KR102009184B1 - Renewable energy system for recycling sewage sludge into solid fuel - Google Patents

Abstract

The present invention relates to a renewable energy system for recycling sewage sludge for pellet fuel which collects and converts sewage sludge, which is a waste material, into a recycled raw material through pretreatment and recycles the raw material into pellet fuel to be used as renewable energy. The system comprises a sewage sludge recycling server which collects sewage sludge, which is a waste, in connection with a sewage sludge treatment plant server, a sludge transporter terminal and a power plant server, recycles the sewage sludge into a raw material, and converts the recycled raw material into pellet fuel to produce renewable energy. The sewage sludge recycling server includes a sewage sludge collecting means for collecting the sewage sludge, which is a waste, to determine the state and evaluating the sewage sludge treatment plant based on the result of the state determination, thereby implementing a renewable energy system to recycle sewage sludge into pellet fuel.

Description

Renewable energy system for recycling sewage sludge into solid fuel

The present invention relates to a renewable energy system for recycling sewage sludge into pellet fuel. More particularly, the present invention relates to recycling raw materials by collecting sewage sludge, which is a waste material, and recycling them through pre-treatment, and pelletizing fuel into renewable fuel. The present invention relates to a renewable energy system for recycling sewage sludge into pellet fuel.

In general, sludge is separated from the liquid generated during the treatment of sewage and wastewater, and it is precipitated. The sludge generation is also increasing as the domestic sewage and wastewater treatment plants continue to increase with industrial development.

Due to the high water content of about 75 to 85%, the sludge shortens the life of the landfill and causes odors, increases the generation and concentration of leachate, causing soil and groundwater contamination around the landfill, and treats leachate. Excessive facility and maintenance costs provide the cause for higher treatment costs. This high water content lowers the calorific value during incineration, increasing the amount of auxiliary fuel used, and generating air pollutants such as chlorine compounds and dioxins due to the lowering of the incineration temperature.

Therefore, in recent years, a technology for collecting sewage sludge and then processing and using it as an alternative fuel has been developed. A general method for treating sewage sludge is a method of collecting pellets, mixing waste synthetic resin or coal in the sludge, forming the dried sludge, and molding the pellets to form pellet fuel.

Conventionally proposed techniques for recycling sewage sludge are disclosed in the following <Patent Documents 1> to <Patent Document 2>.

The prior art disclosed in <Patent Document 1> removes sludge, nitrogen and phosphorus in sewage through a primary sedimentation tank, a biological advanced treatment, and a secondary sedimentation tank to which a flocculant is administered, and uses a CNT filtration device to remove pathogens from sewage. The present invention provides a sewage and sludge resource treatment system which removes other toxic substances and discharges them, and pretreats sludge generated in the primary sedimentation tank and the secondary sedimentation tank during the sewage treatment. By injecting coagulant containing acetic acid into this sewage treatment system, phosphorus and nitrogen are removed and carbon nanotube (CNT) coated or coated metal filter is installed to remove harmful substances of bacteria and pathogens. By installing a ball mill crusher without clogging, sludge reduction efficiency is increased.

In addition, the prior art disclosed in <Patent Document 2> responds to the RPS (mandatory use of renewable energy to reduce carbon dioxide) for high-calorie power plants through environmentally friendly treatment of sewage sludge, which is a malignant waste such as groundwater contamination caused by the generation of a large amount of leachate. It provides a hybrid sludge fuel coal production system and its manufacturing method that can contribute greatly to foreign currency saving by making fuel and replacing wood pellet fuel, which has been dependent on imports. This configuration reduces the energy requirements compared to the pellet fuel production system using the sewage sludge in the barrel and prevents the re-adsorption of moisture by drying, carbonizing or semi-carbonizing the fuel manufacturing process using the sewage sludge and food waste. This enables the supply of pellet fuel having a high calorific value.

Republic of Korea Patent No. 10-1607823 (registered on March 25, 2016) (sewage and sludge resource treatment system) Republic of Korea Patent No. 10-1860041 (registered May 15, 2018) (Hybrid sludge fuel coal production system and its manufacturing method)

However, the prior art as described above can be recycled using sewage sludge and produce sludge fuel coal, but the heat generation amount is low, the efficiency of utilization of fuel coal is low, and the cost of drying the mixed raw materials is high.

