阅读说明：本技术 一种餐厨垃圾浆液提油方法及控制装置 (Kitchen waste slurry oil extraction method and control device ) 是由 杨东兴 白金玉 崔天鑫 张成波 杨建军 王伟礼 刘霄 刘梦航 张宏升 李江 于 2021-04-29 设计创作，主要内容包括：一种餐厨垃圾浆液提油方法及控制装置,属于粪餐厨垃圾提油技术领域。主电机变频器连接第一电机,辅电机变频器连接第二电机,主电机变频器之间辅电机变频器通过变频器共直流母线间隔离开关熔断器连接,进料泵通过温度传感器、流量计连接设备腔体,设备腔体分别连接第一电机及第二电机。本发明产生的有益效果是：由于餐厨垃圾浆液成分较复杂,常见提油效果不佳或无法提油。大大提升餐厨垃圾浆液提油效果,提高生产效率,缩短产品生产周期；具有可靠性高,维护简单,性能稳定,操作安全等特点。(A kitchen waste slurry oil extraction method and a control device belong to the technical field of excrement kitchen waste oil extraction. The main motor frequency converter is connected with the first motor, the auxiliary motor frequency converter is connected with the second motor, the auxiliary motor frequency converters between the main motor frequency converters are connected with the switch fuse at intervals of a common direct current bus of the frequency converters, the feeding pump is connected with an equipment cavity through the temperature sensor and the flowmeter, and the equipment cavity is respectively connected with the first motor and the second motor. The invention has the following beneficial effects: due to the complex components of the kitchen waste slurry, the common oil extraction effect is poor or the oil extraction cannot be realized. The oil extraction effect of the kitchen waste slurry is greatly improved, the production efficiency is improved, and the production period of the product is shortened; the device has the characteristics of high reliability, simple maintenance, stable performance, safe operation and the like.)

1. The utility model provides a kitchen garbage thick liquid carries oil controlling means which characterized in that main motor converter connects first motor, assists the motor converter to connect the second motor, assists the motor converter between the main motor converter to pass through the converter and divide the interval of direct current generating line to leave to close the fuse to connect, and the charge pump passes through temperature sensor, flowmeter jointing equipment cavity, and first motor and second motor are connected respectively to the equipment cavity.

2. A method for extracting oil from kitchen waste slurry is characterized by comprising the following frequency conversion control steps: the two frequency converters are driven by a belt in the working process, the auxiliary motor is always in a power generation state after the auxiliary motor is started, and electric energy flows to the main motor through a direct current bus to be consumed;

also comprises the step of feeding amount of kitchen waste slurry: the feeding amount of the kitchen waste slurry is controlled by adopting a PID (proportion integration differentiation) closed-loop automatic control method between the feeding amount of the feeding pump and the instantaneous flow of the flow meter, and the feeding amount is controlled to be 8T/h, so that the aim of reasonable and stable feeding amount is fulfilled;

also comprises a cleaning step and a working step:

cleaning, namely controlling the rotating speed of a frequency converter of a main motor to be 240r/m and controlling the rotating speed of a frequency converter of an auxiliary motor to be 300r/m after PLC calculation;

the working steps are as follows: after the PLC calculation, the rotating speed of the frequency converter of the main motor is controlled to 1050r/m, and the rotating speed of the frequency converter of the auxiliary motor is controlled to 1350 r/m;

working flow, when the temperature sensor detects that the kitchen waste slurry is 70-80 ℃, the oil extraction method automatically starts the machine under the condition, and enters a cleaning step, wherein the cleaning step works for 15 minutes and then enters a working step; starting the feeding amount of the kitchen waste slurry in the working process of the working steps;

and when the temperature sensor detects that the kitchen waste slurry is less than 70 ℃ or more than 80 ℃, stopping feeding amount of the kitchen waste slurry, and stopping working after 15 minutes.

3. The method for extracting the oil from the slurry of the kitchen waste according to claim 2, wherein the step of controlling the frequency converter is rotating speed control, and the time for acceleration and deceleration is 1800 seconds.

Technical Field

The invention relates to a kitchen waste slurry oil extraction method and a control device, and belongs to the technical field of excrement kitchen waste oil extraction.

Background

The kitchen waste is waste generated in daily life of residents, and comprises discarded vegetable leaves, leftovers, fruit peels, eggshells, tea residues, bones and the like, and is mainly sourced from household kitchens, restaurants, dining halls, markets and other industries related to food processing. The kitchen waste contains extremely high moisture, grease, organic matters, impurities and the like, and is easy to decay and generate stink if not properly treated and processed. The mainstream direction of harmless treatment of the kitchen at the present stage is in the technical field of biogas production by combining anaerobic fermentation. In a process system for producing biogas by combined anaerobic fermentation, the oil extraction of the kitchen waste slurry is very important. And separating the kitchen organic slurry and the kitchen grease after the oil extraction of the kitchen waste slurry. After the organic slurry is subjected to oil extraction, the degradation period of the oil in the anaerobic fermentation process is reduced, and the activity of methanogens and the stability of an anaerobic fermentation system are improved. The separated grease part can be used for preparing biofuel, and a part of economic profit is generated for production enterprises.

