Method for removing silt in water body of dust removal water seal flue gas tank of coke oven

Abstract

The invention provides a method for removing silt in a water body of a coke oven dust removal water seal flue gas tank, and relates to the technical field of water body treatment. The method specifically comprises the following steps: step 1, firstly arranging a recycling water tank, additionally arranging a sedimentation tank on the outer side of the recycling water tank, arranging a reflux tank at the bottom end of the lower end of the sedimentation tank, and connecting the reflux tank with the recycling water tank through a clear water reflux pipe; 2, an accident overflow pipe is installed on one side of the upper end of the sedimentation tank, the sedimentation tank is divided into three transverse independent spaces with the same size, a funnel-shaped mud bucket is installed in the middle of the interior of the three independent spaces, and a first electric gate valve is arranged at a discharging opening in the lower end of the mud bucket; a draining tank is arranged at the lower end of the mud bucket in the three independent spaces and is opposite to the lower end of the first electric gate valve. Labor waste and environmental pollution caused by manual dredging and transporting can be avoided, the use efficiency of reuse water is improved, it is guaranteed that the flue gas water seal tank can stably and continuously operate at low cost, and maintenance is easy.

Description

Technical Field

[0001] The invention relates to the technical field of water treatment, in particular to a method for removing mud from a water body in a coke oven dust removal water seal flue gas tank. Background Art

[0002] Coke oven wastewater mainly comes from the water body in the water seal section of the coke oven flue gas pipeline. The water body is in direct contact with the flue gas. The sludge production of a single flue gas water seal recycling pool is about 2-3m³ per week. After the muddy wastewater is precipitated in the recycling pool, the upper clear liquid is reused in the flue gas water seal system. The water in the recycling pool is only in contact with the coke oven dust removal flue gas. The main component of the sludge in the water body is coke powder, which has a small particle size. The nature of the sludge is coke powder, which is a finished by-product of the coking plant and can be used in subsequent processes. Therefore, the sludge can be returned to the production line for reuse after centralized collection and dehydration.

[0003] At present, the seal water of the coking coke pushing and dust removal water seal main pipe is mixed with the coke oven ash, and the coke oven ash is difficult to separate from the water body. The moisture content of the coke powder accumulated in the sedimentation tank after manual cleaning is too high, and the water flows out during the transportation process, causing ground pollution. Currently, most coking plants can only use manual or large-scale machinery to clean the sludge in the water seal water body. Summary of the invention

[0004] Technical issues solved In view of the deficiencies in the prior art, the present invention provides a method for removing mud from the water body of a coke oven dust removal water seal flue gas trough, which solves the problems of difficulty in separating coke oven ash and water body, excessive moisture content of coke powder accumulated in the sedimentation tank after manual cleaning, and ground pollution caused by moisture outflow during transportation. Technical Solution

[0005] To achieve the above objectives, the present invention is implemented by the following technical scheme: A method for removing mud from a water body in a coke oven dust removal water seal flue gas tank, specifically comprising the following steps: Step 1. First, a reuse water pool is set up, and a sedimentation tank is added outside the reuse water pool. A reflux tank is set at the bottom of the sedimentation tank, and the reflux tank and the reuse water pool are connected by a clean water reflux pipe; Step 2. Install an accident overflow pipe on one side of the upper end of the sedimentation tank, and divide the sedimentation tank into three independent spaces of the same size in the horizontal direction. A funnel-shaped mud bucket is installed in the middle of the three independent spaces, and a No. 1 electric gate valve is set at the discharge port at the lower end of the mud bucket. A drain trough is placed at the lower end of the mud bucket in the three independent spaces and faces the lower end of the No. 1 electric gate valve; Step 3. A flue gas water seal tank is arranged at the upper end of the reuse water tank and the sedimentation tank, and a backwash pipe is arranged at the lower end of the flue gas water seal tank. The backwash pipe is connected to the reuse water tank and the sedimentation tank through a reflux pipe, and five clean water ports are arranged at the upper end of the backwash pipe. The clean water ports are arranged horizontally inside the flue gas water seal tank; The flue gas water seal tank is connected to three independent spaces inside the sedimentation tank through a water inlet pipe, and the reuse water pool is connected to the flue gas water seal tank by a clean water pipe, and the clean water pipe is connected to the backwash pipe.

