CN103776294A

CN103776294A - Water recovery system for cooling equipment

Info

Publication number: CN103776294A
Application number: CN201410059331.2A
Authority: CN
Inventors: 张溪
Original assignee: Individual
Current assignee: Individual
Priority date: 2014-02-21
Filing date: 2014-02-21
Publication date: 2014-05-07

Abstract

The invention discloses a water recovery system for cooling equipment, relating to equipment for recovering water vapor in a cooling tower, in particular to equipment for recovering water vapor in cooling towers for use in thermal power plants, large-sized air conditioners and the departments of chemical industry, metallurgy and the like, mainly aiming to solve the problems that great waste is caused since the recovery efficiency of water vapor being over 200 microns in diameter is only 50 percent while water vapor being below 20 microns in diameter is directly discharged into the atmospheric air under the situation that a dehydrator is generally arranged in a cooling tower in the production processes of known thermal power plants and the like and the problem that the manufacturing and running costs are high since air cooling units are adopted in certain power plants. The water recovery system consists of N water-collecting electrodes and corona electrodes which are connected together, wherein the water-collecting electrodes and the corona electrodes are fixed above a dehydrator in a cooling tower through a bracket, and are electrically connected with the anode and cathode of a high-pressure generator respectively. The water recovery system is simple in structure and low in running and manufacturing costs, and the vapor recovery efficiency can be over 95 percent.

Description

Cooling device recycle-water system

Technical field

The present invention relates to a kind of equipment that reclaims cooling tower water steam, relate to specifically thermal power plant, large-size air conditioning, chemical industry, the energy-saving and cost-reducing equipment of the cooling tower water vapor recovery water of the departments such as metallurgy.

Background technology

At present, in the production process of thermal power plant, conventionally use cooling tower by circulating water, water falls in cooling tower, reach cooling effect by evaporation and heat transmission, power plant recycles reclaiming the lower water of temperature obtaining, the entrained moisture content of damp-heat air of discharging in cooling tower, be greater than 200 microns of above steam for diameter, conventionally adopt and arrange dehydrater to be reclaimed, its efficiency also only has 50%, be less than 200 microns of following steam for diameter, directly enter atmosphere, be called evaporation loss, and for being mixed in airborne steam at present also without method recovery preferably, cause very large waste.Take 2x300MW thermal power plant as example, the average evaporation loss of design is 2x486t/h, its circulation total amount is 2x33800t, evaporation loss accounts for 1.53% of total amount, annual loss fluid loss is about 6,000,000 tons, be China's one small and medium-sized cities annual domestic water consumption water consumption, it is very huge not measuring loss, sees " industrial circulating water Cooling Design standard GB (GBJ102-87) ".

Most of thermal power plant of China does not more effectively reclaim power one method for evaporation loss now, there is part power plant to adopt the methods such as Air-cooled Unit, only air cooling tower is exactly 6 times of conventional tower cost, four seasons operation power consumption is huge, increase the consumption of coal, so purchasing with operating cost of method for air-cooling is very expensive.

Summary of the invention

The object of the invention is for above-mentioned deficiency, and a kind of equipment proposing is simple, operation and cheap for manufacturing cost, reclaims evaporation water and can reach more than 95% cooling tower recycle-water system.

Technical solution of the present invention is: cooling tower recycle-water system is made up of interconnective electrode and the corona electrode of catchmenting of N, catchment electrode and corona electrode is fixed on the top of dehydrater in cooling tower by support, catchment electrode and corona electrode are electrically connected with the positive and negative electrode of high pressure generator respectively.

The individual electrode that catchments of N described in technical solution of the present invention is minimum is 1.

Corona electrode described in technical solution of the present invention is cylindric, prickle shape or cylindrical brush shape, and along catchmenting, pole axis catchments in electrode to vertical insertion.

Corona electrode described in technical solution of the present invention is latticed, is fixed on the below of the electrode that catchments with the radial parallel of the electrode that catchments.

The present invention is according to the heavy poly-characteristic of the static of steam, make steam pass through electrostatic field, between plain conductor and metal pipe-wall (or pole plate), apply high pressure (or high voltage pulse) direct current, to maintain the electric field that is enough to make γ-ray emission ionization, make to form between both positive and negative polarity corona zone; Connect electric field theory, cation is adsorbed in electronegative corona discharge electrode, and anion is adsorbed in the utmost point that catchments of positively charged; The whole space that all negative ions that are ionized are all full of corona discharge electrode and catchment between the utmost point; In the time that the gas of containing water vapor droplet passes through this electric field, the steam fog that has adsorbed anion and electronics drops under the effect of electric field Coulomb force, and moving to catchments, and to discharge extremely afterwards institute electrically charged, and be adsorbed in to catchment and extremely go up, formation is dropped in tower compared with flood, thereby reaches the object of recycle-water steam; The present invention is simple in structure, operation and low cost of manufacture, as the power plant's damage by water amount estimation with 300MW unit, the calculating of evaporation loss is: in the time that circulating water intake temperature is 20 ℃, the wet-bulb temperature of environment (atmosphere) is 20-5=15 ℃, read up the literature and can obtain, the dry-bulb temperature of atmosphere is 21 ℃, k=0.142%.

Substitution formula can obtain: E=kx △ tXQm=0.142% X 9.51 X 36000=486t/h

Environment temperature (℃)	6	11	16	21	26	31	36
								Evaporation water consumption (t/h)	395	123	153	486	518	553	589

Upper table estimates 300MW unit sectional area 3500M2 four seasons in cooling tower year, and on average to evaporate damage by water amount be 486(m3/h), as use the present invention, can reduce damage by water more than 90%, save 486 X 90%=437(m3/h), within 1 year, can save 3,150,000 tons, water (to move 300 days), an only unit, with existing water price meter, for enterprise has greatly reduced cost.

