JPH07171332A - Shower tunnel type exhaust gas purification device having waste water regeneratong ability - Google Patents

Abstract

PURPOSE: To prevent the exhaustion from being hindered even if the showering time is extended but to promote the exhaustion instead by connecting a pipeline having a vacuum concentration drier connected to the pipeline and a mechanical booster between a vacuum evaporation chamber and the upper part of a condenser. CONSTITUTION: A waste showered water is passed through a heat-exchange coiled pipeline R1 provided in an exhaust gas inlet 12, the heat is exchanged with the waste exhaust heat therein, and the waste water is introduced into a vacuum evaporation chamber 40, then evaporated and vaporized. At this time, the waste showered water which has not been evaporated and vaporized is collected in a vacuum concentration drier 50 along a pipeline r5 to settle the contaminant sludge in a storage 52. Meanwhile, the cooled concentrated waste water is delivered to the cooling water of a condenser 60 by a vacuum extrusion pump P3 , allowed to exchange the heat, reheated in the cooling-water chamber 61 of the condenser 60, recovered along a pipeline R3 in the drier 50, vacuum-evaporated and concentrated, and the heat of vaporization is regenerated and used.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shower tunnel type exhaust gas purification device having a waste water regenerating capability, and in particular, by exchanging waste water which is inevitably generated from a cleaning type exhaust gas purification device by exchanging heat from the exhaust gas. Exhaust gas is cooled not only to facilitate evaporation but also to remove waste heat, so that a high amount of cleaning water and a small amount of cleaning water can be obtained to obtain a high cleaning ability and result, and the water vapor evaporated from the vacuum evaporation chamber and the vacuum concentration dryer can be removed. Wastewater regeneration capacity that facilitates condensation liquefaction of the condenser by increasing the vapor pressure and raising the condensation temperature by utilizing a mechanical booster or fluid induction compression molecular pump, and reusing the heat of vaporization when necessary The present invention relates to a shower tunnel type exhaust emission control device.

[0002]

2. Description of the Related Art In consideration of conventional exhaust gas purification technology, a dry type and a falling type cooling tower using an electrostatic precipitator, a cyclone, a filter trap, etc.
er) or showering and other wet methods such as showering, but in the case of a dry method, fine particles such as dust and soot are used.
s) is effective, but Sox, Nox, Co, Hcl
It is not suitable for harmful gases such as, and especially in the case of an electrostatic precipitator, there are drawbacks such as high facility cost and a problem of life.

[0003]

In the case of a wet type, it has an advantage in that it has a better exhaust gas purification capability than in a dry type, but due to the waste water problem inevitably generated in the exhaust gas cleaning process, a huge amount of waste water treatment facilities and waste water are required. The problems of location restrictions and uneconomical problems due to the costs associated with the operation of treatment facilities are raised.

Especially when a large amount of exhaust gas is discharged from a power plant, a steel mill, etc., the showering time must be extended for sufficient cleaning. Will cause problems in the combustion system.

[0005]

SUMMARY OF THE INVENTION Therefore, the present invention eliminates the above-mentioned drawbacks of the prior art and, regardless of how long the showering time is extended, does not change the hindrance to the exhaust gas and promotes the shower tunnel clubbing structure and the exhaust gas. A vacuum heat exchange exhaust device that recovers waste heat, a vacuum distillation-type wastewater regeneration and supply system that uses waste heat, and vacuum condensation and drying of concentrated wastewater to solidify air pollutants that are liquefied and precipitated in the wastewater. It is an object of the present invention to provide a shower tunnel exhaust gas purification apparatus having a wastewater regenerating capability, such as a vacuum concentration / drying apparatus for concentrated wastewater that can be extracted and easily and economically disposed of.

