CN2292974Y

CN2292974Y - Boiler water deaerating device

Info

Publication number: CN2292974Y
Application number: CN 97201124
Authority: CN
Inventors: 高南; 李楠; 王涛; 纪晓春
Original assignee: Central Iron and Steel Research Institute
Current assignee: Central Iron and Steel Research Institute
Priority date: 1997-02-04
Filing date: 1997-02-04
Publication date: 1998-09-30
Anticipated expiration: 2007-02-04

Abstract

The utility model belongs to the technical field of boiler water deoxidizing devices. In the utility model, the inner part of a shell body is provided with a cathode net and an anode net. The utility model is characterized in that both sides of the cathode net are provided with cathode spacer plates, both sides of the shell body are provided with shell body positioning grooves, the cathode net is tightly fixed on cathode net spacer plates in the shell body positioning grooves and is fixed in the shell body, the cathode net is connected with the shell body by a negative pole connecting line and the negative pole of a direct current voltage stabilizer, and the anode of the direct current voltage stabilizer is connected with the anode net. Compared with the prior art, the utility model has the characteristics of simple structure, low cost, good effect on oxygen removal and scale removal, no pollution, etc.

Description

Boiler water deaerating plant

The utility model belongs to the manufacturing field of boiler equipment. Is particularly suitable for manufacturing the oxygen removing equipment for reducing the content of the water dissolved oxygen in the boiler.

It is known that the dissolved oxygen of water in a low-pressure heat pipe type boiler has a strong corrosion effect on the boiler and a steel radiator, is a main factor of the accidents of pipe blockage and pipe explosion of the boiler, and the water used by the boiler needs to be deoxidized in order to eliminate the accidents. In the prior art, the methods for removing oxygen from boiler water mainly comprise the following methods, such as heat powerDeoxidizing, analytic deoxidizing, vacuum deoxidizing, deoxidizing steel scraps, deoxidizing sodium sulfite, and removing redox resin. However, these methods generally have the problems of large investment, high cost, troublesome operation, high labor intensity and the like. In addition, the patent of CN2038494U is published by the chinese patent office, which proposes an electrochemical oxygen remover, which utilizes the electrochemical principle, and forms an electrostatic field by applying a direct current through a cathode and an anode, when water passes through the electrostatic field, the dissolved oxygen in the water is polarized, and the oxygen is removed through the processes of reduction, precipitation, etc. There are three problems with this device. (1) During the operation of the device, because aluminum is adopted as an anode material, a layer of thicker, soft and porous AL (OH) is easily attached to the surface of the aluminum anode₃The products, thus seriously affecting the stability of the electric field and the strength of the electric field, must be removed or the anode must be renewed after a certain period of use, otherwise the oxygen scavenging effect is affected. (2) This equipment adopts the design of square chest formula structure, and rivers can not be even pass through the electric field, consequently need install a circulating pump additional for equipment cost increases. (3) Thedevice has a narrow service temperature range and is generally only suitable for the temperature range of 40-70 ℃.

The utility model aims at providing a boiler water deaerating plant which has simple structure, convenient operation, low operating cost, good deaerating effect and no pollution.

The utility model discloses the device is according to electrochemistry principle and this characteristic that the deoxidization effect is better, designs boiler water deoxidization device into the drum type, simple structure, reasonable moreover. The following detailed description is made with reference to the accompanying drawings: fig. 1 is a schematic structural diagram of the oxygen removing device of the present invention, and fig. 2 is a schematic sectional view of the oxygen removing device taken along the line a-a. In the attached drawing, 1 is a water inlet, 2 is a cathode net, 3 is an anode net, 4 is an upper cover plate, 5 is a fastening sealing piece, 6 is an insulating pipe, 7 is a bolt, 8 is an anode lead-in wire, 9 is a direct current voltage stabilizer, 10 is a sewage discharge outlet, 11 is an insulating pad, 12 is a cathode connecting wire, 13 is an anode net external metal column, 14 is a shell positioning groove, 15 is a shell, 16 is a water outlet, and 17 is a cathode separator.

