CN204042849U - Deoxygenation exhaust steam condenser system is reclaimed in the mixing of condensed water demineralized water - Google Patents
Deoxygenation exhaust steam condenser system is reclaimed in the mixing of condensed water demineralized water Download PDFInfo
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- CN204042849U CN204042849U CN201420313485.5U CN201420313485U CN204042849U CN 204042849 U CN204042849 U CN 204042849U CN 201420313485 U CN201420313485 U CN 201420313485U CN 204042849 U CN204042849 U CN 204042849U
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Abstract
The utility model relates to the mixing of a kind of condensed water demineralized water and reclaims deoxygenation exhaust steam condenser system, and pressure-bearing surge tank is circumferentially connected with first and third water inlet pipe being positioned at upper strata and second, four water inlet pipes being positioned at lower floor; Synthetic ammonia cooling and desalting water and conversion cooling and desalting water access first and third water inlet pipe respectively, and calcining furnace condensed water and fluid bed condensed water access second, four water inlet pipes respectively; Pressure-bearing surge tank top is connected with surge tank gland steam exhauster; Surge tank outlet pipe is connected with the first water pump, the deoxygenation head water inlet pipe of the first water delivery side of pump access higher-pressure deaerator, deoxygenation case drainpipe is by the 3rd water pump access boiler replenishing water pipe, deoxygenation exhaust steam becomes deoxygenation exhaust steam condensed water and enters condensation water collection tank after entering the second heat exchanger condensation, send into pressure-bearing surge tank by the second water pump; The base plate of pressure-bearing surge tank is provided with sewage draining exit, and sewage draining exit is connected with blow-off pipe, blow-off pipe is provided with the second control valve.This device condensation water residual heat utilization rate is high and reliable.
Description
Technical field
The utility model relates to the mixing of a kind of condensed water demineralized water and reclaims deoxygenation exhaust steam condenser system, can be used for the recovery of the high-temperature condensation water of alkali factory production line generation and the demineralized water through heating.
Background technology
For preventing heat power equipment and corrosive pipeline thereof, and prevent incoagulable gas to be mixed into steam and reduce steam quality, must remove and be dissolved in dissolved oxygen in boiler replenishing water and other incoagulable gas, realize often through oxygen-eliminating device.According to Henry's law and Dalton's law, for the various gases be dissolved in the water, under pressure, the temperature of water is higher, and solubility is lower; Or under pressure, the partial pressure of gas is lower, and the solubility of this gas is lower.Thermal de-aeration is exactly when boiler replenishing water is heated to the saturation temperature under corresponding pressure, vapor partial pressure power will close to total pressure on the water surface, the partial pressure of various gas soluble in water is close to zero, therefore, water does not just have the ability of dissolved gas, gas soluble in water is just precipitated, thus the oxygen removed in water and other gases.Thermal deaerator comprises deoxygenation head and deoxygenation case, deoxygenation head is positioned at deoxygenation upper box part, the side wall upper part of deoxygenation head is connected with deoxygenation head water inlet pipe, the lower sidewall of deoxygenation head is connected with deoxygenation steam pipe, the top of deoxygenation head is connected with deoxygenation head gland steam exhauster, and the bottom of deoxygenation case is connected with deoxygenation case drainpipe.
In alkali factory production line, because a large amount of steam that uses can produce a lot of condensed water, as calcining furnace condensed water, fluid bed condensed water and dry ammonium condensed water etc., the temperature of condensed water after flash distillation utilizes still has 135 DEG C ~ 155 DEG C.In addition, synthetic ammonia and shift conversion step can use a large amount of demineralized waters as indirect cooling water, the temperature about 60 DEG C ~ 80 DEG C of the synthetic ammonia cooling and desalting water after heating, through the temperature about 60 DEG C ~ 95 DEG C of the conversion cooling and desalting water of heating.Because of the condensed water that produces and the temperature of cooling and desalting water higher, water quality meets again the requirement of boiler replenishing water, Ge Jian factory often by above steam condensate (SC) and cooling and desalting Water Sproading in the deoxygenation case of atmospheric type deaerator, then deliver to boiler as boiler replenishing water by deoxygenation case by water pump.
There is following weak point in above way of recycling: 1. oxygen-eliminating device is air suspended type, operating temperature about 104 DEG C, and condensed water and the mixed actual temperature of demineralized water are considerably beyond 104 DEG C, therefore overage by deoxygenation head and a large amount of kiting of flash tank be communicated with oxygen-eliminating device, can only waste a large amount of residual heat resources and water resource.2. greatly, by direct contact heat transfer, heat is difficult to reaching balance instantaneously, therefore easily produces thermal explosion in deoxygenation case, affects equipment safety operation for condensed water and the demineralized water temperature difference.3. there is contradiction in the continuity that the intermittence of boiler replenishing water and condensed water produce: when boiler not moisturizing or rate of water make-up little time, the valve opening that calcining furnace condensed water enters oxygen-eliminating device is less, and system builds the pressure, and calcining fire grate condensed water is not smooth; When a large amount of moisturizing of boiler, the valve opening that calcining furnace condensed water enters oxygen-eliminating device is large, and system back pressure reduces, and calcining furnace steam string, to oxygen-eliminating device, aggravates the discharge of waste heat.4. deoxygenation case limited volume, can not form effectively buffering between boiler unit and production unit.
Utility model content
The purpose of this utility model is, overcomes problems of the prior art, provides a kind of condensed water demineralized water to mix and reclaims deoxygenation exhaust steam condenser system, and condensation water residual heat utilization rate is high and can guarantee that the fluctuation of boiler replenishing water does not affect the normal operation with vapour unit.
