Residual ammonia water deoiling device

Abstract

The utility model provides a residual ammonia water deoiling device, which relates to the technical field of residual ammonia water deoiling, and comprises at least two residual ammonia water tanks, and an outflow pipeline is arranged at the lower end of each residual ammonia water tank; the extension pipeline is arranged in the residual ammonia water tank, one end of the extension pipeline is connected with the outflow pipeline, and the other end of the extension pipeline extends upwards; the two ends of the communicating pipeline are connected to the upper ends of the residual ammonia water tanks respectively, so that the two residual ammonia water tanks are communicated; the problems that in the prior art, the residual ammonia water deoiling effect is limited, and an ammonia still is prone to being blocked are solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of excess ammonia water deoiling, and more specifically relates to a excess ammonia water deoiling device. Background Art

[0002] In the process of coke production, when the external water content of the mixed coal reaches between 8.1% and 9.9%, about 12% of ammonia water will be produced. The treatment of ammonia water is an important problem in the coking industry and an indispensable part of the coking industry. Usually, ammonia water is pretreated through an ammonia evaporator, and ammonia gas enters the saturator to produce ammonium sulfate.

[0003] The ammonia produced by coking will flow into the gas-liquid separator along with the raw coal gas and flow to the mechanized ammonia clarification tank. The tar-ammonia mixture condensed from the horizontal tube primary cooler, electric tar collector, gas blower and other gas equipment will also enter the mechanized ammonia clarification tank. The tar, ammonia and tar residue are separated according to the sedimentation principle of the coarse suspension. The separated circulating ammonia enters the gas collecting pipe of the coke oven for recycling, and the remaining ammonia is processed and enters the next step.

[0004] The remaining ammonia water is stored in the remaining ammonia water tank and will be pumped to the ammonia evaporation tower for deep treatment. After the remaining ammonia water is degreased by standing, it generally still contains a small amount of light tar (0.5g / L). During the ammonia evaporation process, the tar in the remaining ammonia water is deposited on the tray and heat exchanger of the ammonia evaporation tower, causing the heat exchanger to be blocked and the efficiency of the ammonia evaporation tower to decrease. In the normal production process, the heat exchanger and the ammonia evaporation tower need to be disassembled frequently for degreasing operations, which not only wastes a lot of time, but also causes a lot of manpower, material resources, and financial resources. Therefore, reducing the tar in the remaining ammonia water is the key to ensuring smooth production.

[0005] Take a steel mill as an example. Figure 1 As shown, there are two parallel-arranged residual ammonia tanks 1, with a tank body diameter of 7.7 meters, a height of 11.105 meters, and a volume of 450m 3, the circulating ammonia water tank 1 uses the remaining ammonia water to enter the two parallel residual ammonia water tanks 1. After the remaining ammonia water is left in the residual ammonia water tank 1 for a certain period of time, it is transported to the ammonia evaporation tower 2 through the residual ammonia water pump for ammonia evaporation. As the production progresses, it is found that the ammonia water heat exchanger and the ammonia evaporation tower 2 are frequently blocked, the ammonia water temperature continues to rise, and the temperature of the ammonia evaporation tower 2 fluctuates. When the residual ammonia water is tested, light tar is found in the residual ammonia water; the blockages in the ammonia evaporation tower 2 and the heat exchanger are tested and detected. The blockages are black in color with a bright luster, and the toluene-insoluble substances in them are about 1.03%; comprehensive material property analysis shows that the main substances that block the ammonia evaporation tower 2 are tar, asphalt and residual coal powder. The reason for the blockage of the ammonia evaporation tower 2 is the low oil removal efficiency of the residual ammonia water. The light tar remaining in the residual ammonia water accumulates on the pores of the ammonia evaporation tower 2 plate and in the ammonia water heat exchanger flow channel, resulting in the paralysis of the ammonia evaporation tower 2. To solve the problem of frequent blockage of ammonia distillation tower 2, we must first reduce the oil content of the remaining ammonia water. Utility Model Content

[0006] The utility model aims to provide a residual ammonia water deoiling device in view of the deficiencies in the prior art, so as to solve the problems that the residual ammonia water deoiling effect is limited and the ammonia evaporation tower is easily blocked in the prior art.

[0007] In order to achieve the above object, the utility model provides a residual ammonia water deoiling device, comprising:

[0008] At least two residual ammonia water tanks, each of which has an outflow pipe at its lower end;

[0009] An extension pipe, wherein the extension pipe is arranged inside the residual ammonia water tank, one end of the extension pipe is connected to the outflow pipe, and the other end of the extension pipe extends upward;

[0010] A connecting pipe, both ends of which are respectively connected to the upper end of one of the remaining ammonia water tanks to connect the two remaining ammonia water tanks.

[0011] Optionally, two residual ammonia water tanks are provided.

[0012] Optionally, the vertical height of the extension pipeline is at least 1 m.

[0013] Optionally, the extension pipe includes a vertical straight pipe and an elbow pipe, and the vertical straight pipe is connected to the outflow pipe through the elbow pipe.