Therefore, the present invention has been proposed to solve all the problems arising in the prior art as described above, by collecting the sewage sludge as a waste material, recycled raw materials through pre-treatment, and recycled raw materials pelletized to utilize the renewable energy The aim is to provide a renewable energy system for the recycling of sewage sludge into pellet fuel.

In order to achieve the object as described above, the renewable energy system for recycling the sewage sludge according to the present invention as pellet fuel, wastewater sewage sludge collected in connection with the sewage sludge treatment plant server, sludge transporter terminal and power plant server It includes the sewage sludge resource server to produce recycled raw materials through the pre-treatment, and to recycle the raw materials, pelletized fuel to produce renewable energy,

The sewage sludge recycling server includes sewage sludge collection means for collecting sewage sludge which is waste to determine a state and evaluating the sewage sludge treatment plant based on the result of the state determination.

The sewage sludge collection means in the sewage sludge collection unit for collecting sewage sludge through the sludge transporter; A state determination unit for determining a state by analyzing a water content of the sewage sludge collected by the sewage sludge collection unit; And a sewage sludge evaluation unit for evaluating the sewage sludge treatment state of the sewage treatment plant based on the water content of the sewage sludge determined by the state determination unit.

The sewage sludge collection means includes a sewage sludge collection cost determining unit for determining the sewage sludge collection cost based on the evaluation result of the sewage treatment plant evaluated by the sewage sludge evaluation unit,

The sewage sludge collection cost determining unit is characterized in that to determine the sewage sludge collection cost differentially according to the distribution of water content of sewage sludge.

In addition, the sewage sludge recycling server is characterized in that it further comprises a sewage sludge pretreatment means for producing a recycled raw material by lowering the water content to below the set content by mixing the dry matter in the sewage sludge.

The sewage sludge pretreatment means includes a dry matter mixing unit for mixing dry matter with the collected sewage sludge; A stirring unit for drying the indirect hot air while stirring the raw materials mixed in the dry mixing unit; A mixture selection unit for removing only foreign substances contained in the mixture dried by the stirring unit and selecting only the recycleable mixture; It characterized in that it comprises a recycling treatment unit for producing a recycled raw material by powdering the mixture selected in the mixture selection unit.

In addition, the sewage sludge resource server is characterized in that it further comprises a renewable energy resource means for producing renewable energy by increasing the weight and calorific value by mixing dry matter with the recycled raw materials produced in the sewage sludge pretreatment means.

The renewable energy resource means comprises a dry mixing unit for increasing the weight and calorific value by mixing the dry matter to the primary dried recycled raw material; It characterized in that it comprises a dry material recycling unit for producing renewable energy by molding the recycled raw materials mixed in the dry mixing unit in the form of pellets.

The dried material uses a reinforcing agent for increasing the weight and calorific value as a dry material, and the reinforcing agent includes a dry sludge and / or a calorie reinforcing agent.

In addition, the renewable energy resource means includes a reinforcing agent evaluation unit for evaluating the reinforcing agent state for optimization of the reinforcing agent, and presenting the evaluated reinforcing agent state value as a reference value of the reinforcing agent purchase cost.

In addition, the sewage sludge resource server is characterized in that it further comprises a resource intermediary to relay the renewable energy in the form of pellets produced by the renewable energy resource means in connection with the power plant server.

According to the present invention, wastewater sewage sludge may be collected and recycled into raw materials through pretreatment, and pelletized fuel may be utilized as renewable energy.

1 is an overall configuration diagram of a renewable energy system for recycling sewage sludge into pellet fuel according to the present invention;
2 is a detailed block diagram of the sewage sludge resourceization server of FIG. 1;
3 is a detailed block diagram of the sewage sludge collection unit of FIG.
4 is a detailed block diagram of the sewage sludge pretreatment unit of FIG. 2;
5 is a detailed block diagram of the renewable energy resource means of FIG.

Hereinafter, a renewable energy system for recycling sewage sludge into pellet fuel according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 is an overall configuration diagram of a renewable energy system for recycling sewage sludge into pellet fuel according to a preferred embodiment of the present invention, a sewage sludge treatment plant server 100, a sludge transporter terminal 300, and a power plant server 400. ), The communication network 200 and the sewage sludge resource server (500).

The sewage sludge treatment plant server 100 is provided in the sewage treatment plant and serves to provide after drying the sewage sludge generated during sewage treatment.

