CN110748389A

CN110748389A - One-core three-supply three-elimination distributed system

Info

Publication number: CN110748389A
Application number: CN201911024341.1A
Authority: CN
Inventors: 周浩男
Original assignee: Shenzhen Zhongshi Huanneng Technology Co Ltd
Current assignee: Shenzhen Zhongshi Huanneng Technology Co Ltd
Priority date: 2019-10-25
Filing date: 2019-10-25
Publication date: 2020-02-04

Abstract

The application provides a one-core three-supply three-elimination distributed system, which comprises: the system comprises a fuel storage tank, a fuel mixer, a gas turbine, a generator, a garbage melting gasification furnace, a separation tank, a steam turbine, an absorption lithium bromide unit and a sludge drying furnace. The technical scheme that this application provided has the advantage that the efficiency is high.

Description

One-core three-supply three-elimination distributed system

Technical Field

The application relates to the field of environmental protection, in particular to a one-core three-supply three-elimination distributed system.

Background

After a traditional power plant converts fuel into electric energy, a large amount of redundant heat energy is usually abandoned. At present, a domestic power supply system is a centralized single power supply system which is mainly characterized by a large unit, a large power grid and high voltage, disturbance generated by a fault in one point of the power grid can cause great influence on the whole power grid, and large-area power failure and even whole-grid breakdown can be caused in severe cases.

The sludge refers to semi-solid or solid substances with different water contents generated in the sewage treatment process of a sewage treatment plant. The activated sludge process and the derivative technology thereof are the mainstream technical scheme of the current sewage treatment, and in recent years, the membrane treatment technology is developed rapidly, so that good effects are obtained in some specific fields. In either case, sludge is an unavoidable "by-product" of the sewage treatment process. Sludge treatment is the process of concentrating, regulating, dehydrating, stabilizing, drying or incinerating sludge.

The sludge has complex components, contains pathogenic microorganisms, parasitic ova, toxic and harmful heavy metals and a large amount of non-degradable substances, and easily causes secondary pollution to the environment if the sludge is not properly treated. Meanwhile, the sludge also contains a lot of abundant nutrient substances, and can be used as fertilizer to improve soil and promote plant growth after proper treatment; the biogas generated by treatment can be used as an energy substance, and certain energy problems are solved. How to properly treat the sludge, so that the sludge is stabilized, harmlessly treated, reduced and recycled, and becomes an urgent problem to be solved in environmental pollution treatment.

Disclosure of Invention

The invention aims to provide a one-core three-supply three-elimination system, and the technical scheme can improve the treatment effect of sludge, save energy and has the advantages of energy conservation and environmental protection.

The technical scheme adopted by the invention is as follows:

the present application provides a one-core three-supply three-elimination distributed system, the system comprising: the system comprises a fuel storage tank, a fuel mixer, a gas turbine, a generator, a garbage melting gasification furnace, a separation tank, a steam turbine, an absorption lithium bromide unit and a sludge drying furnace;

the output port of the fuel storage tank is communicated with one input end of a fuel mixer, and the other input end of the fuel mixer is communicated with the flue gas output end of the garbage melting gasification furnace; the input end of the garbage melting gasification furnace is communicated with the organic combustible gas output end of the separation tank;

the mixer organically mixes the flue gas of the separation tank and the natural gas, the mixed gas is firstly input into an input end of a gas turbine, the mixed gas and the air are combusted by the input end of the gas turbine to form high-temperature gas flow, the first gas turbine drives a first generator to carry out first-stage power generation, the high-temperature gas flow is input into a direct-connection hot air generator to drive a second generator to carry out second-stage power generation, then the high-temperature gas flow is conducted to an input end of a sludge drying furnace to dry sludge, the output end of the sludge drying furnace outputs high-temperature steam to the input end of a steam turbine, and the steam turbine drives a third generator to generate power by the high-temperature steam and inputs the high-temperature steam to an absorption lithium bromide unit after three-stage power generation;

the absorption lithium bromide unit is used for cooling or heating buildings.

Optionally, the absorption lithium bromide unit is used for inputting cold or heat supply condensation backwater into a water storage part of the sludge drying furnace, and the high-temperature airflow forms high-temperature steam after passing through the water storage part.

Optionally, the dried sludge of the sludge drying furnace is recycled to the garbage melting gasification furnace.

