A gasification process water pipeline equipment fouling experimental device

Abstract

The application discloses a kind of gasification process water pipeline equipment scale experimental device, including the raw water tank (1) for containing gasification process water, water inlet and the water outlet of the raw water tank (1) communication pressurized tank (3), water inlet and the water outlet of the pressurized tank (3) communication dispersant test device (7), the dispersant test device (7) is used to detect the scale condition of gasification process water, the connecting pipeline between the pressurized tank (3) and raw water tank (1) and the connecting pipeline between the pressurized tank (3) and dispersant test device (7) are respectively connected with feed pump (2) and circulating water pump (6).The gasification process water pipeline equipment scale experimental device can carry out relevant coal gasification ash water dispersant and other processing agent related tests under the condition of industrial operation device under the high temperature and high pressure environment of coal gasification black water, ash water.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of coal gasification, in particular to a gasification process water pipeline equipment fouling experimental device. BACKGROUND

[0002] The black water and grey water of the syngas washing and slag water treatment system of a coal gasification unit have complex compositions, containing Ca 2+ , Mg 2+ , CO 3 + , PO4 3+ , and a large amount of solid ash particles, which causes the blocking of water washing towers, quenching rings, heat exchangers and interconnecting pipelines, and affects the long-period stable operation of the gasification unit.

[0003] However, the sampling and detection of the black water system are difficult due to the pressure of 4.0 MPa and the temperature of 200℃, which brings certain difficulties to the stable operation of the black water system and the experimental development of treatment agents such as dispersants; the sampling of the grey water system is convenient due to the low temperature of 70-130℃ and the low pressure, but the development of related dispersant experiments in the industrial device will affect the stable operation of the system and bring certain safety hazards; there is no experimental device in the prior art that is specially designed for the pressure, temperature, PH value and water quality of the gasification black water and grey water unit, so that the coal gasification black water and grey water cannot be used to carry out related coal gasification grey water dispersant experiments under the conditions of industrial operation devices in the high-temperature and high-pressure environment, and the fouling mechanism of the coal gasification black water and grey water pipeline and equipment cannot be effectively analyzed, which makes it difficult to develop scale inhibitors and dispersants.

[0004] In summary, how to effectively solve the problem that the coal gasification black water and grey water cannot be used to carry out related coal gasification grey water dispersant experiments under the conditions of industrial operation devices in the high-temperature and high-pressure environment is an urgent problem for the technical personnel in the field. SUMMARY

[0005] The purpose of the present application is to provide a gasification process water pipeline equipment fouling experimental device, which can be used to carry out related coal gasification grey water dispersant experiments under the conditions of industrial operation devices in the high-temperature and high-pressure environment of the coal gasification black water and grey water.

[0006] To solve the above technical problems, the present application provides the following technical solutions:

[0007] The experimental device for scaling of a gasification process water pipeline equipment comprises a raw water tank for containing gasification process water, a pressurizing tank in communication with a water inlet and a water outlet of the raw water tank, and a dispersant testing device in communication with a water inlet and a water outlet of the pressurizing tank, the dispersant testing device being used for detecting scaling of the gasification process water, and a feed pump and a circulating water pump being connected in series on a connecting pipeline between the pressurizing tank and the raw water tank and on a connecting pipeline between the pressurizing tank and the dispersant testing device.

[0008] Preferably, the dispersant testing device comprises a black water pipeline module for simulating black water scaling rules, a water washing tower tray module for simulating water washing tower tray scaling rules, and a grey water heat exchanger module for simulating heat exchanger scaling rules, and the black water pipeline module, the water washing tower tray module and the grey water heat exchanger module are in a parallel relationship.

[0009] Preferably, the black water pipeline module, the water washing tower tray module and the grey water heat exchanger module are detachably connected with the connecting pipelines on two sides, and the connecting pipelines on the two sides are connected with the black water pipeline module, the water washing tower tray module and / or the grey water heat exchanger module.

[0010] Preferably, the water washing tower tray module comprises a grey water inlet pipe located at an upper portion, a synthetic gas outlet pipe, a synthetic gas inlet pipe located at a lower portion, a grey water outlet pipe, and a water washing tower single valve and a water washing tower tray descending pipe located in an inner portion.

