Novel thermal desorption treatment and detection combined device

Abstract

The utility model discloses a novel thermal desorption treatment and detection combined device, and belongs to the field of soil pollution treatment. According to the device, thermal desorption treatment and a detection device are connected in series for integrated operation, so that the simplicity and convenience of operation are improved; the conditions that the gas purging is too fast and the flow is too large are improved; an air inlet detection method and a liquid inlet detection method are provided and are suitable for different conditions; the loss of the collected pollutants in the transfer process is reduced, the detection accuracy and credibility are improved, and the method has a relatively good application prospect.

Description

Technical Field

[0001] The utility model belongs to the field of soil thermal desorption in polluted sites, and particularly relates to a new combined device for thermal desorption treatment and detection. Background Art

[0002] In recent years, the problem of soil pollution has become increasingly prominent globally, and China is also facing a severe soil pollution situation. Soil pollution in China mainly stems from various factors such as industrial waste, agricultural pollution, and domestic waste, especially organic pollutants and heavy metal pollution, which pose a serious threat to the ecological environment and human health. Soil pollution not only damages the ecological environment but also poses a serious threat to human health. Heavy metal pollutants can be enriched through the food chain and ultimately enter the human body, leading to various health problems such as liver and kidney damage, nervous system diseases, and cancer. Organic pollutants may enter the human body through skin contact, inhalation through the respiratory tract, etc., causing acute or chronic poisoning.

[0003] In this context, the thermal desorption technology has received increasing attention due to its unique advantages. This technology removes pollutants by heating contaminated soil to a specific temperature, causing the organic pollutants in it to volatilize and decompose. The thermal desorption technology has attracted much attention because it can effectively remove organic pollutants, but the existing thermal desorption devices have problems such as high energy consumption, low treatment efficiency, and complex operation. Therefore, it is urgent to develop a thermal desorption device with high efficiency, low energy consumption, and easy operation.

[0004] Specifically, the existing thermal desorption devices usually consume a large amount of electric energy or fuel during the heating process, which not only increases the operating cost but also imposes an additional burden on the environment. At the same time, due to the limitations of equipment design and operation processes, the existing devices are not efficient in treating contaminated soil, and the post-treatment technology for pollution is not perfect, which is likely to cause secondary pollution. In addition, the complex operation process requires professional technicians for maintenance and operation, increasing the labor cost and operation risk.

[0005] Therefore, it is particularly important to develop a thermal desorption device with high efficiency, low energy consumption, and easy operation. This requires not only a breakthrough in heating technology and the adoption of a more efficient energy utilization method but also innovation in equipment design to make its structure more concise and operation more convenient. At the same time, an intelligent control system is introduced to realize real-time monitoring and optimization adjustment of the repair process through automation and digital means, set up a tail gas treatment device to prevent secondary pollution, and simultaneously link a detection device to detect the concentration of pollutants, thereby greatly improving the application prospect of the thermal desorption technology. Summary of the Utility Model

[0006] The purpose of the utility model is to provide a thermal desorption device that can efficiently and low-energy consume the treatment and detection of organically polluted soil for the above-mentioned existing problems.

[0007] The object of the utility model can be achieved by the following technical solutions:

[0008] A new combined device for thermal desorption treatment and detection, which comprises a furnace body and a gas chromatography - mass spectrometry (GC - MS) instrument. The output end of a gas cylinder is connected to the top of the furnace body through a pipeline. A heater is provided at the bottom of the furnace body, and a heating table is further provided above the heater. One output end of the furnace body is connected to the GC - MS instrument through a valve, and the other output end is connected to the GC - MS instrument through a valve and a tubular condenser in sequence.

[0009] In the technical solution of the utility model: a pressure gauge, a buffer tank and a flowmeter are further provided on the pipeline connecting the gas cylinder and the furnace body.

[0010] In the technical solution of the utility model: several vertically arranged condensing tubes and a horizontally arranged heat exchanger are provided in the tubular condenser.

[0011] In the technical solution of the utility model: several round holes for the passage of air flow are provided at the bottom of the heating table.

[0012] In the technical solution of the utility model: a weighing system is further provided in the heating table.

[0013] In some more specific technical solutions, the parts of the device are as follows:

[0014] A new soil thermal desorption treatment and detection system. The main body of the thermal desorber includes an air inlet, an air outlet and a sealing ring at the top of the furnace body. The elevated heating table can prevent the gas entering from the air inlet from directly blowing and polluting the soil, thus preventing soil dust from flying. The heater, the switch and the display screen on the control console can control the heating temperature and time. After being discharged from the air outlet, there are two options: condensation or directly passing into the detection device.

