CN214133307U - A repair system for mercury pollutes soil - Google Patents

Abstract

The utility model discloses a repair system for mercury pollutes soil, spray the unit including the medicament, spray the heat treatment unit of unit discharge gate intercommunication with the medicament to and the tail gas processing unit of heat treatment unit's tail gas export intercommunication.

Description

A repair system for mercury pollutes soil

Technical Field

The utility model relates to a soil remediation technical field, in particular to a repair system for mercury pollutes soil.

Background

Mercury is a toxic heavy metal element which exists in a liquid state at normal temperature and normal pressure, is volatile, and can be remotely transmitted along with the atmosphere. Due to the volatile nature of mercury, thermal desorption techniques are widely used to treat mercury in various solid forms.

In the existing practical operation, the mercury-polluted soil can be repaired by adopting a thermal desorption technology. Theoretically, the temperature required for removing mercury and mercury compounds in soil is higher, about 600 ℃, but the temperature may be higher in actual operation, which leads to higher energy consumption and treatment cost of thermal desorption, and once the mercury compounds contained in soil are more complex, the problems of poor remediation effect, low treatment efficiency and the like may also occur.

SUMMERY OF THE UTILITY MODEL

To the part or all problems among the prior art, the utility model provides a repair system for mercury pollutes soil, it pollutes soil to mercury before carrying out the thermal desorption, earlier to mercury pollutes soil and sprays the medicament, the existence form of mercury compound in the conversion soil, and then reduces the required temperature of thermal desorption, repair system includes:

a medicament spray unit comprising:

the reagent stirring tank comprises a feeding port and a discharging port; and

the medicament box is communicated with the inside of the medicament stirring tank through a medicament spray head and is used for storing medicament;

a heat treatment unit comprising:

the heating tank comprises a feeding port, a discharging port, an air inlet and a tail gas outlet, wherein the feeding port is communicated with the discharging port of the medicament stirring tank;

a heating rod disposed inside the heating tank; and

a fan, which is communicated with the air inlet and is used for injecting air into the heating tank;

and

and the air inlet of the tail gas treatment unit is communicated with the tail gas outlet of the heating tank and is used for treating tail gas.

Further, the medicament agitator tank is supported by a bracket, and the height of the bracket can be adjusted to adjust the angle of the medicament agitator tank.

Further, the unit is sprayed with the medicament still includes first agitator, first agitator set up in inside the medicament agitator tank.

Further, the agent is a chloride salt and/or citric acid.

Further, the pan feeding mouth of heating jar pass through the conveyer belt with the discharge gate intercommunication of medicament agitator tank.

Further, the conveying speed of the conveyor belt is adjustable.

Further, the tank body of the heating tank includes: shell, heat preservation and inner wall.

Further, the heating processing unit further includes a temperature sensor disposed inside the heating tank.

Further, the heat treatment unit further includes a second stirrer controlled by a driver.

The utility model provides a pair of a repair system for mercury pollutes soil for the dystopy mercury pollutes soil thermal desorption, and it includes that the medicament sprays unit and heat treatment unit, and collection medicament adds and the thermal desorption attaches in a system. The medicament sprays the unit and passes through parts such as conveyer belt with the heating process unit and be connected, make before carrying out thermal desorption, soil is earlier carried out the preliminary treatment through adding medicaments such as chlorine salt or citric acid in the medicament sprays the unit, mercury in the contaminated soil through medicament processing is turned into volatile form, further carry out thermal desorption again this moment and handle, required temperature greatly reduced, make high temperature thermal desorption turn into low temperature thermal desorption, the effect of mercury contaminated soil is restoreed in the dystopy thermal desorption has been improved, the required energy consumption of restoration has been reduced, repair cost has been reduced, make thermal desorption technique more be applicable to the soil that various mercury pollution situation are complicated.

Drawings

To further clarify the above and other advantages and features of various embodiments of the present invention, a more particular description of various embodiments of the invention will be rendered by reference to the appended drawings. It is appreciated that these drawings depict only typical embodiments of the invention and are therefore not to be considered limiting of its scope. In the drawings, the same or similar components will be denoted by the same or similar reference numerals for clarity.

Fig. 1 shows a schematic structural diagram of a remediation system for mercury-contaminated soil according to an embodiment of the present invention.

Detailed Description

The invention will be further elucidated with reference to the drawings in conjunction with the detailed description. It should be noted that the components in the figures may be exaggerated and not necessarily to scale for illustrative purposes. In the figures, identical or functionally identical components are provided with the same reference symbols.

In the present invention, "disposed on …", "disposed above …" and "disposed over …" do not exclude the presence of an intermediate therebetween, unless otherwise specified. Further, "disposed on or above …" merely indicates the relative positional relationship between two components, and may also be converted to "disposed below or below …" and vice versa in certain cases, such as after reversing the product direction.

