阅读说明：本技术 一种有机废弃物膜覆盖好氧堆肥微正压气压监测装置 (Organic waste membrane covers good oxygen compost pressure monitoring devices that declines ) 是由 刘洪钧 刘文龙 赵静一 林嘉瑞 刘炜 关靖华 杜蕊 周岩 张顥 于 2021-10-29 设计创作，主要内容包括：一种有机废弃物膜覆盖好氧堆肥微正压气压监测装置,包括堆体,堆体的顶部敷设有覆盖膜,覆盖膜与堆体之间设有气压采集头,气压采集头位于覆盖膜外部一端连接有电控箱,电控箱的内部设有微差压型压力变送器与温度变送器,通过过滤网和五通传入引压管,连接到微差压型压力变送器的进气口高压端,模数转换后的数字信号传输到PLC进行处理；利用堆体与覆盖膜之间堆膜气腔内微正压气压与堆体氧浓度正相关的原理,采用压力传感器替代氧浓度传感器的技术方案,建立堆膜气腔微正压气压-堆体氧浓度数学模型,以微正压气压为监测对象,实现间接监测氧浓度的目的,保证了堆肥监控设备精准稳定运行,大大降低了堆肥监控设备的生产成本,质量可靠,经济适用。(An organic waste film covered aerobic composting micro-positive pressure air pressure monitoring device comprises a pile body, wherein a covering film is laid on the top of the pile body, an air pressure collecting head is arranged between the covering film and the pile body, one end, positioned outside the covering film, of the air pressure collecting head is connected with an electric cabinet, a micro-differential pressure type pressure transmitter and a temperature transmitter are arranged inside the electric cabinet, the micro-differential pressure type pressure transmitter and the temperature transmitter are connected to a high-pressure end of an air inlet of the micro-differential pressure type pressure transmitter through a filter screen and a five-way transmission pressure pipe, and digital signals after analog-to-digital conversion are transmitted to a PLC (programmable logic controller) for processing; the principle that the positive correlation between the micro-positive pressure air pressure in the composting air cavity and the oxygen concentration of the composting body between the composting body and the covering film is utilized, the technical scheme that the pressure sensor replaces an oxygen concentration sensor is adopted, a mathematical model of the micro-positive pressure air pressure-the oxygen concentration of the composting body in the composting air cavity is established, the micro-positive pressure air pressure is taken as a monitoring object, the purpose of indirectly monitoring the oxygen concentration is realized, the accurate and stable operation of composting monitoring equipment is ensured, the production cost of the composting monitoring equipment is greatly reduced, the quality is reliable, and the method is economical and applicable.)

1. The utility model provides an organic waste membrane covers good oxygen compost pressure-fired air pressure monitoring devices, includes heap body (1), its characterized in that, the top of heap body (1) has laid and has covered membrane (2), cover and form heap membrane air cavity (30) under the gas pressure effect between membrane (2) and the heap body (1), be equipped with atmospheric pressure collecting head (3) in the heap membrane air cavity (30), atmospheric pressure collecting head (3) are located and cover outside one end of membrane (2) and are connected with electric cabinet (4), the inside of electric cabinet (4) is equipped with differential pressure type pressure transmitter (5) and temperature transmitter (6).

2. The device for monitoring the micro-positive pressure and air pressure of the aerobic compost covered by the organic waste film as claimed in claim 1, wherein: atmospheric pressure gathering head (3) include stainless steel five-way (10), the cross end department of stainless steel five-way (10) all is equipped with stainless steel filter screen (9), stainless steel five-way (10) are kept away from the one end fixedly connected with of stainless steel filter screen (9) and are drawn pipe (7), the one end that atmospheric pressure gathering head (3) were kept away from in drawing pipe (7) is passed electric cabinet (4) and is connected with differential pressure type pressure transmitter (5) air inlet high pressure end.

3. The device for monitoring the micro-positive pressure and air pressure of the aerobic compost covered by the organic waste film as claimed in claim 1, wherein: the outside of electric cabinet (4) is equipped with PLC (8), PLC (8) are connected with little differential pressure type pressure transmitter (5) and temperature transmitter (6) data line respectively, PLC (8) are connected with the touch-sensitive screen, the model of PLC (8) is S7-1200 CPU 1212C.

4. A micro positive pressure air pressure monitoring device according to claims 1-3, characterized in that: the principle that the micro-positive pressure air pressure in a stack membrane air cavity (30) between a stack body (1) and a covering membrane (2) is positively correlated with the oxygen concentration of the stack body (1) is utilized, and the technical scheme of indirectly detecting the oxygen concentration is adopted for application to oxygen concentration monitoring.

5. The apparatus according to claims 1-4, wherein: the technical scheme of adopting the pressure sensor to replace an oxygen concentration sensor is applied to an organic waste film covered aerobic composting monitoring system.

