阅读说明：本技术 一体化节能高炉鼓风脱湿系统 (Integrated energy-saving blast furnace blast dehumidification system ) 是由 余波 王浩 严厚华 张学超 王荣生 张华钢 杨智勇 于 2020-06-18 设计创作，主要内容包括：本发明公开一种一体化节能高炉鼓风脱湿系统,包括依次连接的过滤器、脱湿器,脱湿器包括依次连接的喷淋室、表冷器和缓冲室,在喷淋室、缓冲室下部有集水槽,喷淋室设置有喷头,表冷器进水口与制冷机组出水口连通,表冷器出水口通过冷冻水泵与制冷机组的进水口连通,水池位于冷却塔下方,制冷机组的冷媒进口与水池的出水口连通,制冷机组的冷媒出口通过第一管路连通至冷却塔内,还包括第一自动排水装置、冷凝水泵、冷凝水箱,第一自动排水装置与缓冲室内的集水槽连通,冷凝水泵的出水口通过第四管路与喷淋室的喷头连通。本发明通过新增冷凝水回收利用系统和冷却空气加热系统,有效提高系统冷能利用,增加空气干度,保证系统节能,提高系统安全性。(The invention discloses an integrated energy-saving blast furnace blast dehumidification system, which comprises a filter and a dehumidifier which are connected in sequence, wherein the dehumidifier comprises a spray chamber, a surface cooler and a buffer chamber which are connected in sequence, water collecting tanks are arranged at the lower parts of the spray chamber and the buffer chamber, a spray head is arranged in the spray chamber, a water inlet of the surface cooler is communicated with a water outlet of a refrigerating unit, a water outlet of the surface cooler is communicated with a water inlet of the refrigerating unit through a refrigeration water pump, a water tank is positioned below a cooling tower, a refrigerant inlet of the refrigerating unit is communicated with a water outlet of the water tank, a refrigerant outlet of the refrigerating unit is communicated into the cooling tower through a first pipeline, the integrated energy-saving blast furnace blast dehumidification system also comprises a first automatic drainage device, a condensate water pump and a condensate water tank, the first automatic drainage device is communicated with the water collecting tank in the buffer chamber. According to the invention, by additionally arranging the condensate water recycling system and the cooling air heating system, the utilization of the cold energy of the system is effectively improved, the air dryness is increased, the energy conservation of the system is ensured, and the safety of the system is improved.)

1. An integrated energy-saving blast furnace blast dehumidification system is characterized by comprising a filter and a dehumidifier which are sequentially connected, wherein the dehumidifier comprises a spray chamber, a surface cooler and a buffer chamber which are sequentially connected, water collecting tanks are arranged at the lower parts of the spray chamber and the buffer chamber, a spray head is arranged in the spray chamber, a water inlet of the surface cooler is communicated with a water outlet of a refrigerating unit, a water outlet of the surface cooler is communicated with a water inlet of the refrigerating unit through a freezing water pump, a water tank is positioned below a cooling tower, a refrigerant inlet of the refrigerating unit is communicated with a water outlet of the water tank, a refrigerant outlet of the refrigerating unit is communicated into the cooling tower through a first pipeline (A),

And the spray chamber also comprises a first automatic drainage device, a condensate water pump and a condensate water tank, wherein the first automatic drainage device is communicated with the water collecting tank in the buffer chamber, the first automatic drainage device, the condensate water tank and the condensate water pump are sequentially communicated, and a water outlet of the condensate water pump is communicated with the spray head of the spray chamber through a fourth pipeline (D).

2. The integrated energy-saving blast furnace blast dehumidification system according to claim 1, further comprising a gas-water heat exchanger, wherein the gas-water heat exchanger is connected between the buffer chamber and the suction inlet of the blast machine, the refrigerant outlet of the refrigerating unit is branched into a second pipeline (B) which is communicated with the water inlet of the gas-water heat exchanger, the water outlet of the gas-water heat exchanger is communicated with the cooling tower after being merged with the first pipeline (A), and air coming out of the buffer chamber enters the suction inlet of the blast machine after being heated by the gas-water heat exchanger.

3. The integrated energy-saving blast furnace blower dehumidifying system as claimed in claim 1, wherein the outlet pipeline of the condensate pump is branched off from a third pipeline (C) and merged with the refrigerant outlet pipeline of the refrigerating unit.

4. The integrated energy-saving blast furnace air-blast dehumidification system as claimed in claim 1, wherein the condensed water tank is provided with a liquid level and a condensed water pump for interlocking control, the condensed water tank is provided with a normal water level, a minimum water level and a maximum water temperature, the condensed water pump is automatically turned off when the water level is lower than the minimum water level, the condensed water pump is turned on again when the water level reaches the normal water level, and an alarm is given when the water level reaches the maximum water level.

