CN211011311U - H-shaped economizer device - Google Patents

Abstract

The utility model discloses an H-shaped economizer device, which comprises a water tank, an impurity removing device, a water storage tank and an economizer which are communicated in sequence; a water level sensor is arranged in the water tank, a water inlet pipe of the water tank is communicated with a water outlet end of the boiler, and a water replenishing pipe of the water tank is communicated with a tap water pipe; the water tank is communicated with the impurity removing device through a first water pump; the water storage tank is communicated with the economizer through a second water pump and a third water pump which are arranged in parallel; a heat exchange tube for exchanging heat with the flue gas is arranged in the economizer, the water inlet end of the heat exchange tube is communicated with the water inlet pipe connecting pipe, and the water outlet end of the heat exchange tube is communicated with the water outlet pipe connecting pipe; the water inlet pipe is connected with the water outlet of the impurity removing device through a pipeline, the water outlet pipe is connected with the descending pipe, and the descending pipe is provided with a temperature sensor.

Description

H-shaped economizer device

Technical Field

The utility model belongs to the technical field of the economizer, concretely relates to H type economizer device.

Background

The Economizer (Economizer) is a device which is arranged at the lower part of a flue at the tail part of a boiler and is used for recovering the waste heat of exhausted smoke, water fed by the boiler is heated into a heating surface of saturated water under the pressure of a steam drum, and the Economizer is called as the Economizer because the Economizer absorbs the heat of high-temperature smoke, reduces the exhaust temperature of the smoke, saves energy and improves the efficiency.

The steel pipe type economizer is not limited by pressure, can be used as a boiling type economizer and is generally made of carbon steel pipes with the outer diameter of 32-51 mm. Fins and fins are sometimes added to the tube to improve heat transfer. The steel pipe type economizer consists of parallel elbow pipes (commonly called coiled pipes) which are horizontally arranged.

The existing H-shaped economizer adopts a finned tube to strengthen the expansion heating surface of a heat transfer element, the heating surface of the smoke side of a water pipe can be greatly increased, and meanwhile, smoke forms strong turbulence when flowing through the surface of the H-finned tube, thereby playing the roles of improving the heat transfer efficiency and reducing the accumulation of soot.

The characteristics of the H-shaped economizer are as follows:

(1) self-cleaning ash

Because the H-shaped finned tube rib is of a cantilever structure, the fin rib vibrates under the impact action of airflow, so that the ash is difficult to accumulate. And strong turbulent flow scouring of the flue gas enables the H-shaped finned tube heat exchange element to have strong self-ash-cleaning capability.

(2) Wear-resistant

The H-shaped finned tubes are arranged in a row, the fin ribs divide the space into a plurality of small areas, the H-shaped finned tubes have a flow equalizing effect on air flow, and compared with light tubes and spiral finned tubes which are arranged in a staggered mode, the H-shaped finned tubes have the advantage that the abrasion service life is 3-4 times longer under the same conditions.

(3) High cost performance

Because the coal economizer adopts the H finned tube to strengthen the heat exchange element and has a vertical modularized arrangement structure, the overall investment cost of the coal economizer, such as manufacturing, installation, infrastructure and the like, is greatly reduced under the same steam yield and heat exchange area, the H finned tube coal economizer is 60-70 percent of the investment cost of the light tube waste heat boiler, and a larger space is provided for users in the aspect of equipment installation and arrangement.

Boiler water is led into and carries out the heat transfer in the economizer, because impurity is great in the boiler water, and the water consumption of boiler is very huge, leads to the impurity of aquatic constantly to accumulate, and impurity gets into economizer, steam pocket and over heater along with rivers in, combines with superheated steam, because the instability of impurity, easily splash, and the temperature is high, all has serious threat to equipment and personnel. Besides, when the economizer supplies water to the steam drum, strict requirements are imposed on the temperature of the water in the economizer, and the temperature of the water must be lower than the temperature of saturated water in the steam drum, otherwise, the operation of the steam drum is greatly influenced.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to the above-mentioned among the prior art not enough, provide an H type economizer device to solve impurity accumulation and the too high problem of temperature in the current H type economizer.