The sludge transporter terminal 300 transports the sewage sludge from the sewage treatment plant to the place requested by the sewage sludge resource server 500 when the sewage sludge transportation request is made by the sewage sludge resource server 500. Terminal used by. The sludge carrier terminal 300 may use a server computer.

The power plant server 400 is provided in the power plant, in conjunction with the sewage sludge resource server 500, is a server that manages the power plant as a whole to generate power to the pellet fuel using recycled raw materials.

The communication network 200 is a network for interworking the sewage sludge treatment plant server 100, the sludge transporter terminal 300, and the power plant server 400 with the sewage sludge recycling server 500, and may use a wired / wireless network. have.

In addition, the sewage sludge recycling server 500 is connected to the sewage sludge treatment plant server 100, the sludge transporter terminal 300 and the power plant server 400 to collect the sewage sludge as a waste material to be recycled raw materials through pre-treatment It includes a sewage sludge resource server 500 for recycling and pelletizing the recycled raw materials to produce renewable energy.

The sewage sludge resource server 500 is, as shown in Figure 2, the sewage sludge treatment plant server 100, the sludge transporter terminal 300 and the power unit server 400 for performing a data communication in communication unit ( 501), the control unit 502 for controlling the overall operation for sewage sludge resource management and information database 510 to manage the information of the sewage sludge treatment plant, and the evaluation information and sewage sludge supply amount of each sewage sludge treatment The sewage sludge treatment plant management unit 503 to manage, the sludge carrier management unit 504 to manage the information of the sludge transporter, the power plant management unit 505 to manage the plant information, the sewage sludge as a waste is collected to determine the status, Sewage sludge collection means 506 for evaluating the sewage sludge treatment plant based on the discrimination result.

The sewage sludge collection means 506, as shown in Figure 3, sewage sludge collection unit 601 for collecting the sewage sludge through the sludge transporter, the water of the sewage sludge collected by the sewage sludge collection unit 601 Sewage sludge evaluation unit 603 for evaluating the sewage sludge treatment state of the sewage treatment plant based on the water content of the sewage sludge determined by the state determination unit 602 and the state determination unit 620 by analyzing the content. The sewage sludge collection cost determination unit 604 determines the sewage sludge collection cost based on the evaluation result of the sewage treatment plant evaluated by the sewage sludge evaluation unit 603.

Here, the sewage sludge collection cost determining unit 604 preferably determines the sewage sludge collection costs differentially according to the distribution of the water content of the sewage sludge.

In addition, the sewage sludge recycling server 500 includes a sewage sludge pretreatment means 507 to produce a recycled raw material by lowering the water content to below the set content by mixing the dry matter in the sewage sludge.

The sewage sludge pretreatment means 507, as shown in Figure 4, the indirect hot air while stirring the raw material mixed in the dry matter mixing unit 701, the dry matter mixing unit 701 to mix the dry matter collected sewage sludge Stirring unit 702 to be dried through, the mixture selection unit 703 to remove only foreign matter contained in the mixture dried by the stirring unit 702 to select only the recyclable mixture, the mixture selected from the mixture selection unit 703 Recycling processing unit 704 for producing a recycled raw material by powdering the mixture.

In addition, the sewage sludge resourceization server 500 mixes dry matter with recycled raw materials produced by the sewage sludge pretreatment means 507 to increase the weight and calorific value to generate renewable energy resource means 508. Include.

As shown in FIG. 5, the renewable energy resource converting means 508 mixes dry matter with the primary dried recycled raw material to increase weight and calorific value, and a dry matter mixing portion 801 and the dry matter mixing portion 801. In the building resource recycling unit 802 for producing renewable energy by molding the recycled raw materials mixed in the pellet form, the reinforcing agent is evaluated for optimization of the reinforcing agent, and the estimated reinforcing agent value is presented as a reference value of the reinforcing agent purchase cost. The reinforcing agent evaluation part 803 is included.

In addition, the sewage sludge recycling server 500 is connected to the power plant server 400, the resource relay unit 509 for relaying the renewable energy of the pellet form produced by the renewable energy resource means 508 to the power plant It may include.

Referring to the attached renewable energy system for recycling the sewage sludge into pellet fuel according to a preferred embodiment of the present invention configured as described above in detail as follows.

