CN218494995U

CN218494995U - Reheating system of external methane furnace of waste incineration disposal power station

Info

Publication number: CN218494995U
Application number: CN202221746099.6U
Authority: CN
Inventors: 夏积恩; 陈翔; 李海疆
Original assignee: China United Engineering Corp Ltd
Current assignee: China United Engineering Corp Ltd
Priority date: 2022-07-08
Filing date: 2022-07-08
Publication date: 2023-02-17
Anticipated expiration: 2032-07-08

Abstract

The utility model relates to a reheating system of an external methane furnace of a waste incineration disposal power station, which belongs to the field of methane disposal. The utility model discloses a landfill leachate treatment station, marsh gas storage holder, marsh gas booster fan, combustion fan, marsh gas burns burning furnace, waste incinerator-exhaust-heat boiler over heater, the condenser, condensate pump, the oxygen-eliminating device, boiler feed pump and chimney, landfill leachate treatment station and marsh gas storage holder are connected, marsh gas storage holder and marsh gas booster fan are connected, marsh gas booster fan and marsh gas burn burning furnace and connect, combustion fan and marsh gas burn burning furnace and connect, condenser and condensate pump are connected, condensate pump and oxygen-eliminating device link to each other, oxygen-eliminating device and boiler feed pump link to each other, boiler feed pump and waste incinerator-exhaust-heat boiler over heater link to each other, waste incinerator-exhaust-heat boiler over heater, marsh gas burns burning furnace and links to each other with the chimney respectively. The utility model discloses satisfy the requirement of environmental protection, possess characteristics such as the security of abundant, the high-efficient utilization of energy and operation.

Description

Reheating system of external methane furnace of waste incineration disposal power station

Technical Field

The utility model relates to a reheat system especially relates to a reheat system of external marsh gas stove of msw incineration processing power station, and it belongs to the marsh gas processing field of msw incineration processing power station.

Background

At present, the following problems exist in the methane disposal of domestic waste incineration disposal power stations: 1) The biogas is a byproduct of a landfill leachate treatment station, and is generally treated by torch combustion or direct burning in a furnace. Energy waste is caused by disposing the methane through torch combustion; 2) The burning of the marsh gas in the furnace is a common marsh gas disposal mode, and the energy can be effectively utilized. The disadvantages that the burning of the methane in the furnace can cause the problems of coking and the like caused by the local overtemperature of the waste heat boiler; due to the limitation of the heat capacity of the waste heat boiler, the heat generated by the increased methane entering the boiler and incinerating can extrude the upstream waste incineration treatment amount, so that the waste incineration treatment amount can not reach the standard, and the economic benefit of a power station is further influenced.

At present, the reheating mode of domestic waste incineration disposal power stations has the following problems: 1) Compared with a non-reheat unit, the reheat unit can improve efficiency, and the reheat mode can be divided into furnace reheating and furnace reheating according to whether a reheater is arranged in a waste heat boiler. The reheater is arranged in a flue of the waste heat boiler in the furnace, so that more corrosive gas, mainly chloride, is generated after the household garbage is incinerated, and the reheater has safety problems of high-temperature corrosion and the like. The reheater adopts modes such as surfacing welding and the like, so that the complexity of the waste heat boiler is increased and the investment amount is increased relatively. The outlet temperature of a domestic in-furnace reheat reheater does not exceed 450 ℃; 2) The reheater of the external reheating mode is arranged outside the flue, so that safety problems such as high-temperature corrosion are avoided, but saturated steam of a waste heat boiler steam pocket or extraction steam of a steam turbine is adopted to heat low-temperature reheating steam, the temperature of the reheating steam is increased limitedly, and compared with the reheating economical efficiency in the furnace, the reheating method is poor.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome the above-mentioned not enough that exists among the prior art, and provide a structural design reasonable, reliable and stable, avoided the reheater high temperature corrosion of interior reheat mode of stove and the not high problem of outside stove reheat unit economic nature, satisfy the requirement of environmental protection, possess the reheating system of the external marsh gas stove of waste incineration disposal power station of characteristics such as abundant, the high-efficient utilization of energy and security of operation.

