TWM563523U - Furnace side sinter suppression and independent waste heat recovery system - Google Patents

Abstract

The present invention is a hearth side sinter suppression and independent waste heat recovery system, including a water pipe wall disposed on the inner wall of the side wall of the hearth, and extending in parallel with the moving direction of the waste in the hearth, which can effectively recover the hearth. The residual heat generated during incineration reduces the temperature of the side wall of the hearth to suppress the formation of sinter. In particular, the water pipe wall includes a plurality of water pipe bodies, a plurality of fins, and an alloy layer, each water pipe body being separated from each other without contact, and circulating water flows, and the adjacent two water pipe bodies are by corresponding fins And connected together, and the outer surface of the water pipe body and the fin is covered by the alloy layer, thereby providing protection against high temperature, wear and corrosion, and prolonging the service life. Therefore, the system of this creation can greatly increase the operation rate and increase boiler efficiency and power generation efficiency.

Description

Furnace side sinter suppression and independent waste heat recovery system

The present invention relates to a hearth side sinter suppression and an independent waste heat recovery system, in particular, a water pipe wall which is disposed on the side wall of the hearth and extends parallel to the moving direction of the waste, in particular, does not require refractory material covering, and can greatly Improve the heat transfer effect, reduce the temperature of the side wall of the hearth, achieve the effect of inhibiting the formation of sinter, and effectively recover the waste heat generated by the hearth when incinerating waste.

Waste treatment method that uses the high temperature of the hearth to convert waste into highly stable products by incineration, because the area of the required equipment is much smaller than that of the landfill, and the treatment efficiency is high, and the land is thick for the isthmus Areas or metropolitan areas with relatively limited resources are quite effective solutions and have been widely used by countries all over the world. In addition, the heat generated during incineration can heat the boiler to generate steam power or hot water pipes to provide the needs of people's livelihood, including warm water to swim in the pool or bath.

However, when the sinter on the hearth side is severely generated, it often causes the waste to be hindered, unevenly distributed during feeding, and even unable to maintain the normal operation of the entire system, and needs to be shut down for maintenance. The current solution is to use steam gas enthalpy to reduce the temperature on the hearth side, and to effectively suppress the formation of sinter on the hearth side.

The low-level calorific value of the early waste is low, so the design of the hearth side must use refractory materials to achieve the heat-insulating effect, thereby maintaining the furnace temperature, preventing the incineration efficiency from decreasing, and avoiding the generation of harmful substances.

However, the above-mentioned conventional technology has the disadvantage that steam steam gas needs to consume part of the steam generated by the waste combustion, thereby reducing the economic benefit of selling electricity, and in particular, it will be more disadvantageous after adopting the renewable energy power purchase rate in the future. .

Therefore, there is a great need for an innovative hearth side sinter suppression and independent waste heat recovery system that can be greatly improved by using a water pipe wall that is placed on the side wall of the hearth and extends parallel to the direction of waste movement, especially without the need for refractory material. The heat transfer effect reduces the temperature of the side wall of the hearth to suppress the formation of the sinter, and effectively recovers the waste heat generated by the hearth when incinerating the waste, thereby solving all the problems of the above conventional technology.

The main purpose of this creation is to provide a furnace bed side sinter suppression and independent waste heat recovery system, including a water pipe wall, which is disposed on the inner wall of the side wall of the hearth and is specially designed to be parallel to the moving direction of the waste in the hearth. The extension is used to recover the waste heat generated by the hearth during incineration, reduce the temperature of the side wall of the hearth, and achieve the effect of suppressing the formation of the sintered body. In particular, the water pipe wall includes a plurality of water pipe bodies, a plurality of fins, and an alloy layer, each water pipe body being separated from each other without contact, and circulating water flows, and the adjacent two water pipe bodies are by corresponding fins. They are joined together, and the outer surfaces of the water tube body and the fins are covered by the alloy layer.

