Device for simulating aerobic pretreatment of stored garbage

Abstract

The reaction tank body is arranged for placing stored garbage for ex-situ aerobic treatment, the temperature probe and the humidity probe are arranged in the reaction tank body, and the weighing device is arranged at the bottom of the outer side of the reaction tank body, so that the temperature, humidity and weight change of the stored garbage are monitored in real time, and the degradation condition is recorded; the gas pretreatment device can adjust physical properties or chemical properties of pumped gas according to actual requirements to meet the air requirements of the stored garbage with different components on aerobic treatment; the tail gas detection device detects the concentration condition of each component in tail gas in real time, the pollutant absorption device finally purifies the tail gas, and the diluted gas pump and the gas mixing cavity are arranged, so that the tail gas concentration is always within the detection concentration range of the gas detector, and the reliability and stability of a detection result are guaranteed; according to the scheme, parameters such as the characteristics and flow of air required by aerobic treatment, the weight of the stock garbage heap, the internal environment of the stock garbage heap and the concentration of each component in tail gas are monitored in real time, so that proper aerobic treatment schemes can be set for different refuse landfills.

Description

TECHNICAL FIELD

[0001] The utility model belongs to ecological environment engineering technical field, concretely relates to a device of simulating stockpiled garbage aerobic pretreatment. BACKGROUND

[0002] Garbage landfill is one of the most widely used solid waste disposal methods in the world, and there are about 1.3 billion tons of stockpiled household garbage in China's sanitary landfill sites, plus about 6 to 8 billion tons of stockpiled garbage in non-standard landfill sites. The stockpiled garbage in the landfill site will produce a large amount of dangerous and harmful gases containing methane, ammonia, hydrogen sulfide and methyl mercaptan after fermentation. At the same time, due to the lack of sufficient oxygen, the degradation efficiency of organic matter in the landfill site is low, which prolongs the degradation period of the garbage. Therefore, people usually use aerobic treatment process, that is, introducing fresh air into the landfill site and extracting landfill gas to change the environment in the garbage pile from anaerobic to aerobic, promote the growth of aerobic microorganisms and accelerate the decomposition of organic matter. This method not only can reduce the generation of harmful gases, but also can shorten the time of garbage degradation and consumption. However, the composition of landfill gas is affected by factors such as stockpiled garbage composition, landfill time, local environment, etc. The change rule of landfill gas composition during aerobic treatment is not clear. If direct aerobic pretreatment is carried out, the optimal aerobic reaction time, reaction interval and air volume cannot be selected, which may cause waste due to excessive aerobic treatment or environmental pollution and safety risk due to insufficient aerobic reaction.

[0003] In view of the above phenomenon and problem, the device for simulating stockpiled garbage aerobic pretreatment is proposed after in-depth research. The device can carry out ex situ aerobic treatment of part of the stockpiled garbage in the landfill site, so as to monitor the parameters during the treatment process, obtain relevant support data, and achieve the effect that appropriate aerobic treatment scheme can be set for different landfill sites. CONTENT OF THE UTILITY MODEL

[0004] In view of the above existing problems, the device for simulating stockpiled garbage aerobic pretreatment is proposed. The device can carry out ex situ aerobic treatment of part of the stockpiled garbage in the landfill site, so as to monitor the parameters during the treatment process, obtain relevant support data, and achieve the effect that appropriate aerobic treatment scheme can be set for different landfill sites.

