Phosphate-containing waste liquid and waste gas incineration heat exchange system

Abstract

The utility model provides an incineration heat exchange system for waste liquid and waste gas containing phosphate. The incineration heat exchange system comprises a conveying system and a heat exchange module. The heat exchange module comprises a first heat exchange assembly, a second heat exchange assembly and a fifth heat exchange assembly; the first heat exchange assembly is arranged on the upper portion of the incinerator, the second heat exchange assembly is arranged in a flue on the upper portion of the cooling sedimentation furnace, and the fifth heat exchange assembly is arranged in a flue on the lower portion of the denitration sedimentation furnace. The conveying system comprises a water supply module and an air bag; the water supply module communicates with the fifth heat exchange assembly, and the fifth heat exchange assembly communicates with the air bag. The air bag communicates with the first heat exchange assembly, and the first heat exchange assembly communicates with the air bag. The air bag is further communicated with the second heat exchange assembly, and the second heat exchange assembly is further communicated with the air bag. According to the incineration heat exchange system for the waste gas containing the phosphate waste liquid, heat generated when the waste gas and the waste liquid are treated can be recycled, and internal circulation and external utilization of the system are achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of waste gas and waste liquid treatment, in particular to a waste gas and waste liquid containing phosphate salt incineration heat exchange system. BACKGROUND

[0002] BDO (1,4-butanediol) and ethylene glycol are important organic chemical and fine chemical raw materials, which are widely used in many fields. However, BDO device and ethylene glycol device will produce a large amount of waste gas and waste liquid during use. In addition to organic waste liquid, it also contains two kinds of inorganic salts, sodium hydrogen phosphate and sodium dihydrogen phosphate. Through physical property analysis, sodium hydrogen phosphate and sodium dihydrogen phosphate will decompose to generate sodium peroxide and phosphorus oxide (phosphorus pentoxide) at high temperature. Sodium peroxide and carbon dioxide and water in flue gas will generate sodium carbonate, and sodium peroxide and water vapor in flue gas will also generate sodium hydroxide.

[0003] In the prior art, the waste gas and waste liquid generated during the use of BDO device and ethylene glycol device is usually treated by rectification or incineration. The rectification treatment method has high process control requirements, low treatment efficiency and high cost. The incineration treatment method generates flue gas containing a large amount of heat energy, and high-temperature steam is also consumed during the treatment of waste gas and waste liquid and flue gas, thereby wasting a large amount of heat energy. CONTENT OF THE UTILITY MODEL

[0004] In view of the above problems, the present application provides a waste gas and waste liquid containing phosphate salt incineration heat exchange system, which can recycle the heat generated during the treatment of waste gas and waste liquid, and realize internal circulation and external utilization of the system.

[0005] In order to achieve the purpose of the present application, the present application provides the following technical solutions:

[0006] The present application provides a waste gas and waste liquid containing phosphate salt incineration heat exchange system, comprising: a conveying system and a heat exchange module;

[0007] The heat exchange module comprises: a first heat exchange assembly, a second heat exchange assembly and a fifth heat exchange assembly.

[0008] The first heat exchange assembly is arranged at the upper part of the incinerator, the second heat exchange assembly is arranged in the flue at the upper part of the cooling settling furnace, and the fifth heat exchange assembly is arranged in the flue at the lower part of the denitration settling furnace.

[0009] The conveying system comprises: a water supply module and a gas pocket.

[0010] The output end of the water supply module is in communication with the input end of the fifth heat exchange assembly, and the output end of the fifth heat exchange assembly is in communication with the input end of the gas pocket.

[0011] The output end of the lower part of the gas pocket is in communication with the input end of the first heat exchange component, and the output end of the first heat exchange component is in communication with the input end of the upper part of the gas pocket.

[0012] The output end of the lower part of the gas pocket is in communication with the input end of the second heat exchange component, and the output end of the second heat exchange component is in communication with the input end of the upper part of the gas pocket.

[0013] In a possible implementation, the heat exchange module further comprises a third heat exchange component; the third heat exchange component is arranged in the flue of the upper part of the cooling settling furnace and is located below the second heat exchange component.

[0014] The output end of the upper part of the gas pocket is in communication with the input end of the third heat exchange component, and the output end of the third heat exchange component is in communication with the input end of the lower part of the gas pocket.