For solving above technical problem, deoxygenation exhaust steam condenser system is reclaimed in a kind of condensed water demineralized water mixing of the present utility model, comprise calcining furnace condensed water, fluid bed condensed water, synthetic ammonia cooling and desalting water and conversion cooling and desalting water, also comprise closed pressure-bearing surge tank, described pressure-bearing surge tank be circumferentially vertically connected with the first water inlet pipe, second water inlet pipe, 3rd water inlet pipe and the 4th water inlet pipe, described first water inlet pipe is relative with the mouth of pipe of the 3rd water inlet pipe and short transverse staggers mutually, described second water inlet pipe is relative with the mouth of pipe of the 4th water inlet pipe and short transverse staggers mutually, the height of described first water inlet pipe and the 3rd water inlet pipe is higher than described second water inlet pipe and the 4th water inlet pipe, described synthetic ammonia cooling and desalting water and conversion cooling and desalting water access described first water inlet pipe and the 3rd water inlet pipe respectively, and described calcining furnace condensed water and fluid bed condensed water access described second water inlet pipe and the 4th water inlet pipe respectively, be connected with surge tank gland steam exhauster in the middle part of the roof of described pressure-bearing surge tank, described surge tank gland steam exhauster is provided with non-return valve and the first control valve from lower to upper successively, the surge tank outlet pipe of opening upwards is provided with in described pressure-bearing surge tank, the lower end of described surge tank outlet pipe is connected with the entrance of the first water pump through the base plate of pressure-bearing surge tank, described first water delivery side of pump is through the deoxygenation head water inlet pipe of the 5th control valve access higher-pressure deaerator, the entrance of deoxygenation case drainpipe access the 3rd water pump of described higher-pressure deaerator, described 3rd water delivery side of pump access boiler replenishing water pipe, external steam is by the 4th control valve access deoxygenation steam pipe, the deoxygenation crown portion of described higher-pressure deaerator is connected with the deoxygenation head gland steam exhauster of discharge deoxygenation exhaust steam and incoagulable gas, the outlet of described deoxygenation head gland steam exhauster is connected with the second heat exchanger deoxygenation exhaust steam import of the second heat exchanger, second heat exchanger deoxygenation exhaust steam condensation-water drain of described second heat exchanger is connected with the deoxygenation exhaust steam condensed water water inlet pipe of condensation water collection tank, the condensation water collection tank outlet pipe of described condensation water collection tank is connected with the entrance of the second water pump, and the outlet of described second water pump accesses in described pressure-bearing surge tank, second heat exchanger circulating cooling water inlet and the second heat exchanger circulating cooling water out of described second heat exchanger connect and compose circulation with the circulating cooling water pipe of outside respectively, the inlet duct of the second heat exchanger circulating cooling water inlet is provided with the 6th control valve, the outlet of the second heat exchanger deoxygenation exhaust steam condensation-water drain is provided with the second incoagulable gas delivery pipe stretched out straight up, the base plate of described pressure-bearing surge tank is provided with sewage draining exit, and described sewage draining exit is connected with blow-off pipe, described blow-off pipe is provided with the second control valve.
Relative to prior art, the utility model achieves following beneficial effect: (1) calcining furnace condensed water, fluid bed condensed water, synthetic ammonia cooling and desalting water and conversion cooling and desalting water enter in pressure-bearing surge tank respectively, discharge from surge tank outlet pipe after mixing, send into higher-pressure deaerator by the first water pump and carry out deep deoxygenization, to meet the requirement of high-pressure boiler to oxygen content; Deoxygenation head steam mixes the incoagulable gas such as the oxygen overflowed in the deoxygenation exhaust steam and water produced and discharges from the deoxygenation head gland steam exhauster in deoxygenation crown portion.(2) pressure-bearing surge tank can bear certain pressure and water level can adjust in a big way, the contradiction between continuity that the intermittence of boiler replenishing water and condensed water produce can be made up, isolating with being formed between vapour unit and boiler replenishing water system and cushioning, guarantee that the fluctuation of boiler replenishing water does not affect the normal operation with vapour unit, avoid when boiler replenishing water amount hour, condensed water pipe network back pressure is high, and calcining furnace and fluidized system occur that the row's of building the pressure condensed water is not smooth; It also avoid when a large amount of moisturizing of boiler, condensed water pipe network back pressure is low, and the steam string of calcining furnace and fluidized system, to oxygen-eliminating device, aggravates the discharge of waste heat.(3) the temperature of synthetic ammonia cooling and desalting water and conversion cooling and desalting water is slightly low and containing incoagulable gas such as oxygen, calcining furnace condensed water and the high and incoagulable gas such as oxygen-free gas of fluid bed condensate temperature, synthetic ammonia cooling and desalting water, conversion cooling and desalting water and calcining furnace condensed water, after the mixing of fluid bed condensed water, temperature rises, and the pressure-bearing surge tank operating pressure saturation pressure that to be pressure-bearing surge tank mixing water temperature corresponding, the partial pressure of oxygen and other incoagulable gas is close to zero, solubility is close to zero, discharge from surge tank gland steam exhauster with surge tank exhaust steam after overflowing the pressure-bearing surge tank water surface, realize one-level deoxygenation, water through one-level deoxygenation is discharged the deoxygenation head water inlet pipe sending into higher-pressure deaerator through the first water pump and the 5th control valve by surge tank outlet pipe, external steam enters deoxygenation head from deoxygenation steam pipe and the 4th control valve and carries out secondary deoxygenation to water inlet, the incoagulable gas such as the deoxygenation exhaust steam that the mixing of deoxygenation head steam produces and oxygen are discharged from deoxygenation head gland steam exhauster, and the water through secondary deoxygenation sends into boiler as boiler replenishing water by the 3rd water pump.