Novel dead steam energy collecting device for carbon black tail gas boiler deaerator

Abstract

The utility model discloses a novel carbon black tail gas boiler deaerator dead steam energy collecting device which comprises a surface type heat exchanger, deaerators, a steam overflow box and a water seal, one end of the surface type heat exchanger is provided with a gas conveying pipeline assembly and a brine receiving main pipe, and the other end of a pipeline connecting assembly is connected with the two deaerators. The two deaerators are connected with the surface type heat exchanger through a backflow pipeline assembly, and the surface type heat exchanger is connected with the steam overflow box through a water seal. The surface type heat exchanger is used for processing saline water to form oxygen-containing gas, the oxygen-containing gas flows into the two deaerators along the gas conveying pipeline assembly, the two deaerators are used for forming dead steam condensed water, and the dead steam condensed water flows into the surface type heat exchanger along the backflow pipeline assembly. Dead steam condensation water is recycled, and economic benefits are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of carbon black tail gas, and specifically to a novel exhaust steam energy recovery device of a deaerator of a carbon black tail gas boiler. Background Art

[0002] Boiler feed water generally uses thermal deaerators, and its oxygen is carried by water vapor and discharged into the atmosphere, causing energy waste and environmental pollution. Recycle the exhaust steam to heat the deaerator feed water to reduce the steam used by the deaerator. Or heat other feed water to improve the efficiency of other equipment. Recycle the exhaust steam condensate for reuse to improve economic benefits. Summary of the invention

[0003] In view of the deficiencies in the prior art, the present invention provides a novel exhaust steam energy recovery device for a deaerator of a carbon black tail gas boiler, which solves the problem that the existing boiler cannot recycle and reuse the exhaust steam.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a new type of carbon black tail gas boiler deaerator exhaust steam energy collection device, including a surface heat exchanger, a deaerator, an overflow box and a water seal, one end of the surface heat exchanger is provided with a gas pipeline assembly and a salt jellyfish pipe, the other end of the pipeline connection assembly is connected to two deaerators, the two deaerators are connected to the surface heat exchanger through a reflux pipeline assembly, and the surface heat exchanger is connected to the overflow box through a water seal.

[0005] Preferably, the gas pipeline assembly includes an air inlet pipe and a first connecting pipe; the upper part of one end of the surface heat exchanger is connected to the air inlet pipe, and one end of the surface heat exchanger is connected to a salt jellyfish connecting pipe near the bottom of the air inlet pipe, and both the air inlet pipe and the salt jellyfish connecting pipe are provided with stop valves, and the top of the air inlet pipe is connected to the first connecting pipe, and the first connecting pipe is provided with two stop valves, and the two stop valves are arranged near the end connected to the air inlet pipe.

[0006] Preferably, a heat exchanger exhaust pipe is also connected to the top of the surface heat exchanger.

[0007] Preferably, the upper portion of the air inlet pipe is also connected to a first branch pipe, the first branch pipe is used to be connected to the drain tank, and a stop valve is provided on the first branch pipe.

[0008] Preferably, the deaerator includes a deaerator head, a deaerator exhaust pipe and a second connecting pipe; the deaerator head is connected to the top of the deaerator, both ends of the first connecting pipe are respectively connected to the deaerator head of the deaerator, the deaerator head is connected to the top of the deaerator head, and a second connecting pipe is connected between the two deaerator exhaust pipes, a stop valve is provided on the deaerator exhaust pipe higher than the end connected to the second connecting pipe, and a plurality of stop valves are provided on the second connecting pipe.

[0009] Preferably, the middle portion of the second connecting pipe is connected to a second branch pipe, the second branch pipe is connected to the surface heat exchanger, and a stop valve is provided on the second branch pipe.

[0010] Preferably, the surface heat exchanger also includes a heat exchanger discharge pipe, an overflow box, a drain pipe, a steam box discharge pipe and a water seal; the bottom of the surface heat exchanger is connected to the water seal, the bottom of the water seal is connected to the overflow box, one end of the overflow box is connected to the drain pipe, the drain pipe is provided with a stop valve, the drain pipe is used to connect to the drain box, the top of the overflow box is connected to the steam box discharge pipe, and the steam box discharge pipe is provided with a stop valve.

