CN2849478Y

CN2849478Y - Vertical screw pipe high pressure heater with drainage cooling section

Info

Publication number: CN2849478Y
Application number: CN 200520075973
Authority: CN
Inventors: 何雨花; 蔡锡琮; 周桂荣; 杨书英; 张琴
Original assignee: Taixing Ningxing Machinery Of Nanjing Turbine & Electric Machinery Group
Current assignee: Taixing Ningxing Machinery Of Nanjing Turbine & Electric Machinery Group
Priority date: 2005-09-30
Filing date: 2005-09-30
Publication date: 2006-12-20
Anticipated expiration: 2015-09-30

Abstract

The utility model relates to a high efficiency and energy saving type high pressure heater for supplying water to a power station boiler, which is composed of a casing body and a pipe system, wherein the upper part of the inner cavity of the casing body is provided with a steam condensing segment, the lower part is provided with a water cooling segment and the top ends of a water inlet pipe and a water outlet pipe are provided with a water supplying inlet and a water supplying outlet. When superheated steam enters the casing body from the inlet, the supplying water in a main spiral pipe at the upper part is heated. After the steam is condensed into water, the hot water which is condensed can heat part supplying water in a drainage cold spiral pipe at the lower part and the condensed water which is used flows out of the casing body through a drainage water outlet 1. The utility model has the obvious advantages of low energy consumption, compact structure, small occupation area, consumption material saving, etc. The drainage water level and the drainage flow speed can be controlled severely, and the drainage end difference can be reduced severely.

Description

Band is dredged cold section just vertical Spiral-tube High Pressure Heater

Affiliated technical field

The utility model relates to a kind of high pressure firing equipment that reduces the thermal power plant energy consumption, specifically is that a kind of high-efficiency and energy-saving type band that is used for the station boiler feedwater is dredged cold section just vertical Spiral-tube High Pressure Heater.

Background technology

At present, the Spiral-tube High Pressure Heater of the same type great majority that use between the steam turbine locomotive of thermal power plant for only all the height of the section of condensing add, dredging cold section just vertical Spiral-tube High Pressure Heater as this band does not have open as yet, even the helix tube drain cooler of separated type is also extremely rare, wherein mainly exist the feedwater shunting, utilize hydrophobic preheating, feedwater refluxes and mixes all difficulties of sending into to being steam heated in this closed circuit of feedwater output, as: the restriction of factors such as pressure balance, heat exchange effect, flow, flow velocity, resistance sealing exists insoluble problem.Structurally also have following difficulty in addition: feed-water inlet goes to be heated in the top but will flow to bottom hydrophobic; Feedwater need be provided with involucrum by this heat transfer segment of hydrophobic heating (hydrophobic being cooled) and improve heat-transfer effect to improve hydrophobic flow velocity; Hydrophobicly must flow out in the involucrum externally, its outlet needs with cylindrical shell isolated, reduces the effect of hydrophobic cooling (feedwater is heated) to prevent hydrophobic short circuit.

Summary of the invention

The purpose of this utility model is in order to solve the technical barrier that prior art exists, and provides a kind of band to dredge cold section just vertical Spiral-tube High Pressure Heater.This device is on the basis that has accumulated the practice of long-term design various types high-pressure heater, and the section of condensing and thin cold section the two combining form are preferably taked in comprehensive data contrast on the books both at home and abroad, has played the separated type height and has added and dredge the inaccessiable effect of cooler.

This device is made up of housing and piping two large divisions, be by steam condense and two sections just vertical height of hydrophobic cooling add, the section of condensing is double-deck oval helix tube, be positioned at housing inner chamber upper support on water inlet pipe and outlet pipe, hydrophobic cooling section is an individual layer oval helix tube, be positioned at housing inner chamber lower support on inlet tube and outlet tube and return duct, isocon, water inlet pipe and outlet pipe top are provided with feed-water inlet and give water out.Hydrophobic zigzag flow process, hydrophobic exit seal flange seat form.

Giving the water entrance form is to establish isocon at water inlet pipe mouth to connect vertically downward and dredge cold section then through return duct vertically upward, send to main screwed pipe after the feedwater that water that was preheated and restricting orifice flow down is mixed and give Steam Heating, the feedwater after the heating is flowed out external through outlet pipe again.