Optionally, the sludge drying furnace is arranged at the bottom of the steam turbine

The technical scheme that the scheme of this application passes through second grade gas turbine has realized tertiary electricity generation, and gas turbine's volume ratio is less, whole distributed system can become the integration scheme like this, make this system can realize the plot like this, avoided the garbage truck to draw into fixed refuse treatment station with rubbish, the consumption of the energy has been reduced, in addition, the improvement energy utilization that can be better of setting up of tertiary electricity generation rate, for the generating efficiency of steam turbine wheel, tertiary generating efficiency can improve 85%, therefore it has energy-conserving effect.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a one-core three-supply three-elimination system according to the present invention.

FIG. 2 is a schematic diagram of a thermal cycle of a steam turbine according to the present invention.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some, but not all, embodiments of the present application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The terms "first," "second," "third," and "fourth," etc. in the description and claims of this application and in the accompanying drawings are used for distinguishing between different objects and not for describing a particular order. Furthermore, the terms "include" and "have," as well as any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.

Along with the development of economy in China, the discharge amount of urban wastewater is increasing day by day. According to the statistical data of the building department: at the end of 2014, 1808 sewage treatment plants are shared in cities in China, 72 sewage treatment plants are added compared with the last year, the daily treatment capacity of the sewage treatment plant is 13088 ten thousand cubic meters, the daily treatment capacity is increased by 5.1% compared with the last year, and the length of a drainage pipeline is 51.1 ten thousand kilometers and is increased by 10.0% compared with the last year. The total urban sewage treatment amount is 401.7 billion cubic meters in the urban year, the urban sewage treatment rate is 90.18 percent and is increased by 0.84 percent compared with the last year, wherein the centralized treatment rate of the sewage treatment plant is 85.94 percent and is increased by 1.41 percent compared with the last year. The daily production capacity of the urban reclaimed water is 2065 ten-thousand cubic meters, and the utilization amount of the reclaimed water is 36.3 billion cubic meters.

Along with the popularization of sewage treatment facilities, the improvement of sewage treatment efficiency and the deepening of sewage treatment degree, the sludge yield of the urban sewage treatment plant is increased sharply. Because the sludge treatment and disposal capacity of the urban sewage treatment plant in China is insufficient and the means is backward, a large amount of sludge is not subjected to standardized treatment and disposal, and the sludge directly brings 'secondary pollution' to water, soil and atmosphere, so that the effective treatment capacity of a sewage treatment facility is reduced, the ecological environment is seriously threatened, and simultaneously, the resource is greatly wasted.

The existing sludge and garbage disposal methods mainly comprise three methods of landfill, incineration and composting. The landfill method has large floor area, and does not carry out effective harmless, reduction and resource treatment, thereby causing serious underground water pollution and secondary pollution; the burning method has large investment, and the smoke generated by burning contains a large amount of toxic gases such as sulfide, dioxin and the like, thereby causing secondary pollution to air; the composting process is prone to significant land pollution risks. Compost products have limited resource use due to the risk of heavy metal contamination and low N, P content. Moreover, the treatment time period is long, the occupied area is large, the odor is easy to generate, and the secondary pollution is caused.

The third aspect of the present application may include: power supply, heating and cooling.

Power supply: the power supply of the system is mainly divided into two stages, wherein the first stage is that a gas turbine is matched with a generator to generate power. The gas turbine is the main equipment of the system, and the kinetic energy generated by the high-speed operation of the gas turbine can be effectively converted into electric energy by combining with the generator; the second stage is to produce a great deal of high-temperature steam in the sludge drying process to drive a steam turbine to do work to generate electricity.

Heating: in winter, steam generated by the steam turbine enters a lithium bromide unit or heat exchange equipment for heat exchange to generate hot water for heating.

Cooling: in summer, steam generated by the steam turbine enters the lithium bromide unit to generate air-conditioning cold water for cooling, and the heat-electricity-cold poly-generation system is formed.

The three catalysts can specifically comprise: sludge elimination, garbage elimination, smoke elimination and sludge elimination: the sludge is dried by using high-temperature oxygen-free gas generated by a gas turbine and at the temperature of more than 500 ℃. Directly pumping the sludge in the concentration tank with the water content of more than 80% into a sludge carbonization furnace through a pump, drying and carbonizing the sludge through indirect contact, and feeding the formed carbonization into a subsequent recycling process. The generated flue gas and combustible gas flow back to the garbage pyrolysis furnace to be recycled as combustion efficiency.

