CN101838044A - Method and device for eliminating foam Lurgi furnance coal gas wastewater treatment process - Google Patents

Abstract

The invention discloses a method and a device for eliminating foam in the process of treating waste water from coal gas produced by a Lurgi furnace, and relates to a method and a device for eliminating foam in the process of treating waste water produced in coal gas. The invention solves the problems of severe foam, large water consumption for defoaming, high operating cost and affecting normal operation of the system during the treatment of Lurgi furnace coal gas waste water. Method one of the present invention adopts the treated waste water in the sedimentation tank or the clear water pond as the defoaming water source, adopts the treated waste water and the sewage treatment defoamer to mix as the defoaming water source in the method two of the present invention, two kinds of methods of the present invention are according to Lurgi oven The characteristics of foam generation in the process of aerobic biochemical treatment of coal gas wastewater set up the defoaming strength, service area, pressure and distribution of water distributors. Method 1 uses the water pump of the device to be placed in a sedimentation tank or a clear water tank, and Method 2 uses the water pump of the device to be placed in a special defoaming pool. The invention is applicable to the field of industrial waste water treatment for eliminating foam in the coal gas waste water treatment process.

Description

Method and device for eliminating foam in Lurgi furnace coal gasification wastewater treatment process

technical field

The invention relates to a method and device for eliminating foam in the process of coal gas wastewater treatment, belonging to the field of industrial wastewater treatment.

Background technique

At present, due to the severe problem of natural gas shortage in my country, the coal-to-natural gas technology has a lot of room for development. Although technologies such as Shell dry pulverized coal and Lurgi crushed coal fixed bed are relatively mature. However, from the perspective of methane content and investment costs in coal-to-gas, the Lurgi furnace occupies an important position in the field of coal-to-gas. However, the waste water produced in the Lurgi furnace coal-to-gas process is a typical high-concentration toxic and harmful industrial waste water that is difficult to biodegrade. Not only the water volume is as high as several thousand to ^tens of thousands A large amount of toxic and harmful substances such as phenols, alkanes, aromatic hydrocarbons, heterocyclics, ammonia nitrogen and cyanide. In addition, the coal chemical industry wastewater contains organic substances of various chromophores and auxochromophores, and the organic substances have the characteristics of high chroma and turbidity. Therefore, the problem of Lurgi furnace coal gas waste water treatment has become a bottleneck restricting the development of the coal chemical industry.

The treatment of Lurgi furnace coal gasification wastewater has always been a major problem in the field of wastewater treatment at home and abroad. At present, the treatment technology of Lurgi furnace coal gasification wastewater is mainly based on aerobic biological process. In the process of coal gasification wastewater treatment, this process has a good removal effect on ammonia nitrogen and organic matter, but the problem often encountered in this process is that a large amount of foam is generated during operation, which affects the normal operation of the wastewater treatment process and causes Operating costs and labor intensity have risen substantially. Therefore, the problem of defoaming is generally considered in the treatment process of Lurgi furnace coal gasification wastewater. The common defoaming methods include using defoaming agent for sewage treatment or spraying defoaming with external water source. Although the defoaming effect of sewage treatment defoamer is very good, it will increase the operating burden and high operating cost of the wastewater treatment system; the external water source defoaming consumes a lot of water and will affect the normal operation of the wastewater treatment system.

Contents of the invention

The object of the present invention is to provide a method and device for eliminating foam in the treatment process of Lurgi furnace coal gas waste water, so as to solve the problem of severe foam, large water consumption for defoaming and running Problems that are costly and affect the normal operation of the system.

The technical scheme that the present invention takes for solving the problems of the technologies described above is:

Method one for eliminating foam in the Lurgi furnace coal-to-gas wastewater treatment process of the present invention is completed in this way:

Step 1: Use the treated wastewater in the sedimentation tank or clear water tank in the wastewater treatment system as the defoaming water source;

Step 2: Pump out the defoaming water source in the sedimentation tank or clear water tank and send it to the defoaming cloth water pipe network erected above the aerobic tank;