Accompanying drawing explanation

Fig. 1 is electrical schematic diagram of the present invention;

Fig. 2 is that in Fig. 1, recycle-water device is cellular A-A zoomed-in view;

Fig. 3 is the top view of single catchment electrode and corona electrode in Fig. 2;

Fig. 4 is the B-B zoomed-in view of Fig. 3;

Fig. 5 is the A-A zoomed-in view that in Fig. 1, recycle-water device is circular tube shaped;

Fig. 6 is that in Fig. 1, recycle-water device is concentrically ringed A-A zoomed-in view;

Fig. 7 is the structural representation that electrode and corona electrode be arranged in parallel that catchments.

The specific embodiment

As Fig. 1, 2, 3, shown in 4, the alternating current that the input voltage of the switch board 1 of power supply input is 220-380V, power supply is electrically connected with high pressure generator 3 by security control cabinet 2, due to the operating voltage of the present invention HVDC that is 1-120KV, by security control cabinet 2, the safety of working environment is monitored, in the time breaking down, security control cabinet 2 power-off immediately, assurance equipment and personnel's safety, high pressure generator 3 is exported high voltage direct current and is connected with recycle-water device 4, recycle-water device 4 is made up of catchment electrode 6 and corona electrode 7, the positive pole of high voltage direct current connects the electrode 6 that catchments, negative pole connects corona electrode 7, recycle-water device 4 is fixed on the top of cooling tower 5, it is the top of cooling tower dehydrater 9, the cross section of retracting device 4, be steam channel cross-section by N interconnective regular hexagon form one cellular, as shown in Figure 2, orthohexagonal limit makes of metal material, as the electrode 6 that catchments of recycle-water device 4, the electrode 6 that catchments is fixed on the top of the interior dehydrater 9 of cooling tower 5 by being fixed on support on cooling tower 5, corona electrode 7 of the interior insertion of each electrode 6 that catchments, corona electrode 7 adopts metal material to make, it is shaped as cylindric, prickle shape or cylindrical brush shape, corona electrode 7 axially vertically inserts in the space of the electrode 6 that catchments along the utmost point 6 that catchments, and and catchment and between electrode 6, carry out insulation processing, corona electrode 7 is fixed by the support being fixed on cooling tower 5, the number of electrode 6 of catchmenting is minimum is 1, in the time there is ionization by the corona electrode 7 of recycle-water device 4 in steam, the steam droplet 8 of static electrification gathers to the electrode 6 that catchments, being condensed into flood is dropped in cooling tower 5, it is reasonable that cellular recycle-water device 4 has compact conformation, there is no electric field hole, and useful space utilization rate is high, lightweight, consumptive material is few, trapping characteristic good feature.

As shown in Figure 5, the channel cross-section of recycle-water device 4 also can be made up of the electrode 6 that catchments of N pipe, the diameter of pipe is identical, by the support in cooling tower 5, the electrode 6 that catchments of N circular tube shaped is closely aligned equably and is fixed on cooling tower 5 tops, the top of dehydrater 9, corona electrode 7 is axially vertical by the center of circular tube shaped colelctor electrode 6 along the utmost point 6 that catchments, be fixed in cooling tower 5 by the support in cooling tower 5, the structure of circular tube shaped recycle-water device 4 is more complicated, has a small amount of electric field hole.

As shown in Figure 6, the channel cross-section of recycle-water device 4 also can adopt the electrode 6 that catchments of concentric circles to form, the recycle-water device 4 of concentric circles is by take same vertical axis, as the center of circle, the electrode 6 that catchments to N different-diameter of external diffusion forms, the electrode 6 that catchments is processed into cylinder by steel plate, corona electrode 7 is evenly distributed on the middle part, gap of concentrically ringed two Neighbor Set water electrodes 6, vertical insertion catchmented in electrode 6 vertically, catchmenting is the utmost point 6 and corona electrode r are fixed on cooling tower 5 top by support, the top of dehydrater 9, concentric circles steam catcher 4 is simple in structure, easy for installation, but there is a small amount of electric field hole.

As shown in Figure 7, the electrode 6 that catchments adopts metal material to make cellular, circular tube shaped, concentric circles or grid-like, be fixed on the top of cooling tower 5 by support, the top of cooling tower dehydrater 9, corona electrode 7 is wire netting trellis, along radially parallel with the electrode 6 that the catchments below that is fixed on the electrode 6 that catchments of the electrode 6 that catchments, corona electrode 7 is fixed on the top of dehydrater 9 in cooling tower by support.

Claims

1. a cooling device recycle-water system, it is characterized in that: recycle-water device (4) is made up of N the interconnective electrode that catchments (6) and corona electrode (7), catchment electrode (6) and corona electrode (7) is fixed on the top of the interior water collector of cooling tower (5) (9) by support, the electrode that catchments (6) and corona electrode (1) are electrically connected with the positive and negative electrode of high pressure generator (3) respectively.

2. cooling device recycle-water system according to claim 1, that the cross section that it is characterized in that the described interconnective electrode that catchments (6) passage is is cellular, circular tube shaped, concentric circles or grid-like.

3. cooling device recycle-water system according to claim 1, it is characterized in that described N catchment electrode (6) minimum be 1.

4. cooling device recycle-water system according to claim 1, is characterized in that described corona electrode (7) is for cylindric, prickle shape or cylindrical brush shape, along catchment the utmost point (6) axially vertical insertion catchment in electrode (6).

5. cooling device recycle-water system according to claim 1, is characterized in that described corona electrode (7) is for network-like, is fixed on the below of the electrode that catchments (6) with the radial parallel of the electrode that catchments (6).