and the feed channel are both connected and arranged at the top of the waste storage tank 10; the discharge channel is connected and arranged at the bottom of the waste storage tank 10. Preferably, but not limited to, the discharge channel should be connected to an external incineration delivery pipeline, and the discharge channel is vertically connected to the incineration delivery pipeline.

[0036] Preferably, in this embodiment, the first gas delivery pipeline and the second gas delivery pipeline are both connected to the inert gas purging device through a common air intake pipeline, and a control valve V5 is provided on the air intake pipeline to control the conduction. In this embodiment, the control valve 5 can be used to control whether the inert gas is purged.

[0037] Preferably, the feed channel is provided with a control valve V3, the discharge channel is provided with a control valve V7, the incineration conveying pipeline is provided with a control valve V9, and the control valve V9 is provided close to the kiln head spray gun.

[0038] In the present embodiment, the inert gas purging device achieves the effect of filling the waste tank 10 by transporting the inert gas outward and connecting the waste storage tank 10 along the first gas transport pipeline, thereby discharging gases such as oxygen from the inside of the waste storage tank 10. This prevents hazardous waste in the waste storage tank 10 from contacting with water or oxygen. In addition, the inert gas can also be connected to the discharge channel through the second gas transport pipeline to prevent hazardous waste from contacting with water or oxygen in the discharge channel, thereby achieving water- and oxygen-proof storage of hazardous waste in the present embodiment, and ensuring the safe temporary storage process of hazardous waste.

[0039] More specifically, it also includes a solvent storage tank; the solvent storage tank is connected to the discharge channel.

[0040] Preferably, the solvent in this embodiment is a medium that is compatible with the characteristics of the reactants.

[0041] Preferably, the solvent storage tank is connected to the incineration delivery pipeline, and the solvent storage tank and the incineration delivery pipeline are located on the same horizontal plane to ensure smooth delivery of the solvent and to avoid the retention of the solvent in the pipeline as much as possible.

[0042] Preferably, a control valve V8 is provided at the output end of the solvent storage tank. Since the control valve V8 is provided close to the output end of the solvent storage tank, it can be used for overall control of whether to open the solvent storage tank.

[0043] In this embodiment, when discharging materials at a certain time, residues remain in the discharging channel and the incineration conveying channel. Therefore, by cleaning with a solvent that can produce a corresponding reaction, damage to the conveying pipeline caused by the residues can be effectively prevented.

[0044] More specifically, it also includes a pressure sensor; there are two pressure sensors, which are respectively connected to the first gas delivery pipeline and the second gas delivery pipeline.

[0045] In this embodiment, the pressure sensors P1 and P2 are used to detect the gas pressure in the first gas delivery pipeline and the second gas delivery pipeline respectively, and can be controlled in conjunction with the control valve to achieve gas stability between the first gas delivery pipeline and the second gas delivery pipeline.

[0046] More specifically, a sight glass is provided on the storage channel of the waste storage tank 10, and the sight glass is provided close to the free end of the discharge channel.

[0047] Preferably, the sight glass is arranged on the incineration conveying passage.

[0048] In this embodiment, the viewing mirror can be used to observe the transportation of hazardous wastes and to observe whether any hazardous wastes remain after the incineration reaction.

[0049] More specifically, a weighing device is also included, and the weighing device is arranged at the bottom of the waste storage tank 10 .

[0050] In this embodiment, the weighing device is used to weigh the content of hazardous waste. At the same time, during the incineration process, the transportation and disposal volume of hazardous waste is checked through the weighing device, and it can be adjusted in real time through the control valve V7 of the discharge channel.

[0051] Example 2

[0052] In order to solve the aforementioned problems, this embodiment proposes a control system applicable to the device described in Example 1, including a controller, and an inert gas purge device and a plurality of control valves electrically connected to the controller respectively; wherein the controller is used to control the opening and closing of the feed channel and the discharge channel of the waste storage tank 10, and the first gas delivery pipeline and the second gas delivery pipeline through the control valve.

[0053] More specifically, it also includes a pressure sensor electrically connected to the controller. The controller is used to receive the detection value of the pressure sensor and control the opening of the corresponding control valve according to the detection value.

[0054] Preferably, it also includes a weighing device electrically connected to the controller, and the controller is used to determine whether to adjust the opening of the corresponding control valve according to the decreasing speed of the detection value of the weighing device.