Step 3: The defoaming water source is transported to the short water distribution pipe at each defoaming hole through the defoaming water distribution pipe network, and sprays the foam in the aerobic pool through each water distributor, and at the same time passes through each short water distribution pipe The regulating valve adjusts the water spray pressure of the corresponding water distributor. The front end of the aerobic pool is the defoaming enhanced area, which accounts for 20-40% of the total length of the aerobic pool. Each water distribution area in the defoamed enhanced area The defoaming strength of the device is 2-10L/min·m ² , the service area of each water distributor in the defoaming enhanced area is 5-15m ² , and the design pressure of each water distributor in the defoaming enhanced area is 0.01- 0.1MPa, the distance between two adjacent water distributors in the defoaming enhanced area is 1.5-5m; the rear end of the aerobic pool is the normal defoaming area, and the normal defoaming area accounts for 60-80% of the total length of the aerobic pool. The defoaming strength of each water distributor in the normal defoaming area is 0.5-5L/min·m ² , the service area of each water distributor in the normal defoaming area is 10-25m ² , each The design pressure of the water distributor is 0.01-0.1MPa, and the distance between two adjacent water distributors in the normal defoaming area is 1.5-5m.

The present invention is used to eliminate foam in the method 1 of Lurgi furnace coal gas waste water treatment process. Adjust the valve and multiple water distributors. Each water distribution branch pipe of the defoaming water distribution pipe network has a plurality of defoaming holes, and each defoaming hole is fixedly installed with a short water distribution pipe. A water distributor is installed at the lower end of the short water pipe, and a regulating valve is installed on each short water distribution pipe. The water distribution main pipe of the defoaming water distribution pipe network is connected with the water pump through the water inlet pipe, and the water pump is placed in the sedimentation tank. Or inside the clean water pool, the main water inlet valve is installed on the water inlet pipe.

Method two for eliminating foam in the Lurgi furnace coal-to-gas waste water treatment process of the present invention is accomplished like this:

Step 1: Lead the treated wastewater in the sedimentation tank or clear water tank in the wastewater treatment system into the special defoaming tank;

Step 2: Add defoamer for sewage treatment into the special defoaming pool, mix the defoamer for sewage treatment with treated wastewater as the source of defoaming water, the mass ratio of defoamer for sewage treatment and treated wastewater is: (1-40 ): 200;

Step 3: Pump the defoaming water source in the special defoaming pool and send it to the defoaming cloth water pipe network erected above the aerobic pool;

Step 4: The defoaming water source is transported to the short water distribution pipe at each defoaming hole through the defoaming water distribution pipe network, and sprays the foam in the aerobic pool through each water distributor, and at the same time passes through each short water distribution pipe The regulating valve adjusts the water spray pressure of the corresponding water distributor. The front end of the aerobic pool is the defoaming enhanced area, which accounts for 20-40% of the total length of the aerobic pool. Each water distribution area in the defoamed enhanced area The defoaming strength of the device is 2-10L/min·m ² , the service area of each water distributor in the defoaming enhanced area is 5-15m ² , and the design pressure of each water distributor in the defoaming enhanced area is 0.01- 0.1MPa, the distance between two adjacent water distributors in the defoaming enhanced area is 1.5-5m; the rear end of the aerobic pool is the normal defoaming area, and the normal defoaming area accounts for 60-80% of the total length of the aerobic pool. The defoaming strength of each water distributor in the normal defoaming area is 0.5-5L/min·m ² , the service area of each water distributor in the normal defoaming area is 10-25m ² , each The design pressure of the water distributor is 0.01-0.1MPa, and the distance between two adjacent water distributors in the normal defoaming area is 1.5-5m.

The method 2 of the present invention for eliminating foam in the waste water treatment process of Lurgi furnace coal gasification. The foam eliminating device includes a special defoaming pool, a water pump, a main water inlet valve, a water inlet pipe, a defoaming water distribution pipe network, and a plurality of water distribution devices. Short pipes, multiple regulating valves and multiple water distributors, each water distribution branch pipe of the defoaming water distribution pipe network has multiple defoaming holes, and each defoaming hole is fixedly installed with a water distribution short pipe A water distributor is installed at the lower end of each short water distribution pipe, and a regulating valve is installed on each short water distribution pipe. The water distribution main pipe of the defoaming water distribution pipe network communicates with the water pump through the inlet pipe. The main water inlet valve is installed on the water inlet pipe, and the water pump is placed inside the special defoaming pool.

Compared with the prior art, the present invention has the following effects: the defoaming water source in the method one of the present invention adopts the sedimentation tank in the waste water treatment system or the treated waste water in the clear water pond; The foaming agent is mixed as the defoaming water source. The two methods of the present invention set the defoaming strength according to the characteristics of the foam generation in the aerobic biochemical treatment process of Lurgi furnace coal gas waste water, the service area, pressure and pressure of the water distributor. Distribution. During the aerobic biochemical treatment of Lurgi furnace coal gas wastewater, there are serious foaming problems, large water consumption for defoaming, high operating costs and affecting the normal operation of the system. The invention has the advantages of water saving, low foam layer without overflow, low operating cost and stable system operation after defoaming. The foam eliminating device of the present invention has the advantages of simple structure and easy operation and control.

