CN217482740U - Single-drum longitudinal water-fire tube shell type boiler - Google Patents

Abstract

The utility model discloses a single drum indulges formula water and fire tube pot type boiler, including combustion chamber, furnace and the vertical drum that sets up, be provided with the feeder hopper at the combustion chamber top, the internally mounted of combustion chamber has the traveling grate, and the one end of combustion chamber is provided with the air intake, the built-in screw thread tobacco pipe of drum is provided with the fore-arch and encircles with the back and be used for supporting the boiler in furnace, still is provided with water-cooling wall and water-cooling screen in furnace, the tube bank lower extreme of water-cooling screen passes water-cooling wall and furnace outer wall connection header tank, the tube bank outside of water-cooling screen is provided with the sleeve pipe, and the sleeve pipe tip is provided with the flange, welds between flange and the water-cooling wall. The welding seal between the sleeve and the fins can be increased by arranging the flange, no gap can be generated after expansion with heat and contraction with cold, the sleeve has certain length, and space is provided for axial movement of the tube bundle due to expansion with heat.

Description

A single-drum vertical water-fire tube shell boiler

technical field

The utility model relates to the technical field of boilers, in particular to a single-drum vertical water-fire tube shell-type boiler.

Background technique

The overall size of the single-drum vertical boiler is generally small, the investment cost of the boiler room is low, and high-efficiency threaded smoke pipes are used. The boiler type with the same capacity is obviously lower, so the outer size of the boiler is the smallest, which reduces the investment in the boiler room.

In order to increase the heat exchange efficiency, water cooling panels are often installed in the furnace chamber of the existing single boiler. The water-cooled screen tube bundles often need to be extended out of the furnace. In the prior art, the water-cooled screen tube bundles and the fins of the water-cooled wall tube bundles are generally directly welded. Since the tube bundles expand after being heated, gaps are prone to appear at the welding points after cooling. , which may lead to the leakage of flue gas in the furnace.

Utility model content

The technical problem to be solved by the utility model is the technical problem of gaps after the direct welding of the water-cooling wall fins and the water-cooling screen tube bundles of the existing single-drum boilers after thermal expansion and cold contraction.

In order to solve the above technical problems, the technical scheme adopted by the present utility model is: a single-drum vertical water-fire tube shell-type boiler, comprising a combustion chamber, a furnace and a longitudinally arranged drum, and a feeding hopper is arranged on the top of the combustion chamber , a chain grate is installed inside the combustion chamber, one end of the chain grate is provided with a driving sprocket, the other end of the chain grate is provided with a driven sprocket, and a number of ash drop grooves are arranged in the chain grate. One end is provided with an air inlet, the drum has a built-in threaded smoke pipe, a front arch and a rear arch are arranged in the furnace to support the boiler, and a water cooling wall and a water cooling screen are also arranged in the furnace, and the lower end of the tube bundle of the water cooling screen passes through. The water-cooling wall and the outer wall of the furnace are connected to the water collecting tank. The outer side of the tube bundle of the water-cooling panel is provided with a sleeve, the length of the sleeve is 5-10 cm, and the end of the sleeve is provided with a flange, and the flange is welded with the water-cooled wall.

Further, the water cooling wall includes several steel pipes, fins are arranged on both sides of the steel pipes, and the adjacent steel pipes are welded by the fins, the flange of the casing is welded on the fins, and the axis line of the casing is connected to the fins. vertical.

Further, the tube bundle of the water cooling screen is also provided with a wear-resistant sleeve, the wear-resistant sleeve includes an inner tube and an outer tube, the inner tube and the outer tube are both provided with notches along the axial direction, and the inner tube and the outer tube are notched. The notches are staggered from each other.

It can be seen from the above technical solutions that the utility model has the following advantages: the flange can increase the welding seal between the sleeve and the fins, no gap will appear after thermal expansion and cold contraction, and the sleeve has a certain length, which is Space is provided for axial movement of the tube bundle due to thermal expansion.