[0015] In a possible implementation, the heat exchange module further comprises a fourth heat exchange component; the fourth heat exchange component is arranged at the output end of the cooling settling furnace.

[0016] The output end of the upper part of the gas pocket is in communication with the input end of the fourth heat exchange component, and the output end of the fourth heat exchange component is in communication with the output end of the first heat exchange component.

[0017] In a possible implementation, the output end of the fourth heat exchange component is further in communication with the steam input end of the soot blowing component.

[0018] In a possible implementation, the output end of the fourth heat exchange component is further in communication with the steam input end of the soot blowing component.

[0019] In a possible implementation, the output end of the upper part of the gas pocket is further used for outputting high-temperature steam.

[0020] In a possible implementation, the water supply module is further in communication with the heat exchange medium input end of the cooling component at the bottom of the incinerator.

[0021] In a possible implementation, the conveying system further comprises a boiler water module; the input end of the boiler water module is in communication with the heat exchange medium output end of the water supply module and the cooling component; and the output end of the boiler water module is in communication with the input end of the fifth heat exchange component.

[0022] In a possible implementation, the phosphating waste liquid waste gas incineration heat exchange system further comprises a waste liquid tank; and the output end of the waste liquid tank is in communication with the waste liquid input end of the waste liquid burner.

[0023] In a possible implementation, the phosphorus-containing salt waste liquid waste gas incineration heat exchange system further comprises a nitrogen purging module, which is in communication with the connecting pipeline of the waste liquid tank and the waste liquid combustor.

[0024] Advantages:

[0025] The phosphorus-containing salt waste liquid waste gas incineration heat exchange system provided in the application can recover and utilize the large amount of heat energy contained in the flue gas generated after incineration of the phosphorus-containing salt waste liquid in stages, realizes internal heat circulation in the system, supplies excess steam to other equipment for recycling, and improves the energy utilization efficiency of the system. BRIEF DESCRIPTION OF DRAWINGS

[0026] The accompanying drawings are included to provide a further understanding of the application, and are incorporated in and constitute a part of the specification, illustrate embodiments of the application, and together with the description serve to explain the application, and do not limit the application;

[0027] Fig. 1 A structure schematic view of the phosphorus-containing salt waste liquid waste gas incineration heat exchange system provided in the embodiment of the application is shown in the figure.

[0028] Fig. 2 A structure schematic view of the phosphorus-containing salt waste liquid waste gas incineration heat exchange system provided in the embodiment of the application is shown in the figure.

[0029] Fig. 3 A structure schematic view of the phosphorus-containing salt waste liquid waste gas incineration heat exchange system provided in the embodiment of the application is shown in the figure.

[0030] Reference signs:

[0031] 100-conveying system, 110-water supply module, 120-gas pocket, 130-first conveying pipeline, 140-second conveying pipeline, 150-third conveying pipeline, 160-fourth conveying pipeline, 170-fifth conveying pipeline, 180-sixth conveying pipeline;

[0032] 200-first heat exchange assembly, 300-second heat exchange assembly, 400-third heat exchange assembly, 500-fourth heat exchange assembly, 600-fifth heat exchange assembly, 700-waste liquid combustor, 800-soot blowing assembly;

[0033] A-incinerator, B-cooling and settling furnace, C-denitration settling furnace, D-bag-type dust collector, E-chimney. DETAILED DESCRIPTION

[0034] In order to make the purposes, technical solutions and advantages of the present application clearer, the technical solutions in the present application will be described clearly and completely below in conjunction with the accompanying drawings in the present application. Obviously, the described embodiments are only some 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 of ordinary skill in the art without creative effort belong to the scope of protection of the present application.

[0035] The terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features; in the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0036] Embodiment 1

[0037] Figs. 1-3 A phosphorus-containing salt waste liquid waste gas incineration heat exchange system provided by the embodiment of the present application, comprising: a conveying system 100 and a heat exchange module;

[0038] The heat exchange module comprises: a first heat exchange assembly 200, a second heat exchange assembly 300, and a fifth heat exchange assembly 600.

[0039] The first heat exchange assembly 200 is arranged at the upper part of the incinerator A, the second heat exchange assembly 300 is arranged in the flue at the upper part of the cooling and settling furnace B, and the fifth heat exchange assembly 600 is arranged in the flue at the lower part of the denitration settling furnace C.

