CN2278858Y - Thermal or vacuum low-level deaerator - Google Patents

Abstract

The utility model relates to a low order deaerator used for supplying water for boilers, which comprises a degassing tower and an oxygen removing water tank. The lower part of the water tank is provided with a cavitation eliminating device composed of a plurality of layers of diversion bodies. When water level decreases, the diversion bodies can automatically close for preventing cavitation phenomena when the water level in the water tank is low, and the outlet the cavitation eliminating device is directly connected with the water supply pump of boilers. The utility model reduces the mounting height from 10-13m to 4-6m, saves workshop investment and can be conveniently installed; the utility model substitutes for high order heating power or vacuum deaerators and causes minitype boiler house thermodynamic systems to be simply and conveniently installed and operated.

Description

Heating power or vacuum type low level oxygen-eliminating device

The utility model is a kind of boiler feedwater with heating power or vacuum dust cather.

When boiler rating is all wanted deoxygenation during greater than 2T/h, otherwise serious oxygen corrosion will appear in boiler inner wall, influences safe operation of the boiler and service life.The low level oxygen-eliminating device of existing boiler feedwater has steel cuttings oxygen-eliminating device, chemical agent oxygen-eliminating device, desorption deaerator.But steel cuttings deoxygenation steel cuttings easily lumps, not easy-clear; The chemical agent deoxygenation is that the accuracy and the continuity of dosing is wayward; The effect of Deadsorbing and oxygen removing is difficult for grasping, and it is few again to handle the water yield.

What application was more at present is vacuum or thermal deaerator, but is high-order oxygen-eliminating device.The lowest water level of their deoxygenation water tank and the height of feed pump centreline space are not less than 6～7m, add oxygen-eliminating device body height 4～6m, and total height needs 10～13m, and its range of application is very limited.

The purpose of this utility model is exactly the weak point that overcomes vacuum or the high-order oxygen-eliminating device of heating power, makes its setting height(from bottom) reduce to 4～6m by 10～13m, and has designed a kind of low level oxygen-eliminating device.

The utility model is achieved by the following scheme its goal of the invention.

Regulation and stipulation both domestic and external for many years thinks that the difference in height of high-order deoxygenation water tank lowest water level and feed pump centreline space is the bigger the better, and the discrepancy in elevation helps water pump greatly and prevents high-temperature water cavitation destruction.Evidence is really not so, and head exists when static, hydrostatic head Lock-out when pump is moving, and at any one of downcomer, setting pressure table, its value is all negative pressure, and the high-temperature water in negative pressuren zone is vaporized rapidly, produces a large amount of steam bubbles, and carbonated drink is mixed into pump and produces cavitation.This shows that high-order deoxygenation water tank can not solve a pump cavitation difficult problem.

The utility model has designed a kind of cavitation cancellation element, can directly be connected with the water inlet of boiler feed pump, and reach the purpose that reduces setting height(from bottom).

Heating power of the present utility model or vacuum type low level oxygen-eliminating device, it comprises degassing tower, the deoxygenation water tank, leve automatic controller, the water tank fixed support, in deoxygenation water tank inner bottom part the cavitation cancellation element is set, cavitation cancellation element lower part outlet outer links to each other by the flange of screw with the water inlet of boiler feed pump.This cavitation cancellation element divides upper, middle, and lower part, top is that the recessed cambered surface circle in middle place is cursory, and the middle part is that the toroidal circle is cursory, and the bottom is perverse degree of lip-rounding outlet pipe, outlet matches with the water inlet of boiler feed pump, and the casing of outlet pipe horn mouth outer and deoxygenation water tank is affixed.Upper, middle, and lower part is on same vertical axis, and each diameter strengthens step by step.On last, middle part is cursory through hole is set, sold above cursory through hole be fixed on the middle part cursory on, selling the cursory through hole in middle part below is fixed on the horn mouth of bottom outlet pipe, the length of pin will make between three ones of the upper, middle and lower and leave exhalant canal, and the adjacent curved surfaces of upper, middle, and lower part is complementary.

The deaerating plant and the water tank of existing vacuum of the utility model utilization or the high-order oxygen-eliminating device of heating power, and be provided with the cavitation cancellation element in the bottom of water tank, both solved the difficult problem of feed pump cavitation, again the setting height(from bottom) of 10～13m is reduced to 4～6m, reduced floor space, the investment of saving factory building, and simple installation, operating condition is better.The utility model has replaced high-order heating power or vacuum dust cather, makes the miniature boiler room therrmodynamic system also can easy installation and operation.

Description of drawings of the present utility model is as follows.

Fig. 1 is a low level oxygen-eliminating device schematic diagram of the present utility model.

Fig. 2 touches the cutaway view of cancellation element for low level oxygen-eliminating device vapour.

Below in conjunction with description of drawings embodiment of the present utility model.