Feedwater in the master's screwed pipe of top can be heated after superheated steam enters housing by import, after steam was condensed into water, the hot water that condenses again can be with the part feedwater heating in the thin cold screwed pipe in bottom, and the condensate water after being utilized is external by thin outflow through hydrophobic outlet.Hydrophobic its heat that flow out this moment is fully utilized, and hydrophobic being cooled dwindled drain approach.

It is low that the more common high-pressure heater of this device has energy consumption, compact conformation, and area occupied is few, consumes remarkable advantages such as material province, and can the hydrophobic water level of strict control, hydrophobic flow velocity and dwindle drain approach.

Description of drawings

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

Fig. 2 is a feedwater schematic flow sheet of the present utility model.

In shown in Fig. 1,2, hydrophobic outlet pipe 1, cold screwed pipe 3 is dredged in airtight and watertight padding 2, dredges cold section involucrum 4, cylindrical shell 5, ear formula bearing 6, steam inlet 7, main screwed pipe 8, return duct 9, lower flange 10, upper flange 11, restricting orifice 12, isocon 13, water inlet pipe 14, outlet pipe 15.

The specific embodiment

Shown in Figure 1, this device mainly is made up of housing and piping two 2 parts, divides for again in the piping by the steam-heated section of condensing with by thin cold section two-period form of condensate water heating and forms.

Shown in Fig. 1,2, the flow process of its feedwater heating is: when feeding water when a mouth flows into water inlet pipe 14, because of stopping of restricting orifice 12, it is downward that the feedwater of fraction will enter isocon 13, flow to the equipment bottom, through dredging cold screwed pipe 3, after the hydrophobic preheating of condensing of equipment bottom, again upwards through return duct 9, enter water inlet pipe 14 through elbow, cause these shunting feedwater to overcome and dredge cold section resistance, and upwards the power resources of backflow are in the pressure differential of restricting orifice both sides about in the of 12, promptly the pressure of restricting orifice upside is greater than the pressure of downside.This part feedwater through preheating flows in the main screwed pipe 8 after the feedwater that flows down through orifice mixes, and gives the Steam Heating that is entered by the c mouth, and the feedwater after the heating is flowed out external through outlet pipe 15 again.So promptly finished the flow process of whole feedwater in heater.

Hydrophobic flow process is the superheated steam that is entered by steam inlet c, heat the feedwater in the main screwed pipe 8 on top, become condensate water by the cooling cooling, the end section of inflow equipment, kept off outside dredging cold segment body by involucrum 4, must flow to by the water conservancy diversion stroke zig zag that designs by dredging cold section inlet, utilize hydrophobic heat fully to heat the feedwater of dredging in the cold screwed pipe 3, flow to bottom after the bottom bend pipe flows into hydrophobic outlet 1 and excretes.

The structure of this device is connected to an integral body by dismountable lower flange of going up with stud, takes stud apart, and takes the adpting flange below the airtight and watertight padding 2 apart, can extract out whole piping parts external.

Claims

1, a kind of band is dredged cold section just vertical Spiral-tube High Pressure Heater, form by housing and piping two large divisions, it is characterized in that steam condenses and two sections just vertical height of hydrophobic cooling add, the section of condensing is double-deck oval helix tube, be positioned at housing inner chamber upper support on water inlet pipe and outlet pipe, hydrophobic cooling section is an individual layer oval helix tube, is positioned at housing inner chamber lower support on inlet tube and outlet tube and return duct, isocon.

2, band according to claim 1 is dredged cold section just vertical Spiral-tube High Pressure Heater, it is characterized in that to the water entrance form it being to establish isocon at water inlet pipe mouth to connect vertically downward and dredge cold section then vertically upward through return duct, send to main screwed pipe after the feedwater that water that was preheated and restricting orifice flow down is mixed and give Steam Heating, the feedwater after the heating is flowed out external through outlet pipe again.

3, band according to claim 1 is dredged cold section just vertical Spiral-tube High Pressure Heater, it is characterized in that hydrophobic zigzag flow process, hydrophobic exit seal flange seat form.