[0040] The conveying system 100 comprises: a water supply module 110 and a gas pocket 120.

[0041] The output end of the water supply module 110 is in communication with the input end of the fifth heat exchange assembly 600, and the output end of the fifth heat exchange assembly 600 is in communication with the input end of the gas pocket 120.

[0042] The output end of the lower part of the gas pocket 120 is in communication with the input end of the first heat exchange assembly 200, and the output end of the first heat exchange assembly 200 is in communication with the input end of the upper part of the gas pocket 120.

[0043] The output end of the lower part of the gas pocket 120 is also in communication with the input end of the second heat exchange assembly 300, and the output end of the second heat exchange assembly 300 is also in communication with the input end of the upper part of the gas pocket 120.

[0044] The output end of the fifth heat exchange assembly 600 is in communication with the input end of the gas pocket 120 through a first conveying pipeline 130.

[0045] The input end of the first heat exchange component 200 is communicated with the output end of the lower part of the gas pocket 120 through a second conveying pipeline 140; the output end of the first heat exchange component 200 is communicated with the input end of the upper part of the gas pocket 120 through a third conveying pipeline 150;

[0046] The input end of the second heat exchange component 300 is communicated with the output end of the lower part of the gas pocket 120 through a fourth conveying pipeline 160; the output end of the second heat exchange component 300 is communicated with the input end of the upper part of the gas pocket 120 through a fifth conveying pipeline 170.

[0047] In a possible implementation, the heat exchange module further comprises a third heat exchange component 400; the third heat exchange component 400 is arranged in the flue of the upper part of the cooling settling furnace B and is located below the second heat exchange component 300.

[0048] The upper output end of the gas pocket 120 is communicated with the input end of the third heat exchange component 400, and the output end of the third heat exchange component 400 is communicated with the lower input end of the gas pocket 120.

[0049] The input end of the third heat exchange component 400 is communicated with the output end of the upper part of the gas pocket 120 through a sixth conveying pipeline 180; the output end of the third heat exchange component 400 is communicated with the fifth conveying pipeline 170.

[0050] In a possible implementation, the heat exchange module further comprises a fourth heat exchange component 500; the fourth heat exchange component 500 is arranged at the output end of the cooling settling furnace B.

[0051] The upper output end of the gas pocket 120 is communicated with the input end of the fourth heat exchange component 500, and the output end of the fourth heat exchange component 500 is communicated with the output end of the first heat exchange component 200.

[0052] The input end of the fourth heat exchange component 500 is communicated with the output end of the upper part of the gas pocket 120 through the sixth conveying pipeline 180.

[0053] In a possible implementation, the output end of the fourth heat exchange component 500 is further communicated with the steam input end of the waste liquid combustor 700 of the incinerator A.

[0054] The waste liquid burner 700 adopts an internal mixing type steam atomizing nozzle. The waste liquid is sprayed into a mixing chamber from a middle ring hole, collides and mixes with steam sprayed from corresponding small holes on the side to perform primary atomization. After the pressure in the mixing chamber is established, the gas-liquid mixture is sprayed from the ring-shaped nozzle at the end to perform secondary atomization. In order to obtain smaller and uniform atomized droplet diameter distribution, it is necessary to reasonably adjust parameters such as the gas hole diameter, the liquid hole diameter, the gas-liquid momentum ratio, and the mixing chamber length. Considering that the waste liquid not only participates in the combustion reaction but also absorbs a large amount of heat, in order to reduce the influence of the waste liquid spray on the burner flame, it is necessary to control the spray angle and jet velocity to achieve better matching with the furnace.

[0055] In a possible implementation, the output end of the fourth heat exchange assembly 500 is also in communication with the steam input end of the soot blowing assembly 800.

[0056] The soot blowing assembly 800 is a high-temperature steam soot blowing assembly, which includes a conveying pipeline, a soot blowing nozzle, and a control system.

[0057] The conveying pipeline is a pipeline system for conveying steam from the steam generator to the soot blowing nozzle.

[0058] The soot blowing nozzle is installed at a position where cleaning is required, and steam is sprayed to the cleaned surface at a specific angle and direction. The design of the nozzle should consider the spraying effect and coverage range of the steam to ensure that the surface of the equipment can be fully cleaned.