[0011] Compared with the existing technology, the utility model has the following beneficial effects: the utility model processes brine into oxygen-carrying gas through a surface heat exchanger, the oxygen-carrying gas flows into two deaerators along a gas transmission pipeline assembly, and exhaust steam condensate is formed from the oxygen-carrying gas through the two deaerators, and the exhaust steam condensate flows back into the surface heat exchanger along a reflux pipeline assembly, so that the exhaust steam condensate is recycled and utilized, thereby improving economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a schematic diagram of the planar structure of the boiler deaerator exhaust steam energy collector in this practical application.

[0013] Markings in the figure: 1. Surface heat exchanger, 101. Air inlet pipe, 102. First branch pipe, 103. First connecting pipe, 104. Jellyfish connecting pipe, 105. Heat exchanger discharge pipe, 2. Deaerator, 21. Deaerator head, 201. Deaerator discharge pipe, 202. Second connecting pipe, 203. Second branch pipe, 3. Overflow box, 301. Drain pipe, 302. Steam box discharge pipe, 4. Water seal. DETAILED DESCRIPTION

[0014] like Figure 1 As shown; the utility model provides a technical solution: a new type of carbon black tail gas boiler deaerator exhaust steam energy recovery device, including a surface heat exchanger 1, a deaerator 2, an overflow box 3 and a water seal 4; one end of the surface heat exchanger 1 is provided with a gas pipeline assembly and a salt jellyfish pipe 104, and the other end of the pipeline connection assembly is connected to two deaerators 2, the two deaerators 2 are connected to the surface heat exchanger 1 through a reflux pipeline assembly, and the surface heat exchanger 1 is connected to the overflow box 3 through a water seal 4.

[0015] Further, the gas pipeline assembly includes an air inlet pipe 101 and a first connecting pipe 103; the upper part of one end of the surface heat exchanger 1 is connected to the air inlet pipe 101, and the one end of the surface heat exchanger 1 is connected to the salt jellyfish pipe 104 near the bottom of the air inlet pipe 101, and the air inlet pipe 101 and the salt jellyfish pipe 104 are both provided with stop valves, the top of the air inlet pipe 101 is connected to the first connecting pipe 103, and the first connecting pipe 103 is provided with two stop valves, and the two stop valves are arranged on one end connected to the air inlet pipe 101. Adjacent parts of the ends; first, one or two surface heat exchangers 1 are added, and the stop valve of the brine jellyfish pipe 104 is opened, and the brine enters the surface heat exchanger 1 along the brine jellyfish pipe 104, and the brine is heated by the surface heat exchanger 1. At the same time, the stop valves of the air inlet pipe 101 and the first connected pipe 103 are opened, so that the oxygen-carrying gas flows along the air inlet pipe 101 into the first connected pipe 103, and then the oxygen-carrying gas flows along the first connected pipe 103 into the deaerator heads 21 at both ends.

[0016] Furthermore, a heat exchanger discharge pipe 105 is connected to the top of the surface heat exchanger 1; after the surface heat exchanger 1 heats the brine, if it is necessary to discharge non-condensable gases such as oxygen, the stop valve of the heat exchanger discharge pipe 105 can be opened, and non-condensable gases such as oxygen are discharged from the heat exchanger discharge pipe 105 of the surface heat exchanger 1.

[0017] Furthermore, a first branch pipe 102 is connected to the upper portion of the air inlet pipe 101 . The first branch pipe 102 is used to be connected to the drain tank, and a stop valve is provided on the first branch pipe 102 .

[0018] Further, the deaerator 2 includes a deaerator head 21, a deaerator discharge pipe 201 and a second connecting pipe 202; the deaerator head 21 is connected to the top of the deaerator 2, both ends of the first connecting pipe 103 are respectively connected to the deaerator head 21 of the deaerator 2, the deaerator head 21 is connected to the top of the deaerator head 21, and the second connecting pipe 202 is connected between the two deaerator discharge pipes 201, and a stop valve is provided on the deaerator discharge pipe 201 above the end connected to the second connecting pipe 202, and the second A plurality of stop valves are provided on the connecting pipe 202; after the oxygen-bearing gas enters the deaerator head 21, two deaerators 2 are used to process the oxygen-bearing gas, and after adding water or condensing water, exhaust steam condensate is formed. At this time, the stop valve of the deaerator exhaust pipe 201 is closed, and the stop valves of the second connecting pipe 202 and the second branch pipe 203 are opened, and the exhaust steam condensate enters the deaerator exhaust pipe 201, and then the exhaust steam condensate flows along the deaerator exhaust pipe 201 into the second connecting pipe 202.

