CN2639719Y

CN2639719Y - Water cooling wall pipe driving jet circulation boiler

Info

Publication number: CN2639719Y
Application number: CN 03213893
Authority: CN
Inventors: 姜世庆; 张松涛
Original assignee: Individual
Current assignee: Individual
Priority date: 2003-07-02
Filing date: 2003-07-02
Publication date: 2004-09-08
Anticipated expiration: 2013-07-02

Abstract

The utility model relates to a boiler improvement technology, in particular to a water wall tube ejector cycle boiler mainly used for shell boilers and water pipe boilers. The utility model comprises a boiler barrel (1) and a lower header (8); wherein, a back-water distribution pipe (4) communicated with a boiler back-water pipe (3) is arranged in the boiler barrel (1); a row of water injection nozzles (5) are arranged on the back-water distribution pipe (4); each water injection nozzle (5) is one-to-one corresponding to the water inlet of a descending water wall tube (6), the water outlet of the descending water wall tube (6) is connected with the lower header (8); one end of an ascending water wall tube (7) is connected with the descending water wall tube (6) through the lower header (8), while the other end is connected into the boiler barrel (1). The utility model has the advantages of increasing the circulating water quantity, improving the water flowing speed inside the water wall tube, ensuring uniform water flowing velocity for the front and the rear water wall tubes, improving water cycle of boilers, avoiding the encrustation on the water wall tube and tube bursting, and improving the operation reliability of boilers.

Description

A kind of water screen tube injection combined-circulation once-through boiler

Technical field

The utility model relates to the improvement technology of boiler, is specially a kind of water screen tube injection combined-circulation once-through boiler, is mainly used in shell boiler and water-tube boiler.

Background technology

At present, traditional injection combined-circulation once-through boiler is to adopt drum, down-comer, next part case, water screen tube to couple together to constitute the boiler water cycle loop, mainly be down-comer and next part case injection to boiler, water flow velocity is low in the pattern boiler water-wall tube like this, water screen tube ascending water speed is inhomogeneous, causes water screen tube incrustation, booster easily.

The utility model content

The purpose of this utility model provides a kind ofly has higher water-cooling wall water speed, and front and back water screen tube water speed evenly, avoids the water screen tube injection combined-circulation once-through boiler of water screen tube incrustation, booster.

The utility model is achieved through the following technical solutions: a kind of water screen tube injection combined-circulation once-through boiler, have drum, next part case, be provided with the backwater distributing pipe that is communicated with the boiler blow-down water pipe in the drum, injection water jet in a row is installed on the backwater distributing pipe, each water jet is corresponding one by one with the water inlet of descending water cold wall pipe, the delivery port of descending water cold wall pipe is connected to the next part case, and ascending water cold wall pipe one end links to each other with the descending water cold wall pipe by the next part case, and the other end inserts drum.

The beneficial effects of the utility model are:

The utility model is arranged compact, and is rational in infrastructure, and under the pressure of return water effect, water is with the center ejection of high flow velocities facing to down-comer, because jet flow water speed is high, the water of ejection has the scale removal effect to water screen tube at a high speed; Around jet flow, form low-pressure area, attract the water in the drum to flow into the descending water cold wall pipe fast, thereby strengthened the water velocity in the descending water cold wall pipe, improved the water flow velocity of pipe in the closed circuit, and flow velocity is even, improves boiler water cycle, improves the heat exchange effect, prevent booster, improve the boiler operatiopn reliability.

Description of drawings

Fig. 1 is the utility model front view.

Fig. 2 is the utility model left view.

Fig. 3 is the utility model injection water jet view.

The specific embodiment

Shown in Fig. 1～3, the utility model is by drum 1, outlet pipe 2, return pipe 3, backwater distributing pipe 4, water jet 5, descending water cold wall pipe 6, ascending water cold wall pipe 7, next part case 8 compositions such as grade, outlet pipe 2 is installed on the drum 1, return pipe 3, be provided with the backwater distributing pipe 4 that is communicated with boiler blow-down water pipe 3 in the drum 1, injection water jet 5 is fixed on the backwater distributing pipe 4, each water jet 5 is corresponding one by one with the water inlet of descending water cold wall pipe 6, descending water cold wall pipe 6, ascending water cold wall pipe 7 is installed between drum 1 and the next part case 8, the delivery port of descending water cold wall pipe 6 is connected to next part case 8, ascending water cold wall pipe 7 one ends link to each other with descending water cold wall pipe 6 by next part case 8, and the other end inserts drum 1.

During use, boiler blow-down water enters drum 1 from return pipe 3, spray from water jet 5 through backwater distributing pipe 4, the water of ejection together enters descending water cold wall pipe 6 together with the part water around descending water cold wall pipe 6 inlets, through next part case 8, ascending water cold wall pipe 7 enters drum, draw from outlet pipe 2, water is through the backwater distributing pipe, water jet, to descending water cold wall pipe injection, increase to greatest extent and enter the water screen tube water yield, improve water speed, the corresponding water jet of each descending water cold wall pipe, the interior water flow velocity of water screen tube is even before and after having guaranteed, the water of ejection has the scale removal effect to water screen tube at a high speed simultaneously, make boiler water cycle more reliable, avoided the water screen tube fouling, the generation of booster increases the boiler operatiopn reliability.

Claims

1, a kind of water screen tube injection combined-circulation once-through boiler, have drum, next part case, it is characterized in that being provided with in the drum (1) the backwater distributing pipe (4) that is communicated with boiler blow-down water pipe (3), injection water jet in a row (5) is installed on the backwater distributing pipe (4), each water jet (5) is corresponding one by one with the water inlet of descending water cold wall pipe (6), the delivery port of descending water cold wall pipe (6) is connected to next part case (8), ascending water cold wall pipe (7) one ends link to each other with descending water cold wall pipe (6) by next part case (8), and the other end inserts drum (1).