5. The integrated energy saving blast furnace blast dehumidification system according to claim 1, wherein the spray head comprises a rotary atomizing nozzle, and the SMD of the spray is controlled to be less than 100 μm.

6. The integrated energy-saving blast furnace blast dehumidification system according to claim 1, further comprising a second automatic drainage device, a drainage tank and a drainage pump which are sequentially communicated, wherein the second automatic drainage device is communicated with a water collection tank in the spray chamber, and a water outlet of the drainage pump is communicated to a water outlet pipeline of the gas-water heat exchanger through a pipeline and is jointly returned to the cooling tower.

7. The integrated energy-saving blast furnace blast dehumidification system according to claim 1, wherein a plurality of water baffles extending downwards into the spray chamber in a vertical direction at intervals are arranged at the air inlet of the surface cooler, so that the lower end of each water baffle is positioned in the spray chamber, and the bottom of the upper water baffle is lower than the top of the adjacent lower water baffle to ensure partial overlapping;

the gas outlet of surface cooler is provided with a plurality of breakwaters that incline downwardly extending to the surge chamber along vertical interval for the low one end of breakwater is located the surge chamber, and the bottom of upper breakwater is less than adjacent lower floor's breakwater top, guarantees that the part overlaps.

8. The integrated energy-saving blast furnace blast dehumidification system as claimed in claim 2, wherein the heat exchange area of the gas-water heat exchanger is 1/5-1/3 of the heat exchange area of the surface cooler.

9. The integrated energy-saving blast furnace blast dehumidification system according to claim 2, wherein the gas-water heat exchanger is a low fin heat exchanger.

10. The integrated energy-saving blast furnace blast dehumidification system according to claim 6, wherein said first automatic drainage device and said second automatic drainage device are provided with a drainage ball cock, and when the water level in the water collection tank exceeds a set level, the ball cock is opened to automatically drain the water.

Technical Field

The invention relates to an integrated energy-saving blast furnace blast dehumidification system, which aims to realize energy saving of the dehumidification system by recycling condensed water for primary air cooling and heating dehumidified cold air by cooling circulating water to realize demisting and drying.

Background

The blast furnace blast dehumidification is to condense water vapor in air by cooling the air entering the blast furnace blower, so as to reduce the water content of the air entering the blast furnace. The humidity of the air entering the blast furnace can be relatively stable through dehumidification, the fluctuation of the combustion flame in the blast furnace can be effectively reduced, and the production of the blast furnace is stabilized.

The conventional blast furnace blast dehumidification system adopts a refrigerator to prepare low-temperature chilled water, the chilled water at the outlet of the refrigerator enters a dehumidifier to exchange heat with air, the air is cooled to a certain temperature to reach a saturated state, and condensed water in the air is separated out, so that the absolute moisture content of the air is reduced. The cooling air enters the air blower through the demister, and condensed water is collected by the water collecting tank and then sent to the cooling tower for water supplement. The condensed water in the system is lower in temperature and is directly sent to the cooling tower for water supplement, and the part of cold energy is not utilized. The demister is arranged behind the dehumidifier, and the resistance of the demister is relatively large. In engineering, the volume of the dehumidifier is increased, the air flow rate in the dehumidifier is reduced, and the dehumidifier adopts a mode of wrapping a heat exchanger tube by a hydrophilic aluminum foil, so that the dehumidifier can supplement and collect condensed liquid water. The method results in a dehumidifier with a large volume and high equipment cost.

Disclosure of Invention

In order to solve the problems, the invention provides an integrated energy-saving blast furnace blast dehumidification system, which can efficiently utilize a system cold source, improve the energy utilization efficiency and reduce the equipment cost. The scheme is specifically adopted as follows:

an integrated energy-saving blast furnace blast dehumidification system comprises a filter and a dehumidifier which are connected in sequence, wherein the dehumidifier comprises a spray chamber, a surface cooler and a buffer chamber which are connected in sequence, water collecting tanks are arranged at the lower parts of the spray chamber and the buffer chamber, a spray head is arranged in the spray chamber, the water inlet of the surface cooler is communicated with the water outlet of a refrigerating unit, the water outlet of the surface cooler is communicated with the water inlet of the refrigerating unit through a freezing water pump, the water tank is positioned below a cooling tower, the refrigerant inlet of the refrigerating unit is communicated with the water outlet of the water tank, the refrigerant outlet of the refrigerating unit is communicated into the cooling tower through a first pipeline (A),

and the spray chamber also comprises a first automatic drainage device, a condensate water pump and a condensate water tank, wherein the first automatic drainage device is communicated with the water collecting tank in the buffer chamber, the first automatic drainage device, the condensate water tank and the condensate water pump are sequentially communicated, and a water outlet of the condensate water pump is communicated with the spray head of the spray chamber through a fourth pipeline (D).