[0006] Preferably, a slag-poking hole is provided at the upper end of one side of the outer wall of the mud bucket, and a back-blowing hole is provided at the lower end of the side of the outer wall of the mud bucket away from the slag-poking hole.

[0007] Preferably, liquid level gauges are installed inside the three independent spaces on one side of the upper end of the mud bucket. Among the three independent spaces, the one located at the upper end of the mud bucket is the clarified liquid area, while the inside of the mud bucket and the lower end of the mud bucket are the impurity area, and the horizontal line of the upper surface of the mud bucket is used as the dividing line. A clear liquid discharge pipe is installed at the dividing line and the lower end of the clear liquid discharge pipe is located at the bottom end of one side of the drain trough.

[0008] Preferably, two No. 1 manual valves are provided on the backwash pipe, one of which is close to the return pipe, and the other is located at the tail end of the flue gas water seal groove. No. 2 manual valves are installed at the five clean water outlets, and one side of the three clean water outlets located in the middle of the five clean water outlets is also equipped with a flushing outlet and a No. 3 manual valve is installed on the flushing outlet.

[0009] Preferably, the lower end of the water inlet pipe is divided into three connecting ports corresponding to three independent spaces, and a No. 2 electric gate valve is installed on each of the three connecting ports.

[0010] Preferably, a water pump is installed at one end of the clean water pipeline located inside the reuse water pool, and the clean water is pumped to the water-sealed flue gas tank through the water pump.

[0011] Preferably, a No. 4 manual valve is installed at one end of the reflux pipe close to the backwash pipe.

[0012] Preferably, the bottom of the drain trough is made of a filter screen to ensure that most of the water in the sludge discharged from the sedimentation tank can be drained out. Beneficial Effects

[0013] The present invention provides a method for removing mud from the water body of a coke oven dust removal water seal flue gas tank. It has the following beneficial effects: The present invention provides a method for removing mud from the water body of a coke oven dust removal water seal flue gas tank, which can avoid labor waste and environmental pollution caused by manual mud digging and transportation, improve the utilization efficiency of recycled water, and ensure that the flue gas water seal tank can operate stably and continuously at low cost.

[0014] The desludging scheme carried out by this method does not require specific production equipment, simplifies the operation process of water seal water desludging, reduces the difficulty of desludging, improves the desludging efficiency, and avoids the failure of the flue gas water seal tank. It not only has stable operation effect, low investment, but also simple maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the process of the present invention; Figure 2 It is a schematic diagram of the framework flow of the present invention; Figure 3 It is a schematic diagram of the process structure of the present invention; Figure 4 It is a schematic diagram of the overall structure of the present invention; Figure 5 It is a schematic diagram of the external reinforcement structure of the present invention; Figure 6 It is another schematic diagram of the external reinforcement structure of the present invention; Figure 7 It is a schematic diagram of the internal reinforcement structure of the present invention; Figure 8 It is a schematic diagram of the structure of the drain tank of the present invention; Fig. 9 This is a front schematic diagram of the cable routing in the device of the present invention; Fig.10 This is a schematic diagram of the back structure of the cable routing in the device of the present invention; Fig.11 A schematic top view of the cable routing in the device of the present invention; Fig.12 Another schematic top view of the cable routing in the device of the present invention. DETAILED DESCRIPTION