[0006]

To achieve the above object, the present invention is directed to an exhaust gas inlet connected to an exhaust gas exhaust source, a vacuum heat exchange exhaust pipe, an upper and lower zigzag shower tunnel and a cooling exhaust pipe at its end. And a shower water storage tank at the bottom of this tunnel, and a vacuum concentrator / dryer having a vacuum evaporation chamber and a waste water concentrated sludge reservoir is formed and connected to one side of the tunnel. There is a distilled water tank at the bottom of the condenser connected to the vacuum pump, and a pipeline having a mechanical booster and a pipeline connected to the vacuum concentrator / dryer is provided between the vacuum evaporation chamber and the condenser. Between the vacuum concentrator / dryer and the condenser, there is connected a pipeline for heat exchange in the condenser by the vacuum extrusion pump and sending out.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS This will be described in detail below with reference to the accompanying drawings.

A pipe line r ₁ drawn from a cooling water chamber of a vacuum heat exchange exhaust pipe 30 is connected to the exhaust gas inlet 12 in FIG. 1, and a pipe line R ₁ drawn from the lower part to the upper part of the inside is drawn to the outside. The exhaust gas inlet 12 is connected to the upper part of the vacuum heat exchange exhaust pipe 30, and the lower part of the vacuum heat exchange exhaust pipe is connected to the lower part of the upper and lower zigzag type shower tunnels 10. In the upward shower tunnel 16A of the tunnel 10, upward injection nozzles 11A having a constant angle are arranged at a constant height interval (see FIG. 2B). In the downward shower tunnel 16B, downward injection nozzles 11B having a constant angle are arranged. Baffle having an arc-shaped cross section at the center where the injection numbers are concentrated
5B is located, the upper and lower guide baffles 15 having an exhaust passage 15A are installed in the upper part of the guide baffle 15 (see FIG. 2 (a)), and the shower water storage is installed in the lower part. Place the tank 20 to allow the inflow of water,
On the other hand, at the end of the final upward shower tunnel or at the exhaust port on one side, a cooling pipe 32 is arranged so as to induce exhaust by an air pump AP and to induce discharge. At this time, as shown in FIG. 4, the cooling exhaust pipe is provided with a peripheral wall and a water chamber 32a projecting upward in the center to cool the exhaust gas, while rotating the inside and discharging it to the outside.

On the other hand, in the lower part of the vacuum evaporation chamber 40, a flat valve fv ₁ is arranged and a pipe line r ₃ closed at a constant water level is connected to the shower storage tank 20, and a pipe having an extrusion pump P ₁ from the bottom thereof. It is made to flow into the cooling water chamber 31 of the vacuum heat exchange exhaust pipe 30 by the passage r ₄ . Then, on one side thereof, a vacuum concentrating and drying machine 5 having a steam jacket or an appropriate heating means installed on the outer periphery is provided.
0 is connected by a pipe line r ₅ , and this is also a flot valve f
The water level is controlled by v ₂ , and a condensed sludge storage 52 of the lower concentrated waste water is provided, and the condenser 6 on one side thereof is provided.
0 has a distilled water tank 70 at the bottom thereof, a vacuum pump P is connected to one side of the condenser, and a vacuum extrusion pump P ₂ is arranged below the distilled water tank 70 to provide a shower water storage tank 2
0 has a pipe line r ₆ for extruding distilled water.

[0010] Then, a configuration in which conduit R that has a linked vacuo drier 50 and a mechanical blanking Star conduit R ₂ is connected between the condenser 60 the upper and the vacuum evaporation chamber 40.

On the other hand, between the vacuum evaporation chamber 40 and the condenser 60, the concentrated waste water, which has been deprived of heat due to the loss of heat of vaporization in the vacuum evaporation chamber 40, is transferred to the condenser cooling water chamber using a vacuum extrusion pump P _3. After the heat is sent out and the heat of vaporization is recovered by further exchanging heat in the condenser, the heat of vaporization is reused by sending it to the vacuum concentrator / dryer 50 to save the heating energy of the vacuum concentrator / dryer 50. You can also

In the drawings, an unexplained reference numeral 100 is a boiler, 20
0 is a burner.

In the present invention, the shower tunnel is installed vertically, but it may be installed horizontally if necessary, and each shower water storage tank can also be installed separately at another suitable place, if necessary. The position of each part can be changed in design depending on the site condition and the type and form of the exhaust gas emission source, and is considered to belong to the gist of the present invention.

