Steam condensate recycling system for semi-coke wastewater treatment

Abstract

A steam condensate recycling system for semi-coke wastewater treatment is characterized in that a liquid inlet of a medium-pressure condensate tank is connected with a condensate output pipe of an ammonia rectification reboiler, a condensate output pipe of a phenol tower reboiler, a condensate output pipe of a deamination tower reboiler and a condensate output pipe of a water tower reboiler; a gas outlet of the medium-pressure condensate tank is connected with a steam input pipe of a deamination tower reboiler, and a liquid outlet of the medium-pressure condensate tank is connected with a liquid inlet of the low-pressure condensate tank; a liquid inlet of the low-pressure condensate tank is connected with a flash steam condensate output pipe of a reboiler of the deamination tower and a condensate output pipe of the crude phenol tank, a steam output port and a steam condensate inlet are connected with a steam condenser, and a low-pressure condensate output port is connected with a condensate output header pipe; a low-temperature condensate output port is connected with a first desuperheater liquid inlet I and a second desuperheater liquid inlet I in parallel, a first desuperheater liquid inlet II is connected with a high-pressure steam pipe, a first desuperheater liquid outlet and a second desuperheater liquid inlet II are connected with a phenol tower reboiler liquid inlet pipe in parallel, and a second desuperheater liquid outlet is connected with a water tower reboiler liquid inlet pipe.

Description

TECHNICAL FIELD

[0001] The utility model belongs to heat exchange equipment technical field, specifically related to a kind of steam condensate recycling system for semi coke wastewater treatment. BACKGROUND

[0002] A large amount of wastewater containing complex components and high pollutants is generated during semi coke production, and a large amount of energy is usually consumed to treat these wastewater. In the wastewater treatment process, steam heating is one of the commonly used methods, but the condensate formed after steam condensation in the traditional semi coke wastewater treatment system is usually directly discharged or discharged after simple treatment, which not only wastes valuable water resources, but also may cause secondary pollution. Therefore, there is an urgent need to improve the existing semi coke wastewater treatment system, which can efficiently recover and reuse these steam condensate. SUMMARY

[0003] The technical problem to be solved by the utility model is to overcome the shortcomings of the prior art, and to provide a steam condensate recycling system for semi coke wastewater treatment, which saves water resources, reduces environmental pollution and recycles heat energy.

[0004] The technical scheme adopted to solve the above technical problems is: a steam condensate recycling system for semi coke wastewater treatment, the liquid inlet a4, a2, a1, a3 of the medium pressure condensate tank is connected with the ammonia rectification reboiler condensate output pipe, the phenol tower reboiler condensate output pipe, the deamination tower reboiler condensate output pipe and the water tower reboiler condensate output pipe respectively, the gas outlet b of the medium pressure condensate tank is connected with the deamination tower reboiler steam input pipe through the pipeline, the liquid outlet C is connected with the liquid inlet A3 of the low pressure condensate tank through the pipeline, the liquid inlet A1 of the low pressure condensate tank is connected with the deamination tower reboiler flash steam condensate output pipe, the steam output port b1 of the low pressure condensate tank is connected with the steam inlet of the steam condenser through the pipeline, the liquid output port of the steam condenser is connected with the liquid inlet b3 of the low pressure condensate tank through the pipeline, the liquid inlet b2 of the low pressure condensate tank is connected with the crude phenol tank condensate output pipe through the pipeline, the low pressure condensate output port c is connected with the condensate output main pipe through the condensate output pump group, the low temperature condensate output port d is connected with the first desuperheater liquid inlet I and the second desuperheater liquid inlet I in parallel through the desuperheater condensate pump group, the liquid inlet II of the first desuperheater is connected with the high pressure steam pipe, the liquid outlet of the first desuperheater is connected with the second desuperheater liquid inlet II and the phenol tower reboiler liquid inlet pipe in parallel, and the second desuperheater liquid outlet is connected with the water tower reboiler liquid inlet pipe.

[0005] As a preferred technical scheme, a first liquid level control valve is provided on the pipeline between the liquid outlet C and the liquid inlet A3 of the low pressure condensate tank, and a first liquid level sensor is provided on the medium pressure condensate tank, and the first liquid level sensor is electrically connected with the first liquid level control valve.