[0014] Optionally, the distance between the connecting pipe and the bottom of the residual ammonia water tank is at least 10.5 m.

[0015] Optionally, a first valve is provided on the communicating pipe.

[0016] Optionally, it further comprises a delivery pipeline, wherein the delivery pipeline is connected to the ammonia distillation equipment, and the outflow pipe of each of the residual ammonia water tanks is connected to the delivery pipeline.

[0017] Optionally, the delivery pipeline is connected to the ammonia distillation equipment through a filter.

[0018] Optionally, the filter comprises a shell, a filter filler is arranged inside the shell, an inlet pipe and an outlet pipe are respectively arranged at the lower end and the upper end of the shell, the delivery pipeline is connected to the inlet pipe, and the outlet pipe is connected to the ammonia distillation equipment.

[0019] Optionally, a second valve is provided at the bottom of the shell, and a manhole is provided at the upper part and the lower part of the shell respectively.

[0020] The utility model provides a residual ammonia water oil removal device, which has the beneficial effects of: the residual ammonia water oil removal device is provided with an extension pipe inside the residual ammonia water pipe, the inlet of the outflow pipe of the residual ammonia water pipe is moved upward, the height of the ammonia water outflow position of the residual ammonia water tank is increased, and based on the sedimentation principle, the ammonia water flows out from a higher position, which can reduce the content of light tar in the ammonia water; at the same time, the setting of the connecting pipe enables the two residual ammonia water tanks to form a series arrangement, when the liquid level in the first residual ammonia water tank reaches the setting height of the connecting pipe, the residual ammonia water will flow into the second residual ammonia water tank through the connecting pipe, after standing still, the outflow pipe of the first residual ammonia water tank is closed, and the outflow pipe of the second residual ammonia water tank is opened, so that the residual ammonia water can be discharged, and this process greatly increases the standing time of the residual ammonia water, and also based on the sedimentation principle, the tar content in the outflowing residual ammonia water can be reduced, providing a guarantee for the stable operation of the ammonia evaporation tower.

[0021] Other features and advantages of the present invention will be described in detail in the subsequent specific implementation section. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The above and other objects, features and advantages of the present invention will become more apparent through a more detailed description of exemplary embodiments of the present invention in conjunction with the accompanying drawings, wherein the same reference numerals generally represent the same components in the exemplary embodiments of the present invention.

[0023] Figure 1 The present invention shows a schematic diagram of the connection structure of a parallel arrangement of a residual ammonia water tank and an ammonia distillation tower in the prior art.

[0024] Figure 2 A schematic structural diagram of a residual ammonia water oil removal device according to an embodiment of the utility model is shown.

[0025] Description of reference numerals:

[0026] 1. Residual ammonia water tank; 2. Ammonia evaporation tower; 3. Outflow pipe; 4. Extension pipe; 5. Connecting pipe; 6. First valve; 7. Delivery pipeline; 8. Filter. DETAILED DESCRIPTION

[0027] The preferred embodiments of the present invention will be described in more detail below. Although the preferred embodiments of the present invention are described below, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to make the present invention more thorough and complete, and to fully convey the scope of the present invention to those skilled in the art.

[0028] like Figure 2 As shown, the utility model provides a residual ammonia water deoiling device, comprising:

[0029] At least two residual ammonia water tanks 1, each residual ammonia water tank 1 is provided with an outflow pipe 3 at the lower end;

[0030] An extension pipe 4 is arranged inside the residual ammonia water tank 1, one end of the extension pipe 4 is connected to the outflow pipe 3, and the other end of the extension pipe 4 extends upward;

[0031] A connecting pipe 5 , both ends of which are respectively connected to the upper end of a residual ammonia water tank 1 , so as to connect the two residual ammonia water tanks 1 .

[0032] Specifically, in order to solve the problem that the residual ammonia water degreasing effect is limited and the ammonia evaporation tower 2 is easily blocked in the prior art, the residual ammonia water degreasing device provided by the utility model is provided with an extension pipe 4 inside the residual ammonia water pipe, and the inlet of the outflow pipe 3 of the residual ammonia water pipe is moved upward to increase the height of the ammonia water outflow position of the residual ammonia water tank 1. Based on the sedimentation principle, the ammonia water flows out from a higher position, which can reduce the light tar content in the ammonia water. At the same time, the setting of the connecting pipe 5 enables the two residual ammonia water tanks 1 to form a series arrangement. When the liquid level in the first residual ammonia water tank 1 reaches the setting height of the connecting pipe 5, the residual ammonia water will flow into the second residual ammonia water tank 1 through the connecting pipe 5. After standing, the outflow pipe 3 of the first residual ammonia water tank 1 is closed, and the outflow pipe 3 of the second residual ammonia water tank 1 is opened, so that the residual ammonia water can be discharged. This process greatly increases the standing time of the residual ammonia water. Based on the sedimentation principle, the tar content in the outflowing residual ammonia water can be reduced, which provides a guarantee for the stable operation of the ammonia evaporation tower 2.

[0033] In this embodiment, two residual ammonia water tanks 1 are provided.

[0034] Optionally, the vertical height of the extension pipe 4 is at least 1 m.

