CN212319719U

CN212319719U - Waste incineration power plant marsh gas is returned and is utilized system

Info

Publication number: CN212319719U
Application number: CN201921220780.5U
Authority: CN
Inventors: 李石锁
Original assignee: Nanjing Great Environmental Engineering Co ltd
Current assignee: Nanjing Great Environmental Engineering Co ltd
Priority date: 2019-07-30
Filing date: 2019-07-30
Publication date: 2021-01-08
Anticipated expiration: 2029-07-30

Abstract

The utility model discloses a waste incineration power plant marsh gas is returned and is utilized system, including the anaerobism water sealed tank that loops through the biogas piping connection, two membrane gas cabinets, pressurization fan and combustor, still include control system, control system includes the host computer, IO module control cabinet, PLC main control cabinet and variable frequency control cabinet, IO module control cabinet is used for controlling two membrane gas cabinets and pressurization fan and with PLC main control cabinet communication connection, the host computer is used for controlling two membrane gas cabinets and pressurization fan to open and stop and show two membrane gas cabinets and pressurization fan running state, pressurization fan is connected with variable frequency control cabinet, last water formula of installing of biogas piping hinders cupping jar and tubular flame arrester, the utility model relates to an operation auxiliary appliances technical field. According to the methane recycling system of the waste incineration power plant, methane enters the double-membrane gas holder, the double-membrane gas holder is matched with the pressurizing fan, and the flow of the methane is controlled through the automatic control system, so that the methane is fully combusted, and the methane utilization benefit is improved.

Description

Waste incineration power plant marsh gas is returned and is utilized system

Technical Field

The utility model relates to a waste incineration equipment technical field specifically is a waste incineration power plant marsh gas recycle system.

Background

After the methane comes out of the anaerobic tank water-sealed tank, the methane enters a steel buffer pressure stabilizing tank after passing through methane anti-tempering equipment, enters methane dehydration equipment to remove most of free water in the methane, enters a methane desulfurization system for desulfurization, and is conveyed to a methane burner of an incinerator through a methane pressurization and pressure stabilizing system for combustion. The whole system is provided with one biogas torch, and when the pressure is too high, the excess biogas is ignited by the torch to be burnt and discharged. The existing biogas combustion utilization system has the defects that the pressure in a biogas pipeline is unstable due to the instability of biogas, and the biogas combustion utilization efficiency is influenced.

SUMMERY OF THE UTILITY MODEL

Technical problem to be solved

The utility model provides a to prior art not enough, the utility model provides a waste incineration power plant marsh gas is returned and is utilized system has solved the not high problem of combustion utilization efficiency of current marsh gas combustion utilization system.

(II) technical scheme

In order to achieve the above purpose, the utility model discloses a following technical scheme realizes: a methane recycling system of a waste incineration power plant comprises an anaerobic water seal tank, a double-membrane gas holder, a pressurizing fan, a burner and a control system, wherein the anaerobic water seal tank, the double-membrane gas holder, the pressurizing fan and the burner are sequentially connected through a methane pipeline;

the control system comprises an upper computer, an I/O module control cabinet, a PLC main control cabinet and a variable frequency control cabinet, wherein the I/O module control cabinet is used for controlling the double-membrane gas cabinet and the pressurizing fan and is in communication connection with the PLC main control cabinet, the upper computer is used for controlling the double-membrane gas cabinet and the pressurizing fan to start and stop and displaying the running states of the double-membrane gas cabinet and the pressurizing fan, and the pressurizing fan is connected with the variable frequency control cabinet.

Preferably, the biogas pipeline is provided with a water-type fire-resistant tank and a tubular fire arrestor.

Preferably, a temperature detector is installed on a nozzle connecting pipe of the burner, and the burner is provided with a cold air blower.

Preferably, a biogas leakage detection device is arranged on the biogas pipeline.

Preferably, the double-membrane gas holder comprises an inner membrane and an outer membrane, the outer membrane is arranged outside the inner membrane, a through hole is formed in the outer membrane, a flange plate is fixedly connected in the through hole, and an organic glass plate is fixedly connected to the outer side of the flange plate.

Preferably, the thickness of the organic glass plate is 8 mm.

Preferably, the combustor is provided with a gas valve bank, and the gas valve bank comprises two pneumatic main valves, a bypass electromagnetic valve manual valve and a bypass electric valve bank.

