CN217816698U - Comprehensive utilization system for waste heat boiler sewage - Google Patents
Comprehensive utilization system for waste heat boiler sewage Download PDFInfo
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- CN217816698U CN217816698U CN202221429776.1U CN202221429776U CN217816698U CN 217816698 U CN217816698 U CN 217816698U CN 202221429776 U CN202221429776 U CN 202221429776U CN 217816698 U CN217816698 U CN 217816698U
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Abstract
The utility model discloses a comprehensive utilization system of waste heat boiler blow-down water, which comprises a first steam generator, a top inlet communicated with a first water replenishing pipe, a top outlet communicated with a first byproduct steam conveying pipe, and a bottom outlet connected with a first water conveying pipe; a top inlet of the second steam generator is communicated with a second water replenishing pipe, a top outlet of the second steam generator is communicated with a second byproduct steam conveying pipe, and a bottom outlet of the second steam generator is connected with a second water conveying pipe; a top inlet of the third steam generator is communicated with a third water replenishing pipe, a top outlet of the third steam generator is communicated with a third subsidiary product steam conveying pipe, and a bottom outlet of the third steam generator is connected with a third water conveying pipe; the inlet of the gas-liquid separator is respectively communicated with the second water conveying pipe and the third water conveying pipe; and the inlet of the stripping tower is communicated with the first water conveying pipe and is used for recycling the heat of the water discharged by the first steam generator. The utility model discloses can make steam generator discharge stove water heat obtain comprehensive utilization and stove water need not to discharge, can not cause the harm that the workman scalded.
Description
Technical Field
The utility model relates to a coal chemical industry equipment technical field, concretely relates to comprehensive utilization system of exhaust heat boiler blowdown water.
Background
In the early 50 s, with the development of a large amount of petroleum, natural gas becomes a main raw material for preparing methanol, but with the increase of the price of crude oil, the difficulty of producing methanol by depending on methanol and natural gas is brought, so that the source of the methanol raw material is changed to coal resources, and methanol can be prepared from coal of any variety.
With the progress of science and technology, advanced equipment is provided for the gasification of various coals through gasification furnaces (a Texaco furnace for water coal slurry pressurized gasification, a pulverized coal pressurized furnace (a Scherrer furnace for gasification and the like).
An important process in the coal-to-gas process or the coal-to-methanol process is CO conversion, and the main task is to adjust the C/H ratio and convert the excessive CO into H 2 The transformation process mainly comprises the following steps according to different gasification processes: the normal pressure gas making is matched with the transformation, the step-by-step intermediate cooling and the humidification are carried out, and the stable operation of the transformation is controlled.
The conversion system is provided with waste heat boilers (namely steam generators) with three pressure levels, and can respectively prepare by-product steam with three pressure levels of 4.0MPa, 1.2MPa and 0.5MPa, in the process of generating the by-product steam, furnace water needs to be periodically discharged to ensure that each index in the by-product steam is qualified, because in the design process, the furnace water of the steam generators with three pressure levels of 4.0MPa, 1.2MPa and 0.5MPa is discharged and converged into the same gas-liquid separator, and is discharged to a sewage treatment section after being cooled, the indexes in the furnace water exceed the standard due to the limited treatment discharge capacity of the gas-liquid separator, the discharge capacity of the furnace water of the steam generators with the three pressure levels cannot meet the requirement, and the quality of the steam in the generated steam is not high (the conductivity is not less than 50 mu s/cm, and the PH is less than 7.0).
The solutions adopted to solve the above problems in the prior art are: the first scheme is that the steam generator with three pressure levels is intermittently discharged; the second scheme is to increase the dosage of the medicament in the boiler water of the steam generator. The third scheme is to open the steam generator to conduct and drain on site, so as to increase the discharge amount.
But adopt and give the problem that the solution can take place the people and scald and the energy is extravagant among the above-mentioned prior art, consequently design one kind can steam generator discharge stove water heat and comprehensive utilization and do not scald workman's sewage tower return tank deoiling device and have very important meaning.
SUMMERY OF THE UTILITY MODEL
The utility model aims at overcoming the problem among the prior art, provide a comprehensive utilization system of exhaust heat boiler blow-down water.