[0059] The control system is used to control the operation of the steam soot blowing assembly, including the start and stop of the steam generator, the adjustment of steam pressure and flow, and the like.

[0060] In a possible implementation, the upper output end of the gas pocket 120 is also used to output high-temperature steam.

[0061] The upper output end of the gas pocket 120 can be in communication with a production workshop steam pipeline or any device that needs to use high-temperature steam, so as to realize the utilization of high-temperature steam.

[0062] In a possible implementation, the water supply module 110 is also in communication with the heat exchange medium input end of the cooling assembly at the bottom of the incinerator A.

[0063] In a possible implementation, the conveying system 100 further includes a boiler water module. The input end of the boiler water module is in communication with the heat exchange medium output end of the water supply module and the cooling assembly. The output end of the boiler water module is in communication with the input end of the fifth heat exchange assembly 600.

[0064] In a possible implementation, the phosphorus-containing salt-containing waste liquid waste gas incineration heat exchange system further comprises: a waste liquid tank; an output end of the waste liquid tank is in communication with a waste liquid input end of the waste liquid burner 700.

[0065] In a possible implementation, the phosphorus-containing salt-containing waste liquid waste gas incineration heat exchange system further comprises: a nitrogen gas purging module; the nitrogen gas purging module is in communication with connecting pipelines of the waste liquid tank and the waste liquid burner 700.

[0066] Embodiment 2

[0067] On the basis of the foregoing technical solutions, the embodiment of the present application provides a phosphorus-containing salt-containing waste liquid waste gas incineration system, an incinerator, a cooling and settling furnace, and a denitration settling furnace.

[0068] The incinerator output end of the incinerator is in communication with the cooling and settling furnace input end of the cooling and settling furnace, for incinerating waste liquid waste gas, obtaining first flue gas, and obtaining second flue gas after first heat exchange of the first flue gas, and the second flue gas is input into the cooling and settling furnace.

[0069] The cooling and settling furnace output end of the cooling and settling furnace is in communication with the denitration settling furnace input end of the denitration settling furnace, for second heat exchange of the second flue gas, obtaining third flue gas, and obtaining fourth flue gas after third heat exchange of the third flue gas, and the fourth flue gas is input into the denitration settling furnace after settling.

[0070] The denitration settling furnace is used for denitration treatment of the fourth flue gas, obtaining fifth flue gas, and fourth heat exchange of the fifth flue gas to obtain sixth flue gas for settling.

[0071] In a possible implementation, the phosphorus-containing salt-containing waste liquid waste gas incineration treatment system further comprises: a dust removal and discharge module.

[0072] The dust removal and discharge module comprises: a bag-type dust collector and a chimney.

[0073] The bag-type dust collector input end is in communication with the denitration settling furnace output end of the denitration settling furnace, for dust removal of the sixth flue gas to obtain seventh flue gas.

[0074] The chimney input end is in communication with the bag-type dust collector output end, for discharging the seventh flue gas.

[0075] Optionally, the chimney has an induced draft fan at the bottom, for discharging the seventh flue gas through the chimney.

[0076] In a possible implementation, the incinerator has a first heat exchange assembly at the upper portion and an incineration chamber at the lower portion; the incineration chamber has a first discharge port at the bottom and a waste liquid burner and a waste gas burner at the side wall of the bottom.

[0077] Optionally, the bottom of the incineration chamber has a waste liquid burner and a waste gas burner; the waste gas burner is used to spray the waste gas generated by the BDO device and the ethylene glycol device during use into the incineration chamber for incineration; the waste liquid burner is used to spray the waste liquid generated by the BDO device and the ethylene glycol device during use into the incineration chamber in the form of gas mist for incineration.

[0078] The waste liquid burner has an atomizing steam channel and a waste liquid channel, which are used to spray the waste liquid out in the form of mist through atomizing steam.

[0079] Optionally, the incinerator has a standby air inlet.

[0080] Optionally, the furnace type of the incinerator is vertical side-burning.

[0081] In a possible implementation, the upper part of the cooling settling furnace is a flue gas passage, and the lower part is a settling chamber.

[0082] The flue gas passage is provided with a second heat exchange assembly and a third heat exchange assembly.

[0083] Optionally, the second heat exchange assembly is used to exchange heat and cool the second flue gas, and the third heat exchange assembly is used to control the temperature of the third flue gas to keep it within a preset range.

