KR20060041474A - Flame turning, circling combustion chamber and compacted built arc shape flue tubes into shell type boiler - Google Patents

Abstract

  BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a boiler that heats an inner wall of a combustion chamber, that is, an outer wall of a main body, to increase the temperature of water in a main body as necessary or to make a steam by ignited flame in a state of supplying and mixing fuel and oxygen as a combustion apparatus. Despite the progress in the past, the speed of development of efficiency and volume to capacity is still insufficient and the limit of one side is reached. However, in recent years, the energy problem caused by the rapid rise in fuel prices, limited limited resources due to the continuous increase in energy demand rather than supply, is pressing our daily lives as a serious challenge, which should be mitigated by the development of boiler technology. Accordingly, creativity of boiler technicians should be concentrated on developing high-performance boiler technology. To this end, the present invention starts from a fundamental question of what is a boiler rather than finding a partial improvement in boiler technology that has reached the conventional limit, and needs to find or develop the necessary technology. Analyze the problems of the technology and pay attention to the large amount of unnecessary preheat heat dissipation loss and heating time, and to solve this problem. The performance of combustion heat transfer speed is small and high capacity structure design, fabrication and installation of the combustion test step by step to verify this resulted in the semi-circular arc corrugated vertically arranged in the longitudinal direction on both ends of the combustion chamber inside the cylindrical body Streamlined combustion airflow inversion Blower integrated burner on the front, and tertiary air supply port on the back, and the first, second and reverse turns are made by the first and second combustion air in the first half of the combustion chamber. In the second half of the combustion chamber, the air curtain is formed by the tertiary combustion air, so that the fifth combustion by the third and inverted turns is continuously performed, thereby achieving complete combustion, and the air insulation layer formed by the viscosity of the air over the entire inner wall of the furnace. By rapidly transmitting heat of combustion with little blind spot, the internal temperature of the combustion chamber is effectively lowered, which significantly reduces the generation of nitride (NOx), and the complete combustion waste gas rises through the arc-shaped linkage installed at the bottom of the combustion chamber and heat transfers to the main body. 2.8 MW in a 500 mm diameter x 1,100 mm length cylindrical combustion chamber designed to flow through flue ducts Results showed that the efficiency was 90% based on the combustion capacity of / m 3 / hr and the total calorific value. In other words, the development of compact high-capacity technology led to the conclusion that 8 times higher load combustion is possible than 0.35MW / ㎥ / hr, which is the design value of conventional boiler-related boilers, and the size of the boiler can be reduced to less than 1/5. It became.

 Arc-linked, compact structure, combustion air inversion plate, reverse swing combustion, full combustion structure, combustion chamber volume load, small high capacity boiler.                                    

Description

  Flame turning, circling combustion chamber and compacted built arc shape flue tubes into shell type boiler}

  1 is a small high capacity boiler longitudinal section

  2 is a small high capacity boiler cross section

<Description of Symbols for Main Parts of Drawings>

(1): cylindrical body with arc-shaped association (2): arc-shaped association

(3): Front combustion air inversion plate (4): 3rd air supply port

(5): Rear combustion air flow reverse plate (6): Blower integrated burner

(7): fuel injection nozzle (8): conical diffuser

(9): tertiary air supply pipe (10): combustion chamber

(11): Copper tube for the cutter (12): Year

  BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a boiler that heats an inner wall of a combustion chamber, that is, an outer wall of a main body, to increase the temperature of water in a main body as necessary or to make a steam by ignited flame in a state of supplying and mixing fuel and oxygen as a combustion apparatus. The fact is that the progress has been gradually developed with the progress of the history, but due to the limitations of the conventional technology and the technical idea, the speed of development of efficiency and volume-to-volume is still insufficient, and the limit has been reached.

However, while there is always a need for an easy-to-use, safe and economical boiler, the energy problem due to the rapid rise in fuel prices, limited limited resources due to the continuous increase in demand for energy than supply, is a serious challenge. It is pressing everyday life, which should be mitigated by the development of boiler technology, and thus the creativity of boiler technicians should be concentrated on the development of high-performance boiler technology. To this end, the present invention starts from a fundamental question of what is a boiler rather than finding a partial improvement in boiler technology that has reached the conventional limit, and needs to find or develop the necessary technology. Analyzing the problems of the technology, the large preheat heat dissipation loss is large, and the heating time is long, the solution to solve this problem aimed to develop a small high capacity boiler technology.

 Small, high-capacity seems to be incompatible with freezing, but here's the clue to solving the problem. In other words, from the viewpoint of miniaturization of form and high performance, the part where unnecessary preheat heat dissipation loss occurs is reduced in size to find the balance point of the heat capacity by increasing the combustion heat transfer rate, which is the performance, and further reduce the size and the combustion heat transfer rate. The step-by-step description of the high-capacity, small-capacity structural design and fabrication, and the combustion test process to verify its combustion effects are as follows.

 Step 1: manufacture and install the body and associated design

  As shown in Fig. 2, the inner space of the two-cylinder body 1 is minimized in size, while a semi-circular arc-shaped tube 2 is fitted inside the body in the longitudinal direction to the boiler capacity for rapid combustion heat transfer. Install the water tightly vertically.

 Step 2: Install the front and rear combustion air inversion plate and burner

  As shown in Fig. 1, the streamlined front combustion airflow inversion plate 3 and the rear combustion airflow inversion plate 5 made of heat-resistant steel inside both ends of the combustion chamber 10, which are inside the inner cylinder, and the heat transfer area of the combustion chamber, as shown in FIG. And install the blower integrated burner (6) of the corresponding capacity.