The common kitchen waste slurry oil extraction device has poor oil extraction effect, and the practical analysis can be carried out to obtain the following reasons: the main motor and the auxiliary motor of the kitchen waste slurry oil extraction device are mutually dragged to generate regenerated electric energy for treatment. The kitchen waste slurry feeding amount is reasonably and stably controlled in the oil extraction process of the kitchen waste slurry. The influence of the rotating speed control of the main motor and the auxiliary motor of the kitchen waste slurry oil extraction device on the oil extraction effect. The influence of the temperature of the kitchen waste slurry on the oil extraction effect of the slurry oil extraction device.

Disclosure of Invention

In order to overcome the defects of the prior art, the invention provides a method and a device for extracting oil from kitchen waste slurry and a method and a device for separating solid and liquid of excrement.

A kitchen waste slurry oil extraction control device comprises a main motor frequency converter, an auxiliary motor frequency converter, a fuse protector, a feeding pump, a temperature sensor and a flowmeter, wherein the main motor frequency converter is connected with a first motor, the auxiliary motor frequency converter is connected with a second motor, the auxiliary motor frequency converter is connected with the fuse protector through a frequency converter and a common direct current bus at intervals, the feeding pump is connected with a device cavity through the temperature sensor and the flowmeter, and the device cavity is respectively connected with the first motor and the second motor.

A method for extracting oil from kitchen waste slurry comprises the following frequency conversion control steps: the two frequency converters are driven by a belt in the working process, the auxiliary motor is always in a power generation state after the auxiliary motor is started, and electric energy flows to the main motor through a direct current bus to be consumed;

also comprises the step of feeding amount of kitchen waste slurry: the feeding amount of the kitchen waste slurry is controlled by adopting a PID (proportion integration differentiation) closed-loop automatic control method between the feeding amount of the feeding pump and the instantaneous flow of the flow meter, and the feeding amount is controlled to be 8T/h, so that the aim of reasonable and stable feeding amount is fulfilled;

also comprises a cleaning step and a working step:

and a cleaning step, namely after the PLC calculation, controlling the rotating speed of the frequency converter of the main motor at 240r/m and controlling the rotating speed of the frequency converter of the auxiliary motor at 300 r/m.

The working steps are as follows: after the PLC calculation, the rotating speed of the frequency converter of the main motor is controlled to 1050r/m, and the rotating speed of the frequency converter of the auxiliary motor is controlled to 1350 r/m.

And the working process is that when the temperature sensor detects that the kitchen waste slurry is at 70-80 ℃, the oil extraction method automatically starts the machine under the condition that the machine is met and enters the cleaning step, and the cleaning step works for 15 minutes and then enters the working step. Working steps and starting the feeding amount of the kitchen waste slurry in the working process.

And when the temperature sensor detects that the kitchen waste slurry is less than 70 ℃ or more than 80 ℃, stopping feeding amount of the kitchen waste slurry, and stopping working after 15 minutes.

The frequency converter control step is set as rotation speed control, and the acceleration and deceleration time is 1800 seconds.

The invention has the following beneficial effects: due to the complex components of the kitchen waste slurry, the common oil extraction effect is poor or the oil extraction cannot be realized. The oil extraction effect of the kitchen waste slurry is greatly improved, the production efficiency is improved, and the production period of the product is shortened; the device has the characteristics of high reliability, simple maintenance, stable performance, safe operation and the like. The method has the advantages of no need of increasing any hardware cost, simple program, convenient maintenance and strong operability. The invention adopts a full-automatic working process, and has good and stable oil extraction effect. In the original oil extraction process of kitchen waste slurry, manual operation of post setting is needed to control the flow rate of the kitchen waste slurry and the rotating speed of a main motor and an auxiliary motor related to the temperature of material slurry. The oil extraction effect is not good and the labor intensity is large. The invention cancels post setting labor, reduces the frequency of safety accidents and the labor cost, and improves the production efficiency.

Drawings

A more complete appreciation of the invention and many of the attendant advantages thereof will be readily obtained as the same becomes better understood by reference to the following detailed description when considered in connection with the accompanying drawings, wherein the accompanying drawings are included to provide a further understanding of the invention and form a part of this specification, and wherein the illustrated embodiments of the invention and the description thereof are intended to illustrate and not limit the invention, as illustrated in the accompanying drawings, in which:

fig. 1 is a schematic diagram of a structure of a multi-drive common dc bus using a frequency converter according to the present invention.

Fig. 2 is a schematic structural diagram of the present invention.

The invention is further illustrated with reference to the following figures and examples.

Detailed Description

It will be apparent that those skilled in the art can make many modifications and variations based on the spirit of the present invention.

