System for reducing tar content of condensate tank

Abstract

The utility model discloses a system for reducing tar content of a condensate tank, which comprises a primary cooler and the condensate tank, a partition plate and an inclined baffle plate are arranged in the condensate tank, the inside of the condensate tank is divided into a settling area and a water passing area by the partition plate, the inclined baffle plate is arranged above the water passing area, and the other end of the inclined baffle plate obliquely downwards exceeds the top of the partition plate. A mixed liquid inlet and a liquid supplementing opening are formed in the top of the condensate tank, the mixed liquid inlet is formed above the settling area, and the liquid supplementing opening is formed above the inclined baffle; a probe of the liquid viscosity sensor is arranged in the water passing area; an external ammonia water pipe is connected to the liquid supplementing opening, an electric control valve is arranged on the external ammonia water pipe, the signal output end of the liquid viscosity sensor is connected with the signal input end of the DCS controller, and the DCS controller is electrically connected with the electric control valve. The device has the advantages that by arranging the liquid viscosity sensor in the condensate tank, the viscosity of the mixed liquid is monitored, ammonia water can be timely controlled to enter, the mixed liquid is diluted, the tar content ratio is reduced, and the viscosity is adjusted.

Description

Technical field:

[0001] The utility model relates to the field of purification, in particular to a system for reducing the tar content of a condensate tank. Background technology:

[0002] In the treatment of coking raw coal gas, the temperature of the coal gas drops to 18-22°C after being cooled in the primary cooler (primary cooling tower). During this period, naphthalene is removed by spraying ammonia water and light tar mixture. Usually, since the coal gas contains tar, spraying can condense the tar, resulting in an increase in the tar content. Therefore, only ammonia water is used for spraying. The ammonia water and tar mixture after spraying is collected in a condensate tank. After precipitation, ammonia water is continued to be used for spraying. As production continues, the tar content in the condensate tank is also increasing, causing the mixture in the condensate tank to be more viscous and have poor fluidity. At the same time, the increase in the proportion of ammonia water has a greater impact on naphthalene removal. Some naphthalene that has not been thoroughly cleaned out in the primary cooler enters the electrostatic precipitator with the coal gas, and is crystallized by the lowering of the temperature and mixed with the tar in the electrostatic precipitator, and attached to the electrostatic precipitator honeycomb plate or corona wire. Discharge is generated under the action of the high-voltage magnetic field, resulting in fluctuations in the electrostatic precipitator voltage and current, affecting the tar removal effect. Utility model content:

[0003] The utility model aims to provide a system for reducing the tar content of a condensate tank.

[0004] The utility model is implemented by the following technical solutions:

[0005] A system for reducing the tar content of a condensate tank, comprising a primary cooler, a condensate tank, a DCS controller, an external ammonia pipe, an electric control valve, and a liquid viscosity sensor, wherein a partition and an inclined baffle are arranged inside the condensate tank, the side and bottom of the partition are respectively fixed to the inner wall of the condensate tank, the interior of the condensate tank is divided into a sedimentation area and a water flow area by the partition, the inclined baffle is arranged above the water flow area, the side and one end of the inclined baffle are respectively fixed to the inner wall of the condensate tank, the other end of the inclined baffle is obliquely downward and exceeds the top of the partition, the top of the condensate tank is provided with a mixed liquid inlet and a liquid replenishing port, the mixed liquid inlet is arranged above the sedimentation area, and the liquid replenishing port is arranged above the inclined baffle;

[0006] The probe of the liquid viscosity sensor is arranged in the water flow area and placed between the inclined baffle and the top of the partition;

[0007] A mixed liquid outlet is provided at the bottom of the water flow area;

[0008] The external ammonia water pipe is connected to the liquid replenishing port, the electric control valve is arranged on the external ammonia water pipe, the signal output end of the liquid viscosity sensor is connected to the signal input end of the DCS controller, and the DCS controller is electrically connected to the electric control valve.

[0009] Preferably, it also includes a flow meter and an audible and visual alarm, wherein the flow meter is arranged at the mixed liquid outlet, and the DCS controller is electrically connected to the audible and visual alarm.

[0010] Advantages of the utility model: The utility model provides a liquid viscosity sensor in the condensate tank to monitor the viscosity of the mixed liquid, thereby timely controlling the entry of ammonia water, diluting the mixed liquid, reducing the tar content, and adjusting the viscosity. Description of the drawings:

[0011] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0012] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0013] Figure 2 It is a schematic diagram of the condensate tank structure.