The utility model provides a technical scheme that above-mentioned problem adopted is: this reheating system of external methane stove of waste incineration processing power station, including a methane pipeline, no. two methane pipelines, no. three methane pipelines, no. four air pipelines, no. five main steam pipeline, no. six low temperature reheat pipelines, no. seven high temperature reheat pipelines, no. eight condensate pipe way, no. nine condensate pipe way, no. ten water supply pipeline, no. eleven water supply pipeline, no. twelve flue gas pipeline and No. thirteen flue gas pipeline, its characterized in that: the system comprises a garbage leachate treatment station, a methane storage cabinet, a methane booster fan, a combustion fan, a methane incinerator, a garbage incinerator-exhaust heat boiler superheater, a steam turbine high-pressure cylinder, a reheater, a steam turbine medium-low pressure cylinder, a generator, a condenser, a condensate pump, a deaerator, a boiler water supply pump and a chimney.

Preferably, the utility model discloses still include isolation valve one and isolation valve two, install isolation valve one, isolation valve two on No. two methane pipes.

As preferred, the utility model discloses still include isolation valve three, isolation valve four and pneumatic quick isolation valve, install isolation valve three, isolation valve four and pneumatic quick isolation valve on No. three marsh gas pipelines.

As preferably, the utility model discloses still include isolation valve five and isolation valve six, install isolation valve five and isolation valve six on the No. eight condensate lines.

Preferably, the utility model discloses still include isolating valve seven and isolating valve eight, install isolating valve seven and isolating valve eight on the No. nine condensate line.

Preferably, the utility model discloses still include isolator nine and isolator ten, install isolator nine and isolator ten on the ten water supply line.

Preferably, the utility model discloses still include isolation valve eleven and isolation valve twelve, install isolation valve eleven and isolation valve twelve on the No. eleven feed water pipeline.

Preferably, the number of the condensed water pumps is two, and 1 is used for standby in normal operation; two boiler water feeding pumps are provided, and 1 is used for standby during normal operation; the number of the biogas booster fans is two, and the biogas booster fan 1 is used for standby in normal operation.

Preferably, the low pressure cylinder in the steam turbine links to each other with generator, condenser respectively.

Compared with the prior art, the utility model, filled marsh gas and burned rational utilization and high-efficient reheating system's blank, had following advantage and effect: (1) The whole system is reasonable in design, stable and reliable, the reasonable utilization of the methane incineration and the efficient reheating system are combined, the methane is treated by the external independent methane incinerator, the methane does not enter the incinerator, the garbage incineration treatment capacity is more stable, the operation of the waste heat boiler is safer, and the problems of local over-temperature and the like of the waste heat boiler caused by the fact that the methane enters the incinerator and is incinerated are avoided; (2) A reheater is arranged in the methane incinerator, heat energy generated by methane combustion is fully and effectively utilized, the heat energy is used for heating reheated steam, the methane incineration temperature is high, the temperature rise of the reheated steam can be greatly improved, and the outlet temperature of the reheater is allowed to exceed 450 ℃; (3) The system avoids the problems of high-temperature corrosion of a reheater in an in-furnace reheating mode and low economical efficiency of an out-furnace reheating unit; the system ensures the safe and reliable operation of various devices, simultaneously makes full use of the energy of methane incineration and adopts a high-temperature and high-efficiency reheating scheme, so that the efficiency of the unit is improved, and the benefit of the power station is increased.

Drawings

Fig. 1 is a schematic structural diagram of the overall system according to the embodiment of the present invention.

