CN2323282Y - Multipurpose energy-saving coal boiler - Google Patents

Abstract

The utility model relates to a multipurpose energy saving coal-fired boiler which is an improved domestic coal-fired boiler. The utility model is mainly composed of a boiler body, a smoke channel, a heat collecting pipe, a heat exchanger, and an accessory of the heat exchanger, wherein the boiler body and the smoke channel all have double layer structures, and the interlayer of the boiler body and the smoke channel is a water containing layer. The smoke channel which is connected with the boiler body is annularly bent downward and arranged at the lower part of the boiler body. A water return pipe is arranged in the turning position of the smoke channel below the boiler body, and the return water with lower temperature enters the boiler body after mixed with the hot water and heated. Consequently, the defects of low hearth temperature, insufficient burning of coal, high exhaust gas temperature and low residual heat utilization rate existing in the existing household boiler are overcome. The utility model has the advantages of small size and high heat efficiency and is suitable for areas where the central heating and the heat supply are hard.

Description

The multifunctional and energy-saving coal-burning boiler

The utility model is a kind of improved residential coal combustion boiler, is family's heating, culinary art, lives and use the hot water multi-function boiler, is specially adapted to be difficult for the area use of central heating, heat supply.

At present, the coal-burning boiler of family's use mostly is straight horizontal following formula flue.Return pipe is located on the shaft (be return pipe not on shaft, backwater can directly enter shaft), and feed pipe is provided with on flue, and fire box temperature is low, fire coal is insufficient, exhaust gas temperature is high, utilization rate of waste heat is low thereby cause, and the thermal efficiency is low, energy-saving effect is poor.

The purpose of this utility model is with the ring-like curved down restoration of lower stack that places of the flue that is connected with shaft, return pipe is arranged on the position that flue changes, make backwater through mix with hot water and heat after enter shaft, thereby overcome shortcomings such as fire box temperature is low, exhaust gas temperature height.

Fig. 1 be the A of Fig. 2 to view, Fig. 2 is I-I profile of Fig. 1.

Describe concrete structure of the present utility model and operation principle in detail below with reference to accompanying drawing 1, Fig. 2

This boiler is mainly by shaft [6], flue [15], thermal-collecting tube [13], heat exchanger [3] and annex outer cover [16] thereof, stove plate [14], fire grate [8] and collect grey drawer [10] etc. and form.Shaft [6] is the cylindrical shape double-decker, interlayer [7] thin (10mm) is the layer that is filled with water, be connected with heat exchanger [3] with the Dg25 steel pipe on shaft top, boiler heating pipe [2] is drawn by the top of heat exchanger, heat exchanger housing is made cylindrical water tank for thin steel weldering, interior coiling 8m is long, and the copper pipe of φ 8mm [4], water inlet pipe [5] are connected to running water, and outlet pipe [1] is connected to the equipment of washing of bathing.The cross section is that the flue [15] of rectangle is drawn the curved down restoration of lower stack of putting of annular from shaft, with right, along the flow of flue gas direction gradient that descends is arranged, and be double-decker, interlayer [11] thin (10mm) is the layer that is filled with water, the diameter that is provided with horizontal stagger arrangement layout in the flue is the thermal-collecting tube [13] of φ 12mm, thermal-collecting tube laterally slightly inclines, and its gradient is 1/40, and return pipe [9] is arranged on the inboard of flue turning site, outer lower portion is established cigarette ash and is removed mouthful [17], and the outlet flue of flue tail end [12] links to each other with chimney.

Its operation principle is as follows: the lower backwater of temperature enters the flue interlayer by return pipe to be mixed with the hot water of flue bottom and heats, make the formation of flue bottom have water (because the variation of return water temperature of uniform temperature, this temperature has individual scope), so both can effectively alleviate " revealing knot ", the absorption of heat when helping hot flue gas again by this section flue, therefore reduced exhaust gas temperature, improved utilization rate of waste heat, when backwater arrives shaft by mixing the heating of process flue, the temperature of water has raising by a relatively large margin, make burner hearth obtain higher temperature, thereby help the abundant burning of fuel, improve heat source temperature, aggravated the radiant heat transfer and the convection heat transfer' heat-transfer by convection of thermal source.As a whole, the heat of fuel is discharged fully in the shaft, is effectively absorbed by flue then, thereby has improved boiler thermal output greatly.

This boiler volume is little, structure is tightly played, thermal efficiency height, effect of coal saving are remarkable

Claims (2)

1. an improved multifunctional and energy-saving residential coal combustion boiler is made up of shaft [6], flue [15], thermal-collecting tube [13], heat exchanger [3], feed pipe [2], return pipe [9] and annex thereof, it is characterized in that the down curved bottom that places shaft [6] of flue [15] annular.

2. by the described multifunctional and energy-saving residential coal combustion of claim 1 boiler, it is characterized in that return pipe [9], be arranged on the inside line that shaft [6] lower flue [15] is turned.

Images