CN218119735U

CN218119735U - Carbon black flue gas waste heat recovery utilizes system

Info

Publication number: CN218119735U
Application number: CN202222262682.6U
Authority: CN
Inventors: 李如祥; 赵双庆; 王玲; 张智广; 赵世军; 张强; 赵俊平
Original assignee: Wuhai Black Cat Carbon Black Co ltd
Current assignee: Wuhai Black Cat Carbon Black Co ltd
Priority date: 2022-08-26
Filing date: 2022-08-26
Publication date: 2022-12-23
Anticipated expiration: 2032-08-26

Abstract

The utility model relates to an energy recycle device technical field specifically is a carbon black flue gas waste heat recovery utilizes system is disclosed, and it includes removes brine pump, a plurality of heat transfer branch roads, charcoal black flue gas pipeline and oxygen-eliminating device, the heat transfer branch road includes heat exchanger, water inlet pipeline and outlet pipe line, and the heat exchanger is located charcoal black flue gas pipeline. This system increases a heat exchanger at carbon black production line secondary rapid cooling front end, utilizes carbon black flue gas waste heat to heat power generation boiler oxygen-eliminating device intaking to 90 ℃ to reduce oxygen-eliminating device steam consumption, reduced the volume of spouting into of secondary rapid cooling water simultaneously, reduce the danger that causes follow-up equipment to be corroded. The system saves water for carbon black production and reduces production cost; the steam consumption of the water supply of the power generation boiler heating deaerator is saved, so that the power generation capacity is increased, and the aim of killing two birds with one stone is fulfilled.

Description

Carbon black flue gas waste heat recovery utilizes system

Technical Field

The utility model relates to an energy recovery utilizes technical field, in particular to carbon black flue gas waste heat recovery utilizes system.

Background

In the production process of carbon black, most carbon black enterprises are respectively provided with an air preheater with preheated air temperature of 850 ℃, a raw oil preheater with preheated raw oil temperature higher than 250 ℃ and a waste heat boiler capable of generating pressure of 0.6MPa at the rear part of a reaction furnace in order to utilize the waste heat of carbon black flue gas. After passing through the three heat exchange devices, the temperature of the carbon black flue gas is still about 450 ℃, and the upper limit of the temperature which can be borne by the bag filter which enters the carbon black flue gas subsequently is about 280 ℃, so that the carbon black flue gas needs to be cooled before entering the bag filter. The cooling mode is that spray into atomizing water cooling (be secondary quench) into, and the spraying into of secondary quench water can increase the vapor content in the carbon black flue gas, increases the risk that follow-up equipment is corroded, has wasted the water resource again.

Therefore, in order to further utilize the waste heat of the carbon black flue gas and reduce the water spraying amount of secondary quenching, the waste heat is used for heating the desalted water entering the deaerator, the steam amount needed by the deaerator for heating is reduced, the water consumption of the carbon black can be reduced, the consumption of the power generation steam amount can be reduced, and the method has the advantages of improving the power generation amount and achieving two purposes.

Although the patent of the company with the application number of CN201820378892.2 and the name of 'a carbon black waste heat boiler steam recycling device' can also heat the water fed by a deaerator and reduce the amount of generated steam, the method only introduces the surplus steam generated by the waste heat boiler on a carbon black production line into a heater and uses the steam to heat the water fed into the deaerator, and has limited heating effect; secondly, the amount of secondary quenching water cannot be reduced.

Disclosure of Invention

The utility model aims at providing a carbon black flue gas waste heat recycling system, which further reduces the water spraying amount of secondary quenching and reduces the vapor content in the carbon black flue gas; meanwhile, the water entering the deaerator is heated, so that the steam quantity used for heating the deaerator is reduced, and the energy is saved.

In order to achieve the above purpose, the utility model adopts the following technical scheme.

A carbon black flue gas waste heat recycling system comprises a desalting water pump, a plurality of heat exchange branches, a carbon black flue gas pipeline and a deaerator, wherein each heat exchange branch comprises a heat exchanger, a water inlet pipeline and a water outlet pipeline; one end of the water inlet pipeline is connected with an outlet pipeline of the demineralized water pump, and the other end of the water inlet pipeline is connected with a refrigerant inlet of the heat exchanger; one end of the water outlet pipeline is connected with a refrigerant outlet of the heat exchanger, and the other end of the water outlet pipeline is connected with a water inlet of the deaerator; the water inlet pipeline is provided with a first automatic regulating valve, a first remote transmission pressure gauge and a first remote transmission temperature gauge, and the water outlet pipeline is provided with a check valve, a second remote transmission temperature gauge and a second remote transmission pressure gauge; and a remote-transmission flow meter is arranged on an outlet pipeline of the demineralized water pump.