[0011] Preferably, a water quality detection device and / or a solid content detection device are connected in series on a connecting pipeline between the pressurizing tank and the circulating water pump.

[0012] Preferably, a steam tracing device is connected in communication on the raw water tank, the pressurizing tank and the connecting pipeline therebetween.

[0013] Preferably, an exhaust gas treatment module is connected with an exhaust gas outlet of the dispersant testing device, and a pressure venting regulating valve is arranged on a connecting pipeline between the two, the pressure venting regulating valve being used for regulating internal pressure of the dispersant testing device.

[0014] Preferably, the dispersant testing device is connected with a pipeline internal detection system for detecting pipeline scaling conditions.

[0015] Preferably, a gasification gas environment simulation device is connected with a gas inlet of the dispersant testing device.

[0016] Preferably, a treated water outlet of the dispersant testing device is connected with a water inlet of the pressurizing tank, and a waste water outlet is connected with a waste water discharge tank.

[0017] The gasification process water pipeline equipment scaling experiment device provided by the application comprises a raw water tank, a pressurizing tank and a dispersant test device, the gasification process water is stored in the raw water tank, and the gasification process water is industrial-grade gasification black water or grey water directly obtained from a factory.

[0018] The water inlet of the pressurizing tank is communicated with the water outlet of the raw water tank, the pressurizing tank performs pressurizing treatment on the gasification process water, the pressure value of the gasification process water is pressurized to the pressure value of the gasification process water in the factory, the pressure value of the gasification process water in the factory is simulated, and the experimental environment is closer to the actual industrial operation environment. A feed pump is connected in series on the connecting pipeline between the pressurizing tank and the raw water tank, so that the gasification process water can reach a high pressure from a low pressure.

[0019] The water inlet of the dispersant test device is communicated with the water outlet of the pressurizing tank, and a circulating water pump is connected in series on the connecting pipeline between the pressurizing tank and the dispersant test device. The lift of the circulating water pump is any value between 20 m and 60 m, including the end value, so that the gasification process water in the pressurizing tank enters the dispersant test device, and the dispersant test device can detect the scaling condition of the gasification process water.

[0020] The gasification process water pipeline equipment scaling experiment device provided by the application is an experimental device specially for the pressure, temperature, PH value and water quality of gasification black water and grey water, simulates the pressure, temperature and gas composition of coal gasification black water and grey water, and enables the coal gasification black water and grey water to carry out related tests of the treatment agent such as the dispersant of the coal gasification grey water under the conditions of high temperature and high pressure and industrial operation devices, so that the scaling mechanism of the coal gasification black water and grey water pipeline and equipment can be effectively analyzed, and the basic conditions for researching the scaling law of the coal gasification black water and grey water pipeline and developing the dispersant are provided. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can be obtained by those skilled in the art without any creative effort on the basis of these drawings.

[0022] Figure 1 The structure schematic diagram of the gasification process water pipeline equipment scaling experiment device provided by the specific embodiment in the application is shown in the figure.

[0023] Figure 2 The structure schematic diagram of the dispersant test device in the application is shown in the figure. Figure 1

[0024] The marks in the drawings are as follows:

[0025] ​The raw water tank (1), the feed pump (2), the pressurizing tank (3), the grey water quality detection device (4), the solid content detection device (5), the circulating water pump (6), the dispersant testing device (7), the pressure venting regulating valve (8), the gasification gas environment simulation device (9), the wastewater discharge tank (10), the waste gas treatment module (11), the grey water inlet pipe (7-1), the synthetic gas inlet pipe (7-2), the synthetic gas outlet pipe (7-3), the grey water outlet pipe (7-4), the water washing tower single solid valve (7-5), and the water washing tower tray descending pipe (7-6). DETAILED DESCRIPTION

[0026] The core of the present application is to provide a gasification process water pipeline equipment fouling experimental device, which can carry out related coal gasification grey water dispersant and other treatment agent related tests under the conditions of industrial operation device under the high temperature and high pressure environment of coal gasification black water and grey water.

[0027] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0028] Please refer to Figures 1 to 2 , Figure 1 The structure diagram of the gasification process water pipeline equipment fouling experimental device provided in a specific embodiment of the present application is shown in the figure. Figure 2 The structure diagram of the dispersant testing device in the specific embodiment is shown in the figure. Figure 1 The structure diagram of the dispersant testing device in the specific embodiment is shown in the figure.