Preferably, the air-water heat exchanger is connected between the buffer chamber and the suction inlet of the air blower, a second pipeline (B) is branched from a refrigerant outlet of the refrigerating unit and communicated with a water inlet of the air-water heat exchanger, a water outlet of the air-water heat exchanger is converged with the first pipeline (A) and then communicated to the cooling tower, and air coming out of the buffer chamber is heated by the air-water heat exchanger and then enters the suction inlet of the air blower.

Preferably, the outlet pipeline of the condensed water pump is branched to a third pipeline (C) to be merged to the refrigerant outlet pipeline of the refrigerating unit.

Preferably, the condensed water tank is set with a liquid level and is controlled by a condensed water pump in a linkage manner, the condensed water tank is set with a normal water level, a lowest water level and a highest water temperature, the condensed water pump is automatically turned off when the water level is lower than the lowest water level, the condensed water pump is turned on again when the water level reaches the normal water level, and an alarm is given when the water level reaches the highest water level.

Preferably, the spray head comprises a rotary atomizing nozzle, and the SMD of the spray is controlled to be less than 100 μm.

Preferably, the cooling tower further comprises a second automatic drainage device, a drainage tank and a drainage pump which are sequentially communicated, wherein the second automatic drainage device is communicated with the water collecting tank in the spraying chamber, and a water outlet of the drainage pump is communicated to a water outlet pipeline of the gas-water heat exchanger through a pipeline and returns to the cooling tower together.

Preferably, a plurality of water baffles which obliquely extend downwards into the spraying chamber at intervals along the vertical direction are arranged at the air inlet of the surface air cooler, so that the lower end of each water baffle is positioned in the spraying chamber, the bottom of the upper water baffle is lower than the top of the adjacent lower water baffle, and partial overlapping is ensured;

The gas outlet of surface cooler is provided with a plurality of breakwaters that incline downwardly extending to the surge chamber along vertical interval for the low one end of breakwater is located the surge chamber, and the bottom of upper breakwater is less than adjacent lower floor's breakwater top, guarantees that the part overlaps.

Preferably, the heat exchange area of the gas-water heat exchanger is 1/5-1/3 of the heat exchange area of the surface cooler.

Preferably, the gas-water heat exchanger adopts a low-fin heat exchanger.

Preferably, the first automatic drainage device and the second automatic drainage device are both provided with a drainage ball float valve, and when the water level in the water collecting tank exceeds a set height, the ball float valve is opened to automatically drain the water.

According to the integrated energy-saving blast furnace blast dehumidification system, the condensate water recycling system and the cooling air heating system are additionally arranged, so that the cold energy utilization level of the system is effectively improved, the unit energy consumption is reduced, the system resistance is reduced, the size of a dehumidifier is reduced, the dryness of cooling air is increased, the energy conservation of the system is ensured, and the system safety is improved. Compared with the conventional dehumidifier with low flow rate, the flow rate of the dehumidifier of the embodiment can be more than 1.5 times of the flow rate of the conventional dehumidifier, a demister behind the dehumidifier is eliminated, and the air side resistance of the whole system is basically unchanged. But the volume of the equipment is reduced by more than 30 percent, and the manufacturing cost and the steel quantity of the whole dehumidifier can be obviously reduced. Through the recovery and utilization of the condensed water and the cold air reheating system, the whole dehumidifying system can save energy by 3% -7%, and compared with a conventional dehumidifying system, the system can save energy obviously.

Drawings

The above features and technical advantages of the present invention will become more apparent and readily appreciated from the following description of the embodiments thereof taken in conjunction with the accompanying drawings.

FIG. 1 is a process flow diagram showing an integrated energy efficient blast furnace blast dehumidification system in accordance with an embodiment of the present invention;

FIG. 2 is a front view showing a dehumidifier according to an embodiment of the present invention;

fig. 3 is a partially enlarged view illustrating a water guard plate according to an embodiment of the present invention.

Detailed Description

An embodiment of the integrated energy saving blast furnace blast dehumidifying system according to the present invention will be described with reference to the accompanying drawings. Those of ordinary skill in the art will recognize that the described embodiments can be modified in various different ways, or combinations thereof, without departing from the spirit and scope of the present invention. Accordingly, the drawings and description are illustrative in nature and not intended to limit the scope of the claims. Furthermore, in the present description, the drawings are not to scale and like reference numerals refer to like parts.

