CN203656903U

CN203656903U - Boiler blow-down drainage waste heat cascade utilization device

Info

Publication number: CN203656903U
Application number: CN201420014841.3U
Authority: CN
Inventors: 张立省; 徐文峰; 吴自香; 杨益臣; 王康连; 李锦喜
Original assignee: 山东金沂蒙生态肥业有限公司
Priority date: 2014-01-10
Filing date: 2014-01-10
Publication date: 2014-06-18

Abstract

The utility model discloses a boiler blow-down drainage waste heat cascade utilization device and belongs to the technical field of boilers. The device comprises a blow-down apparatus and a drainage apparatus. The blow-down apparatus comprises a periodic blow-down flash tank and a boiler body blow-down unit, a continuous blow-down and a sewage treatment unit which are communicated with the periodic blow-down flash tank. The drainage apparatus comprises a drainage box a, a drainage box b, a boiler body drainage unit and a steam turbine unit and a steam turbine inlet and outlet drainage unit which are communicated with the drainage box a and the drainage box b through a drainage main tube and a de-aerator communicated with the drainage box a and the drainage box b. A heat exchanger is connected between the blow-down apparatus and the drainage apparatus, and a de-mineralized water inlet tube and a de-mineralized water outlet tube are arranged on the heat exchanger which is connected with the periodic blow-down flash tank and the de-aerator through a blow-down communication main tube and the de-mineralized water outlet tube respectively. By means of the device, heat of flash steam can be further recovered and can be used for improving the temperature of de-mineralized water outlet tube of the de-aerator, so that heat energy is saved.

Description

The hydrophobic exhaust heat stepped use device of boiler blow-off

Technical field

The utility model belongs to a kind of boiler equipment, specifically, relates in particular to the hydrophobic exhaust heat stepped use device of a kind of boiler blow-off.

Background technology

In the face of the increasingly serious energy and pollution challenge, the road of walking energy-conserving and environment-protective is to allow the only way which must be passed in Business survival and development, at present, boiler blow-off steam trap connection is deposited defect both ways, on the one hand, boiler drain tank and boiler body are fixed, platoon sewage temperature is higher, and a large amount of direct emptying of flash steam, causes energy waste; On the other hand, change approximately 30 ℃ of the demineralized water temperature that water conservancy project order comes, entering before boiler, must enter oxygen-eliminating device, with being steam heated to uniform temperature (145 ℃), except the oxygen in anhydrating, and then with high pressure water pump, pressurize and deliver to boiler, heat so need to consume a large amount of steam in producing.

Utility model content

The purpose of this utility model is to avoid above-mentioned weak point of the prior art, and provides a kind of boiler blow-off hydrophobic exhaust heat stepped use device, improves pre-heat effect, further reclaim the heat of flash steam, reduce the temperature of dropping a hint, improve into oxygen-eliminating device demineralized water temperature, with saving heat energy.

Of the present utility model being achieved through the following technical solutions: the hydrophobic exhaust heat stepped use device of boiler blow-off comprises blowdown apparatus and steam trap connection, blowdown apparatus comprises regular unloading container, be communicated with boiler body blowdown and the platoon blowdown of regular unloading container, be communicated with the sewage-treatment plant of regular unloading container, steam trap connection comprises drain tank a, drain tank b, the boiler body that is communicated with drain tank a and drain tank b by bilge main is hydrophobic hydrophobic with steam turbine import and export, be communicated with the oxygen-eliminating device of drain tank a and drain tank b, between blowdown apparatus and steam trap connection, be also connected with heat exchanger, heat exchanger is provided with demineralized water inlet line and demineralized water outlet line, heat exchanger is connected respectively regular unloading container and oxygen-eliminating device by the house steward of emptying UNICOM with demineralized water outlet line.

The house steward of emptying UNICOM is also communicated with drain tank a, drain tank b by blow-down pipe a, blow-down pipe b.

On heat exchanger, be also connected with blow-down pipe c, blowdown pipeline.

Compared with prior art, the beneficial effects of the utility model are:

1, utilize waste heat to heat demineralized water, make demineralized water temperature rise to 67 ℃ by 30 ℃, reduce oxygen-eliminating device live steam amount, energy-saving effect is obvious;

2, reduced the emptying temperature that boiler is determined platoon sewage and various hydrophobic flash steams.

Accompanying drawing explanation

Fig. 1 is schematic flow sheet of the present utility model.