(4) the non-return valve on surge tank gland steam exhauster can guarantee that air can not pour in down a chimney in pressure-bearing surge tank, prevents from introducing extraneous oxygen.(5) the first control valve is by controlling the discharge capacity of surge tank exhaust steam, makes to maintain certain pressure in pressure-bearing surge tank, fully to receive the heat of condensed water and demineralized water, reduces the loss of surge tank exhaust steam discharge and heat, not only energy-conservation but also environmental protection.(6) improve boiler replenishing water temperature, reduce unit steam coal consumption.(7) the first water inlet pipe that the synthetic ammonia cooling and desalting water that temperature is relatively low, density is higher, conversion cooling and desalting water are higher from position and the 3rd water inlet pipe enter, the second water inlet pipe that the calcining furnace condensed water that temperature is relatively high, density is lower, fluid bed condensed water are lower from position and the 4th water inlet pipe enter pressure-bearing surge tank, free convection can be formed in pressure-bearing surge tank, promote abundant heat exchange.(8) along with the increase of working time, can gather certain impurity bottom pressure-bearing surge tank, water quality can decline, and now can open the second control valve, discharges the water of water degradation, guarantee boiler replenishing water water quality from blow-off pipe.(9) the deoxygenation exhaust steam of higher-pressure deaerator discharge enters the second heat exchanger and is recycled and is condensed into deoxygenation exhaust steam condensed water after cooling water cools indirectly and enters in condensation water collection tank, fill into pressure-bearing surge tank by the second water pump, reclaim the most of water entrained by deoxygenation exhaust steam and partial heat.(10) after deoxygenation exhaust steam condensation, the incoagulable gas such as the oxygen of discharging with deoxygenation exhaust steam are still gaseous state, discharge from the second incoagulable gas delivery pipe; Incoagulable gas density is little, and the second incoagulable gas delivery pipe stretches out the discharge being beneficial to incoagulable gas straight up.
As preferred version of the present utility model, the annular water distributor that the mouth of pipe that described first water inlet pipe, the second water inlet pipe, the 3rd water inlet pipe and the 4th water inlet pipe are positioned at pressure-bearing surge tank is connected to along the horizontal plane and the inner peripheral wall of pressure-bearing surge tank extends, the middle and lower part of each described annular water distributor is evenly distributed with the spray-hole of the axis jet to pressure-bearing surge tank respectively, the axis of each described spray-hole become 30 ° ~ 45 ° angles with horizontal plane and respectively with the axes intersect of pressure-bearing surge tank.The water inlet of every road is all by ring pipe water outlet in the tank that arranges spray-hole, and current blowing perforation oliquely downward sprays, and contacts with water body in tank with parabolical, extends the time of contact with water body in tank, realizes abundant heat exchange, avoid thermal explosion.
As preferred version of the present utility model, the inner chamber middle and lower part of described pressure-bearing surge tank is provided with Forced Mixing impeller, described Forced Mixing impeller is fixedly connected on Forced Mixing impeller axle, described Forced Mixing impeller axle vertically downward through pressure-bearing surge tank base plate and and realize sealing pressure-bearing surge tank base plate, the lower end of described Forced Mixing impeller axle is connected with Forced Mixing impeller drive motor.When the temperature difference of synthetic ammonia cooling and desalting water, conversion cooling and desalting water and calcining furnace condensed water, fluid bed condensed water is larger, only by natural heat-exchange, in tank, temperature is still difficult to be evenly distributed, easily in pressure-bearing surge tank, formation temperature is poor, now open Forced Mixing impeller and Forced Mixing is carried out to tank inner storing water, promote the uniformity of Temperature Distribution in tank.
As preferred version of the present utility model, the intracavity bottom of described pressure-bearing surge tank is provided with disturbance impeller, described disturbance impeller is fixedly connected on disturbance impeller axle, described disturbance impeller axle vertically downward through pressure-bearing surge tank base plate and and realize sealing pressure-bearing surge tank base plate, the lower end of described disturbance impeller axle is connected with disturbance impeller drive motor; Described disturbance impeller axle departs from the axis of described pressure-bearing surge tank, and the plate inner wall of described pressure-bearing surge tank is provided with eddy current baffle plate, and described eddy current baffle plate is perpendicular to base plate and extend along base plate diametric(al).When needs blowdown, impurity often accumulates in the bottom of pressure-bearing surge tank, is difficult to discharge with current, now opens disturbance impeller and impurity can be flashed by bottom water flow rotation; If current are stable circulation state, then good not to the disturbance effect of impurity, disturbance impeller axle of the present utility model departs from the axis of pressure-bearing surge tank, can avoid making current present stable circulation state; The eddy current baffle plate that plate inner wall is installed thoroughly can destroy circulation more, makes current occur turbulence state, is more conducive to disturbance and the discharge of impurity.
As preferred version of the present utility model, described sewage draining exit is provided with multiple, be divided into inner ring sewage draining exit and outer ring sewage draining exit two groups, each inner ring sewage draining exit to be evenly distributed on close to pressure-bearing surge tank axis circumferentially, each outer ring sewage draining exit to be evenly distributed on away from pressure-bearing surge tank axis circumferentially, and each inner ring sewage draining exit and each outer ring sewage draining exit are distributed on the different-diameter of base plate.Multiple orientation of base plate distribute more sewage draining exit, can improve contaminant removal effectiveness, reduce displacement.
As preferred version of the present utility model, described inner ring sewage draining exit and outer ring sewage draining exit are respectively provided with four, and the angle between each inner ring sewage draining exit place diameter and adjacent sewage draining exit place, outer ring diameter is 45 °.Inner ring sewage draining exit and outer ring sewage draining exit staggered in a circumferential direction, centered by pressure-bearing surge tank axis, be equipped with sewage draining exit to extraradial eight directions, blowdown can be made more evenly rationally, better effects if, within the shortest time, get rid of as far as possible many dirts, reduce displacement.