[0029] In a specific embodiment, the gasification process water pipeline equipment fouling experimental device provided by the present application comprises a raw water tank 1 for containing gasification process water, a pressurizing tank 3 with a water inlet communicating with the water outlet of the raw water tank 1, and a dispersant testing device 7 with a water inlet communicating with the water outlet of the pressurizing tank 3. The dispersant testing device 7 is used to detect the fouling condition of the gasification process water. The connecting pipeline between the pressurizing tank 3 and the raw water tank 1 and the connecting pipeline between the pressurizing tank 3 and the dispersant testing device 7 are respectively connected in series with a feed pump 2 and a circulating water pump 6.

[0030] In the above structure, the gasification process water pipeline equipment fouling experimental device comprises a raw water tank 1, a pressurizing tank 3, and a dispersant testing device 7. The gasification process water is contained in the raw water tank 1, and the gasification process water is industrial grade gasification black water or grey water directly obtained from a factory.

[0031] The water inlet of the pressurizing tank 3 is communicated with the water outlet of the raw water tank 1, and the pressurizing tank 3 performs pressurizing treatment on the gasification process water, so that the pressure value of the gasification process water is pressurized to the pressure value of the gasification process water in the factory, for example, 4 MPa, to simulate the pressure value of the gasification process water in the factory, so that the experimental environment is closer to the actual industrial operation environment.

[0032] The connecting pipeline between the pressurizing tank 3 and the raw water tank 1 is connected in series with the feeding pump 2, so that the gasification process water can reach from a low pressure to a high pressure.

[0033] The water inlet of the dispersant test device 7 is connected with the water outlet of the pressurizing tank 3, and the connecting pipeline between the pressurizing tank 3 and the dispersant test device 7 is connected in series with the circulating water pump 6, and the lift of the circulating water pump 6 is any value between 20-60 m, including the end value, so that the gasification process water in the pressurizing tank 3 enters the dispersant test device 7, and the dispersant test device 7 can detect the scaling condition of the gasification process water.

[0034] The gasification process water pipeline equipment scaling experimental device provided by the present application is an experimental device specially designed for the pressure, temperature, PH value, water quality and other conditions of the gasification black water and gray water unit, which simulates the pressure, temperature, gas composition and other conditions of the coal gasification black water and gray water, so that the coal gasification black water and gray water can be used to carry out related tests of the coal gasification gray water dispersant and other treatment agents under the conditions of high temperature and high pressure and industrial operation device, and the scaling mechanism of the coal gasification black water and gray water pipeline and equipment can be effectively analyzed, so as to provide a basic condition for studying the scaling law of the coal gasification black water and gray water pipeline and developing the dispersant.

[0035] On the basis of the above specific embodiments, the dispersant test device 7 includes a black water pipeline module, a water washing tower tray module and a gray water heat exchanger module, the black water pipeline module is a carbon steel or stainless steel pipe with different pipe diameters, the pipe diameter is 50-800 mm, the flow rate is 0.3-0.8 m / s, and the pipe pressure is 2-4.0 MPa, which is used to simulate the black water scaling law. The water washing tower tray module is used to simulate the scaling law of the water washing tower tray, and the gray water heat exchanger module is used to simulate the scaling law of the heat exchanger. The black water pipeline module, the water washing tower tray module and the gray water heat exchanger module are connected in parallel, and the three are in a parallel relationship. The black water pipeline module, the water washing tower tray module and the gray water heat exchanger module can be connected with different modules according to different experimental requirements, or can be connected at the same time. Switch valves are arranged on the connecting pipelines, so that only one of the black water pipeline module, the water washing tower tray module and the gray water heat exchanger module can be connected. The water washing tower tray module and the gray water heat exchanger module can also be connected at the same time, that is, when simulating the black water scaling law, the black water pipeline module is connected; when simulating the gray water scaling law, the water washing tower tray module or / and the gray water heat exchanger module is connected. The structure of the dispersant test device 7 is simple, and different water qualities such as black water or gray water can be simulated, which is convenient to control and easy to operate.