[0005] In order to achieve the above object, the utility model provides a kind of device for simulating stockpile garbage aerobic pretreatment, including garbage reaction component, aerobic component and tail gas component;The garbage reaction component includes reaction tank body, crushed stone cushion, temperature and humidity monitoring device and weighing device, the crushed stone cushion is laid in the bottom of the reaction tank body, the temperature and humidity monitoring device is provided with temperature probe and humidity probe, the temperature probe and humidity probe are extended to the reaction tank body, and the weighing device is arranged on the bottom of the outside of the reaction tank body;The aerobic component includes air pump, gas pretreatment device, first gas flow controller and air inlet pipe connected in sequence, the tail end of the air inlet pipe extends to the reaction tank body;The tail gas component includes tail gas pipe, tail gas detection device, pollutant absorption device and air draught fan connected in sequence, the tail gas pipe entrance is arranged in the reaction tank body, and the outlet extends to the outside of the reaction tank body, the tail gas detection device includes second gas flow controller, dilution gas pump, third gas flow controller, gas mixing chamber, gas detector, the gas mixing chamber is provided with main air inlet, auxiliary air inlet and gas outlet, the second gas flow controller outlet is connected with the main air inlet, the dilution gas pump, third gas flow controller and auxiliary air inlet are connected in sequence, the gas outlet is provided with main pipeline and branch pipeline, and the gas detector is connected with the branch pipeline;The pollutant absorption device is connected with the main pipeline, and the air draught fan is connected with the outlet of the pollutant absorption device.

[0006] Preferably, the first gas flow controller, second gas flow controller and third gas flow controller each include a gas flow meter for instantaneous gas flow monitoring and cumulative gas flow monitoring, and a gas flow controller for gas flow adjustment.

[0007] Preferably, the gas pretreatment device includes an air conditioning device, which is arranged between the air pump and the first gas flow controller, and has functions of heating, cooling and drying to adjust the physical properties of the gas.

[0008] Preferably, the gas pretreatment device further includes a medicament atomization device, which is arranged between the air conditioning device and the first gas flow controller, and can adjust the chemical properties of the gas by changing the properties of the medicament.

[0009] Preferably, the pollutant absorption device includes a weakly acidic reaction tank, an alkaline reaction tank and an activated carbon adsorption box connected in sequence.

[0010] Preferably, the part of the air inlet pipe arranged in the reaction tank body extends above the crushed stone cushion, and the tail end of the air inlet pipe is uniformly provided with gas injection holes.

[0011] Preferably, a leachate drainage pipe is arranged in the gravel cushion, and the tail end of the leachate drainage pipe penetrates through the side wall of the reaction tank body to form a liquid outlet outside the reaction tank body.

[0012] Preferably, a sealing and heat preservation layer is arranged around the outside of the reaction tank body and the top of the reaction tank body.

[0013] Preferably, the volume of the reaction tank body ranges from 10 cubic decimeters to 10 cubic meters, and the thickness of the gravel cushion ranges from 1 / 20 to 1 / 5 of the height of the reaction tank body.

[0014] Preferably, an online monitoring module is arranged, and the online monitoring module is in communication connection with the first gas flow controller, the second gas flow controller, the third gas flow controller, the temperature and humidity monitoring device, and the gas detector, respectively.

[0015] Compared with the prior art, the device for simulating stock garbage aerobic pretreatment has the advantages that: the garbage reaction assembly is arranged for the placement of stock garbage and aerobic reaction, the aerobic assembly is arranged for providing sufficient air for aerobic treatment to form an aerobic environment, and the tail gas assembly is arranged for real-time monitoring of tail gas pollutant conditions and tail gas purification treatment; the reaction tank body arranged in the garbage reaction assembly is used for placing stock garbage from a garbage landfill site, so as to avoid the interference of complex external conditions and ensure the smooth progress of ex-situ aerobic treatment of stock garbage; the temperature and humidity monitoring device is arranged with a temperature probe and a humidity probe in the stock garbage; the weighing device is arranged at the bottom of the outside of the reaction tank body, is used for real-time monitoring of the temperature and humidity change conditions of the stock garbage in the reaction tank body, and records the weight change and degradation conditions of the stock garbage; the aerobic assembly is provided with a gas pretreatment device, which adjusts the physical properties or chemical properties of the pumped gas according to the actual needs of the aerobic reaction, so as to better cope with the air demand of aerobic treatment of stock garbage with different compositions; the tail gas assembly is provided with a tail gas detection device for real-time detection of the concentration conditions of each component in the tail gas, and a pollutant absorption device for final purification of the tail gas generated by the aerobic reaction; the tail gas detection device is provided with a dilution gas air pump and a gas mixing chamber, so as to reduce the concentration of each component in the tail gas, so that the concentration is always within the detection concentration range of the gas detector, and the reliability and stability of the real-time detection result are ensured; in addition, the first gas flow controller, the second gas flow controller and the third gas flow controller all have the functions of gas flow adjustment, gas instantaneous flow monitoring and gas cumulative flow monitoring, so as to monitor the operation and change conditions of various gases in the device at any time. This scheme can perform ex-situ aerobic treatment on part of the stock garbage in different composition garbage landfills, and can real-time monitor the parameters such as the characteristics and flow of the air required by the aerobic reaction of the whole device, the weight of the stock garbage pile, the environment in the stock garbage pile and the concentration of each component in the tail gas, and provide sufficient related data, so as to set appropriate aerobic treatment schemes for different garbage landfills. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a structure schematic view of the device for simulating stock garbage aerobic pretreatment.