Furthermore, all be equipped with first gate valve on water inlet pipeline and the outlet pipe line for control inlet line or outlet pipe line's circulation and closing when overhauing and maintaining.

Further, the carbon black flue gas waste heat recycling system comprises at least four heat exchange branches connected in parallel.

Furthermore, be equipped with a transport branch road between demineralized water pump and the oxygen-eliminating device, outlet line is connected with the water inlet of oxygen-eliminating device through carrying the branch road, carries to be equipped with second automatically regulated valve and second gate valve on the branch road, and second automatically regulated valve and second gate valve are in the closed condition usually, play with inlet line and outlet line detached effect.

Compared with the prior art, the utility model discloses the beneficial effect who brings is:

(1) The minimum supplement desalted water amount of 2 deaerators of the power generation boiler is about 40 tons/hour, the desalted water which enters the deaerators originally in the prior art is that a steam turbine is used for extracting and separating steam to heat normal temperature water (20 ℃) to 90 ℃, and 4.5 tons of steam are needed every hour. And adopt the utility model discloses a recycle system can reduce the oxygen-eliminating device and intake the steam that the heating needs used, and this part of steam of saving provides the steam turbine and uses daily can increase generated energy 23760KWh.

(2) By the recycling system, desalted water after the carbon black flue gas is cooled is conveyed to the deaerator, and water consumption of a secondary quenching process of the carbon black flue gas is reduced; the water consumption of each line of the carbon black production line is about 5 tons per hour, and the water consumption of the four production lines is 480 tons per day, so that the energy consumption cost of the carbon black is reduced.

(3) By adopting the system, the water vapor content in the carbon black smoke can be reduced, so that the risk of corroding rear equipment is reduced; and the water vapor content in the carbon black flue gas is reduced, and the heat value of the carbon black tail gas is increased, so that the tail gas can supply energy to a power boiler to produce steam.

Drawings

Fig. 1 is a schematic diagram of a carbon black flue gas waste heat recycling system in the embodiment of the present invention.

The figures are numbered: 1-desalting water pump, 2-deaerator, 3-carbon black smoke pipeline, 4-heat exchanger, 5-first automatic regulating valve, 6-second automatic regulating valve, 7-first remote transmission thermometer, 8-first remote transmission pressure gauge, 9-second remote transmission thermometer, 10-second remote transmission pressure gauge, 11-check valve, 12-remote transmission flowmeter, 13-first gate valve and 14-second gate valve.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention more clearly understood, the present invention will be described in further detail with reference to the accompanying drawings and detailed description. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and the present invention is not limited to the specific embodiments disclosed below.

The system for recycling the waste heat of the carbon black flue gas as shown in fig. 1 comprises a desalting water pump 1, four parallel heat exchange branches, a carbon black flue gas pipeline 3 and a deaerator 2, wherein each heat exchange branch comprises a heat exchanger 4, a water inlet pipeline and a water outlet pipeline, and the heat exchanger 4 is arranged in the carbon black flue gas pipeline 3 at the front end of a carbon black secondary quenching process; one end of the water inlet pipeline is connected with an outlet pipeline of the desalting water pump 1, and the other end of the water inlet pipeline is connected with a refrigerant inlet of the heat exchanger 4; one end of the water outlet pipeline is connected with a refrigerant outlet of the heat exchanger 4, and the other end of the water outlet pipeline is connected with a water inlet of the deaerator 2; the water inlet pipeline is provided with a first automatic regulating valve 5, a first remote transmission pressure gauge 8 and a first remote transmission temperature gauge 7, and the water outlet pipeline is provided with a check valve 11, a second remote transmission temperature gauge 9 and a second remote transmission pressure gauge 10; the outlet pipeline of the demineralized water pump 1 is provided with a remote flow meter 12 for monitoring the flow of the demineralized water delivered to the heat exchanger 4. Wherein, all be equipped with first gate valve 13 on water inlet pipeline and the outlet pipe line, control inlet pipe line or outlet pipe line's circulation and closing when the easy access maintenance.