As preferred version of the present utility model, the intracavity bottom of described pressure-bearing surge tank is provided with sampling pipe, it is outer and be connected with sampling cooler that described sampling pipe stretches out pressure-bearing surge tank, the export pipeline of described sampling cooler is provided with online electric conductivity detector and online Ph value detector.In-tank mixing electrical conductivity of water and Ph value can be detected in real time.
Accompanying drawing explanation
Be described in further detail the utility model below in conjunction with the drawings and specific embodiments, accompanying drawing only provides reference and explanation use, is not used to limit the utility model.
Fig. 1 is the schematic diagram that deoxygenation exhaust steam condenser system is reclaimed in the mixing of the utility model condensed water demineralized water.
Fig. 2 is the partial sectional view at pressure-bearing surge tank the 3rd water inlet pipe position in the utility model.
Fig. 3 is the base plate top view of pressure-bearing surge tank in the utility model.
In figure: PLC.PLC controller;
E1. pressure-bearing surge tank; E1a. sewage draining exit; E1b. eddy current baffle plate; E1c. Forced Mixing impeller; E1d. disturbance impeller; E1e. sampling pipe;
G1. the first water inlet pipe; G2. the second water inlet pipe; G3. the 3rd water inlet pipe; G4. the 4th water inlet pipe; G5. surge tank gland steam exhauster; G6. surge tank outlet pipe; G7. blow-off pipe; Vd. non-return valve; V1. the first control valve; B1. the first water pump; T1. the first temperature sensor; T2. the second temperature sensor; T3. three-temperature sensor; T4. the 4th temperature sensor; T5. the 5th temperature sensor; T6. the 6th temperature sensor; T7. the 7th temperature sensor; T8. the 8th temperature sensor; P. pressure sensor; V2. the second control valve; M1. first-class gauge; M2. second gauge; M3. the 3rd flowmeter; M4. the 4th flowmeter;
Q. to sample cooler; Q1. online electric conductivity detector; Q2. online Ph value detector;
E2. condensation water collection tank; E2a. condensation water collection tank outlet pipe; E2c. deoxygenation exhaust steam condensed water water inlet pipe; B2. the second water pump;
E3. higher-pressure deaerator; E3a. deoxygenation steam pipe; E3b. deoxygenation head water inlet pipe; E3c. deoxygenation head gland steam exhauster; E3d. deoxygenation case drainpipe; B3. the 3rd water pump; V4. the 4th control valve; V5. the 5th control valve;
H2. the second heat exchanger; H2a. the second heat exchanger circulating cooling water inlet; H2b. the second heat exchanger circulating cooling water out; H2c. the second heat exchanger deoxygenation exhaust steam import; H2d. the second heat exchanger deoxygenation exhaust steam condensation-water drain; H2e. the second incoagulable gas delivery pipe; T10. the tenth temperature sensor; V6. the 6th control valve.
Detailed description of the invention
As shown in Figure 1, deoxygenation exhaust steam condenser system is reclaimed in the mixing of the utility model condensed water demineralized water, comprise the conversion cooling and desalting water of the calcining furnace condensed water of 135 DEG C ~ 155 DEG C, the fluid bed condensed water of 135 DEG C ~ 155 DEG C, the synthetic ammonia cooling and desalting water of 60 DEG C ~ 80 DEG C and 60 DEG C ~ 95 DEG C, also comprise closed pressure-bearing surge tank E1.Pressure-bearing surge tank E1 is circumferentially vertically connected with the first water inlet pipe G1, the second water inlet pipe G2, the 3rd water inlet pipe G3 and the 4th water inlet pipe G4, first water inlet pipe G1 is relative with the mouth of pipe of the 3rd water inlet pipe G3 and short transverse staggers mutually, second water inlet pipe G2 is relative with the mouth of pipe of the 4th water inlet pipe G4 and short transverse staggers mutually, and the height of the first water inlet pipe G1 and the 3rd water inlet pipe G3 is higher than the second water inlet pipe G2 and the 4th water inlet pipe G4.Synthetic ammonia cooling and desalting water and conversion cooling and desalting water access the first water inlet pipe G1 and the 3rd water inlet pipe G3 respectively, and calcining furnace condensed water and fluid bed condensed water access the second water inlet pipe G2 and the 4th water inlet pipe G4 respectively; Be connected with surge tank gland steam exhauster G5 in the middle part of the roof of pressure-bearing surge tank E1, surge tank gland steam exhauster G5 be provided with from lower to upper successively non-return valve Vd and the first control valve V1.
The surge tank outlet pipe G6 of opening upwards is provided with in pressure-bearing surge tank E1, the lower end of surge tank outlet pipe G6 is connected with the entrance of the first water pump B1 through the base plate of pressure-bearing surge tank E1, the outlet of the first water pump B1 accesses the deoxygenation head water inlet pipe E3b of higher-pressure deaerator E3 through the 5th control valve V5, the deoxygenation case drainpipe E3d of higher-pressure deaerator E3 accesses the entrance of the 3rd water pump B3, the outlet access boiler replenishing water pipe of the 3rd water pump B3, external steam accesses deoxygenation steam pipe E3a by the 4th control valve V4, the deoxygenation crown portion of higher-pressure deaerator E3 is connected with the deoxygenation head gland steam exhauster E3c of discharge deoxygenation exhaust steam and incoagulable gas.