[0016] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. Example

[0017] like Figure 1-12 As shown, the embodiment of the present invention provides a method for removing mud from a water body in a coke oven dust removal water seal flue gas tank, which is characterized in that it specifically includes the following steps: Step 1. First, a reuse water pool is set up, and a sedimentation tank is added outside the reuse water pool. A reflux tank is set at the bottom of the sedimentation tank, and the reflux tank and the reuse water pool are connected by a clean water reflux pipe; Step 2. Install an accident overflow pipe on one side of the upper end of the sedimentation tank, and divide the sedimentation tank into three independent spaces of the same size in the horizontal direction. A funnel-shaped mud bucket is installed in the middle of the three independent spaces, and a No. 1 electric gate valve is set at the discharge port at the lower end of the mud bucket. A drain trough is placed at the lower end of the mud bucket in the three independent spaces and faces the lower end of the No. 1 electric gate valve; Step 3. A flue gas water seal tank is arranged at the upper end of the reuse water tank and the sedimentation tank, and a backwash pipe is arranged at the lower end of the flue gas water seal tank. The backwash pipe is connected to the reuse water tank and the sedimentation tank through a reflux pipe, and five clean water ports are arranged at the upper end of the backwash pipe. The clean water ports are arranged horizontally inside the flue gas water seal tank; The flue gas water seal tank is connected to three independent spaces inside the sedimentation tank through a water inlet pipe, and the reuse water pool is connected to the flue gas water seal tank by a clean water pipe, and the clean water pipe is connected to the backwash pipe.

[0018] Specifically, the original water inlet pipe of the reuse water pool is changed to the sedimentation tank. The sedimentation tank is divided into 3 independent boxes. Each box can realize independent water inlet and drainage, and can also realize automatic sewage overflow to fill the next box. After the sewage enters the sedimentation tank, it will be precipitated in the tank for 3-5 hours. The lower part of the sedimentation tank is equipped with a mud bucket and a No. 1 electric gate valve to centrally process and collect the precipitated impurities; and an emergency pipe is reserved at the top of the sedimentation tank to avoid overflowing water in the box. Three non-fixed drain troughs are added at the lower part of the mud bucket. The sludge in the mud bucket is discharged into the drain trough for draining. The drained water flows back to the reuse water pool through the return water trough. The drain trough is regularly transported to the production line by a forklift for reuse; At the same time, a total of 5 clean water outlets are designed, each of which is equipped with a reserved pipe opening to facilitate the use of a water pump to clean the water-sealed flue gas tank later.

[0019] Reference Figure 1 and Figure 3 A slag poking hole is arranged at the upper end of one side of the outer wall of the mud bucket, and a back-blowing hole is arranged at the lower end of the side of the outer wall of the mud bucket away from the slag poking hole. Liquid level gauges are installed on one side of the upper end of the mud bucket inside the three independent spaces. The upper end of the mud bucket among the three independent spaces is a clarified liquid area, while the inside of the mud bucket and the lower end of the mud bucket are impurity areas, and the horizontal line of the upper surface of the mud bucket is used as a dividing line. A clear liquid discharge pipe is installed at the dividing line, and the lower end of the clear liquid discharge pipe is located at the bottom end of one side of the drain tank; Specifically, the slag poking hole and back-blowing hole at the upper end can assist in cleaning and dredging the inside of the mud bucket; the design of the liquid level meter can detect the internal water level; at the same time, a clean water discharge pipe is led out from the upper mouth of the mud bucket to the reuse water pool to discharge the upper clear liquid after the mud and water in the sedimentation tank are settled.

[0020] Reference Figure 1 and Figure 3, two No. 1 manual valves are arranged on the backwash pipe, one of which is close to the return pipe, and the other is located at the tail end of the flue gas water seal tank. No. 2 manual valves are installed at the five clean water outlets, and one side of the three clean water outlets located in the middle of the five clean water outlets is still equipped with a flushing port and a No. 3 manual valve is installed on the flushing port. The lower end of the water inlet pipe is divided into three connecting ports corresponding to three independent spaces, and No. 2 electric gate valves are installed on the three connecting ports. A water pump is installed at one end of the clean water pipe located inside the reuse water tank, and the water is pumped to the water seal flue gas tank through the water pump. A No. 4 manual valve is installed at one end of the return pipe close to the backwash pipe; Specifically, in order to solve the problem that the water-sealed flue gas trough is too long, sludge is easily deposited from the middle to the rear section of the trough and is difficult to clean, a clean water pipe is led from the reuse water tank to the water-sealed flue gas trough, and the treated clear liquid is pumped into the water-sealed flue gas trough through a water pump to replenish water while impacting the sludge at the bottom so that the sludge can be discharged normally through the sludge pipe.