The technical field is as follows:

the invention belongs to the technical field of harmless treatment and fertilizer utilization of organic wastes, and particularly relates to an aerobic compost micro-positive pressure air pressure monitoring device covered by an organic waste film.

Background art:

according to statistics, the annual organic waste production in China is about 57 hundred million tons, and the harmless treatment and the fertilizer utilization of the organic waste are implemented, so that the environmental pollution is reduced, the waste is changed into valuable, the organic fertilizer is provided for modern ecological agriculture, the film covered aerobic composting technology is a new technology developed in recent years in China, and the film covered aerobic composting technology has obvious comparative advantages in the aspects of the harmless treatment and the resource utilization of the organic waste and is deeply favored by the majority of users.

The aerobic composting covered by the organic waste film is a process of mineralizing and humifying organic matters covered by the covering film in a closed manner by high-temperature fermentation under the action of microorganisms to become thoroughly decomposed composting. In the aerobic composting process, the condition that the compost contains enough oxygen is necessary for aerobic fermentation is ensured, and the oxygen concentration becomes a main index for monitoring the film-covered aerobic composting process by detecting the oxygen concentration of the compost in the film and regulating the operation of an oxygen supply fan. Therefore, the aerobic compost monitoring device needs to have a device which can accurately, stably and reliably acquire and convert the oxygen concentration signal and output a digital signal required by the PLC.

Traditional good oxygen compost supervisory equipment uses oxygen concentration sensor to detect oxygen concentration more, and its core component zirconia probe mostly leans on the import, and is expensive, and does not obey to compost environment "soil and water", and the spoilage is high, directly influences compost supervisory equipment's reliability. The invention realizes the indirect and accurate monitoring of the oxygen concentration in the aerobic composting process by utilizing the principle that the micro-positive pressure air pressure in the composting air cavity between the composting body and the covering film is positively correlated with the oxygen concentration of the composting body and adopting the technical scheme that the pressure sensor replaces the oxygen concentration sensor.

The invention content is as follows:

the invention aims to solve the problems and provide an organic waste film covered aerobic compost micro-positive pressure air pressure monitoring device.

In order to solve the above problems, the present invention provides a technical solution:

the utility model provides an organic waste membrane covers good oxygen compost malleation atmospheric pressure monitoring devices, includes the heap body, the top of heap body has laid the cover film, form the heap membrane air cavity under the gas pressure effect between cover film and the heap body, be equipped with the atmospheric pressure collecting head in the heap membrane air cavity, the atmospheric pressure collecting head is located the outside one end of cover film and is connected with the electric cabinet, the inside of electric cabinet is equipped with differential pressure type pressure transmitter and temperature transmitter.

As a preferred technical scheme, the air pressure collecting head comprises a stainless steel five-way, stainless steel filter screens are arranged at cross-shaped ends of the stainless steel five-way, one end, far away from the stainless steel filter screens, of the stainless steel five-way is fixedly connected with a pressure leading pipe, and one end, far away from the air pressure collecting head, of the pressure leading pipe penetrates through an electric cabinet to be connected with a high-pressure end of an air inlet of the micro-differential pressure type pressure transmitter.

As a preferable technical scheme of the invention, a PLC is arranged outside the electric cabinet, the PLC is respectively and electrically connected with the micro-differential pressure type pressure transmitter and the temperature transmitter, the PLC is connected with a touch screen, and the model of the PLC is S7-1200 CPU 1212C.

As a preferred technical scheme of the invention, the application of the technical scheme of indirectly detecting the oxygen concentration in the oxygen concentration monitoring is adopted by utilizing the principle that the micro-positive pressure air pressure in the stack film air cavity between the stack body and the covering film is positively correlated with the oxygen concentration of the stack body.

As a preferable technical scheme of the invention, the technical scheme of adopting the pressure sensor to replace the oxygen concentration sensor is applied to an organic waste film covered aerobic compost monitoring system.

The invention has the beneficial effects that: the air pressure acquisition head consists of a five-way and 4 filter screens, is placed in a film stacking air cavity between the stack body and the covering film, detects micro-positive pressure air pressure in the film stacking air cavity, transmits the micro-positive pressure air pressure into a pressure leading pipe through the filter screens and the five-way, is connected to the high-pressure end of an air inlet of the micro-differential pressure type pressure transmitter, and transmits digital signals after analog-to-digital conversion to the PLC for processing; the principle that the positive correlation between the micro-positive pressure air pressure in the composting air cavity and the oxygen concentration of the composting body between the composting body and the covering film is utilized, the technical scheme that the pressure sensor replaces an oxygen concentration sensor is adopted, a mathematical model of the micro-positive pressure air pressure-the oxygen concentration of the composting body in the composting air cavity is established, the micro-positive pressure air pressure is taken as a monitoring object, the purpose of indirectly monitoring the oxygen concentration is realized, the accurate and stable operation of composting monitoring equipment is ensured, the production cost of the composting monitoring equipment is greatly reduced, the quality is reliable, and the method is economical and applicable.