Further, the alloy layer has the characteristics of high temperature resistance, wear resistance and corrosion resistance, so that the water pipe wall can directly contact the waste and the exhaust gas, prevent the water pipe body and the fin from directly contacting the waste or the exhaust gas, and avoid corrosion and prolong the service life. .

The water pipe wall is placed on the left and right side wall surfaces of the boiler hearth, and does not need to be covered with refractory material, which can achieve excellent heat transfer effect, effectively recover waste heat, reduce the temperature of the side wall of the hearth, thereby inhibiting the formation of the sintered product and reducing the furnace. Warm, increase the amount of waste disposal. Therefore, this creation can effectively reduce the furnace temperature, increase the amount of waste treatment, and use the residual heat on the hearth side to completely or partially replace the application of the existing turbine to pump, increase boiler efficiency and power generation efficiency.

The implementation of the present invention will be described in more detail below with reference to the drawings and component symbols, so that those skilled in the art can implement the present specification after studying the present specification.

Referring to the first figure, a schematic diagram of the furnace bed side sinter suppression and the independent waste heat recovery system of the present embodiment is shown. As shown in the first figure, the hearth side sinter suppression and independent waste heat recovery system of the presently-created embodiment includes a set of water tube walls 10 that are designed within the boiler 20 and that are specifically designed to move parallel to the waste B in the hearth 30. The direction D extends to recover the residual heat generated by the hearth 30 during incineration, reduce the temperature of the side wall of the hearth, and achieve the effect of suppressing the formation of the sintered body. It should be noted that the set of water pipe walls 10 may be included in a water pipe wall, but for the sake of convenience of explanation, only a single water pipe wall 10 is shown, and a single water pipe wall 10 is also hereinafter described.

Further referring to the second and third figures, respectively, a cross-sectional view and a partial enlarged view of the water pipe wall in the creation. As shown in the second and third figures, the water pipe wall 10 is disposed on the side wall 32 of the hearth 30, and further, is located on the inner wall of the side wall 32, wherein the side wall 32 is composed of a plurality of layers of fire resistant 34. Specifically, the water pipe wall 10 includes a plurality of water pipe bodies 12, a plurality of fins 14, and an alloy layer 16, each of which is separated from each other without direct contact, and has circulating water flowing, and adjacent two water pipe bodies 12 is connected by the corresponding fins 14, and the outer surfaces of the water tube body 12 and the fins 14 are covered by the alloy layer 16, wherein the alloy layer 16 has the characteristics of high temperature resistance, wear resistance and corrosion resistance, so that The water pipe wall 10 can directly contact the waste and the exhaust gas, and can prevent the water pipe body 12 and the fins 14 from directly contacting the waste or the exhaust gas, and avoid corrosion and prolong the service life.

It is obvious that the water pipe wall 10 of the present invention is not completely covered by the fire refractory 34. Therefore, the surface of the water pipe body 12 facing the central portion of the hearth 30 can effectively absorb part of the heat generated by the combustion of the waste B, thereby heating the water pipe body 12 The water flowing inside, so the overall heat transfer effect of the water pipe wall 10 is quite excellent.

For a clearer description of the features of the present invention and the achieved effects, reference may be made to the fourth figure, a flowchart of an exemplary application example of the present creative embodiment. As shown in the fourth figure, the water in the steam collecting drum 40 is heat-exchanged in the hearth via the water pipe wall 10, and vaporized to generate high-temperature, high-pressure water vapor, which flows back into the steam collecting drum 40 for further utilization.

Further, the above-mentioned steam collecting drum 40, the heat exchanger 50, the cooling water tank 60, and the pump 70 constitute an independent closed water-steam circulation system, and the high temperature steam in the steam collecting drum 40 enters the heat exchanger. After 50, the heat is exchanged with the water heated by the steam pump of the existing steamer, and the heat is released to be cooled and condensed into water. Then, it is concentrated in the cooling water tank 60, and is pumped out of the cooling water tank 60 by the pump 70, and then sent to the steam collecting drum 40. And constantly looping. Therefore, this creation can also improve boiler efficiency and power generation efficiency. It should be noted that this creation does not require the change of the existing steam cycle device for the system in which the steam cycle device is installed, thereby simplifying the construction process and the procedures applied to the competent authority.