[0021] Reference Figure 1 and Figure 8 The bottom of the drain trough is made of a filter screen to ensure that most of the water in the sludge discharged from the sedimentation tank can be drained out to avoid a large amount of sewage flowing out during the transportation process. When the lower filter screen is draining, the drained water falls into the return water trough at the lower end, flows back to the reuse water pool through the return water trough, and the drain trough can be regularly transported to the production line by a forklift for reuse.

[0022] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A method for removing mud from a water body in a coke oven dust removal water seal flue gas tank, characterized in that: The specific steps include: Step 1. First, a reuse water pool is set up, and a sedimentation tank is added outside the reuse water pool. A reflux tank is set at the bottom of the sedimentation tank, and the reflux tank and the reuse water pool are connected by a clean water reflux pipe; Step 2. Install an accident overflow pipe on one side of the upper end of the sedimentation tank, and divide the sedimentation tank into three independent spaces of the same size in the horizontal direction. A funnel-shaped mud bucket is installed in the middle of the three independent spaces, and a No. 1 electric gate valve is set at the discharge port at the lower end of the mud bucket. A drain trough is placed at the lower end of the mud bucket in the three independent spaces and faces the lower end of the No. 1 electric gate valve; Step 3. A flue gas water seal tank is arranged at the upper end of the reuse water tank and the sedimentation tank, and a backwash pipe is arranged at the lower end of the flue gas water seal tank. The backwash pipe is connected to the reuse water tank and the sedimentation tank through a reflux pipe, and five clean water ports are arranged at the upper end of the backwash pipe. The clean water ports are arranged horizontally inside the flue gas water seal tank; The flue gas water seal tank is connected to three independent spaces inside the sedimentation tank through a water inlet pipe, and the reuse water pool is connected to the flue gas water seal tank by a clean water pipe, and the clean water pipe is connected to the backwash pipe.

2. The method for removing mud from the water body of a coke oven dust removal water seal flue gas tank according to claim 1, characterized in that: A slag poking hole is arranged at the upper end of one side of the outer wall of the mud bucket, and a back-blowing hole is arranged at the lower end of one side of the outer wall of the mud bucket away from the slag poking hole.

3. The method for removing mud from the water body of a coke oven dust removal water seal flue gas tank according to claim 1, characterized in that: Liquid level gauges are installed on one side of the upper end of the mud bucket inside the three independent spaces. Among the three independent spaces, the upper end of the mud bucket is the clarified liquid area, while the inside of the mud bucket and the lower end of the mud bucket are the impurity area, and the horizontal line of the upper surface of the mud bucket is used as the dividing line. A clear liquid discharge pipe is installed at the dividing line and the lower end of the clear liquid discharge pipe is located at the bottom end of one side of the drain trough.

4. The method for removing mud from the water body of a coke oven dust removal water seal flue gas tank according to claim 1, characterized in that: Two No. 1 manual valves are arranged on the backwash pipe, one of which is close to the return pipe, and the other is located at the tail end of the flue gas water seal groove. No. 2 manual valves are installed at the five clean water outlets, and one side of the three clean water outlets located in the middle of the five clean water outlets is also equipped with a flushing outlet and a No. 3 manual valve is installed on the flushing outlet.

5. The method for removing mud from the water body of a coke oven dust removal water seal flue gas tank according to claim 1, characterized in that: The lower end of the water inlet pipe is divided into three connection ports corresponding to three independent spaces, and a No. 2 electric gate valve is installed on each of the three connection ports.

6. The method for removing mud from the water body of a coke oven dust removal water seal flue gas tank according to claim 1, characterized in that: A water pump is installed at one end of the clean water pipeline located inside the reuse water pool, and the clean water is pumped to the water-sealed flue gas tank through the water pump.

7. The method for removing mud from the water body of a coke oven dust removal water seal flue gas tank according to claim 1, characterized in that: A No. 4 manual valve is installed at one end of the return pipe close to the backwash pipe.

8. The method for removing mud from the water body of a coke oven dust removal water seal flue gas tank according to claim 1, characterized in that: The bottom of the drain trough is made of a filter screen to ensure that most of the water in the sludge discharged from the sedimentation tank can be drained out.

Images