Description of drawings

Fig. 1 is the schematic front view of the device one for eliminating foam of the present invention, Fig. 2 is the top view of device one for eliminating foam of the present invention (the defoaming cloth water pipe network 8 in the figure is a branched pipe network structure), Fig. 3 is the present invention The top view of the device one for eliminating foam in the invention (the defoaming cloth water pipe network 8 in the figure is a circulation pipe network structure), Fig. 4 is a schematic front view of the device two for eliminating foam of the present invention, and Fig. 5 is a device for eliminating foam of the present invention The top view of two (the defoaming water distribution pipe network 8 in the figure is a branched pipe network structure), and Fig. 6 is a top view of the device two for eliminating foam of the present invention (the defoaming water distribution pipe network 8 in the figure is a circulating pipe network structure).

Detailed ways

Specific embodiment one: illustrate this embodiment in conjunction with Fig. 1-Fig. 3, the method one of eliminating foam in the Lurgi furnace coal-to-gas wastewater treatment process of this embodiment is finished like this:

Step 1: using the treated wastewater in the sedimentation tank or clear water tank 5 in the wastewater treatment system as the defoaming water source;

Step 2: extract the defoaming water source in the sedimentation tank or the clear water tank 5 through the water pump 6 and send it to the defoaming cloth water pipe network 8 erected above the aerobic tank 2;

Step 3: The defoaming water source is delivered to the short water distribution pipe 9 at each defoaming hole 8-1 through the defoaming water distribution pipe network 8, and the foam in the aerobic pool 2 is sprayed through each water distributor 11, At the same time, the water spray pressure of the corresponding water distributor 11 is regulated by the regulating valve 10 on each water distribution short pipe 9. The front end of the aerobic pool 2 is a defoaming enhanced area, and the defoaming enhanced area accounts for 2% of the total length of the aerobic pool 2. 20-40%, the defoaming strength of each water distributor 11 in the defoaming enhanced zone is 2-10L/min·m ² , the service area of each water distributor 11 in the defoaming enhanced zone is 5-15m ² , The design pressure of each water distributor 11 in the defoaming enhanced area is 0.01-0.1MPa, and the distance between two adjacent water distributors 11 in the defoamed enhanced area is 1.5-5m; Foaming area, the normal defoaming area accounts for 60-80% of the total length of the aerobic pool 2, the defoaming strength of each water distributor 11 in the normal defoaming area is 0.5-5L/min·m ² , the normal defoaming area The service area of each water distributor 11 is 10-25m ² , the design pressure of each water distributor 11 in the normal defoaming area is 0.01-0.1MPa, and the distance between two adjacent water distributors 11 in the normal defoaming area 1.5-5m.

Specific embodiment 2: The difference between this embodiment and specific embodiment 1 is that the defoaming strength of each water distributor 11 in the defoaming enhanced zone in step 3 is 2-4L/min·m ² , and the normal defoaming zone The defoaming strength of each water distributor 11 is 0.5-2L/min·m ² . With such a design, the defoaming effect is better.

Specific embodiment 3: The difference between this embodiment and specific embodiment 1 is that the defoaming strength of each water distributor 11 in the defoaming enhanced zone in step 3 is 4-6L/min·m ² , and that in the normal defoaming zone The defoaming strength of each water distributor 11 is 2-3L/min·m ² . With such a design, the defoaming effect is better.

Embodiment 4: The difference between this embodiment and Embodiment 1 is that the defoaming intensity of each water distributor 11 in the defoaming enhanced area in step 3 is 6-10L/min·m ² , and that in the normal defoaming area The defoaming strength of each water distributor 11 is 3-5L/min·m ² . With such a design, the defoaming effect is better.

Embodiment 5: This embodiment is different from Embodiment 1, 2, 3 or 4 in that: the service area of each water distributor 11 in the defoaming enhancement zone in step 3 is 5-10m ² , and the normal defoaming The service area of each water distributor 11 in the district is 10-15m ² . With such a design, the defoaming effect is better.

Embodiment 6: This embodiment differs from Embodiment 1, 2, 3 or 4 in that: the service area of each water distributor 11 in the defoaming enhancement zone in Step 3 is 10-15m ² , and the normal defoaming The service area of each water distributor 11 in the district is 15-25m ² . With such a design, the defoaming effect is better.