[0017] In the figure: 11 - reaction tank body, 12 - sealing insulation layer, 13 - gravel cushion, 14 - leachate drainage pipe, 15 - liquid outlet, 16 - temperature and humidity measuring instrument, 17 - temperature probe, 18 - humidity probe, 19 - electronic platform scale, 21 - air pump, 22 - gas pretreatment device, 23 - air conditioning equipment, 231 - air heater, 232 - air cooler, 233 - compressed air dryer, 24 - medicament atomization device, 25 - first gas flow controller, 26 - air inlet pipe, 27 - air injection hole, 31 - tail gas pipe, 32 - second gas flow controller, 33 - dilution gas pump, 34 - third gas flow controller, 35 - gas mixing chamber, 36 - gas detector, 37 - pollutant absorption device, 38 - weak acid reaction tank, 39 - alkaline reaction tank, 310 - activated carbon adsorption box, 311 - air suction fan, 4 - stockpiled garbage. DETAILED DESCRIPTION

[0018] To further illustrate the present application, the following will be described in conjunction with the accompanying drawings. It is particularly pointed out that the examples described below are only a part of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0019] Referring to Figure 1 The present embodiment provides a device for simulating stockpiled garbage aerobic pretreatment, which comprises a garbage reaction assembly, an aerobic assembly, a tail gas assembly and an online monitoring module. The online monitoring module is used for integrating data to a computer system to realize the unattended multi-data monitoring function of the device for simulating stockpiled garbage aerobic pretreatment, and is respectively in communication connection with the first gas flow controller 25, the second gas flow controller 32, the third gas flow controller 34, the temperature and humidity monitoring device and the gas detector 36.

[0020] The garbage reaction assembly is used for the placement and aerobic reaction of the stock garbage 4, and comprises a reaction tank body 11, a gravel cushion layer 13, a temperature and humidity monitoring device and a weighing device; a sealing and heat preservation layer 12 is arranged on the outer side, the top and the four sides of the reaction tank body 11, and plays a light shielding and heat preservation role; the gravel cushion layer 13 is laid on the bottom of the reaction tank body 11, the stock garbage 4 is placed on the gravel cushion layer 13, a leachate drainage pipe 14 is arranged in the gravel cushion layer 13, the tail end of the leachate drainage pipe 14 penetrates through the side wall of the reaction tank body 11, a liquid outlet 15 is arranged outside the reaction tank body 11, and the liquid outlet 15 is used for timely removing the liquid remaining in the stock garbage 4 and generated in the subsequent aerobic reaction; the temperature and humidity monitoring device is provided with a temperature probe 17 and a humidity probe 18, the temperature probe 17 and the humidity probe 18 both extend into the stock garbage 4 in the reaction tank body 11, and are used for monitoring the temperature and humidity change of the stock garbage 4 in the reaction tank body 11 in real time; and the weighing device is arranged on the bottom outside the reaction tank body 11, and is used for recording the weight change and degradation of the stock garbage 4 in the reaction tank body 11 in real time.