Garbage elimination: the method comprises the steps of screening and crushing municipal collected household garbage, allowing the household garbage to enter a garbage melting furnace for closed low-temperature carbonization, fermentation and decomposition, and mixing the generated organic combustible gas with natural gas to be used as fuel of a gas turbine. The generated carbon slag and sludge drying products enter a subsequent recycling process.

Smoke elimination: the flue gas generated in the sludge drying process and the flue gas generated in the domestic garbage contain a large amount of organic combustible gas, and can be returned to the gas turbine through the fuel mixer to be effectively utilized as fuel.

Referring to fig. 1, fig. 1 is a schematic diagram of a one-core three-supply and three-elimination system provided in the present application, and as shown in fig. 1, the system may include: a sludge drying furnace, a garbage melting gasification furnace, a gas turbine, a steam turbine, a lithium bromide unit and a fuel mixer.

As shown in fig. 1, the system includes: a fuel storage tank 101, a fuel mixer 102, a gas turbine 103, a generator 104, a garbage melting gasification furnace 105, a separation tank 106, a steam turbine 107, an absorption lithium bromide unit 108 and a sludge drying furnace 109;

wherein, the output port of the fuel storage tank 101 is communicated with one input end of a fuel mixer 102, and the other input end of the fuel mixer 102 is communicated with the flue gas output end of the garbage melting gasification furnace 105; the input end of the garbage melting gasification furnace 105 is communicated with the organic combustible gas output end of the separation tank 106;

the mixer 102 organically mixes the flue gas of the separation tank 106 and the natural gas, and the mixed gas is input into the input end of the first gas turbine 103, the first gas turbine 103 combusts the mixed gas and air into high-temperature gas flow, the first input gas turbine 103 drives the first generator 104 to perform the first stage of power generation, the high temperature gas stream is input into the direct hot wind generator 110 to drive the second generator 104 to perform the second stage of power generation, then the high-temperature airflow is conducted to the input end of the sludge drying furnace 109 to dry the sludge, the high-temperature air flow is simultaneously transmitted to the input end of the steam turbine 107, the output end of the sludge drying furnace 109 outputs high-temperature steam to the input end of the steam turbine 107, and the steam turbine 107 drives a third generator to generate electricity through the high-temperature steam and the high-temperature air flow to carry out three-stage electricity generation and then inputs the high-temperature steam to the absorption lithium bromide unit 108;

the first gas turbine 103 is linked to the rotor end of the first generator 104, the direct-coupled hot wind generator is linked to the rotor end of the second generator 104, and the steam turbine 107 is linked to the rotor end of the third generator.

And the absorption lithium bromide unit 108 is used for cooling or heating the building.

In an alternative, the sludge drying furnace 109 is disposed at the bottom of the steam turbine 107.

Optionally, the condensed water for cooling or heating of the absorption lithium bromide unit 108 is input into the water storage part of the sludge drying furnace 109, and the high-temperature air flow forms high-temperature steam after passing through the water storage part. This scheme can carry out abundant utilization to the condensation return water.

Alternatively, the dried sludge in the sludge drying furnace 109 is recovered to the waste melter-gasifier 105. The scheme mainly improves the efficiency of the sludge, most substances of the sludge can be combusted for drying the sludge, and the sludge enters the garbage melting gasification furnace 105 to be combusted with organic combustible gas, so that the utilization efficiency of the sludge can be improved, and the efficiency is further improved.

The sludge drying furnace is a main sludge drying place, and the original sludge is sludge with 80% of water content in a concentration tank and is pumped into the drying furnace through a sludge pump; high-temperature flue gas at 500 ℃ generated by a gas turbine enters a sludge drying furnace, the flue gas and sludge in the furnace transfer heat indirectly, the generated steam can be separated from the organic flue gas, the formed high-temperature steam enters a steam turbine to do work and generate power, and the organic flue gas flows back to a garbage pyrolysis furnace to be used as fuel; the dried sludge (with the water content below 30 percent) enters a recycling process.

The municipal solid waste is crushed and then enters the waste melting gasification furnace, and is subjected to anaerobic carbonization at low temperature in the furnace, and the organic combustible gas produced by melting gasification is used as the fuel of the gas turbine.

The gas turbine is the core equipment of the three-supply three-elimination system and is a hub for driving the whole system to operate. The combustible gas generated by utilizing the sludge and the garbage is combined with natural gas fuel, the gas turbine is driven to operate, power is generated, the power is 2MW, the high-temperature flue gas has higher kinetic energy simultaneously to push the tail gas turbine to do work again, the power is 1MW, and the flue gas after doing work provides heat required by sludge drying.