[0019] Furthermore, the middle part of the second connecting pipe 202 is connected to the second branch pipe 203, the second branch pipe 203 is connected to the surface heat exchanger 1, and a stop valve is provided on the second branch pipe 203; then the exhaust steam condensate entering the second connecting pipe 202 flows back along the second branch pipe 203 and enters the surface heat exchanger 1.

[0020] Furthermore, the surface heat exchanger 1 also includes a heat exchanger discharge pipe 105, an overflow box 3, a drain pipe 301, a steam box discharge pipe 302 and a water seal 4; the surface heat exchanger 1 is connected to the water seal 4 at the bottom, the water seal 4 is connected to the overflow box 3 at the bottom, the overflow box 3 is connected to the drain pipe 301 at one end, the drain pipe 301 is provided with a stop valve, the drain pipe 301 is used to connect with the drain box, the top of the overflow box 3 is connected to the steam box discharge pipe 302, and the steam box discharge pipe 302 is provided with a stop valve; the exhaust steam condensate flows back into the surface heat exchanger 1, the exhaust steam condensate is heated and processed by the surface heat exchanger 1, the processed exhaust steam condensate enters the overflow box 3 along the water seal 4, and the processed exhaust steam condensate is processed again by the overflow box 3, so that the drain water flows into the drain box along the drain pipe 301 for use in the production line.

[0021] Two deaerators 2 specifications and models;

[0022]

[0023] Exhaust volume calculation;

[0024] For low-pressure deaerator 2, under normal operation, the exhaust volume is generally 1%-1.5% of the output of deaerator 2. Taking the middle value of 1.2%, we get:

[0025] 35 ton boiler deaerator 2 exhaust volume: 40 t / h*1.2%=0.48 t / h;

[0026] 75 ton boiler deaerator 2 exhaust volume: 85t / h*1.2%=1.02t / h;

[0027] Total: 0.48+1.02=1.5t / h;

[0028] According to this calculation, the exhaust volume of the deaerator 2 of the two boilers is 1.5t / h in total; the exhaust gate of deaerator 2 is a manual valve and is located very high, and is generally not adjusted, so the exhaust volume of deaerator 2 changes with the operating conditions of the boiler; the two boilers in the factory are not operating at full load, and calculated at 60% load, the exhaust volume of the two deaerators is 0.9t / h.

[0029] Economic benefits;

[0030] The heat energy calculation of exhaust steam recovery from deaerator 2 is expressed as:

[0031] Q = G1h1-G2h2;

[0032] In the formula, Q represents the recovered heat kj / h, G1 represents the recovered steam volume kg / h, h1 represents the recovered steam enthalpy kj / kg, G2 represents the discharged steam volume kg / h, the discharged steam volume is calculated as 3% of the intake air, and h2 represents the discharged steam enthalpy kj / kg;

[0033] Q=(900×2675)-(900×0.03×2636)=2336328kj / h;

[0034] The exhaust steam recovery of deaerator 2 is calculated based on 8000 hours of operation per year, and the recovered heat energy is 18690.62GJ / year, expressed as:

[0035] 2336328 kj / h×8000h÷1000000=18690.62 Gj / year;

[0036] Low-level heat energy, calculated at 20 yuan per GJ, the annual heat recovery is equivalent to RMB 373,812.48, expressed as:

[0037] 20 yuan / GJ×18690.62Gj=373812.48(￥);

[0038] The amount of condensate recovered from exhaust steam of deaerator 2 is calculated as follows:

[0039] Q S =G1-G2;

[0040] In the formula, Q S Indicates the amount of recovered condensate kg / h, G1 indicates the amount of recovered steam kg / h, G2 indicates the amount of discharged steam kg / h, and the amount of discharged steam is calculated as 3% of the intake air;

[0041] Q S =900-36=864kg / h;

[0042] Based on 8,000 hours of operation per year, the amount of condensate recovered is 6,912 tons / year, expressed as:

[0043]

[0044] Condensate is calculated as desalted water at RMB 8 per ton, and the recovered condensate is equivalent to RMB 37, expressed as:

[0045] 6912×8=55296(￥);

[0046] Total: The annual economic benefits are 429,100 yuan, expressed as:

[0047] 373812.48+55296=429108.48￥.