Deoxygenation head gland steam exhauster E3c is connected with the second heat exchanger deoxygenation exhaust steam import H2c of the second heat exchanger H2, the second heat exchanger deoxygenation exhaust steam condensation-water drain H2d of the second heat exchanger H2 is connected with the deoxygenation exhaust steam condensed water water inlet pipe E2c of condensation water collection tank E2, the condensation water collection tank outlet pipe E2a of condensation water collection tank E2 is connected with the entrance of the second water pump B2, in the outlet access pressure-bearing surge tank E1 of the second water pump B2, second heat exchanger circulating cooling water inlet H2a and the second heat exchanger circulating cooling water out H2b of the second heat exchanger H2 connect and compose circulation with the circulating cooling water pipe of outside respectively, namely the second heat exchanger circulating cooling water inlet H2a is connected with the circulating cooling water pipe of low temperature, second heat exchanger circulating cooling water out H2b is connected with the circulating cooling water pipe of high temperature, the inlet duct of the second heat exchanger circulating cooling water inlet H2a is provided with the 6th control valve V6, the outlet of the second heat exchanger deoxygenation exhaust steam condensation-water drain H2d is provided with the second incoagulable gas delivery pipe H2e stretched out straight up, second incoagulable gas delivery pipe H2e is provided with stop valve.Second incoagulable gas delivery pipe H2e is preferably installed on the highest point of the second heat exchanger deoxygenation exhaust steam condensating water outlet tube, and the best is installed on the descending opposite direction of turning round of the second heat exchanger deoxygenation exhaust steam condensating water outlet tube.
The base plate of pressure-bearing surge tank E1 is provided with sewage draining exit E1a, and sewage draining exit E1a is connected with blow-off pipe G7, blow-off pipe G7 is provided with the second control valve V2.
The synthetic ammonia cooling and desalting water that during work, temperature is relatively low, density is higher and higher from position respectively the first water inlet pipe G1 of conversion cooling and desalting water and the 3rd water inlet pipe G3 enter; The second water inlet pipe G2 that the calcining furnace condensed water that temperature is relatively high, density is lower and fluid bed condensed water are lower from position and the 4th water inlet pipe G4 enters pressure-bearing surge tank E1, can form free convection, promote abundant heat exchange in pressure-bearing surge tank.Synthetic ammonia cooling and desalting water, conversion cooling and desalting water are discharged from surge tank outlet pipe G6 after mixing with calcining furnace condensed water, fluid bed condensed water, send into higher-pressure deaerator E3 carry out secondary deoxygenation by the first water pump B1.The temperature of synthetic ammonia cooling and desalting water and conversion cooling and desalting water is slightly low and containing incoagulable gas such as oxygen, calcining furnace condensed water and the high and incoagulable gas such as oxygen-free gas of fluid bed condensate temperature, synthetic ammonia cooling and desalting water, conversion cooling and desalting water and calcining furnace condensed water, after the mixing of fluid bed condensed water, temperature rises, and the pressure-bearing surge tank E1 operating pressure saturation pressure that to be pressure-bearing surge tank mixing water temperature corresponding, the partial pressure of oxygen and other incoagulable gas is close to zero, solubility is close to zero, discharge from surge tank gland steam exhauster G5 with surge tank exhaust steam after overflowing the pressure-bearing surge tank water surface, realize one-level deoxygenation, water through one-level deoxygenation is discharged the deoxygenation head water inlet pipe E3b sending into higher-pressure deaerator E3 through the first water pump B1 and the 5th control valve V5 by surge tank outlet pipe G6, external steam enters deoxygenation head from deoxygenation steam pipe E3a and the 4th control valve V4 and carries out secondary deoxygenation to water inlet, the incoagulable gas such as deoxygenation exhaust steam and oxygen are discharged from deoxygenation head gland steam exhauster E3c, water through secondary deoxygenation is discharged from deoxygenation case drainpipe E3d, sends into boiler as boiler replenishing water by the 3rd water pump B3.
The deoxygenation exhaust steam of discharging from deoxygenation head gland steam exhauster E3c enters the second heat exchanger H2 by the second heat exchanger deoxygenation exhaust steam import H2c, being recycled becomes deoxygenation exhaust steam condensed water after cooling water cools indirectly and discharges from the second heat exchanger deoxygenation exhaust steam condensation-water drain H2d, this deoxygenation exhaust steam condensed water enters condensation water collection tank E2 from deoxygenation exhaust steam condensed water water inlet pipe E2c, the second water pump B2 is entered again from condensation water collection tank outlet pipe E2a, second water pump B2 is pumped in pressure-bearing surge tank E1, the incoagulable gas such as the oxygen of discharging with deoxygenation exhaust steam are discharged from the second incoagulable gas delivery pipe H2e.
Non-return valve Vd on surge tank gland steam exhauster G5 can guarantee that air can not pour in down a chimney in pressure-bearing surge tank E1, prevents from introducing extraneous oxygen.First control valve V1 can control the discharge capacity of surge tank exhaust steam, make to maintain certain pressure in pressure-bearing surge tank E1, fully to receive the heat of condensed water and demineralized water, reduce the loss of surge tank exhaust steam discharge and heat, improve boiler replenishing water temperature, reduce unit steam coal consumption.Along with the increase of working time, can gather certain impurity bottom pressure-bearing surge tank E1, water quality can decline, and now can open the second control valve V2, from the water that blow-off pipe G7 discharges water degradation, guarantees boiler replenishing water water quality.
As improvement, first water inlet pipe G1 is provided with the first temperature sensor T1 and first-class gauge M1, second water inlet pipe G2 is provided with the second temperature sensor T2 and second gauge M2,3rd water inlet pipe G3 is provided with three-temperature sensor T3 and the 3rd flowmeter M3, the 4th water inlet pipe G4 is provided with the 4th temperature sensor T4 and the 4th flowmeter M4.Different azimuth and the differing heights of the liquid Space of pressure-bearing surge tank E1 are provided with multiple temperature sensor altogether, such as, be separately installed with the 5th temperature sensor T5, the 6th temperature sensor T6, the 7th temperature sensor T7 and the 8th temperature sensor T8 at height different parts.The gas-phase space of pressure-bearing surge tank E1 is also provided with pressure sensor P.