The utility model provides a comprehensive utilization system of exhaust heat boiler blow-down water, include: the top inlet of the first steam generator is communicated with a first water replenishing pipe, the top outlet of the first steam generator is communicated with a first byproduct steam conveying pipe, and the bottom outlet of the first steam generator is connected with a first water conveying pipe; a top inlet of the second steam generator is communicated with a second water replenishing pipe, a top outlet of the second steam generator is communicated with a second byproduct steam conveying pipe, and a bottom outlet of the second steam generator is connected with a second water conveying pipe; a top inlet of the third steam generator is communicated with a third water replenishing pipe, a top outlet of the third steam generator is communicated with a third subsidiary product steam conveying pipe, and a bottom outlet of the third steam generator is connected with a third water conveying pipe; the inlet of the gas-liquid separator is respectively communicated with the second water conveying pipe and the third water conveying pipe; and the inlet of the stripping tower is communicated with the first water conveying pipe and is used for recycling the heat of the water discharged by the first steam generator.
Preferably, the gas-liquid separator is communicated with the sewage treatment system through a first drain pipe arranged on the bottom.
Preferably, a circulating water cooler is further connected between the first liquid discharge pipe and the sewage treatment system, an inlet of the circulating water cooler is communicated with the first discharge pipe, and an outlet of the circulating water cooler is communicated with the sewage system through a second discharge pipe.
Preferably, the first water replenishing pipe, the second water replenishing pipe and the third water replenishing pipe are all provided with check valves.
Preferably, the bottoms of the first steam generator, the second steam generator and the third steam generator are respectively communicated with a liquid discharge pipe.
Preferably, valves are arranged on the first subsidiary product steam delivery pipe, the first water delivery pipe, the second subsidiary product steam delivery pipe, the second water delivery pipe, the third subsidiary product steam delivery pipe, the third water delivery pipe and the liquid discharge pipe.
Preferably, the valve is a shut-off valve.
Preferably, the drain pipe is communicated with the trench.
Compared with the prior art, the beneficial effects of the utility model are that:
1. the utility model provides a steam generator's of three pressure grades stove water can reach continuous emission, ensures that stove water replacement volume and steam index are qualified (the conductivity is < 35 mus/cm, 8.0 < PH < 9.0).
2. The utility model provides a 0.5MPa steam generator discharges in the stove water sends into the strip tower, discharges 0.5MPa steam generator and discharges stove water heat and obtain the recovery and recycle.
3. The utility model discloses in can sending into the strip tower with 0.5MPa steam generator discharge stove water, the steam generator stove water of having avoided three pressure level discharges simultaneously and converges into with a vapour and liquid separator after, discharge to the sewage treatment workshop section after the cooling, the vapour and liquid separator's that leads to treatment discharge capacity is limited, and then make the steam generator stove water discharge volume of three pressure level can not reach the requirement, the problem that the index exceeds standard in the stove water discharges, the steam generator stove water of also having avoided three pressure level simultaneously discharges on the spot, the emergence of personnel scald accident.
4. The utility model discloses in 0.5MPa steam generator discharged the boiler water and sent into the strip tower for the boiler water emission can not satisfy normal emission, so need reduce the boiler water in the medicinal agent (trisodium phosphate) addition, reduce medicament use cost.
Drawings
FIG. 1 is a process flow diagram of the present invention;
FIG. 2 is a prior art process flow diagram;
fig. 3 is a flow chart of the actual production process of the present invention.
Description of reference numerals:
1. the system comprises a first steam generator, 2, a first water supplementing pipe, 3, a first byproduct steam conveying pipe, 4, a first water conveying pipe, 5, a second steam generator, 6, a second water supplementing pipe, 7, a second byproduct steam conveying pipe, 8, a second water conveying pipe, 9, a third steam generator, 10, a third water supplementing pipe, 11, a third byproduct steam conveying pipe, 12, a third water conveying pipe, 13, a gas-liquid separator, 14, a first liquid discharging pipe, 15, a stripping tower, 16, a circulating water cooler and 17, a liquid discharging pipe.