[0006] As a preferred technical scheme, the condensate output header is provided with a second liquid level controller, and the low-pressure condensate tank is provided with a second liquid level sensor, which is electrically connected with the second liquid level control valve.

[0007] As a preferred technical scheme, the gas outlet b of the medium-pressure condensate tank is connected with a low-pressure steam pipe network through a valve.

[0008] As a preferred technical scheme, a first temperature control valve is arranged on a pipeline between the desuperheating condensate pump group and the first desuperheater liquid inlet I, a first temperature sensor is arranged on the first desuperheater, and the first temperature sensor is electrically connected with the first temperature control valve.

[0009] As a preferred technical scheme, a second temperature control valve is arranged on a pipeline between the desuperheating condensate pump group and the second desuperheater liquid inlet I, a second temperature sensor is arranged on the second desuperheater, and the second temperature sensor is electrically connected with the second temperature control valve.

[0010] As a preferred technical scheme, a pressure control valve is arranged on a cooling water return pipeline of the steam condenser, and a pressure sensor is arranged on the low-pressure condensate tank, and the pressure sensor is electrically connected with the pressure control valve.

[0011] The utility model discloses the beneficial effect is as follows:

[0012] The utility model discloses through recycling and recycling steam condensate, avoids the pollution caused to the environment directly discharging, effectively saves water resources, reduces the waste water treatment cost, through the collection and processing of condensate, realizes the recycling of heat energy, and the recycling heat energy is used in other need heat energy's craft, further improves energy utilization efficiency.

[0013] The utility model discloses simple structure, convenient operation, and easily promotes and applies in industrial sites such as semi coke waste water treatment plant. ACCURACY OF DRAWINGS

[0014] Figure 1 It is the structure schematic diagram of the utility model.

[0015] Figure 2 It is the structure schematic diagram of the medium-pressure condensate tank 5 in the utility model.

[0016] Figure 3 It is the structure schematic diagram of the low-pressure condensate tank 27 in the utility model.

[0017] Wherein: water tower reboiler condensate output pipe 1, deamination tower reboiler condensate output pipe 2, phenol tower reboiler condensate output pipe 3, ammonia rectification reboiler condensate output pipe 4, medium pressure condensate tank 5, first liquid level sensor 6, first liquid level control valve 7, steam condenser 8, pressure control valve 9, deamination tower reboiler steam input pipe 10, low pressure steam pipe network 11, crude phenol tank condensate output pipe 12, second liquid level sensor 13, second liquid level controller 14, condensate output main pipe 15, water tower reboiler liquid inlet pipe 16, condensate output pump set 18, desuperheating condensate pump set 19, second temperature sensor 20, second desuperheater 21, first desuperheater 22, first temperature sensor 23, first temperature control valve 24, second temperature control valve 25, deamination tower reboiler flash steam condensate output pipe 26, low pressure condensate tank 27, pressure sensor 28. DETAILED DESCRIPTION

[0018] The utility model is further explained in detail below in combination with the drawings and examples, but the utility model is not limited to the following implementation manners.

[0019] In Figure 1 The steam condensate recycling system for semi-coke wastewater treatment of the embodiment is characterized in that: the liquid inlets a4, a2, a1 and a3 of the medium pressure condensate tank 5 are connected with the ammonia rectification reboiler condensate output pipe 4, the phenol tower reboiler condensate output pipe 3, the deamination tower reboiler condensate output pipe 2 and the water tower reboiler condensate output pipe 1 respectively, the gas outlet b of the medium pressure condensate tank 5 is connected with the deamination tower reboiler steam input pipe 10 through a pipeline, the liquid outlet C is connected with the liquid inlet A3 of the low pressure condensate tank 27 through a pipeline, the liquid inlet A1 of the low pressure condensate tank 27 is connected with the deamination tower reboiler flash steam condensate output pipe 26, the steam output port b1 of the low pressure condensate tank 27 is connected with the steam inlet of the steam condenser 8 through a pipeline, the liquid output port of the steam condenser 8 is connected with the liquid inlet b3 of the low pressure condensate tank 27 through a pipeline, the liquid inlet b2 of the low pressure condensate tank 27 is connected with the crude phenol tank condensate output pipe 12 through a pipeline, the low pressure condensate output port c is connected with the condensate output main pipe 15 through the condensate output pump set 18, the low temperature condensate output port d is connected with the liquid inlets I of the first desuperheater 22 and the second desuperheater 21 in parallel through the desuperheating condensate pump set 19, the liquid inlet II of the first desuperheater 22 is connected with the high pressure steam pipe, the liquid outlet of the first desuperheater 22 is connected with the liquid inlets II of the second desuperheater 21 and the liquid inlet pipe of the phenol tower reboiler in parallel, and the liquid outlet of the second desuperheater 21 is connected with the liquid inlet pipe 16 of the water tower reboiler. The high pressure steam pipe inputs 3.8 Mpa steam into the first desuperheater 22, after mixing twice with the desuperheating condensate output by the low pressure condensate tank 27, 1.8 Mpa steam is output through the second desuperheater 21, and then enters the water tower reboiler through the liquid inlet pipe 16 of the water tower reboiler for reuse.