[0035] In this embodiment, the extended pipe 4 is arranged to raise the inlet and outlet position of the remaining ammonia water by 1 m.

[0036] Optionally, the extension pipe 4 includes a vertical straight pipe and an elbow pipe, and the vertical straight pipe is connected to the outflow pipe 3 through the elbow pipe.

[0037] Specifically, Figure 2 As shown, the elbow pipe connects the vertical straight pipe in the residual ammonia water tank 1 along the vertical direction.

[0038] Optionally, the distance between the connecting pipe 5 and the bottom of the remaining ammonia water tank 1 is at least 10.5 m.

[0039] In this embodiment, two residual ammonia water tanks 1 are placed at the same height, and are connected to each other via a horizontally arranged connecting pipe 5 10.5 m above the tank bottom.

[0040] Optionally, a first valve 6 is provided on the connecting pipe 5 .

[0041] Specifically, the first valve 6 may be a gate valve.

[0042] Optionally, a delivery pipeline 7 is further included, the delivery pipeline 7 is connected to the ammonia distillation equipment, and the outflow pipe 3 of each residual ammonia water tank 1 is connected to the delivery pipeline 7 .

[0043] Specifically, the outflow pipe 3 of each residual ammonia water tank 1 is connected to the same delivery pipeline 7, and the residual ammonia water is discharged to the ammonia distillation equipment through the delivery pipeline 7.

[0044] In this embodiment, the ammonia distillation equipment is an ammonia distillation tower 2.

[0045] Optionally, the delivery pipeline 7 is connected to the ammonia distillation equipment through a filter 8 .

[0046] Specifically, the filter 8 can filter the remaining ammonia water before it enters the ammonia distillation equipment, thereby further removing the tar in the remaining ammonia water.

[0047] Optionally, the filter 8 comprises a shell, a filter filler is arranged inside the shell, an inlet pipe and an outlet pipe are respectively arranged at the lower end and the upper end of the shell, the delivery pipeline 7 is connected to the inlet pipe, and the outlet pipe is connected to the ammonia distillation equipment.

[0048] Specifically, the remaining ammonia water enters the shell from the lower end of the shell, is filtered by the filter filler, flows out from the upper end of the shell, and enters the ammonia distillation device, thereby achieving tar filtration before entering the ammonia distillation device.

[0049] In this embodiment, the filter filler is lump coke, and the diameter of the lump coke is about 10 cm; if the diameter of the coke is too large, the adsorption area of ​​the coke will be reduced, affecting the adsorption efficiency of the coke. If the diameter of the coke is too small, the filter 8 will be blocked, affecting the stable operation of the residual ammonia water oil removal device.

[0050] Optionally, a second valve is provided at the bottom of the shell, and a manhole is provided at the upper part and the lower part of the shell respectively.

[0051] Specifically, the second valve is a vent valve, and the upper and lower two manholes are used for taking out and placing lump coke and for convenient maintenance.

[0052] The various embodiments of the utility model have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes are obvious to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments.

Claims

1. A residual ammonia water deoiling device, characterized in that: include: At least two residual ammonia water tanks, each of which has an outflow pipe at its lower end; An extension pipe, wherein the extension pipe is arranged inside the residual ammonia water tank, one end of the extension pipe is connected to the outflow pipe, and the other end of the extension pipe extends upward; A connecting pipe, both ends of which are respectively connected to the upper end of one of the remaining ammonia water tanks to connect the two remaining ammonia water tanks.

2. The excess ammonia water deoiling device according to claim 1, characterized in that: There are two remaining ammonia water tanks.

3. The excess ammonia water deoiling device according to claim 1, characterized in that: The vertical height of the extension pipeline is at least 1 m.

4. The excess ammonia water deoiling device according to claim 1, characterized in that: The extended pipeline includes a vertical straight pipe and an elbow pipe, and the vertical straight pipe is connected to the outflow pipeline through the elbow pipe.

5. The excess ammonia water deoiling device according to claim 1, characterized in that: The distance between the communicating pipe and the bottom of the residual ammonia water tank is at least 10.5 m.

6. The excess ammonia water deoiling device according to claim 1, characterized in that: The communicating pipe is provided with a first valve.

7. The excess ammonia water deoiling device according to claim 1, characterized in that: It also includes a delivery pipeline, which is connected to the ammonia distillation equipment, and the outflow pipe of each of the remaining ammonia water tanks is connected to the delivery pipeline.

8. The excess ammonia water deoiling device according to claim 7, characterized in that: The delivery pipeline is connected to the ammonia distillation equipment through a filter.

9. The excess ammonia water deoiling device according to claim 8, characterized in that: The filter comprises a shell, a filter filler is arranged inside the shell, an inlet pipe and an outlet pipe are respectively arranged at the lower end and the upper end of the shell, the delivery pipeline is connected to the inlet pipe, and the outlet pipe is connected to the ammonia distillation equipment.

10. The excess ammonia water deoiling device according to claim 9, characterized in that: A second valve is arranged at the bottom of the shell, and a manhole is arranged at the upper part and the lower part of the shell respectively.

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