Embodiment 7: The difference between this embodiment and Embodiment 1, 2, 3, 4, 5 or 6 is that the design pressure of each water distributor 11 in the defoaming enhancement zone in step 3 is 0.01-0.05MPa , the design pressure of each water distributor 11 in the normal defoaming zone is 0.01-0.05MPa. With such a design, the defoaming effect is better.

Embodiment 8: The difference between this embodiment and Embodiment 1, 2, 3, 4, 5 or 6 is that the design pressure of each water distributor 11 in the defoaming enhancement zone in step 3 is 0.05-0.1MPa , the design pressure of each water distributor 11 in the normal defoaming zone is 0.05-0.1MPa. With such a design, the defoaming effect is better.

Specific Embodiment Nine: The difference between this embodiment and specific embodiments 1, 2, 3, 4, 5, 6, 7 or 8 is: the distance between two adjacent water distributors 11 in the defoaming enhanced area in step 3 The distance between two adjacent water distributors 11 in the normal defoaming area is 1.5-3m. With such a design, the defoaming effect is better.

Embodiment 10: The difference between this embodiment and Embodiment 1, 2, 3, 4, 5, 6, 7 or 8 is: the distance between two adjacent water distributors 11 in the defoaming enhanced area in step 3 The distance between two adjacent water distributors 11 in the normal defoaming area is 3-5m. With such a design, the defoaming effect is better.

Specific Embodiment Eleven: This embodiment is described in conjunction with Fig. 1-Fig. 3. The device for eliminating foam in the Lurgi furnace coal-to-gas wastewater treatment process of this embodiment includes a water pump 6, a main water inlet valve 7, a water inlet pipe 16, a Foam cloth water pipe network 8, a plurality of water distribution short pipes 9, a plurality of regulating valves 10 and a plurality of water distributors 11, each water distribution branch pipe 8-3 of the defoaming water distribution pipe network 8 is provided with multiple Defoaming holes 8-1, each of the defoaming holes 8-1 is fixed with a water distribution short pipe 9, and the lower end of each water distribution short pipe 9 is equipped with a water distributor 11, each water distribution short pipe 9 are equipped with a regulating valve 10, the water distribution main 8-2 of the defoaming water distribution pipe network 8 communicates with the water pump 6 through the water inlet pipe 16, and the water pump 6 is placed inside the sedimentation tank or the clear water tank 5, and the water inlet Total valve 7 is installed on the water inlet pipe 16. The device for eliminating foam in this embodiment is used to realize the method for eliminating foam in the Lurgi furnace coal-to-gas wastewater treatment process in the first embodiment.

Specific Embodiment Twelve: This embodiment will be described with reference to FIG. 1 . The water distributor 11 of this embodiment is a spiral water distributor. With such setting, the service area of the water distributor is large. Other compositions and connections are the same as those in Embodiment 11.

Specific Embodiment Thirteen: This embodiment is described in conjunction with FIG. 2. The defoaming water distribution pipe network 8 of this embodiment is composed of a water distribution main pipe 8-2 and a plurality of water distribution branch pipes 8-3. The multiple water distribution branch pipes 8- 3 are arranged in parallel, the water distribution main pipe 8-2 communicates with one end of a plurality of water distribution branch pipes 8-3, and the water distribution main pipe 8-2 forms a branched pipe network with a plurality of water distribution branch pipes 8-3, and the multiple distribution pipes The other end of water branch pipe 8-3 is closed. Such a design can save pipe material and construction costs. Other compositions and connections are the same as those in Embodiment 11 or 12.

Specific Embodiment Fourteen: This embodiment is described in conjunction with FIG. 3. The defoaming water distribution pipe network 8 of this embodiment is composed of a water distribution main pipe 8-2, a plurality of water distribution branch pipes 8-3 and a water distribution connecting pipe 8-4. Multiple water distribution branch pipes 8-3 are arranged in parallel, the water distribution main pipe 8-2 communicates with one end of multiple water distribution branch pipes 8-3, and the water distribution connecting pipe 8-4 communicates with multiple water distribution branch pipes 8-3 The other end is connected, and the water distribution main pipe 8-2, a plurality of water distribution branch pipes 8-3 and the water distribution connecting pipe 8-4 form a circulation pipe network. Such a design can ensure the hydraulic reliability of the pipe network. Other compositions and connections are the same as those in Embodiment 11 or 12.