The integrated energy-saving blast furnace blast dehumidification system comprises a dehumidification unit, wherein the dehumidification unit comprises a filter 1 and a dehumidifier 2, the filter 1 is sequentially connected with the dehumidifier 2, and air sequentially passes through the filter 1 and the dehumidifier 2, preferably, the dehumidifier 2 comprises a spray room 21, a surface air cooler 22 and a buffer room 23, and a plurality of spray heads for cooling air by spraying are arranged in the spray room 21. The air entering the spray chamber 21 is sprayed by spray water, so that the initial cooling of the air is realized, the cooling interval can reach 3-5 ℃, the spray water is partially settled to the water collecting tank, and partial water mist enters the surface air cooler 22 along with the air. It should be noted that although the present embodiment is described with air dehumidification, the present embodiment does not exclude other gases to be dehumidified.

The lower portions of the shower chamber 21, the surface cooler 22, and the buffer chamber 23 are provided with water collecting grooves, and the surface cooler 22 is circulated with cooling water to cool the air from the shower chamber 21. The water inlet of the surface cooler 22 is communicated with the water outlet of the refrigerating unit 11, and the refrigerating water is introduced into the surface cooler 22 for cooling the air, so that the moisture in the air is condensed into water mist which falls into the adjacent buffer chamber 23 and the spray chamber 21. The water outlet of the surface cooler 22 is communicated with the water inlet of the refrigerating unit 11 through the chilled water pump 10. The water tank 14 is located below the cooling tower 13, a refrigerant inlet of the refrigeration unit 11 is communicated with a water outlet of the water tank 14, and a refrigerant outlet of the refrigeration unit 11 is communicated into the cooling tower 13 through a first pipeline a. The cooling water exchanges heat with the refrigerant in the refrigerator unit 11, and the cooled cooling water enters the water inlet of the surface cooler 22 from the water outlet of the refrigerator unit 11. The refrigerant having been heated up is returned from the refrigerant outlet of the refrigeration unit 11 to the cooling tower 13 through the first pipe a.

The air passing through the surface air cooler 22 enters the buffer chamber 23 for arrangement, wherein the air flow arrangement is used for air flow arrangement to enable the air flow to be stable, the liquid drop sedimentation is used for a water collecting tank at the lower part of the buffer chamber 23 to be used for collecting condensed water. Air passing through the buffer chamber 23 can enter the blower inlet to supply air to the blower.

Further, the cooling air heating device comprises a cooling air heating unit, wherein the cooling air heating unit consists of a circulating water pipeline and an air-water heat exchanger 24, the air-water heat exchanger 24 is connected between the buffer chamber 23 and the air blower suction inlet, air coming out of the buffer chamber 23 is heated, and the heated air enters the air blower suction inlet. The refrigerant outlet of the refrigerating unit 11 is branched into a second pipeline B which is communicated with the water inlet of the gas-water heat exchanger 24, and the water outlet of the gas-water heat exchanger 24 is communicated to the cooling tower 13 after being converged with the first pipeline A. Thus, the refrigerant heated in the refrigeration unit 11 enters the gas-water heat exchanger 24 to heat the air, and the refrigerant with a reduced temperature returns to the cooling tower 13 from the water outlet. Compared with the dehumidifier 2, the heat exchange area of the gas-water heat exchanger 24 is 1/5-1/3 of that of the surface cooler 22, and the gas-water heat exchanger 24 is preferably a low-fin heat exchanger, so that a demister behind the dehumidifier 2 is replaced, and the purpose of cooling saturated air and heating the saturated air at 3-10 ℃ is realized.

Further, the spray room further comprises a condensate water recycling unit, the condensate water recycling unit comprises a first automatic drainage device 41, a condensate water pump 7 and a condensate water tank 8, the first automatic drainage device 41 is communicated with a water collecting tank in the buffer chamber 23, the first automatic drainage device 41, the condensate water tank 8 and the condensate water pump 7 are sequentially communicated, and a water outlet of the condensate water pump 7 is communicated with a spray head of the spray room through a fourth pipeline D. Further, the outlet pipeline of the condensate pump 7 is branched to form a third pipeline C, and the third pipeline C is converged to the refrigerant outlet pipeline of the refrigeration unit 11. Preferably, the condensed water tank is provided with a liquid level control chain with a condensed water pump, and the condensed water pump is preferably a variable frequency pump. Preferably, the spray head is preferably a rotary atomizing nozzle, and the spray droplet size SMD (sharp mean diameter) is preferably controlled to be less than 100 μm. Furthermore, the condensed water tank is provided with a liquid level and a condensed water pump which are controlled in a linkage manner, the condensed water tank is provided with a normal water level, a lowest water level and a highest water temperature, the condensed water pump is automatically closed when the water level is lower than the lowest water level, the condensed water pump is started again when the water level reaches the normal water level, and an alarm is given when the water level reaches the highest water level.