In figure, 1, boiler body blowdown; 2, platoon blowdown; 3, blowdown main; 4, regular unloading container; 5, blow-off pipe; 6, sewage-treatment plant; 7, demineralized water outlet line; 8, boiler body is hydrophobic; 9, steam turbine is imported and exported hydrophobic; 10, bilge main; 11, blow-down pipe a; 12, blow-down pipe b; 13, drain tank a; 14, drain tank b; 15, condensed water house steward; 16, oxygen-eliminating device; 17, the house steward of emptying UNICOM; 18, blow-down pipe c; 19, demineralized water inlet line; 20, heat exchanger; 21, blowdown pipeline.

The specific embodiment

Below in conjunction with drawings and Examples, the utility model is described further.

As shown in Figure 1, the hydrophobic exhaust heat stepped use device of boiler blow-off comprise blowdown apparatus, steam trap connection and be located at blowdown apparatus and steam trap connection between heat exchanger 20.Blowdown apparatus comprises boiler body blowdown 1, platoon blowdown 2, regular unloading container 4, sewage-treatment plant 6, boiler body blowdown 1 and platoon blowdown 2 are communicated with regular unloading container 4 by blowdown main 3, and sewage-treatment plant 6 is communicated with regular unloading container 4 by blow-off pipe 5; Steam trap connection comprises that drain tank a13, drain tank b14, boiler body are hydrophobic 8, steam turbine is imported and exported hydrophobic 9, oxygen-eliminating device 16, boiler body hydrophobic 8 and steam turbine are imported and exported hydrophobic 9 and are communicated with drain tank a13 and drain tank b14 by bilge main 10, and drain tank a13 and drain tank b14 are communicated with oxygen-eliminating device 16 by condensed water house steward 15; Heat exchanger 20 is connected respectively regular unloading container 4 and oxygen-eliminating device 16 by the house steward of emptying UNICOM 17 with demineralized water outlet line 7.

The house steward of emptying UNICOM 17 is also communicated with drain tank a13, drain tank b14 by blow-down pipe a11, blow-down pipe b12.

Heat exchanger 20 is provided with demineralized water inlet line 19, blow-down pipe c18, blowdown pipeline 21.

The utility model course of work: enter in heat exchanger 20 pipes from the cold demineralized water of changing water conservancy project section, and carry out heat exchange from the flash steam of drain tank a13, drain tank b14 and regular unloading container 4 between pipe, demineralized water after heating enters oxygen-eliminating device 16, after flash steam cooling, condensate liquid reclaims and enters oxygen-eliminating device 16, and not solidifying gas is emptying.The utility model uses the unwatering steam heated of drain tank, regular unloading container 4 to enter the demineralized water of oxygen-eliminating device 16, improve into the preheat temperature of oxygen-eliminating device 16 demineralized waters, improve demineralized water preheat temperature, reduce steam consumption in oxygen-eliminating device 16 processes, reduce waste heat waste, saved the energy.The present embodiment is optimal case of the present utility model, but is not limited in this.

Claims

1. the hydrophobic exhaust heat stepped use device of boiler blow-off, comprise blowdown apparatus and steam trap connection, described blowdown apparatus comprises regular unloading container (4), be communicated with boiler body blowdown (1) and the platoon blowdown (2) of regular unloading container (4), be communicated with the sewage-treatment plant (6) of regular unloading container (4), described steam trap connection comprises drain tank a(13), drain tank b(14), be communicated with drain tank a(13) and drain tank b(14) boiler body hydrophobic (8) and steam turbine import and export hydrophobic (9), be communicated with drain tank a(13) and drain tank b(14) oxygen-eliminating device (16), it is characterized in that: between described blowdown apparatus and steam trap connection, be connected with heat exchanger (20), described heat exchanger (20) is provided with demineralized water inlet line (19) and demineralized water outlet line (7), heat exchanger (20) is connected respectively regular unloading container (4) and oxygen-eliminating device (16) by the house steward of emptying UNICOM (17) with demineralized water outlet line (7).

2. the hydrophobic exhaust heat stepped use device of boiler blow-off according to claim 1, is characterized in that: the described emptying house steward of UNICOM (17) is also by blow-down pipe a(11), blow-down pipe b(12) with drain tank a(13), drain tank b(14) be communicated with.

3. the hydrophobic exhaust heat stepped use device of boiler blow-off according to claim 1, is characterized in that: described heat exchanger is communicated with blow-down pipe c(18 on (20)), blowdown pipeline (21).