In the figure: the system comprises a landfill leachate treatment station 1, a biogas storage cabinet 2, a biogas booster fan 3, a combustion fan 4, a biogas incinerator 5, a garbage incinerator-waste heat boiler superheater 6, a turbine high-pressure cylinder 7, a reheater 8, a turbine medium-low pressure cylinder 9, a generator 10, a condenser 11, a condensate pump 12, a deaerator 13, a boiler feed pump 14 and a chimney 15; the system comprises an isolation valve I16, an isolation valve II 17, an isolation valve III 18, an isolation valve IV 19, a pneumatic quick isolation valve 20, an isolation valve V21, an isolation valve VI 22, an isolation valve VII 23, an isolation valve VIII 24, an isolation valve VII 25, an isolation valve VII 26, an isolation valve VII 27 and an isolation valve VII 28; the first methane pipeline L01, the second methane pipeline L02, the third methane pipeline L03, the fourth air pipeline L04, the fifth main steam pipeline L05, the sixth low-temperature reheating pipeline L06, the seventh high-temperature reheating pipeline L07, the eighth condensed water pipeline L08, the ninth condensed water pipeline L09, the tenth water pipeline L010, the eleventh water pipeline L011, the twelfth smoke pipeline L012 and the thirteenth smoke pipeline L013.

Detailed Description

The present invention will be described in further detail below with reference to the accompanying drawings by way of examples, which are illustrative of the present invention and are not intended to limit the present invention.

Examples

Referring to fig. 1, the reheating system of the external methane furnace of the waste incineration disposal power station of the embodiment includes a landfill leachate treatment station 1, a methane gas storage cabinet 2, a methane booster fan 3, a combustion fan 4, a methane incinerator 5, a waste incinerator-waste heat boiler superheater 6, a steam turbine high pressure cylinder 7, a reheater 8, a steam turbine medium and low pressure cylinder 9, a generator 10, a condenser 11, a condensate pump 12, a deaerator 13, a boiler feed pump 14 and a chimney 15, wherein the landfill leachate treatment station 1 and the methane gas storage cabinet 2 are connected through a first methane pipeline L01, the methane gas storage cabinet 2 and the methane booster fan 3 are connected through a second methane pipeline L02, the methane booster fan 3 and the methane incinerator 5 are connected through a third methane pipeline L03, the combustion fan 4 and the methane incinerator 5 are connected through a fourth methane pipeline L04, the waste incinerator-waste heat boiler superheater 6 and the steam turbine high pressure cylinder 7 are connected through a fifth main steam pipeline L05, the steam incinerator high pressure cylinder 7 and the steam turbine low temperature reheater 8 are connected through a sixth condensate superheater L06, the reheater 8 and the steam turbine reheater 9 are connected through a seventh high temperature reheater pipeline L07, the waste incinerator-waste heat boiler superheater 6 and the twelfth steam turbine high pressure cylinder 9 are connected through a twelfth condensate pump 13 and a twelfth steam pipe 13-12, the twelfth condensate pump 13, the ninth boiler pump 13 and the twelfth steam pump 13 are connected through a ninth boiler 13-twelfth steam supply pipeline 14, the twelfth condensate pump 14 and the twelfth steam pump 13-twelfth condensate pump 011, the twelfth condensate pump 13 and the ninth boiler 13 are connected through a ninth boiler 13-twelfth condensate pump, and the ninth boiler 9, and the ninth boiler 13.

In this embodiment, a first isolation valve 16 and a second isolation valve 17 are installed on a second methane pipeline L02, a third isolation valve 18, a fourth isolation valve 19 and a pneumatic quick isolation valve 20 are installed on a third methane pipeline L03, a fifth isolation valve 21 and a sixth isolation valve 22 are installed on an eighth condensed water pipeline L08, a seventh isolation valve 23 and an eighth isolation valve 24 are installed on a ninth condensed water pipeline L09, a ninth isolation valve 25 and a tenth isolation valve 26 are installed on a tenth water pipeline L010, and a eleventh isolation valve 27 and a twelfth isolation valve 28 are installed on a eleventh water pipeline L011.

The waste incinerator-waste heat boiler superheater 6 in the embodiment is arranged in the waste heat boiler; the reheater 8 is built in the biogas incinerator 5.

The number of the condensate pumps 12 in the embodiment is two, and 1 is used for standby in normal operation; two boiler feed pumps 14 are provided, and 1 is used for standby in normal operation; the number of the biogas booster fans 3 is two, and the biogas booster fans 1 are used for standby in normal operation.