Embodiment 15: This embodiment is described in conjunction with Fig. 1 , the device for eliminating foam in the Lurgi furnace coal-to-gas wastewater treatment process of this embodiment also includes a vent pipe 1 and a vent valve 12, the vent pipe 1 The upper end communicates with any water distribution branch pipe 8-3 in the defoaming water distribution pipe network 8, and the vent valve 12 is installed on the vent pipe 1. This design ensures that the unit operates smoothly in winter and avoids freezing problems. Other compositions and connections are the same as those in Embodiments 11, 12, 13 or 14.

Specific embodiment sixteen: illustrate this embodiment in conjunction with Fig. 4-Fig. 6, the method two of eliminating foam in the Lurgi furnace coal-to-gas wastewater treatment process of this embodiment is accomplished like this:

Step 1: import the treated wastewater in the sedimentation tank or clear water tank 5 in the wastewater treatment system into the special defoaming pool 14;

Step 2: Add a sewage treatment defoamer to the special defoaming pool 14, the sewage treatment defoamer is mixed with the treated waste water as the defoaming water source, the mass ratio of the sewage treatment defoamer mixed with the treated waste water is: (1～ 40): 200;

Step 3: extract the defoaming water source in the special defoaming pool 14 through the water pump 6 and send it to the defoaming cloth water pipe network 8 erected above the aerobic pool 2;

Step 4: The defoaming water source is delivered to the short water distribution pipe 9 at each defoaming hole 8-1 through the defoaming water distribution pipe network 8, and the foam in the aerobic pool 2 is sprayed through each water distributor 11, At the same time, the water spray pressure of the corresponding water distributor 11 is regulated by the regulating valve 10 on each water distribution short pipe 9. The front end of the aerobic pool 2 is a defoaming enhanced area, and the defoaming enhanced area accounts for 2% of the total length of the aerobic pool 2. 20-40%, the defoaming strength of each water distributor 11 in the defoaming enhanced zone is 2-10L/min·m ² , the service area of each water distributor 11 in the defoaming enhanced zone is 5-15m ² , The design pressure of each water distributor 11 in the defoaming enhanced area is 0.01-0.1MPa, and the distance between two adjacent water distributors 11 in the defoamed enhanced area is 1.5-5m; Foaming area, the normal defoaming area accounts for 60-80% of the total length of the aerobic pool 2, the defoaming strength of each water distributor 11 in the normal defoaming area is 0.5-5L/min·m ² , the normal defoaming area The service area of each water distributor 11 is 10-25m ² , the design pressure of each water distributor 11 in the normal defoaming area is 0.01-0.1MPa, and the distance between two adjacent water distributors 11 in the normal defoaming area 1.5-5m.

The model of the defoamer for sewage treatment in this embodiment is L-105, JY-805, XC-25 or HZX-203.

Embodiment 17: This embodiment differs from Embodiment 16 in that the mass ratio of the sewage treatment defoamer mixed with the treated wastewater in step 3 is 20:200. With such a design, the defoaming effect is better.

Embodiment 18: This embodiment is different from Embodiment 16 or 17 in that: the service area of each water distributor 11 in the defoaming enhanced area in step 3 is 5-10m ² , and the normal defoaming area The service area of each water distributor 11 is 10-15m ² . With such a design, the defoaming effect is better.

Embodiment 19: The difference between this embodiment and Embodiment 16 or 17 is that the service area of each water distributor 11 in the defoaming enhanced area in step 3 is 10-15m ² , and the normal defoaming area The service area of each water distributor 11 is 15-25m ² . With such a design, the defoaming effect is better.

Specific embodiment 20: The difference between this embodiment and specific embodiments 16, 17, 18 or 19 is that the design pressure of each water distributor 11 in the defoaming enhancement zone in step 3 is 0.01-0.05 MPa, the design pressure of each water distributor 11 in the normal defoaming zone is 0.01-0.05MPa. With such a design, the defoaming effect is better.

Specific embodiment 21: The difference between this embodiment and specific embodiments 16, 17, 18 or 19 is that the design pressure of each water distributor 11 in the defoaming enhancement zone in step 3 is 0.05- 0.1MPa, the design pressure of each water distributor 11 in the normal defoaming zone is 0.05-0.1MPa. With such a design, the defoaming effect is better.

Specific embodiment 22: The difference between this embodiment and specific embodiments 16, 17, 18, 19, 20 or 21 is that two adjacent cloths in the defoaming enhanced area in step 3 The distance between the water dispensers 11 is 1.5-3m, and the distance between two adjacent water distributors 11 in the normal defoaming area is 1.5-3m. With such a design, the defoaming effect is better.