The utility model discloses deaerating plant's constitution is installed negative pole net 2 in casing 15, has positive pole net 3 at the internally mounted of negative pole net 2. A sewage draining outlet 10 is arranged at the bottom of the shell 15, a water inlet 1 is arranged below the shell 15, a water outlet 16 is arranged on the upper side of the shell 15, an upper cover plate 4 is covered on the top of the shell 15 and is fastened by a bolt 7, it is characterized in that cathode mesh separators 17 are installed on both sides of the cathode mesh 2, housing positioning grooves 14 are installed on both sides of the inner side of the housing 15, the cathode mesh 2 is fixed in the housing 15 by the cathode mesh separators 17 fastened in the housing positioning grooves 14, meanwhile, the cathode net 2, the shell 15 and the cathode of the direct current voltage stabilizer 9 are connected by a cathode connecting wire 12, the bottom end of the anode net 3 installed in the cathode net 2 is padded with an insulating pad 11 of an isolation shell 15, the upper end of the anode net 3 is provided with an anode net external metal column 13 which is fixedly arranged on the central line of the upper cover plate 4 by an insulating tube 6 and a fastening sealing piece 5, the positive pole of the direct current voltage stabilizer 9 is connected with an external metal column 13 of the anode mesh through a positive pole lead-in wire 8. The water inlet 1 of the deaerator should be connected to the water inlet pipe and the water outlet 16 should be connected to the water inlet of the boiler. The separator consisting of the cathode mesh 2 and the cathode mesh separator 17 is installed in the casing 15, so that the casing 15 is divided into two parts by the separator, and thus the water flow entering the water inlet 1 not only passes through the cathode mesh 2 by 100%, but also the cathode mesh 2 plays a role in dispersing the water flow, so that the water flow can pass through the electric field more uniformly. The insoluble anode mesh 3 of the deaerator is made of an alloy. After the alternating current of 220V, 50Hz is transformed into direct current by direct current stabiliser 9, change into the direct current by positive inlet wire 8 and negative pole line 12 again, lead the electricity to this deaerator's positive negative terminal, after rivers are passed through negative pole net 2 and are dispersed the effect, evenly get into the double low voltage electrostatic field of constituteing jointly by negative pole net and positive pole net again to more abundant carry out the deoxidization to rivers through the water of deaerator, wherein water dissolves oxygen and takes place following reaction because of the effect of electric field in the negative pole district:

while Ca in water²⁺、Mg²⁺The ions are gathered towards the cathode area under the action of the electric field, and the following reactions occur:

ca (OH) produced₂And Mg (OH)₂The sediment can be periodically discharged through the drain outlet 10. Therefore, the oxygen removing device can effectively reduce the dissolved oxygen content of the water for the boiler, so that the oxygen content in the water is less than 0.1mg/L, and the effect of scale prevention is achieved.

Adopt the utility model discloses boiler water deaerating plant compares with prior art, has deaerating plant simple structure, convenient operation, and the application expense is few and can be effectual the effect of the content of reduction aquatic dissolved oxygen and scale control, and it is more important through this deaerating plant, can not have any harmful substance to generate at the deoxidization in-process, also does not have any harmful effects to quality of water.

Claims

1. A water deoxidizing device for boiler is composed of a casing (15) with a cathode net (2), an anode net (3) in the cathode net (2), a sewage draining outlet (10) at the bottom of the casing (15), a water inlet (1) under the casing (15), a water outlet (16) at the top of the casing (15), an upper cover plate (4) on the top of the casing (15) and fastened by bolts (7), and features that cathode net partitions (17) are installed at two sides of the cathode net (2), casing positioning slots (14) are installed at two sides of the inner side of the casing (15), the cathode net (2) is fixed in the casing (15) through the cathode net partitions (17) fastened in the casing positioning slots (14), and an insulating pad (11) for isolating the casing (15) is padded at the bottom end of the cathode net (3) installed in the cathode net (2), the upper end of the anode net (3) is provided with an anode net external metal column (13) which is fixedly arranged on the central line of the upper cover plate (4) by an insulating tube (6) and a fastening sealing piece (5).

2. The device according to claim 1, characterized in that a negative connection (12) connects the cathode mesh (2), the housing (15) and the negative pole of the direct current regulator (9).

3. The device according to claim 1, characterized in that the positive lead-in (8) connects the positive pole of the direct current potentiostat (9) to the external metal column (11) of the anode mesh.