[0014] In the figure: primary cooler 1, condensate tank 2, partition 3, inclined baffle 4, sedimentation area 5, water flow area 6, mixed liquid inlet 7, liquid replenishing port 8, liquid viscosity sensor 9, external ammonia pipe 10, electric control valve 11, DCS controller 12, mixed liquid outlet 13, flow meter 14, sound and light alarm 15. Specific implementation method:

[0015] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0016] like Figure 1 , Figure 2As shown, a system for reducing the tar content of a condensate tank comprises a primary cooler 1, a condensate tank 2, a DCS controller 12, an external ammonia pipe 10, an electric control valve 11, and a liquid viscosity sensor 9. The interior of the condensate tank 2 is provided with a partition 3 and an inclined baffle 4. The side and bottom of the partition 3 are respectively fixed to the inner wall of the condensate tank 2. The interior of the condensate tank 2 is divided into a sedimentation area 5 and a water flow area 6 by the partition 3. The inclined baffle 4 is arranged above the water flow area 6. The side and one end of the inclined baffle 4 are respectively fixed to the inner wall of the condensate tank 2. The condensate tank 2 is fixed on the inner wall, and the other end of the inclined baffle 4 is inclined downward and exceeds the top of the partition 3. The top of the condensate tank 2 is provided with a mixed liquid inlet 7 and a liquid replenishing port 8. The mixed liquid inlet 7 is placed above the sedimentation area 5. The mixed liquid inlet 7 is connected to the mixed liquid discharge pipe after the spraying of the primary cooler 1. The mixed liquid flows into the sedimentation area 5 through the mixed liquid inlet 7 and settles in the sedimentation area 5. The tar and other substances are partially settled, and the rest overflows from the top of the partition 3 into the water flow area 6. The liquid replenishing port 8 is placed above the inclined baffle 4.

[0017] The probe of the liquid viscosity sensor 9 is arranged in the water flow area 6 and placed between the inclined baffle 4 and the top of the partition 3. The clarified mixed liquid overflowing into the water flow area 6 is sensed by the probe of the liquid viscosity sensor 9 during the process of remaining;

[0018] A mixed liquid outlet 13 is provided at the bottom of the water flow area 6, and the mixed liquid outlet 13 is connected to a water pump to circulate the clarified mixed liquid in the water flow area 6 back to the spraying;

[0019] An external ammonia water pipe 10 is connected to the liquid replenishing port 8, an electric control valve 11 is arranged on the external ammonia water pipe 10, a signal output end of the liquid viscosity sensor 9 is connected to a signal input end of a DCS controller 12, the DCS controller 12 is electrically connected to the electric control valve 11, a liquid viscosity value is preset, the liquid viscosity sensor 9 senses the liquid viscosity and sends a signal to the DCS controller 12, when the preset value is exceeded, the electric control valve 11 is controlled to open, and pure ammonia water is introduced into the external ammonia water pipe 10, and enters the sedimentation area 5 along the inclined baffle 4, diluting the mixed liquid, reducing the tar content ratio, and adjusting the viscosity.

[0020] It also includes a flow meter 14 and an audible and visual alarm 15. The flow meter 14 is arranged at the mixed liquid outlet 13. The DCS controller 12 is electrically connected to the audible and visual alarm 15. The flow meter 14 monitors the flow rate of the clarified mixed liquid discharged from the mixed liquid outlet 13. When the flow rate slows down and is lower than the preset value, it indicates that the viscosity increases, and also indicates that the liquid viscosity sensor 9 may be damaged and needs to be repaired in time. A signal is sent to the DCS controller 12, and the audible and visual alarm 15 alarms.

[0021] Working principle: When the utility model is in use, the mixed liquid flows into the sedimentation area 5 through the mixed liquid inlet 7 and settles in the sedimentation area 5. Tar and other substances are partially settled, and the rest overflows from the top of the partition 3 into the water flow area 6. During the overflow process, it is sensed by the probe of the liquid viscosity sensor 9. The liquid viscosity sensor 9 senses the liquid viscosity and sends a signal to the DCS controller 12. When it exceeds the preset value, the electric control valve 11 is controlled to open, and pure ammonia water is passed into the external ammonia pipe 10 to dilute the mixed liquid.

[0022] The present application provides a liquid viscosity sensor 9 in the condensate tank 2 to monitor the viscosity of the mixed liquid, thereby timely controlling the entry of ammonia water, diluting the mixed liquid, reducing the tar content, and adjusting the viscosity.

[0023] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A system for reducing the tar content in a condensate tank, comprising a primary cooler and a condensate tank, characterized in that: It also includes a DCS controller, an external ammonia pipe, an electric control valve, and a liquid viscosity sensor. The condensate tank is provided with a partition and an inclined baffle inside. The side and bottom of the partition are respectively fixed to the inner wall of the condensate tank. The interior of the condensate tank is divided into a sedimentation area and a water flow area by the partition. The inclined baffle is arranged above the water flow area. The side and one end of the inclined baffle are respectively fixed to the inner wall of the condensate tank. The other end of the inclined baffle is obliquely downward and exceeds the top of the partition. The top of the condensate tank is provided with a mixed liquid inlet and a liquid replenishing port. The mixed liquid inlet is placed above the sedimentation area, and the liquid replenishing port is placed above the inclined baffle. The probe of the liquid viscosity sensor is arranged in the water flow area and placed between the inclined baffle and the top of the partition; A mixed liquid outlet is provided at the bottom of the water flow area; The external ammonia water pipe is connected to the liquid replenishing port, the electric control valve is arranged on the external ammonia water pipe, the signal output end of the liquid viscosity sensor is connected to the signal input end of the DCS controller, and the DCS controller is electrically connected to the electric control valve.

2. A system for reducing tar content in a condensate tank according to claim 1, characterized in that: It also includes a flow meter and an audible and visual alarm. The flow meter is arranged at the mixed liquid outlet, and the DCS controller is electrically connected to the audible and visual alarm.

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