[0015] Furthermore, before the gas enters the furnace body, the pressure and flow rate of the gas are controlled. A buffer tank equipped with a pressure gauge is provided to slow down the gas flow rate, and at the same time, the flowmeter controls the flow rate.

[0016] Furthermore, the gas entering from the air inlet first reaches the bottom platform of the furnace cavity, and then slowly blows up and down the heating table, reducing the situation of soil dust flying and making the gas blowing more uniform.

[0017] Furthermore, a sealing ring is provided at the opening and closing part of the thermal desorber to reduce the escape of polluted gas. It is ensured that the polluted gas is discharged from the air outlet after heating.

[0018] Furthermore, the furnace body of the thermal desorption system is equipped with a control console provided with a switch and a parameter display.

[0019] Further, the thermal desorption system is connected to a tubular condenser at the exhaust port, which is provided with a condensing pipe and a heat exchange pipe, and a discharge pipe is provided below to discharge the condensed pollutants.

[0020] Further, a gas chromatography-mass spectrometry device is provided after the tubular condenser to detect pollutants.

[0021] Further, the gas chromatography-mass spectrometry instrument is connected to a computer and quickly gives analysis data.

[0022] Further, valves are provided at both the inlet and outlet of the furnace body to control the inlet and outlet of gas.

[0023] In the technical solution of the present utility model, the new soil thermal desorption treatment and detection system is provided with a weighing system to monitor the soil mass loss in real time.

[0024] In the technical solution of the present utility model, the application of the new soil thermal desorption treatment and detection system between soil thermal desorption and detection.

[0025] In the technical solution of the present utility model, the pollutant collection system is connected to a tubular condenser at the exhaust port, which is provided with a condensing pipe and a heat exchange pipe. A discharge pipe is provided below to discharge the condensed pollutants.

[0026] In the technical solution of the present utility model, a discharge pipe is provided below the pollutant collection system to discharge the condensed pollutants.

[0027] In the technical solution of the present utility model, the new soil thermal desorption treatment and detection system is provided with a gas chromatography-mass spectrometry device to detect pollutants.

[0028] In the technical solution of the present utility model, the series-connected gas chromatography-mass spectrometry instrument of the new soil thermal desorption treatment and detection system is connected to a computer and quickly gives analysis data.

[0029] In the technical solution of the present utility model, valves are provided at both the inlet and outlet of the furnace body of the new soil thermal desorption treatment and detection system to control the inlet and outlet of gas.

[0030] In the technical solution of the present utility model, the application of the new soil thermal desorption treatment and detection system between soil thermal desorption and detection.

[0031] The beneficial effects of the present utility model are as follows:

[0032] 1. The utility model is provided with two sets of control systems. One is to set a pressure gauge, a flow meter and a valve in front of the air inlet to control the flow rate, flow and pressure of the purging gas, so as to prevent dust from being raised when purging soil pollutants. The other is that the thermal desorption instrument is equipped with an electric heating control system to control factors such as heating temperature, time, heating rate and soil weight change during the thermal desorption process, making the operation process simpler, controllable and efficient.

[0033] 2. The utility model is provided with a pollutant collection system and a detection system. For volatile pollutants, they can be directly introduced into a gas-phase mass spectrometer connected to a computer to quickly give analysis data. For non-volatile pollutants, they are first introduced into a tubular condenser for condensation operation to collect pollutants, and then introduced into a gas-phase mass spectrometer connected to a computer to give analysis data, making the treatment and operation integrated and simplifying the operation process. Description of the Drawings

[0034] Figure 1 is a new combined device for thermal desorption treatment and detection of the technology of the utility model.

[0035] 1 is a gas cylinder, 2 is a pressure gauge, 3 is a buffer tank, 4 is a flow meter, 5 is a heating table, 6 is a control console, 7 is an air inlet, 8 is an air outlet, 9 is a heater, 10 is a tubular condenser, 11 is an exhaust port, 12 is a gas-phase mass spectrometer, 13 is a furnace body, 14 is a sealing ring, 15 is a power switch, 16 is a parameter display screen, 17 is a condenser tube, 18 is a heat exchanger, 19 is a platform at the bottom of the furnace cavity, 20 is a first valve, 21 is a second valve, 22 is a third valve, 24 is a fourth valve, 25 is a weighing system. Detailed Embodiment

[0036] The following further illustrates the utility model in conjunction with embodiments, but the protection scope of the utility model is not limited thereto:

[0037] As Figure 1 shown, a new combined device for thermal desorption treatment and detection, the device includes a furnace body 13 and a gas-phase mass spectrometer 12. The output end of the gas cylinder 1 is connected to the top of the furnace body 13 through a pipeline. A heater 9 is provided at the bottom of the furnace body 13. Above the heater 9, there is also a heating table 5. One output end of the furnace body 13 is connected to the gas-phase mass spectrometer 12 through a valve, and the other output end is connected to the gas-phase mass spectrometer 12 through a valve and a tubular condenser 10 in sequence.