[0021] In the embodiment, the shape of the reaction tank body 11 can be selected as a cylindrical shape or a square column shape, the volume range is set to 10 cubic decimeters to 10 cubic meters, if the components of the stock garbage 4 are relatively uniform and the size of the garbage is small, a small volume is selected, if the components of the stock garbage 4 are not uniform or the size of the garbage is large, a large volume is selected; the thickness range of the gravel cushion layer 13 is set to 1 / 20 to 1 / 5 of the height of the reaction tank body 11, if the moisture content of the stock garbage 4 is low, the thickness of the cushion layer is selected to be small, if the moisture content of the stock garbage 4 is high, the thickness of the cushion layer is selected to be large; the temperature and humidity monitoring device is set to a temperature and humidity measuring instrument 16, and the weighing device is set to an electronic platform scale 19.

[0022] The aerobic assembly is used to provide sufficient air for aerobic treatment to form an aerobic environment, which comprises air pump 21, gas pretreatment device 22, first gas flow controller 25 and air inlet pipe 26 connected in sequence; the tail end of the air inlet pipe 26 extends into the reaction tank body 11, which is used to input air into the reaction tank body 11 to fully react with the stock garbage 4; the gas pretreatment device 22 comprises air conditioning equipment 23 and medicament atomization device 24, the air conditioning equipment 23 and the medicament atomization device 24 are connected in sequence and arranged between the air pump 21 and the first gas flow controller 25, in this embodiment, the air conditioning equipment 23 is provided with air heater 231, air cooler 232 and compressed air dryer 233, which has the functions of heating, cooling and drying, etc., one or more functions can be selected and started according to actual needs to adjust the physical properties of the gas, the medicament atomization device 24 can adjust the chemical properties of the gas by changing the properties of the medicament according to actual needs; the air pump 21 pumps air into the reaction tank body 11 through the air conditioning equipment 23, medicament atomization device 24, first gas flow controller 25 and finally through the tail end of the air inlet pipe 26, and fully reacts with the stock garbage 4 therein.

[0023] In this embodiment, the part of the air inlet pipe 26 arranged outside the reaction tank body 11 is a real pipe, the part arranged inside the reaction tank body 11 extends to above the crushed stone cushion 13, the tail end of which is a flower pipe with uniformly distributed air injection holes 27, the first gas flow controller 25, the second gas flow controller 32 and the third gas flow controller 34 each comprise a gas flow meter for instantaneous gas flow monitoring and cumulative gas flow monitoring, and a gas flow controller for gas flow adjustment.

[0024] The tail gas assembly is used to monitor the tail gas pollution in real time and to purify the tail gas, which comprises tail gas pipe 31, tail gas detection device, pollutant absorption device 37 and induced draft fan 311 connected in sequence; the inlet of the tail gas pipe 31 is arranged in the reaction tank body 11, and the outlet extends to the outside of the reaction tank body 11, the air in the reaction tank body 11 after aerobic reaction, the tail gas generated by which enters the second gas flow controller 32 through the tail gas pipe 31;

[0025] The tail gas detection device comprises a second gas flow controller 32, a dilution gas air pump 33, a third gas flow controller 34, a gas mixing chamber 35, and a gas detector 36. The gas mixing chamber 35 is provided with a main gas inlet, a secondary gas inlet, and a gas outlet. The outlet of the second gas flow controller 32 is connected to the main gas inlet. The dilution gas air pump 33, the third gas flow controller 34, and the secondary gas inlet are sequentially connected. The gas outlet is provided with a main pipeline and a branch pipeline. The branch pipeline is connected to the gas detector 36. The main pipeline is connected to a pollutant absorption device 37. The tail gas enters the gas mixing chamber 35 through the second gas flow controller 32. A small amount of tail gas enters the gas detector 36 through the branch pipeline for tail gas pollutant concentration detection. If the tail gas concentration is too high to exceed the detection range of the gas detector 36, the dilution gas air pump 33 is started to pump air through the third gas flow controller 34 into the gas mixing chamber 35 to fully mix with the tail gas. The tail gas and air are fully mixed in the gas dilution chamber to form mixed gas. A small amount of mixed gas is extracted through the branch pipeline to the gas detector 36 for detection. According to the flow ratio of the second gas flow controller 32 and the third gas flow controller 34 and the pollutant concentration in the diluted gas, the pollutant concentration in the tail gas can be calculated.