First, the sewage sludge recycling server 500 is connected to the sewage sludge treatment plant server 100 in the sewage sludge treatment plant management unit 503, the information of the sewage treatment plant (contact, contact person, email, address, sewage sludge statistics, sewage sludge statistics, collection) Days and others), and when the sewage sludge collection request from the collection date or the sewage treatment plant occurs, the sludge carrier management unit 504 requests the sludge carrier to transport the sewage sludge of a specific sewage treatment plant. Here, the sludge carrier management unit 504 also stores and manages the sludge carrier's information (contact, contact person, e-mail, address, volume, date of transport, etc.).

Here, the sewage sludge treatment plant management unit 503 also serves to calculate the cost for sewage sludge collection from the sewage treatment plant.

When the sludge transporter requests sewage sludge transport from the sewage sludge resource server 500 through the sludge transporter terminal 300, the sludge transporter visits the sewage treatment plant and collects the sewage sludge, and the sewage sludge resource server 500 Transport to the place requested.

The sewage sludge collection means 506 of the sewage sludge recycling server 500 collects sewage sludge which is waste to determine a state, and evaluates the sewage sludge treatment plant based on the state determination result.

For example, the sewage sludge collecting means 506 collects sewage sludge from the sewage sludge collecting unit 601 through a sludge transporter, and stores sewage sludge collection information in the information database 510. That is, sewage sludge collection information such as sewage sludge collection amount and collection date of sewage treatment plant A, sewage sludge collection amount and collection date of sewage treatment plant B is stored.

Next, the state determination unit 602 analyzes the water content (water content) of the sewage sludge collected by the sewage sludge collection unit 601 to determine the state. Here, each sewage treatment plant performs sewage sludge only after the basic treatment (leave it in its natural state) and supplies sewage sludge. If the basic sewage sludge treatment is performed here, the water content of the sludge is about 75 to 85%. When the water content of the sludge is more than 85%, a separate drying process is required, which leads to high drying costs. Determination of the state of the sludge may use a generally known moisture content meter. The water content information of the sludge determined by the water state determination unit 602 is provided to the sewage sludge evaluation unit 603.

The sewage sludge evaluator 603 matches the water content information of the sludge to the sewage treatment plant and evaluates each sewage treatment plant through statistical processing. For example, the sludge moisture content of the sewage treatment plant A is 83%, the sludge moisture content of the sewage treatment plant B is 78%, and the sludge moisture content of the sewage treatment plant C is 75%.

Subsequently, the sewage sludge collection cost determination unit 604 determines the collection cost of each sewage treatment plant based on the sewage treatment plant evaluation information. Here, the higher the water content of sewage sludge, the higher the collection cost. The reason for this is that the higher the water content of the sludge, the higher the drying cost.

The sewage sludge collection cost thus determined is stored in the information database 510, and the sewage sludge treatment plant management unit 503 notifies the sewage treatment plant of the sewage sludge collection cost. It also sends reasons for the cost of sewage sludge collection.

The manager of the sewage treatment plant receiving the sewage sludge collection cost will try to lower the water content of the sewage sludge in order to lower the cost of treating the sewage sludge from the sewage treatment plant. Properly lowering the water content of sludge in sewage treatment plants makes it easier to transport sewage sludge from sewage sludge carriers, reduces the cost of drying in sewage sludge recycling companies, and reduces the cost of treating sludge in sewage treatment plants. You can do it.

On the other hand, when the sewage sludge is collected, the sewage sludge pretreatment means 507 mixes the dry matter to the sewage sludge to lower the water content to below the set content to produce recycled raw materials.

For example, the dry matter mixing section 701 of the sewage sludge pretreatment means 507 mixes the dry matter with the collected sewage sludge. Subsequently, the stirring unit 702 is dried through indirect hot air while stirring the raw materials mixed in the dry mixing unit 701. In addition, the mixture sorting unit 703 removes the foreign substances contained in the mixture dried by the stirring unit 702 to sort only the recyclable mixture, and the recycling processing unit 704 is the mixture selected by the mixture sorting unit 703 Powdered to produce recycled raw materials.

If this is explained in more detail as follows.

The dry mix is a mixture of sawdust and sludge as a material material to produce a mixture. In the mixing process, it is preferable to mix the sawdust and sludge evenly distributed. In general, the sludge and sawdust are not mixed well due to the surface tension and the agglomeration between the sludge particles and flotation due to the small mill of sawdust. Therefore, to mix the sawdust and sludge in a form of kneading or kneading so that the particles of the sludge contact the sawdust at the time of mixing to produce a mixture.