[0084] In a possible implementation, the top of the settling chamber has a baffle; the baffle extends into the interior of the settling chamber, and the bottom of the baffle is lower than the bottom of the output end of the cooling settling furnace.

[0085] The baffle makes the fourth flue gas sink into the settling chamber, and in the process of raising the output of the cooling settling furnace, so that as many solid particles as possible in the fourth flue gas settle into the settling chamber.

[0086] In a possible implementation, the output end of the cooling settling furnace also has a fourth heat exchange assembly for exchanging heat with the fourth flue gas.

[0087] The fourth heat exchange assembly is used to control the temperature of the fourth flue gas within a preset range, so as to ensure that the fourth flue gas and the denitration agent can perform efficient denitration reaction.

[0088] In a possible implementation, the denitration settling furnace has a denitration assembly inside;

[0089] The denitration assembly includes a denitration agent spraying assembly and a partition; the denitration agent spraying assembly is used to spray the denitration agent into the interior of the denitration settling furnace, and the partition can be opened and closed to divide the interior of the denitration settling furnace into multiple spaces when closed.

[0090] Optionally, the partition plate is three, which divides the denitration settler into four spaces, so that the fourth flue gas can fully react with the denitration agent.

[0091] In a possible implementation, the denitration settler bottom passage has a fifth heat exchange component for cooling the fifth flue gas after the denitration reaction, so that the solid particles can be settled.

[0092] In a possible implementation, the cooling settler has a first soot blowing component in the flue gas passage, which is used to blow the solid particles on the surface of the second heat exchange component and the third heat exchange component.

[0093] The denitration settler has a second soot blowing component at the partition plate, which is used to blow the solid particles on the surface of the partition plate.

[0094] The denitration settler has a third soot blowing component in the bottom passage, which is used to blow the solid particles on the surface of the fifth heat exchange component.

[0095] The soot blowing component is used to blow the solid particles on the surface of the heat exchange component, so that the clogging caused by the agglomeration of the solid particles can be prevented, and the corrosion of the solid particles on the surface of the heat exchange component can be reduced.

[0096] In a possible implementation, the bottom of the incinerator has a condenser for cooling the molten salt flowing out of the lower end of the incinerator.

[0097] In a possible implementation, the phosphorus-containing salt-containing waste liquid waste gas incineration treatment system further comprises a support, and the incinerator, the cooling settler, and the denitration settler are integrated on the support.

[0098] In a possible implementation, the input end of the waste liquid burner is connected with a waste liquid conveying system, and the input end of the waste gas burner is connected with a waste gas conveying system.

[0099] The waste liquid conveying system mainly comprises a waste liquid storage tank, a waste liquid pipe, a safety valve, a cut-off valve, a flow meter, a waste liquid pump, a pressure transmitter, a flow regulating valve, and an atomized steam pipeline. The waste liquid storage tank is provided with a waste liquid inlet, a waste liquid outlet, an exhaust port, a manhole, and an instrument port. The safety valve is mainly used to automatically open the exhaust pressure relief when the pressure in the waste liquid storage tank exceeds the set value, to ensure the safety of the storage tank. The atomized steam pipeline is mainly used for waste liquid atomization, to ensure the complete combustion of the waste liquid in the furnace. The waste liquid storage tank has a vertical structure and is provided with an inlet, an outlet, an exhaust port, an instrument port, a manhole, and a liquid level meter.

[0100] The waste gas conveying system mainly comprises a waste gas pipeline, a pressure transmitter, a flow meter, a cut-off valve, and a flow regulating valve.

[0101] The waste gas is sent into the incineration area from the incineration device, and is sent into the incineration furnace to participate in incineration. Through pressure transmitters, flow meters and the like, the waste gas pipeline pressure and flow can be recorded in real time, and the waste gas flow can be automatically adjusted according to the actual working condition through a flow regulating valve; the waste gas buffer tank is a vertical structure, and is provided with an inlet, an outlet, a blowdown port, an instrument port and a safety valve.

[0102] In several embodiments provided in the present application, it should be understood that the disclosed system, module and method can be implemented in other manners. For example, the module embodiments described above are only schematic; the division of the units is only a logical function division; there can be another division manner for the actual implementation, for example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the displayed or discussed mutual couplings or direct couplings or communication connections between different units, or the among different units, can be indirect couplings or communication connections through some interfaces, modules or units, and can be in electrical, mechanical or other forms.