 Step 3: Combustion Experiment

  ① Combustion process in the center of combustion chamber

   When the air is supplied to the blower at the same time as fuel injection through the fuel injection nozzle 7 of the burner, the injected fuel is mixed with the primary air passing through the inside of the conical diffuser 8 and the first combustion starts at the same time as the ignition. The flame and combustion air stream secondary burned by the secondary air passing outside the diffuser are ejected to the center of the combustion chamber. In this way, the first and second combustion is performed by the burner in the first half of the combustion chamber, and about 20% of the air flow is sent to the center of the combustion chamber through the third air supply pipe (9) and the third air supply port (4). As a result of the interaction between the primary combustion flame and the combustion air stream, an air curtain indicated by a dotted rectangle in FIG. 1 forms and contacts the unburned gas to help the third combustion, while the high temperature generated by the first and second combustion. The radiant heat of the shield is blocked to prevent overheating of the rear part of the combustion chamber.

 ② Reverse turning combustion process in the first half of combustion chamber

  Subsequently, the first and second combustion flames ejected from the center of the front combustion airflow inversion plate to the center of the combustion chamber and the combustion airflow are shown in FIGS. 1 and 2 due to the occurrence of negative pressure between the front inversion plate and the first half of the furnace and the collision with the opposite third air flow. The remaining unburned gas undergoes secondary air and fourth combustion while turning in the reverse direction of the arrow.

  ③ Reverse turn combustion process

   Similarly, the tertiary air blown through the central part of the rear combustion airflow inversion plate to the center of the combustion chamber is also in the direction of the arrow shown in Figs. The remaining unburned gas in the second half of the combustion chamber after the third combustion while inverting turns to the third air and the fifth combustion.

  ④ The heat transfer process of the complete combustion waste gas through arc-type association

   The last residual unburned gas flows in the upper part of the combustion chamber with the difference in density from the completely burned waste gas, and is combusted during the 4th and 5th inversion turning, and the relatively heavy full burned waste gas rises through the arc-shaped tube installed at the bottom of the combustion chamber and heat transfers to the main body. Then, the supply water to be heated to flow out into the flue (12) through the copper tube 11 for the saved coal firer.

  ⑤ Combustion load test method

   The maximum combustion load of the combustion chamber is measured by adjusting the input and output temperature difference, the flow of water and the fuel air supply of the burner according to the relevant regulations.

 ① As shown in Fig. 2 (1), as the internal space of two cylindrical bodies having a constant diameter combustion chamber is reduced in size, the preservation heat loss is reduced and the heating time is shortened.

  ② As shown in Fig. 2 (2) by installing an arc-shaped connection inside the body to further reduce the internal volume of the body while expanding the heat transfer area to maintain the balance of heat capacity, while preheating heat loss is further reduced, heating time is further shortened.

  ③ As shown in Fig. 1, if the arc-shaped corrugation is installed in the longitudinal direction to increase the quantity and length, the heat transfer area increases by that much to secure the required heat capacity.

(4) The fourth and fifth inverted swirl combustion which flows toward the furnace wall surface in the combustion chamber (10) of FIGS. 1 and 2 promotes complete combustion of the residual unburned gas, while forming an air insulating layer formed by the viscosity of the air over the entire inner wall of the furnace. It can effectively reduce the internal temperature of the combustion chamber by the rapid transfer of combustion heat with almost no blind spots, which significantly reduces the generation of NOx and prevents burnout of the combustion airflow reverse plate.

The heat transfer area required is not reduced, and minimizing the amount of water retained by the minimization of the main body, the unnecessary preheat heat dissipation loss and heating time can be reduced as much as possible, while miniaturized high capacity and high efficiency characteristics can be realized by complete combustion by reverse swing combustion technology.

In addition, through repeated trials and errors of design, manufacturing and installation to realize this, the results of repeated combustion tests and the test results of the official institutions were 90% based on the combustion capacity and total calorific value of 2.8 MW / ㎥ / hr in the cylindrical combustion chamber of 500mm in diameter and 1,100mm in length. The result which shows the efficiency of was obtained. In other words, the development of compact high-capacity high-efficiency technology has led to the conclusion that 8 times higher load combustion is possible than 0.35MW / ㎥ / hr, which is the design value of conventional boiler-related boilers, and the size of the boiler can be reduced to less than 1/5. It became.

Claims (2)

 Boiler consisting of a reverse swing combustion chamber and an arc-associated associative body  2. The streamlined front combustion air inverting plate (3) according to claim 1, wherein the arc-shaped tube (2) having a semicircle size is arranged vertically in the longitudinal direction, and formed in a streamlined front combustion air inversion plate (3) made of heat resistant steel at both ends of the combustion chamber (10) inside the cylindrical body (1). ) And a blower integrated burner at the front of the combustion chamber inverting plate (5) and the front of the combustion chamber, and the third air supply port (4) is made at the rear, and the first and second combustion air in the first half of the combustion chamber. And the fourth combustion is performed by the reverse turning, the air curtain is formed by the tertiary combustion air in the second half of the combustion chamber, and the fifth combustion is performed by the third and the reverse turning, and then the complete combustion waste gas is formed at the bottom of the combustion chamber. Boiler that ascends through the heat transfer to the body and then exits to the flue through the

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