[0036] On the basis of each of the above embodiments, the black water pipeline module, the water washing tower tray module and the grey water heat exchanger module are detachably connected with the connecting pipelines on both sides, and the connecting pipelines on both sides are connected with the black water pipeline module, the water washing tower tray module and / or the grey water heat exchanger module. Different modules can be connected according to the simulated water quality, the simulation is more targeted, and misoperation is less likely to occur. The simulation is more accurate and intuitive. The structure is simplified, and the switch valve is omitted, so that the connection is easy.

[0037] On the basis of each of the above embodiments, the water washing tower tray module comprises a grey water inlet pipe 7-1 located at the upper portion, a synthetic gas outlet pipe 7-3, a synthetic gas inlet pipe 7-2 located at the lower portion, a grey water outlet pipe 7-4, and a water washing tower single valve 7-5 and a water washing tower tray descending pipe 7-6 located in the interior. The tower height a of the water washing tower single valve 7-5 is 10-15 mm, the diameter b is 50-100 mm, and the upper cross-sectional diameter c is 30-50 mm. The grey water flows from top to bottom, and the synthetic gas flows from bottom to top. The water washing tower single valve is located in the liquid layer. The structure is close to an industrial device, and the simulation of the water washing tower tray fouling rule is more real and reliable.

[0038] In another more reliable embodiment, on the basis of any one of the above embodiments, a water quality detection device or / and a solid content detection device 5 is connected in series with the connecting pipeline between the pressurizing tank 3 and the circulating water pump 6. The grey water quality detection device 4 can detect online or take samples for analysis at regular intervals. The detection items include Ca 2+ , Mg 2+ , PO4 3+ , CO3 2- , Cl - , SO4 2- , and COD. The black water solid content detection device 5 can detect online or take samples for analysis at regular intervals. Through the water quality detection device and the solid content detection device 5, the indexes of the gasification process water can be better understood, the gasification process water can be stabilized within the set range, the composition of the coal gasification black water and the grey water is closer to the industrial operation composition, and a more accurate coal gasification black water and grey water pipeline fouling rule can be obtained, thereby providing a basic condition for the research on the coal gasification black water and grey water pipeline fouling rule and the development of a dispersant.

[0039] On the basis of each of the above embodiments, a steam heat tracing device is connected in communication with the connecting pipeline between the raw water tank 1 and the pressurizing tank 3. The raw water tank 1, the pressurizing tank 3 and the connecting pipeline therebetween are heated by steam, and the temperature is 60-240°C. The temperature of the coal gasification black water and the grey water is closer to the industrial operation temperature, so that a more accurate coal gasification black water and grey water pipeline fouling rule can be obtained, thereby providing a basic condition for the research on the coal gasification black water and grey water pipeline fouling rule and the development of a dispersant.

[0040] On the basis of the above various embodiments, the gas outlet of the dispersant testing device 7 is connected with the waste gas treatment module 11, and the waste gas treatment module 11 treats the discharged waste gas, such as adsorbing or burning the waste gas, to reduce the harm and pollution of the waste gas. The connecting pipeline between the dispersant testing device 7 and the waste gas treatment module 11 is provided with a pressure venting regulating valve 8, which is used to adjust the internal pressure of the dispersant testing device 7, so that the pressure of the coal gasification black water and ash water is closer to the industrial operation temperature, so as to obtain more accurate black water and ash water pipeline fouling rules, and provide basic conditions for studying the black water and ash water pipeline fouling rules and developing dispersants.

[0041] On the basis of the above various embodiments, the dispersant testing device 7 is connected with the pipeline internal detection system, which is used to detect the pipeline fouling condition. The pipeline internal detection system can obtain the pipeline fouling condition, which is more accurate and intuitive, and is convenient for better analysis.

[0042] On the basis of the above various embodiments, the gas inlet of the dispersant testing device 7 is connected with the gasification gas environment simulation device 9, and the gasification gas environment simulation device 9 includes a gas cylinder and a pressure reducing valve. The main components of the gas cylinder gas composition simulation gas synthesis gas composition are CO, H2 and CO2, and the pressure of the gas cylinder is higher than 4.0 MPa, so that the operation environment of the coal gasification black water and ash water is closer to the industrial operation environment.