Considering the operation state of the present invention constructed as above, the exhaust gas containing waste heat passes through the coiled pipe line R ₁ of the exhaust gas inlet 12 and the vacuum heat exchange exhaust pipe 30. However, the exhaust waste heat is taken away, and the shower water jet nozzle 31N firstly cleans and further cools and enters a large number of upward and downward shower tunnels 10, but the downward shower tunnel 16B. In the case of entering the shower water, the jet water is guided to the center of the shower tunnel through the exhaust passage 15A of the jet water guide baffle 15 that covers the jet water blind spot of the downward jet nozzle 11B. At this time, the exhaust gas is intensively jetted to the shower tunnel center. The exhaust gas is discharged in a process of merging with the baffle 15B located in the center of the lower portion of the exhaust passage 15A while propagating downward. Cleaning performance is to be improved is stirred gas and shower water.

Further, in the upward shower tunnel 16A, the exhaust gas rises together with the shower water that is intensively jetted upward by the upward jet nozzle 11A, and at this time, the jet water guide baffle 15 is moved upward as necessary. It can also be installed.

Exhaust gas that is washed after repeatedly undergoing such a process is repeatedly concentrated and dispersed in multiple stages, and the injection energy of the injection number expels the injection number and injection speed, while promoting the exhaust. Air pollutants contained in the exhaust gas, which are washed through repeated contact with shower water, are mixed, precipitated, and liquefied to prevent the release of harmful pollutants into the atmosphere. In particular, in the process of passing the exhaust gas, the exhaust waste heat is heat-exchanged and the exhaust gas is cooled and exhausted, while the shower waste water that has become hot due to the heat exchange with the exhaust waste heat is the heat provided in the exhaust gas inlet 12. While passing through the exchange coil pipe line R ₁ , the exhaust heat is again heat-exchanged with the exhaust waste heat to be flown into the vacuum evaporation chamber 40 in a state where evaporation is easy. In this way, the shower waste water that has become hot by absorbing and exchanging exhaust waste heat for the second time enters the vacuum evaporation chamber 40, but due to the combined function of the instantaneous pressure and the vacuum environment entering the vacuum evaporation chamber 40. It will evaporate and vaporize while being ejected to explode. At this time, the shower wastewater that could not be vaporized or vaporized is deprived of the vaporized temperature due to the loss of the vaporization heat, becomes thicker and gathers in the lower portion of the vacuum vaporization chamber 40, and is further vacuum concentrated along the pipe line r _5. As it collects in the dryer 50 and is vacuum concentrated and dried, a small amount of pollutant sludge is deposited in the storage 52.

On the other hand, this concentrated wastewater, the temperature of which has been lowered due to the loss of heat of vaporization, is sent to the cooling water of the condenser 60 by the vacuum extrusion pump P ₃ if necessary, and the vapor evaporated from the vacuum evaporation chamber and the vacuum concentrating dryer. The heat of vaporization can be reused by being reheated in the cooling water chamber 61 of the condenser 60 while being heat-exchanged and recovered along the line R ₃ in the vacuum concentrator / dryer 50 to be vacuum evaporated and concentrated. If necessary, the vacuum concentrating / drying machine 50 can also accelerate evaporation by steam beating or electric heating.

On the other hand, when the vaporization heat regeneration use circuit is not adopted, separate cooling water can be directly supplied to the condenser for use.

The distilled water condensed and liquefied through the above process is regenerated and supplied to the shower water storage tank 20 by the vacuum extrusion pump P ₂ connected to the distilled water tank 70 at the bottom.
At this time, the shower waste water in the shower water storage tank 20 is filtered by a vacuum filter to collect and remove the particulate matter in the shower water on a filter cloth.

On the other hand, the sludge accumulated in the sludge storage 52 under the vacuum concentrator / dryer 50 is periodically extruded or withdrawn and discarded.