[0048] Although the embodiments of the present invention have been shown and described, it will be understood 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; the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A novel carbon black tail gas boiler deaerator exhaust steam energy recovery device, comprising a surface heat exchanger (1), a deaerator (2), an overflow tank (3) and a water seal (4), characterized in that: One end of the surface heat exchanger (1) is provided with a gas pipeline assembly and a jellyfish pipe (104), and the other end of the pipeline connection assembly is connected to two deaerators (2). The two deaerators (2) are connected to the surface heat exchanger (1) via a reflux pipeline assembly, and the surface heat exchanger (1) is connected to the overflow tank (3) via a water seal (4).

2. According to claim 1, a novel carbon black tail gas boiler deaerator exhaust steam energy recovery device is characterized in that: The gas transmission pipeline assembly comprises an air intake pipe (101) and a first connecting pipe (103); the upper part of one end of the surface heat exchanger (1) is connected to the air intake pipe (101); the end of the surface heat exchanger (1) is connected to a salt jellyfish pipe (104) near the bottom of the air intake pipe (101); both the air intake pipe (101) and the salt jellyfish pipe (104) are provided with stop valves; the top of the air intake pipe (101) is connected to the first connecting pipe (103); the first connecting pipe (103) is provided with two stop valves, and the two stop valves are arranged near the end connected to the air intake pipe (101).

3. A novel carbon black tail gas boiler deaerator exhaust steam energy recovery device according to claim 2, characterized in that: The top of the surface heat exchanger (1) is also connected to a heat exchanger discharge pipe (105).

4. A novel carbon black tail gas boiler deaerator exhaust steam energy recovery device according to claim 3, characterized in that: The upper part of the air inlet pipe (101) is also connected to a first branch pipe (102), the first branch pipe (102) is used to be connected to a drain tank, and a stop valve is provided on the first branch pipe (102).

5. A novel carbon black tail gas boiler deaerator exhaust steam energy recovery device according to claim 4, characterized in that: The deaerator (2) comprises a deaerator head (21), a deaerator discharge pipe (201) and a second connecting pipe (202); the deaerator head (21) is connected to the top of the deaerator (2); both ends of the first connecting pipe (103) are respectively connected to the deaerator head (21) of the deaerator (2); the deaerator head (21) is connected to the top of the deaerator head (21); the second connecting pipe (202) is connected between the two deaerator discharge pipes (201); a stop valve is provided on the deaerator discharge pipe (201) at a level higher than the end connected to the second connecting pipe (202); and a plurality of stop valves are provided on the second connecting pipe (202).

6. The novel carbon black tail gas boiler deaerator exhaust steam energy recovery device according to claim 5 is characterized by: The middle part of the second connecting pipe (202) is connected to the second branch pipe (203), the second branch pipe (203) is connected to the surface heat exchanger (1), and a stop valve is provided on the second branch pipe (203).

7. The novel carbon black tail gas boiler deaerator exhaust steam energy recovery device according to claim 6 is characterized by: The surface heat exchanger (1) further comprises a heat exchanger discharge pipe (105), an overflow tank (3), a drain pipe (301), a steam box discharge pipe (302) and a water seal (4); the bottom of the surface heat exchanger (1) is connected to the water seal (4), the bottom of the water seal (4) is connected to the overflow tank (3), one end of the overflow tank (3) is connected to the drain pipe (301), a stop valve is provided on the drain pipe (301), the drain pipe (301) is used to be connected to the drain tank, the top of the overflow tank (3) is connected to the steam box discharge pipe (302), and the steam box discharge pipe (302) is provided with a stop valve.

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