Specific embodiment 23: The difference between this embodiment and specific embodiments 16, 17, 18, 19, 20 or 21 is that two adjacent cloths in the defoaming enhanced area in step 3 The distance between the water dispensers 11 is 3-5m, and the distance between two adjacent water distributors 11 in the normal defoaming zone is 3-5m. With such a design, the defoaming effect is better.

Specific Embodiment Twenty-Four: This embodiment is described in conjunction with Fig. 4-Fig. 6. The device for eliminating foam in the Lurgi furnace coal gasification wastewater treatment process in this embodiment includes a special defoaming pool 14, a water pump 6, and a main water inlet valve. 7. Water inlet pipe 16, defoaming water distribution pipe network 8, multiple short water distribution pipes 9, multiple regulating valves 10 and multiple water distributors 11, each water distribution branch pipe 8 of the defoaming water distribution pipe network 8- 3 are provided with a plurality of defoaming holes 8-1, and each defoaming hole 8-1 is fixedly equipped with a short water distribution pipe 9, and a water distributor 11 is installed at the lower end of each short water distribution pipe 9. , each water distribution short pipe 9 is equipped with a regulating valve 10, the water distribution main pipe 8-2 of the defoaming water distribution pipe network 8 communicates with the water pump 6 through the water inlet pipe 16, and the water inlet main valve 7 is installed on On the water inlet pipe 16, the water pump 6 is placed inside the special defoaming pool 14. The device for eliminating foam in this embodiment is used to realize the method for eliminating foam in the waste water treatment process of Lurgi furnace coal gasification in the sixteenth embodiment.

Specific Embodiment 25: This embodiment will be described with reference to FIG. 4 . The water distributor 11 of this embodiment is a spiral water distributor. With such a design, the service area of the water distributor is large. Other compositions and connections are the same as those in Embodiment 24.

Specific Embodiment Twenty-six: This embodiment is described in conjunction with FIG. 5. The defoaming water distribution pipe network 8 of this embodiment is composed of a water distribution main pipe 8-2 and a plurality of water distribution branch pipes 8-3. The multiple water distribution branch pipes 8 -3 are arranged in parallel, the water distribution main pipe 8-2 communicates with one end of a plurality of water distribution branch pipes 8-3, and the water distribution main pipe 8-2 forms a branched pipe network with a plurality of water distribution branch pipes 8-3, and multiple The other end of water distribution branch pipe 8-3 is closed. Such a design can save pipe material and construction costs. Other compositions and connections are the same as those in Embodiment 24 or 25.

Specific embodiment twenty-seven: This embodiment is described in conjunction with Fig. 6. The defoaming water distribution pipe network 8 of this embodiment is composed of a water distribution main pipe 8-2, a plurality of water distribution branch pipes 8-3 and a water distribution connecting pipe 8-4. The multiple water distribution branch pipes 8-3 are arranged in parallel, the water distribution main pipe 8-2 communicates with one end of the multiple water distribution branch pipes 8-3, the water distribution connecting pipe 8-4 communicates with the multiple water distribution branch pipes 8- The other end of 3 is connected, and the water distribution main pipe 8-2, a plurality of water distribution branch pipes 8-3 and the water distribution connecting pipe 8-4 form a circulation pipe network. Such a design can ensure the hydraulic reliability of the pipe network. Other compositions and connections are the same as those in Embodiment 24 or 25.

Specific Embodiment Twenty-Eight: This embodiment is described in conjunction with FIG. 4 . The device for eliminating foam in the Lurgi furnace coal-to-gas wastewater treatment process of this embodiment also includes a vent pipe 1 and a vent valve 12. The vent pipe 1 The upper end of the upper end communicates with any one of the water distribution branch pipes 8-3 in the defoaming water distribution pipe network 8, and the vent valve 12 is installed on the vent pipe 1. This design ensures that the unit operates smoothly in winter and avoids freezing problems. Other compositions and connections are the same as those in the twenty-fourth, twenty-fifth, twenty-sixth or twenty-seventh specific embodiments.