[0020] The first liquid level control valve 7 is installed on the pipeline between the outlet C of the medium-pressure condensate tank 5 and the inlet A3 of the low-pressure condensate tank 27, the first liquid level sensor 6 is installed on the medium-pressure condensate tank 5, and the first liquid level sensor 6 is electrically connected with the first liquid level control valve 7. The first liquid level sensor 6 collects the liquid level signal in the medium-pressure condensate tank 5, and the first liquid level control valve 7 automatically controls the opening degree based on the liquid level signal, so as to control the temperature and pressure in the medium-pressure condensate tank 5.

[0021] The second liquid level control valve 14 is installed on the condensate output header 15, the second liquid level sensor 13 is installed on the low-pressure condensate tank 27, and the second liquid level sensor 13 is electrically connected with the second liquid level control valve. The second liquid level sensor 13 collects the liquid level signal in the low-pressure condensate tank 27, and the first liquid level control valve 7 automatically controls the opening degree based on the liquid level signal, so as to control the temperature and pressure in the low-pressure condensate tank 27.

[0022] The outlet b of the medium-pressure condensate tank 5 in the embodiment is also connected with the low-pressure steam pipe network 11 through a valve, which is opened in winter to provide flash steam to the low-pressure steam pipe network 11 to keep the temperature of the low-pressure steam pipe network 11 stable.

[0023] The first temperature control valve 24 is installed on the pipeline between the desuperheating condensate pump group 19 and the inlet I of the first desuperheater 22, the first temperature sensor 23 is installed on the first desuperheater 22, and the first temperature sensor 23 is electrically connected with the first temperature control valve 24. The first temperature sensor 23 is used to collect the temperature in the first desuperheater 22 in real time, and the first temperature control valve 24 controls the opening degree in real time according to the temperature signal, so as to adjust the temperature and pressure of the first desuperheater 22.

[0024] The second temperature control valve 25 is installed on the pipeline between the desuperheating condensate pump group 19 and the inlet I of the second desuperheater 21, the second temperature sensor 20 is installed on the second desuperheater 21, and the second temperature sensor 20 is electrically connected with the second temperature control valve 25. The second temperature sensor 20 is used to collect the temperature in the second desuperheater 21 in real time, and the second temperature control valve 25 controls the opening degree in real time according to the temperature signal, so as to adjust the temperature and pressure of the second desuperheater 21.

[0025] The pressure control valve 9 is arranged on the cooling water return pipeline of the steam condenser 8, the pressure sensor 28 is arranged on the low-pressure condensate tank 27, and the pressure sensor 28 is electrically connected with the pressure control valve 9. The pressure sensor 28 collects the pressure in the low-pressure condensate tank 27 in real time and transmits the pressure signal to the pressure control valve 9, and the pressure control valve 9 controls the opening degree in real time based on the pressure signal, so as to control the flow of the cooling water return, control the temperature and pressure of the liquid returned by the steam condenser 8 to the low-pressure condensate tank 27, and adjust the pressure in the low-pressure condensate tank 27.