A steam turbine is a rotary power machine that converts the energy of steam into mechanical work, and is mainly used as a prime mover for power generation.

The lithium bromide direct combustion type machine set has basically the same working principle, and is a cold and hot water machine set which directly provides heat energy through fuel oil or fuel gas \ steam to prepare cold water with the temperature of more than 5 ℃ and hot water with the temperature of less than 70 ℃.

The equipment belongs to vacuum equipment, is always operated in a negative pressure state, and has the following working principle:

refrigeration working condition: the solution pump sends the dilute solution in the absorber to the high-pressure generator, the solution is concentrated after being heated by a heat source, the solution after primary concentration immediately enters the low-pressure generator, the separated refrigerant steam enters the low-pressure generator, heat is released again (self condensation becomes water), the solution is further concentrated, and simultaneously the refrigerant steam is generated again, the refrigerant steam is condensed into water in the condenser, the water enters the evaporator through the throttling device, low-temperature evaporation is carried out under the negative pressure condition, the heat in the pipe is absorbed, so that the air-conditioning water in the pipe is cooled, the refrigeration effect is achieved, the concentrated solution is directly distributed to the absorber through the liquid distribution device, a large amount of water steam generated in the evaporation absorber is absorbed, and the concentrated solution becomes dilute solution, therefore, the method is as follows: water is the refrigerant and lithium bromide solution is the absorbent.

The refrigeration cycle process is a cycle that lithium bromide solution is changed from thin to thick in the machine, then is changed from thick to thin, and refrigerant water is changed from liquid to vapor, and then is changed from vapor to liquid, and the two processes are simultaneously carried out, and repeated, so as to achieve the purpose of refrigeration.

And (3) heating working conditions: the steam generated by the solution heated by the high-pressure generator emits heat when the surface of a copper pipe of the water heater is condensed, the hot water in the heating pipe, the diluted solution mixed by the concentrated solution and the refrigerant water are sent to the high-pressure generator by the solution pump for recycling and heating, when the refrigerating working condition is changed into the heating working condition, the two related switching valves are required to be opened simultaneously, and the cooling water pump and the refrigerant pump stop operating.

The whole shell of the gas turbine is a big cylinder, and an air inlet is formed at the front end of the big cylinder; in the middle there is a fuel inlet and at the rear end there is an exhaust (gas outlet).

The gas turbine mainly comprises three parts, namely a gas compressor, a combustion chamber and a gas turbine, and also comprises auxiliary equipment such as an air inlet filtering system, a control and regulation system, a starting system, a lubricating oil system, a fuel system, an accessory gearbox and the like.

The working process of the gas turbine is as follows: the compressor (i.e., compressor) continuously draws in air from the atmosphere and compresses it; the compressed air enters a combustion chamber, is mixed with the injected fuel and then is combusted to form high-temperature gas, and then flows into a gas turbine to expand and do work to push a turbine impeller to drive a compressor impeller to rotate together; the work capacity of the heated high-temperature gas is obviously improved, so that the gas turbine still has residual work as the output mechanical work of the gas turbine while driving the compressor. When the gas turbine is started from a static state, the gas turbine needs to be driven by a starter to rotate, and the starter is disconnected after the gas turbine is accelerated to be capable of independently operating.

Simple cycle operation of the gas turbine:

air enters the gas turbine from an air inlet, and the air is compressed into high-pressure air by the high-speed rotating compressor, and the flow direction of the high-pressure air is shown by a light blue arrow; the fuel is burnt in the combustion chamber to generate high-temperature and high-pressure air; the high-temperature and high-pressure air expands to push the turbine to rotate to do work; the gas after the work is done is discharged from the exhaust port, and the flow direction of the gas is shown by an arrow line.

The regenerative cycle operation of the gas turbine (as shown in fig. 2):

and the air at the outlet of the compressor is heated by the waste heat of the exhaust gas at the outlet of the turbine through the heat regenerator. Because the air entering the combustion chamber is preheated, the required fuel quantity is reduced, and the specific work is not changed, so that the heat efficiency of the circulation is improved.

The compressor (compressor) is responsible for sucking air from the surrounding atmosphere and supplying the air to a combustion chamber after pressurization. The working principle of the centrifugal compressor is the same as that of a centrifugal blower (or a centrifugal air duct), and the centrifugal compressor is used less frequently, and an axial-flow compressor is introduced.