In the present invention, the embodiments are only intended to illustrate the aspects of the present invention, and should not be construed as limiting.

In the present application, the terms "a" and "an" do not exclude the presence of a plurality of elements, unless otherwise indicated.

It is further noted herein that in embodiments of the present invention, only a portion of the components or assemblies may be shown for clarity and simplicity, but those skilled in the art will appreciate that the components or assemblies may be added as needed for specific scenarios, given the teachings of the present invention.

It is also to be noted that, within the scope of the present invention, the expressions "identical", "equal", etc., do not mean that the two values are absolutely equal, but allow a certain reasonable error, that is, the expressions also cover "substantially identical", "substantially equal". By analogy, in the present disclosure, the terms "perpendicular to", "parallel to", and the like in the table direction also cover the meaning of "substantially perpendicular to", "substantially parallel to".

The scheme of the utility model is based on the following insights of inventor: different forms of mercury compounds have greatly different volatilization temperatures, for example, theoretically, the temperature required for removing mercury and mercury compounds in soil is 600 ℃, and when the soil does not contain mercury oxide, only 250 ℃ is required to sufficiently remove mercury pollution in soil, so that the form and concentration of mercury in soil are important factors influencing thermal desorption temperature when the thermal desorption technology is used for treating mercury-polluted soil. In order to reduce energy consumption, the inventor finds that if the mercury-polluted soil is pretreated before thermal desorption, for example, a proper medicament is added to change the occurrence form of mercury in the soil so as to convert the mercury into a volatile form, the heating temperature and desorption time of the thermal desorption can be effectively reduced. To this discovery, the utility model provides a repair system for mercury pollutes soil, the form branch according to mercury compound in the soil is different, only needs the different medicament of allotment, and need not to reform transform repair equipment, also makes repair equipment obtain improving to complex environment's adaptability.

The invention will be further elucidated with reference to the drawings in conjunction with the detailed description.

Fig. 1 shows a schematic structural diagram of a remediation system for mercury-contaminated soil according to an embodiment of the present invention. As shown in fig. 1, a remediation system for mercury contaminated soil includes a chemical spraying unit 101, a heating processing unit 102, and a tail gas processing unit 103, wherein a feed inlet 1211 of the heating processing unit 102 is communicated with a discharge outlet 1112 of the chemical spraying unit 101 for receiving soil after being processed by a chemical, and the tail gas processing unit 103 is communicated with a tail gas outlet 1214 of the heating processing unit 102 for processing tail gas mixed with mercury contaminants and generated during heating remediation of soil.

The medicine spraying unit 101 comprises a medicine stirring tank 111 and a medicine box 112, wherein the medicine stirring tank is provided with a feeding port 1111 and a discharging port 1112, so as to facilitate the operation, in an embodiment of the present invention, the feeding port 1111 and the discharging port 1112 are respectively disposed at the two ends of the medicine stirring tank 111, and the medicine stirring tank is supported by an adjustable bracket 113, and the height of the adjustable bracket 113 can be adjusted to adjust the angle of the medicine stirring tank, so that the soil is transferred from the discharging port 1112 to the heat treatment unit 102. The chemical box 112 is used for storing chemical agents, because in the embodiment of the present invention, the chemical agents are mainly used for chemically reacting with mercury compounds to change the occurrence of mercury in soil and convert the mercury into volatile forms, therefore, in an embodiment of the present invention, the chemical agents adopt chloride salts and/or citric acid. The chemical box 112 is communicated with the inside of the chemical stirring tank 111 through a chemical spraying port 1121, and the chemical spraying head 1121 is used for spraying the chemical into the chemical stirring tank to be mixed with soil. In order to ensure that the soil can be fully mixed with the chemical, in an embodiment of the present invention, the chemical spraying unit 101 is further provided with a first stirrer 114, the first stirrer 114 may be an electric stirrer, which is disposed inside the chemical stirring tank 111, it should be understood that in other embodiments of the present invention, other modes may be adopted to mix the soil with the chemical, for example, to roll the chemical stirring tank, etc.