In other words, the mixing may be configured in the form of a cylindrical mixing stage and a mixing means that is installed inside the mixing stage to repeatedly rub the sawdust and sludge as material materials while conveying the mixture in one direction. The mixing means may be a screw-shaped blade is formed continuously on the shaft. The mixing is carried out in the form of sawdust and sludge crushing. Sawdust is a dry state having a water content of 10% to 15% may be prepared with a particle size of 5mm or less. Such sawdust is not produced by recycled wood, it may be produced by processing natural wood. In addition, the sludge may be one having a water content of 75 to 85%. Here, the water content suggested in the present invention may be adjusted to be close to the numerical value suggested in the actual process, and may not have a precisely designated numerical value. However, it is preferable that the numerical values set forth in the present invention are understood to be the numerical values that can produce the optimal results.

Stirring serves to stir the mixture. Agitation increases the mixing rate and mixing uniformity of the mixture, and serves to make the particle size small and even. To this end, the mixture is continuously stirred for a predetermined process time by means such as a paddle, and the mixture is stirred using a method different from the mixing method of the mixing portion. For example, it may be configured to include a cylindrical stirring stage and a rotating shaft installed inside the stirring stage, a paddle for rotating at a constant speed while repeatedly stirring the mixture by rotating the rotating shaft. This induces a collision between the paddle and the mixture and between particles of the mixture to produce a mixture with a smaller particle size than the mixture. The mixture produced by this agitation is smaller than the mixture produced during the initial mixing and has evenly sized particles.

Subsequently, a mixture screening process removes foreign substances contained in the mixture.

When the foreign matter contained in the mixture is removed, the mixture generated by the recycling processing unit 704 is heated to dry, and a dry mixture, in which the moisture content of the mixture is adjusted to a moisture content suitable for molding, is produced as recycled raw materials. To this end, the mixture is heated by indirect heating, and the steam generated by the heating is discharged to produce the dry mixture as recycled raw materials. The water content of recycled materials will be reduced from 10% to 12%. Through this process, pretreatment is performed. Indirect heating generates heat in the heating source and transfers the heat generated to the heating duct through the heat supply pipe. The heating source may generate heat by burning fossil fuels such as gas and petroleum, or may generate heat by electricity. The heating source can supply the air heated by the heat generation to the heating duct through the heat supply pipe. The heating source may be heated to a different temperature for each drying stage. That is, by controlling the amount of heat supplied from the heating source can be heated to a different temperature for each drying stage. This is because the water content varies as the mixture passes through several stages of the drying stage, so that the drying efficiency decreases in the case where the stage has the lowest moisture content when heated to the same temperature. Therefore, by adjusting the heat supply from the heating source, it is possible to maintain the high temperature as the drying stage with a high moisture content, or to supply a large amount of heat to be dried. To this end, in the present invention, the drying stage may be formed in multiple stages, and the temperature may be different for each stage. Here, the heating source may be configured inside the heating duct to directly heat the outside of the drying stage, but it may be more efficient to supply hot air to the heating duct to prevent carbonization of the mixture. Therefore, in the present invention, it is assumed that only one heating source is used to supply heat to a heating duct provided for each drying stage by a heat supply pipe.

As such, the recycled raw material pretreated through the pretreatment may be used in various fields.

In the present invention, it is assumed that the pretreated recycled raw material is pelletized with renewable energy, and this is made of fuel coal and supplied to a power plant for resourceization.

For example, the renewable energy resource means 508 mixes dry matter with recycled raw materials produced by the sewage sludge pretreatment means 507 to increase the weight and calorific value to produce renewable energy.

The renewable energy resource means 508 mixes the dry matter to the recycled raw material primarily dried in the dry matter mixing unit 801 to increase the weight and calorific value, and in the dry matter mixing unit 801 in the dry matter resource unit 802 Renewable energy is produced by molding mixed recycled raw materials into pellets.

Renewable energy is produced by injection molding a dry mixture into pellet fuel. For the production of pellet fuel, it may include an injection mold for injection molding, a press for pressing the dry mixture on the injection mold, and a supply for supplying the dry mixture between the press and the injection mold. The dry mixture may be formed in the form of pellets, or may be formed in the form of compressed coal having a larger size than the pellets.

A more detailed description of the renewable energy resources is as follows.

The primary dry recycled raw material has a disadvantage in that it contains a relatively high amount of moisture, thereby degrading the formability of pellets, having low calories, and having a low weight and low efficiency as a pellet fuel. In addition, there is a disadvantage that the odor also occurs as a relatively high amount of moisture.