The gas compressor of the gas turbine is driven by the turbine, and when the gas turbine is started, external power is firstly used for driving the gas compressor to rotate, so that air is pressed into the combustion chamber. The gas turbine is switched to an operation state after being ignited, and then the gas turbine drives the gas compressor to rotate to compress gas.

Combustion chamber

The combustor of the gas turbine converts chemical energy of a fuel, such as liquid fuel (e.g., gasoline) or gas fuel (e.g., natural gas), into heat energy, and heats high-pressure air pressed by a compressor to a high temperature so as to perform work on a turbine expansion. The combustion chamber shell is provided with an air inlet leading to the compressor in front and a high-temperature gas outlet leading to the turbine in the rear.

In the combustion chamber, the compressed air is changed into high-temperature gas, and the work capacity is obviously improved, so that the work of the gas in the turbine is greater than that consumed by the compressor, and the gas turbine can output power to drive a load.

There are four main types of combustion chambers for gas turbines: the annular combustion chamber is used more in the latter two types, and the annular combustion chamber is described below.

The combustor is arranged in the combustion chamber, and for liquid fuel, the combustor atomizes the entering fuel and sprays the fuel out of the nozzle; for gas fuel, the combustor sprays the entering gas fuel through a nozzle in a diffusion premixing mode, the gas fuel is fully mixed with air from the air compressor and then is combusted, and high-temperature and high-pressure gas is generated and sprayed out of an outlet of the transition section. The flame cartridge is arranged in the combustion chamber, the flame sprayed by the burner is combusted in the flame tube, and the front section of the flame tube is a main combustion area to ensure the normal combustion of the flame; the middle section is a afterburning area, and a plurality of air inlets are formed in the flame cylinder wall, so that air enters afterburning to ensure complete combustion; the aft section is the gas duct leading to the turbine blades, also referred to as the transition section.

The function of the axial flow turbine (turbine) is to convert the energy in the high-temperature and high-pressure combustion gas into mechanical energy, wherein about 3/5-2/3 of the energy is used for driving the air compressor to compress air, and the rest of the energy is used as the output power of the gas turbine to drive the load. At present, axial flow turbines are mostly used and are characterized by high power, high flow and high efficiency. The radial inflow turbine is a radial flow turbine and is mainly applied to a small-power gas turbine.

The operating principle of an axial turbine is as follows: the turbine is called an axial turbine because the main direction of the gas flow is parallel to the turbine shaft. The turbine mainly comprises turbine blades, a turbine disc (a bladed disc) and a turbine shaft, and the blades on the turbine are called movable blades, namely the blades drive the turbine shaft to rotate. The turbine typically has one to four turbines, with most gas turbines having several turbines sharing a common shaft that together form the turbine rotor. A stationary set of blades (vanes) is also mounted in front of each stage of blades of the turbine, the vanes being a guide for the combustion gases and acting as nozzles to direct the flow in the optimum direction towards the blades. The group of static vanes and the group of movable blades form a first-stage turbine.

The system provided by the application can save energy consumption, and is explained in a specific item below.

The 5MW one-core three-supply three-consumption system runs for one year (8000hr), the consumption natural gas amount is 560 ten thousand Nm2, the power generation amount is about 4000 ten thousand degrees, the heat supply amount is 72576GJ, the cold supply amount is 58060GJ, the sludge disposal amount is 49950 tons, and the garbage disposal amount is 33300 tons. The energy utilization rate of the device reaches 85%.

The system is built in a sewage treatment plant, and the generated wastewater can be automatically treated by the sewage treatment plant; and (3) preparing advanced fuel, organic fertilizer or permeable bricks by using carbide generated by sludge and garbage disposal, and realizing recycling.

Environmental impact of dust and exhaust gas during operation

According to the technical guideline for evaluating environmental impact, namely atmospheric environment (HJ2.2-2008), the system environmental air impact evaluation work level division is determined according to the factors such as the emission amount of main pollutants of a project, the complexity of surrounding terrain, the local execution environmental air quality standard and the like.

After the system is built and put into use, main pollutants are SO2, NOx, smoke dust and the like discharged by a gas-steam thermoelectric cooling combined cycle unit, the environmental impact evaluation working grade of the system can be determined to be three grades according to the requirements of environmental impact evaluation technical guide-atmospheric environment (HJ2.2-2008) by referring to environmental impact evaluation reports of other similar projects in China.

Influence of waste and sewage

According to the technical guide of environmental impact evaluation, namely the ground water environment (HJ/J2.3-93),

the evaluation work level of the surface water environment influence of the system is divided according to the project sewage discharge amount, the sewage quality complexity, the scale of the received water area and the water quality requirement.

