An energy-saving boiler tube rack

Abstract

An energy-saving boiler tube rack includes a boiler drum and a furnace tube rack. A front smoke box and a rear smoke box are located at the front and rear of the boiler drum, respectively. The front and rear smoke boxes are connected by several through-tubes passing through the boiler drum. The rear smoke box is connected to an outlet pipe. The furnace tube rack includes a main frame composed of left and right lower header tubes, left and right upper header tubes, and front and rear lower and upper horizontal tubes. Left and right outer wall tube rows are wrapped around the left and right sides of the main frame. Middle and lower header tubes and middle and upper header tubes are located within the main frame. The middle and upper header tubes connect upwards to the boiler drum via several boiler drum connecting pipes. The left and right outer wall tube rows and fins connecting the tubes form the left and right outer walls. A sealing structure is provided between the left and right outer wall tube rows and the adjacent left and right upper header tubes to prevent flue gas from rising. The main frame is located within the first and second flue gas return channels, which greatly increases the radiant heating surface of the furnace, improves heat absorption efficiency, and features small size, high output, energy saving, and high efficiency.

Description

Technical Field

[0001] This invention relates to a steam generating device, and more particularly to an energy-saving boiler tube rack. Background Technology

[0002] Traditional gas-fired boilers, especially large-tonnage boilers, are generally large in size. Most existing technologies use single-layer tube-type external wall structure frame boilers, but their heat is radiated through a small surface area, resulting in generally low thermal efficiency. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to address the shortcomings of the existing technology by proposing an energy-saving boiler tube rack that is small in size, has high output, and high thermal efficiency.

[0004] The technical problem to be solved by the present invention is achieved through the following technical solution: an energy-saving boiler tube frame, including a boiler drum and a furnace tube frame, with a front smoke box and a rear smoke box respectively provided at the front and rear of the boiler drum, the front smoke box and the rear smoke box being connected by a plurality of through-smoke pipes inside the boiler drum, and the rear smoke box being connected to an outlet smoke pipe, characterized in that:

[0005] The furnace tube frame includes a main frame consisting of left and right lower header tubes, left and right upper header tubes, and front and rear lower horizontal tubes and front and rear upper horizontal tubes; left and right outer wall tubes are wrapped around the left and right sides of the main frame.

[0006] The main frame is equipped with a lower and middle header pipe and a middle and upper header pipe. The middle and upper header pipe is connected to the boiler drum through several boiler drum connecting pipes. A water supply pipe is provided at the rear of the main frame. The water supply pipe has two sections, left and right, which are respectively connected between the lower left and right header pipes and the lower middle header pipe.

[0007] A lower wall pipe is connected between the left and right lower header pipes and the middle lower header pipe; a ceiling pipe is connected between the left and right upper header pipes and the middle upper header pipe; a left wall pipe is connected between the left lower header pipe and the left upper header pipe; a right wall pipe is connected between the right lower header pipe and the right upper header pipe; a front wall pipe is connected between the front lower horizontal pipe and the front upper horizontal pipe (on the left and right sides); a rear wall pipe is connected between the rear lower horizontal pipe and the rear upper horizontal pipe; a rear upper wall pipe is connected upwards between the rear upper horizontal pipe and the boiler drum; the lower ends of the left and right outer wall pipe rows are respectively connected to the left and right lower header pipes; the upper ends of the left and right outer wall pipe rows are respectively connected to the left and right outer wall header pipes; the left and right outer wall header pipes are respectively connected to the boiler drum through several connecting pipes.

[0008] The pipes of the roof tubes are connected by fins to form a flue gas partition wall. An upward flue gas outlet is opened at the roof tube near the rear of the furnace. The first flue gas return passage for fuel combustion is located below the flue gas partition wall, and the second flue gas return passage is set up between the flue gas partition wall and the boiler drum.

[0009] Fins are connected between the front and rear wall pipes and the rear upper wall pipe to form the front pipe wall and the rear pipe wall. The front smoke box is located above the front pipe wall, and the front smoke box has a smoke inlet that communicates with the second return passage of flue gas.

[0010] The left and right outer wall pipes and the fins connecting the pipes constitute the left and right outer walls. A sealing structure is provided between the left and right outer wall pipes and the adjacent left and right upper header pipes to prevent flue gas from rising.

[0011] The front tube wall has a fuel inlet, and the right or left outer wall has a door opening. The right or left wall tube of the furnace tube rack corresponding to the door opening is missing, forming an inner door opening.

[0012] The technical problem to be solved by the present invention can also be further achieved by the following technical solution: three sets of supporting downcomers are provided between the boiler drum and the furnace tube frame, each set of supporting downcomers includes two downcomers arranged symmetrically on the left and right, and the downcomers are respectively connected between the boiler drum and the left and right lower header tubes.

[0013] The technical problem to be solved by the present invention can also be further achieved by the following technical solution: the front smoke box is provided with a smoke box manifold, the smoke box manifold is located at the top of the front smoke box, and several water-passing side pipes are connected on both sides of the smoke box manifold. The pipes of the water-passing side pipes are connected by fins to form the outer wall of the front smoke box. The smoke box manifold extends into the boiler drum and extends to the other end of the boiler drum. Several water-passing ports are opened on the pipe wall of the part of the smoke box manifold located in the boiler drum.