[0026] The tail gas or mixed gas finally enters the pollutant absorption device 37 for removal of pollutants therein to complete purification. The pollutant absorption device 37 can be single or multiple in series. In the embodiment, the pollutants generally mainly include ammonia, hydrogen sulfide, methyl mercaptan, sulfide, and methane. The pollutant absorption device 37 comprises a weakly acidic reaction tank 38, an alkaline reaction tank 39, and an activated carbon adsorption box 310 connected in sequence. The weakly acidic reaction tank 38 is provided with a weakly acidic absorption liquid for removing alkaline pollutants such as ammonia. The alkaline reaction tank 39 is provided with an alkaline absorption liquid for removing acidic pollutants such as hydrogen sulfide. The activated carbon adsorption box 310 is used for removing organic pollutants such as sulfide and mercaptan. In the embodiment, the induced draft fan 311 is used to start to make up the air flow power when the air pump 21 is insufficient, or to simulate the air injection and air extraction process during aerobic treatment.

[0027] In the embodiment, the above is only an example and does not limit the protection scope of the application.

[0028] The utility model provides a device of simulating stock garbage aerobic pretreatment sets up the garbage reaction subassembly for the placement and aerobic reaction of stock garbage, the aerobic assembly for providing sufficient air for aerobic treatment to form the aerobic environment and the tail gas component for real time monitoring tail gas pollutant condition and tail gas purification treatment, the reaction tank body for placing stock garbage from the garbage landfill is arranged in the garbage reaction subassembly, avoids the interference of complex conditions outside, guarantees the smooth progress of stock garbage ectopic aerobic treatment, the temperature and humidity monitoring devices place temperature probe and humidity probe in stock garbage, the weighing arrangement is arranged in the outside bottom of reaction tank body, is used for real time monitoring the temperature and humidity change condition of stock garbage in reaction tank body, records the weight change and degradation condition of stock garbage, the physical property or chemical property of pumped gas is adjusted according to the actual need of aerobic reaction in the aerobic assembly setting gas pretreatment device, so as to better cope with the air demand of stock garbage of different composition for aerobic treatment, the tail gas detection device is arranged in the tail gas component and detects the concentration condition of each component in tail gas in real time, sets up pollutant absorption device and finally purifies the tail gas generated in aerobic reaction, wherein the tail gas detection device passes through setting dilution gas air pump and gas mixing chamber, to reduce the concentration of each component in tail gas, makes its concentration always in the detection concentration range of gas detector, guarantees the reliability and stability of real time detection result, in addition, the first gas flow controller, second gas flow controller and third gas flow controller all have gas flow regulation, gas instantaneous flow monitoring and gas cumulative flow monitoring function, can monitor the operation and change condition of various gases in the device at any time. This scheme can carry out ectopic aerobic treatment to part stock garbage of different composition garbage landfill, and real time monitoring the parameters such as the characteristics and flow of air required by the aerobic reaction of the whole device in this process, the weight of stock garbage heap, the concentration of each component in tail gas and the like, provides sufficient relevant data, so as to set up suitable aerobic treatment scheme for different garbage landfills.

[0029] The above disclosed embodiments are only for introducing the utility model in detail, and cannot limit the range of the utility model, therefore, simple improvement and change made according to the claim application range of the utility model still belongs to the protection range of the utility model.

[0030] The protection range of the utility model should be limited to the range. For ordinary skilled person in the art, still can make a number of improvements and refinements without departing from the spirit and range of the utility model, and these and refinements should be regarded as the protection range of the utility model.