For improving the automatization level of system, the holding wire of the first temperature sensor T1, the second temperature sensor T2, three-temperature sensor T3, the 4th temperature sensor T4, the 5th temperature sensor T5, the 6th temperature sensor T6, the 7th temperature sensor T7, the 8th temperature sensor T8, first-class gauge M1, second gauge M2, the 3rd flowmeter M3, the 4th flowmeter M4 and pressure sensor P accesses the corresponding signal input of PLC respectively, and the corresponding signal output of PLC is connected with the control line of the first control valve V1.
The aperture controlling the first control valve V1 when PLC detects t>t0 or p>p0 strengthens, and the aperture controlling the first control valve V1 when PLC detects t<t0 or p<p0 reduces; Wherein t each temperature sensor that is pressure-bearing surge tank liquid Space survey the mean value of water temperature, such as the 5th temperature sensor T5, the 6th temperature sensor T6, the 7th temperature sensor T7 and the 8th temperature sensor T8 survey the mean value of water temperature; The force value that p surveys for pressure sensor P; T0 is the set temperature value of PLC, and t0=(t1 × m1+t2 × m2+t3 × m3+t4 × m4) ÷ (m1+m2+m3+m4) × safety coefficient, t1, t2, t3 and t4 are respectively the water temperature that the first temperature sensor T1, the second temperature sensor T2, three-temperature sensor T3 and the 4th temperature sensor T4 detect, and m1, m2, m3 and m4 are respectively first-class gauge M1, second gauge M2, the 3rd flowmeter M3 and the flow measured by the 4th flowmeter M4.P0 is the setup pressure value of PLC, and p0 is the saturation pressure force value of water vapour corresponding at t0 temperature, and safety coefficient gets 0.8 ~ 0.95.
The set temperature value of PLC gets the weighted average water temperature t0 of each water inlet pipe, there is one-to-one relationship in the saturation pressure p0 of water vapour and water temperature t0, when temperature in tank is greater than that in design temperature or tank, pressure is greater than setting pressure, the aperture that PLC controls the first control valve V1 strengthens, to strengthen the discharge of surge tank exhaust steam; When temperature in tank is lower than when in design temperature or tank, pressure is lower than setting pressure, the aperture that PLC controls the first control valve V1 reduces, and prevents that steam discharge is excessive even occurs that tank outer air is poured in down a chimney.Adopt PLC automatically to regulate the aperture of the first control valve V1 according to water temperature and pressure, improve the automatization level of system, avoid the excess emitters of surge tank exhaust steam, under guaranteeing that pressure-bearing surge tank is operated in the maximum pressure/temperature of permission, not only energy-conservation but also environmental protection.
As improvement, the outlet of the second heat exchanger deoxygenation exhaust steam condensation-water drain H2d is provided with the tenth temperature sensor T10 of detection deoxygenation exhaust steam condensate temperature, tenth temperature sensor T10 can detect the second heat exchanger H2 get rid of the temperature of oxygen exhaust steam condensed water, the corresponding signal input of the holding wire access PLC of the tenth temperature sensor, the corresponding signal output of PLC is connected with the control line of the 6th control valve V6, the temperature height of the deoxygenation exhaust steam condensed water that PLC detects according to the tenth temperature sensor T10 controls the aperture size of the 6th control valve V6, to control the cooling water flow entering the second heat exchanger H2.
The intracavity bottom of pressure-bearing surge tank E1 can be provided with sampling pipe E1e, it is outer and be connected with sampling cooler Q that sampling pipe E1e stretches out pressure-bearing surge tank E1, the export pipeline of sampling cooler Q is provided with online electric conductivity detector Q1 and online Ph value detector Q2, to detect in-tank mixing electrical conductivity of water and Ph value in real time.
For improving the automatization level of system, the holding wire of online electric conductivity detector Q1 and online Ph value detector Q2 accesses the corresponding signal input of PLC respectively, and the corresponding signal output of PLC is connected with the control line of the second control valve V2; When PLC detects that the Ph value that electrical conductivity that online electric conductivity detector Q1 provides is greater than setting value or online Ph value detector Q2 and provides controls the second control valve V2 when exceeding setting range and opens, when PLC detect electrical conductivity that online electric conductivity detector Q1 provides be less than setting value and the Ph value that provides of online Ph value detector Q2 in setting range time control the second control valve V2 and close, realize the Ph value that the electrical conductivity that provides according to online electric conductivity detector Q1 and online Ph value detector Q2 provide, the keying of automatic control the second control valve V2.
As shown in Figure 2, as improvement, the annular water distributor that the mouth of pipe that first water inlet pipe G1, the second water inlet pipe G2, the 3rd water inlet pipe G3 and the 4th water inlet pipe G4 are positioned at pressure-bearing surge tank is connected to along the horizontal plane and the inner peripheral wall of pressure-bearing surge tank extends, for the 3rd water inlet pipe G3 in Fig. 2, the middle and lower part of each annular water distributor is evenly distributed with the spray-hole of the axis jet to pressure-bearing surge tank respectively, the axis of each spray-hole become 30 ° ~ 45 ° angles with horizontal plane and respectively with the axes intersect of pressure-bearing surge tank.The water inlet of every road is all by ring pipe water outlet in the tank that arranges spray-hole, and current blowing perforation oliquely downward sprays, and contacts with water body in tank with parabolical, extends the time of contact with water body in tank, realizes abundant heat exchange, avoid thermal explosion.