Claims (10)

1. eliminate the foamy method in a lurgi coal gasification gas wastewater treatment process, it is characterized in that: this method is finished like this:

Step 1: settling tank in the employing Waste Water Treatment or the waste water of processing in the clean water basin (5) are as the froth breaking water source;

Step 2: extract the froth breaking water source in settling tank or the clean water basin (5) and deliver in the froth breaking water distribution pipe network (8) that sets up Aerobic Pond (2) top by water pump (6);

Step 3: the froth breaking water source also sprays the foam in the Aerobic Pond (2) by each water distributor (11) in froth breaking water distribution pipe network (8) is delivered to the water distribution short tube of locating in each froth breaking hole (8-1) (9), regulate the water spray pressure of corresponding water distributor (11) simultaneously by the regulated valve (10) on each water distribution short tube (9), the front end of Aerobic Pond (2) is the froth breaking enhancement region, the froth breaking enhancement region accounts for the 20-40% of Aerobic Pond (2) total length, and the froth breaking intensity of each water distributor (11) of froth breaking enhancement region is 2-10L/minm ², the service area of each water distributor (11) of froth breaking enhancement region is 5-15m ², the design pressure of each water distributor (11) of froth breaking enhancement region is 0.01-0.1MPa, the spacing of adjacent two water distributors (11) of froth breaking enhancement region is 1.5-5m; The rear end of Aerobic Pond (2) is normal froth breaking district, and normal froth breaking district accounts for the 60-80% of Aerobic Pond (2) total length, and the froth breaking intensity of each water distributor (11) in normal froth breaking district is 0.5-5L/minm ², the service area of each water distributor (11) in normal froth breaking district is 10-25m ², the design pressure of each water distributor (11) in normal froth breaking district is 0.01-0.1MPa, the spacing of adjacent two water distributors (11) in normal froth breaking district is 1.5-5m.

2. eliminate the foamy device in the lurgi coal gasification gas wastewater treatment process of elimination foamy method in the described lurgi coal gasification gas wastewater treatment process of realization claim 1, this device comprises water pump (6), water inlet total valve (7), water inlet pipe (16), froth breaking water distribution pipe network (8), a plurality of water distribution short tubes (9), a plurality of regulated valves (10) and a plurality of water distributor (11), it is characterized in that: all have a plurality of froth breakings hole (8-1) on each water distribution branch pipe (8-3) of described froth breaking water distribution pipe network (8), a water distribution short tube (9) is located to be installed with in each froth breaking hole (8-1), the lower end of each water distribution short tube (9) all is equipped with a water distributor (11), on each water distribution short tube (9) regulated valve (10) is installed all, the water distribution of described froth breaking water distribution pipe network (8) is responsible for (8-2) and is communicated with water pump (6) by water inlet pipe (16), water pump (6) places settling tank or clean water basin (5) inside, and described water inlet total valve (7) is installed on the water inlet pipe (16).

3. according to eliminating the foamy device in the described lurgi coal gasification gas wastewater treatment process of claim 2, it is characterized in that: water distributor (11) is spiral water distributor.

4. according to eliminating the foamy device in the described lurgi coal gasification gas wastewater treatment process of claim 3, it is characterized in that: described froth breaking water distribution pipe network (8) is responsible for (8-2) by water distribution and a plurality of water distribution branch pipe (8-3) is formed, described a plurality of water distribution branch pipe (8-3) be arranged in parallel, described water distribution is responsible for (8-2) and is communicated with an end of a plurality of water distribution branch pipes (8-3), and water distribution is responsible for (8-2) and is formed branched network with a plurality of water distribution branch pipes (8-3), and the other end of a plurality of water distribution branch pipes (8-3) seals.

5. according to eliminating the foamy device in the described lurgi coal gasification gas wastewater treatment process of claim 3, it is characterized in that: described froth breaking water distribution pipe network (8) is responsible for (8-2) by water distribution, a plurality of water distribution branch pipes (8-3) and water distribution communicating pipe (8-4) are formed, described a plurality of water distribution branch pipe (8-3) be arranged in parallel, described water distribution is responsible for (8-2) and is communicated with an end of a plurality of water distribution branch pipes (8-3), described water distribution communicating pipe (8-4), the other end with a plurality of water distribution branch pipes (8-3) was communicated with, and water distribution is responsible for (8-2), a plurality of water distribution branch pipes (8-3) and water distribution communicating pipe (8-4) form circulation pipe network.

6. according to eliminating the foamy device in claim 2,3, the 4 or 5 described lurgi coal gasification gas wastewater treatment process, it is characterized in that: described elimination foamy device also comprises blow-down pipe (1) and blow-off valve (12), the upper end of described blow-down pipe (1) is communicated with any one water distribution branch pipe (8-3) in the froth breaking water distribution pipe network (8), and described blow-off valve (12) is installed on the blow-down pipe (1).