Description of drawings

Fig. 1 is the structural representation of the utility model;

Fig. 2 is the structural representation of the water cooling panel in the utility model;

3 is a schematic structural diagram of a wear-resistant sleeve in the utility model.

Detailed ways

The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

As shown in Figures 1 and 2, the single-drum vertical water-fire tube shell-type boiler of the present invention includes a combustion chamber, a furnace and a longitudinally arranged drum 2, and a feeding hopper 8 is provided on the top of the combustion chamber. A chain grate is installed inside, one end of the chain grate is provided with a driving sprocket 6, the other end of the chain grate is provided with a driven sprocket, a number of ash dropping grooves 7 are arranged in the chain grate, and one end of the combustion chamber is provided with a driven sprocket. There is an air inlet 5, the drum has a built-in threaded smoke pipe 1, the geometric size of the threaded smoke pipe and the smoke speed are reasonably selected, and the threaded smoke pipe does not accumulate dust and wear during normal operation of the boiler, so the output and thermal efficiency of the boiler do not extend with the running time. rather decreased. Front and rear arches 4 are provided in the furnace for supporting the boiler.

A water-cooling wall and a water-cooling screen 3 are also provided in the furnace. The lower end of the tube bundle 10 of the water-cooling screen is connected to the water collecting tank through the water-cooling wall and the outer wall of the furnace. The outer side of the tube bundle of the water-cooling screen is provided with a sleeve 11, and the length of the sleeve is 5-10 cm, the end of the sleeve 11 is provided with a flange 12, and the flange 12 is welded with the water cooling wall. The flange can increase the welding seal between the sleeve and the fins, no gap will appear after thermal expansion and cold contraction, and the sleeve has a certain length, providing space for the axial movement of the tube bundle due to thermal expansion.

The water cooling wall includes several steel pipes 9. Fins 91 are provided on both sides of the steel pipes 9. The adjacent steel pipes 9 are welded by fins. The flange of the sleeve 11 is welded on the fins. slice vertical. The tube bundle of the water cooling panel is also provided with a wear-resistant sleeve 13. As shown in Figure 3, the wear-resistant sleeve includes an inner tube 14 and an outer tube 15. The inner tube and the outer tube are provided with slots 16 in the axial direction. The notches of the outer tube are staggered from each other. The anti-wear sleeve can not only protect the tube bundle of the water-cooling screen, but also can be damaged by cracks caused by thermal expansion.

Claims (3)

1. A single-drum vertical water-fire tube shell-type boiler, comprising a combustion chamber, a furnace chamber and a longitudinally arranged drum, a feeding hopper is arranged on the top of the combustion chamber, a chain grate is installed inside the combustion chamber, and the chain furnace One end of the row is provided with a driving sprocket, the other end of the chain grate is provided with a driven sprocket, a number of ash dropping grooves are arranged in the chain grate, one end of the combustion chamber is provided with an air inlet, and the boiler drum has a built-in threaded smoke. The tube is provided with a front arch and a rear arch in the furnace to support the boiler, and a water cooling wall and a water cooling screen are also arranged in the furnace. It is as follows: the outer side of the tube bundle of the water cooling screen is provided with a sleeve, the length of the sleeve is 5-10 cm, the end of the sleeve is provided with a flange, and the flange is welded with the water cooling wall. 2. The single-drum vertical water-fired tube-and-shell boiler according to claim 1, wherein the water-cooling wall comprises a plurality of steel pipes, fins are provided on both sides of the steel pipes, and adjacent steel pipes are welded by the fins , the flange of the sleeve is welded on the fin, and the axis line of the sleeve is perpendicular to the fin. 3. The single-drum vertical water-fired tube-and-shell boiler according to claim 2, characterized in that: the tube bundle of the water-cooling screen is further provided with an anti-wear sleeve, and the anti-abrasion sleeve comprises an inner tube and a The outer tube, the inner tube and the outer tube are all provided with notches along the axial direction, and the notches of the inner tube and the outer tube are staggered from each other.

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