Furthermore, the design of the independent water-steam circulation device is calculated by mass-energy balance, and the control system is used to control the timing of heat extraction and heating, and the structural support of the water pipe wall in this creation considers the fixing method of the hearth. With the expansion and absorption direction, and the area of the water pipe wall has been considered to affect the furnace temperature, it can avoid the temperature of the furnace after the repair is less than 850 ^o C.

In addition, the water pipe wall 10 can effectively recover the waste heat generated when the hearth 30 is incinerated, can lower the temperature of the side wall 32 of the hearth 30, thereby suppressing the effect of forming a sintered body, and at the same time reducing the furnace temperature and increasing waste. The amount of processing of the object.

In summary, the main feature of the creation is to use the water pipe wall installed on the side of the hearth to reduce the temperature on the hearth side and improve the formation of the sintered material, so that the boiler does not have to be shut down due to the elimination of the sintering on the hearth side. The furnace temperature can be further reduced, and the waste treatment amount can be further increased, especially the waste heat on the hearth side can be effectively utilized, and the application of the existing steam turbine pumping can be completely or partially replaced, and the boiler efficiency and power generation efficiency can be increased.

The above description is only for the purpose of explaining the preferred embodiment of the present invention, and is not intended to impose any form of limitation on the creation, so that any modification or alteration of the creation made in the same creative spirit is provided. , should still be included in the scope of protection of this creative intent.

10‧‧‧Water pipe wall
12‧‧‧Water pipe body
14‧‧‧Fins
16‧‧‧ alloy layer
20‧‧‧Boiler
30‧‧‧ hearth
32‧‧‧ Side wall
34‧‧ fire resistance
40‧‧‧Set steam drum
50‧‧‧ heat exchanger
60‧‧‧Cooling trough
70‧‧‧ pump
B‧‧‧Waste
D‧‧‧ moving direction

The first figure shows a schematic diagram of the hearth side sinter suppression and independent waste heat recovery system according to the present creative embodiment. The second figure shows a cross-sectional view of a water pipe wall in accordance with the present embodiment. The third figure shows a partial enlarged view of the water pipe wall in accordance with the present embodiment. The fourth figure shows a schematic flow chart of an exemplary application example according to the present creative embodiment.

Claims (3)

The invention relates to a furnace bed side sinter suppression and an independent waste heat recovery system, which comprises a set of water pipe walls, which are arranged on inner walls of two side walls of a hearth and extend parallel to the moving direction of the waste for recycling the furnace The waste heat generated by the bed when incinerating the waste, and the set of water pipe walls comprises: a plurality of water pipe bodies, each of which is separated from each other without direct contact, and has circulating water flowing; a plurality of fins are connected Adjacent two water pipe bodies; and an alloy layer. The main body of the water pipe and the outer surface of the fins are covered, and have the characteristics of high temperature resistance, wear resistance and corrosion resistance, and can be directly contacted with waste and exhaust gas of the hearth to protect the water pipe body and the like. Wait for the fins. The hearth side sinter suppression and independent waste heat recovery system according to claim 1, wherein the side wall of the hearth is composed of a plurality of layers of refractory, and the refractory does not cover the water pipe wall. The hearth side sinter suppression and independent waste heat recovery system according to claim 1 of the patent application scope, wherein the set of water pipe walls is formed independently with a set of steam drums, a heat exchanger, a cooling water tank and a pump. a closed water-steam circulation system, and the high-temperature steam in the steam collecting drum exchanges heat with the water heated by the exhaust gas of the existing steam turbine after entering the heat exchanger, and releases heat to cool and condense into water. And concentrated in the cooling water tank, and then pumped out of the cooling water tank through the pump, and then sent to the steam collecting drum, and continuously circulate.