[0014] The technical problem to be solved by the present invention can also be further achieved by the following technical solution: the water-passing side pipes on both sides of the front smoke box are connected to the left and right outer wall manifold pipes respectively.

[0015] The technical problem to be solved by the present invention can also be further achieved by the following technical solution: the side of the lower wall tube facing the furnace is provided with support fins for supporting fuel combustion.

[0016] Compared with the prior art, the present invention sets an outer pipe wall outside the main frame, and the main frame is set inside the first and second flue gas return channels. This greatly increases the radiation heating surface of the furnace and improves the heat absorption effect. At the same time, it has the characteristics of small size, large output, energy saving and high efficiency. Attached Figure Description

[0017] Figure 1 This is a simplified structural diagram of the present invention;

[0018] Figure 2 The structural view excluding the right wall pipe;

[0019] Figure 3 A side view showing the connection between the pipe rows on the left and right exterior walls of the main frame;

[0020] Figure 4 This is a diagram showing the supporting connection structure between the boiler drum and the downcomer.

[0021] Figure 5 This is a schematic diagram of the front wall structure;

[0022] Figure 6 This is a schematic diagram of the rear wall structure;

[0023] Figure 7 This is a diagram showing the connection between the upper and middle header pipes and the boiler drum.

[0024] Figure 8 This is an enlarged view of the fins connecting the lower wall pipe;

[0025] Figure 9 This is the front view of the connection between the lower wall tube fins. Detailed Implementation

[0026] The specific technical solutions of the present invention are further described below. To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, and to facilitate a better understanding of the present invention by those skilled in the art, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments, and do not constitute a limitation on its rights. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0027] An energy-saving boiler tube rack includes a boiler drum 2 and a furnace tube rack. A front smoke box and a rear smoke box 1 are respectively provided at the front and rear of the boiler drum. The front smoke box and the rear smoke box are connected by several through-smoke pipes inside the boiler drum. The rear smoke box is connected to the exhaust pipe.

[0028] The furnace tube frame includes a main frame composed of a lower left header pipe 29, a lower right header pipe 30, an upper left header pipe 21, an upper right header pipe 25, and front and rear lower horizontal pipes 28 and front and rear upper horizontal pipes 22; left and right outer wall pipe rows 5 are wrapped around the left and right sides of the main frame.

[0029] The main frame is provided with a lower and middle header pipe 27 and a middle and upper header pipe 23; the middle and upper header pipe is connected to the boiler drum through several boiler drum connecting pipes 20. A water supply pipe 12 is provided at the rear of the main frame. The water supply pipe has two sections, left and right, which are respectively connected between the lower and middle header pipes and the lower and middle header pipes.

[0030] A lower wall pipe 14 is connected between the left and right lower header pipes and the middle lower header pipe; a ceiling pipe 9 is connected between the left and right upper header pipes and the middle upper header pipe; a left wall pipe 15 is connected between the left lower header pipe and the left upper header pipe; a right wall pipe 26 is connected between the right lower header pipe and the right upper header pipe; a front wall pipe 32 is connected between the front lower horizontal pipe and the front upper horizontal pipe (on the left and right sides); a rear wall pipe 34 is connected between the rear lower horizontal pipe and the rear upper horizontal pipe; a rear upper wall pipe 33 is connected upwards between the rear upper horizontal pipe and the boiler drum; the lower ends of the left and right outer wall pipe rows are respectively connected to the left and right lower header pipes; the upper ends of the left and right outer wall pipe rows are respectively connected to the left and right outer wall header pipes 18; and the left and right outer wall header pipes are respectively connected to the boiler drum through several connecting pipes 16.

[0031] The pipes of the roof tubes are connected by fins to form a flue gas partition wall. An upward flue gas inlet 10 is opened at the roof tube near the rear of the furnace. The flue gas partition wall is the first flue gas return channel for fuel combustion below the flue gas partition wall. The flue gas partition wall is set up with the boiler drum as the second flue gas return channel.

[0032] Fins are connected between the front and rear wall pipes and the rear upper wall pipe to form the front pipe wall and the rear pipe wall. The front smoke box is located above the front pipe wall, and the front smoke box has a smoke inlet that communicates with the second return passage of flue gas.

[0033] The left and right outer wall pipes and the fins connecting the pipes constitute the left and right outer walls. A sealing structure 19 is provided between the left and right outer wall pipes and the adjacent left and right upper header pipes to prevent flue gas from rising.

[0034] A fuel inlet 31 is provided on the front pipe wall, and a door hole 6 is provided on the right (or left) outer wall. The right (or left) wall pipe of the furnace tube rack corresponding to the above door hole is missing, and the missing part forms an inner door hole 13.

[0035] The central manifold pipe arrangement allows the heated water in the pipe rack to be directly fed upwards into the boiler drum, increasing the overall strength of the pipe rack.