(III) advantageous effects

The utility model provides a methane recycling system of a waste incineration power plant. The method has the following beneficial effects:

this waste incineration power plant marsh gas is returned and is utilized system, set for pressure controller on the biogas pipeline and measure when pressure reaches the starting pressure, the system starts, open solenoid valve, marsh gas gets into two membrane gas cabinets, two membrane gas cabinet pressure sensor measures pressure, when pressure is less than the setting value, two membrane gas cabinets begin to work, marsh gas pressure air-blower begins to drum gas inwards, marsh gas pressure is big, two membrane gas cabinets begin to exhaust outward, maintain the balance, through automatic control system, control marsh gas flow for marsh gas burning is abundant, improve marsh gas utilization benefit.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is an enlarged view of a portion E of FIG. 1;

fig. 3 is a control schematic diagram of the control system of the present invention.

In the figure: 1-anaerobic water-sealed tank, 2-double-membrane gas holder, 21-inner membrane, 22-outer membrane, 23-flange, 24-organic glass plate, 3-pressure fan, 4-burner, 5-water type fire-resisting tank and 6-tubular fire arrester.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-3, the present invention provides a technical solution: a methane recycling system of a waste incineration power plant comprises an anaerobic water seal tank 1, a double-membrane gas cabinet 2, a pressurizing fan 3 and a burner 4 which are sequentially connected through a methane pipeline, wherein a pressure controller and an electromagnetic valve are arranged on the methane pipeline, the system also comprises a control system, the control system comprises an upper computer, an I/O module control cabinet, a PLC main control cabinet and a variable frequency control cabinet, the I/O module control cabinet is used for controlling the double-membrane gas cabinet 2 and the pressurizing fan 3 and is in communication connection with the PLC main control cabinet, the upper computer is used for controlling the double-membrane gas cabinet 2 and the pressurizing fan 3 to start and stop and displaying the running states of the double-membrane gas cabinet 2 and the pressurizing fan 3, the pressurizing fan 3 is provided with the variable frequency control cabinet, the methane is unstable to be output from the anaerobic water seal tank 1, so that the double-membrane gas cabinet 2 and the burning system are connected in parallel to play roles of stabilizing burning pressure and storing methane, the I/O module control cabinet controls, and the PLC main control cabinet is communicated with the optical fiber. The I/O module control cabinet is provided with a host computer, and the host computer can control the start and stop of the double-film gas holder 2 and the booster fan 3 and display the running states of the double-film gas holder 2 and the booster fan 3. And an independent variable frequency control cabinet is arranged at the booster fan 3 so as to better control the booster fan 3 to start and stop.

The PLC main control cabinet receives flow meter signals, receives pressure sensor signals in front of the combustion engine 4, and controls the combustion engine 4 to start and stop and the cooling fan to start and stop according to the pressure signals. And controlling the start and stop of the emptying valve. The PLC main control cabinet is provided with a host computer which can display the state of the burner 4, the pressurizing fan 3 and the biogas flow running state and can set parameters. The PLC main control cabinet and the PLCI/O control cabinet are communicated through optical fibers.

The biogas pipeline is provided with a water type fire-resistant tank 5 and a tubular fire arrestor 6, a nozzle connecting pipe of the burner 4 is provided with a temperature detector, the burner 4 is provided with a cold air blower to ensure that biogas is not burned and tempered, and the biogas pipeline is also provided with a biogas leakage detection device. If the biogas is leaked, the valve of the biogas pipeline is automatically cut off and an alarm is given out.

The double-membrane gas holder 2 comprises an inner membrane 21, an outer membrane 22 and a bottom membrane, wherein the outer membrane 22 is arranged outside the inner membrane 21, and the outer membrane 22 can continuously bear pressure to keep static pressure balance; the inner membrane 21 is used for storing methane and automatically contracts and expands according to the gas storage amount; the basement membrane tiling is on civil engineering basis for marsh gas is sealed completely in the storage space of inner membrance 21 and basement membrane, is equipped with the through-hole on the adventitia 22, fixedly connected with ring flange 23 in the through-hole, ring flange 23 outside fixedly connected with organic glass board 24, and organic glass board 24 thickness is 8mm, observes 2 internal working conditions of two membrane gas cabinets through organic glass board 24, makes the volume condition in two membrane gas cabinets 2 of understanding at any time.