The heating processing unit 102 comprises a heating tank 121, a heating rod 122 and a fan 123, wherein the heating tank is provided with a feeding port 1211, a discharging port 1212, an air inlet 1213 and an exhaust gas outlet 1214. Wherein, pan feeding mouth 1211 with the discharge gate 1112 intercommunication of medicament agitator tank for can enter into the heating jar 121 after the soil after the medicament is handled, in an embodiment of the utility model, pan feeding mouth 1211 with the discharge gate 1112 of medicament agitator tank passes through conveyer belt 104 intercommunication, for the convenience of soil transfer, conveyer belt slope sets up, because the form and the concentration of the mercury that contains in the different soil are different, and its required heat treatment time is also different, in order to make heat treatment fully carry out, the accessible is adjusted the transmission rate of conveyer belt 104, controls the soil quantity that enters into in the heating jar 121. The heating rod 122 is arranged inside the heating tank and used for heating soil, so that mercury in the polluted soil is volatilized and separated from the soil, and the heating tank is connected with a fan 123 because air is needed in the process, and the fan 123 sends the needed air into the heating tank through the air inlet 1213. In order to reduce the energy consumption, in an embodiment of the present invention, the heating tank 121 further has a heat-preserving function, and for realizing this function, the tank body of the heat-preserving tank 121 adopts a multilayer design, and sequentially from outside to inside: shell, insulation material and inner wall. In order to further guarantee the thermal desorption effect, in an embodiment of the present invention, the heating tank 121 is further provided with a temperature sensor 124 inside, so as to monitor the temperature inside the heating tank 121 in real time, and guarantee that the temperature reaches the requirement. Furthermore, in the utility model discloses a still in another embodiment, still be provided with second agitator 125, second agitator 125 includes axis of rotation and stirring vane, stirring vane stretches into inside the heating tank, the axis of rotation is then controlled through driver 126, driver 126 drives the axis of rotation of second agitator 125 rotates, and then makes stirring vane can stir the soil in the heating tank, makes its even heating.

Based on the remediation system, the remediation process of the mercury-contaminated soil is as follows:

firstly, feeding mercury contaminated soil to be repaired into the reagent stirring tank 111 through the feeding port 1111, and storing reagents such as chloride salt or citric acid in the reagent box 112;

next, spraying the pesticide onto the soil in the agitator tank through the pesticide spraying port 1121, and simultaneously, turning on the first agitator 114, and agitating while spraying the pesticide, so that the pesticide and the soil are fully mixed;

next, adjusting the bracket 113 to incline the chemical stirring tank 111 for soil transfer, transferring the soil mixed with the chemical to the conveyor belt 104 through the discharge port 1112, adjusting the rotation speed of the conveyor belt 104 according to the form of mercury in the soil and the concentration of pollutants, and feeding the soil into the heating tank 121 through the feed port 1211;

next, the heating rod 122 is turned on, the fan 123 is turned on, air is injected into the heating tank, so that the temperature in the heating tank 121 is raised, mercury is separated from soil and volatilized, and the tail gas mixed with mercury pollutants enters the tail gas treatment unit 103 through the tail gas outlet 1214 to be subjected to centralized treatment, so as to complete thermal desorption, in the process, the real-time temperature in the heating tank 121 can be monitored online through the temperature sensor 124, and meanwhile, the driver 126 is turned on to drive the second stirrer 125 to rotate, so as to stir the soil in the heating tank, so as to uniformly heat the soil; and

finally, the soil after thermal desorption is discharged from the discharge port 1222 for collection and acceptance.

While various embodiments of the present invention have been described above, it should be understood that they have been presented by way of example only, and not limitation. It will be apparent to persons skilled in the relevant art that various combinations, modifications, and changes can be made thereto without departing from the spirit and scope of the invention. Thus, the breadth and scope of the present invention should not be limited by any of the above-described exemplary embodiments, but should be defined only in accordance with the following claims and their equivalents.

Claims (9)

1. A remediation system for mercury contaminated soil, comprising:

a medicament spray unit comprising:

the reagent stirring tank comprises a feeding port and a discharging port; and

the medicament box is communicated with the inside of the medicament stirring tank through a medicament spray head;

a heat treatment unit comprising:

the heating tank comprises a feeding port, a discharging port, an air inlet and a tail gas outlet, wherein the feeding port is communicated with the discharging port of the medicament stirring tank;

a heating rod disposed inside the heating tank; and

a fan in communication with the air inlet for injecting air into the heating tank; and

and the air inlet of the tail gas treatment unit is communicated with the tail gas outlet of the heating tank.

2. The repair system of claim 1 wherein the medicament agitator tank is supported by a bracket, the bracket being adjustable in height.

3. The repair system of claim 1 wherein the medication spray unit further comprises a first agitator disposed inside the medication agitator tank.

4. The repair system of claim 1 wherein the kit is configured to store a medicament, the medicament being a chloride salt and/or citric acid.

5. The rehabilitation system of claim 1, wherein the inlet of the heating tank is in communication with the outlet of the medicament stirring tank via a conveyor belt.

6. The repair system of claim 5 wherein the conveyor belt has an adjustable conveyor speed.

7. A repair system according to claim 1, wherein the tank body of the heating tank comprises: shell, heat preservation and inner wall.

8. The repair system of claim 1 wherein the heat treatment unit further comprises a temperature sensor disposed inside the heating tank.

9. The repair system of claim 1 wherein the heat treatment unit further comprises a second agitator, the second agitator being controlled by a drive.

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