When the garbage leachate treatment station operates normally, the garbage leachate treatment station 1 stores biogas in the biogas storage cabinet 2 through the first pipeline L01. And (3) starting the methane booster fan (3) (1 of the methane booster fans, and the other 1 of the methane booster fans are in hot standby), opening the isolation valve I (16), the isolation valve II (17), the isolation valve III (18), the isolation valve IV (19) and the pneumatic quick isolation valve (20), and conveying the methane of the methane storage cabinet (2) to the methane incinerator (5) through the methane pipeline II (L02) and the methane booster fan (3) after being pressurized. Meanwhile, the combustion fan 4 conveys combustion air to the biogas incinerator 5 through a fourth pipeline L04. Biogas and air are mixed and combusted in the biogas incinerator 5, heat is absorbed by a reheater 8 arranged in the biogas incinerator 5, and cooled flue gas is exhausted to the atmosphere through a No. thirteen flue gas pipeline L013 and a chimney 15.

The garbage incinerator-waste heat boiler normally operates, water is heated and fed, and the cooled flue gas is discharged to the atmosphere through a No. twelve flue gas pipeline L012 and a chimney 15. The feed water is heated to superheated steam, and works through the outlet of the superheater 6 and the fifth main steam pipeline L05 to the high-pressure cylinder 7 of the steam turbine. The steam after doing work leaves a steam turbine high-pressure cylinder 7 and is further heated and warmed to a reheater 8 arranged in the methane incinerator 5 through a No. six low-temperature reheating pipeline L06 to form high-temperature reheating steam. The high-temperature reheated steam continues to work from a No. seven pipeline L07 to a low-pressure cylinder 9 of the steam turbine, and the exhaust steam is discharged to a condenser 11 to be condensed into condensed water.

And (3) starting the condensate pumps 12 (1 of the condensate pumps, and the other 1 of the condensate pumps for standby use), opening a fifth isolation valve 21, a sixth isolation valve 22, a seventh isolation valve 23 and an eighth isolation valve 24, discharging the condensate from the condenser 11, boosting the pressure through an eighth condensate pipeline L08 and the condensate pump 12, and conveying the deaerator 13 through a ninth condensate pipeline L09. Starting the boiler feed water pump 14 (wherein 1, another 1 heat standby), opening the nine 25 isolation valves, ten 26 isolation valves, eleven 27 isolation valves and twelve 28 isolation valves, discharging feed water from the deaerator 13, pressurizing the feed water through the No. ten feed water pipeline L010 and the boiler feed water pump 14, and conveying the feed water to the inlet of the superheater 6 through the No. eleven feed water pipeline L011.

And will be apparent to those skilled in the art from the foregoing description.

In addition, it should be noted that the specific embodiments described in the present specification may be different in the components, the shapes of the components, the names of the components, and the like, and the above contents described in the present specification are merely illustrative of the structure of the present invention. All the equivalent changes or simple changes made according to the structure, characteristics and principle of the utility model are included in the protection scope of the utility model. Various modifications, additions and substitutions may be made by those skilled in the art without departing from the scope of the invention as defined in the accompanying claims.