Claims

1. A device for simulating aerobic pretreatment of existing waste, characterized in that, It comprises a garbage reaction assembly, an aerobic assembly and a tail gas assembly. The garbage reaction assembly comprises a reaction tank body, a gravel cushion, a temperature and humidity monitoring device and a weighing device, the gravel cushion is laid on the bottom of the reaction tank body, the temperature and humidity monitoring device is provided with a temperature probe and a humidity probe, both the temperature probe and the humidity probe extend into the reaction tank body, and the weighing device is arranged on the bottom outside the reaction tank body. The aerobic assembly comprises an air pump, a gas pretreatment device, a first gas flow controller and an air inlet pipe connected in sequence, and the tail end of the air inlet pipe extends into the reaction tank body. The tail gas assembly comprises a tail gas pipe, a tail gas detection device, a pollutant absorption device and an air drafter connected in sequence, the inlet of the tail gas pipe is arranged in the reaction tank body, the outlet extends to the outside of the reaction tank body, the tail gas detection device comprises a second gas flow controller, a dilution gas pump, a third gas flow controller, a gas mixing chamber, a gas detector, the gas mixing chamber is provided with a main gas inlet, a secondary gas inlet and a gas outlet, the outlet of the second gas flow controller is connected with the main gas inlet, the dilution gas pump, the third gas flow controller and the secondary gas inlet are connected in sequence, the gas outlet is provided with a main pipeline and a branch pipeline, and the gas detector is connected with the branch pipeline; the pollutant absorption device is connected with the main pipeline, and the air drafter is connected with the outlet of the pollutant absorption device.

2. The device for simulating aerobic pretreatment of stock garbage according to claim 1, characterized in that, The first gas flow controller, the second gas flow controller and the third gas flow controller all comprise a gas flow meter for instantaneous gas flow monitoring and cumulative gas flow monitoring, and a gas flow controller for gas flow adjustment.

3. The device for simulating aerobic pretreatment of stock garbage according to claim 1, characterized in that, The gas pretreatment device comprises an air conditioning device arranged between the air pump and the first gas flow controller, which has the functions of heating, cooling and drying and can be used to adjust the physical properties of the gas.

4. The device for simulating aerobic pretreatment of stock garbage according to claim 3, characterized in that, The gas pretreatment device further comprises a medicament atomization device arranged between the air conditioning device and the first gas flow controller, which can adjust the chemical properties of the gas by changing the properties of the medicament.

5. The device for simulating aerobic pretreatment of stock garbage according to claim 1, characterized in that, The pollutant absorption device comprises a weak acid reaction tank, an alkaline reaction tank and an activated carbon adsorption box connected in sequence.

6. The device for simulating aerobic pretreatment of stock garbage according to claim 1, characterized in that, The part of the air inlet pipe arranged in the reaction tank body extends above the gravel cushion, and the tail end of the air inlet pipe is uniformly provided with air injection holes.

7. The device for simulating aerobic pretreatment of stock garbage according to claim 1, characterized in that, The gravel cushion is provided with a leachate guide pipe, the tail end of the leachate guide pipe penetrates through the side wall of the reaction tank body, and a liquid outlet is arranged outside the reaction tank body.

8. The device for simulating aerobic pretreatment of stock garbage according to claim 1, characterized in that, The periphery and top of the outside of the reaction tank body are wrapped with a sealing and heat preservation layer.

9. The device for simulating aerobic pretreatment of stock garbage according to claim 1, characterized in that, The volume of the reaction tank body ranges from 10 cubic decimeters to 10 cubic meters, and the thickness of the gravel cushion ranges from 1 / 20 to 1 / 5 of the height of the reaction tank body.

10. The device for simulating aerobic pretreatment of stock garbage according to claim 1, characterized in that, An online monitoring module is arranged, which is communicatively connected with the first gas flow controller, the second gas flow controller, the third gas flow controller, the temperature and humidity monitoring device and the gas detector.

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