As shown in Figure 1, when calcining furnace condensed water, fluid bed condensed water and synthetic ammonia cooling and desalting water, convert the temperature difference of cooling and desalting water larger time, only by natural heat-exchange, in tank, temperature is still difficult to be evenly distributed, and easily in pressure-bearing surge tank E1, formation temperature is poor.Forced Mixing impeller E1c can be installed in the inner chamber middle and lower part of pressure-bearing surge tank, Forced Mixing impeller E1c is fixedly connected on Forced Mixing impeller axle, Forced Mixing impeller axle vertically downward through pressure-bearing surge tank base plate and and realize sealing pressure-bearing surge tank base plate, the lower end of Forced Mixing impeller axle is connected with Forced Mixing impeller drive motor, and Forced Mixing impeller axle is preferably placed on the axis of pressure-bearing surge tank.Open Forced Mixing impeller E1c and Forced Mixing is carried out to tank inner storing water, promote the uniformity of Temperature Distribution in tank.
Because accumulation of impurities is in the bottom of pressure-bearing surge tank, be difficult to during blowdown discharge with current, at the intracavity bottom of pressure-bearing surge tank, disturbance impeller E1d can be installed, disturbance impeller E1d is fixedly connected on disturbance impeller axle, disturbance impeller axle vertically downward through pressure-bearing surge tank base plate and and realize sealing pressure-bearing surge tank base plate, the lower end of disturbance impeller axle is connected with disturbance impeller drive motor, opens disturbance impeller E1d and impurity can be flashed by bottom water flow rotation, be beneficial to discharge.
Disturbance impeller axle preferably departs from the axis of pressure-bearing surge tank, to avoid making current present stable circulation state.
As shown in Figure 3, as improvement, the plate inner wall of pressure-bearing surge tank can be provided with eddy current baffle plate E1b, eddy current baffle plate E1b is perpendicular to base plate and extend along base plate diametric(al), eddy current baffle plate E1b thoroughly can destroy circulation, makes current occur turbulence state, is more conducive to disturbance and the discharge of impurity.
Sewage draining exit E1a can be provided with multiple, such as be divided into inner ring sewage draining exit and outer ring sewage draining exit two groups, each inner ring sewage draining exit to be evenly distributed on close to pressure-bearing surge tank axis circumferentially, each outer ring sewage draining exit to be evenly distributed on away from pressure-bearing surge tank axis circumferentially, and each inner ring sewage draining exit and each outer ring sewage draining exit are distributed on the different-diameter of pressure-bearing surge tank base plate.
Inner ring sewage draining exit and outer ring sewage draining exit are preferably respectively provided with four, inner ring sewage draining exit and outer ring sewage draining exit staggered in a circumferential direction, phase place staggers successively 45 ° and arrange, four inner ring sewage draining exits assume diamond in shape layout, four outer ring sewage draining exits are arranged in squares, and the angle between each inner ring sewage draining exit place diameter and adjacent sewage draining exit place, outer ring diameter is 45 °.
The foregoing is only the better possible embodiments of the utility model, non-ly therefore limit to scope of patent protection of the present utility model.In addition to the implementation, the utility model can also have other embodiments, and whole device can share a PLC, also can be controlled by respective PLC by each unit.All employings are equal to the technical scheme of replacement or equivalent transformation formation, all drop in the protection domain of the utility model requirement.
Claims (7)
1. deoxygenation exhaust steam condenser system is reclaimed in a condensed water demineralized water mixing, comprise calcining furnace condensed water, fluid bed condensed water, synthetic ammonia cooling and desalting water and conversion cooling and desalting water, it is characterized in that: also comprise closed pressure-bearing surge tank, described pressure-bearing surge tank be circumferentially vertically connected with the first water inlet pipe, second water inlet pipe, 3rd water inlet pipe and the 4th water inlet pipe, described first water inlet pipe is relative with the mouth of pipe of the 3rd water inlet pipe and short transverse staggers mutually, described second water inlet pipe is relative with the mouth of pipe of the 4th water inlet pipe and short transverse staggers mutually, the height of described first water inlet pipe and the 3rd water inlet pipe is higher than described second water inlet pipe and the 4th water inlet pipe, described synthetic ammonia cooling and desalting water and conversion cooling and desalting water access described first water inlet pipe and the 3rd water inlet pipe respectively, and described calcining furnace condensed water and fluid bed condensed water access described second water inlet pipe and the 4th water inlet pipe respectively, be connected with surge tank gland steam exhauster in the middle part of the roof of described pressure-bearing surge tank, described surge tank gland steam exhauster is provided with non-return valve and the first control valve from lower to upper successively, the surge tank outlet pipe of opening upwards is provided with in described pressure-bearing surge tank, the lower end of described surge tank outlet pipe is connected with the entrance of the first water pump through the base plate of pressure-bearing surge tank, described first water delivery side of pump is through the deoxygenation head water inlet pipe of the 5th control valve access higher-pressure deaerator, the entrance of deoxygenation case drainpipe access the 3rd water pump of described higher-pressure deaerator, described 3rd water delivery side of pump access boiler replenishing water pipe, external steam is by the 4th control valve access deoxygenation steam pipe, the deoxygenation crown portion of described higher-pressure deaerator is connected with the deoxygenation head gland steam exhauster of discharge deoxygenation exhaust steam and incoagulable gas, the outlet of described deoxygenation head gland steam exhauster is connected with the second heat exchanger deoxygenation exhaust steam import of the second heat exchanger, second heat exchanger deoxygenation exhaust steam condensation-water drain of described second heat exchanger is connected with the deoxygenation exhaust steam condensed water water inlet pipe of condensation water collection tank, the condensation water collection tank outlet pipe of described condensation water collection tank is connected with the entrance of the second water pump, and the outlet of described second water pump accesses in described pressure-bearing surge tank, second heat exchanger circulating cooling water inlet and the second heat exchanger circulating cooling water out of described second heat exchanger connect and compose circulation with the circulating cooling water pipe of outside respectively, the inlet duct of the second heat exchanger circulating cooling water inlet is provided with the 6th control valve, the outlet of the second heat exchanger deoxygenation exhaust steam condensation-water drain is provided with the second incoagulable gas delivery pipe stretched out straight up, the base plate of described pressure-bearing surge tank is provided with sewage draining exit, and described sewage draining exit is connected with blow-off pipe, described blow-off pipe is provided with the second control valve.