Claims

1. The utility model provides a reheating system of external methane stove of msw incineration processing power station, includes No. one methane pipeline (L01), no. two methane pipeline (L02), no. three methane pipeline (L03), no. four air pipeline (L04), no. five main steam pipeline (L05), no. six low temperature reheat pipeline (L06), no. seven high temperature reheat pipeline (L07), no. eight condensate water pipeline (L08), no. nine condensate water pipeline (L09), no. ten water supply pipeline (L010), no. eleven water supply pipeline (L011), no. twelve flue gas pipeline (L012) and No. thirteen flue gas pipeline (L013), its characterized in that: the system is characterized by further comprising a landfill leachate treatment station (1), a biogas storage cabinet (2), a biogas booster fan (3), a combustion-supporting fan (4), a biogas incinerator (5), a landfill leachate-exhaust-heat boiler superheater (6), a turbine high-pressure cylinder (7), a reheater (8), a turbine medium-low pressure cylinder (9), a generator (10), a condenser (11), a condensate pump (12), a deaerator (13), a boiler water-feeding pump (14) and a chimney (15), wherein the landfill leachate treatment station (1) and the biogas storage cabinet (2) are connected through a first biogas pipeline (L01), the biogas storage cabinet (2) and the biogas booster fan (3) are connected through a second biogas pipeline (L02), the biogas booster fan (3) and the biogas incinerator (5) are connected through a third biogas pipeline (L03), the combustion-supporting fan (4) and the biogas incinerator (5) are connected through a fourth air pipeline (L04), the landfill leachate-exhaust-heat boiler superheater (6) and the turbine high-pressure cylinder (7) are connected through a fifth main steam cylinder (L05), the high-pressure cylinder (7) and the turbine high-low-temperature boiler (7) are connected through a seventh reheater pipeline (8) and a turbine reheater (07), condenser (11) and condensate pump (12) are connected through No. eight condensate pipe way (L08), condensate pump (12) and oxygen-eliminating device (13) link to each other through No. nine condensate pipe way (L09), oxygen-eliminating device (13) and boiler feed pump (14) link to each other through No. ten water supply pipe way (L010), boiler feed pump (14) and waste incinerator-exhaust-heat boiler over heater (6) link to each other through No. eleven water supply pipe way (L011), waste incinerator-exhaust-heat boiler over heater (6), marsh gas incinerator (5) are respectively through No. twelve flue gas pipe way (L012), no. thirteen flue gas pipe way (L013) link to each other with chimney (15).

2. The reheating system of an external methane furnace of a waste incineration disposal power plant according to claim 1, characterized in that: the methane pipeline II is characterized by further comprising a first isolation valve (16) and a second isolation valve (17), wherein the first isolation valve (16) and the second isolation valve (17) are installed on the methane pipeline II (L02).

3. The reheating system of an external methane furnace of a waste incineration disposal power plant according to claim 1, characterized in that: the biogas pipeline II comprises a biogas pipeline II, and is characterized by further comprising a third isolation valve (18), a fourth isolation valve (19) and a pneumatic quick isolation valve (20), wherein the third isolation valve (18), the fourth isolation valve (19) and the pneumatic quick isolation valve (20) are installed on the third biogas pipeline L03.

4. The reheating system of an external methane furnace of a waste incineration disposal power plant according to claim 1, characterized in that: the system is characterized by further comprising a fifth isolation valve (21) and a sixth isolation valve (22), wherein the fifth isolation valve (21) and the sixth isolation valve (22) are installed on the eighth condensed water pipeline (L08).

5. The reheating system of the external methane furnace of the waste incineration disposal power plant according to claim 1, characterized in that: the nine-grade condensed water pipeline (L09) is provided with the seven isolating valve (23) and the eight isolating valve (24).

6. The reheating system of the external methane furnace of the waste incineration disposal power plant according to claim 1, characterized in that: the system also comprises a nine (25) isolation valve and a ten (26) isolation valve, wherein the nine (25) isolation valve and the ten (26) isolation valve are arranged on the tenth water supply pipeline (L010).

7. The reheating system of the external methane furnace of the waste incineration disposal power plant according to claim 1, characterized in that: the system also comprises an isolation valve eleven (27) and an isolation valve twelve (28), wherein the isolation valve eleven (27) and the isolation valve twelve (28) are installed on the eleven water supply pipeline (L011).

8. The reheating system of the external methane furnace of the waste incineration disposal power plant according to claim 1, characterized in that: the number of the condensate pumps (12) is two, and 1 is used for standby in normal operation; two boiler feed pumps (14) are provided, and 1 is used for standby in normal operation; the number of the biogas booster fans (3) is two, and the biogas booster fan 1 is used for standby in normal operation.

9. The reheating system of an external methane furnace of a waste incineration disposal power plant according to claim 1, characterized in that: and the low-pressure cylinder (9) in the steam turbine is respectively connected with the generator (10) and the condenser (11).