In this embodiment, be equipped with a transport branch road between demineralized water pump 1 and the oxygen-eliminating device 2, outlet line is connected with the water inlet of oxygen-eliminating device 2 through carrying the branch road, carries to be equipped with second automatically regulated valve 6 on the branch road, respectively is equipped with a second gate valve 14 around second automatically regulated valve 6, and second automatically regulated valve 6 and second gate valve 14 are in the closed condition usually, play with inlet line and outlet line detached effect. Meanwhile, the conveying branch can also be used as a standby pipeline so as to be started when the heat exchange branch is maintained and convey desalted water to the deaerator 2. The first automatic regulating valve 5 and the second automatic regulating valve 6 are remote transmission pneumatic regulating valves; first automatically regulated valve 5, second automatically regulated valve 6, first teletransmission manometer 8, first teletransmission thermometer 7, second teletransmission thermometer 9, second teletransmission manometer 10 and teletransmission flowmeter 12 all with control room signal connection in long-range, well control room can the opening and close of first automatically regulated valve 5 of remote monitoring and second automatically regulated valve 6, can monitor water inlet pipeline and outlet pipeline's pressure, temperature status simultaneously. The first gate valve 13 and the second gate valve 14 are manual valves.

In practical application, the demineralized water pump 1 pressurizes and sends normal-temperature (20 ℃) demineralized water into the heat exchanger 4 through the water inlet pipeline, the carbon black smoke at 450 ℃ in the carbon black smoke pipeline 3 is used for heating the demineralized water to 90 ℃, and the demineralized water is sent to the deaerator 2 through the water outlet pipeline after heat exchange is completed. In the process, the heat exchange effect of the heat exchanger 4 can be evaluated through the difference between the first remote transmission thermometer 7 and the second remote transmission thermometer 9, and whether the leakage condition exists in the heat exchanger 4 can be judged through the difference between the first remote transmission pressure gauge 8 and the second remote transmission pressure gauge 10; the outlet pipe line is provided with a check valve 11 which can prevent the heated desalted water from flowing back. This carbon black flue gas waste heat recovery utilizes system can be according to 3 quantity of carbon black flue gas pipeline and the demineralized water volume that needs the heat transfer how much, increase and decrease heat transfer branch road, and a plurality of heat transfer branch roads are parallelly connected to be used, and each other does not influence, is favorable to going on smoothly and going on of maintenance work of heat transfer.

Adopt the utility model discloses a recycle system through the temperature that improves 2 water intakes of oxygen-eliminating device with carbon black flue gas heat transfer, has reduced the 2 steam that intake water heating of oxygen-eliminating device required use, has reduced the steam consumption volume promptly, and this part of steam of saving then can provide the steam turbine electricity generation and use to improve the generated energy. Through this recycle system, will give demineralized water after the carbon black flue gas cooling and carry to oxygen-eliminating device 2, and reduced the water consumption of carbon black flue gas secondary rapid cooling technology, reduce carbon black energy consumption cost. Meanwhile, the system can reduce the water vapor content in the carbon black smoke, so that the risk of corroding rear equipment is reduced; the steam content in the carbon black flue gas is reduced, the heat value of the carbon black tail gas is increased, and the carbon black tail gas can supply energy to a power generation boiler so as to produce steam. Thereby achieving the effect of dual energy saving.

Claims

1. A carbon black flue gas waste heat recycling system comprises a desalting water pump, a plurality of heat exchange branches, a carbon black flue gas pipeline and a deaerator, and is characterized in that the heat exchange branches comprise a heat exchanger, a water inlet pipeline and a water outlet pipeline, the heat exchanger is located in the carbon black flue gas pipeline, and the carbon black flue gas pipeline is located at the front end of secondary carbon black quenching; one end of the water inlet pipeline is connected with an outlet pipeline of the demineralized water pump, and the other end of the water inlet pipeline is connected with a refrigerant inlet of the heat exchanger; one end of the water outlet pipeline is connected with a refrigerant outlet of the heat exchanger, and the other end of the water outlet pipeline is connected with a water inlet of the deaerator; the water inlet pipeline is provided with a first automatic regulating valve, a first remote transmission pressure gauge and a first remote transmission temperature gauge, and the water outlet pipeline is provided with a check valve, a second remote transmission temperature gauge and a second remote transmission pressure gauge; and a remote-transmission flow meter is arranged on an outlet pipeline of the demineralized water pump.

2. The carbon black flue gas waste heat recovery and utilization system of claim 1, wherein the water inlet pipeline and the water outlet pipeline are both provided with a first gate valve for controlling the circulation and closing of the water inlet pipeline or the water outlet pipeline during maintenance.

3. The carbon black flue gas waste heat recovery and utilization system of claim 1, wherein the carbon black flue gas waste heat recovery and utilization system comprises at least four heat exchange branches connected in parallel.

4. The carbon black flue gas waste heat recycling system of claim 1, wherein a conveying branch is arranged between the desalting water pump and the deaerator, the water outlet pipeline is connected with a water inlet of the deaerator through the conveying branch, a second automatic regulating valve and a second gate valve are arranged on the conveying branch, and the second automatic regulating valve and the second gate valve are normally in a closed state to separate the water inlet pipeline from the water outlet pipeline.