[0043] On the basis of the above various embodiments, the treated water outlet of the dispersant testing device 7 is connected with the water inlet of the pressurizing tank 3, and the waste water outlet is connected with the waste water discharge tank 10. The treated gasification process water is repeatedly introduced into the pressurizing tank 3, and the unqualified part is discharged. The gasification process water is repeatedly used, so that the operation environment of the coal gasification black water and ash water is closer to the industrial operation environment.

[0044] The various embodiments in the specification are described in a progressive manner, and each embodiment focuses on the difference from other embodiments. The same or similar parts of each embodiment can be referred to each other.

[0045] The above describes the gasification process water pipeline equipment fouling experimental device provided by the present application in detail. The principles and implementation modes of the present application are described by applying specific examples. The above embodiment is only used to help understand the method and core idea of the present application. It should be pointed out that the ordinary skilled in the art can make some improvements and modifications without departing from the principles of the present application. These improvements and modifications also fall within the protection scope of the claims of the present application. Therefore, the present application will not be limited to the embodiments shown in the text, but will conform to the widest scope consistent with the principles and novel features disclosed in the text.

Claims

1. A gasification process water piping equipment fouling experiment apparatus, characterized by, The device comprises a raw water tank (1) for containing gasification process water, a pressurizing tank (3) with an inlet communicating with the outlet of the raw water tank (1), and a dispersant testing device (7) with an inlet communicating with the outlet of the pressurizing tank (3), the dispersant testing device (7) being used for detecting the scaling condition of the gasification process water, a feed pump (2) and a circulating water pump (6) being connected in series on the connecting pipeline between the pressurizing tank (3) and the raw water tank (1) and on the connecting pipeline between the pressurizing tank (3) and the dispersant testing device (7) respectively, The dispersant testing device (7) comprises a black water pipeline module for simulating the scaling law of black water, a water washing tower tray module for simulating the scaling law of the water washing tower tray, and a grey water heat exchanger module for simulating the scaling law of the heat exchanger, the three modules being in parallel connection, and a switch valve being arranged on the connecting pipeline, so that only one of the three modules or the water washing tower tray module and the grey water heat exchanger module is connected simultaneously. A water quality detection device or / and a solid content detection device (5) is connected in series on the connecting pipeline between the pressurizing tank (3) and the circulating water pump (6), and the water quality detection device or / and the solid content detection device (5) can be used for on-line detection or sampling analysis at a fixed time. The dispersant testing device (7) is connected with a pipeline internal detection system for detecting the scaling condition of the pipeline.

2. The gasification process water pipe fouling experiment apparatus according to claim 1, characterized by, The black water pipeline module, the water washing tower tray module and the grey water heat exchanger module are detachably connected with the connecting pipelines on both sides, and the connecting pipelines on both sides are connected with the black water pipeline module, the water washing tower tray module and / or the grey water heat exchanger module.

3. The gasification process water pipe fouling experiment apparatus according to claim 1, characterized by, The water washing tower tray module comprises a grey water inlet pipe (7-1) at the upper part, a synthetic gas outlet pipe (7-3), a synthetic gas inlet pipe (7-2) at the lower part, a grey water outlet pipe (7-4), and a water washing tower single valve (7-5) and a water washing tower tray descending pipe (7-6) inside.

4. The gasification process water pipe fouling experiment apparatus according to claim 1, characterized by, A steam tracing device is connected on the connecting pipeline between the raw water tank (1) and the pressurizing tank (3).

5. The gasification process water pipe fouling experiment apparatus according to claim 1, characterized by, The outlet of the dispersant testing device (7) is connected with a waste gas treatment module (11), and a pressure venting regulating valve (8) is arranged on the connecting pipeline between the two, the pressure venting regulating valve (8) being used for regulating the internal pressure of the dispersant testing device (7).

6. The gasification process water pipe fouling experiment apparatus according to claim 5, wherein, The inlet of the dispersant testing device (7) is connected with a gasification gas environment simulation device (9).

7. The experimental apparatus for fouling of gasification process water piping according to any one of claims 1 to 6, wherein The treated water outlet of the dispersant testing device (7) is connected with the inlet of the pressurizing tank (3), and the waste water outlet is connected with a waste water discharge tank (10).

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