As used herein, the singular forms "a", "an", "the" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. It will be understood that when an element, component or section is referred to as being "connected" to another element, component or section, it can be directly connected to the other element or section or intervening elements or sections may also be present. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art.

The following examples are further illustrative in order to facilitate the understanding of the embodiments, and the present invention is not limited to the examples.

Example 1: as shown in fig. 1 and 2, in the kitchen waste slurry oil extraction device, a main motor frequency converter 1 is connected with a first motor, an auxiliary motor frequency converter 2 is connected with a second motor, the auxiliary motor frequency converters 2 between the main motor frequency converters 1 are connected with an isolation switch fuse 3 between the frequency converters and a direct current bus, a feeding pump 4 is connected with an equipment cavity through a temperature sensor 5 and a flowmeter 6, and the equipment cavity is respectively connected with a first motor 8 and a second motor 7.

The kitchen waste slurry oil extraction device has the advantages that a main motor and an auxiliary motor of the kitchen waste slurry oil extraction device are mutually dragged to generate a regenerated electric energy treatment problem: the scheme of adopting a frequency converter to drive a common DC bus is shown in figure 1.

Example 2: as shown in fig. 1 and 2, the feed pump 4 is connected to the equipment chamber through a temperature sensor 5 and a flow meter 6, and the equipment chamber is connected to a main motor 8 and an auxiliary motor 7, respectively. Delivering the kitchen waste slurry to oil extraction equipment through a feeding pump for oil extraction.

A method for extracting oil from kitchen waste slurry comprises the following frequency conversion control steps: the two frequency converters are driven by a belt in the working process, and the auxiliary motor is always in a power generation state after the starting is finished. The electric energy flows to the main motor through the direct current bus to perform energy consumption. The starting function of the isolating switch fuse is that the direct current bus is quickly fused after overcurrent, so that the frequency converter is protected. The control mode of the frequency converter is set to be rotation speed control, and the acceleration and deceleration time is 1800 seconds.

Also comprises the step of feeding amount of kitchen waste slurry: and the feeding amount of the kitchen waste slurry is controlled by adopting a PID (proportion integration differentiation) closed-loop automatic control method between the feeding amount of the feeding pump and the instantaneous flow of the flow meter, and the feeding amount is controlled to be 8T/h, so that the aim of reasonable and stable feeding amount is fulfilled.

Also comprises a cleaning step and a working step.

And a cleaning step, namely after the PLC calculation, controlling the rotating speed of the frequency converter of the main motor at 240r/m and controlling the rotating speed of the frequency converter of the auxiliary motor at 300 r/m.

The working steps are as follows: after the PLC calculation, the rotating speed of the frequency converter of the main motor is controlled to 1050r/m, and the rotating speed of the frequency converter of the auxiliary motor is controlled to 1350 r/m.

The working process is that when the temperature sensor detects that the kitchen waste slurry is 70-80 ℃, the automatic starting condition of the kitchen waste slurry oil extraction method is met, the cleaning step is carried out, and the working step is carried out after the cleaning step works for 15 minutes. Working steps and starting the feeding amount of the kitchen waste slurry in the working process.

And when the temperature sensor detects that the kitchen waste slurry is less than 70 ℃ or more than 80 ℃, stopping feeding amount of the kitchen waste slurry, and stopping working after 15 minutes.

Example 3: a method for extracting oil from kitchen waste slurry comprises the following steps: the best oil extraction effect interval of the oil extraction device: 70-80 ℃.

The temperature change range of the kitchen waste slurry is 70-80 ℃ in the heating process. Temperature changes have a severe impact on the oil extraction effect.

The program is set as follows:

step 1, controlling the rotating speed of a main motor frequency converter to 1050r/m and the rotating speed of an auxiliary motor frequency converter to 1350r/m at 70-72 ℃.

And 2, controlling the rotating speed of the frequency converter of the main motor to 1060r/m and the rotating speed of the frequency converter of the auxiliary motor to 1360r/m at 72-74 ℃.

And 3, controlling the rotating speed of the frequency converter of the main motor to 1070r/m and the rotating speed of the frequency converter of the auxiliary motor to 1370r/m at 74-76 ℃.

And 4, controlling the rotating speed of the frequency converter of the main motor to be 1080r/m and the rotating speed of the frequency converter of the auxiliary motor to be 1380r/m at 76-78 ℃.

And 5, controlling the rotating speed of the frequency converter of the main motor to 1090r/m and the rotating speed of the frequency converter of the auxiliary motor to 1390r/m at 78-80 ℃.

And 6, automatically stopping feeding by a feeding pump at the temperature of more than or equal to 80 ℃ or less than or equal to 70 ℃.

The devices are all monitored by a PLC and controlled by a program, and a human-computer interface HMI displays the real-time state and gives an alarm.

As described above, although the embodiments of the present invention have been described in detail, it will be apparent to those skilled in the art that many modifications are possible without substantially departing from the spirit and scope of the present invention. Therefore, such modifications are also all included in the scope of protection of the present invention.