Referring to Fig. 1, the degassing tower 2 of the existing high-order oxygen-eliminating device of present embodiment utilization, deoxygenation water tank 1, the top of degassing tower 2 is equipped with round loam cake 4, be provided with on the top of loam cake 4 and remove pore 5, loam cake 4 is connected by flange 6 with degassing tower body top, and degassing tower body bottom is removed air cylinder 10 by flange 9 and dividing potential drop and is connected, and cylindrical shell 10 communicates with horizontal water tank 1.The top of degassing tower 2 is provided with water inlet pipe 3, and the appropriate location is provided with manhole 7.Cylindrical shell 15 tops of horizontal water tank 1 are provided with manhole 11, and the two ends of cylindrical shell 15 are ellipsoidal head 12.Side at end socket 12 has liquid level sensor 13 and glass tube water level meter 14, constitutes leve automatic controller.The effect of leve automatic controller is control oxygen-eliminating device water yield and inflow, water level is prescribed a time limit on ordinary water level in deaerator storage tank 1, the leve automatic controller action, make the intake pump stop operation of oxygen-eliminating device, this moment since oxygen-eliminating device still in water outlet, water tank 1 middle water level descends, when water level to ordinary water level down in limited time, the leve automatic controller action make intake pump again entry into service water level is risen.Establish a draining valve 17 in water tank cylindrical shell 15 bottoms.Water tank cylindrical shell 15 is by support 16 supportings.Water tank 1 inner bottom part also is provided with cavitation cancellation element 18, and cavitation cancellation element 18 lower part outlets 28 outers 27 link to each other by the flange of screw with the water inlet of boiler feed pump 20, and water pump 20 is driven by motor 21.The present embodiment is at 15 times two covers of assembling of water tank cylindrical shell electric-motor pump, and each electric-motor pump all links to each other with a cavitation cancellation element, and another water pump 22 is staggeredly placed with water pump 20 positions, and two cover electric-motor pumps directly are fixed on the support 19, two cover alternations.

Referring to Fig. 2, this cavitation cancellation element divides upper, middle, and lower part.Top is that the recessed cambered surface circle in middle place 32 is cursory 23, and it can stop that the water in the water tank directly enters in the pump from top to bottom, causes that vapour, water mix to produce cavitation, and is recessed in the middle of cursory 23 forwards, can prevent from oppositely to form negative pressure.The middle part is cursory 25 for toroidal circle, and the bottom is perverse degree of lip-rounding outlet pipe 26, and outlet 28 matches with the water inlet of boiler feed pump 20, and the cylindrical shell 15 of outlet pipe 26 horn mouth outers 30 and deoxygenation water tank 1 is affixed.Upper, middle, and lower part 23,25,26 is on same vertical axis, and each diameter strengthens step by step.Go up, middle part 23,25 is provided with through hole on cursory, pin 24 is crossed and is gone up cursory 23 through hole and be fixed on the middle part cursory 25, the through holes that pin 31 is crossed middle part cursory 25 are fixed on the horn mouth of bottom outlet pipe 26.The length of pin 24,31 will make between three ones 23 of upper, middle and lower, 25,26 and leave exhalant canal.The adjacent curved surfaces of upper, middle, and lower part 23,25,26 is complementary.More than three parts constitute multilayer baffle formula cavitation cancellation element 18, when the water in the water tank 1 can play shunting during at ordinary water level, make current smooth and easy, the part does not have the effect of negative pressure.Its current scatter by last cursory 23, part current can flow to the passage between cursory 23 and 25, middle duct 29 through cursory 25 is to dirty, another part current also can flow to the passage of middle part cursory 25 and 26 of horn mouth outlet pipes, the water of shunting forms laminar flow, and the outlet 28 through 26 enters the pump housing 20.When the water level in the water tank 1 drops to low level, upward, cursory 23,25 loss of buoyance in middle part sink, because the coupling of the spacing and adjacent cambered surface of upper, middle, and lower part that pin is 24,31 pairs cursory 23,25, and automatic blocking baffle 18, the water of having guaranteed deoxygenation water tank 1 does not have the generation of precipitation funnel when low level, avoided the cavitation phenomenons generation.

Claims (1)

1, a kind of heating power or vacuum type low level oxygen-eliminating device, it comprises degassing tower (2), deoxygenation water tank (1), leve automatic controller, water tank fixed support (16), it is characterized in that deoxygenation water tank (1) inner bottom part is provided with cavitation cancellation element (18), cavitation cancellation element (18) lower part outlet (28) outer (27) links to each other by the flange of screw with the water inlet of boiler feed pump (20), on this cavitation cancellation element divides, in, following three parts, top is the recessed cambered surface circle cursory (23) in middle place (32), the middle part is toroidal circle cursory (25), the bottom is thorn degree of lip-rounding outlet pipe (26), outlet (28) matches with the water inlet of boiler feed pump (20), outlet pipe (26) horn mouth outer (30) is affixed with the casing (15) of deoxygenation water tank (1), on, in, following three parts (23,25,26) on same vertical axis, each diameter strengthens step by step, on, middle part (23,25) on cursory through hole is set, the through hole of cursory (23) is fixed on the middle part cursory (25) on pin (24) mistake, the through hole that pin (31) is crossed middle part cursory (25) is fixed on the horn mouth of bottom outlet pipe (26), pin (24,31) length will make, in, following three ones (23,25,26) leave exhalant canal between, on, in, following three parts (23,25,26) adjacent curved surfaces is complementary.

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