Detailed Description
The following detailed description of the present invention is provided in conjunction with the accompanying drawings 1-3, but it should be understood that the scope of the present invention is not limited by the detailed description. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
Examples
As shown in fig. 1-3, the utility model provides a comprehensive utilization system of exhaust heat boiler sewage, including: the system comprises a first steam generator 1, a second steam generator 5, a third steam generator 9, a gas-liquid separator 13 and a stripping tower 15, wherein the top inlet of the first steam generator 1 is communicated with a first water supplementing pipe 2, the top outlet of the first steam generator 1 is communicated with a first byproduct steam conveying pipe 3, and the bottom outlet of the first steam generator 1 is connected with a first water conveying pipe 4; the top inlet of the second steam generator 5 is communicated with a second water replenishing pipe 6, the top outlet of the second steam generator 5 is communicated with a second byproduct steam conveying pipe 7, and the bottom outlet of the second steam generator 5 is connected with a second water conveying pipe 8; the top inlet of the third steam generator 9 is communicated with a third water replenishing pipe 10, the top outlet of the third steam generator 9 is communicated with a third byproduct steam conveying pipe 11, and the bottom outlet of the third steam generator 9 is connected with a third water conveying pipe 12; the inlet of the gas-liquid separator 13 is respectively communicated with the second water conveying pipe 8 and the third water conveying pipe 12; the inlet of the stripping tower 15 is communicated with the first water pipe 4 and is used for recycling heat of water discharged by the first steam generator 1, wherein furnace water discharged by the 0.5MPa steam generator is sent into the stripping tower for recycling because the operating pressure of the stripping tower is 0.2Mpa, and the furnace water pressure of 4.0Mpa and 1.2Mpa are too high, the tower overpressure may be caused after the furnace water is sent into the stripping tower, in addition, excessive furnace water sent into a waste heat boiler is discharged to the stripping tower, the load of the stripping tower is greatly occupied, in addition, furnace water sent into the second water pipe 8 and the third water pipe 12 is subjected to gas-liquid separation in the gas-liquid separator 13, and 0.5MPa steam generated in the gas-liquid separator 13 is sent into the steam pipe network for utilization through a pipeline communicated with the top of the gas-liquid separator 13.
Further, the gas-liquid separator 13 communicates with a sewage treatment system through a first drain pipe 14 provided on the bottom.
Further, still be connected with circulating water cooler 16 between first drain pipe 14 and the sewage treatment system, circulating water cooler 16's entry and first exhaust pipe 14 intercommunication, circulating water cooler 16's export is passed through second delivery pipe and sewage treatment system intercommunication, and wherein circulating water cooler 16 is used for cooling for the blowdown water, sends to sewage treatment system after the cooling and handles.
Furthermore, check valves are arranged on the first water replenishing pipe 2, the second water replenishing pipe 6 and the third water replenishing pipe 10.
Furthermore, the bottoms of the first steam generator 1, the second steam generator 5 and the third steam generator 9 are respectively communicated with a liquid discharge pipe 17.
Further, valves are arranged on the first subsidiary product steam delivery pipe 3, the first water delivery pipe 4, the second subsidiary product steam delivery pipe 7, the second water delivery pipe 8, the third subsidiary product steam delivery pipe 11, the third water delivery pipe 12 and the liquid discharge pipe 17.
Further, the valve is a stop valve.
Further, the drain pipe 16 communicates with the trench.
The process principle is as follows:
the conversion section of the conversion system is two series, and the design capacity of each series is 90 ten thousand tons/year DMTO grade methanol. The two series of transformations are relatively independent. In this section, CO in the process gas is partially converted into H 2 。
The chemical reaction in this section is a shift reaction, and is represented by the following equation:
CO+H 2 O→H 2 +CO 2
the crude gas from the washing tower of the gasification section is separated from moisture carried by the gas by a No. 1 gas-liquid separator at the temperature of 248 ℃ and the pressure of 8.0MPa (G), and then is divided into two streams, wherein one stream is sent to a shift converter for shift reaction (exothermic reaction), and the other stream is mixed with the shift gas after being cooled without being shifted. The converted gas and the non-converted gas absorb most of the heat through a waste heat boiler in the system to generate steam with different pressure levels.
In order to solve the problems that boiler water of a waste heat boiler (namely a steam generator) for preparing byproduct steam with three pressure levels of 4.0MPa, 1.2MPa and 0.5MPa, which is arranged in the existing coal-to-methanol conversion system, needs to be regularly discharged to ensure that all indexes in the byproduct steam are qualified, however, in the design process, the boiler water of the steam generator with the three pressure levels of 4.0MPa, 1.2MPa and 0.5MPa is discharged and converged into the same gas-liquid separator, and then is discharged to a sewage treatment section after being cooled, however, the discharge capacity of the gas-liquid separator is limited, the discharge capacity of the boiler water of the steam generator with the three pressure levels cannot meet the requirement, the indexes in the boiler water exceed the standard, so that the quality of the steam in the produced steam is not high (the conductivity is more than or equal to 50 mu s/cm, and the PH is less than 7.0), and the steam generator with the three pressure levels needs to be intermittently discharged and drained and heat cannot be recovered and people are scalded.