2. deoxygenation exhaust steam condenser system is reclaimed in condensed water demineralized water mixing according to claim 1, it is characterized in that: the annular water distributor that the mouth of pipe that described first water inlet pipe, the second water inlet pipe, the 3rd water inlet pipe and the 4th water inlet pipe are positioned at pressure-bearing surge tank is connected to along the horizontal plane and the inner peripheral wall of pressure-bearing surge tank extends, the middle and lower part of each described annular water distributor is evenly distributed with the spray-hole of the axis jet to pressure-bearing surge tank respectively, the axis of each described spray-hole become 30 ° ~ 45 ° angles with horizontal plane and respectively with the axes intersect of pressure-bearing surge tank.
3. deoxygenation exhaust steam condenser system is reclaimed in condensed water demineralized water mixing according to claim 1, it is characterized in that: the inner chamber middle and lower part of described pressure-bearing surge tank is provided with Forced Mixing impeller, described Forced Mixing impeller is fixedly connected on Forced Mixing impeller axle, described Forced Mixing impeller axle vertically downward through pressure-bearing surge tank base plate and and realize sealing pressure-bearing surge tank base plate, the lower end of described Forced Mixing impeller axle is connected with Forced Mixing impeller drive motor.
4. deoxygenation exhaust steam condenser system is reclaimed in condensed water demineralized water mixing according to claim 1, it is characterized in that: the intracavity bottom of described pressure-bearing surge tank is provided with disturbance impeller, described disturbance impeller is fixedly connected on disturbance impeller axle, described disturbance impeller axle vertically downward through pressure-bearing surge tank base plate and and realize sealing pressure-bearing surge tank base plate, the lower end of described disturbance impeller axle is connected with disturbance impeller drive motor; Described disturbance impeller axle departs from the axis of described pressure-bearing surge tank, and the plate inner wall of described pressure-bearing surge tank is provided with eddy current baffle plate, and described eddy current baffle plate is perpendicular to base plate and extend along base plate diametric(al).
5. deoxygenation exhaust steam condenser system is reclaimed in condensed water demineralized water mixing according to claim 1, it is characterized in that: described sewage draining exit is provided with multiple, be divided into inner ring sewage draining exit and outer ring sewage draining exit two groups, each inner ring sewage draining exit to be evenly distributed on close to pressure-bearing surge tank axis circumferentially, each outer ring sewage draining exit to be evenly distributed on away from pressure-bearing surge tank axis circumferentially, and each inner ring sewage draining exit and each outer ring sewage draining exit are distributed on the different-diameter of base plate.
6. deoxygenation exhaust steam condenser system is reclaimed in condensed water demineralized water mixing according to claim 5, it is characterized in that: described inner ring sewage draining exit and outer ring sewage draining exit are respectively provided with four, the angle between each inner ring sewage draining exit place diameter and adjacent sewage draining exit place, outer ring diameter is 45 °.
7. deoxygenation exhaust steam condenser system is reclaimed in condensed water demineralized water mixing according to claim 1, it is characterized in that: the intracavity bottom of described pressure-bearing surge tank is provided with sampling pipe, it is outer and be connected with sampling cooler that described sampling pipe stretches out pressure-bearing surge tank, the export pipeline of described sampling cooler is provided with online electric conductivity detector and online Ph value detector.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420313485.5U CN204042849U (en) | 2014-06-13 | 2014-06-13 | Deoxygenation exhaust steam condenser system is reclaimed in the mixing of condensed water demineralized water |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420313485.5U CN204042849U (en) | 2014-06-13 | 2014-06-13 | Deoxygenation exhaust steam condenser system is reclaimed in the mixing of condensed water demineralized water |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106439784A (en) * | 2016-10-27 | 2017-02-22 | 东莞理工学院 | Full-automatic deaerator exhausting heat energy recycling method and system for achieving method |
| CN110220184A (en) * | 2019-07-03 | 2019-09-10 | 天津市天元机械制造有限公司 | A kind of Boiler Steam condensate recyclable device |
-
2014
- 2014-06-13 CN CN201420313485.5U patent/CN204042849U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106439784A (en) * | 2016-10-27 | 2017-02-22 | 东莞理工学院 | Full-automatic deaerator exhausting heat energy recycling method and system for achieving method |
| CN106439784B (en) * | 2016-10-27 | 2018-05-08 | 东莞理工学院 | A kind of full-automatic deaerator exhaust heat energy recycle method and its system |
| CN110220184A (en) * | 2019-07-03 | 2019-09-10 | 天津市天元机械制造有限公司 | A kind of Boiler Steam condensate recyclable device |
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Effective date of registration: 20190108 Address after: 212200 No. 566 Ganglong Road, Yangzhong Economic Development Zone, Zhenjiang City, Jiangsu Province Patentee after: Jiangsu Yihaitang Environmental Technology Co., Ltd. Address before: 212200 No. 566 Ganglong Road, Yangzhong Economic Development Zone, Zhenjiang City, Jiangsu Province Patentee before: JIANGSU BAVI ENERGY SAVING SERVICE CO., LTD. |
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Granted publication date: 20141224 Termination date: 20200613 |
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