The double-membrane gas holder 2 is shaped as 3/4 spheres and is fixed on a cement guide rail. The main body is made of specially processed polyester materials, and the double-membrane gas holder 2 consists of an outer membrane 22, an inner membrane 21, a bottom membrane and accessory equipment, has the capability of resisting ultraviolet rays and various microorganisms, is highly fireproof and meets the standard. An airtight space with variable capacity is formed between the inner film 21 and the bottom film for storing methane, and the outer film 22 forms the spherical shape of the storage cabinet. The outer membrane 22 is used for air inlet blower to keep constant pressure, when the methane quantity of the inner membrane 21 is reduced, the outer membrane 22 is used for air inlet by the blower to keep the design pressure of the methane of the inner membrane 21, when the methane quantity is increased, the inner membrane 21 is normally stretched, and the excess air of the outer membrane 22 is discharged by the safety valve, so that the methane pressure is always kept at the required design pressure.

The combustor 4 is provided with a gas valve group, and the gas valve group consists of two pneumatic main valves, a bypass electromagnetic valve manual valve and a bypass electric valve. And a bypass ignition system is installed, so that direct large-flow gas is not allowed to be directly ignited, and explosion and accidents are prevented. When the automatic cleaning device is opened, the two pneumatic main valves are opened firstly, pipeline leakage detection is started, the detection is qualified, leakage is found, the program is automatically stopped to run, the combustor 4 starts cleaning, the igniter starts striking fire, the bypass electromagnetic valve is opened, a small amount of gas comes to ignite, the electric valve is slowly opened after the fire is ignited, and a large amount of gas starts to ignite.

When the pressure is lower than the set value, the double-membrane gas holder 2 starts to work, the methane pressure blower starts to blow gas inwards, the methane pressure is high, the double-membrane gas holder 2 starts to exhaust gas outwards, and balance is maintained. When the pressure in front of the combustor 4 reaches the working pressure, the combustor 4 starts, the booster fan 3 starts, and the rotating speed of the booster fan 3 is controlled by frequency conversion according to the measured pressure of the biogas. After the burner 4 receives a starting command, the fan starts to clean, waste gas is discharged, the igniter starts to ignite, the pneumatic valve is opened, the burner 4 starts to work, and when the pressure cannot be detected, the system can automatically stop and send an alarm. The biogas pipeline is provided with a biogas leakage detection device, and when the biogas leakage is found, the valve of the biogas pipeline is automatically cut off and an alarm is given out. A biogas pipeline leak detector is also arranged in front of the double-membrane gas holder 2. The booster fan 3 is linked with the double-film gas holder 2 to realize automatic combustion and safety protection.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation. The use of the phrase "comprising one of the elements does not exclude the presence of other like elements in the process, method, article, or apparatus that comprises the element.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a waste incineration power plant marsh gas system of utilizing of going back to stove which characterized in that: the anaerobic water-sealed biogas digester comprises an anaerobic water-sealed tank (1), a double-membrane gas holder (2), a booster fan (3) and a burner (4) which are sequentially connected through a biogas pipeline, and further comprises a control system;

the control system comprises an upper computer, an I/O module control cabinet, a PLC main control cabinet and a variable frequency control cabinet, wherein the I/O module control cabinet is used for controlling the double-membrane gas cabinet (2) and the booster fan (3) and is in communication connection with the PLC main control cabinet, the upper computer is used for controlling the double-membrane gas cabinet (2) and the booster fan (3) to start and stop and displaying the running states of the double-membrane gas cabinet (2) and the booster fan (3), and the booster fan (3) is connected with the variable frequency control cabinet.

2. The recycling system of biogas generated in a waste incineration power plant as claimed in claim 1, wherein: and a water-type fire-resistant tank (5) and a tubular fire arrestor (6) are arranged on the methane pipeline.

3. The recycling system of biogas generated in a waste incineration power plant as claimed in claim 2, wherein: and a temperature detector is installed on a nozzle connecting pipe of the combustor (4), and the combustor (4) is provided with a cold air fan.

4. The recycling system of biogas generated in a waste incineration power plant as claimed in claim 3, wherein: and a methane leakage detection device is arranged on the methane pipeline.

5. The recycling system of biogas generated in a waste incineration power plant as claimed in claim 4, wherein: two membrane gas holder (2) are including inner membrance (21) and adventitia (22), inner membrance (21) outside is established in adventitia (22), be equipped with the through-hole on adventitia (22), fixedly connected with ring flange (23) in the through-hole, ring flange (23) outside fixedly connected with organic glass board (24).

6. The recycling system of biogas generated in a waste incineration power plant as claimed in claim 5, wherein: the thickness of the organic glass plate (24) is 8 mm.

7. The recycling system of biogas generated in a waste incineration power plant as claimed in claim 1, wherein: the combustor (4) is provided with a gas valve bank, and the gas valve bank is composed of two pneumatic main valves, a bypass electromagnetic valve manual valve and a bypass electric valve bank.