7. eliminate the foamy method in a lurgi coal gasification gas wastewater treatment process, it is characterized in that: this method is finished like this:

Step 1: the waste water of processing in settling tank in the Waste Water Treatment or the clean water basin (5) is imported in the special-purpose froth breaking pond (14);

Step 2: in special-purpose froth breaking pond (14), add the sewage treating and de-foaming agent, the sewage treating and de-foaming agent with handle waste water and mix, sewage treating and de-foaming agent and handle waste water blended mass ratio and be as the froth breaking water source: (1～40): 200;

Step 3: extract the froth breaking water source in the special-purpose froth breaking pond (14) and deliver in the froth breaking water distribution pipe network (8) that sets up Aerobic Pond (2) top by water pump (6);

Step 4: the froth breaking water source also sprays the foam in the Aerobic Pond (2) by each water distributor (11) in froth breaking water distribution pipe network (8) is delivered to the water distribution short tube of locating in each froth breaking hole (8-1) (9), regulate the water spray pressure of corresponding water distributor (11) simultaneously by the regulated valve (10) on each water distribution short tube (9), the front end of Aerobic Pond (2) is the froth breaking enhancement region, the froth breaking enhancement region accounts for the 20-40% of Aerobic Pond (2) total length, and the froth breaking intensity of each water distributor (11) of froth breaking enhancement region is 2-10L/minm ², the service area of each water distributor (11) of froth breaking enhancement region is 5-15m ², the design pressure of each water distributor (11) of froth breaking enhancement region is 0.01-0.1MPa, the spacing of adjacent two water distributors (11) of froth breaking enhancement region is 1.5-5m; The rear end of Aerobic Pond (2) is normal froth breaking district, and normal froth breaking district accounts for the 60-80% of Aerobic Pond (2) total length, and the froth breaking intensity of each water distributor (11) in normal froth breaking district is 0.5-5L/minm ², the service area of each water distributor (11) in normal froth breaking district is 10-25m ², the design pressure of each water distributor (11) in normal froth breaking district is 0.01-0.1MPa, the spacing of adjacent two water distributors (11) in normal froth breaking district is 1.5-5m.

8. eliminate the foamy device in the lurgi coal gasification gas wastewater treatment process of elimination foamy method in the described lurgi coal gasification gas wastewater treatment process of realization claim 7, this device comprises special-purpose froth breaking pond (14), water pump (6), water inlet total valve (7), water inlet pipe (16), froth breaking water distribution pipe network (8), a plurality of water distribution short tubes (9), a plurality of regulated valves (10) and a plurality of water distributor (11), it is characterized in that: all have a plurality of froth breakings hole (8-1) on each water distribution branch pipe (8-3) of described froth breaking water distribution pipe network (8), a water distribution short tube (9) is located to be installed with in each froth breaking hole (8-1), the lower end of each water distribution short tube (9) all is equipped with a water distributor (11), on each water distribution short tube (9) regulated valve (10) is installed all, the water distribution of described froth breaking water distribution pipe network (8) is responsible for (8-2) and is communicated with water pump (6) by water inlet pipe (16), described water inlet total valve (7) is installed on the water inlet pipe (16), and water pump (6) places inside, special-purpose froth breaking pond (14).

9. eliminate the foamy device in the described according to Claim 8 lurgi coal gasification gas wastewater treatment process, it is characterized in that: described froth breaking water distribution pipe network (8) is responsible for (8-2) by water distribution and a plurality of water distribution branch pipe (8-3) is formed, described a plurality of water distribution branch pipe (8-3) be arranged in parallel, described water distribution is responsible for (8-2) and is communicated with an end of a plurality of water distribution branch pipes (8-3), and water distribution is responsible for (8-2) and is formed branched network with a plurality of water distribution branch pipes (8-3), and the other end of a plurality of water distribution branch pipes (8-3) seals.

10. eliminate the foamy device in the described according to Claim 8 lurgi coal gasification gas wastewater treatment process, it is characterized in that: described froth breaking water distribution pipe network (8) is responsible for (8-2) by water distribution, a plurality of water distribution branch pipes (8-3) and water distribution communicating pipe (8-4) are formed, described a plurality of water distribution branch pipe (8-3) be arranged in parallel, described water distribution is responsible for (8-2) and is communicated with an end of a plurality of water distribution branch pipes (8-3), described water distribution communicating pipe (8-4), the other end with a plurality of water distribution branch pipes (8-3) was communicated with, and water distribution is responsible for (8-2), a plurality of water distribution branch pipes (8-3) and water distribution communicating pipe (8-4) form circulation pipe network.

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