CN201531898U

CN201531898U - Central tube flue gas double valve flap regulation valve

Info

Publication number: CN201531898U
Application number: CN2009200706495U
Authority: CN
Inventors: 王渭清
Original assignee: Zhongjiang Energy Recovery (Shanghai) Co Ltd
Current assignee: Zhongjiang Energy Recovery (Shanghai) Co Ltd
Priority date: 2009-04-17
Filing date: 2009-04-17
Publication date: 2010-07-21
Anticipated expiration: 2019-04-17

Abstract

The utility model is a central tube flue gas double valve flap regulation valve, including a fire-tube boiler, a smoke tube, a central tube, an electric actuating unit, a rotating shaft and a regulation valve, wherein, the regulation valve is composed of a first valve flap and a second valve flap, and is connected to the rotating shaft by the high temperature resistant bolts, the first valve flap and the second valve flap forms an angel of 90 degrees from each other, the first valve flap controls the high-temperature flue gas flow passing through the central tube, the second valve flap controls the low-temperature flue gas flow passing through the smoke tube; the rotating shaft perforates the smoke-box housing and is sealed by the axle sleeve between the housing, the electric actuating unit is in key connection with the rotating shaft. The utility model has advantages that it is provided at the exit of the boiler, most of the components are located in the low-temperature flue gas of 380 DEG C, is easy to operate, the central tube is provided in the fire tube boiler, is not liable to break up, the accommodation area is reduced, and the investment is reduced; compared with the existing central tube regulation valve, the double valve flap regulation valve improves the regulating range and sensitivity, shortens the regulated lagging reaction and can adapt to the behavior requirement of the large apparatus as the flue gas flow of the smoke tube and the central tube can be simultaneously modulated.

Description

Central tube flue gas bivalve lobe control valve

Technical field

The utility model relates to the adjusting of waste heat recovery multitubular boiler exit gas temperature, particularly a kind of central tube flue gas bivalve lobe control valve.

Background technology

The adjusting of waste heat recovery multitubular boiler exit gas temperature at present, traditional mode is in boiler one side a gas bypass to be set, directly guiding the part high-temperature flue gas at boiler inlet place into boiler export mixes with the low-temperature flue gas in exit, and the bypass amount that a high temperature butterfly valve is controlled bypass is set, thereby control mixed flue-gas temperature in bypass.Because high temperature butterfly valve exposes for a long time in 1100 ℃ high-temperature flue gas, operate often malfunctioningly, when installing load variations, be difficult to timely adjusting.Domestic now also have the less multitubular boiler of some unit scales to adopt central tube, in the central tube exit valve plug is set, the aperture of control centre's pipe, but the use ability is low, adjustable range is narrow, see Fig. 1 for details for shown in the existing central tube smoke regulating valve structural representation, comprise multitubular boiler 21, smoke pipe 22, central tube 23, electric performance device 24, valve rod 25 and valve plug 26.

Summary of the invention

Technical problem to be solved in the utility model is to provide a kind of central tube flue gas bivalve lobe control valve.Can regulate low-temperature flue gas flow by smoke pipe and the high-temperature flue gas flow by central tube simultaneously, make both assignment of traffic reach best purpose of regulating flue-gas temperature.

The utility model solves the problems of the technologies described above the technical scheme of being taked: a kind of central tube flue gas bivalve lobe control valve, comprise multitubular boiler, smoke pipe, central tube, electric performance device, rotating shaft and control valve, wherein, described control valve, form by first flap and second flap, be mounted in the rotating shaft with high temperature resistant bolt, first flap and second flap are mutually 90 °, the control of first flap is by the high-temperature flue gas flow of central tube, and the control of second flap is by the low-temperature flue gas flow of smoke pipe; The smoke box housing is passed in the rotating shaft that connects flap, and by sleeve sealing, electric performance device is connected with key with rotating shaft between rotating shaft and housing.

The beneficial effects of the utility model are:

1, traditional gas bypass is compared, and has saved the bypass and the high temperature butterfly valve in the outside, and the utility model is arranged on the exit of boiler, most of parts are in 380 ℃ the low-temperature flue gas, easy operating, and central tube is arranged in the multitubular boiler, not fragile, reduce floor space, reduce investment outlay;

2, compare with existing central tube control valve, double damper valve has improved adjustable range and sensitivity owing to regulate smoke pipe and central tube flue gas flow simultaneously, has shortened the after reaction of regulating, and can adapt to the working condition requirement of bigger device;

Description of drawings

Fig. 1 is the structural representation of existing central tube smoke regulating valve.

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

Fig. 3 is a schematic diagram of the present utility model.

Label declaration in the accompanying drawing

Among Fig. 1:

21-multitubular boiler 22-smoke pipe 23-central tube

24-electric performance device 25-valve rod 26-valve plug

Among Fig. 2,3:

1-multitubular boiler 2-smoke pipe 3-central tube

4-electric performance device 5-rotating shaft 6-first flap

7-second flap

The specific embodiment

Below in conjunction with accompanying drawing structure of the present utility model is described further.

See also shown in Fig. 2,3, central tube flue gas bivalve lobe control valve of the present utility model mainly is made up of multitubular boiler 1, smoke pipe 2, central tube 3, electric performance device 4, rotating shaft 5, first flap 6 and second flap 7, first flap 6 and the high temperature resistant bolt of second flap, 7 usefulness are mounted in the rotating shaft 5, first flap 6 and second flap 7 are mutually 90 °, 6 controls of first flap are by the high-temperature flue gas flow of central tube 3, and 7 controls of second flap are by the low-temperature flue gas flow of smoke pipe.The smoke box housing is passed in the rotating shaft 5 that connects flap, and by sleeve sealing, electric performance device 4 is connected with rotating shaft 5 usefulness keys between rotating shaft and housing.

Operation principle: first flap 6 and second flap 7 are mutually 90 °, and when first flap, 6 standard-sized sheets (being in level), second flap, 7 complete shut-downs (being in vertical state), high-temperature flue gas are fit to the device start-up all by central tube 3; When first flap, 6 complete shut-downs (being in vertical state), second flap, 7 standard-sized sheets (being in level), high-temperature flue gas are fit to the device peak load stage all by smoke pipe 2; During normal duty, first flap 6 and second flap 7 all have certain aperture, after making that the flue gas that passes through central tube 3 and smoke pipe 2 respectively mixes, temperature reaches the best requirement of technology, when load changes, mixed temperature is ensued variation, changing value is transformed into electric signal and is transferred to electric performance device 4, electric performance device 4 drives rotating shaft 5 and rotates, the aperture of first flap 6 and second flap 7 is changed along with the change of rotating shaft 5 angles, regulate the flow of high-temperature flue gas and low-temperature flue gas, make mixed flue-gas temperature remain on the technological requirement scope again.

Claims

1. a central tube flue gas bivalve lobe control valve comprises multitubular boiler, smoke pipe, central tube, electric performance device, rotating shaft and control valve, it is characterized in that:

Described control valve, form by first flap (6) and second flap (7), be mounted in the rotating shaft (5) with high temperature resistant bolt, first flap (6) is mutually 90 ° with second flap (7), first flap (6) control is by the high-temperature flue gas flow of central tube (3), and second flap (7) control is by the low-temperature flue gas flow of smoke pipe; The smoke box housing is passed in the rotating shaft (5) that connects flap, and by sleeve sealing, electric performance device (4) is connected with key with rotating shaft (5) between rotating shaft and housing.