[0055] In summary, the working process of a powdered reactive hazardous waste feeding device and its control system proposed in Example 1 and Example 2 is as follows:

[0056] (1) Connect the waste storage tank 10 to the control valves V2 and V7 and place them on the weighing module W1 for weighing;

[0057] (2) Open control valve V5, control valve V4, and control valve V1 in sequence to replace and purge the pipeline with nitrogen to ensure that there is no water or oxygen. After the purge is completed, close control valve V1 and open control valve V2. Use the feedback from pressure sensor P1 and adjust the opening of control valve V4 to keep the pressure at the set value;

[0058] (3) Open control valve V6 and control valve V9 in sequence to purge the pipeline with nitrogen;

[0059] (4) After the replacement purge is completed, the pressure is maintained at the set value by using the feedback from the pressure sensor P2 and adjusting the opening of the control valve V6;

[0060] (5) Open the control valve V7, determine the waste transport and disposal volume based on the real-time changes in the sight glass and the weight of the storage tank, and adjust the opening of the control valve V7;

[0061] (6) The reactive waste in the storage tank is transported to the incineration system for incineration disposal by nitrogen. During the transportation process, nitrogen is added to the storage tank through the control valve V2 and a certain pressure is maintained in the tank;

[0062] (7) After the disposal is completed, close the control valve V7, control valve V2, and control valve V4, and continue to purge the delivery pipeline with nitrogen to prevent a large amount of waste from remaining in the pipeline;

[0063] (8) After the purging is completed, control valves V6 and V5 are closed, control valve V8 is opened, and the delivery pipeline is cleaned with a corresponding solvent, and trace residues in the pipeline are removed by reaction cleaning, and the mixture is delivered to the incineration system for disposal;

[0064] (9) After the purge is completed, close the control valve V8, open the control valve V6 and the control valve V5, and use nitrogen to replace and purge the delivery pipeline;

[0065] (10) After purging, close control valve V9, control valve V6, and control valve V5 to complete the entire transportation and disposal process and wait for the next use.

[0066] The above-described implementation methods do not constitute a limitation on the protection scope of the technical solution. Any modification, equivalent replacement and improvement made within the spirit and principle of the above-described implementation methods shall be included in the protection scope of the technical solution.

Claims

1. A feeding device for powdered reactive hazardous waste, characterized in that: include: A waste storage tank, wherein a feed channel and a discharge channel are formed on the waste storage tank: An inert gas purge device is connected to the waste storage tank through a first gas delivery pipeline, and the inert gas purge device is also connected to a discharge channel of the waste storage tank through a second gas delivery pipeline.

2. A powdered reactive hazardous waste feeding device according to claim 1, characterized in that: Also includes: A solvent storage tank is connected to the discharge channel.

3. A powdered reactive hazardous waste feeding device according to claim 2, characterized in that: Also includes: Pressure sensors, there are two pressure sensors, which are respectively connected to the first gas delivery pipeline and the second gas delivery pipeline.

4. A powdered reactive hazardous waste feeding device according to claim 3, characterized in that: A sight glass is arranged on the discharge channel of the waste storage tank, and the sight glass is arranged close to the free end of the discharge channel.

5. A powdered reactive hazardous waste feeding device according to any one of claims 1 to 4, characterized in that: Also includes: A weighing device is arranged at the bottom of the waste storage tank.

6. A powdered reactive hazardous waste feeding device according to claim 5, characterized in that: Also includes: A plurality of control valves, all of which are distributed on the feed channel, the discharge channel, the first gas delivery pipeline, and the second gas delivery pipeline.

7. A control system for a feeding device for reactive hazardous waste in powder form, used to control the feeding device according to any one of claims 1 to 6, characterized in that: include: Controller; an inert gas purge device, the inert gas purge device being electrically connected to the controller; A plurality of control valves, all of which are electrically connected to the controller; The controller is used to control the opening and closing of the feed channel and the discharge channel of the waste storage tank, and the first gas delivery pipeline and the second gas delivery pipeline through the control valve.

8. The control system of a powdered reactive hazardous waste feeding device according to claim 7, characterized in that: Also includes: a pressure sensor, the pressure sensor being electrically connected to the controller; The controller is used to receive the detection value of the pressure sensor; It is also used to control the preset opening of the control valve according to the detection value of the pressure sensor.

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