As a method for increasing weight with increasing calories, drying is processed in a powder form by a known method using a conventional mixer to maintain a water content of 9% to 10% in the recycled raw material after the first drying process Secondly mix the sludge.

The solids of the dry sludge in powder form are 21% by weight and moisture is 2% by weight. When the dry sludge in powder form is mixed under the above conditions, molding into pellets has a disadvantage in that it is not smoothly formed, and when the mixture is mixed under the above conditions, the calorie increase and the weight increase are insignificant. It is preferable.

In other words, by mixing the dried sludge processed in powder form with recycled raw materials having a water content of about 10 to 12% through the first mixing and drying processes, the water content is lowered to 9% to 10% (after cooling), as well as This increases the calories and also the weight.

Here, the secondary mixed mixture is molded into pellets, which are pellet fuels required by conventional pellet molding machines. The pellet fuel shaped into pellets has a water content of 10 to 12%, and the water content of the finished product cooled is 9 to 10%.

Secondary mixtures having a water content of 9% to 10% have better molding efficiency when forming into pellet form compared to the primary mixtures having a water content of 10 to 12%. Instead of being molded, the molding takes place in a relatively rigid and uniform form.

In particular, the pellet fuel produced by mixing the dry sludge in the form of powder is calorie increase with weight increase, it can have a high utilization and efficiency as a pellet fuel.

Thus, the present invention does not have a complicated technical configuration, but by mixing the dry sludge in the form of powder so as to have a water content of 9 to 10% to the mixture having a water content of 10 to 12% through the first mixing and drying processes. In the state in which the molding to the pellets is completed, it provides a pellet fuel which can have an excellent calorific value due to the increase in calories and weight.

In addition, with a small amount of water content also has excellent conditions for molding efficiency, there is also a condition that can be smoothly made pellets of uniform and rigid form always.

On the other hand, it has a higher calorific value after molding into pellets with an increase in calories and weight, so that it can also minimize the odor from the manufactured pellets.

As another embodiment of the present invention, calorie reinforcement may be added and mixed with the dried sludge during secondary mixing to further increase the calorie value. Here, it is preferable that the solids of a calorie reinforcement have 5 weight% and moisture have 0%.

The calorie reinforcement herein may utilize dried coffee sludge in conventional powder form having a deodorizing function. Coffee sludge is a dried sludge free of moisture in a conventional manner after coffee beans are ground and the stock solution is extracted.

In the first and dried mixtures, the dry sludge and caloric reinforcing agent in powder form are added and mixed to maintain 9 to 10% of the moisture content, thereby increasing calories and weight, as well as excellent calorific value by the caloric reinforcing agent. It can be secured.

Furthermore, as the coffee sludge is used as a calorie reinforcement, the secondary mixture may also reduce the odor such as odor due to the deodorizing action of the coffee sludge itself, and the odor may be minimized even in the finished pellets.

Here, as another embodiment of the present invention, the reinforcing agent evaluation unit 803 evaluates the reinforcing agent for the optimization of the reinforcing agent (calorie reinforcing agent), and presents the evaluated reinforcing agent state value as a reference value of the reinforcing agent purchase cost. Reinforcement evaluation is an evaluation of the moisture content contained in the reinforcing agent, the lower the moisture content is evaluated as a good calorie reinforcing agent.

In addition, as another feature of the present invention, the resource intermediary unit 509 relays the pellet fuel (renewable energy coal in the form of pellets) to the power plant server 400 produced using the recycled raw materials as described above. As a method of brokering fuel coal, which is renewable energy, to the power plant, it is necessary to calculate the price of fuel coal, negotiate with the plant manager to finally determine the delivery price, or receive the supply unit price from each power plant in reverse auction. There may be a way to supply only coal.

By using fuel coal made of recycled raw materials using sewage sludge on the power plant side, it is possible to reduce the heat source cost while maintaining the power generation compared to the raw material used for the heat source for existing power generation, and thus to reduce the cost, and from the fuel coal supplier side, By using sewage sludge to produce recycled raw materials and using them to produce fuel coal, it is possible to generate profits from the cost of treating sewage sludge, and to generate profits by selling fuel coal while reducing fuel coal production prices. In addition, the power plant can generate electricity by using low-cost fuel coal, thereby lowering the price of electricity supply, which is advantageous in that electricity can be used at a low price even in a consumer position using the same.