[0036] There are three sets of support downcomers 7, 8, and 11 between the boiler drum and the furnace tube frame. Each set of support downcomers includes two downcomers symmetrically arranged on the left and right sides. The downcomers are respectively connected between the boiler drum and the left and right lower header tubes.

[0037] The front and middle sets of support downcomers are shaped so that they start from the lower header pipe, move upwards, and then turn towards the boiler drum to connect, thus avoiding the furnace structure. The rear set of support downcomers consists of two diagonally braced straight pipes. These three sets of symmetrically arranged downcomers simultaneously provide load-bearing support for the upper boiler drum, ensuring the structural safety of the furnace tube frame.

[0038] The front smoke box is provided with a smoke box manifold 3, which is located at the top of the front smoke box. Several water-passing side pipes 4 are connected to both sides of the smoke box manifold. The pipes of the water-passing side pipes are connected by fins to form the outer wall of the front smoke box. The smoke box manifold extends into the boiler drum and extends to the other end of the boiler drum. Several water-passing ports are opened on the pipe wall of the part of the smoke box manifold located inside the boiler drum.

[0039] The water-passing side pipes on both sides of the front smoke box are connected to the left and right external wall manifold pipes, respectively.

[0040] The lower wall tube has support fins 35 on the side facing the furnace to support fuel combustion. The support fins are welded to the upper surface of the lower wall tube and the middle and lower header tube.

Claims

1. An energy-saving boiler pipe frame, comprising a boiler drum and a furnace pipe frame, a front smoke box and a rear smoke box are respectively arranged at the front and rear of the boiler drum, the front smoke box and the rear smoke box are connected by a plurality of pairs of through smoke pipes in the boiler drum, and the rear smoke box is connected with an outflow smoke pipe, characterized in that: the furnace pipe frame comprises a main frame composed of left and right lower header pipes, left and right upper header pipes, front and rear lower cross pipes and front and rear upper cross pipes; left and right outer wall pipe rows are arranged on the left and right sides of the main frame; a middle lower header pipe and a middle upper header pipe are arranged in the main frame; the middle upper header pipe is connected with the boiler drum through a plurality of boiler drum connecting pipes; a water supply pipe is arranged at the rear of the main frame and comprises two left and right sections connected between the left and right lower header pipes and the middle lower header pipe; a lower wall pipe is connected between the left and right lower header pipes and the middle lower header pipe; a ceiling pipe is connected between the left and right upper header pipes and the middle upper header pipe; a left wall pipe is connected between the left lower header pipe and the left upper header pipe; a right wall pipe is connected between the right lower header pipe and the right upper header pipe; a front wall pipe is connected between the front lower cross pipe and the front upper cross pipe; a rear wall pipe is connected between the rear lower cross pipe and the rear upper cross pipe; a rear upper wall pipe is connected between the rear upper cross pipe and the boiler drum; lower ends of the left and right outer wall pipe rows are connected with the left and right lower header pipes; left and right outer wall upper header pipes are connected with upper ends of the left and right outer wall pipe rows; the left and right outer wall upper header pipes are connected with the boiler drum through a plurality of connecting pipes; fins are arranged between the ceiling pipes to form a smoke separation wall; an upward through smoke port is arranged on the ceiling pipe near the rear of the furnace; a first smoke return channel for fuel combustion is arranged below the smoke separation wall; a second smoke return channel is arranged between the smoke separation wall and the boiler drum; fins are arranged between the front wall pipe, the rear wall pipe and the rear upper wall pipe to form a front pipe wall and a rear pipe wall; the front smoke box is arranged above the front pipe wall; the front smoke box is provided with an inlet smoke port connected with the second smoke return channel; the left and right outer wall pipe rows and the fins arranged between the pipes form left and right outer walls; a blocking structure is arranged between the left and right outer wall pipe rows and the adjacent left and right upper header pipes to prevent the smoke from rising therefrom; a fuel inlet is arranged on the front pipe wall; a door hole is arranged on the right or left outer wall; a corresponding wall pipe of the furnace pipe frame is missing to form an inner door hole; the front, middle and rear support descending pipes are arranged between the boiler drum and the furnace pipe frame; each group of support descending pipes comprises two descending pipes arranged symmetrically; the descending pipes are connected between the boiler drum and the left and right lower header pipes; the front smoke box is provided with a smoke box header pipe arranged at the top of the front smoke box; a plurality of water passing side pipes are connected on both sides of the smoke box header pipe; the water passing side pipes are connected by fins to form the outer wall of the front smoke box; the smoke box header pipe extends into the boiler drum and extends to the other end of the boiler drum; a plurality of water passing ports are arranged on the pipe wall of the portion of the smoke box header pipe arranged in the boiler drum; the water passing side pipes on both sides of the front smoke box are connected with the left and right outer wall upper header pipes; support fins are arranged on the side of the lower wall pipe facing the furnace for supporting fuel combustion. ​ ​ ​ ​ ​ ​ ​ 2. The energy efficient boiler tube rack of claim 1, wherein: ​ 3. The energy efficient boiler tube rack of claim 1, wherein: ​ 4. The energy efficient boiler tube rack of claim 3, wherein: ​ 5. The energy efficient boiler tube rack of claim 1, wherein: ​

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