In order to achieve the purpose, the utility model adopts the technical proposal that:

an H-shaped economizer device comprises a water tank, an impurity removal device, a water storage tank and an economizer which are sequentially communicated; a water level sensor is arranged in the water tank, a water inlet pipe of the water tank is communicated with a water outlet end of the boiler, and a water replenishing pipe of the water tank is communicated with a tap water pipe; the water tank is communicated with the impurity removing device through a first water pump; the water storage tank is communicated with the economizer through a second water pump and a third water pump which are arranged in parallel; a heat exchange tube for exchanging heat with the flue gas is arranged in the economizer, the water inlet end of the heat exchange tube is communicated with the water inlet pipe connecting pipe, and the water outlet end of the heat exchange tube is communicated with the water outlet pipe connecting pipe; the water inlet pipe is connected with the water outlet of the impurity removing device through a pipeline, the water outlet pipe is connected with a down pipe, and a temperature sensor is arranged on the down pipe;

the temperature sensor and the water level sensor are both connected with a control system, and an AT89S51 chip is arranged in the control system; the DI6 pin of the AT89S51 chip is electrically connected with the water level sensor, and the temperature sensor is connected with the DI3 pin; the DO1 end and the 24V power end of the AT89S51 chip are connected with a coil of the relay KM 1; and a contact of the relay KM1 is used as a switch and is connected with a three-phase power source end of the second water pump.

Preferably, an electric valve is installed on the water replenishing pipe of the water tank.

Preferably, the electric valve is a DN50 electric flange butterfly valve.

Preferably, the second pump is located on one pipe and the third pump is located on the other pipe.

Preferably, the impurity removing device is FYH-10 water softening equipment.

Preferably, the temperature sensor is a PT100 thermal resistance temperature sensor.

Preferably, the water level sensor is a 24V MIK-P260 water level sensor.

The utility model provides a H type economizer device has following beneficial effect:

the utility model is provided with the impurity removing device, which can effectively remove the impurities in the boiler water supply and soften the water quality; and on the premise of the same heat exchange quantity, the water temperature in the downcomer after heat exchange is reduced to be lower than the saturated water temperature in the steam drum, so that the normal work of the economizer and the subsequent steam drum is ensured.

Drawings

Fig. 1 is a schematic block diagram of an H-type economizer apparatus.

Fig. 2 is a water supply schematic diagram of an H-type economizer apparatus.

Fig. 3 is a circuit diagram of a chip control circuit of the H-type economizer device AT89S 51.

Wherein, 1, a water tank; 2. a first water pump; 3. a second water pump; 4. an impurity removal device; 5. a water storage tank; 6. a coal economizer; 7. a water replenishing pipe; 8. an electrically operated valve; 9. a water level sensor; 10. a down pipe; 11. a temperature sensor; 12. a water inlet pipe is connected with a pipe; 13. a heat exchange pipe; 14. a water outlet pipe is connected with a pipe; 15. and a third water pump.

Detailed Description

The following description of the embodiments of the present invention is provided to facilitate the understanding of the present invention by those skilled in the art, but it should be understood that the present invention is not limited to the scope of the embodiments, and various changes may be made apparent to those skilled in the art within the spirit and scope of the present invention as defined and defined by the appended claims.

According to an embodiment of the application, referring to fig. 1, the economizer 6 device of the present scheme comprises an economizer 6, a water storage tank 5, an impurity removing device 4 and a water tank 1 which are sequentially communicated.

The economizer 6 comprises a plurality of heat exchange tubes 13 arranged in the economizer, and the heat exchange tubes 13 are used for exchanging heat with boiler flue gas and heating water in the heat exchange tubes 13.

The water outlet end of the heat exchange tube 13 is communicated with a water outlet pipe connecting tube 14; the water inlet pipe connecting pipe 12 is communicated with a water outlet of the water storage tank 5 through a pipeline, the water outlet pipe connecting pipe 14 is communicated with the downcomer 10, the downcomer 10 is communicated with the steam pocket, and the downcomer 10 guides water after heat exchange of the economizer 6 into the steam pocket; the temperature sensor 11 is installed on the downcomer 10, and the temperature sensor 11 is a PT100 thermal resistor temperature sensor 11 and is used for acquiring water temperature information in the downcomer 10 in real time and transmitting the information to an external control system.

A water level sensor 9 is installed in the water tank 1, the water level sensor 9 is a 24V MIK-P260 water level sensor 9 and is used for collecting the current liquid level information in the water tank 1 in real time and transmitting the liquid level information to an external control system.

The inlet tube of the water tank 1 is communicated with the outlet of the boiler, namely the water in the boiler is led into the water tank 1, the water supplementing tube 7 of the water tank 1 is communicated with a tap water tube and used for supplementing the water in the water tank 1 in time, the electric valve 8 is installed on the water supplementing tube 7, and the electric valve 8 is a DN50 electric flange butterfly valve and used for controlling the opening and closing of the water supplementing tube 7.

The staff can control motorised valve 8 according to the 1 water level information of water tank that level sensor 9 gathered and open, and then moisturizes water tank 1, and this process can be operated by the manual work.

Through first water pump 2 intercommunication between water tank 1 and the edulcoration device 4 for pour the water in the water tank 1 into edulcoration device 4, can set up a plurality of edulcoration devices 4 as required.