Therefore, a first water supplementing pipe 2, a second water supplementing pipe 6 and a third water supplementing pipe 10 are required to be respectively added into a first steam generator 1, a second steam generator 5 and a third steam generator 9 for preparing steam of 0.5MPa, 1.2MPa and 4.0MPa, the prepared steam of 0.5MPa, the prepared steam of 1.2MPa and the prepared steam of 4.0MPa are respectively output through a first secondary product steam delivery pipe 3 communicated with the first steam generator 1, a second secondary product steam delivery pipe 7 communicated with the second steam generator 5 and a third secondary product steam delivery pipe 11 communicated with the third steam generator 9, furnace water in the first steam generator 1 is delivered into a stripping tower 15 through the first water delivery pipe 4 for recovering heat of the furnace water in the first steam generator 1, the furnace water in the second steam generator 5 and the furnace water in the third steam generator 9 are respectively delivered into a gas-liquid separator 13 through a second water delivery pipe 8 and a third water delivery pipe 12 for removing impurities, and a sewage treatment system is carried out on the cooled and precipitated liquid through a circulating water cooler 16 and a sewage treatment system.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. A comprehensive utilization system of waste heat boiler blow-down water is characterized by comprising:
the top inlet of the first steam generator (1) is communicated with the first water replenishing pipe (2), the top outlet of the first steam generator is communicated with the first byproduct steam conveying pipe (3), and the bottom outlet of the first steam generator is connected with the first water conveying pipe (4);
a top inlet of the second steam generator (5) is communicated with a second water replenishing pipe (6), a top outlet of the second steam generator is communicated with a second byproduct steam conveying pipe (7), and a bottom outlet of the second steam generator is connected with a second water conveying pipe (8);
a top inlet of the third steam generator (9) is communicated with a third water replenishing pipe (10), a top outlet of the third steam generator is communicated with a third byproduct steam conveying pipe (11), and a bottom outlet of the third steam generator is connected with a third water conveying pipe (12);
the inlet of the gas-liquid separator (13) is respectively communicated with the second water conveying pipe (8) and the third water conveying pipe (12);
and the inlet of the stripping tower (15) is communicated with the first water conveying pipe (4) and is used for reusing the heat of the water discharged by the first steam generator (1).
2. The comprehensive utilization system of exhaust water of a waste heat boiler as claimed in claim 1, wherein the gas-liquid separator (13) is communicated with the sewage treatment system through a first exhaust pipe (14) provided on a bottom.
3. The comprehensive utilization system of waste heat boiler blow-down water of claim 2, characterized in that a circulating water cooler (16) is connected between the first blow-down pipe (14) and the sewage treatment system, an inlet of the circulating water cooler (16) is communicated with the first blow-down pipe (14), and an outlet of the circulating water cooler (16) is communicated with the sewage system through a second discharge pipe.
4. The comprehensive utilization system of the exhaust water of the waste heat boiler as recited in claim 1, wherein the first water replenishing pipe (2), the second water replenishing pipe (6) and the third water replenishing pipe (10) are provided with check valves.
5. The comprehensive utilization system of waste heat boiler blow-down water of claim 1, characterized in that the bottoms of the first steam generator (1), the second steam generator (5) and the third steam generator (9) are respectively communicated with a liquid discharge pipe (17).
6. The comprehensive utilization system of waste heat boiler blow-down water of claim 5, characterized in that valves are disposed on the first secondary steam delivery pipe (3), the first water delivery pipe (4), the second secondary steam delivery pipe (7), the second water delivery pipe (8), the third secondary steam delivery pipe (11), the third water delivery pipe (12) and the liquid discharge pipe (17).
7. The comprehensive utilization system of waste heat boiler blow-down water of claim 6, wherein said valve is a shut-off valve.
8. The system for the comprehensive utilization of exhaust heat boiler waste water according to claim 5, characterized in that the drain pipe (17) is communicated with a trench.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221429776.1U CN217816698U (en) | 2022-06-09 | 2022-06-09 | Comprehensive utilization system for waste heat boiler sewage |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221429776.1U CN217816698U (en) | 2022-06-09 | 2022-06-09 | Comprehensive utilization system for waste heat boiler sewage |
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| Publication Number | Publication Date |
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| CN217816698U true CN217816698U (en) | 2022-11-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202221429776.1U Active CN217816698U (en) | 2022-06-09 | 2022-06-09 | Comprehensive utilization system for waste heat boiler sewage |
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- 2022-06-09 CN CN202221429776.1U patent/CN217816698U/en active Active
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