The waste water that the system of this application produced mainly is recirculated cooling water system sewage, chemical make-up water processing system sewage, rubbish and mud system sewage and worker domestic sewage. The complexity of the water quality is simple. Because the project is in a sewage treatment plant, the produced sewage enters a sewage treatment process through a pipeline, and the discharge is zero.

Solid waste impact

The gasification melting incineration technology integrating low-temperature pyrolysis and high-temperature melting can effectively control the volatilization and infiltration of heavy metals to enable the heavy metals to be solidified in the vitreous slag, thereby not only reducing the secondary pollution caused by the heavy metals, but also providing conditions for safe utilization of the slag.

The rubbish of this application system forms glassy slag after the melting is handled, stability is fabulous, make the heavy metal seal up to be difficult for dissolving out, the production of the effectual oxysulfide of suppression and nitrogen oxide of gasification technique simultaneously, the combustion product is less than the standard requirement of "domestic waste incineration pollution control standard" (GB18485-2014) greatly, and the slag discharges and satisfies "domestic waste landfill pollution control standard" (GB 16889-2008), the system of this application carries out the resourceization comprehensive utilization (preparation senior fuel, fertilizer or the brick that permeates water) to the waste residue, can realize good environmental protection benefit, it is zero to discharge.

Run time noise impact

The system energy station is located in a sewage treatment plant, the sound environment of the area where the system energy station is located belongs to 3 types of areas, affected population of peripheral areas is basically not increased, and the system energy station refers to environmental impact evaluation reports of other similar items in China and is based on the environmental impact evaluation technical guide sound environment

(HJ/T2.4-2009) the system sound environment influence evaluation work level of the present application may be set to three levels.

Ecological environment impact

The total floor area of the system is 700m2, the system is located in a sewage treatment plant, the ecological sensitivity of an affected area is a general area, environmental impact evaluation reports of other similar projects in China are referred, and the ecological environment evaluation working level of the system is determined to be three levels according to the regulation of environmental impact evaluation technical guide-ecological impact (HJ/19-2011).

Influence on the grid

When the gas distributed energy system is operated in a grid-connected mode (only three-phase output), the three-phase voltage unbalance degree of the public connection point of the power grid does not exceed the numerical value specified in GB/T15543-1995 'electric energy quality three-phase voltage allowable unbalance degree', and the voltage unbalance degree allowable value is generally 1.3% when the gas distributed energy system is connected to each user of the public connection point.

Therefore, the influence of the project on the power grid can be considered to be within the allowable range of national standards.

The foregoing detailed description of the embodiments of the present application has been presented to illustrate the principles and implementations of the present application, and the above description of the embodiments is only provided to help understand the method and the core concept of the present application; meanwhile, for a person skilled in the art, according to the idea of the present application, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present application.

Claims

1. A one-core three-supply three-elimination distributed system, the system comprising: the system comprises a fuel storage tank, a fuel mixer, a gas turbine, a generator, a garbage melting gasification furnace, a separation tank, a steam turbine, an absorption lithium bromide unit and a sludge drying furnace; it is characterized in that the preparation method is characterized in that,

the mixer organically mixes the flue gas of the separation tank and the natural gas to form mixed gas, the mixed gas is firstly input into an input end of a gas turbine, the first input gas turbine burns the mixed gas and air to form high-temperature gas flow, the first gas turbine drives a first generator to perform first-stage power generation, the high-temperature gas flow is input into a direct-connection hot air generator to drive a second generator to perform second-stage power generation, then the high-temperature gas flow is conducted to an input end of a sludge drying furnace to dry sludge, the output end of the sludge drying furnace outputs high-temperature steam to the input end of a steam turbine, and the steam turbine drives a third generator to perform third-stage power generation through the high-temperature steam and then inputs the high-temperature steam into an absorption lithium bromide unit;

the absorption lithium bromide unit is used for cooling or heating buildings.

2. The system of claim 1,

the absorption lithium bromide unit is used for inputting cold or heat supply condensation backwater into a water storage part of the sludge drying furnace, and the high-temperature airflow forms high-temperature steam after passing through the water storage part.

3. The system of claim 2,

and the dried sludge in the sludge drying furnace is recycled to the garbage melting gasification furnace.

4. The system according to any one of claims 1 to 3,

the sludge drying furnace is arranged at the bottom of the steam turbine.