[0021]

INDUSTRIAL APPLICABILITY The present invention constructed and operated as described above does not interfere with the emission of air pollutants contained in the exhaust gas generated from a large building, a combustion device of an industrial body, a power plant or the like. The shower wastewater generated in this process is evacuated by exhaust gas by a method such as vacuum exchange to prevent exhaustion of pollutants into the air by liquefying and precipitating it in water by performing sufficient showering while warping the exhaust. There is a long-term advantage of absorbing the evaporation and finally condensing the air pollutants contained in the exhaust gas at a low temperature by vacuum-condensing and drying them into a small amount of solid form.

[Brief description of drawings]

FIG. 1 is a front view showing the present invention partially in section.

2 (a) and 2 (b) are enlarged sectional views of "A" and "B" portions in FIG.

FIG. 3 is a perspective view of the cooling water chamber of the present invention.

FIG. 4 is an enlarged sectional view of a “C” portion in FIG.

[Explanation of symbols]

10 ... Tunnel, 12 ... Exhaust gas inlet, 11A ... Upward injection nozzle, 11B ... Downward injection nozzle, 15 ... Guide baffle, 15A ... Exhaust passage, 15B ... Baffle, Le, 16
A ... Upward shower tunnel, 16B ... Downward shower tunnel, 20 ... Shower water storage tank, 30 ... Vacuum heat exchange exhaust pipe, 31 ... Cooling water, 32 ... Cooling exhaust pipe, 40 ... Vacuum evaporation chamber, 50 ... Vacuum concentration Dryer, 60 ... Condenser (C
ondenser), 70 ... distilled water tank, 80 ... fluid-induced compression molecular pump, V ₁ ... pressure control valve, R,
R ₁ , R ₃ , r _{1 to} r ₅ ... Pipe line, P ... Vacuum pump, P ₁
... extrusion pump, P _2, P ₃ ... vacuum extrusion pump.

Claims (1)

[Claims] 1. A vacuum heat exchange exhaust pipe (30) having an exhaust gas inlet (12) and a cooling water chamber (31) for exhaust gas waste heat recovery and exhaust gas cooling, is connected to the vacuum heat exchange exhaust pipe. Upper and lower zigzag shower tunnel (1
0) and an upward shower tunnel (16)
In A), the upward jet nozzles (11A) are arranged at regular intervals and angles, and the downward shower nozzle (11B) is arranged in the downward shower tunnel (16B) at regular intervals and angles. The arc-shaped baffle (15B) is located in the center where it is concentrated, and the upper and lower narrow guide baffles (15) that have the exhaust passage (15A) in the center of the bottom are installed at the upper part of the baffle (15B). A cooling exhaust pipe (32) is provided so that water is introduced into the tank (20), and a final stage is provided with a cooling exhaust pipe (32) which is exhausted by an air pump (AP) to be discharged. ) A pipe line (R ₁ ) drawn inside by coiling for heat exchange is inserted into the vacuum evaporation chamber (40), and the shower storage tank (20)
Water in the vacuum evaporation chamber flot valve (f
v ₁ ), or by an automatic control valve to flow in through a pipe (r ₃ ), and the cooling water chamber (3
1) is delivered by an extrusion pump (P ₁ ) through a pipe line (r ₄ ), and the upper part of this cooling water chamber is provided with a pipe line (r ₁ ).
Is connected to the pipe line (R ₁ ) by means of a pipe line (r) between the bottom of the vacuum heat exchange exhaust pipe and the shower water storage tank (20).
₂ ) is connected, a vacuum evaporation chamber (40), a vacuum concentrating dryer (50) having a heating means and a sludge storage (52) in the lower part are connected by a pipe line (r ₅ ), and vacuum evaporation is performed. The steam vaporized and evaporated in the chamber and the vacuum concentrator / dryer is installed along the pipe (R) so as to be pressurized by the mechanical booster (80) and sent to the condenser (60),
The bottom of the condenser has a distilled water tank (70), which is sent by a vacuum extrusion pump (P ₂ ) to a shower water storage tank (20) by a pipe line (r ₆ ), and a vacuum is provided on one side of the condenser. A shower tunnel type exhaust emission control device that does not discharge wastewater, characterized in that a pump (P) is installed.