Although the invention made by the present inventors has been described in detail according to the above embodiments, the present invention is not limited to the above embodiments, and various modifications can be made without departing from the spirit and scope of the present invention. Self-evident to those who have

100: sewage sludge treatment plant server 200: communication network
300: sludge transporter terminal 400: power plant server
500: sewage sludge resource server 503: sewage sludge treatment plant management unit
504: sludge transporter management unit 505: power plant management unit
506: sewage sludge collection means 507: sewage sludge pretreatment means
508: renewable energy resource means 509: resource intermediary

Claims (10)

As a renewable energy system for recycling sewage sludge into pellet fuel,
It includes sewage sludge resource server that collects waste sewage sludge in connection with sewage sludge treatment plant server, sludge transporter terminal, and power plant server, recycles it into pre-treatment and recycles it, and recycles raw materials into pellet fuel to produce renewable energy. and,
The sewage sludge recycling server includes sewage sludge collection means for collecting sewage sludge which is waste to determine a state, and evaluating the sewage sludge treatment plant based on the state determination result; It includes a renewable energy resource means for producing renewable energy by increasing the weight and calorific value by mixing dry matter with the recycled raw materials produced through the pretreatment,
The sewage sludge recycling server mixes the dried matter with the collected sewage sludge, and dry the mixed raw materials through indirect hot air while stirring, and sorts only the recyclable mixture by removing foreign substances contained in the dried mixture, and selects the selected mixture. Powdered sewage sludge pretreatment means for producing recycled raw materials, and mixing the sawdust and sludge in the form of beating or kneading the sawdust and sludge so that the particles of the sewage sludge to the maximum contact with the dried sawdust when the dry matter is mixed into the sewage sludge ,
The sewage sludge collection means is a sewage sludge collection unit for collecting sewage sludge through the sludge transporter; A state determination unit for determining a state by analyzing a water content of the sewage sludge collected by the sewage sludge collection unit; A sewage sludge evaluation unit for evaluating the sewage sludge treatment state of the sewage treatment plant based on the water content of the sewage sludge determined by the state determination unit; It includes a sewage sludge collection cost determination unit for determining the sewage sludge collection cost based on the evaluation result of the sewage treatment plant evaluated by the sewage sludge evaluation unit,
The sewage sludge collection cost determination unit determines the sewage sludge collection costs differentially according to the distribution of water content of sewage sludge,
The sewage sludge resource server is connected to a power plant server for regeneration of the sewage sludge as a pellet fuel, characterized in that it comprises a resource intermediary to relay the renewable energy of the pellet type produced by the renewable energy resource means to the power plant Renewable energy system.
delete delete The sewage sludge recycling server further comprises a sewage sludge pretreatment means for producing recycled raw materials by mixing dry matter in the sewage sludge to lower the water content below a predetermined content, thereby recycling the sewage sludge into pellet fuel. Renewable energy system.
The method according to claim 4, wherein the sewage sludge pretreatment means is a dry matter mixing unit for mixing the dry matter to the collected sewage sludge; A stirring unit for drying the indirect hot air while stirring the raw materials mixed in the dry mixing unit; A mixture selection unit for removing only foreign substances contained in the mixture dried by the stirring unit and selecting only the recycleable mixture; Renewable energy system for recycling the sewage sludge into pellet fuel, characterized in that it comprises a recycling treatment unit for producing a recycled raw material by powdering the mixture selected from the mixture selection unit.
delete The method of claim 1, wherein the renewable energy resource means comprises a dry material mixing unit for increasing the weight and calorific value by mixing the dry matter with the recycled material dried by the sewage sludge pretreatment means; Renewable energy system for recycling the sewage sludge into pellet fuel, characterized in that it comprises a dry material recycling unit for producing renewable energy by molding the recycled raw materials mixed in the dry mixing unit into pellets.
The method of claim 7, wherein the dried material is a reinforcement for increasing the weight and calorific value as a dry material, the reinforcing agent comprises a renewable sludge and / or calorie reinforcement, renewable energy for recycling the sewage sludge into pellet fuel system.
The sewage sludge of claim 8, wherein the renewable energy resource means includes a reinforcing agent evaluating unit for evaluating the reinforcing agent state for optimization of the reinforcing agent and presenting the evaluated reinforcing agent state value as a reference value of reinforcing agent purchase cost. Renewable energy system for recycling into pellet fuel.

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