[0026] The working principle of the utility model is as follows:

[0027] Ammonia rectification reboiler condensate output pipe 4 and phenol tower reboiler condensate output pipe 3 respectively input 3.8MP steam condensate to middle pressure condensate tank 5, ammonia removal tower reboiler condensate output pipe 2 and water tower reboiler condensate output pipe 1 respectively input 1.8MP steam condensate to middle pressure condensate tank 5, two kinds of steam condensate are mixed in middle pressure condensate tank 5, then steam enters ammonia removal tower reboiler steam input pipe 10, condensate enters low pressure condensate tank 27, low pressure condensate tank 27 simultaneously receives low pressure condensate output pipe 12 output low pressure condensate, the steam generated in low pressure condensate tank 27 is cooled by steam condenser 8 and becomes liquid and returns to low pressure condensate tank 27, low pressure condensate tank 27 output port d sends a part of low temperature condensate to first desuperheater 22 and second desuperheater 21 by desuperheater pump set 19, a part of low temperature condensate is output to condensate output header 15 by condensate output pump set 18 on low pressure condensate output port c.

Claims

1. A steam condensate recovery and utilization system for semi-coke wastewater treatment, characterized in that: The inlets a4, a2, a1, and a3 of the medium-pressure condensate tank are connected to the condensate output pipes of the ammonia distillation reboiler, the phenol tower reboiler, the deammoniation tower reboiler, and the water tower reboiler, respectively. The outlet b of the medium-pressure condensate tank is connected to the steam input pipe of the deammoniation tower reboiler via a pipe, and the outlet C is connected to the inlet A3 of the low-pressure condensate tank via a pipe. The inlet A1 of the low-pressure condensate tank is connected to the flash condensate output pipe of the deammoniation tower reboiler. The steam output port b1 of the low-pressure condensate tank is connected to the steam inlet of the steam condenser via a pipe. The liquid output of the steam condenser... The inlet is connected to the inlet b3 of the low-pressure condensate tank via a pipe. The inlet b2 of the low-pressure condensate tank is connected to the condensate output pipe of the crude phenol tank via a pipe. The low-pressure condensate output port c is connected to the condensate output main pipe via a condensate output pump group. The low-temperature condensate output port d is connected in parallel to the inlet I of the first desuperheater and the inlet I of the second desuperheater via a desuperheating condensate pump group. The inlet II of the first desuperheater is connected to the high-pressure steam pipe. The outlet of the first desuperheater is connected in parallel to the inlet II of the second desuperheater and the inlet pipe of the phenol tower reboiler. The outlet of the second desuperheater is connected to the inlet pipe of the water tower reboiler.

2. The steam condensate recovery and utilization system for semi-coke wastewater treatment according to claim 1, characterized in that: A first liquid level control valve is installed on the pipeline between the liquid outlet C and the liquid inlet A3 of the low-pressure condensate tank, and a first liquid level sensor is installed on the medium-pressure condensate tank. The first liquid level sensor is electrically connected to the first liquid level control valve.

3. The steam condensate recovery and utilization system for semi-coke wastewater treatment according to claim 1, characterized in that: A second liquid level controller is installed on the condensate output main pipe, and a second liquid level sensor is installed on the low-pressure condensate tank. The second liquid level sensor is electrically connected to the second liquid level control valve.

4. The steam condensate recovery and utilization system for semi-coke wastewater treatment according to claim 1, characterized in that: The outlet b of the medium-pressure condensate tank is also connected to the low-pressure steam pipeline network via a valve.

5. The steam condensate recovery and utilization system for semi-coke wastewater treatment according to claim 1, characterized in that: A first temperature control valve is installed on the pipeline between the desuperheating condensate pump unit and the inlet I of the first desuperheater. A first temperature sensor is installed on the first desuperheater, and the first temperature sensor is electrically connected to the first temperature control valve.

6. The steam condensate recovery and utilization system for semi-coke wastewater treatment according to claim 1, characterized in that: A second temperature control valve is installed on the pipeline between the desuperheating condensate pump unit and the inlet I of the second desuperheater. A second temperature sensor is installed on the second desuperheater, and the second temperature sensor is electrically connected to the second temperature control valve.

7. The steam condensate recovery and utilization system for semi-coke wastewater treatment according to claim 1, characterized in that: A pressure control valve is installed on the cooling water return pipe of the steam condenser, and a pressure sensor is installed on the low-pressure condensate tank. The pressure sensor is electrically connected to the pressure control valve.

Images