[0038] A pressure gauge 2, a buffer tank 3 and a flow meter 4 are also provided on the pipeline connecting the gas cylinder 1 and the furnace body 13. The tubular condenser 10 is provided with a plurality of vertically arranged condenser tubes 17 and a horizontally arranged heat exchanger 18.

[0039] The bottom of the heating table 5 is provided with a number of round holes for the passage of air flow. A weighing system 25 is also provided in the heating table 5.

[0040] The tubular condenser 10 mainly includes a condensing tube 17, a heat exchange tube 18 and a discharge port 11. The detection system includes a gas chromatography-mass spectrometry instrument 12. A first valve 20 and a third valve 23 are provided at the air inlet 7 and the air outlet 8 respectively to adjust the air intake and exhaust conditions. The second valve 21 and the third valve 22 control the pollutant collection system and the detection system respectively, and the fourth valve 24 controls the discharge port.

[0041] The specific working process and principle of the present utility model are as follows:

[0042] Turn on the power switch, set the parameters of heating temperature, time and heating rate on the control console, and turn on the heater to preheat the furnace body. The contaminated soil is pretreated and added to the preheated heating table. At the same time, open the gas cylinder and adjust the buffer tank and the flow meter, open the air inlet and air outlet valves. The appropriate flow rate and velocity first reach the bottom of the furnace cavity and then play a buffering role and then purge the contaminated soil on the heating table. Under the action of high temperature, the pollutants are separated from the soil in the form of gas and are carried out by the purging gas and discharged from the air outlet. The present utility model provides two treatment methods after the pollutants are carried out: when the pollutants are highly volatile, open the valve directly connected to the gas chromatography-mass spectrometry instrument and close the valve connected to the condensing tube after the gas is discharged, so that the gas directly enters the detection system; when the pollutants are not highly volatile, open the valve connected to the condensing tube and close the valve directly connected to the gas chromatography-mass spectrometry instrument, so that the pollutants are condensed and collected, and then enter the detection system through the discharge port for detection.

[0043] The above content is for the preferred embodiments of the present utility model, and does not impose any formal restrictions on the present utility model. Although the present utility model has been shown as above in the preferred embodiments, it is not used to limit other uses of the present utility model. Any person skilled in the art can make some changes or modifications into equivalent embodiments by using the above-disclosed technical content within the scope of the technical solution of the present utility model. Any equivalent changes and modifications made to the above embodiments based on the technical essence of the present utility model and any simple modifications still fall within the scope of the technical solution of the present utility model.

[0044] It should be noted that the structures, proportions, sizes, etc. shown in the drawings of this specification are only used to cooperate with the content disclosed in the specification for those who are familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present utility model. Therefore, they do not have technical essence. Any modification of the structure, change of the proportional relationship or adjustment of the size, without affecting the effects that the present utility model can produce and the purposes that can be achieved, should still fall within the scope that can be covered by the technical content disclosed in the present utility model.

Claims

1. A novel combined device for thermal desorption treatment and detection, characterized in that: The device includes a furnace body (13) and a gas chromatography-mass spectrometry (GC-MS) instrument (12). The output end of the gas cylinder (1) is connected to the top of the furnace body (13) through a pipeline. A heater (9) is provided at the bottom of the furnace body (13), and a heating table (5) is further provided above the heater (9). One output end of the furnace body (13) is connected to the GC-MS instrument (12) through a valve, and the other output end is connected to the GC-MS instrument (12) through a valve and a tubular condenser (10) in sequence.

2. The novel combined device for thermal desorption treatment and detection according to claim 1, wherein: A pressure gauge (2), a buffer tank (3) and a flowmeter (4) are also provided on the pipeline connecting the gas cylinder (1) and the furnace body (13).

3. The novel thermal desorption treatment and detection combined device according to claim 1, wherein: The tubular condenser (10) is provided with a number of vertically arranged condenser tubes (17) and a horizontally arranged heat exchanger (18).

4. The novel combined device for thermal desorption treatment and detection according to claim 1, wherein: The bottom of the heating table (5) is provided with a number of round holes for the passage of air flow.

5. The novel combined device for thermal desorption treatment and detection according to claim 1, characterized in that: A weighing system (25) is also provided in the heating table (5).

Images