Description of the drawings:

for ease of illustration, the invention is described in detail by the following detailed description and the accompanying drawings.

FIG. 1 is a schematic view of a connection structure according to the present invention;

FIG. 2 is a schematic perspective view of an air pressure pick-up head according to the present invention.

In the figure: 1. stacking; 2. covering the film; 3. an air pressure pick-up head; 30. a film stacking air cavity; 4. an electric cabinet; 5. a micro differential pressure type pressure transmitter; 6. a temperature transmitter; 7. a pressure guiding pipe; 8. a PLC; 9. a stainless steel filter screen; 10. stainless steel five-way.

The specific implementation mode is as follows:

as shown in fig. 1-2, the following technical solutions are adopted in the present embodiment: the utility model provides an organic waste membrane covers good oxygen compost pressure-fired air pressure monitoring devices, includes and piles body 1, piles the top of body 1 and has laid and cover membrane 2, covers to be equipped with atmospheric pressure collecting head 3 in the membrane air cavity 30 of piling between membrane 2 and the heap body 1, and atmospheric pressure collecting head 3 is located and covers 2 outside one ends of membrane and is connected with electric cabinet 4, and electric cabinet 4's inside is equipped with differential pressure type pressure transmitter 5 and temperature transmitter 6.

Wherein, the air pressure collecting head 3 comprises a stainless steel five-way 10, the end of the stainless steel five-way 10 is provided with a stainless steel filter screen 9, one end of the stainless steel five-way 10 far away from the stainless steel filter screen 9 is fixedly connected with a pressure leading pipe 7, one end of the pressure leading pipe 7 far away from the air pressure collecting head 3 passes through the electric cabinet 4 to be connected with the high pressure end of the air inlet of the micro-differential pressure type pressure transmitter 5, wherein, the outside of the electric cabinet 4 is provided with a PLC8, a PLC8 is respectively connected with the data line of the micro-differential pressure type pressure transmitter 5 and the temperature transmitter 6, the PLC8 is connected with a touch screen, the PLC8 is S7-1200 CPU1212C, wherein, the pressure leading pipe 7 is made of polytetrafluoroethylene, the gas corrosion of the gas discharged in the aerobic composting process is very high, the pressure leading pipe 7 made of the polytetrafluoroethylene has the characteristic of gas corrosion resistance, and also has the excellent characteristics of high pressure resistance, high temperature resistance and the like, so that the pipeline has better strength, the pipeline durability is improved, the principle that the positive correlation between the micro-positive pressure air pressure in the pile film air cavity 30 and the oxygen concentration of the pile body 1 is realized between the pile body 1 and the covering film 2 is utilized, the technical scheme that the pressure sensor replaces the oxygen concentration sensor is adopted, a function relation mathematical model of the micro-positive pressure air pressure in the pile film air cavity 30 and the oxygen concentration in the pile body 1 is established, micro-positive pressure air pressure signals are processed by the PLC8, the micro-positive pressure air pressure is used as a monitoring parameter to indirectly monitor the oxygen concentration, and the application of the monitoring system for the aerobic composting covered by the organic waste film is realized.

Specifically, the method comprises the following steps: an organic waste membrane covers aerobic compost pressure monitoring device of the pressure, while using, place the pressure gathering head 3 in piling membrane air cavity 30 between body 1 and covering membrane 2 at first, the port of the cross four-way of the stainless steel five-way 10 inserts a stainless steel filter screen 9 respectively, the gas enters the pressure pipe 7 through the stainless steel filter screen 9 and finally enters the air inlet high-pressure end of the differential pressure type pressure transmitter 5 in the electric cabinet 4, is used for gathering the pressure signal of the pressure in the membrane air cavity 30 of piling, change the pressure of the pressure into the digital signal and give PLC8, monitor the pressure range of the pressure in the membrane air cavity 30 of piling is + -200 Pa, the pressure of the high-pressure end of the pressure transmitter of the differential pressure type 5 is fetched when installing, the temperature transmitter 6 in the electric cabinet 4, is used for detecting the ambient temperature outside the body 1 of piling, and output the temperature signal to PLC8, PLC8 starts or shuts off the blower through the executive component, the micro-positive pressure environment of the film stacking air cavity 30 is built, micro-air pressure signals are collected by the beneficial air pressure collecting head 3, for the safety of the sensor, the effect controlled by the PLC8 is slow pressurization and pressure relief, instantaneous high pressure or low pressure is avoided, the transmitter converts collected air pressure and temperature signals into digital signals through the analog-to-digital converter, and the digital signals are displayed through the touch screen.

While there have been shown and described what are at present considered to be the fundamental principles of the invention and its essential features and advantages, it will be understood by those skilled in the art that the invention is not limited by the embodiments described above, which are merely illustrative of the principles of the invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the invention as defined by the appended claims and their equivalents.