[0103] The above embodiments are only used to illustrate the technical solutions of the present application, rather than limit them. The present application is not limited to the exact structure as described above and shown in the drawings, and the specific implementation of the present application should not be limited to the above description. For ordinary skilled in the art to which the present application belongs, various changes and modifications made without departing from the concept of the present application should be considered to fall within the scope of protection of the present application.

Claims

1. A phosphoric acid salt waste liquid waste gas incineration heat exchange system, characterized in that, The utility model relates to a waste liquid treatment system, comprising: a conveying system (100) and a heat exchange module; the heat exchange module comprises a first heat exchange assembly (200), a second heat exchange assembly (300) and a fifth heat exchange assembly (600); the first heat exchange assembly (200) is arranged at the upper portion of an incinerator (A), the second heat exchange assembly (300) is arranged in the flue at the upper portion of a cooling settling furnace (B), and the fifth heat exchange assembly (600) is arranged in the flue at the lower portion of a denitration settling furnace (C); the conveying system (100) comprises a water supply module (110) and a gas pocket (120); the output end of the water supply module (110) is communicated with the input end of the fifth heat exchange assembly (600), and the output end of the fifth heat exchange assembly (600) is communicated with the input end of the gas pocket (120); the output end at the lower portion of the gas pocket (120) is communicated with the input end of the first heat exchange assembly (200), and the output end of the first heat exchange assembly (200) is communicated with the input end at the upper portion of the gas pocket (120); the output end at the lower portion of the gas pocket (120) is also communicated with the input end of the second heat exchange assembly (300), and the output end of the second heat exchange assembly (300) is also communicated with the input end at the upper portion of the gas pocket (120).

2. The phosphates containing waste liquid waste heat exchange system according to claim 1, characterized in that, the heat exchange module further comprises a third heat exchange assembly (400); the third heat exchange assembly (400) is arranged in the flue at the upper portion of the cooling settling furnace (B) and is located below the second heat exchange assembly (300); the upper output end of the gas pocket (120) is communicated with the input end of the third heat exchange assembly (400), and the output end of the third heat exchange assembly (400) is communicated with the lower input end of the gas pocket (120).

3. The phosphates containing waste liquid waste heat exchange system of claim 1, wherein, the heat exchange module further comprises a fourth heat exchange assembly (500); the fourth heat exchange assembly (500) is arranged at the output end of the cooling settling furnace (B); the upper output end of the gas pocket (120) is communicated with the input end of the fourth heat exchange assembly (500), and the output end of the fourth heat exchange assembly (500) is communicated with the output end of the first heat exchange assembly (200).

4. The phosphates containing waste liquid waste heat exchange system according to claim 3, characterized in that, the output end of the fourth heat exchange assembly (500) is also communicated with the steam input end of a waste liquid burner (700) at the bottom of the incinerator (A).

5. The phosphates containing waste liquid waste heat exchange system of claim 3, wherein, the output end of the fourth heat exchange assembly (500) is also communicated with the steam input end of a soot blowing assembly (800).

6. The phosphates containing waste liquid waste heat exchange system of claim 2, wherein, the upper output end of the gas pocket (120) is also used for outputting high-temperature steam.

7. The phosphates containing liquid waste heat exchange system of claim 1, wherein, the water supply module (110) is also communicated with the heat exchange medium input end of a cooling assembly at the bottom of the incinerator (A).

8. The phosphates containing waste liquid waste heat exchange system according to claim 7, characterized in that, the conveying system (100) further comprises a boiler water module; the input end of the boiler water module is communicated with the heat exchange medium output end of the water supply module and the cooling assembly; and the output end of the boiler water module is communicated with the input end of the fifth heat exchange assembly (600).

9. The phosphates containing waste liquid waste heat exchange system of claim 4, wherein, the utility model further comprises: a waste liquid tank; the output end of the waste liquid tank is communicated with the waste liquid input end of the waste liquid burner (700).

10. The phosphates containing waste liquid waste heat exchange system of claim 9, wherein, the utility model further comprises: a nitrogen gas purging module; the nitrogen gas purging module is communicated with the connecting pipeline of the waste liquid tank and the waste liquid burner (700).

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