CN201836852U

CN201836852U - Evaporator with independent circulation circuit

Info

Publication number: CN201836852U
Application number: CN2010205559480U
Authority: CN
Inventors: 丁虹; 王政; 毛军华; 龚菲
Original assignee: Wuxi Huaguang Boiler Co Ltd
Current assignee: Wuxi Huaguang Boiler Co Ltd
Priority date: 2010-10-11
Filing date: 2010-10-11
Publication date: 2011-05-18
Anticipated expiration: 2020-10-11

Abstract

The utility model provides an evaporator with an independent circuit, which is simple in design and manufacturing process and low in cost and can effectively reduce the temperature of flue gas. The technical scheme includes that the evaporator with an independent circulation circuit comprises a drum, a hearth, an overheater and an evaporator, the hearth includes three flues, and the overheater is arranged inside the third flue. The evaporator with an independent circulation circuit is characterized in that flue gas in the third flue of the hearth moves from bottom to top, the evaporator is disposed at the bottom of the third flue of the hearth, the bottom of the drum is connected to an inlet header at the bottom of the evaporator by a downcomer, and an outlet header on the top of the evaporator is connected with an upper steam space of the drum by an uptake duct.

Description

A kind of evaporimeter with the independent loops loop

Technical field

The utility model relates to the mechanical structure field of waste heat boiler, is specially a kind of evaporimeter with the independent loops loop.

Background technology

Owing to contain harmful substances such as hydrogen chloride and sulfur oxide in the flue gas that the consumer waste incineration boiler produces, need take certain effective measures to avoid the phenomenon of high temperature superheater generation high temperature corrosion, so the flue-gas temperature that superheater is advanced in general control when the design waste heat boiler is lower than 650 ℃.And the height that lifts boiler simply to increase furnace heating surface be very uneconomic, generally consider before high temperature superheater, to arrange one group of convection heating surface, i.e. evaporimeter for this reason.

And the refuse incineration exhaust-heating boiler evaporimeter of general vertical layout all adopts the form of flag formula heating surface, see Fig. 1, also be that heating surface directly links to each other with rear water wall, for setting up circulation, increase by a throttle 1 in its porch, among Fig. 1, also comprise evaporimeter 2, rear water wall 3, the shortcoming of this arrangement: the one, water circulation calculation is comparatively complicated, and the design of throttle 1 size is difficult; The 2nd, when making, rear water wall 3 must consider the placement of throttle 1, and also difficulty comparatively of the welding of throttle 1, so manufacturing process relative complex, cost height.

Summary of the invention

At the problems referred to above, the utility model provides a kind of evaporimeter with the independent loops loop, and its simplicity of design, manufacturing process is simple, cost is low, and can effectively reduce flue-gas temperature.

A kind of evaporimeter with the independent loops loop, its technical scheme is such: it comprises drum, burner hearth, superheater, evaporimeter, described burner hearth comprises three passages, described superheater is arranged in the burner hearth third channel, it is characterized in that: the bottom-up motion of described burner hearth third channel flue gas, described burner hearth the 3rd flue bottom is furnished with described evaporimeter, the bottom of described drum connects the inlet header case of described base of evaporator by down-comer, and the outlet collection case at described evaporimeter top connects the top air space of described drum by tedge.

It is further characterized in that: the horizontal tilt angle of the tube bank of described evaporimeter is greater than 5 °;

Each tube bank of described evaporimeter connects described inlet header case, outlet collection case separately;

The outlet collection case at the inlet header case of described base of evaporator, top is placed on described burner hearth, and is anchored on the hearth wall of described burner hearth respectively by support.

After adopting structure of the present utility model, the water of boiler drum bottom flows to the bottom inlet collection case of evaporimeter, water leads to the tube bank of evaporimeter then, absorb the heat of flue gas, become steam, flow into the top air space of drum from the outlet collection case at top by tedge again, its simplicity of design, manufacturing process is simple, cost is low, and can effectively reduce flue-gas temperature.

Description of drawings

Fig. 1 is the evaporation structure schematic diagram of existing waste heat boiler.

Fig. 2 is a front view structural representation of the present utility model.

The specific embodiment

See Fig. 2, it comprises drum 1, burner hearth, superheater, evaporimeter 2, burner hearth comprises three passages, be followed successively by: burner hearth first passage 3, burner hearth second channel 4, burner hearth third channel 5, the bottom-up motion of burner hearth third channel flue gas, superheater 2 comprises high temperature superheater 6, medium temperature overheater 7, low temperature superheater 8, it is arranged in the burner hearth third channel 5 successively from bottom to top, burner hearth the 3rd flue 5 bottoms are furnished with evaporimeter 2, the bottom of drum 1 is by the inlet header case 10 of down-comer 9 connection evaporimeters 2 bottoms, and the outlet collection case 11 at evaporimeter 2 tops connects the top air space of drums 1 by tedge 12.

The horizontal tilt angle of the tube bank 13 of evaporimeter 2 is greater than 5 °;

Each tube bank 13 of evaporimeter 2 connects inlet header case 10, outlet collection case 11 separately;

The outlet collection case 11 at the inlet header case 10 of evaporimeter 2 bottoms, top is placed on burner hearth, and is anchored on hearth wall 16 by support 14,15 respectively.17 outlets that enter economizer for flue gas among the figure; Arrow is a flue gas flow direction among Fig. 2.

Its operation principle is as follows: the water of drum 1 bottom flows to the bottom inlet collection case 10 of evaporimeter 2 by down-comer 9, water leads to the tube bank 13 of evaporimeter 2 then, absorb the heat of flue gas, become steam, because the horizontal tilt angle of tube bank 13 is greater than 5 °, be beneficial to steam and taken away smoothly, thereby steam flows into the top air space of drum 1 by tedge 12 from the outlet collection case 11 at top by tedge 12.

Claims

1. evaporimeter with the independent loops loop, it comprises drum, burner hearth, superheater, evaporimeter, described burner hearth comprises three passages, described superheater is arranged in the burner hearth third channel, it is characterized in that: the bottom-up motion of described burner hearth third channel flue gas, described burner hearth the 3rd flue bottom is furnished with described evaporimeter, the bottom of described drum connects the inlet header case of described base of evaporator by down-comer, and the outlet collection case at described evaporimeter top connects the top air space of described drum by tedge.

2. a kind of evaporimeter with the independent loops loop according to claim 1 is characterized in that: the horizontal tilt angle of the tube bank of described evaporimeter is greater than 5 °.

3. a kind of evaporimeter with the independent loops loop according to claim 1 and 2 is characterized in that: each tube bank of described evaporimeter connects described inlet header case, outlet collection case separately.

4. a kind of evaporimeter with the independent loops loop according to claim 3 is characterized in that: the outlet collection case at the inlet header case of described base of evaporator, top is placed on described burner hearth, and is anchored on the hearth wall of described burner hearth respectively by support.