The impurity removing device 4 is FYH-10 water softening equipment for removing impurities and heavy metal ions in water (hard water) to change the water into soft water. The impurity removing device 4 guides softened water into the water storage tank 5 for storage, and a plurality of impurity removing devices 4 can be arranged as required to ensure sufficient water in the water storage tank 51.

The water storage tank 5 is communicated with the economizer 6 through a second water pump 3 and a third water pump 15 which are arranged in parallel, and under the normal condition, only the third water pump 15 needs to be started. When the water temperature of the falling pipe 10 is higher than the preset value, the second water pump 3 is started to operate.

Wherein the water pump is an ISW80-250 water pump and is used for pumping out the water in the water storage tank 5.

The control system is installed in the monitoring room, selects an AT89S51 chip as a core element, electrically connects the DI6 pin of the AT89S51 chip with the water level sensor 9, and connects the temperature sensor 11 with the DI3 pin.

The DO1 end and the 24V power end of the AT89S51 chip are connected with a coil of the relay KM 1; the contact of the relay KM1 is used as a switch and is connected with the three-phase power source end of the second water pump 3.

The water level information of the water tank 1 and the outlet water temperature information of the economizer 6 are uploaded to a control system in real time, and if the current water level information of the water tank 1 is low, a worker can manually control the electric valve 8 to replenish water into the water tank 1.

If the current outlet water temperature is higher than the preset temperature value, the AT89S51 chip controls the coil of the relay KM1 to be electrified, the contact of the relay KM1 is closed, the second pump is conducted with the three-phase power supply, the operation is started (AT the moment, the second water pump 3 and the third water pump 15 supply water to the economizer 6 AT the same time), and the water supply to the economizer 6 is increased; on the premise of the same heat exchange quantity, the water quantity is increased, and the outlet water temperature can be reduced, so that the outlet water temperature of the economizer 6 is lower than the temperature of saturated water in the steam pocket.

The utility model is provided with the impurity removing device 4, which can effectively remove the impurities in the boiler water supply and soften the water quality; besides, the water temperature in the downcomer 10 of the economizer 6 is collected in real time, if the current water temperature is higher than the saturated water temperature in the steam drum, the second water pump 3 is controlled to be started, the water quantity entering the economizer 6 is increased, and then on the premise of the same heat exchange quantity, the water temperature in the downcomer 10 after heat exchange is reduced, so that the water temperature is lower than the saturated water temperature in the steam drum, and the normal work of the economizer 6 and the subsequent steam drum is ensured.

While the present invention has been described in detail with reference to the embodiments, the scope of the present invention should not be limited to the embodiments. Various modifications and changes may be made by those skilled in the art without inventive step within the scope of the appended claims.

Claims (7)

1. An H-shaped economizer device, characterized in that: comprises a water tank, an impurity removing device, a water storage tank and an economizer which are communicated in sequence; a water level sensor is arranged in the water tank, a water inlet pipe of the water tank is communicated with a water outlet end of the boiler, and a water replenishing pipe of the water tank is communicated with a tap water pipe; the water tank is communicated with the impurity removing device through a first water pump; the water storage tank is communicated with the economizer through a second water pump and a third water pump which are arranged in parallel; a heat exchange tube for exchanging heat with the flue gas is arranged in the economizer, the water inlet end of the heat exchange tube is communicated with the water inlet pipe connecting pipe, and the water outlet end of the heat exchange tube is communicated with the water outlet pipe connecting pipe; the water inlet pipe is connected with the water outlet of the impurity removal device through a pipeline, the water outlet pipe is connected with a down pipe, and a temperature sensor is arranged on the down pipe;

the temperature sensor and the water level sensor are both connected with a control system, and an AT89S51 chip is arranged in the control system; the DI6 pin of the AT89S51 chip is electrically connected with a water level sensor, and the temperature sensor is connected with the DI3 pin; the DO1 end and the 24V power supply end of the AT89S51 chip are connected with a coil of a relay KM 1; and the contact of the relay KM1 is used as a switch and is connected with a three-phase power source end of the second water pump.

2. The H-type economizer apparatus according to claim 1, wherein: and an electric valve is arranged on the water replenishing pipe of the water tank.

3. The H-type economizer apparatus according to claim 2, wherein: the electric valve is DN50 electric flange butterfly valve.

4. The H-type economizer apparatus according to claim 1, wherein: the second water pump is positioned on one pipeline, and the third water pump is positioned on the other pipeline.

5. The H-type economizer apparatus according to claim 1, wherein: the impurity removal device is FYH-10 water softening equipment.

6. The H-type economizer apparatus according to claim 1, wherein: the temperature sensor is a PT100 thermal resistance temperature sensor.

7. The H-type economizer apparatus according to claim 1, wherein: the water level sensor is a 24V MIK-P260 water level sensor.

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