Further, the condensed water recycling unit further comprises a second automatic drainage device 42, a drainage pump 5 and a drainage tank 6, wherein the second automatic drainage device 42 is communicated with a water collecting tank in the spray chamber 21, the second automatic drainage device 42, the drainage tank 6 and the drainage pump 5 are sequentially communicated, and a water outlet of the drainage pump 5 is communicated to a water outlet pipeline of the gas-water heat exchanger through a pipeline and returns to the cooling tower 13 together. The automatic drainage device is provided with a drainage ball float valve, and when the liquid collecting height exceeds a set height, the ball float valve is opened to automatically drain liquid.

Further, a plurality of water baffles 221 which obliquely extend downwards into the spraying chamber along the vertical direction at intervals are arranged at the air inlet of the surface air cooler 22, so that the lower end of each water baffle 221 is positioned in the spraying chamber, the bottom of the water baffle 221 on the upper layer is lower than the top of the water baffle 221 on the adjacent lower layer, and partial overlapping is guaranteed. The gas outlet of surface cooler is provided with a plurality of breakwaters that incline downwardly extending to the surge chamber along vertical interval for the low one end of breakwater is located the surge chamber, and the bottom of the breakwater on upper strata is less than adjacent lower floor's breakwater top, guarantees that the part overlaps. Preferably, the overlap height h ≧ 50 mm. So that the mist colliding against the water guard may fall down into the water collection tub along the water guard 221. Specifically, the water mist from the air inlet falls into the water collecting tank of the spray chamber 21 after colliding with the water baffle, and the water mist from the air outlet flows into the water collecting tank in the buffer chamber 23 along the inclined water baffle after colliding with the water baffle 221.

According to the connection relationship of the pipelines, different processes can be realized by controlling the on-off of the pipelines. It is a common way to set valves on the pipelines to control the on/off of the pipelines, and no specific description is given, and three examples are described below to realize different processes.

Example 1

The conventional dehumidification process is as follows: air enters a dehumidifier 2 for dehumidification through a filter 1, and the dehumidified air is sent to a blast furnace blower through mechanical demisting; after the chilled water at the inlet of the dehumidifier 2 absorbs the heat of the air, the chilled water is sent to the evaporator of the refrigerating unit 11 through the chilled water pump 10 for cooling, and the cooled chilled water is sent to the dehumidifier 2 again to form a cycle;

the refrigerant cooled by the cooling tower 13 enters the water tank 14, the cooled refrigerant is sent to the condenser of the refrigerator unit 11 through the circulating water pump 12 to absorb the cooling medium for heat release, and the heated refrigerant returns to the cooling tower through the first pipeline a (refrigerant return pipe) for cooling. The condensed water after the air passes through the dehumidifier 2 is collected into a condensed water tank 8 through a first automatic drainage device 41, is pressurized through a condensed water pump 7, and is collected into a refrigerant return pipe through a third pipeline C to be used as the water supplement of the cooling tower.

Example 2

Aiming at the cold energy loss caused by the fact that the condensed water in the embodiment 1 cannot be directly reused, in the embodiment 2, the condensed water in the condensed water tank 8 is sent into the spray room 21 through the condensed water pump 7, the spray room 21 atomizes the condensed water into small droplets through the spray head, the droplet SMD is generally controlled below 100 micrometers, the atomized water mist firstly contacts with the air at the outlet of the filter 1, the air can be cooled by 3-5 ℃ in advance, and the energy of the system is saved by 3% -5%. And part of spray water directly falls to a lower water collecting tank, is collected by a second automatic drainage device 42 and then is sent into a drainage tank 6, and is converged into a refrigerant return pipe together with the outlet water of the gas-water heat exchanger through a drainage pump 5 to be used as cooling tower water supplement.

Example 3

The temperature of the refrigerant passing through the refrigerating unit 11 rises by 5 ℃, the refrigerant enters the gas-water heat exchanger 24 through the second pipeline B, the cooled saturated humid air can be heated by 3-10 ℃, and the temperature of the refrigerant is reduced by 1-2 ℃. The saturated wet air is heated by the air-water heat exchanger 24, so that the mechanical water can be removed, the temperature and the dryness of the air entering the air blower are improved by heating, and the safety of the blades of the air blower is guaranteed.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.